Mercurial > hg > xemacs-beta
annotate src/text.c @ 5925:08cfc8f77fb6 cygwin
make space for long ptr, and store as such, for frame in WINDOW data,
add a bit more debugging to debug-mswindow,
Vin Shelton patch to fix M-x shell
| author | Henry Thompson <ht@markup.co.uk> |
|---|---|
| date | Fri, 27 Feb 2015 17:41:20 +0000 |
| parents | 7343a186a475 |
| children | 15041705c196 96fb76dd98df |
| rev | line source |
|---|---|
| 2367 | 1 /* Text manipulation primitives for XEmacs. |
| 771 | 2 Copyright (C) 1995 Sun Microsystems, Inc. |
| 2367 | 3 Copyright (C) 1995, 1996, 2000, 2001, 2002, 2003, 2004 Ben Wing. |
| 771 | 4 Copyright (C) 1999 Martin Buchholz. |
| 5 | |
| 6 This file is part of XEmacs. | |
| 7 | |
|
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8 XEmacs is free software: you can redistribute it and/or modify it |
| 771 | 9 under the terms of the GNU General Public License as published by the |
|
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10 Free Software Foundation, either version 3 of the License, or (at your |
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11 option) any later version. |
| 771 | 12 |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
|
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19 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 771 | 20 |
| 21 /* Synched up with: Not in FSF. */ | |
| 22 | |
| 23 /* Authorship: | |
| 24 */ | |
| 25 | |
| 26 #include <config.h> | |
| 27 #include "lisp.h" | |
| 28 | |
| 29 #include "buffer.h" | |
| 30 #include "charset.h" | |
| 31 #include "file-coding.h" | |
| 32 #include "lstream.h" | |
| 1292 | 33 #include "profile.h" |
| 771 | 34 |
| 35 | |
| 36 /************************************************************************/ | |
| 37 /* long comments */ | |
| 38 /************************************************************************/ | |
| 39 | |
| 2367 | 40 /* NB: Everything below was written by Ben Wing except as otherwise noted. */ |
| 41 | |
| 42 /************************************************************************/ | |
| 43 /* */ | |
| 44 /* */ | |
| 45 /* Part A: More carefully-written documentation */ | |
| 46 /* */ | |
| 47 /* */ | |
| 48 /************************************************************************/ | |
| 49 | |
| 50 /* Authorship: Ben Wing | |
| 51 | |
| 771 | 52 |
| 826 | 53 ========================================================================== |
| 2367 | 54 7. Handling non-default formats |
| 826 | 55 ========================================================================== |
| 771 | 56 |
| 2367 | 57 We support, at least to some extent, formats other than the default |
| 58 variable-width format, for speed; all of these alternative formats are | |
| 59 fixed-width. Currently we only handle these non-default formats in | |
| 60 buffers, because access to their text is strictly controlled and thus | |
| 61 the details of the format mostly compartmentalized. The only really | |
| 62 tricky part is the search code -- the regex, Boyer-Moore, and | |
| 63 simple-search algorithms in search.c and regex.c. All other code that | |
| 64 knows directly about the buffer representation is the basic code to | |
| 65 modify or retrieve the buffer text. | |
| 66 | |
| 67 Supporting fixed-width formats in Lisp strings is harder, but possible | |
| 68 -- FSF currently does this, for example. In this case, however, | |
| 69 probably only 8-bit-fixed is reasonable for Lisp strings -- getting | |
| 70 non-ASCII-compatible fixed-width formats to work is much, much harder | |
| 71 because a lot of code assumes that strings are ASCII-compatible | |
| 72 (i.e. ASCII + other characters represented exclusively using high-bit | |
| 73 bytes) and a lot of code mixes Lisp strings and non-Lisp strings freely. | |
| 74 | |
| 75 The different possible fixed-width formats are 8-bit fixed, 16-bit | |
| 76 fixed, and 32-bit fixed. The latter can represent all possible | |
| 77 characters, but at a substantial memory penalty. The other two can | |
| 78 represent only a subset of the possible characters. How these subsets | |
| 79 are defined can be simple or very tricky. | |
| 80 | |
| 81 Currently we support only the default format and the 8-bit fixed format, | |
| 82 and in the latter, we only allow these to be the first 256 characters in | |
| 83 an Ichar (ASCII and Latin 1). | |
| 84 | |
| 85 One reasonable approach for 8-bit fixed is to allow the upper half to | |
| 86 represent any 1-byte charset, which is specified on a per-buffer basis. | |
| 87 This should work fairly well in practice since most documents are in | |
| 88 only one foreign language (possibly with some English mixed in). I | |
| 89 think FSF does something like this; or at least, they have something | |
| 90 called nonascii-translation-table and use it when converting from | |
| 91 8-bit-fixed text ("unibyte text") to default text ("multibyte text"). | |
| 92 With 16-bit fixed, you could do something like assign chunks of the 64K | |
| 93 worth of characters to charsets as they're encountered in documents. | |
| 94 This should work well with most Asian documents. | |
| 95 | |
| 96 If/when we switch to using Unicode internally, we might have formats more | |
| 97 like this: | |
| 98 | |
| 99 -- UTF-8 or some extension as the default format. Perl uses an | |
| 100 extension that handles 64-bit chars and requires as much as 13 bytes per | |
| 101 char, vs. the standard of 31-bit chars and 6 bytes max. UTF-8 has the | |
| 102 same basic properties as our own variable-width format (see text.c, | |
| 103 Internal String Encoding) and so most code would not need to be changed. | |
| 104 | |
| 105 -- UTF-16 as a "pseudo-fixed" format (i.e. 16-bit fixed plus surrogates | |
| 106 for representing characters not in the BMP, aka >= 65536). The vast | |
| 107 majority of documents will have no surrogates in them so byte/char | |
| 108 conversion will be very fast. | |
| 109 | |
| 110 -- an 8-bit fixed format, like currently. | |
| 111 | |
| 112 -- possibly, UCS-4 as a 32-bit fixed format. | |
| 113 | |
| 114 The fixed-width formats essentially treat the buffer as an array of | |
| 115 8-bit, 16-bit or 32-bit integers. This means that how they are stored | |
| 116 in memory (in particular, big-endian or little-endian) depends on the | |
| 117 native format of the machine's processor. It also means we have to | |
| 118 worry a bit about alignment (basically, we just need to keep the gap an | |
| 119 integral size of the character size, and get things aligned properly | |
| 120 when converting the buffer between formats). | |
| 826 | 121 |
| 122 ========================================================================== | |
| 2367 | 123 8. Using UTF-16 as the default text format |
| 826 | 124 ========================================================================== |
| 125 | |
| 2367 | 126 NOTE: The Eistring API is (or should be) Mule-correct even without |
| 127 an ASCII-compatible internal representation. | |
| 128 | |
| 129 #### Currently, the assumption that text units are one byte in size is | |
| 130 embedded throughout XEmacs, and `Ibyte *' is used where `Itext *' should | |
| 131 be. The way to fix this is to (among other things) | |
| 132 | |
| 133 (a) review all places referencing `Ibyte' and `Ibyte *', change them to | |
| 134 use Itext, and fix up the code. | |
| 135 (b) change XSTRING_DATA to be of type Itext * | |
| 136 (c) review all uses of XSTRING_DATA | |
| 137 (d) eliminate XSTRING_LENGTH, splitting it into XSTRING_BYTE_LENGTH and | |
| 138 XSTRING_TEXT_LENGTH and reviewing all places referencing this | |
| 139 (e) make similar changes to other API's that refer to the "length" of | |
| 140 something, such as qxestrlen() and eilen() | |
| 141 (f) review all use of `CIbyte *'. Currently this is usually a way of | |
| 142 passing literal ASCII text strings in places that want internal text. | |
| 143 Either create separate _ascii() and _itext() versions of the | |
| 144 functions taking CIbyte *, or make use of something like the | |
| 145 WEXTTEXT() macro, which will generate wide strings as appropriate. | |
| 146 (g) review all uses of Bytecount and see which ones should be Textcount. | |
| 147 (h) put in error-checking code that will be tripped as often as possible | |
| 148 when doing anything with internal text, and check to see that ASCII | |
| 149 text has not mistakenly filtered in. This should be fairly easy as | |
| 150 ASCII text will generally be entirely spaces and letters whereas every | |
| 151 second byte of Unicode text will generally be a null byte. Either we | |
| 152 abort if the second bytes are entirely letters and numbers, or, | |
| 153 perhaps better, do the equivalent of a non-MULE build, where we should | |
| 154 be dealing entirely with 8-bit characters, and assert that the high | |
| 155 bytes of each pair are null. | |
| 156 (i) review places where xmalloc() is called. If we convert each use of | |
| 157 xmalloc() to instead be xnew_array() or some other typed routine, | |
| 158 then we will find every place that allocates space for Itext and | |
| 159 assumes it is based on one-byte units. | |
| 160 (j) encourage the use of ITEXT_ZTERM_SIZE instead of '+ 1' whenever we | |
| 161 are adding space for a zero-terminator, to emphasize what we are | |
| 162 doing and make sure the calculations are correct. Similarly for | |
| 163 EXTTEXT_ZTERM_SIZE. | |
| 164 (k) Note that the qxestr*() functions, among other things, will need to | |
| 165 be rewritten. | |
| 166 | |
| 167 Note that this is a lot of work, and is not high on the list of priorities | |
| 168 currently. | |
| 826 | 169 |
| 170 ========================================================================== | |
| 2367 | 171 9. Miscellaneous |
| 826 | 172 ========================================================================== |
| 173 | |
| 174 A. Unicode Support | |
| 771 | 175 |
| 1292 | 176 Unicode support is very desirable. Currrently we know how to handle |
| 177 externally-encoded Unicode data in various encodings -- UTF-16, UTF-8, | |
| 178 etc. However, we really need to represent Unicode characters internally | |
| 179 as-is, rather than converting to some language-specific character set. | |
| 180 For efficiency, we should represent Unicode characters using 3 bytes | |
| 181 rather than 4. This means we need to find leading bytes for Unicode. | |
| 182 Given that there are 65,536 characters in Unicode and we can attach | |
| 183 96x96 = 9,216 characters per leading byte, we need eight leading bytes | |
| 184 for Unicode. We currently have four free (0x9A - 0x9D), and with a | |
| 185 little bit of rearranging we can get five: ASCII doesn't really need to | |
| 186 take up a leading byte. (We could just as well use 0x7F, with a little | |
| 187 change to the functions that assume that 0x80 is the lowest leading | |
| 188 byte.) This means we still need to dump three leading bytes and move | |
| 189 them into private space. The CNS charsets are good candidates since | |
| 190 they are rarely used, and JAPANESE_JISX0208_1978 is becoming less and | |
| 191 less used and could also be dumped. | |
| 826 | 192 |
| 193 B. Composite Characters | |
| 194 | |
| 195 Composite characters are characters constructed by overstriking two | |
| 771 | 196 or more regular characters. |
| 197 | |
| 198 1) The old Mule implementation involves storing composite characters | |
| 199 in a buffer as a tag followed by all of the actual characters | |
| 200 used to make up the composite character. I think this is a bad | |
| 201 idea; it greatly complicates code that wants to handle strings | |
| 202 one character at a time because it has to deal with the possibility | |
| 203 of great big ungainly characters. It's much more reasonable to | |
| 204 simply store an index into a table of composite characters. | |
| 205 | |
| 206 2) The current implementation only allows for 16,384 separate | |
| 207 composite characters over the lifetime of the XEmacs process. | |
| 208 This could become a potential problem if the user | |
| 209 edited lots of different files that use composite characters. | |
| 210 Due to FSF bogosity, increasing the number of allowable | |
| 211 composite characters under Mule would decrease the number | |
| 212 of possible faces that can exist. Mule already has shrunk | |
| 213 this to 2048, and further shrinkage would become uncomfortable. | |
| 214 No such problems exist in XEmacs. | |
| 215 | |
| 3498 | 216 Composite characters could be represented as 0x8D C1 C2 C3, where each |
| 217 C[1-3] is in the range 0xA0 - 0xFF. This allows for slightly under | |
| 218 2^20 (one million) composite characters over the XEmacs process | |
| 219 lifetime. Or you could use 0x8D C1 C2 C3 C4, allowing for about 85 | |
| 220 million (slightly over 2^26) composite characters. | |
| 826 | 221 |
| 2367 | 222 ========================================================================== |
| 223 10. Internal API's | |
| 224 ========================================================================== | |
| 225 | |
| 226 All of these are documented in more detail in text.h. | |
| 227 | |
| 228 @enumerate | |
| 229 @item | |
| 230 Basic internal-format API's | |
| 231 | |
| 232 These are simple functions and macros to convert between text | |
| 233 representation and characters, move forward and back in text, etc. | |
| 234 | |
| 235 @item | |
| 236 The DFC API | |
| 237 | |
| 238 This is for conversion between internal and external text. Note that | |
| 239 there is also the "new DFC" API, which *returns* a pointer to the | |
| 240 converted text (in alloca space), rather than storing it into a | |
| 241 variable. | |
| 242 | |
| 243 @item | |
| 244 The Eistring API | |
| 245 | |
| 4073 | 246 \(This API is currently under-used) When doing simple things with |
| 2367 | 247 internal text, the basic internal-format API's are enough. But to do |
| 248 things like delete or replace a substring, concatenate various strings, | |
| 249 etc. is difficult to do cleanly because of the allocation issues. | |
| 250 The Eistring API is designed to deal with this, and provides a clean | |
| 251 way of modifying and building up internal text. (Note that the former | |
| 252 lack of this API has meant that some code uses Lisp strings to do | |
| 253 similar manipulations, resulting in excess garbage and increased | |
| 254 garbage collection.) | |
| 255 | |
| 256 NOTE: The Eistring API is (or should be) Mule-correct even without | |
| 257 an ASCII-compatible internal representation. | |
| 258 @end enumerate | |
| 259 | |
| 260 ========================================================================== | |
| 261 11. Other Sources of Documentation | |
| 262 ========================================================================== | |
| 263 | |
| 264 man/lispref/mule.texi | |
| 265 @enumerate | |
| 266 @item | |
| 267 another intro to characters, encodings, etc; #### Merge with the | |
| 268 above info | |
| 269 @item | |
| 270 documentation of ISO-2022 | |
| 271 @item | |
| 272 The charset and coding-system Lisp API's | |
| 273 @item | |
| 274 The CCL conversion language for writing encoding conversions | |
| 275 @item | |
| 276 The Latin-Unity package for unifying Latin charsets | |
| 277 @end enumerate | |
| 278 | |
| 279 man/internals/internals.texi (the Internals manual) | |
| 280 @enumerate | |
| 281 @item | |
| 282 "Coding for Mule" -- how to write Mule-aware code | |
| 283 @item | |
| 284 "Modules for Internationalization" | |
| 285 @item | |
| 286 "The Text in a Buffer" -- more about the different ways of | |
| 287 viewing buffer positions; #### Merge with the above info | |
| 288 @item | |
| 289 "MULE Character Sets and Encodings" -- yet another intro | |
| 290 to characters, encodings, etc; #### Merge with the | |
| 291 above info; also some documentation of Japanese EUC and JIS7, | |
| 292 and CCL internals | |
| 293 @end enumerate | |
| 294 | |
| 295 text.h -- info about specific XEmacs-C API's for handling internal and | |
| 296 external text | |
| 297 | |
| 298 intl-win32.c -- Windows-specific I18N information | |
| 299 | |
| 300 lisp.h -- some info appears alongside the definitions of the basic | |
| 301 character-related types | |
| 302 | |
| 303 unicode.c -- documentation about Unicode translation tables | |
| 826 | 304 */ |
| 771 | 305 |
| 2367 | 306 |
| 307 /************************************************************************/ | |
| 308 /* */ | |
| 309 /* */ | |
| 310 /* Part B: Random proposals for work to be done */ | |
| 311 /* */ | |
| 312 /* */ | |
| 313 /************************************************************************/ | |
| 314 | |
| 315 | |
| 316 /* | |
| 317 | |
| 318 | |
| 319 ========================================================================== | |
| 320 - Mule design issues (ben) | |
| 321 ========================================================================== | |
| 322 | |
| 323 circa 1999 | |
| 324 | |
| 325 Here is a more detailed list of Mule-related projects that we will be | |
| 326 working on. They are more or less ordered according to how we will | |
| 327 proceed, but it's not exact. In particular, there will probably be | |
| 328 time overlap among adjacent projects. | |
| 329 | |
| 330 @enumerate | |
| 331 @item | |
| 332 Modify the internal/external conversion macros to allow for | |
| 333 MS Windows support. | |
| 334 | |
| 335 @item | |
| 336 Modify the buffer macros to allow for more than one internal | |
| 337 representation, e.g. fixed width and variable width. | |
| 338 | |
| 339 @item | |
| 340 Review the existing Mule code, especially the lisp code, for code | |
| 341 quality issues and improve the cleanliness of it. Also work on | |
| 342 creating a specification for the Mule API. | |
| 343 | |
| 344 @item | |
| 345 Write some more automated mule tests. | |
| 346 | |
| 347 @item | |
| 348 Integrate Tomohiko's UTF-2000 code, fixing it up so that nothing is | |
| 349 broken when the UTF-2000 configure option is not enabled. | |
| 350 | |
| 351 @item | |
| 352 Fix up the MS Windows code to be Mule-correct, so that you can | |
| 353 compile with Mule support under MS windows and have a working | |
| 354 XEmacs, at least just with Latin-1. | |
| 355 | |
| 356 @item | |
| 357 Implement a scheme to guarantee no corruption of files, even with | |
| 358 an incorrect coding system - in particular, guarantee no corruption | |
| 359 of binary files. | |
| 360 | |
| 361 @item | |
| 362 Make the text property support in XEmacs robust with respect to | |
| 363 string and text operations, so that the `no corruption' support in | |
| 364 the previous entry works properly, even if a lot of cutting and | |
| 365 pasting is done. | |
| 366 | |
| 367 @item | |
| 368 Improve the handling of auto-detection so that, when there is any | |
| 369 possibility at all of mistake, the user is informed of the detected | |
| 370 encoding and given the choice of choosing other possibilities. | |
| 371 | |
| 372 @item | |
| 373 Improve the support for different language environments in XEmacs, | |
| 374 for example, the priority of coding systems used in auto-detection | |
| 375 should properly reflect the language environment. This probably | |
| 376 necessitates rethinking the current `coding system priority' | |
| 377 scheme. | |
| 378 | |
| 379 @item | |
| 380 Do quality work to improve the existing UTF-2000 implementation. | |
| 381 | |
| 382 @item | |
| 383 Implement preliminary support for 8-bit fixed width | |
| 384 representation. First, we will only implement 7-bit support, and | |
| 385 will fall back to variable width as soon as any non-ASCII | |
| 386 character is encountered. Then we will improve the support to | |
| 387 handle an arbitrary character set in the upper half of the 8-bit space. | |
| 388 | |
| 389 @item | |
| 390 Investigate any remaining hurdles to making --with-mule be the | |
| 391 default configure option. | |
| 392 @end enumerate | |
| 393 | |
| 394 ========================================================================== | |
| 395 - Mule design issues (stephen) | |
| 396 ========================================================================== | |
| 397 | |
| 398 What I see as Mule priorities (in rough benefit order, I am not taking | |
| 399 account of difficulty, nor the fact that some - eg 8 & 10 - will | |
| 400 probably come as packages): | |
| 401 | |
| 402 @enumerate | |
| 403 @item | |
| 404 Fix the autodetect problem (by making the coding priority list | |
| 405 user-configurable, as short as he likes, even null, with "binary" | |
| 406 as the default). | |
| 407 @item | |
| 408 Document the language environments and other Mule "APIs" as | |
| 409 implemented (since there is no real design spec). Check to see | |
| 410 how and where they are broken. | |
| 411 @item | |
| 412 Make the Mule menu useful to non-ISO-2022-literate folks. | |
| 413 @item | |
| 414 Redo the lstreams stuff to make it easy and robust to "pipeline", | |
| 415 eg, libz | gnupg | jis2mule. | |
| 416 @item | |
| 417 Make Custom Mule-aware. (This probably depends on a sensible | |
| 418 fonts model.) | |
| 419 @item | |
| 420 Implement the "literal byte stream" memory feature. | |
| 421 @item | |
| 422 Study the FSF implementation of Mule for background for 7 & 8. | |
| 423 @item | |
| 424 Identify desirable Mule features (eg, i18n-ized messages as above, | |
| 425 collating tables by language environment, etc). (New features | |
| 426 might have priority as high as 9.) | |
| 427 @item | |
| 428 Specify Mule UIs, APIs, etc, and design and (re)implement them. | |
| 429 @item | |
| 430 Implement the 8-bit-wide buffer optimization. | |
| 431 @item | |
| 432 Move the internal encoding to UTF-32 (subject to Olivier's caveats | |
| 433 regarding compose characters), with the variable-width char | |
| 434 buffers using UTF-8. | |
| 435 @item | |
| 436 Implement the 16- and 32-bit-wide buffer optimizations. | |
| 437 @end enumerate | |
| 438 | |
| 439 ========================================================================== | |
| 440 - Mule design issues "short term" (ben) | |
| 441 ========================================================================== | |
| 442 | |
| 443 @enumerate | |
| 444 @item | |
| 445 Finish changes in fixup/directory, get in CVS. | |
| 446 | |
| 447 (Test with and without "quick-build", to see if really faster) | |
| 448 (need autoconf) | |
| 449 | |
| 450 @item | |
| 451 Finish up Windows/Mule changes. Outline of this elsewhere; Do | |
| 452 *minimal* effort. | |
| 453 | |
| 454 @item | |
| 455 Continue work on Windows stability, e.g. go through existing notes | |
| 456 on Windows Mule-ization + extract all info. | |
| 457 | |
| 458 @item | |
| 459 Get Unicode translation tables integrated. | |
| 460 | |
| 461 Finish UCS2/UTF16 coding system. | |
| 462 | |
| 463 @item | |
| 464 Make sure coding system priority list is language-environment specific. | |
| 465 | |
| 466 @item | |
| 467 Consider moving language selection Menu up to be parallel with Mule menu. | |
| 468 | |
| 469 @item | |
| 470 Check to make sure we grok the default locale at startup under | |
| 471 Windows and understand the Windows locales. Finish implementation | |
| 472 of mswindows-multibyte and make sure it groks all the locales. | |
| 473 | |
| 474 @item | |
| 475 Do the above as best as we can without using Unicode tables. | |
| 476 | |
| 477 @item | |
| 478 Start tagging all text with a language text property, | |
| 479 indicating the current language environment when the text was input. | |
| 480 | |
| 481 @item | |
| 482 Make sure we correctly accept input of non-ASCII chars | |
| 483 (probably already do!) | |
| 484 | |
| 485 @item | |
| 486 Implement active language/keyboard switching under Windows. | |
| 487 | |
| 488 @item | |
| 489 Look into implementing support for "MS IME" protocol (Microsoft | |
| 490 fancy built-in Asian input methods). | |
| 491 | |
| 492 @item | |
| 493 Redo implementation of mswindows-multibyte and internal display to | |
| 494 entirely use translation to/from Unicode for increased accuracy. | |
| 495 | |
| 496 @item | |
| 497 Implement buf<->char improvements from FSF. Also implement | |
| 498 my string byte<->char optimization structure. | |
| 499 | |
| 500 @item | |
| 501 Integrate all Mule DOCS from 20.6 or 21.0. Try to add sections | |
| 502 for what we've added. | |
| 503 | |
| 504 @item | |
| 505 Implement 8-bit fixed width optimizations. Then work on 16-bit. | |
| 506 @end enumerate | |
| 507 | |
| 508 ========================================================================== | |
| 509 - Mule design issues (more) (ben) | |
| 510 ========================================================================== | |
| 511 | |
| 512 Get minimal Mule for Windows working using Ikeyama's patches. At | |
| 513 first, rely on his conversion of internal -> external | |
| 514 locale-specific but very soon (as soon as we get translation | |
| 515 tables) can switch to using Unicode versions of display funs, which | |
| 516 will allow many more charsets to be handled and in a more | |
| 517 consistent fashion. | |
| 518 | |
| 519 i.e. to convert an internal string to an external format, at first | |
| 520 we use our own knowledge of the Microsoft locale file formats but | |
| 521 an alternative is to convert to Unicode and use Microsoft's | |
| 522 convert-Unicode-to-locale encoding functions. This gains us a | |
| 523 great deal of generality, since in practice all charset caching | |
| 524 points can be wrapped into Unicode caching points. | |
| 525 | |
| 526 This requires adding UCS2 support, which I'm doing. This support | |
| 527 would let us convert internal -> Unicode, which is exactly what we | |
| 528 want. | |
| 529 | |
| 530 At first, though, I would do the UCS2 support, but leave the | |
| 531 existing way of doing things in redisplay. Meanwhile, I'd go | |
| 532 through and fix up the places in the code that assume we are | |
| 533 dealing with unibytes. | |
| 534 | |
| 535 After this, the font problems will be fixed , we should have a | |
| 536 pretty well working XEmacs + MULE under Windows. The only real | |
| 537 other work is the clipboard code, which should be straightforward. | |
| 538 | |
| 539 ========================================================================== | |
| 540 - Mule design discussion | |
| 541 ========================================================================== | |
| 542 | |
| 543 -------------------------------------------------------------------------- | |
| 544 | |
| 545 Ben | |
| 546 | |
| 547 April 11, 2000 | |
| 548 | |
| 549 Well yes, this was the whole point of my "no lossage" proposal of being | |
| 550 able to undo any coding-system transformation on a buffer. The idea was | |
|
5384
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Jerry James <james@xemacs.org>
parents:
5191
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changeset
|
551 to figure out which transformations were definitely reversible, and for |
| 2367 | 552 all the others, cache the original text in a text property. This way, you |
| 553 could probably still do a fairly good job at constructing a good reversal | |
| 554 even after you've gone into the text and added, deleted, and rearranged | |
| 555 some things. | |
| 556 | |
| 557 But you could implement it much more simply and usefully by just | |
| 558 determining, for any text being decoded into mule-internal, can we go back | |
| 559 and read the source again? If not, remember the entire file (GNUS | |
| 560 message, etc) in text properties. Then, implement the UI interface (like | |
| 561 Netscape's) on top of that. This way, you have something that at least | |
| 562 works, but it might be inefficient. All we would need to do is work on | |
| 563 making the | |
| 564 underlying implementation more efficient. | |
| 565 | |
| 566 Are you interested in doing this? It would be a huge win for users. | |
| 567 Hrvoje Niksic wrote: | |
| 568 | |
| 569 > Ben Wing <ben@666.com> writes: | |
| 570 > | |
| 571 > > let me know exactly what "rethink" functionality you want and i'll | |
| 572 > > come up with an interface. perhaps you just want something like | |
| 573 > > netscape's encoding menu, where if you switch encodings, it reloads | |
| 574 > > and reencodes? | |
| 575 > | |
| 576 > It might be a bit more complex than that. In many cases, it's hard or | |
| 577 > impossible to meaningfully "reload" -- for instance, this | |
| 578 > functionality should be available while editing a Gnus message, as | |
| 579 > well as while visiting a file. | |
| 580 > | |
| 581 > For the special case of Latin-N <-> Latin-M conversion, things could | |
| 582 > be done easily -- to convert from N to M, you only need to convert | |
| 583 > internal representation back to N, and then convert it forth to M. | |
| 584 | |
| 585 -------------------------------------------------------------------------- | |
| 586 April 11, 2000 | |
| 587 | |
| 588 Well yes, this was the whole point of my "no lossage" proposal of being | |
| 589 able to undo any coding-system transformation on a buffer. The idea was | |
|
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Jerry James <james@xemacs.org>
parents:
5191
diff
changeset
|
590 to figure out which transformations were definitely reversible, and for |
| 2367 | 591 all the others, cache the original text in a text property. This way, you |
| 592 could probably still do a fairly good job at constructing a good reversal | |
| 593 even after you've gone into the text and added, deleted, and rearranged | |
| 594 some things. | |
| 595 | |
| 596 But you could implement it much more simply and usefully by just | |
| 597 determining, for any text being decoded into mule-internal, can we go back | |
| 598 and read the source again? If not, remember the entire file (GNUS | |
| 599 message, etc) in text properties. Then, implement the UI interface (like | |
| 600 Netscape's) on top of that. This way, you have something that at least | |
| 601 works, but it might be inefficient. All we would need to do is work on | |
| 602 making the | |
| 603 underlying implementation more efficient. | |
| 604 | |
| 605 Are you interested in doing this? It would be a huge win for users. | |
| 606 Hrvoje Niksic wrote: | |
| 607 | |
| 608 > Ben Wing <ben@666.com> writes: | |
| 609 > | |
| 610 > > let me know exactly what "rethink" functionality you want and i'll | |
| 611 > > come up with an interface. perhaps you just want something like | |
| 612 > > netscape's encoding menu, where if you switch encodings, it reloads | |
| 613 > > and reencodes? | |
| 614 > | |
| 615 > It might be a bit more complex than that. In many cases, it's hard or | |
| 616 > impossible to meaningfully "reload" -- for instance, this | |
| 617 > functionality should be available while editing a Gnus message, as | |
| 618 > well as while visiting a file. | |
| 619 > | |
| 620 > For the special case of Latin-N <-> Latin-M conversion, things could | |
| 621 > be done easily -- to convert from N to M, you only need to convert | |
| 622 > internal representation back to N, and then convert it forth to M. | |
| 623 | |
| 624 | |
| 625 ------------------------------------------------------------------------ | |
| 626 | |
| 627 ========================================================================== | |
| 628 - Redoing translation macros [old] | |
| 629 ========================================================================== | |
| 630 | |
| 631 Currently the translation macros (the macros with names such as | |
| 632 GET_C_STRING_CTEXT_DATA_ALLOCA) have names that are difficult to parse | |
| 633 or remember, and are not all that general. In the process of | |
| 634 reviewing the Windows code so that it could be muleized, I discovered | |
| 635 that these macros need to be extended in various ways to allow for | |
| 636 the Windows code to be easily muleized. | |
| 637 | |
| 638 Since the macros needed to be changed anyways, I figured it would be a | |
| 639 good time to redo them properly. I propose new macros which have | |
| 640 names like this: | |
| 641 | |
| 642 @itemize @bullet | |
| 643 @item | |
| 644 <A>_TO_EXTERNAL_FORMAT_<B> | |
| 645 @item | |
| 646 <A>_TO_EXTERNAL_FORMAT_<B>_1 | |
| 647 @item | |
| 648 <C>_TO_INTERNAL_FORMAT_<D> | |
| 649 @item | |
| 650 <C>_TO_INTERNAL_FORMAT_<D>_1 | |
| 651 @end itemize | |
| 652 | |
| 653 A and C represent the source of the data, and B and D represent the | |
| 654 sink of the data. | |
| 655 | |
| 656 All of these macros call either the functions | |
| 657 convert_to_external_format or convert_to_internal_format internally, | |
| 658 with some massaging of the arguments. | |
| 659 | |
| 660 All of these macros take the following arguments: | |
| 661 | |
| 662 @itemize @bullet | |
| 663 @item | |
| 664 First, one or two arguments indicating the source of the data. | |
| 665 @item | |
| 666 Second, an argument indicating the coding system. (In order to avoid | |
| 667 an excessive number of macros, we no longer provide separate macros | |
| 668 for specific coding systems.) | |
| 669 @item | |
| 670 Third, one or two arguments indicating the sink of the data. | |
| 671 @item | |
| 672 Fourth, optionally, arguments indicating the error behavior and the | |
| 673 warning class (these arguments are only present in the _1 versions | |
| 674 of the macros). The other, shorter named macros are trivial | |
| 675 interfaces onto these macros with the error behavior being | |
| 676 ERROR_ME_WARN, with the warning class being Vstandard_warning_class. | |
| 677 @end itemize | |
| 678 | |
| 679 <A> can be one of the following: | |
| 680 @itemize @bullet | |
| 681 @item | |
| 682 LISP (which means a Lisp string) Takes one argument, a Lisp Object. | |
| 683 @item | |
| 684 LSTREAM (which indicates an lstream) Takes one argument, an | |
| 685 lstream. The data is read from the lstream until EOF is reached. | |
| 686 @item | |
| 687 DATA (which indicates a raw memory area) Takes two arguments, a | |
| 688 pointer and a length in bytes. | |
| 689 (You must never use this if the source of the data is a Lisp string, | |
| 690 because of the possibility of relocation during garbage collection.) | |
| 691 @end itemize | |
| 692 | |
| 693 <B> can be one of the following: | |
| 694 @itemize @bullet | |
| 695 @item | |
| 696 ALLOCA (which means that the resulting data is stored in alloca()ed | |
| 697 memory. Two arguments should be specified, a pointer and a length, | |
| 698 which should be lvalues.) | |
| 699 @item | |
| 700 MALLOC (which means that the resulting data is stored in malloc()ed | |
| 701 memory. Two arguments should be specified, a pointer and a | |
| 702 length. The memory must be free()d by the caller. | |
| 703 @item | |
| 704 OPAQUE (which means the resulting data is stored in an opaque Lisp | |
| 705 Object. This takes one argument, a lvalue Lisp Object. | |
| 706 @item | |
| 707 LSTREAM. The data is written to an lstream. | |
| 708 @end itemize | |
| 709 | |
| 710 <C> can be one of the : | |
| 711 @itemize @bullet | |
| 712 @item | |
| 713 DATA | |
| 714 @item | |
| 715 LSTREAM | |
| 716 @end itemize | |
| 717 (just like <A> above) | |
| 718 | |
| 719 <D> can be one of | |
| 720 @itemize @bullet | |
| 721 @item | |
| 722 ALLOCA | |
| 723 @item | |
| 724 MALLOC | |
| 725 @item | |
| 726 LISP This means a Lisp String. | |
| 727 @item | |
| 728 BUFFER The resulting data is inserted into a buffer at the buffer's | |
| 729 value of point. | |
| 730 @item | |
| 731 LSTREAM The data is written to the lstream. | |
| 732 @end itemize | |
| 733 | |
| 734 | |
| 735 Note that I have eliminated the FORMAT argument of previous macros, | |
| 736 and replaced it with a coding system. This was made possible by | |
| 737 coding system aliases. In place of old `format's, we use a `virtual | |
| 738 coding system', which is aliased to the actual coding system. | |
| 739 | |
| 740 The value of the coding system argument can be anything that is legal | |
| 741 input to get_coding_system, i.e. a symbol or a coding system object. | |
| 742 | |
| 743 ========================================================================== | |
| 744 - creation of generic macros for accessing internally formatted data [old] | |
| 745 ========================================================================== | |
| 746 | |
| 747 I have a design; it's all written down (I did it in Tsukuba), and I just have | |
| 748 to have it transcribed. It's higher level than the macros, though; it's Lisp | |
| 749 primitives that I'm designing. | |
| 750 | |
| 751 As for the design of the macros, don't worry so much about all files having to | |
| 752 get included (which is inevitable with macros), but about how the files are | |
| 753 separated. Your design might go like this: | |
| 754 | |
| 755 @enumerate | |
| 756 @item | |
| 757 you have generic macro interfaces, which specify a particular | |
| 758 behavior but not an implementation. these generic macros have | |
| 759 complementary versions for buffers and for strings (and the buffer | |
| 760 or string is an argument to all of the macros), and do such things | |
| 761 as convert between byte and char indices, retrieve the character at | |
| 762 a particular byte or char index, increment or decrement a byte | |
| 763 index to the beginning of the next or previous character, indicate | |
| 764 the number of bytes occupied by the character at a particular byte | |
| 765 or character index, etc. These are similar to what's already out | |
| 766 there except that they confound buffers and strings and that they | |
| 767 can also work with actual char *'s, which I think is a really bad | |
| 768 idea because it encourages code to "assume" that the representation | |
| 769 is ASCII compatible, which is might not be (e.g. 16-bit fixed | |
| 770 width). In fact, one thing I'm planning on doing is redefining | |
| 771 Bufbyte as a struct, for debugging purposes, to catch all places | |
| 772 that cavalierly compare them with ASCII char's. Note also that I | |
| 773 really want to rename Bufpos and Bytind, which are confusing and | |
| 774 wrong in that they also apply to strings. They should be Bytepos | |
| 775 and Charpos, or something like that, to go along with Bytecount and | |
| 776 Charcount. Similarly, Bufbyte is similarly a misnomer and should be | |
| 777 Intbyte -- a byte in the internal string representation (any of the | |
| 778 internal representations) of a string or buffer. Corresponding to | |
| 779 this is Extbyte (which we already have), a byte in any external | |
| 780 string representation. We also have Extcount, which makes sense, | |
| 781 and we might possibly want Extcharcount, the number of characters | |
| 782 in an external string representation; but that gets sticky in modal | |
| 783 encodings, and it's not clear how useful it would be. | |
| 784 | |
| 785 @item | |
| 786 for all generic macro interfaces, there are specific versions of | |
| 787 each of them for each possible representation (pure ASCII in the | |
| 788 non-Mule world, Mule standard, UTF-8, 8-bit fixed, 16-bit fixed, | |
| 789 32-bit fixed, etc.; there may well be more than one possible 16-bit | |
| 790 fixed version, as well). Each representation has a corresponding | |
| 791 prefix, e.g. MULE_ or FIXED16_ or whatever, which is prefixed onto | |
| 792 the generic macro names. The resulting macros perform the | |
| 793 operation defined for the macro, but assume, and only work | |
| 794 correctly with, text in the corresponding representation. | |
| 795 | |
| 796 @item | |
| 797 The definition of the generic versions merely conditionalizes on | |
| 798 the appropriate things (i.e. bit flags in the buffer or string | |
| 799 object) and calls the appropriate representation-specific version. | |
| 800 There may be more than one definition (protected by ifdefs, of | |
| 801 course), or one definition that amalgamated out of many ifdef'ed | |
| 802 sections. | |
| 803 | |
| 804 @item | |
| 805 You should probably put each different representation in its own | |
| 806 header file, e.g. charset-mule.h or charset-fixed16.h or | |
| 807 charset-ascii.h or whatever. Then put the main macros into | |
| 808 charset.h, and conditionalize in this file appropriately to include | |
| 809 the other ones. That way, code that actually needs to play around | |
| 810 with internal-format text at this level can include "charset.h" | |
| 811 (certainly a much better place than buffer.h), and everyone else | |
| 812 uses higher-level routines. The representation-specific macros | |
| 813 should not normally be used *directly* at all; they are invoked | |
| 814 automatically from the generic macros. However, code that needs to | |
| 815 be highly, highly optimized might choose to take a loop and write | |
| 816 two versions of it, one for each representation, to avoid the | |
| 817 per-loop-iteration cost of a comparison. Until the macro interface | |
| 818 is rock stable and solid, we should strongly discourage such | |
| 819 nanosecond optimizations. | |
| 820 @end enumerate | |
| 821 | |
| 822 ========================================================================== | |
| 823 - UTF-16 compatible representation | |
| 824 ========================================================================== | |
| 825 | |
| 826 NOTE: One possible default internal representation that was compatible | |
| 827 with UTF16 but allowed all possible chars in UCS4 would be to take a | |
| 828 more-or-less unused range of 2048 chars (not from the private area | |
| 829 because Microsoft actually uses up most or all of it with EUDC chars). | |
| 830 Let's say we picked A400 - ABFF. Then, we'd have: | |
| 831 | |
| 832 0000 - FFFF Simple chars | |
| 833 | |
| 834 D[8-B]xx D[C-F]xx Surrogate char, represents 1M chars | |
| 835 | |
| 836 A[4-B]xx D[C-F]xx D[C-F]xx Surrogate char, represents 2G chars | |
| 837 | |
| 838 This is exactly the same number of chars as UCS-4 handles, and it follows the | |
| 839 same property as UTF8 and Mule-internal: | |
| 840 | |
| 841 @enumerate | |
| 842 @item | |
| 843 There are two disjoint groupings of units, one representing leading units | |
| 844 and one representing non-leading units. | |
| 845 @item | |
| 846 Given a leading unit, you immediately know how many units follow to make | |
| 847 up a valid char, irrespective of any other context. | |
| 848 @end enumerate | |
| 849 | |
| 850 Note that A4xx is actually currently assigned to Yi. Since this is an | |
| 851 internal representation, we could just move these elsewhere. | |
| 852 | |
| 853 An alternative is to pick two disjoint ranges, e.g. 2D00 - 2DFF and | |
| 854 A500 - ABFF. | |
| 855 | |
| 856 ========================================================================== | |
| 857 New API for char->font mapping | |
| 858 ========================================================================== | |
| 859 - ; supersedes charset-registry and CCL; | |
| 860 supports all windows systems; powerful enough for Unicode; etc. | |
| 861 | |
| 862 (charset-font-mapping charset) | |
| 863 | |
| 864 font-mapping-specifier string | |
| 865 | |
| 866 char-font-mapping-table | |
| 867 | |
| 868 char-table, specifier; elements of char table are either strings (which | |
| 869 specify a registry or comparable font property, or vectors of a string | |
| 870 (same) followed by keyword-value pairs (optional). The only allowable | |
| 871 keyword currently is :ccl-program, which specifies a CCL program to map | |
| 872 the characters into font indices. Other keywords may be added | |
| 873 e.g. allowing Elisp fragments instead of CCL programs, also allowed is | |
| 874 [inherit], which inherits from the next less-specific char-table in the | |
| 875 specifier. | |
| 876 | |
| 877 The preferred interface onto this mapping (which should be portable | |
| 878 across Emacsen) is | |
| 879 | |
| 880 (set-char-font-mapping key value &optional locale tag-set how-to-add) | |
| 881 | |
| 882 where key is a char, range or charset (as for put-char-table), value is | |
| 883 as above, and the other arguments are standard for specifiers. This | |
| 884 automatically creates a char table in the locale, as necessary (all | |
| 885 elements default to [inherit]). On GNU Emacs, some specifiers arguments | |
| 886 may be unimplemented. | |
| 887 | |
| 888 (char-font-mapping key value &optional locale) | |
| 889 works vaguely like get-specifier? But does inheritance processing. | |
| 890 locale should clearly default here to current-buffer | |
| 891 | |
| 892 #### should get-specifier as well? Would make it work most like | |
| 893 #### buffer-local variables. | |
| 894 | |
| 895 NB. set-charset-registry and set-charset-ccl-program are obsoleted. | |
| 896 | |
| 897 ========================================================================== | |
| 898 Implementing fixed-width 8,16,32 bit buffer optimizations | |
| 899 ========================================================================== | |
| 900 | |
| 901 Add set-buffer-optimization (buffer &rest keywords) for | |
| 902 controlling these things. | |
| 903 | |
| 904 Also, put in hack so that correct arglist can be retrieved by | |
| 905 Lisp code. | |
| 906 | |
| 907 Look at the way keyword primitives are currently handled; make | |
| 908 sure it works and is documented, etc. | |
| 909 | |
| 910 Implement 8-bit fixed width optimization. Take the things that | |
| 911 know about the actual implementation and put them in a single | |
| 912 file, in essence creating an abstraction layer to allow | |
| 913 pluggable internal representations. Implement a fairly general | |
| 914 scheme for mapping between character codes in the 8 bits or 16 | |
| 915 bits representation and on actual charset characters. As part of | |
| 916 set-buffer-optimization, you can specify a list of character sets | |
| 917 to be used in the 8 bit to 16 bit, etc. world. You can also | |
| 918 request that the buffer be in 8, 16, etc. if possible. | |
| 919 | |
| 920 -> set defaults wrt this. | |
| 921 -> perhaps this should be just buffer properties. | |
| 922 -> this brings up the idea of default properties on an object. | |
| 923 -> Implement default-put, default-get, etc. | |
| 924 | |
| 925 What happens when a character not assigned in the range gets | |
| 926 added? Then, must convert to variable width of some sort. | |
| 927 | |
| 928 Note: at first, possibly we just convert whole hog to get things | |
| 929 right. Then we'd have to poy alternative to characters that got | |
| 930 added + deleted that were unassigned in the fixed width. When | |
| 931 this goes to zero and there's been enough time (heuristics), we | |
| 932 go back to fixed. | |
| 933 | |
| 934 Side note: We could dynamically build up the set of assigned | |
| 935 chars as they go. Conceivably this could even go down to the | |
| 936 single char level: Just keep a big array of mapping from 16 bit | |
| 937 values to chars, and add empty time, a char has been encountered | |
| 938 that wasn't there before. Problem need inverse mapping. | |
| 939 | |
| 940 -> Possibility; chars are actual objects, not just numbers. | |
| 941 Then you could keep track of such info in the chars itself. | |
| 942 *Think about this.* | |
| 943 | |
| 944 Eventually, we might consider allowing mixed fixed-width, | |
| 945 variable-width buffer encodings. Then, we use range tables to | |
| 946 indicate which sections are fixed and which variable and INC_CHAR does | |
| 947 something like this: binary search to find the current range, which | |
| 948 indicates whether it's fixed or variable, and tells us what the | |
| 949 increment is. We can cache this info and use it next time to speed | |
| 950 up. | |
| 951 | |
| 952 -> We will then have two partially shared range tables - one for | |
| 953 overall fixed width vs. variable width, and possibly one containing | |
| 954 this same info, but partitioning the variable width in one. Maybe | |
| 955 need fancier nested range table model. | |
| 956 | |
| 957 ========================================================================== | |
| 958 Expansion of display table and case mapping table support for all | |
| 959 chars, not just ASCII/Latin1. | |
| 960 ========================================================================== | |
| 961 | |
| 962 ========================================================================== | |
| 963 Improved flexibility for display tables, and evaluation of its | |
| 964 features to make sure it meshes with and complements the char<->font | |
| 965 mapping API mentioned earlier | |
| 966 ========================================================================== | |
| 967 | |
| 968 ========================================================================== | |
| 969 String access speedup: | |
| 970 ========================================================================== | |
| 971 | |
| 972 For strings larger than some size in bytes (10?), keep extra fields of | |
| 973 info: length in chars, and a (char, byte) pair in the middle to speed | |
| 974 up sequential access. | |
| 975 | |
| 976 (Better idea: do this for any size string, but only if it contains | |
| 977 non-ASCII chars. Then if info is missing, we know string is | |
| 978 ASCII-only.) | |
| 979 | |
| 980 Use a string-extra-info object, replacing string property slot and | |
| 981 containing fields for string mod tick, string extents, string props, | |
| 982 and string char length, and cached (char,byte) pair. | |
| 983 string-extra-info (or string-auxiliary?) objects could be in frob | |
| 984 blocks, esp. if creating frob blocks is easy + worth it. | |
| 985 | |
| 986 - Caching of char<->byte conversions in strings - should make nearly | |
| 987 all operations on strings O(N) | |
| 988 | |
| 989 ========================================================================== | |
| 990 Improvements in buffer char<->byte mapping | |
| 991 ========================================================================== | |
| 992 | |
| 993 - Range table implementation - especially when there are few runs of | |
| 994 different widths, e.g. recently converted from fixed-width | |
| 995 optimization to variable width | |
| 996 | |
| 997 Range Tables to speed up Bufpos <-> Bytind caching | |
| 998 ================================================== | |
| 999 | |
| 1000 This describes an alternative implementation using ranges. We | |
| 1001 maintain a range table of all spans of characters of a fixed width. | |
| 1002 Updating this table could take time if there are a large number of | |
| 1003 spans; but constant factors of operations should be quick. This method really wins | |
| 1004 when you have 8-bit buffers just converted to variable width, where | |
| 1005 there will be few spans. More specifically, lookup in this range | |
| 1006 table is O(log N) and can be done with simple binary search, which is | |
| 1007 very fast. If we maintain the ranges using a gap array, updating this | |
| 1008 table will be fast for local operations, which is most of the time. | |
| 1009 | |
| 1010 We will also provide (at first, at least) a Lisp function to set the | |
| 1011 caching mechanism explicitly - either range tables or the existing | |
| 1012 implementation. Eventually, we want to improve things, to the point | |
| 1013 where we automatically pick the right caching for the situation and | |
| 1014 have more caching schemes implemented. | |
| 1015 | |
| 1016 ========================================================================== | |
| 1017 - Robustify Text Properties | |
| 1018 ========================================================================== | |
| 1019 | |
| 1020 ========================================================================== | |
| 1021 Support for unified internal representation, e.g. Unicode | |
| 1022 ========================================================================== | |
| 1023 | |
| 1024 Start tagging all text with a language text property, | |
| 1025 indicating the current language environment when the text was input. | |
| 1026 (needs "Robustify Text Properties") | |
| 1027 | |
| 1028 ========================================================================== | |
| 1029 - Generalized Coding Systems | |
| 1030 ========================================================================== | |
| 1031 | |
| 1032 - Lisp API for Defining Coding Systems | |
| 1033 | |
| 1034 User-defined coding systems. | |
| 1035 | |
| 1036 (define-coding-system-type 'type | |
| 1037 :encode-function fun | |
| 1038 :decode-function fun | |
| 1039 :detect-function fun | |
| 1040 :buffering (number = at least this many chars | |
| 1041 line = buffer up to end of line | |
| 1042 regexp = buffer until this regexp is found in match | |
| 1043 source data. match data will be appropriate when fun is | |
| 1044 called | |
| 1045 | |
| 1046 encode fun is called as | |
| 1047 | |
| 1048 (encode instream outstream) | |
| 1049 | |
| 1050 should read data from instream and write converted result onto | |
| 1051 outstream. Can leave some data stuff in stream, it will reappear | |
| 1052 next time. Generally, there is a finite amount of data in instream | |
| 1053 and further attempts to read lead to would-block errors or retvals. | |
| 1054 Can use instream properties to record state. May use read-stream | |
| 1055 functionality to read everything into a vector or string. | |
| 1056 | |
| 1057 ->Need vectors + string exposed to resizing of Lisp implementation | |
| 1058 where necessary. | |
| 1059 | |
| 1060 ========================================================================== | |
| 1061 Support Windows Active Kbd Switching, Far East IME API (done already?) | |
| 1062 ========================================================================== | |
| 1063 | |
| 1064 ========================================================================== | |
| 1065 - UI/design changes for Coding System Pipelining | |
| 1066 ========================================================================== | |
| 1067 | |
| 1068 ------------------------------------------------------------------ | |
| 1069 CODING-SYSTEM CHAINS | |
| 1070 ------------------------------------------------------------------ | |
| 1071 | |
| 1072 sjt sez: | |
| 1073 | |
| 1074 There should be no elementary coding systems in the Lisp API, only | |
| 1075 chains. Chains should be declared, not computed, as a sequence of coding | |
| 1076 formats. (Probably the internal representation can be a vector for | |
| 1077 efficiency but programmers would probably rather work with lists.) A | |
| 1078 stream has a token type. Most streams are octet streams. Text is a | |
| 1079 stream of characters (in _internal_ format; a file on disk is not text!) | |
| 1080 An octet-stream has no implicit semantics, so its format must always be | |
| 1081 specified. The only type currently having semantics is characters. This | |
| 1082 means that the chain [euc-jp -> internal -> shift_jis) may be specified | |
| 1083 (euc-jp, shift_jis), and if no euc-jp -> shift_jis converter is | |
| 1084 available, then the chain is automatically constructed. (N.B. I f we | |
| 1085 have fixed width buffers in the future, then we could have ASCII -> 8-bit | |
| 1086 char -> 16-bit char -> ISO-2022-JP (with escape sequences). | |
| 1087 | |
| 1088 EOL handling is a char <-> char coding. It should not be part of another | |
| 1089 coding system except as a convenience for users. For text coding, | |
| 1090 automatically insert EOL handlers between char <-> octet boundaries. | |
| 1091 | |
| 1092 ------------------------------------------------------------------ | |
| 1093 ABOUT DETECTION | |
| 1094 ------------------------------------------------------------------ | |
| 1095 | |
| 1096 | |
| 1097 ------------------------------------------------------------------ | |
| 1098 EFFICIENCY OF CODING CONVERSION WITH MULTIPLE COPIES/CHAINS | |
| 1099 ------------------------------------------------------------------ | |
| 1100 | |
| 1101 A comment in encode_decode_coding_region(): | |
| 1102 | |
| 1103 The chain of streams looks like this: | |
| 1104 | |
| 1105 [BUFFER] <----- (( read from/send to loop )) | |
| 1106 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is | |
| 1107 in bytes] | |
| 1108 ------> [ENCODE/DECODE AS SPECIFIED] | |
| 1109 ------> [BYTE->CHAR i.e. DECODE AS BINARY | |
| 1110 if sink is in bytes] | |
| 1111 ------> [AUTODETECT EOL if | |
| 1112 we're decoding and | |
| 1113 coding system calls | |
| 1114 for this] | |
| 1115 ------> [BUFFER] | |
| 1116 | |
| 1117 sjt (?) responds: | |
| 1118 | |
| 1119 Of course, this is just horrible. BYTE<->CHAR should only be available | |
| 1120 to I/O routines. It should not be visible to Mule proper. | |
| 1121 | |
| 1122 A comment on the implementation. Hrvoje and Kyle worry about the | |
| 1123 inefficiency of repeated copying among buffers that chained coding | |
| 1124 systems entail. But this may not be as time inefficient as it appears | |
| 1125 in the Mule ("house rules") context. The issue is how do you do chain | |
| 1126 coding systems without copying? In theory you could have | |
| 1127 | |
| 1128 IChar external_to_raw (ExtChar *cp, State *s); | |
| 1129 IChar decode_utf16 (IChar c, State *s); | |
| 1130 IChar decode_crlf (ExtChar *cp, State *s); | |
| 1131 | |
| 1132 typedef Ichar (*Converter[]) (Ichar, State*); | |
| 1133 | |
| 1134 Converter utf16[2] = { &decode_utf16, &decode_crlf }; | |
| 1135 | |
| 1136 void convert (ExtChar *inbuf, IChar *outbuf, Converter cvtr) | |
| 1137 { | |
| 1138 int i; | |
| 1139 ExtChar c; | |
| 1140 State s; | |
| 1141 | |
| 1142 while (c = external_to_raw (*inbuf++, &s)) | |
| 1143 { | |
| 1144 for (i = 0; i < sizeof(cvtr)/sizeof(Converter); ++i) | |
| 1145 if (s.ready) | |
| 1146 c = (*cvtr[i]) (c, &s); | |
| 1147 } | |
| 1148 if (s.ready) | |
| 1149 *outbuf++ = c; | |
| 1150 } | |
| 1151 | |
| 1152 But this is a lot of function calls; what Ben is doing is basically | |
| 1153 reducing this to one call per buffer-full. The only way to avoid this | |
| 1154 is to hardcode all the "interesting" coding systems, maybe using | |
| 1155 inline or macros to give structure. But this is still a huge amount | |
| 1156 of work, and code. | |
| 1157 | |
| 1158 One advantage to the call-per-char approach is that we might be able | |
| 1159 to do something about the marker/extent destruction that coding | |
| 1160 normally entails. | |
| 1161 | |
| 1162 ben sez: | |
| 1163 | |
| 1164 it should be possible to preserve the markers/extents without | |
| 1165 switching completely to one-call-per-char -- we could at least do one | |
| 1166 call per "run", where a run is more or less the maximal stretch of | |
| 1167 text not overlapping any markers or extent boundaries. (It's a bit | |
| 1168 more complicated if we want to properly support the different extent | |
| 1169 begins/ends; in some cases we might have to pump a single character | |
| 1170 adjacent to where two extents meet.) The "stateless" way that I wrote | |
| 1171 all of the conversion routines may be a real hassle but it allows | |
| 1172 something like this to work without too much problem -- pump in one | |
| 1173 run at a time into one end of the chain, do a flush after each | |
| 1174 iteration, and stick what comes out the other end in its place. | |
| 1175 | |
| 1176 ------------------------------------------------------------------ | |
| 1177 ABOUT FORMATS | |
| 1178 ------------------------------------------------------------------ | |
| 1179 | |
| 1180 when calling make-coding-system, the name can be a cons of (format1 . | |
| 1181 format2), specifying that it decodes format1->format2 and encodes the other | |
| 1182 way. if only one name is given, that is assumed to be format1, and the | |
| 1183 other is either `external' or `internal' depending on the end type. | |
| 1184 normally the user when decoding gives the decoding order in formats, but | |
| 1185 can leave off the last one, `internal', which is assumed. a multichain | |
| 1186 might look like gzip|multibyte|unicode, using the coding systems named | |
| 1187 `gzip', `(unicode . multibyte)' and `unicode'. the way this actually works | |
| 1188 is by searching for gzip->multibyte; if not found, look for gzip->external | |
| 1189 or gzip->internal. (In general we automatically do conversion between | |
| 1190 internal and external as necessary: thus gzip|crlf does the expected, and | |
| 1191 maps to gzip->external, external->internal, crlf->internal, which when | |
| 1192 fully specified would be gzip|external:external|internal:crlf|internal -- | |
| 1193 see below.) To forcibly fit together two converters that have explicitly | |
| 1194 specified and incompatible names (say you have unicode->multibyte and | |
| 1195 iso8859-1->ebcdic and you know that the multibyte and iso8859-1 in this | |
| 1196 case are compatible), you can force-cast using :, like this: | |
| 1197 ebcdic|iso8859-1:multibyte|unicode. (again, if you force-cast between | |
| 1198 internal and external formats, the conversion happens automatically.) | |
| 1199 | |
| 1200 -------------------------------------------------------------------------- | |
| 1201 ABOUT PDUMP, UNICODE, AND RUNNING XEMACS FROM A DIRECTORY WITH WEIRD CHARS | |
| 1202 -------------------------------------------------------------------------- | |
| 1203 | |
| 1204 -- there's the problem that XEmacs can't be run in a directory with | |
| 1205 non-ASCII/Latin-1 chars in it, since it will be doing Unicode | |
| 1206 processing before we've had a chance to load the tables. In fact, | |
| 1207 even finding the tables in such a situation is problematic using | |
| 1208 the normal commands. my idea is to eventually load the stuff | |
| 1209 extremely extremely early, at the same time as the pdump data gets | |
| 1210 loaded. in fact, the unicode table data (stored in an efficient | |
| 1211 binary format) can even be stuck into the pdump file (which would | |
| 1212 mean as a resource to the executable, for windows). we'd need to | |
| 1213 extend pdump a bit: to allow for attaching extra data to the pdump | |
| 1214 file. (something like pdump_attach_extra_data (addr, length) | |
| 1215 returns a number of some sort, an index into the file, which you | |
| 1216 can then retrieve with pdump_load_extra_data(), which returns an | |
| 1217 addr (mmap()ed or loaded), and later you pdump_unload_extra_data() | |
| 1218 when finished. we'd probably also need | |
| 1219 pdump_attach_extra_data_append(), which appends data to the data | |
| 1220 just written out with pdump_attach_extra_data(). this way, | |
| 1221 multiple tables in memory can be written out into one contiguous | |
| 1222 table. (we'd use the tar-like trick of allowing new blocks to be | |
| 1223 written without going back to change the old blocks -- we just rely | |
| 1224 on the end of file/end of memory.) this same mechanism could be | |
| 1225 extracted out of pdump and used to handle the non-pdump situation | |
| 1226 (or alternatively, we could just dump either the memory image of | |
| 1227 the tables themselves or the compressed binary version). in the | |
| 1228 case of extra unicode tables not known about at compile time that | |
| 1229 get loaded before dumping, we either just dump them into the image | |
| 1230 (pdump and all) or extract them into the compressed binary format, | |
| 1231 free the original tables, and treat them like all other tables. | |
| 1232 | |
| 1233 | |
| 1234 ========================================================================== | |
| 1235 - Generalized language appropriate word wrapping (requires | |
| 1236 layout-exposing API defined in BIDI section) | |
| 1237 ========================================================================== | |
| 1238 | |
| 1239 ========================================================================== | |
| 1240 - Make Custom Mule-aware | |
| 1241 ========================================================================== | |
| 1242 | |
| 1243 ========================================================================== | |
| 1244 - Composite character support | |
| 1245 ========================================================================== | |
| 1246 | |
| 1247 ========================================================================== | |
| 1248 - Language appropriate sorting and searching | |
| 1249 ========================================================================== | |
| 1250 | |
| 1251 ========================================================================== | |
| 1252 - Glyph shaping for Arabic and Devanagari | |
| 1253 ========================================================================== | |
| 1254 | |
| 1255 - (needs to be handled mostly | |
| 1256 at C level, as part of layout; luckily it's entirely local in its | |
| 1257 changes, as this is not hard) | |
| 1258 | |
| 1259 | |
| 1260 ========================================================================== | |
| 1261 Consider moving language selection Menu up to be parallel with Mule menu | |
| 1262 ========================================================================== | |
| 1263 | |
| 1264 */ | |
| 1265 | |
| 1266 | |
| 771 | 1267 |
| 1268 /************************************************************************/ | |
| 1269 /* declarations */ | |
| 1270 /************************************************************************/ | |
| 1271 | |
| 1272 Eistring the_eistring_zero_init, the_eistring_malloc_zero_init; | |
| 1273 | |
| 1274 #define MAX_CHARBPOS_GAP_SIZE_3 (65535/3) | |
| 1275 #define MAX_BYTEBPOS_GAP_SIZE_3 (3 * MAX_CHARBPOS_GAP_SIZE_3) | |
| 1276 | |
| 1277 short three_to_one_table[1 + MAX_BYTEBPOS_GAP_SIZE_3]; | |
| 1278 | |
| 1279 #ifdef MULE | |
| 1280 | |
| 1281 /* Table of number of bytes in the string representation of a character | |
| 1282 indexed by the first byte of that representation. | |
| 1283 | |
| 1284 rep_bytes_by_first_byte(c) is more efficient than the equivalent | |
| 1285 canonical computation: | |
| 1286 | |
| 826 | 1287 XCHARSET_REP_BYTES (charset_by_leading_byte (c)) */ |
| 771 | 1288 |
| 1289 const Bytecount rep_bytes_by_first_byte[0xA0] = | |
| 1290 { /* 0x00 - 0x7f are for straight ASCII */ | |
| 1291 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1292 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1293 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1294 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1295 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1296 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1297 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1298 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1299 /* 0x80 - 0x8f are for Dimension-1 official charsets */ | |
| 1300 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, | |
| 1301 /* 0x90 - 0x9d are for Dimension-2 official charsets */ | |
| 1302 /* 0x9e is for Dimension-1 private charsets */ | |
| 1303 /* 0x9f is for Dimension-2 private charsets */ | |
| 1304 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4 | |
| 1305 }; | |
| 1306 | |
| 1307 #ifdef ENABLE_COMPOSITE_CHARS | |
| 1308 | |
| 1309 /* Hash tables for composite chars. One maps string representing | |
| 1310 composed chars to their equivalent chars; one goes the | |
| 1311 other way. */ | |
| 1312 Lisp_Object Vcomposite_char_char2string_hash_table; | |
| 1313 Lisp_Object Vcomposite_char_string2char_hash_table; | |
| 1314 | |
| 1315 static int composite_char_row_next; | |
| 1316 static int composite_char_col_next; | |
| 1317 | |
| 1318 #endif /* ENABLE_COMPOSITE_CHARS */ | |
| 1319 | |
| 1320 #endif /* MULE */ | |
| 1321 | |
| 1292 | 1322 Lisp_Object QSin_char_byte_conversion; |
| 1323 Lisp_Object QSin_internal_external_conversion; | |
| 1324 | |
| 771 | 1325 |
| 1326 /************************************************************************/ | |
| 1327 /* qxestr***() functions */ | |
| 1328 /************************************************************************/ | |
| 1329 | |
| 1330 /* Most are inline functions in lisp.h */ | |
| 1331 | |
| 1332 int | |
| 867 | 1333 qxesprintf (Ibyte *buffer, const CIbyte *format, ...) |
| 771 | 1334 { |
| 1335 va_list args; | |
| 1336 int retval; | |
| 1337 | |
| 1338 va_start (args, format); | |
| 2367 | 1339 retval = vsprintf ((Chbyte *) buffer, format, args); |
| 771 | 1340 va_end (args); |
| 1341 | |
| 1342 return retval; | |
| 1343 } | |
| 1344 | |
| 1345 /* strcasecmp() implementation from BSD */ | |
| 867 | 1346 static Ibyte strcasecmp_charmap[] = { |
| 1429 | 1347 0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007, |
| 1348 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017, | |
| 1349 0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027, | |
| 1350 0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037, | |
| 1351 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047, | |
| 1352 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057, | |
| 1353 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, | |
| 1354 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077, | |
| 1355 0100, 0141, 0142, 0143, 0144, 0145, 0146, 0147, | |
| 1356 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157, | |
| 1357 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167, | |
| 1358 0170, 0171, 0172, 0133, 0134, 0135, 0136, 0137, | |
| 1359 0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147, | |
| 1360 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157, | |
| 1361 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167, | |
| 1362 0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177, | |
| 1363 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207, | |
| 1364 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217, | |
| 1365 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227, | |
| 1366 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237, | |
| 1367 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247, | |
| 1368 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257, | |
| 1369 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267, | |
| 1370 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277, | |
| 1371 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307, | |
| 1372 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317, | |
| 1373 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327, | |
| 1374 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337, | |
| 1375 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347, | |
| 1376 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357, | |
| 1377 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367, | |
| 1378 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377 | |
| 771 | 1379 }; |
| 1380 | |
| 1381 /* A version that works like generic strcasecmp() -- only collapsing | |
| 1382 case in ASCII A-Z/a-z. This is safe on Mule strings due to the | |
| 1383 current representation. | |
| 1384 | |
| 1385 This version was written by some Berkeley coder, favoring | |
| 1386 nanosecond improvements over clarity. In all other versions below, | |
| 1387 we use symmetrical algorithms that may sacrifice a few machine | |
| 1388 cycles but are MUCH MUCH clearer, which counts a lot more. | |
| 1389 */ | |
| 1390 | |
| 1391 int | |
| 867 | 1392 qxestrcasecmp (const Ibyte *s1, const Ibyte *s2) |
| 771 | 1393 { |
| 867 | 1394 Ibyte *cm = strcasecmp_charmap; |
| 771 | 1395 |
| 1396 while (cm[*s1] == cm[*s2++]) | |
| 1397 if (*s1++ == '\0') | |
| 1398 return (0); | |
| 1399 | |
| 1400 return (cm[*s1] - cm[*--s2]); | |
| 1401 } | |
| 1402 | |
| 1403 int | |
| 2367 | 1404 ascii_strcasecmp (const Ascbyte *s1, const Ascbyte *s2) |
| 771 | 1405 { |
| 867 | 1406 return qxestrcasecmp ((const Ibyte *) s1, (const Ibyte *) s2); |
| 771 | 1407 } |
| 1408 | |
| 1409 int | |
| 2367 | 1410 qxestrcasecmp_ascii (const Ibyte *s1, const Ascbyte *s2) |
| 771 | 1411 { |
| 867 | 1412 return qxestrcasecmp (s1, (const Ibyte *) s2); |
| 771 | 1413 } |
| 1414 | |
| 1415 /* An internationalized version that collapses case in a general fashion. | |
| 1416 */ | |
| 1417 | |
| 1418 int | |
| 867 | 1419 qxestrcasecmp_i18n (const Ibyte *s1, const Ibyte *s2) |
| 771 | 1420 { |
| 1421 while (*s1 && *s2) | |
| 1422 { | |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1423 if (CANONCASE (0, itext_ichar (s1)) != |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1424 CANONCASE (0, itext_ichar (s2))) |
| 771 | 1425 break; |
| 867 | 1426 INC_IBYTEPTR (s1); |
| 1427 INC_IBYTEPTR (s2); | |
| 771 | 1428 } |
| 1429 | |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1430 return (CANONCASE (0, itext_ichar (s1)) - |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1431 CANONCASE (0, itext_ichar (s2))); |
| 771 | 1432 } |
| 1433 | |
| 1434 /* The only difference between these next two and | |
| 1435 qxememcasecmp()/qxememcasecmp_i18n() is that these two will stop if | |
| 1436 both strings are equal and less than LEN in length, while | |
| 1437 the mem...() versions would would run off the end. */ | |
| 1438 | |
| 1439 int | |
| 867 | 1440 qxestrncasecmp (const Ibyte *s1, const Ibyte *s2, Bytecount len) |
| 771 | 1441 { |
| 867 | 1442 Ibyte *cm = strcasecmp_charmap; |
| 771 | 1443 |
| 1444 while (len--) | |
| 1445 { | |
| 1446 int diff = cm[*s1] - cm[*s2]; | |
| 1447 if (diff != 0) | |
| 1448 return diff; | |
| 1449 if (!*s1) | |
| 1450 return 0; | |
| 1451 s1++, s2++; | |
| 1452 } | |
| 1453 | |
| 1454 return 0; | |
| 1455 } | |
| 1456 | |
| 1457 int | |
| 2367 | 1458 ascii_strncasecmp (const Ascbyte *s1, const Ascbyte *s2, Bytecount len) |
| 771 | 1459 { |
| 867 | 1460 return qxestrncasecmp ((const Ibyte *) s1, (const Ibyte *) s2, len); |
| 771 | 1461 } |
| 1462 | |
| 1463 int | |
| 2367 | 1464 qxestrncasecmp_ascii (const Ibyte *s1, const Ascbyte *s2, Bytecount len) |
| 771 | 1465 { |
| 867 | 1466 return qxestrncasecmp (s1, (const Ibyte *) s2, len); |
| 771 | 1467 } |
| 1468 | |
| 801 | 1469 /* Compare LEN_FROM_S1 worth of characters from S1 with the same number of |
| 1470 characters from S2, case insensitive. NOTE: Downcasing can convert | |
| 1471 characters from one length in bytes to another, so reversing S1 and S2 | |
| 1472 is *NOT* a symmetric operations! You must choose a length that agrees | |
| 1473 with S1. */ | |
| 1474 | |
| 771 | 1475 int |
| 867 | 1476 qxestrncasecmp_i18n (const Ibyte *s1, const Ibyte *s2, |
| 801 | 1477 Bytecount len_from_s1) |
| 771 | 1478 { |
| 801 | 1479 while (len_from_s1 > 0) |
| 771 | 1480 { |
| 867 | 1481 const Ibyte *old_s1 = s1; |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1482 int diff = (CANONCASE (0, itext_ichar (s1)) - |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1483 CANONCASE (0, itext_ichar (s2))); |
| 771 | 1484 if (diff != 0) |
| 1485 return diff; | |
| 1486 if (!*s1) | |
| 1487 return 0; | |
| 867 | 1488 INC_IBYTEPTR (s1); |
| 1489 INC_IBYTEPTR (s2); | |
| 801 | 1490 len_from_s1 -= s1 - old_s1; |
| 771 | 1491 } |
| 1492 | |
| 1493 return 0; | |
| 1494 } | |
| 1495 | |
| 1496 int | |
| 867 | 1497 qxememcmp (const Ibyte *s1, const Ibyte *s2, Bytecount len) |
| 771 | 1498 { |
| 1499 return memcmp (s1, s2, len); | |
| 1500 } | |
| 1501 | |
| 1502 int | |
| 867 | 1503 qxememcmp4 (const Ibyte *s1, Bytecount len1, |
| 1504 const Ibyte *s2, Bytecount len2) | |
| 801 | 1505 { |
| 1506 int retval = qxememcmp (s1, s2, min (len1, len2)); | |
| 1507 if (retval) | |
| 1508 return retval; | |
| 1509 return len1 - len2; | |
| 1510 } | |
| 1511 | |
| 1512 int | |
| 867 | 1513 qxememcasecmp (const Ibyte *s1, const Ibyte *s2, Bytecount len) |
| 771 | 1514 { |
| 867 | 1515 Ibyte *cm = strcasecmp_charmap; |
| 771 | 1516 |
| 1517 while (len--) | |
| 1518 { | |
| 1519 int diff = cm[*s1] - cm[*s2]; | |
| 1520 if (diff != 0) | |
| 1521 return diff; | |
| 1522 s1++, s2++; | |
| 1523 } | |
| 1524 | |
| 1525 return 0; | |
| 1526 } | |
| 1527 | |
| 1528 int | |
| 867 | 1529 qxememcasecmp4 (const Ibyte *s1, Bytecount len1, |
| 1530 const Ibyte *s2, Bytecount len2) | |
| 771 | 1531 { |
| 801 | 1532 int retval = qxememcasecmp (s1, s2, min (len1, len2)); |
| 1533 if (retval) | |
| 1534 return retval; | |
| 1535 return len1 - len2; | |
| 1536 } | |
| 1537 | |
| 1538 /* Do a character-by-character comparison, returning "which is greater" by | |
| 867 | 1539 comparing the Ichar values. (#### Should have option to compare Unicode |
| 801 | 1540 points) */ |
| 1541 | |
| 1542 int | |
| 867 | 1543 qxetextcmp (const Ibyte *s1, Bytecount len1, |
| 1544 const Ibyte *s2, Bytecount len2) | |
| 801 | 1545 { |
| 1546 while (len1 > 0 && len2 > 0) | |
| 771 | 1547 { |
| 867 | 1548 const Ibyte *old_s1 = s1; |
| 1549 const Ibyte *old_s2 = s2; | |
| 1550 int diff = itext_ichar (s1) - itext_ichar (s2); | |
| 801 | 1551 if (diff != 0) |
| 1552 return diff; | |
| 867 | 1553 INC_IBYTEPTR (s1); |
| 1554 INC_IBYTEPTR (s2); | |
| 801 | 1555 len1 -= s1 - old_s1; |
| 1556 len2 -= s2 - old_s2; | |
| 1557 } | |
| 1558 | |
| 1559 assert (len1 >= 0 && len2 >= 0); | |
| 1560 return len1 - len2; | |
| 1561 } | |
| 1562 | |
| 1563 int | |
| 867 | 1564 qxetextcmp_matching (const Ibyte *s1, Bytecount len1, |
| 1565 const Ibyte *s2, Bytecount len2, | |
| 801 | 1566 Charcount *matching) |
| 1567 { | |
| 1568 *matching = 0; | |
| 1569 while (len1 > 0 && len2 > 0) | |
| 1570 { | |
| 867 | 1571 const Ibyte *old_s1 = s1; |
| 1572 const Ibyte *old_s2 = s2; | |
| 1573 int diff = itext_ichar (s1) - itext_ichar (s2); | |
| 801 | 1574 if (diff != 0) |
| 1575 return diff; | |
| 867 | 1576 INC_IBYTEPTR (s1); |
| 1577 INC_IBYTEPTR (s2); | |
| 801 | 1578 len1 -= s1 - old_s1; |
| 1579 len2 -= s2 - old_s2; | |
| 1580 (*matching)++; | |
| 1581 } | |
| 1582 | |
| 1583 assert (len1 >= 0 && len2 >= 0); | |
| 1584 return len1 - len2; | |
| 1585 } | |
| 1586 | |
| 1587 /* Do a character-by-character comparison, returning "which is greater" by | |
| 867 | 1588 comparing the Ichar values, case insensitively (by downcasing both |
| 801 | 1589 first). (#### Should have option to compare Unicode points) |
| 1590 | |
| 1591 In this case, both lengths must be specified becaused downcasing can | |
| 1592 convert characters from one length in bytes to another; therefore, two | |
| 1593 blocks of text of different length might be equal. If both compare | |
| 1594 equal up to the limit in length of one but not the other, the longer one | |
| 1595 is "greater". */ | |
| 1596 | |
| 1597 int | |
| 867 | 1598 qxetextcasecmp (const Ibyte *s1, Bytecount len1, |
| 1599 const Ibyte *s2, Bytecount len2) | |
| 801 | 1600 { |
| 1601 while (len1 > 0 && len2 > 0) | |
| 1602 { | |
| 867 | 1603 const Ibyte *old_s1 = s1; |
| 1604 const Ibyte *old_s2 = s2; | |
|
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Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
1605 int diff = (CANONCASE (0, itext_ichar (s1)) - |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1606 CANONCASE (0, itext_ichar (s2))); |
| 771 | 1607 if (diff != 0) |
| 1608 return diff; | |
| 867 | 1609 INC_IBYTEPTR (s1); |
| 1610 INC_IBYTEPTR (s2); | |
| 801 | 1611 len1 -= s1 - old_s1; |
| 1612 len2 -= s2 - old_s2; | |
| 771 | 1613 } |
| 1614 | |
| 801 | 1615 assert (len1 >= 0 && len2 >= 0); |
| 1616 return len1 - len2; | |
| 1617 } | |
| 1618 | |
| 1619 /* Like qxetextcasecmp() but also return number of characters at | |
| 1620 beginning that match. */ | |
| 1621 | |
| 1622 int | |
| 867 | 1623 qxetextcasecmp_matching (const Ibyte *s1, Bytecount len1, |
| 1624 const Ibyte *s2, Bytecount len2, | |
| 801 | 1625 Charcount *matching) |
| 1626 { | |
| 1627 *matching = 0; | |
| 1628 while (len1 > 0 && len2 > 0) | |
| 1629 { | |
| 867 | 1630 const Ibyte *old_s1 = s1; |
| 1631 const Ibyte *old_s2 = s2; | |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1632 int diff = (CANONCASE (0, itext_ichar (s1)) - |
|
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1633 CANONCASE (0, itext_ichar (s2))); |
| 801 | 1634 if (diff != 0) |
| 1635 return diff; | |
| 867 | 1636 INC_IBYTEPTR (s1); |
| 1637 INC_IBYTEPTR (s2); | |
| 801 | 1638 len1 -= s1 - old_s1; |
| 1639 len2 -= s2 - old_s2; | |
| 1640 (*matching)++; | |
| 1641 } | |
| 1642 | |
| 1643 assert (len1 >= 0 && len2 >= 0); | |
| 1644 return len1 - len2; | |
| 771 | 1645 } |
| 1646 | |
| 1647 int | |
|
4906
6ef8256a020a
implement equalp in C, fix case-folding, add equal() method for keymaps
Ben Wing <ben@xemacs.org>
parents:
4526
diff
changeset
|
1648 lisp_strcasecmp_ascii (Lisp_Object s1, Lisp_Object s2) |
| 771 | 1649 { |
| 867 | 1650 Ibyte *cm = strcasecmp_charmap; |
| 1651 Ibyte *p1 = XSTRING_DATA (s1); | |
| 1652 Ibyte *p2 = XSTRING_DATA (s2); | |
| 1653 Ibyte *e1 = p1 + XSTRING_LENGTH (s1); | |
| 1654 Ibyte *e2 = p2 + XSTRING_LENGTH (s2); | |
| 771 | 1655 |
| 1656 /* again, we use a symmetric algorithm and favor clarity over | |
| 1657 nanosecond improvements. */ | |
| 1658 while (1) | |
| 1659 { | |
| 1660 /* if we reached the end of either string, compare lengths. | |
| 1661 do NOT compare the final null byte against anything, in case | |
| 1662 the other string also has a null byte at that position. */ | |
| 1663 if (p1 == e1 || p2 == e2) | |
| 1664 return e1 - e2; | |
| 1665 if (cm[*p1] != cm[*p2]) | |
| 1666 return cm[*p1] - cm[*p2]; | |
| 1667 p1++, p2++; | |
| 1668 } | |
| 1669 } | |
| 1670 | |
| 1671 int | |
| 1672 lisp_strcasecmp_i18n (Lisp_Object s1, Lisp_Object s2) | |
| 1673 { | |
| 801 | 1674 return qxetextcasecmp (XSTRING_DATA (s1), XSTRING_LENGTH (s1), |
| 1675 XSTRING_DATA (s2), XSTRING_LENGTH (s2)); | |
| 771 | 1676 } |
| 1677 | |
| 2367 | 1678 /* Compare a wide string with an ASCII string */ |
| 1679 | |
| 1680 int | |
| 1681 wcscmp_ascii (const wchar_t *s1, const Ascbyte *s2) | |
| 1682 { | |
| 1683 while (*s1 && *s2) | |
| 1684 { | |
| 2956 | 1685 if (*s1 != (wchar_t) *s2) |
| 2367 | 1686 break; |
| 1687 s1++, s2++; | |
| 1688 } | |
| 1689 | |
| 1690 return *s1 - *s2; | |
| 1691 } | |
| 1692 | |
| 1693 int | |
| 1694 wcsncmp_ascii (const wchar_t *s1, const Ascbyte *s2, Charcount len) | |
| 1695 { | |
| 1696 while (len--) | |
| 1697 { | |
| 1698 int diff = *s1 - *s2; | |
| 1699 if (diff != 0) | |
| 1700 return diff; | |
| 1701 if (!*s1) | |
| 1702 return 0; | |
| 1703 s1++, s2++; | |
| 1704 } | |
| 1705 | |
| 1706 return 0; | |
| 1707 } | |
| 1708 | |
| 771 | 1709 |
| 1710 /************************************************************************/ | |
| 1711 /* conversion between textual representations */ | |
| 1712 /************************************************************************/ | |
| 1713 | |
| 1714 /* NOTE: Does not reset the Dynarr. */ | |
| 1715 | |
| 1716 void | |
| 867 | 1717 convert_ibyte_string_into_ichar_dynarr (const Ibyte *str, Bytecount len, |
| 2367 | 1718 Ichar_dynarr *dyn) |
| 771 | 1719 { |
| 867 | 1720 const Ibyte *strend = str + len; |
| 771 | 1721 |
| 1722 while (str < strend) | |
| 1723 { | |
| 867 | 1724 Ichar ch = itext_ichar (str); |
| 771 | 1725 Dynarr_add (dyn, ch); |
| 867 | 1726 INC_IBYTEPTR (str); |
| 771 | 1727 } |
| 1728 } | |
| 1729 | |
| 1730 Charcount | |
| 867 | 1731 convert_ibyte_string_into_ichar_string (const Ibyte *str, Bytecount len, |
| 2367 | 1732 Ichar *arr) |
| 771 | 1733 { |
| 867 | 1734 const Ibyte *strend = str + len; |
| 771 | 1735 Charcount newlen = 0; |
| 1736 while (str < strend) | |
| 1737 { | |
| 867 | 1738 Ichar ch = itext_ichar (str); |
| 771 | 1739 arr[newlen++] = ch; |
| 867 | 1740 INC_IBYTEPTR (str); |
| 771 | 1741 } |
| 1742 return newlen; | |
| 1743 } | |
| 1744 | |
| 867 | 1745 /* Convert an array of Ichars into the equivalent string representation. |
| 1746 Store into the given Ibyte dynarr. Does not reset the dynarr. | |
| 771 | 1747 Does not add a terminating zero. */ |
| 1748 | |
| 1749 void | |
| 867 | 1750 convert_ichar_string_into_ibyte_dynarr (Ichar *arr, int nels, |
| 1751 Ibyte_dynarr *dyn) | |
| 771 | 1752 { |
| 867 | 1753 Ibyte str[MAX_ICHAR_LEN]; |
| 771 | 1754 int i; |
| 1755 | |
| 1756 for (i = 0; i < nels; i++) | |
| 1757 { | |
| 867 | 1758 Bytecount len = set_itext_ichar (str, arr[i]); |
| 771 | 1759 Dynarr_add_many (dyn, str, len); |
| 1760 } | |
| 1761 } | |
| 1762 | |
| 867 | 1763 /* Convert an array of Ichars into the equivalent string representation. |
| 771 | 1764 Malloc the space needed for this and return it. If LEN_OUT is not a |
| 867 | 1765 NULL pointer, store into LEN_OUT the number of Ibytes in the |
| 1766 malloc()ed string. Note that the actual number of Ibytes allocated | |
| 771 | 1767 is one more than this: the returned string is zero-terminated. */ |
| 1768 | |
| 867 | 1769 Ibyte * |
| 1770 convert_ichar_string_into_malloced_string (Ichar *arr, int nels, | |
| 826 | 1771 Bytecount *len_out) |
| 771 | 1772 { |
| 1773 /* Damn zero-termination. */ | |
| 2367 | 1774 Ibyte *str = alloca_ibytes (nels * MAX_ICHAR_LEN + 1); |
| 867 | 1775 Ibyte *strorig = str; |
| 771 | 1776 Bytecount len; |
| 1777 | |
| 1778 int i; | |
| 1779 | |
| 1780 for (i = 0; i < nels; i++) | |
| 867 | 1781 str += set_itext_ichar (str, arr[i]); |
| 771 | 1782 *str = '\0'; |
| 1783 len = str - strorig; | |
| 2367 | 1784 str = xnew_ibytes (1 + len); |
| 771 | 1785 memcpy (str, strorig, 1 + len); |
| 1786 if (len_out) | |
| 1787 *len_out = len; | |
| 1788 return str; | |
| 1789 } | |
| 1790 | |
| 826 | 1791 #define COPY_TEXT_BETWEEN_FORMATS(srcfmt, dstfmt) \ |
| 1792 do \ | |
| 1793 { \ | |
| 1794 if (dst) \ | |
| 1795 { \ | |
| 867 | 1796 Ibyte *dstend = dst + dstlen; \ |
| 1797 Ibyte *dstp = dst; \ | |
| 1798 const Ibyte *srcend = src + srclen; \ | |
| 1799 const Ibyte *srcp = src; \ | |
| 826 | 1800 \ |
| 1801 while (srcp < srcend) \ | |
| 1802 { \ | |
| 867 | 1803 Ichar ch = itext_ichar_fmt (srcp, srcfmt, srcobj); \ |
| 1804 Bytecount len = ichar_len_fmt (ch, dstfmt); \ | |
| 826 | 1805 \ |
| 1806 if (dstp + len <= dstend) \ | |
| 1807 { \ | |
| 2956 | 1808 (void) set_itext_ichar_fmt (dstp, ch, dstfmt, dstobj); \ |
| 826 | 1809 dstp += len; \ |
| 1810 } \ | |
| 1811 else \ | |
| 1812 break; \ | |
| 867 | 1813 INC_IBYTEPTR_FMT (srcp, srcfmt); \ |
| 826 | 1814 } \ |
| 1815 text_checking_assert (srcp <= srcend); \ | |
| 1816 if (src_used) \ | |
| 1817 *src_used = srcp - src; \ | |
| 1818 return dstp - dst; \ | |
| 1819 } \ | |
| 1820 else \ | |
| 1821 { \ | |
| 867 | 1822 const Ibyte *srcend = src + srclen; \ |
| 1823 const Ibyte *srcp = src; \ | |
| 826 | 1824 Bytecount total = 0; \ |
| 1825 \ | |
| 1826 while (srcp < srcend) \ | |
| 1827 { \ | |
| 867 | 1828 total += ichar_len_fmt (itext_ichar_fmt (srcp, srcfmt, \ |
| 826 | 1829 srcobj), dstfmt); \ |
| 867 | 1830 INC_IBYTEPTR_FMT (srcp, srcfmt); \ |
| 826 | 1831 } \ |
| 1832 text_checking_assert (srcp == srcend); \ | |
| 1833 if (src_used) \ | |
| 1834 *src_used = srcp - src; \ | |
| 1835 return total; \ | |
| 1836 } \ | |
| 1837 } \ | |
| 1838 while (0) | |
| 1839 | |
| 1840 /* Copy as much text from SRC/SRCLEN to DST/DSTLEN as will fit, converting | |
| 1841 from SRCFMT/SRCOBJ to DSTFMT/DSTOBJ. Return number of bytes stored into | |
| 1842 DST as return value, and number of bytes copied from SRC through | |
| 1843 SRC_USED (if not NULL). If DST is NULL, don't actually store anything | |
| 1844 and just return the size needed to store all the text. Will not copy | |
| 1845 partial characters into DST. */ | |
| 1846 | |
| 1847 Bytecount | |
| 867 | 1848 copy_text_between_formats (const Ibyte *src, Bytecount srclen, |
| 826 | 1849 Internal_Format srcfmt, |
| 2333 | 1850 Lisp_Object USED_IF_MULE (srcobj), |
| 867 | 1851 Ibyte *dst, Bytecount dstlen, |
| 826 | 1852 Internal_Format dstfmt, |
| 2333 | 1853 Lisp_Object USED_IF_MULE (dstobj), |
| 826 | 1854 Bytecount *src_used) |
| 1855 { | |
| 1856 if (srcfmt == dstfmt && | |
| 1857 objects_have_same_internal_representation (srcobj, dstobj)) | |
| 1858 { | |
| 1859 if (dst) | |
| 1860 { | |
| 1861 srclen = min (srclen, dstlen); | |
| 867 | 1862 srclen = validate_ibyte_string_backward (src, srclen); |
| 826 | 1863 memcpy (dst, src, srclen); |
| 1864 if (src_used) | |
| 1865 *src_used = srclen; | |
| 1866 return srclen; | |
| 1867 } | |
| 1868 else | |
| 1869 return srclen; | |
| 1870 } | |
| 1871 /* Everything before the final else statement is an optimization. | |
| 1872 The inner loops inside COPY_TEXT_BETWEEN_FORMATS() have a number | |
| 1873 of calls to *_fmt(), each of which has a switch statement in it. | |
| 1874 By using constants as the FMT argument, these switch statements | |
| 1875 will be optimized out of existence. */ | |
| 1876 #define ELSE_FORMATS(fmt1, fmt2) \ | |
| 1877 else if (srcfmt == fmt1 && dstfmt == fmt2) \ | |
| 1878 COPY_TEXT_BETWEEN_FORMATS (fmt1, fmt2) | |
| 1879 ELSE_FORMATS (FORMAT_DEFAULT, FORMAT_8_BIT_FIXED); | |
| 1880 ELSE_FORMATS (FORMAT_8_BIT_FIXED, FORMAT_DEFAULT); | |
| 1881 ELSE_FORMATS (FORMAT_DEFAULT, FORMAT_32_BIT_FIXED); | |
| 1882 ELSE_FORMATS (FORMAT_32_BIT_FIXED, FORMAT_DEFAULT); | |
| 1883 else | |
| 1884 COPY_TEXT_BETWEEN_FORMATS (srcfmt, dstfmt); | |
| 1885 #undef ELSE_FORMATS | |
| 1886 } | |
| 1887 | |
| 1888 /* Copy as much buffer text in BUF, starting at POS, of length LEN, as will | |
| 1889 fit into DST/DSTLEN, converting to DSTFMT. Return number of bytes | |
| 1890 stored into DST as return value, and number of bytes copied from BUF | |
| 1891 through SRC_USED (if not NULL). If DST is NULL, don't actually store | |
| 1892 anything and just return the size needed to store all the text. */ | |
| 1893 | |
| 1894 Bytecount | |
| 1895 copy_buffer_text_out (struct buffer *buf, Bytebpos pos, | |
| 867 | 1896 Bytecount len, Ibyte *dst, Bytecount dstlen, |
| 826 | 1897 Internal_Format dstfmt, Lisp_Object dstobj, |
| 1898 Bytecount *src_used) | |
| 1899 { | |
| 1900 Bytecount dst_used = 0; | |
| 1901 if (src_used) | |
| 1902 *src_used = 0; | |
| 1903 | |
| 1904 { | |
| 1905 BUFFER_TEXT_LOOP (buf, pos, len, runptr, runlen) | |
| 1906 { | |
| 1907 Bytecount the_src_used, the_dst_used; | |
| 1908 | |
| 1909 the_dst_used = copy_text_between_formats (runptr, runlen, | |
| 1910 BUF_FORMAT (buf), | |
| 1911 wrap_buffer (buf), | |
| 1912 dst, dstlen, dstfmt, | |
| 1913 dstobj, &the_src_used); | |
| 1914 dst_used += the_dst_used; | |
| 1915 if (src_used) | |
| 1916 *src_used += the_src_used; | |
| 1917 if (dst) | |
| 1918 { | |
| 1919 dst += the_dst_used; | |
| 1920 dstlen -= the_dst_used; | |
| 841 | 1921 /* Stop if we didn't use all of the source text. Also stop |
| 1922 if the destination is full. We need the first test because | |
| 1923 there might be a couple bytes left in the destination, but | |
| 1924 not enough to fit a full character. The first test will in | |
| 1925 fact catch the vast majority of cases where the destination | |
| 1926 is empty, too -- but in case the destination holds *exactly* | |
| 1927 the run length, we put in the second check. (It shouldn't | |
| 1928 really matter though -- next time through we'll just get a | |
| 1929 0.) */ | |
| 1930 if (the_src_used < runlen || !dstlen) | |
| 826 | 1931 break; |
| 1932 } | |
| 1933 } | |
| 1934 } | |
| 1935 | |
| 1936 return dst_used; | |
| 1937 } | |
| 1938 | |
| 771 | 1939 |
| 1940 /************************************************************************/ | |
| 1941 /* charset properties of strings */ | |
| 1942 /************************************************************************/ | |
| 1943 | |
| 1944 void | |
| 2333 | 1945 find_charsets_in_ibyte_string (unsigned char *charsets, |
| 1946 const Ibyte *USED_IF_MULE (str), | |
| 1947 Bytecount USED_IF_MULE (len)) | |
| 771 | 1948 { |
| 1949 #ifndef MULE | |
| 1950 /* Telescope this. */ | |
| 1951 charsets[0] = 1; | |
| 1952 #else | |
| 867 | 1953 const Ibyte *strend = str + len; |
| 771 | 1954 memset (charsets, 0, NUM_LEADING_BYTES); |
| 1955 | |
| 1956 /* #### SJT doesn't like this. */ | |
| 1957 if (len == 0) | |
| 1958 { | |
| 1959 charsets[XCHARSET_LEADING_BYTE (Vcharset_ascii) - MIN_LEADING_BYTE] = 1; | |
| 1960 return; | |
| 1961 } | |
| 1962 | |
| 1963 while (str < strend) | |
| 1964 { | |
| 867 | 1965 charsets[ichar_leading_byte (itext_ichar (str)) - MIN_LEADING_BYTE] = |
| 771 | 1966 1; |
| 867 | 1967 INC_IBYTEPTR (str); |
| 771 | 1968 } |
| 1969 #endif | |
| 1970 } | |
| 1971 | |
| 1972 void | |
| 2333 | 1973 find_charsets_in_ichar_string (unsigned char *charsets, |
| 1974 const Ichar *USED_IF_MULE (str), | |
| 1975 Charcount USED_IF_MULE (len)) | |
| 771 | 1976 { |
| 1977 #ifndef MULE | |
| 1978 /* Telescope this. */ | |
| 1979 charsets[0] = 1; | |
| 1980 #else | |
| 1981 int i; | |
| 1982 | |
| 1983 memset (charsets, 0, NUM_LEADING_BYTES); | |
| 1984 | |
| 1985 /* #### SJT doesn't like this. */ | |
| 1986 if (len == 0) | |
| 1987 { | |
| 1988 charsets[XCHARSET_LEADING_BYTE (Vcharset_ascii) - MIN_LEADING_BYTE] = 1; | |
| 1989 return; | |
| 1990 } | |
| 1991 | |
| 1992 for (i = 0; i < len; i++) | |
| 1993 { | |
| 867 | 1994 charsets[ichar_leading_byte (str[i]) - MIN_LEADING_BYTE] = 1; |
| 771 | 1995 } |
| 1996 #endif | |
| 1997 } | |
| 1998 | |
| 3571 | 1999 /* A couple of these functions should only be called on a non-Mule build. */ |
| 2000 #ifdef MULE | |
| 2001 #define ASSERT_BUILT_WITH_MULE() assert(1) | |
| 2002 #else /* MULE */ | |
| 2003 #define ASSERT_BUILT_WITH_MULE() assert(0) | |
| 2004 #endif /* MULE */ | |
| 2005 | |
| 771 | 2006 int |
| 867 | 2007 ibyte_string_displayed_columns (const Ibyte *str, Bytecount len) |
| 771 | 2008 { |
| 2009 int cols = 0; | |
| 867 | 2010 const Ibyte *end = str + len; |
| 3571 | 2011 Ichar ch; |
| 2012 | |
| 2013 ASSERT_BUILT_WITH_MULE(); | |
| 771 | 2014 |
| 2015 while (str < end) | |
| 2016 { | |
| 3571 | 2017 ch = itext_ichar (str); |
| 867 | 2018 cols += XCHARSET_COLUMNS (ichar_charset (ch)); |
| 2019 INC_IBYTEPTR (str); | |
| 771 | 2020 } |
| 2021 | |
| 2022 return cols; | |
| 2023 } | |
| 2024 | |
| 2025 int | |
| 3571 | 2026 ichar_string_displayed_columns (const Ichar * USED_IF_MULE(str), Charcount len) |
| 771 | 2027 { |
| 2028 int cols = 0; | |
| 2029 int i; | |
| 2030 | |
| 3571 | 2031 ASSERT_BUILT_WITH_MULE(); |
| 2032 | |
| 771 | 2033 for (i = 0; i < len; i++) |
| 867 | 2034 cols += XCHARSET_COLUMNS (ichar_charset (str[i])); |
| 771 | 2035 |
| 2036 return cols; | |
| 2037 } | |
| 2038 | |
| 2039 Charcount | |
| 2333 | 2040 ibyte_string_nonascii_chars (const Ibyte *USED_IF_MULE (str), |
| 2041 Bytecount USED_IF_MULE (len)) | |
| 771 | 2042 { |
| 2043 #ifdef MULE | |
| 867 | 2044 const Ibyte *end = str + len; |
| 771 | 2045 Charcount retval = 0; |
| 2046 | |
| 2047 while (str < end) | |
| 2048 { | |
| 826 | 2049 if (!byte_ascii_p (*str)) |
| 771 | 2050 retval++; |
| 867 | 2051 INC_IBYTEPTR (str); |
| 771 | 2052 } |
| 2053 | |
| 2054 return retval; | |
| 2055 #else | |
| 2056 return 0; | |
| 2057 #endif | |
| 2058 } | |
| 2059 | |
| 2060 | |
| 2061 /***************************************************************************/ | |
| 2062 /* Eistring helper functions */ | |
| 2063 /***************************************************************************/ | |
| 2064 | |
| 2065 int | |
| 867 | 2066 eistr_casefiddle_1 (Ibyte *olddata, Bytecount len, Ibyte *newdata, |
| 771 | 2067 int downp) |
| 2068 { | |
| 867 | 2069 Ibyte *endp = olddata + len; |
| 2070 Ibyte *newp = newdata; | |
| 771 | 2071 int changedp = 0; |
| 2072 | |
| 2073 while (olddata < endp) | |
| 2074 { | |
| 867 | 2075 Ichar c = itext_ichar (olddata); |
| 2076 Ichar newc; | |
| 771 | 2077 |
| 2078 if (downp) | |
| 2079 newc = DOWNCASE (0, c); | |
| 2080 else | |
| 2081 newc = UPCASE (0, c); | |
| 2082 | |
| 2083 if (c != newc) | |
| 2084 changedp = 1; | |
| 2085 | |
| 867 | 2086 newp += set_itext_ichar (newp, newc); |
| 2087 INC_IBYTEPTR (olddata); | |
| 771 | 2088 } |
| 2089 | |
| 2090 *newp = '\0'; | |
| 2091 | |
| 2092 return changedp ? newp - newdata : 0; | |
| 2093 } | |
| 2094 | |
| 2095 int | |
| 2096 eifind_large_enough_buffer (int oldbufsize, int needed_size) | |
| 2097 { | |
| 2098 while (oldbufsize < needed_size) | |
| 2099 { | |
| 2100 oldbufsize = oldbufsize * 3 / 2; | |
| 2101 oldbufsize = max (oldbufsize, 32); | |
| 2102 } | |
| 2103 | |
| 2104 return oldbufsize; | |
| 2105 } | |
| 2106 | |
| 2107 void | |
| 2108 eito_malloc_1 (Eistring *ei) | |
| 2109 { | |
| 2110 if (ei->mallocp_) | |
| 2111 return; | |
| 2112 ei->mallocp_ = 1; | |
| 2113 if (ei->data_) | |
| 2114 { | |
| 867 | 2115 Ibyte *newdata; |
| 771 | 2116 |
| 2117 ei->max_size_allocated_ = | |
| 2118 eifind_large_enough_buffer (0, ei->bytelen_ + 1); | |
| 2367 | 2119 newdata = xnew_ibytes (ei->max_size_allocated_); |
| 771 | 2120 memcpy (newdata, ei->data_, ei->bytelen_ + 1); |
| 2121 ei->data_ = newdata; | |
| 2122 } | |
| 2123 | |
| 2124 if (ei->extdata_) | |
| 2125 { | |
| 2367 | 2126 Extbyte *newdata = xnew_extbytes (ei->extlen_ + 2); |
| 771 | 2127 |
| 2128 memcpy (newdata, ei->extdata_, ei->extlen_); | |
| 2129 /* Double null-terminate in case of Unicode data */ | |
| 2130 newdata[ei->extlen_] = '\0'; | |
| 2131 newdata[ei->extlen_ + 1] = '\0'; | |
| 2132 ei->extdata_ = newdata; | |
| 2133 } | |
| 2134 } | |
| 2135 | |
| 2136 int | |
| 2137 eicmp_1 (Eistring *ei, Bytecount off, Charcount charoff, | |
| 867 | 2138 Bytecount len, Charcount charlen, const Ibyte *data, |
| 2421 | 2139 const Eistring *ei2, int is_ascii, int fold_case) |
| 771 | 2140 { |
| 3462 | 2141 assert ((data == 0) != (ei == 0)); |
| 2142 assert ((is_ascii != 0) == (data != 0)); | |
| 2143 assert (fold_case >= 0 && fold_case <= 2); | |
| 771 | 2144 assert ((off < 0) != (charoff < 0)); |
| 3462 | 2145 |
| 771 | 2146 if (off < 0) |
| 2147 { | |
| 2148 off = charcount_to_bytecount (ei->data_, charoff); | |
| 2149 if (charlen < 0) | |
| 2150 len = -1; | |
| 2151 else | |
| 2152 len = charcount_to_bytecount (ei->data_ + off, charlen); | |
| 2153 } | |
| 2154 if (len < 0) | |
| 2155 len = ei->bytelen_ - off; | |
| 2156 | |
| 2157 assert (off >= 0 && off <= ei->bytelen_); | |
| 2158 assert (len >= 0 && off + len <= ei->bytelen_); | |
| 2159 | |
| 2160 { | |
| 2161 Bytecount dstlen; | |
| 867 | 2162 const Ibyte *src = ei->data_, *dst; |
| 771 | 2163 |
| 2164 if (data) | |
| 2165 { | |
| 2166 dst = data; | |
| 2167 dstlen = qxestrlen (data); | |
| 2168 } | |
| 2169 else | |
| 2170 { | |
| 2171 dst = ei2->data_; | |
| 2172 dstlen = ei2->bytelen_; | |
| 2173 } | |
| 2174 | |
| 2421 | 2175 if (is_ascii) |
| 2367 | 2176 ASSERT_ASCTEXT_ASCII_LEN ((Ascbyte *) dst, dstlen); |
| 771 | 2177 |
| 801 | 2178 return (fold_case == 0 ? qxememcmp4 (src, len, dst, dstlen) : |
| 2179 fold_case == 1 ? qxememcasecmp4 (src, len, dst, dstlen) : | |
| 2180 qxetextcasecmp (src, len, dst, dstlen)); | |
| 771 | 2181 } |
| 2182 } | |
| 2183 | |
| 867 | 2184 Ibyte * |
| 826 | 2185 eicpyout_malloc_fmt (Eistring *eistr, Bytecount *len_out, Internal_Format fmt, |
| 2286 | 2186 Lisp_Object UNUSED (object)) |
| 771 | 2187 { |
| 867 | 2188 Ibyte *ptr; |
| 771 | 2189 |
| 2190 assert (fmt == FORMAT_DEFAULT); | |
| 867 | 2191 ptr = xnew_array (Ibyte, eistr->bytelen_ + 1); |
| 771 | 2192 if (len_out) |
| 2193 *len_out = eistr->bytelen_; | |
| 2194 memcpy (ptr, eistr->data_, eistr->bytelen_ + 1); | |
| 2195 return ptr; | |
| 2196 } | |
| 2197 | |
| 2198 | |
| 2199 /************************************************************************/ | |
| 2200 /* Charcount/Bytecount conversion */ | |
| 2201 /************************************************************************/ | |
| 2202 | |
| 2203 /* Optimization. Do it. Live it. Love it. */ | |
| 2204 | |
| 2205 #ifdef MULE | |
| 2206 | |
| 826 | 2207 /* Function equivalents of bytecount_to_charcount/charcount_to_bytecount. |
| 2208 These work on strings of all sizes but are more efficient than a simple | |
| 2209 loop on large strings and probably less efficient on sufficiently small | |
| 2210 strings. */ | |
| 2211 | |
| 2212 Charcount | |
| 867 | 2213 bytecount_to_charcount_fun (const Ibyte *ptr, Bytecount len) |
| 826 | 2214 { |
| 2215 Charcount count = 0; | |
| 867 | 2216 const Ibyte *end = ptr + len; |
| 826 | 2217 while (1) |
| 2218 { | |
| 867 | 2219 const Ibyte *newptr = skip_ascii (ptr, end); |
| 826 | 2220 count += newptr - ptr; |
| 2221 ptr = newptr; | |
| 2222 if (ptr == end) | |
| 2223 break; | |
| 2224 { | |
| 2225 /* Optimize for successive characters from the same charset */ | |
| 867 | 2226 Ibyte leading_byte = *ptr; |
| 826 | 2227 int bytes = rep_bytes_by_first_byte (leading_byte); |
| 2228 while (ptr < end && *ptr == leading_byte) | |
| 2229 ptr += bytes, count++; | |
| 2230 } | |
| 771 | 2231 } |
| 2232 | |
| 2233 /* Bomb out if the specified substring ends in the middle | |
| 2234 of a character. Note that we might have already gotten | |
| 2235 a core dump above from an invalid reference, but at least | |
| 2236 we will get no farther than here. | |
| 2237 | |
| 2238 This also catches len < 0. */ | |
| 800 | 2239 text_checking_assert (ptr == end); |
| 771 | 2240 |
| 2241 return count; | |
| 2242 } | |
| 2243 | |
|
5784
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2244 /* Return the character count of an lstream or coding buffer of |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2245 internal-format text, counting partial characters at the beginning of the |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2246 buffer as whole characters, and *not* counting partial characters at the |
|
5785
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2247 end of the buffer. The result of this function is subtracted from the |
|
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2248 character count given by the coding system character tell methods, and we |
|
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2249 need to treat each buffer in the same way to avoid double-counting. */ |
|
5784
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2250 |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2251 Charcount |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2252 buffered_bytecount_to_charcount (const Ibyte *bufptr, Bytecount len) |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2253 { |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2254 Boolint partial_first = 0; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2255 Bytecount impartial; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2256 |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2257 if (valid_ibyteptr_p (bufptr)) |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2258 { |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2259 if (rep_bytes_by_first_byte (*bufptr) > len) |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2260 { |
|
5785
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2261 /* This is a partial last character. Return 0, avoid treating it |
|
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2262 as a partial first character, since that would lead to it being |
|
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2263 counted twice. */ |
|
7343a186a475
Correct some partial character accounting, buffered_bytecount_to_charcount().
Aidan Kehoe <kehoea@parhasard.net>
parents:
5784
diff
changeset
|
2264 return (Charcount) 0; |
|
5784
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2265 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2266 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2267 else |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2268 { |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2269 const Ibyte *newstart = bufptr, *limit = newstart + len; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2270 |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2271 /* Our consumer has the start of a partial character, we have the |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2272 rest. */ |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2273 while (newstart < limit && !valid_ibyteptr_p (newstart)) |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2274 { |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2275 newstart++; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2276 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2277 |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2278 partial_first = 1; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2279 bufptr = newstart; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2280 len = limit - newstart; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2281 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2282 |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2283 if (len && valid_ibyteptr_p (bufptr)) |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2284 { |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2285 /* There's at least one valid starting char in the string, |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2286 validate_ibyte_string_backward won't run off the begining. */ |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2287 impartial = validate_ibyte_string_backward (bufptr, len); |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2288 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2289 else |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2290 { |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2291 impartial = 0; |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2292 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2293 |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2294 return (Charcount) partial_first + bytecount_to_charcount (bufptr, |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2295 impartial); |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2296 } |
|
0cb4f494a548
Have the result of coding_character_tell() reflect str->convert_to, too.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5774
diff
changeset
|
2297 |
| 771 | 2298 Bytecount |
| 867 | 2299 charcount_to_bytecount_fun (const Ibyte *ptr, Charcount len) |
| 771 | 2300 { |
| 867 | 2301 const Ibyte *newptr = ptr; |
| 826 | 2302 while (1) |
| 771 | 2303 { |
| 867 | 2304 const Ibyte *newnewptr = skip_ascii (newptr, newptr + len); |
| 826 | 2305 len -= newnewptr - newptr; |
| 2306 newptr = newnewptr; | |
| 2307 if (!len) | |
| 2308 break; | |
| 2309 { | |
| 2310 /* Optimize for successive characters from the same charset */ | |
| 867 | 2311 Ibyte leading_byte = *newptr; |
| 826 | 2312 int bytes = rep_bytes_by_first_byte (leading_byte); |
| 2313 while (len > 0 && *newptr == leading_byte) | |
| 2314 newptr += bytes, len--; | |
| 2315 } | |
| 771 | 2316 } |
| 2317 return newptr - ptr; | |
| 2318 } | |
| 2319 | |
| 2367 | 2320 /* Function equivalent of charcount_to_bytecount_down. This works on strings |
| 2321 of all sizes but is more efficient than a simple loop on large strings | |
| 2322 and probably less efficient on sufficiently small strings. */ | |
| 2323 | |
| 2324 Bytecount | |
| 2325 charcount_to_bytecount_down_fun (const Ibyte *ptr, Charcount len) | |
| 2326 { | |
| 2327 const Ibyte *newptr = ptr; | |
| 2328 while (1) | |
| 2329 { | |
| 2330 const Ibyte *newnewptr = skip_ascii_down (newptr, newptr - len); | |
| 2331 len -= newptr - newnewptr; | |
| 2332 newptr = newnewptr; | |
| 2333 /* Skip over all non-ASCII chars, counting the length and | |
| 2334 stopping if it's zero */ | |
| 2335 while (len && !byte_ascii_p (*(newptr - 1))) | |
| 2336 if (ibyte_first_byte_p (*--newptr)) | |
| 2337 len--; | |
| 2338 if (!len) | |
| 2339 break; | |
| 2340 } | |
| 2341 text_checking_assert (ptr - newptr >= 0); | |
| 2342 return ptr - newptr; | |
| 2343 } | |
| 2344 | |
| 771 | 2345 /* The next two functions are the actual meat behind the |
| 2346 charbpos-to-bytebpos and bytebpos-to-charbpos conversions. Currently | |
| 2347 the method they use is fairly unsophisticated; see buffer.h. | |
| 2348 | |
| 2349 Note that charbpos_to_bytebpos_func() is probably the most-called | |
| 2350 function in all of XEmacs. Therefore, it must be FAST FAST FAST. | |
| 2351 This is the reason why so much of the code is duplicated. | |
| 2352 | |
| 2353 Similar considerations apply to bytebpos_to_charbpos_func(), although | |
| 2354 less so because the function is not called so often. | |
| 2367 | 2355 */ |
| 2356 | |
| 2357 /* | |
| 2358 | |
| 2359 Info on Byte-Char conversion: | |
| 2360 | |
| 2361 (Info-goto-node "(internals)Byte-Char Position Conversion") | |
| 2362 */ | |
| 2363 | |
| 2364 #ifdef OLD_BYTE_CHAR | |
| 771 | 2365 static int not_very_random_number; |
| 2367 | 2366 #endif /* OLD_BYTE_CHAR */ |
| 2367 | |
| 2368 #define OLD_LOOP | |
| 2369 | |
| 2370 /* If we are this many characters away from any known position, cache the | |
| 2371 new position in the buffer's char-byte cache. */ | |
| 2372 #define FAR_AWAY_DISTANCE 5000 | |
| 2373 | |
| 2374 /* Converting between character positions and byte positions. */ | |
| 2375 | |
| 2376 /* There are several places in the buffer where we know | |
| 2377 the correspondence: BEG, BEGV, PT, GPT, ZV and Z, | |
| 2378 and everywhere there is a marker. So we find the one of these places | |
| 2379 that is closest to the specified position, and scan from there. */ | |
| 2380 | |
| 2381 /* This macro is a subroutine of charbpos_to_bytebpos_func. | |
| 2382 Note that it is desirable that BYTEPOS is not evaluated | |
| 2383 except when we really want its value. */ | |
| 2384 | |
| 2385 #define CONSIDER(CHARPOS, BYTEPOS) \ | |
| 2386 do \ | |
| 2387 { \ | |
| 2388 Charbpos this_charpos = (CHARPOS); \ | |
| 2389 int changed = 0; \ | |
| 2390 \ | |
| 2391 if (this_charpos == x) \ | |
| 2392 { \ | |
| 2393 retval = (BYTEPOS); \ | |
| 2394 goto done; \ | |
| 2395 } \ | |
| 2396 else if (this_charpos > x) \ | |
| 2397 { \ | |
| 2398 if (this_charpos < best_above) \ | |
| 2399 { \ | |
| 2400 best_above = this_charpos; \ | |
| 2401 best_above_byte = (BYTEPOS); \ | |
| 2402 changed = 1; \ | |
| 2403 } \ | |
| 2404 } \ | |
| 2405 else if (this_charpos > best_below) \ | |
| 2406 { \ | |
| 2407 best_below = this_charpos; \ | |
| 2408 best_below_byte = (BYTEPOS); \ | |
| 2409 changed = 1; \ | |
| 2410 } \ | |
| 2411 \ | |
| 2412 if (changed) \ | |
| 2413 { \ | |
| 2414 if (best_above - best_below == best_above_byte - best_below_byte) \ | |
| 2415 { \ | |
| 2416 retval = best_below_byte + (x - best_below); \ | |
| 2417 goto done; \ | |
| 2418 } \ | |
| 2419 } \ | |
| 2420 } \ | |
| 2421 while (0) | |
| 2422 | |
| 771 | 2423 |
| 2424 Bytebpos | |
| 2425 charbpos_to_bytebpos_func (struct buffer *buf, Charbpos x) | |
| 2426 { | |
| 2367 | 2427 #ifdef OLD_BYTE_CHAR |
| 771 | 2428 Charbpos bufmin; |
| 2429 Charbpos bufmax; | |
| 2430 Bytebpos bytmin; | |
| 2431 Bytebpos bytmax; | |
| 2432 int size; | |
| 2433 int forward_p; | |
| 2434 int diff_so_far; | |
| 2435 int add_to_cache = 0; | |
| 2367 | 2436 #endif /* OLD_BYTE_CHAR */ |
| 2437 | |
| 2438 Charbpos best_above, best_below; | |
| 2439 Bytebpos best_above_byte, best_below_byte; | |
| 2440 int i; | |
| 2441 struct buffer_text *t; | |
| 2442 Bytebpos retval; | |
| 2443 | |
| 1292 | 2444 PROFILE_DECLARE (); |
| 771 | 2445 |
| 1292 | 2446 PROFILE_RECORD_ENTERING_SECTION (QSin_char_byte_conversion); |
| 2447 | |
| 2367 | 2448 best_above = BUF_Z (buf); |
| 2449 best_above_byte = BYTE_BUF_Z (buf); | |
| 2450 | |
| 2451 /* In this case, we simply have all one-byte characters. But this should | |
| 2452 have been intercepted before, in charbpos_to_bytebpos(). */ | |
| 2453 text_checking_assert (best_above != best_above_byte); | |
| 2454 | |
| 2455 best_below = BUF_BEG (buf); | |
| 2456 best_below_byte = BYTE_BUF_BEG (buf); | |
| 2457 | |
| 2458 /* We find in best_above and best_above_byte | |
| 2459 the closest known point above CHARPOS, | |
| 2460 and in best_below and best_below_byte | |
| 2461 the closest known point below CHARPOS, | |
| 2462 | |
| 2463 If at any point we can tell that the space between those | |
| 2464 two best approximations is all single-byte, | |
| 2465 we interpolate the result immediately. */ | |
| 2466 | |
| 2467 CONSIDER (BUF_PT (buf), BYTE_BUF_PT (buf)); | |
| 2468 CONSIDER (BUF_GPT (buf), BYTE_BUF_GPT (buf)); | |
| 2469 CONSIDER (BUF_BEGV (buf), BYTE_BUF_BEGV (buf)); | |
| 2470 CONSIDER (BUF_ZV (buf), BYTE_BUF_ZV (buf)); | |
| 2471 | |
| 2472 t = buf->text; | |
| 2473 CONSIDER (t->cached_charpos, t->cached_bytepos); | |
| 2474 | |
| 2475 /* Check the most recently entered positions first */ | |
| 2476 | |
| 2477 for (i = t->next_cache_pos - 1; i >= 0; i--) | |
| 2478 { | |
| 2479 CONSIDER (t->mule_charbpos_cache[i], t->mule_bytebpos_cache[i]); | |
| 2480 | |
| 2481 /* If we are down to a range of 50 chars, | |
| 2482 don't bother checking any other markers; | |
| 2483 scan the intervening chars directly now. */ | |
| 2484 if (best_above - best_below < 50) | |
| 2485 break; | |
| 2486 } | |
| 2487 | |
| 2488 /* We get here if we did not exactly hit one of the known places. | |
| 2489 We have one known above and one known below. | |
| 2490 Scan, counting characters, from whichever one is closer. */ | |
| 2491 | |
| 2492 if (x - best_below < best_above - x) | |
| 2493 { | |
| 2494 int record = x - best_below > FAR_AWAY_DISTANCE; | |
| 2495 | |
| 2496 #ifdef OLD_LOOP /* old code */ | |
| 2497 while (best_below != x) | |
| 2498 { | |
| 2499 best_below++; | |
| 2500 INC_BYTEBPOS (buf, best_below_byte); | |
| 2501 } | |
| 2502 #else | |
| 2503 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT); | |
| 2504 /* The gap should not occur between best_below and x, or we will be | |
| 2505 screwed in using charcount_to_bytecount(). It should not be exactly | |
| 2506 at x either, because we already should have caught that. */ | |
| 2507 text_checking_assert | |
| 2508 (BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, best_below) > x); | |
| 2509 | |
| 2510 /* Using charcount_to_bytecount() is potentially a lot faster than a | |
| 2511 simple loop using INC_BYTEBPOS() because (a) the checks for gap | |
| 2512 and buffer format are factored out instead of getting checked | |
| 2513 every time; (b) the checking goes 4 or 8 bytes at a time in ASCII | |
| 2514 text. | |
| 2515 */ | |
| 2516 best_below_byte += | |
| 2517 charcount_to_bytecount | |
| 2518 (BYTE_BUF_BYTE_ADDRESS (buf, best_below_byte), x - best_below); | |
| 2519 best_below = x; | |
| 2520 #endif /* 0 */ | |
| 2521 | |
| 2522 /* If this position is quite far from the nearest known position, | |
| 2523 cache the correspondence. | |
| 2524 | |
| 2525 NB FSF does this: "... by creating a marker here. | |
| 2526 It will last until the next GC." | |
| 2527 */ | |
| 2528 | |
| 2529 if (record) | |
| 2530 { | |
| 2531 /* If we have run out of positions to record, discard some of the | |
| 2532 old ones. I used to use a circular buffer, which avoids the | |
| 2533 need to block-move any memory. But it makes it more difficult | |
| 2534 to keep track of which positions haven't been used -- commonly | |
| 2535 we haven't yet filled out anywhere near the whole set of | |
| 2536 positions and don't want to check them all. We should not be | |
| 2537 recording that often, and block-moving is extremely fast in | |
| 2538 any case. --ben */ | |
| 2539 if (t->next_cache_pos == NUM_CACHED_POSITIONS) | |
| 2540 { | |
| 2541 memmove (t->mule_charbpos_cache, | |
| 2542 t->mule_charbpos_cache + NUM_MOVED_POSITIONS, | |
| 2543 sizeof (Charbpos) * | |
| 2544 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 2545 memmove (t->mule_bytebpos_cache, | |
| 2546 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS, | |
| 2547 sizeof (Bytebpos) * | |
| 2548 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 2549 t->next_cache_pos -= NUM_MOVED_POSITIONS; | |
| 2550 } | |
| 2551 t->mule_charbpos_cache[t->next_cache_pos] = best_below; | |
| 2552 t->mule_bytebpos_cache[t->next_cache_pos] = best_below_byte; | |
| 2553 t->next_cache_pos++; | |
| 2554 } | |
| 2555 | |
| 2556 t->cached_charpos = best_below; | |
| 2557 t->cached_bytepos = best_below_byte; | |
| 2558 | |
| 2559 retval = best_below_byte; | |
| 2560 text_checking_assert (best_below_byte >= best_below); | |
| 2561 goto done; | |
| 2562 } | |
| 2563 else | |
| 2564 { | |
| 2565 int record = best_above - x > FAR_AWAY_DISTANCE; | |
| 2566 | |
| 2567 #ifdef OLD_LOOP | |
| 2568 while (best_above != x) | |
| 2569 { | |
| 2570 best_above--; | |
| 2571 DEC_BYTEBPOS (buf, best_above_byte); | |
| 2572 } | |
| 2573 #else | |
| 2574 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT); | |
| 2575 /* The gap should not occur between best_above and x, or we will be | |
| 2576 screwed in using charcount_to_bytecount_down(). It should not be | |
| 2577 exactly at x either, because we already should have caught | |
| 2578 that. */ | |
| 2579 text_checking_assert | |
| 2580 (BUF_FLOOR_OF_IGNORE_ACCESSIBLE (buf, best_above) < x); | |
| 2581 | |
| 2582 /* Using charcount_to_bytecount_down() is potentially a lot faster | |
| 2583 than a simple loop using DEC_BYTEBPOS(); see above. */ | |
| 2584 best_above_byte -= | |
| 2585 charcount_to_bytecount_down | |
| 2586 /* BYTE_BUF_BYTE_ADDRESS will return a value on the high side of the | |
| 2587 gap if we are at the gap, which is the wrong side. So do the | |
| 2588 following trick instead. */ | |
| 2589 (BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, best_above_byte) + 1, | |
| 2590 best_above - x); | |
| 2591 best_above = x; | |
| 2592 #endif /* SLEDGEHAMMER_CHECK_TEXT */ | |
| 2593 | |
| 2594 | |
| 2595 /* If this position is quite far from the nearest known position, | |
| 2596 cache the correspondence. | |
| 2597 | |
| 2598 NB FSF does this: "... by creating a marker here. | |
| 2599 It will last until the next GC." | |
| 2600 */ | |
| 2601 if (record) | |
| 2602 { | |
| 2603 if (t->next_cache_pos == NUM_CACHED_POSITIONS) | |
| 2604 { | |
| 2605 memmove (t->mule_charbpos_cache, | |
| 2606 t->mule_charbpos_cache + NUM_MOVED_POSITIONS, | |
| 2607 sizeof (Charbpos) * | |
| 2608 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 2609 memmove (t->mule_bytebpos_cache, | |
| 2610 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS, | |
| 2611 sizeof (Bytebpos) * | |
| 2612 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 2613 t->next_cache_pos -= NUM_MOVED_POSITIONS; | |
| 2614 } | |
| 2615 t->mule_charbpos_cache[t->next_cache_pos] = best_above; | |
| 2616 t->mule_bytebpos_cache[t->next_cache_pos] = best_above_byte; | |
| 2617 t->next_cache_pos++; | |
| 2618 } | |
| 2619 | |
| 2620 t->cached_charpos = best_above; | |
| 2621 t->cached_bytepos = best_above_byte; | |
| 2622 | |
| 2623 retval = best_above_byte; | |
| 2624 text_checking_assert (best_above_byte >= best_above); | |
| 2625 goto done; | |
| 2626 } | |
| 2627 | |
| 2628 #ifdef OLD_BYTE_CHAR | |
| 2629 | |
| 771 | 2630 bufmin = buf->text->mule_bufmin; |
| 2631 bufmax = buf->text->mule_bufmax; | |
| 2632 bytmin = buf->text->mule_bytmin; | |
| 2633 bytmax = buf->text->mule_bytmax; | |
| 2634 size = (1 << buf->text->mule_shifter) + !!buf->text->mule_three_p; | |
| 2635 | |
| 2636 /* The basic idea here is that we shift the "known region" up or down | |
| 2637 until it overlaps the specified position. We do this by moving | |
| 2638 the upper bound of the known region up one character at a time, | |
| 2639 and moving the lower bound of the known region up as necessary | |
| 2640 when the size of the character just seen changes. | |
| 2641 | |
| 2642 We optimize this, however, by first shifting the known region to | |
| 2643 one of the cached points if it's close by. (We don't check BEG or | |
| 2644 Z, even though they're cached; most of the time these will be the | |
| 2645 same as BEGV and ZV, and when they're not, they're not likely | |
| 2646 to be used.) */ | |
| 2647 | |
| 2648 if (x > bufmax) | |
| 2649 { | |
| 2650 Charbpos diffmax = x - bufmax; | |
| 2651 Charbpos diffpt = x - BUF_PT (buf); | |
| 2652 Charbpos diffzv = BUF_ZV (buf) - x; | |
| 2653 /* #### This value could stand some more exploration. */ | |
| 2654 Charcount heuristic_hack = (bufmax - bufmin) >> 2; | |
| 2655 | |
| 2656 /* Check if the position is closer to PT or ZV than to the | |
| 2657 end of the known region. */ | |
| 2658 | |
| 2659 if (diffpt < 0) | |
| 2660 diffpt = -diffpt; | |
| 2661 if (diffzv < 0) | |
| 2662 diffzv = -diffzv; | |
| 2663 | |
| 2664 /* But also implement a heuristic that favors the known region | |
| 2665 over PT or ZV. The reason for this is that switching to | |
| 2666 PT or ZV will wipe out the knowledge in the known region, | |
| 2667 which might be annoying if the known region is large and | |
| 2668 PT or ZV is not that much closer than the end of the known | |
| 2669 region. */ | |
| 2670 | |
| 2671 diffzv += heuristic_hack; | |
| 2672 diffpt += heuristic_hack; | |
| 2673 if (diffpt < diffmax && diffpt <= diffzv) | |
| 2674 { | |
| 2675 bufmax = bufmin = BUF_PT (buf); | |
| 826 | 2676 bytmax = bytmin = BYTE_BUF_PT (buf); |
| 771 | 2677 /* We set the size to 1 even though it doesn't really |
| 2678 matter because the new known region contains no | |
| 2679 characters. We do this because this is the most | |
| 2680 likely size of the characters around the new known | |
| 2681 region, and we avoid potential yuckiness that is | |
| 2682 done when size == 3. */ | |
| 2683 size = 1; | |
| 2684 } | |
| 2685 if (diffzv < diffmax) | |
| 2686 { | |
| 2687 bufmax = bufmin = BUF_ZV (buf); | |
| 826 | 2688 bytmax = bytmin = BYTE_BUF_ZV (buf); |
| 771 | 2689 size = 1; |
| 2690 } | |
| 2691 } | |
| 800 | 2692 #ifdef ERROR_CHECK_TEXT |
| 771 | 2693 else if (x >= bufmin) |
| 2500 | 2694 ABORT (); |
| 771 | 2695 #endif |
| 2696 else | |
| 2697 { | |
| 2698 Charbpos diffmin = bufmin - x; | |
| 2699 Charbpos diffpt = BUF_PT (buf) - x; | |
| 2700 Charbpos diffbegv = x - BUF_BEGV (buf); | |
| 2701 /* #### This value could stand some more exploration. */ | |
| 2702 Charcount heuristic_hack = (bufmax - bufmin) >> 2; | |
| 2703 | |
| 2704 if (diffpt < 0) | |
| 2705 diffpt = -diffpt; | |
| 2706 if (diffbegv < 0) | |
| 2707 diffbegv = -diffbegv; | |
| 2708 | |
| 2709 /* But also implement a heuristic that favors the known region -- | |
| 2710 see above. */ | |
| 2711 | |
| 2712 diffbegv += heuristic_hack; | |
| 2713 diffpt += heuristic_hack; | |
| 2714 | |
| 2715 if (diffpt < diffmin && diffpt <= diffbegv) | |
| 2716 { | |
| 2717 bufmax = bufmin = BUF_PT (buf); | |
| 826 | 2718 bytmax = bytmin = BYTE_BUF_PT (buf); |
| 771 | 2719 /* We set the size to 1 even though it doesn't really |
| 2720 matter because the new known region contains no | |
| 2721 characters. We do this because this is the most | |
| 2722 likely size of the characters around the new known | |
| 2723 region, and we avoid potential yuckiness that is | |
| 2724 done when size == 3. */ | |
| 2725 size = 1; | |
| 2726 } | |
| 2727 if (diffbegv < diffmin) | |
| 2728 { | |
| 2729 bufmax = bufmin = BUF_BEGV (buf); | |
| 826 | 2730 bytmax = bytmin = BYTE_BUF_BEGV (buf); |
| 771 | 2731 size = 1; |
| 2732 } | |
| 2733 } | |
| 2734 | |
| 2735 diff_so_far = x > bufmax ? x - bufmax : bufmin - x; | |
| 2736 if (diff_so_far > 50) | |
| 2737 { | |
| 2738 /* If we have to move more than a certain amount, then look | |
| 2739 into our cache. */ | |
| 2740 int minval = INT_MAX; | |
| 2741 int found = 0; | |
| 2742 int i; | |
| 2743 | |
| 2744 add_to_cache = 1; | |
| 2745 /* I considered keeping the positions ordered. This would speed | |
| 2746 up this loop, but updating the cache would take longer, so | |
| 2747 it doesn't seem like it would really matter. */ | |
| 2367 | 2748 for (i = 0; i < NUM_CACHED_POSITIONS; i++) |
| 771 | 2749 { |
| 2750 int diff = buf->text->mule_charbpos_cache[i] - x; | |
| 2751 | |
| 2752 if (diff < 0) | |
| 2753 diff = -diff; | |
| 2754 if (diff < minval) | |
| 2755 { | |
| 2756 minval = diff; | |
| 2757 found = i; | |
| 2758 } | |
| 2759 } | |
| 2760 | |
| 2761 if (minval < diff_so_far) | |
| 2762 { | |
| 2763 bufmax = bufmin = buf->text->mule_charbpos_cache[found]; | |
| 2764 bytmax = bytmin = buf->text->mule_bytebpos_cache[found]; | |
| 2765 size = 1; | |
| 2766 } | |
| 2767 } | |
| 2768 | |
| 2769 /* It's conceivable that the caching above could lead to X being | |
| 2770 the same as one of the range edges. */ | |
| 2771 if (x >= bufmax) | |
| 2772 { | |
| 2773 Bytebpos newmax; | |
| 2774 Bytecount newsize; | |
| 2775 | |
| 2776 forward_p = 1; | |
| 2777 while (x > bufmax) | |
| 2778 { | |
| 2779 newmax = bytmax; | |
| 2780 | |
| 2781 INC_BYTEBPOS (buf, newmax); | |
| 2782 newsize = newmax - bytmax; | |
| 2783 if (newsize != size) | |
| 2784 { | |
| 2785 bufmin = bufmax; | |
| 2786 bytmin = bytmax; | |
| 2787 size = newsize; | |
| 2788 } | |
| 2789 bytmax = newmax; | |
| 2790 bufmax++; | |
| 2791 } | |
| 2792 retval = bytmax; | |
| 2793 | |
| 2794 /* #### Should go past the found location to reduce the number | |
| 2795 of times that this function is called */ | |
| 2796 } | |
| 2797 else /* x < bufmin */ | |
| 2798 { | |
| 2799 Bytebpos newmin; | |
| 2800 Bytecount newsize; | |
| 2801 | |
| 2802 forward_p = 0; | |
| 2803 while (x < bufmin) | |
| 2804 { | |
| 2805 newmin = bytmin; | |
| 2806 | |
| 2807 DEC_BYTEBPOS (buf, newmin); | |
| 2808 newsize = bytmin - newmin; | |
| 2809 if (newsize != size) | |
| 2810 { | |
| 2811 bufmax = bufmin; | |
| 2812 bytmax = bytmin; | |
| 2813 size = newsize; | |
| 2814 } | |
| 2815 bytmin = newmin; | |
| 2816 bufmin--; | |
| 2817 } | |
| 2818 retval = bytmin; | |
| 2819 | |
| 2820 /* #### Should go past the found location to reduce the number | |
| 2821 of times that this function is called | |
| 2822 */ | |
| 2823 } | |
| 2824 | |
| 2825 /* If size is three, than we have to max sure that the range we | |
| 2826 discovered isn't too large, because we use a fixed-length | |
| 2827 table to divide by 3. */ | |
| 2828 | |
| 2829 if (size == 3) | |
| 2830 { | |
| 2831 int gap = bytmax - bytmin; | |
| 2832 buf->text->mule_three_p = 1; | |
| 2833 buf->text->mule_shifter = 1; | |
| 2834 | |
| 2835 if (gap > MAX_BYTEBPOS_GAP_SIZE_3) | |
| 2836 { | |
| 2837 if (forward_p) | |
| 2838 { | |
| 2839 bytmin = bytmax - MAX_BYTEBPOS_GAP_SIZE_3; | |
| 2840 bufmin = bufmax - MAX_CHARBPOS_GAP_SIZE_3; | |
| 2841 } | |
| 2842 else | |
| 2843 { | |
| 2844 bytmax = bytmin + MAX_BYTEBPOS_GAP_SIZE_3; | |
| 2845 bufmax = bufmin + MAX_CHARBPOS_GAP_SIZE_3; | |
| 2846 } | |
| 2847 } | |
| 2848 } | |
| 2849 else | |
| 2850 { | |
| 2851 buf->text->mule_three_p = 0; | |
| 2852 if (size == 4) | |
| 2853 buf->text->mule_shifter = 2; | |
| 2854 else | |
| 2855 buf->text->mule_shifter = size - 1; | |
| 2856 } | |
| 2857 | |
| 2858 buf->text->mule_bufmin = bufmin; | |
| 2859 buf->text->mule_bufmax = bufmax; | |
| 2860 buf->text->mule_bytmin = bytmin; | |
| 2861 buf->text->mule_bytmax = bytmax; | |
| 2862 | |
| 2863 if (add_to_cache) | |
| 2864 { | |
| 2865 int replace_loc; | |
| 2866 | |
| 2867 /* We throw away a "random" cached value and replace it with | |
| 2868 the new value. It doesn't actually have to be very random | |
| 2869 at all, just evenly distributed. | |
| 2870 | |
| 2871 #### It would be better to use a least-recently-used algorithm | |
| 2872 or something that tries to space things out, but I'm not sure | |
| 2873 it's worth it to go to the trouble of maintaining that. */ | |
| 2874 not_very_random_number += 621; | |
| 2875 replace_loc = not_very_random_number & 15; | |
| 2876 buf->text->mule_charbpos_cache[replace_loc] = x; | |
| 2877 buf->text->mule_bytebpos_cache[replace_loc] = retval; | |
| 2878 } | |
| 2879 | |
| 2367 | 2880 #endif /* OLD_BYTE_CHAR */ |
| 2881 | |
| 2882 done: | |
| 1292 | 2883 PROFILE_RECORD_EXITING_SECTION (QSin_char_byte_conversion); |
| 2884 | |
| 771 | 2885 return retval; |
| 2886 } | |
| 2887 | |
| 2367 | 2888 #undef CONSIDER |
| 2889 | |
| 2890 /* bytepos_to_charpos returns the char position corresponding to BYTEPOS. */ | |
| 2891 | |
| 2892 /* This macro is a subroutine of bytebpos_to_charbpos_func. | |
| 2893 It is used when BYTEPOS is actually the byte position. */ | |
| 2894 | |
| 2895 #define CONSIDER(BYTEPOS, CHARPOS) \ | |
| 2896 do \ | |
| 2897 { \ | |
| 2898 Bytebpos this_bytepos = (BYTEPOS); \ | |
| 2899 int changed = 0; \ | |
| 2900 \ | |
| 2901 if (this_bytepos == x) \ | |
| 2902 { \ | |
| 2903 retval = (CHARPOS); \ | |
| 2904 goto done; \ | |
| 2905 } \ | |
| 2906 else if (this_bytepos > x) \ | |
| 2907 { \ | |
| 2908 if (this_bytepos < best_above_byte) \ | |
| 2909 { \ | |
| 2910 best_above = (CHARPOS); \ | |
| 2911 best_above_byte = this_bytepos; \ | |
| 2912 changed = 1; \ | |
| 2913 } \ | |
| 2914 } \ | |
| 2915 else if (this_bytepos > best_below_byte) \ | |
| 2916 { \ | |
| 2917 best_below = (CHARPOS); \ | |
| 2918 best_below_byte = this_bytepos; \ | |
| 2919 changed = 1; \ | |
| 2920 } \ | |
| 2921 \ | |
| 2922 if (changed) \ | |
| 2923 { \ | |
| 2924 if (best_above - best_below == best_above_byte - best_below_byte) \ | |
| 2925 { \ | |
| 2926 retval = best_below + (x - best_below_byte); \ | |
| 2927 goto done; \ | |
| 2928 } \ | |
| 2929 } \ | |
| 2930 } \ | |
| 2931 while (0) | |
| 2932 | |
| 771 | 2933 /* The logic in this function is almost identical to the logic in |
| 2934 the previous function. */ | |
| 2935 | |
| 2936 Charbpos | |
| 2937 bytebpos_to_charbpos_func (struct buffer *buf, Bytebpos x) | |
| 2938 { | |
| 2367 | 2939 #ifdef OLD_BYTE_CHAR |
| 771 | 2940 Charbpos bufmin; |
| 2941 Charbpos bufmax; | |
| 2942 Bytebpos bytmin; | |
| 2943 Bytebpos bytmax; | |
| 2944 int size; | |
| 2945 int forward_p; | |
| 2946 int diff_so_far; | |
| 2947 int add_to_cache = 0; | |
| 2367 | 2948 #endif /* OLD_BYTE_CHAR */ |
| 2949 | |
| 2950 Charbpos best_above, best_above_byte; | |
| 2951 Bytebpos best_below, best_below_byte; | |
| 2952 int i; | |
| 2953 struct buffer_text *t; | |
| 2954 Charbpos retval; | |
| 2955 | |
| 1292 | 2956 PROFILE_DECLARE (); |
| 771 | 2957 |
| 1292 | 2958 PROFILE_RECORD_ENTERING_SECTION (QSin_char_byte_conversion); |
| 2959 | |
| 2367 | 2960 best_above = BUF_Z (buf); |
| 2961 best_above_byte = BYTE_BUF_Z (buf); | |
| 2962 | |
| 2963 /* In this case, we simply have all one-byte characters. But this should | |
| 2964 have been intercepted before, in bytebpos_to_charbpos(). */ | |
| 2965 text_checking_assert (best_above != best_above_byte); | |
| 2966 | |
| 2967 best_below = BUF_BEG (buf); | |
| 2968 best_below_byte = BYTE_BUF_BEG (buf); | |
| 2969 | |
| 2970 CONSIDER (BYTE_BUF_PT (buf), BUF_PT (buf)); | |
| 2971 CONSIDER (BYTE_BUF_GPT (buf), BUF_GPT (buf)); | |
| 2972 CONSIDER (BYTE_BUF_BEGV (buf), BUF_BEGV (buf)); | |
| 2973 CONSIDER (BYTE_BUF_ZV (buf), BUF_ZV (buf)); | |
| 2974 | |
| 2975 t = buf->text; | |
| 2976 CONSIDER (t->cached_bytepos, t->cached_charpos); | |
| 2977 | |
| 2978 /* Check the most recently entered positions first */ | |
| 2979 | |
| 2980 for (i = t->next_cache_pos - 1; i >= 0; i--) | |
| 2981 { | |
| 2982 CONSIDER (t->mule_bytebpos_cache[i], t->mule_charbpos_cache[i]); | |
| 2983 | |
| 2984 /* If we are down to a range of 50 chars, | |
| 2985 don't bother checking any other markers; | |
| 2986 scan the intervening chars directly now. */ | |
| 2987 if (best_above - best_below < 50) | |
| 2988 break; | |
| 2989 } | |
| 2990 | |
| 2991 /* We get here if we did not exactly hit one of the known places. | |
| 2992 We have one known above and one known below. | |
| 2993 Scan, counting characters, from whichever one is closer. */ | |
| 2994 | |
| 2995 if (x - best_below_byte < best_above_byte - x) | |
| 2996 { | |
| 2997 int record = x - best_below_byte > 5000; | |
| 2998 | |
| 2999 #ifdef OLD_LOOP /* old code */ | |
|
4526
38493c0fb952
Fix accidental deletion in src/text.c.
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4525
diff
changeset
|
3000 while (best_below_byte < x) |
| 2367 | 3001 { |
| 3002 best_below++; | |
| 3003 INC_BYTEBPOS (buf, best_below_byte); | |
| 3004 } | |
| 3005 #else | |
| 3006 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT); | |
| 3007 /* The gap should not occur between best_below and x, or we will be | |
| 3008 screwed in using charcount_to_bytecount(). It should not be exactly | |
| 3009 at x either, because we already should have caught that. */ | |
| 3010 text_checking_assert | |
| 3011 (BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, best_below_byte) > x); | |
| 3012 | |
| 3013 /* Using bytecount_to_charcount() is potentially a lot faster than | |
| 3014 a simple loop above using INC_BYTEBPOS(); see above. | |
| 3015 */ | |
| 3016 best_below += | |
| 3017 bytecount_to_charcount | |
| 3018 (BYTE_BUF_BYTE_ADDRESS (buf, best_below_byte), x - best_below_byte); | |
| 3019 best_below_byte = x; | |
| 3020 #endif | |
| 3021 | |
| 3022 /* If this position is quite far from the nearest known position, | |
| 3023 cache the correspondence. | |
| 3024 | |
| 3025 NB FSF does this: "... by creating a marker here. | |
| 3026 It will last until the next GC." | |
| 3027 */ | |
| 3028 | |
| 3029 if (record) | |
| 3030 { | |
| 3031 if (t->next_cache_pos == NUM_CACHED_POSITIONS) | |
| 3032 { | |
| 3033 memmove (t->mule_charbpos_cache, | |
| 3034 t->mule_charbpos_cache + NUM_MOVED_POSITIONS, | |
| 3035 sizeof (Charbpos) * | |
| 3036 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 3037 memmove (t->mule_bytebpos_cache, | |
| 3038 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS, | |
| 3039 sizeof (Bytebpos) * | |
| 3040 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 3041 t->next_cache_pos -= NUM_MOVED_POSITIONS; | |
| 3042 } | |
| 3043 t->mule_charbpos_cache[t->next_cache_pos] = best_below; | |
| 3044 t->mule_bytebpos_cache[t->next_cache_pos] = best_below_byte; | |
| 3045 t->next_cache_pos++; | |
| 3046 } | |
| 3047 | |
| 3048 | |
| 3049 t->cached_charpos = best_below; | |
| 3050 t->cached_bytepos = best_below_byte; | |
| 3051 | |
| 3052 retval = best_below; | |
| 3053 text_checking_assert (best_below_byte >= best_below); | |
| 3054 goto done; | |
| 3055 } | |
| 3056 else | |
| 3057 { | |
| 3058 int record = best_above_byte - x > 5000; | |
| 3059 | |
| 3060 #ifdef OLD_LOOP /* old code */ | |
| 3061 while (best_above_byte > x) | |
| 3062 { | |
| 3063 best_above--; | |
| 3064 DEC_BYTEBPOS (buf, best_above_byte); | |
| 3065 } | |
| 3066 #else | |
| 3067 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT); | |
| 3068 /* The gap should not occur between best_above and x, or we will be | |
| 3069 screwed in using bytecount_to_charcount_down(). It should not be | |
| 3070 exactly at x either, because we already should have caught | |
| 3071 that. */ | |
| 3072 text_checking_assert | |
| 3073 (BYTE_BUF_FLOOR_OF_IGNORE_ACCESSIBLE (buf, best_above_byte) < x); | |
| 3074 | |
| 3075 /* Using bytecount_to_charcount_down() is potentially a lot faster | |
| 3076 than a simple loop using INC_BYTEBPOS(); see above. */ | |
| 3077 best_above -= | |
| 3078 bytecount_to_charcount_down | |
| 3079 /* BYTE_BUF_BYTE_ADDRESS will return a value on the high side of the | |
| 3080 gap if we are at the gap, which is the wrong side. So do the | |
| 3081 following trick instead. */ | |
| 3082 (BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, best_above_byte) + 1, | |
| 3083 best_above_byte - x); | |
| 3084 best_above_byte = x; | |
| 3085 #endif | |
| 3086 | |
| 3087 | |
| 3088 /* If this position is quite far from the nearest known position, | |
| 3089 cache the correspondence. | |
| 3090 | |
| 3091 NB FSF does this: "... by creating a marker here. | |
| 3092 It will last until the next GC." | |
| 3093 */ | |
| 3094 if (record) | |
| 3095 { | |
| 3096 if (t->next_cache_pos == NUM_CACHED_POSITIONS) | |
| 3097 { | |
| 3098 memmove (t->mule_charbpos_cache, | |
| 3099 t->mule_charbpos_cache + NUM_MOVED_POSITIONS, | |
| 3100 sizeof (Charbpos) * | |
| 3101 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 3102 memmove (t->mule_bytebpos_cache, | |
| 3103 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS, | |
| 3104 sizeof (Bytebpos) * | |
| 3105 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS)); | |
| 3106 t->next_cache_pos -= NUM_MOVED_POSITIONS; | |
| 3107 } | |
| 3108 t->mule_charbpos_cache[t->next_cache_pos] = best_above; | |
| 3109 t->mule_bytebpos_cache[t->next_cache_pos] = best_above_byte; | |
| 3110 t->next_cache_pos++; | |
| 3111 } | |
| 3112 | |
| 3113 t->cached_charpos = best_above; | |
| 3114 t->cached_bytepos = best_above_byte; | |
| 3115 | |
| 3116 retval = best_above; | |
| 3117 text_checking_assert (best_above_byte >= best_above); | |
| 3118 goto done; | |
| 3119 } | |
| 3120 | |
| 3121 #ifdef OLD_BYTE_CHAR | |
| 3122 | |
| 771 | 3123 bufmin = buf->text->mule_bufmin; |
| 3124 bufmax = buf->text->mule_bufmax; | |
| 3125 bytmin = buf->text->mule_bytmin; | |
| 3126 bytmax = buf->text->mule_bytmax; | |
| 3127 size = (1 << buf->text->mule_shifter) + !!buf->text->mule_three_p; | |
| 3128 | |
| 3129 /* The basic idea here is that we shift the "known region" up or down | |
| 3130 until it overlaps the specified position. We do this by moving | |
| 3131 the upper bound of the known region up one character at a time, | |
| 3132 and moving the lower bound of the known region up as necessary | |
| 3133 when the size of the character just seen changes. | |
| 3134 | |
| 3135 We optimize this, however, by first shifting the known region to | |
| 826 | 3136 one of the cached points if it's close by. (We don't check BYTE_BEG or |
| 3137 BYTE_Z, even though they're cached; most of the time these will be the | |
| 3138 same as BYTE_BEGV and BYTE_ZV, and when they're not, they're not likely | |
| 771 | 3139 to be used.) */ |
| 3140 | |
| 3141 if (x > bytmax) | |
| 3142 { | |
| 3143 Bytebpos diffmax = x - bytmax; | |
| 826 | 3144 Bytebpos diffpt = x - BYTE_BUF_PT (buf); |
| 3145 Bytebpos diffzv = BYTE_BUF_ZV (buf) - x; | |
| 771 | 3146 /* #### This value could stand some more exploration. */ |
| 3147 Bytecount heuristic_hack = (bytmax - bytmin) >> 2; | |
| 3148 | |
| 3149 /* Check if the position is closer to PT or ZV than to the | |
| 3150 end of the known region. */ | |
| 3151 | |
| 3152 if (diffpt < 0) | |
| 3153 diffpt = -diffpt; | |
| 3154 if (diffzv < 0) | |
| 3155 diffzv = -diffzv; | |
| 3156 | |
| 3157 /* But also implement a heuristic that favors the known region | |
| 826 | 3158 over BYTE_PT or BYTE_ZV. The reason for this is that switching to |
| 3159 BYTE_PT or BYTE_ZV will wipe out the knowledge in the known region, | |
| 771 | 3160 which might be annoying if the known region is large and |
| 826 | 3161 BYTE_PT or BYTE_ZV is not that much closer than the end of the known |
| 771 | 3162 region. */ |
| 3163 | |
| 3164 diffzv += heuristic_hack; | |
| 3165 diffpt += heuristic_hack; | |
| 3166 if (diffpt < diffmax && diffpt <= diffzv) | |
| 3167 { | |
| 3168 bufmax = bufmin = BUF_PT (buf); | |
| 826 | 3169 bytmax = bytmin = BYTE_BUF_PT (buf); |
| 771 | 3170 /* We set the size to 1 even though it doesn't really |
| 3171 matter because the new known region contains no | |
| 3172 characters. We do this because this is the most | |
| 3173 likely size of the characters around the new known | |
| 3174 region, and we avoid potential yuckiness that is | |
| 3175 done when size == 3. */ | |
| 3176 size = 1; | |
| 3177 } | |
| 3178 if (diffzv < diffmax) | |
| 3179 { | |
| 3180 bufmax = bufmin = BUF_ZV (buf); | |
| 826 | 3181 bytmax = bytmin = BYTE_BUF_ZV (buf); |
| 771 | 3182 size = 1; |
| 3183 } | |
| 3184 } | |
| 800 | 3185 #ifdef ERROR_CHECK_TEXT |
| 771 | 3186 else if (x >= bytmin) |
| 2500 | 3187 ABORT (); |
| 771 | 3188 #endif |
| 3189 else | |
| 3190 { | |
| 3191 Bytebpos diffmin = bytmin - x; | |
| 826 | 3192 Bytebpos diffpt = BYTE_BUF_PT (buf) - x; |
| 3193 Bytebpos diffbegv = x - BYTE_BUF_BEGV (buf); | |
| 771 | 3194 /* #### This value could stand some more exploration. */ |
| 3195 Bytecount heuristic_hack = (bytmax - bytmin) >> 2; | |
| 3196 | |
| 3197 if (diffpt < 0) | |
| 3198 diffpt = -diffpt; | |
| 3199 if (diffbegv < 0) | |
| 3200 diffbegv = -diffbegv; | |
| 3201 | |
| 3202 /* But also implement a heuristic that favors the known region -- | |
| 3203 see above. */ | |
| 3204 | |
| 3205 diffbegv += heuristic_hack; | |
| 3206 diffpt += heuristic_hack; | |
| 3207 | |
| 3208 if (diffpt < diffmin && diffpt <= diffbegv) | |
| 3209 { | |
| 3210 bufmax = bufmin = BUF_PT (buf); | |
| 826 | 3211 bytmax = bytmin = BYTE_BUF_PT (buf); |
| 771 | 3212 /* We set the size to 1 even though it doesn't really |
| 3213 matter because the new known region contains no | |
| 3214 characters. We do this because this is the most | |
| 3215 likely size of the characters around the new known | |
| 3216 region, and we avoid potential yuckiness that is | |
| 3217 done when size == 3. */ | |
| 3218 size = 1; | |
| 3219 } | |
| 3220 if (diffbegv < diffmin) | |
| 3221 { | |
| 3222 bufmax = bufmin = BUF_BEGV (buf); | |
| 826 | 3223 bytmax = bytmin = BYTE_BUF_BEGV (buf); |
| 771 | 3224 size = 1; |
| 3225 } | |
| 3226 } | |
| 3227 | |
| 3228 diff_so_far = x > bytmax ? x - bytmax : bytmin - x; | |
| 3229 if (diff_so_far > 50) | |
| 3230 { | |
| 3231 /* If we have to move more than a certain amount, then look | |
| 3232 into our cache. */ | |
| 3233 int minval = INT_MAX; | |
| 3234 int found = 0; | |
| 3235 int i; | |
| 3236 | |
| 3237 add_to_cache = 1; | |
| 3238 /* I considered keeping the positions ordered. This would speed | |
| 3239 up this loop, but updating the cache would take longer, so | |
| 3240 it doesn't seem like it would really matter. */ | |
| 2367 | 3241 for (i = 0; i < NUM_CACHED_POSITIONS; i++) |
| 771 | 3242 { |
| 3243 int diff = buf->text->mule_bytebpos_cache[i] - x; | |
| 3244 | |
| 3245 if (diff < 0) | |
| 3246 diff = -diff; | |
| 3247 if (diff < minval) | |
| 3248 { | |
| 3249 minval = diff; | |
| 3250 found = i; | |
| 3251 } | |
| 3252 } | |
| 3253 | |
| 3254 if (minval < diff_so_far) | |
| 3255 { | |
| 3256 bufmax = bufmin = buf->text->mule_charbpos_cache[found]; | |
| 3257 bytmax = bytmin = buf->text->mule_bytebpos_cache[found]; | |
| 3258 size = 1; | |
| 3259 } | |
| 3260 } | |
| 3261 | |
| 3262 /* It's conceivable that the caching above could lead to X being | |
| 3263 the same as one of the range edges. */ | |
| 3264 if (x >= bytmax) | |
| 3265 { | |
| 3266 Bytebpos newmax; | |
| 3267 Bytecount newsize; | |
| 3268 | |
| 3269 forward_p = 1; | |
| 3270 while (x > bytmax) | |
| 3271 { | |
| 3272 newmax = bytmax; | |
| 3273 | |
| 3274 INC_BYTEBPOS (buf, newmax); | |
| 3275 newsize = newmax - bytmax; | |
| 3276 if (newsize != size) | |
| 3277 { | |
| 3278 bufmin = bufmax; | |
| 3279 bytmin = bytmax; | |
| 3280 size = newsize; | |
| 3281 } | |
| 3282 bytmax = newmax; | |
| 3283 bufmax++; | |
| 3284 } | |
| 3285 retval = bufmax; | |
| 3286 | |
| 3287 /* #### Should go past the found location to reduce the number | |
| 3288 of times that this function is called */ | |
| 3289 } | |
| 3290 else /* x <= bytmin */ | |
| 3291 { | |
| 3292 Bytebpos newmin; | |
| 3293 Bytecount newsize; | |
| 3294 | |
| 3295 forward_p = 0; | |
| 3296 while (x < bytmin) | |
| 3297 { | |
| 3298 newmin = bytmin; | |
| 3299 | |
| 3300 DEC_BYTEBPOS (buf, newmin); | |
| 3301 newsize = bytmin - newmin; | |
| 3302 if (newsize != size) | |
| 3303 { | |
| 3304 bufmax = bufmin; | |
| 3305 bytmax = bytmin; | |
| 3306 size = newsize; | |
| 3307 } | |
| 3308 bytmin = newmin; | |
| 3309 bufmin--; | |
| 3310 } | |
| 3311 retval = bufmin; | |
| 3312 | |
| 3313 /* #### Should go past the found location to reduce the number | |
| 3314 of times that this function is called | |
| 3315 */ | |
| 3316 } | |
| 3317 | |
| 3318 /* If size is three, than we have to max sure that the range we | |
| 3319 discovered isn't too large, because we use a fixed-length | |
| 3320 table to divide by 3. */ | |
| 3321 | |
| 3322 if (size == 3) | |
| 3323 { | |
| 3324 int gap = bytmax - bytmin; | |
| 3325 buf->text->mule_three_p = 1; | |
| 3326 buf->text->mule_shifter = 1; | |
| 3327 | |
| 3328 if (gap > MAX_BYTEBPOS_GAP_SIZE_3) | |
| 3329 { | |
| 3330 if (forward_p) | |
| 3331 { | |
| 3332 bytmin = bytmax - MAX_BYTEBPOS_GAP_SIZE_3; | |
| 3333 bufmin = bufmax - MAX_CHARBPOS_GAP_SIZE_3; | |
| 3334 } | |
| 3335 else | |
| 3336 { | |
| 3337 bytmax = bytmin + MAX_BYTEBPOS_GAP_SIZE_3; | |
| 3338 bufmax = bufmin + MAX_CHARBPOS_GAP_SIZE_3; | |
| 3339 } | |
| 3340 } | |
| 3341 } | |
| 3342 else | |
| 3343 { | |
| 3344 buf->text->mule_three_p = 0; | |
| 3345 if (size == 4) | |
| 3346 buf->text->mule_shifter = 2; | |
| 3347 else | |
| 3348 buf->text->mule_shifter = size - 1; | |
| 3349 } | |
| 3350 | |
| 3351 buf->text->mule_bufmin = bufmin; | |
| 3352 buf->text->mule_bufmax = bufmax; | |
| 3353 buf->text->mule_bytmin = bytmin; | |
| 3354 buf->text->mule_bytmax = bytmax; | |
| 3355 | |
| 3356 if (add_to_cache) | |
| 3357 { | |
| 3358 int replace_loc; | |
| 3359 | |
| 3360 /* We throw away a "random" cached value and replace it with | |
| 3361 the new value. It doesn't actually have to be very random | |
| 3362 at all, just evenly distributed. | |
| 3363 | |
| 3364 #### It would be better to use a least-recently-used algorithm | |
| 3365 or something that tries to space things out, but I'm not sure | |
| 3366 it's worth it to go to the trouble of maintaining that. */ | |
| 3367 not_very_random_number += 621; | |
| 3368 replace_loc = not_very_random_number & 15; | |
| 3369 buf->text->mule_charbpos_cache[replace_loc] = retval; | |
| 3370 buf->text->mule_bytebpos_cache[replace_loc] = x; | |
| 3371 } | |
| 2367 | 3372 #endif /* OLD_BYTE_CHAR */ |
| 3373 | |
| 3374 done: | |
| 1292 | 3375 PROFILE_RECORD_EXITING_SECTION (QSin_char_byte_conversion); |
| 3376 | |
| 771 | 3377 return retval; |
| 3378 } | |
| 3379 | |
| 3380 /* Text of length BYTELENGTH and CHARLENGTH (in different units) | |
| 3381 was inserted at charbpos START. */ | |
| 3382 | |
| 3383 void | |
| 3384 buffer_mule_signal_inserted_region (struct buffer *buf, Charbpos start, | |
| 3385 Bytecount bytelength, | |
| 3386 Charcount charlength) | |
| 3387 { | |
| 2367 | 3388 #ifdef OLD_BYTE_CHAR |
| 771 | 3389 int size = (1 << buf->text->mule_shifter) + !!buf->text->mule_three_p; |
| 2367 | 3390 #endif /* OLD_BYTE_CHAR */ |
| 771 | 3391 int i; |
| 3392 | |
| 3393 /* Adjust the cache of known positions. */ | |
| 2367 | 3394 for (i = 0; i < buf->text->next_cache_pos; i++) |
| 771 | 3395 { |
| 3396 | |
| 3397 if (buf->text->mule_charbpos_cache[i] > start) | |
| 3398 { | |
| 3399 buf->text->mule_charbpos_cache[i] += charlength; | |
| 3400 buf->text->mule_bytebpos_cache[i] += bytelength; | |
| 3401 } | |
| 3402 } | |
| 3403 | |
| 2367 | 3404 /* Adjust the special cached position. */ |
| 3405 | |
| 3406 if (buf->text->cached_charpos > start) | |
| 3407 { | |
| 3408 buf->text->cached_charpos += charlength; | |
| 3409 buf->text->cached_bytepos += bytelength; | |
| 3410 } | |
| 3411 | |
| 3412 #ifdef OLD_BYTE_CHAR | |
| 771 | 3413 if (start >= buf->text->mule_bufmax) |
| 826 | 3414 return; |
| 771 | 3415 |
| 3416 /* The insertion is either before the known region, in which case | |
| 3417 it shoves it forward; or within the known region, in which case | |
| 3418 it shoves the end forward. (But it may make the known region | |
| 3419 inconsistent, so we may have to shorten it.) */ | |
| 3420 | |
| 3421 if (start <= buf->text->mule_bufmin) | |
| 3422 { | |
| 3423 buf->text->mule_bufmin += charlength; | |
| 3424 buf->text->mule_bufmax += charlength; | |
| 3425 buf->text->mule_bytmin += bytelength; | |
| 3426 buf->text->mule_bytmax += bytelength; | |
| 3427 } | |
| 3428 else | |
| 3429 { | |
| 3430 Charbpos end = start + charlength; | |
| 3431 /* the insertion point divides the known region in two. | |
| 3432 Keep the longer half, at least, and expand into the | |
| 3433 inserted chunk as much as possible. */ | |
| 3434 | |
| 3435 if (start - buf->text->mule_bufmin > buf->text->mule_bufmax - start) | |
| 3436 { | |
| 3437 Bytebpos bytestart = (buf->text->mule_bytmin | |
| 3438 + size * (start - buf->text->mule_bufmin)); | |
| 3439 Bytebpos bytenew; | |
| 3440 | |
| 3441 while (start < end) | |
| 3442 { | |
| 3443 bytenew = bytestart; | |
| 3444 INC_BYTEBPOS (buf, bytenew); | |
| 3445 if (bytenew - bytestart != size) | |
| 3446 break; | |
| 3447 start++; | |
| 3448 bytestart = bytenew; | |
| 3449 } | |
| 3450 if (start != end) | |
| 3451 { | |
| 3452 buf->text->mule_bufmax = start; | |
| 3453 buf->text->mule_bytmax = bytestart; | |
| 3454 } | |
| 3455 else | |
| 3456 { | |
| 3457 buf->text->mule_bufmax += charlength; | |
| 3458 buf->text->mule_bytmax += bytelength; | |
| 3459 } | |
| 3460 } | |
| 3461 else | |
| 3462 { | |
| 3463 Bytebpos byteend = (buf->text->mule_bytmin | |
| 3464 + size * (start - buf->text->mule_bufmin) | |
| 3465 + bytelength); | |
| 3466 Bytebpos bytenew; | |
| 3467 | |
| 3468 buf->text->mule_bufmax += charlength; | |
| 3469 buf->text->mule_bytmax += bytelength; | |
| 3470 | |
| 3471 while (end > start) | |
| 3472 { | |
| 3473 bytenew = byteend; | |
| 3474 DEC_BYTEBPOS (buf, bytenew); | |
| 3475 if (byteend - bytenew != size) | |
| 3476 break; | |
| 3477 end--; | |
| 3478 byteend = bytenew; | |
| 3479 } | |
| 3480 if (start != end) | |
| 3481 { | |
| 3482 buf->text->mule_bufmin = end; | |
| 3483 buf->text->mule_bytmin = byteend; | |
| 3484 } | |
| 3485 } | |
| 3486 } | |
| 2367 | 3487 #endif /* OLD_BYTE_CHAR */ |
| 771 | 3488 } |
| 3489 | |
| 826 | 3490 /* Text from START to END (equivalent in Bytebpos's: from BYTE_START to |
| 3491 BYTE_END) was deleted. */ | |
| 771 | 3492 |
| 3493 void | |
| 3494 buffer_mule_signal_deleted_region (struct buffer *buf, Charbpos start, | |
| 826 | 3495 Charbpos end, Bytebpos byte_start, |
| 3496 Bytebpos byte_end) | |
| 771 | 3497 { |
| 3498 int i; | |
| 3499 | |
| 3500 /* Adjust the cache of known positions. */ | |
| 2367 | 3501 for (i = 0; i < buf->text->next_cache_pos; i++) |
| 771 | 3502 { |
| 3503 /* After the end; gets shoved backward */ | |
| 3504 if (buf->text->mule_charbpos_cache[i] > end) | |
| 3505 { | |
| 3506 buf->text->mule_charbpos_cache[i] -= end - start; | |
| 826 | 3507 buf->text->mule_bytebpos_cache[i] -= byte_end - byte_start; |
| 771 | 3508 } |
| 3509 /* In the range; moves to start of range */ | |
| 3510 else if (buf->text->mule_charbpos_cache[i] > start) | |
| 3511 { | |
| 3512 buf->text->mule_charbpos_cache[i] = start; | |
| 826 | 3513 buf->text->mule_bytebpos_cache[i] = byte_start; |
| 771 | 3514 } |
| 3515 } | |
| 3516 | |
| 2367 | 3517 /* Adjust the special cached position. */ |
| 3518 | |
| 3519 /* After the end; gets shoved backward */ | |
| 3520 if (buf->text->cached_charpos > end) | |
| 3521 { | |
| 3522 buf->text->cached_charpos -= end - start; | |
| 3523 buf->text->cached_bytepos -= byte_end - byte_start; | |
| 3524 } | |
| 3525 /* In the range; moves to start of range */ | |
| 3526 else if (buf->text->cached_charpos > start) | |
| 3527 { | |
| 3528 buf->text->cached_charpos = start; | |
| 3529 buf->text->cached_bytepos = byte_start; | |
| 3530 } | |
| 3531 | |
| 3532 #ifdef OLD_BYTE_CHAR | |
| 771 | 3533 /* We don't care about any text after the end of the known region. */ |
| 3534 | |
| 3535 end = min (end, buf->text->mule_bufmax); | |
| 826 | 3536 byte_end = min (byte_end, buf->text->mule_bytmax); |
| 771 | 3537 if (start >= end) |
| 826 | 3538 return; |
| 771 | 3539 |
| 3540 /* The end of the known region offsets by the total amount of deletion, | |
| 3541 since it's all before it. */ | |
| 3542 | |
| 3543 buf->text->mule_bufmax -= end - start; | |
| 826 | 3544 buf->text->mule_bytmax -= byte_end - byte_start; |
| 771 | 3545 |
| 3546 /* Now we don't care about any text after the start of the known region. */ | |
| 3547 | |
| 3548 end = min (end, buf->text->mule_bufmin); | |
| 826 | 3549 byte_end = min (byte_end, buf->text->mule_bytmin); |
| 771 | 3550 if (start < end) |
| 3551 { | |
| 3552 buf->text->mule_bufmin -= end - start; | |
| 826 | 3553 buf->text->mule_bytmin -= byte_end - byte_start; |
| 771 | 3554 } |
| 2367 | 3555 #endif /* OLD_BYTE_CHAR */ |
| 771 | 3556 } |
| 3557 | |
| 3558 #endif /* MULE */ | |
| 3559 | |
| 3560 | |
| 3561 /************************************************************************/ | |
| 3562 /* verifying buffer and string positions */ | |
| 3563 /************************************************************************/ | |
| 3564 | |
| 3565 /* Functions below are tagged with either _byte or _char indicating | |
| 3566 whether they return byte or character positions. For a buffer, | |
| 3567 a character position is a "Charbpos" and a byte position is a "Bytebpos". | |
| 3568 For strings, these are sometimes typed using "Charcount" and | |
| 3569 "Bytecount". */ | |
| 3570 | |
| 3571 /* Flags for the functions below are: | |
| 3572 | |
| 3573 GB_ALLOW_PAST_ACCESSIBLE | |
| 3574 | |
| 3575 Allow positions to range over the entire buffer (BUF_BEG to BUF_Z), | |
| 3576 rather than just the accessible portion (BUF_BEGV to BUF_ZV). | |
| 3577 For strings, this flag has no effect. | |
| 3578 | |
| 3579 GB_COERCE_RANGE | |
| 3580 | |
| 3581 If the position is outside the allowable range, return the lower | |
| 3582 or upper bound of the range, whichever is closer to the specified | |
| 3583 position. | |
| 3584 | |
| 3585 GB_NO_ERROR_IF_BAD | |
| 3586 | |
| 3587 If the position is outside the allowable range, return -1. | |
| 3588 | |
| 3589 GB_NEGATIVE_FROM_END | |
| 3590 | |
| 3591 If a value is negative, treat it as an offset from the end. | |
| 3592 Only applies to strings. | |
| 3593 | |
| 3594 The following additional flags apply only to the functions | |
| 3595 that return ranges: | |
| 3596 | |
| 3597 GB_ALLOW_NIL | |
| 3598 | |
| 3599 Either or both positions can be nil. If FROM is nil, | |
| 3600 FROM_OUT will contain the lower bound of the allowed range. | |
| 3601 If TO is nil, TO_OUT will contain the upper bound of the | |
| 3602 allowed range. | |
| 3603 | |
| 3604 GB_CHECK_ORDER | |
| 3605 | |
| 3606 FROM must contain the lower bound and TO the upper bound | |
| 3607 of the range. If the positions are reversed, an error is | |
| 3608 signalled. | |
| 3609 | |
| 3610 The following is a combination flag: | |
| 3611 | |
| 3612 GB_HISTORICAL_STRING_BEHAVIOR | |
| 3613 | |
| 3614 Equivalent to (GB_NEGATIVE_FROM_END | GB_ALLOW_NIL). | |
| 3615 */ | |
| 3616 | |
| 3617 /* Return a buffer position stored in a Lisp_Object. Full | |
| 3618 error-checking is done on the position. Flags can be specified to | |
| 3619 control the behavior of out-of-range values. The default behavior | |
| 3620 is to require that the position is within the accessible part of | |
| 3621 the buffer (BEGV and ZV), and to signal an error if the position is | |
| 3622 out of range. | |
| 3623 | |
| 3624 */ | |
| 3625 | |
| 3626 Charbpos | |
| 3627 get_buffer_pos_char (struct buffer *b, Lisp_Object pos, unsigned int flags) | |
| 3628 { | |
| 3629 /* Does not GC */ | |
| 3630 Charbpos ind; | |
| 3631 Charbpos min_allowed, max_allowed; | |
| 3632 | |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
3633 CHECK_FIXNUM_COERCE_MARKER (pos); |
|
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
3634 ind = XFIXNUM (pos); |
| 771 | 3635 min_allowed = flags & GB_ALLOW_PAST_ACCESSIBLE ? BUF_BEG (b) : BUF_BEGV (b); |
| 3636 max_allowed = flags & GB_ALLOW_PAST_ACCESSIBLE ? BUF_Z (b) : BUF_ZV (b); | |
| 3637 | |
| 3638 if (ind < min_allowed || ind > max_allowed) | |
| 3639 { | |
| 3640 if (flags & GB_COERCE_RANGE) | |
| 3641 ind = ind < min_allowed ? min_allowed : max_allowed; | |
| 3642 else if (flags & GB_NO_ERROR_IF_BAD) | |
| 3643 ind = -1; | |
| 3644 else | |
| 3645 { | |
| 793 | 3646 Lisp_Object buffer = wrap_buffer (b); |
| 3647 | |
| 771 | 3648 args_out_of_range (buffer, pos); |
| 3649 } | |
| 3650 } | |
| 3651 | |
| 3652 return ind; | |
| 3653 } | |
| 3654 | |
| 3655 Bytebpos | |
| 3656 get_buffer_pos_byte (struct buffer *b, Lisp_Object pos, unsigned int flags) | |
| 3657 { | |
| 3658 Charbpos bpos = get_buffer_pos_char (b, pos, flags); | |
| 3659 if (bpos < 0) /* could happen with GB_NO_ERROR_IF_BAD */ | |
| 3660 return -1; | |
| 3661 return charbpos_to_bytebpos (b, bpos); | |
| 3662 } | |
| 3663 | |
| 3664 /* Return a pair of buffer positions representing a range of text, | |
| 3665 taken from a pair of Lisp_Objects. Full error-checking is | |
| 3666 done on the positions. Flags can be specified to control the | |
| 3667 behavior of out-of-range values. The default behavior is to | |
| 3668 allow the range bounds to be specified in either order | |
| 3669 (however, FROM_OUT will always be the lower bound of the range | |
| 3670 and TO_OUT the upper bound),to require that the positions | |
| 3671 are within the accessible part of the buffer (BEGV and ZV), | |
| 3672 and to signal an error if the positions are out of range. | |
| 3673 */ | |
| 3674 | |
| 3675 void | |
| 3676 get_buffer_range_char (struct buffer *b, Lisp_Object from, Lisp_Object to, | |
| 826 | 3677 Charbpos *from_out, Charbpos *to_out, |
| 3678 unsigned int flags) | |
| 771 | 3679 { |
| 3680 /* Does not GC */ | |
| 3681 Charbpos min_allowed, max_allowed; | |
| 3682 | |
| 3683 min_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ? | |
| 3684 BUF_BEG (b) : BUF_BEGV (b); | |
| 3685 max_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ? | |
| 3686 BUF_Z (b) : BUF_ZV (b); | |
| 3687 | |
| 3688 if (NILP (from) && (flags & GB_ALLOW_NIL)) | |
| 3689 *from_out = min_allowed; | |
| 3690 else | |
| 3691 *from_out = get_buffer_pos_char (b, from, flags | GB_NO_ERROR_IF_BAD); | |
| 3692 | |
| 3693 if (NILP (to) && (flags & GB_ALLOW_NIL)) | |
| 3694 *to_out = max_allowed; | |
| 3695 else | |
| 3696 *to_out = get_buffer_pos_char (b, to, flags | GB_NO_ERROR_IF_BAD); | |
| 3697 | |
| 3698 if ((*from_out < 0 || *to_out < 0) && !(flags & GB_NO_ERROR_IF_BAD)) | |
| 3699 { | |
| 793 | 3700 Lisp_Object buffer = wrap_buffer (b); |
| 3701 | |
| 771 | 3702 args_out_of_range_3 (buffer, from, to); |
| 3703 } | |
| 3704 | |
| 3705 if (*from_out >= 0 && *to_out >= 0 && *from_out > *to_out) | |
| 3706 { | |
| 3707 if (flags & GB_CHECK_ORDER) | |
| 3708 invalid_argument_2 ("start greater than end", from, to); | |
| 3709 else | |
| 3710 { | |
| 3711 Charbpos temp = *from_out; | |
| 3712 *from_out = *to_out; | |
| 3713 *to_out = temp; | |
| 3714 } | |
| 3715 } | |
| 3716 } | |
| 3717 | |
| 3718 void | |
| 3719 get_buffer_range_byte (struct buffer *b, Lisp_Object from, Lisp_Object to, | |
| 826 | 3720 Bytebpos *from_out, Bytebpos *to_out, |
| 3721 unsigned int flags) | |
| 771 | 3722 { |
| 3723 Charbpos s, e; | |
| 3724 | |
| 3725 get_buffer_range_char (b, from, to, &s, &e, flags); | |
| 3726 if (s >= 0) | |
| 3727 *from_out = charbpos_to_bytebpos (b, s); | |
| 3728 else /* could happen with GB_NO_ERROR_IF_BAD */ | |
| 3729 *from_out = -1; | |
| 3730 if (e >= 0) | |
| 3731 *to_out = charbpos_to_bytebpos (b, e); | |
| 3732 else | |
| 3733 *to_out = -1; | |
| 3734 } | |
| 3735 | |
| 3736 static Charcount | |
| 3737 get_string_pos_char_1 (Lisp_Object string, Lisp_Object pos, unsigned int flags, | |
| 3738 Charcount known_length) | |
| 3739 { | |
| 3740 Charcount ccpos; | |
| 3741 Charcount min_allowed = 0; | |
| 3742 Charcount max_allowed = known_length; | |
| 3743 | |
| 3744 /* Computation of KNOWN_LENGTH is potentially expensive so we pass | |
| 3745 it in. */ | |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
3746 CHECK_FIXNUM (pos); |
|
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
3747 ccpos = XFIXNUM (pos); |
| 771 | 3748 if (ccpos < 0 && flags & GB_NEGATIVE_FROM_END) |
| 3749 ccpos += max_allowed; | |
| 3750 | |
| 3751 if (ccpos < min_allowed || ccpos > max_allowed) | |
| 3752 { | |
| 3753 if (flags & GB_COERCE_RANGE) | |
| 3754 ccpos = ccpos < min_allowed ? min_allowed : max_allowed; | |
| 3755 else if (flags & GB_NO_ERROR_IF_BAD) | |
| 3756 ccpos = -1; | |
| 3757 else | |
| 3758 args_out_of_range (string, pos); | |
| 3759 } | |
| 3760 | |
| 3761 return ccpos; | |
| 3762 } | |
| 3763 | |
| 3764 Charcount | |
| 3765 get_string_pos_char (Lisp_Object string, Lisp_Object pos, unsigned int flags) | |
| 3766 { | |
| 3767 return get_string_pos_char_1 (string, pos, flags, | |
| 826 | 3768 string_char_length (string)); |
| 771 | 3769 } |
| 3770 | |
| 3771 Bytecount | |
| 3772 get_string_pos_byte (Lisp_Object string, Lisp_Object pos, unsigned int flags) | |
| 3773 { | |
| 3774 Charcount ccpos = get_string_pos_char (string, pos, flags); | |
| 3775 if (ccpos < 0) /* could happen with GB_NO_ERROR_IF_BAD */ | |
| 3776 return -1; | |
| 793 | 3777 return string_index_char_to_byte (string, ccpos); |
| 771 | 3778 } |
| 3779 | |
| 3780 void | |
| 3781 get_string_range_char (Lisp_Object string, Lisp_Object from, Lisp_Object to, | |
| 3782 Charcount *from_out, Charcount *to_out, | |
| 3783 unsigned int flags) | |
| 3784 { | |
| 3785 Charcount min_allowed = 0; | |
| 826 | 3786 Charcount max_allowed = string_char_length (string); |
| 771 | 3787 |
| 3788 if (NILP (from) && (flags & GB_ALLOW_NIL)) | |
| 3789 *from_out = min_allowed; | |
| 3790 else | |
| 3791 *from_out = get_string_pos_char_1 (string, from, | |
| 3792 flags | GB_NO_ERROR_IF_BAD, | |
| 3793 max_allowed); | |
| 3794 | |
| 3795 if (NILP (to) && (flags & GB_ALLOW_NIL)) | |
| 3796 *to_out = max_allowed; | |
| 3797 else | |
| 3798 *to_out = get_string_pos_char_1 (string, to, | |
| 3799 flags | GB_NO_ERROR_IF_BAD, | |
| 3800 max_allowed); | |
| 3801 | |
| 3802 if ((*from_out < 0 || *to_out < 0) && !(flags & GB_NO_ERROR_IF_BAD)) | |
| 3803 args_out_of_range_3 (string, from, to); | |
| 3804 | |
| 3805 if (*from_out >= 0 && *to_out >= 0 && *from_out > *to_out) | |
| 3806 { | |
| 3807 if (flags & GB_CHECK_ORDER) | |
| 3808 invalid_argument_2 ("start greater than end", from, to); | |
| 3809 else | |
| 3810 { | |
| 3811 Charbpos temp = *from_out; | |
| 3812 *from_out = *to_out; | |
| 3813 *to_out = temp; | |
| 3814 } | |
| 3815 } | |
| 3816 } | |
| 3817 | |
| 3818 void | |
| 3819 get_string_range_byte (Lisp_Object string, Lisp_Object from, Lisp_Object to, | |
| 3820 Bytecount *from_out, Bytecount *to_out, | |
| 3821 unsigned int flags) | |
| 3822 { | |
| 3823 Charcount s, e; | |
| 3824 | |
| 3825 get_string_range_char (string, from, to, &s, &e, flags); | |
| 3826 if (s >= 0) | |
| 793 | 3827 *from_out = string_index_char_to_byte (string, s); |
| 771 | 3828 else /* could happen with GB_NO_ERROR_IF_BAD */ |
| 3829 *from_out = -1; | |
| 3830 if (e >= 0) | |
| 793 | 3831 *to_out = string_index_char_to_byte (string, e); |
| 771 | 3832 else |
| 3833 *to_out = -1; | |
| 3834 | |
| 3835 } | |
| 3836 | |
| 826 | 3837 Charxpos |
| 771 | 3838 get_buffer_or_string_pos_char (Lisp_Object object, Lisp_Object pos, |
| 3839 unsigned int flags) | |
| 3840 { | |
| 3841 return STRINGP (object) ? | |
| 3842 get_string_pos_char (object, pos, flags) : | |
| 3843 get_buffer_pos_char (XBUFFER (object), pos, flags); | |
| 3844 } | |
| 3845 | |
| 826 | 3846 Bytexpos |
| 771 | 3847 get_buffer_or_string_pos_byte (Lisp_Object object, Lisp_Object pos, |
| 3848 unsigned int flags) | |
| 3849 { | |
| 3850 return STRINGP (object) ? | |
| 3851 get_string_pos_byte (object, pos, flags) : | |
| 3852 get_buffer_pos_byte (XBUFFER (object), pos, flags); | |
| 3853 } | |
| 3854 | |
| 3855 void | |
| 3856 get_buffer_or_string_range_char (Lisp_Object object, Lisp_Object from, | |
| 826 | 3857 Lisp_Object to, Charxpos *from_out, |
| 3858 Charxpos *to_out, unsigned int flags) | |
| 771 | 3859 { |
| 3860 if (STRINGP (object)) | |
| 3861 get_string_range_char (object, from, to, from_out, to_out, flags); | |
| 3862 else | |
| 826 | 3863 get_buffer_range_char (XBUFFER (object), from, to, from_out, to_out, |
| 3864 flags); | |
| 771 | 3865 } |
| 3866 | |
| 3867 void | |
| 3868 get_buffer_or_string_range_byte (Lisp_Object object, Lisp_Object from, | |
| 826 | 3869 Lisp_Object to, Bytexpos *from_out, |
| 3870 Bytexpos *to_out, unsigned int flags) | |
| 771 | 3871 { |
| 3872 if (STRINGP (object)) | |
| 3873 get_string_range_byte (object, from, to, from_out, to_out, flags); | |
| 3874 else | |
| 826 | 3875 get_buffer_range_byte (XBUFFER (object), from, to, from_out, to_out, |
| 3876 flags); | |
| 771 | 3877 } |
| 3878 | |
| 826 | 3879 Charxpos |
| 771 | 3880 buffer_or_string_accessible_begin_char (Lisp_Object object) |
| 3881 { | |
| 3882 return STRINGP (object) ? 0 : BUF_BEGV (XBUFFER (object)); | |
| 3883 } | |
| 3884 | |
| 826 | 3885 Charxpos |
| 771 | 3886 buffer_or_string_accessible_end_char (Lisp_Object object) |
| 3887 { | |
| 3888 return STRINGP (object) ? | |
| 826 | 3889 string_char_length (object) : BUF_ZV (XBUFFER (object)); |
| 771 | 3890 } |
| 3891 | |
| 826 | 3892 Bytexpos |
| 771 | 3893 buffer_or_string_accessible_begin_byte (Lisp_Object object) |
| 3894 { | |
| 826 | 3895 return STRINGP (object) ? 0 : BYTE_BUF_BEGV (XBUFFER (object)); |
| 771 | 3896 } |
| 3897 | |
| 826 | 3898 Bytexpos |
| 771 | 3899 buffer_or_string_accessible_end_byte (Lisp_Object object) |
| 3900 { | |
| 3901 return STRINGP (object) ? | |
| 826 | 3902 XSTRING_LENGTH (object) : BYTE_BUF_ZV (XBUFFER (object)); |
| 771 | 3903 } |
| 3904 | |
| 826 | 3905 Charxpos |
| 771 | 3906 buffer_or_string_absolute_begin_char (Lisp_Object object) |
| 3907 { | |
| 3908 return STRINGP (object) ? 0 : BUF_BEG (XBUFFER (object)); | |
| 3909 } | |
| 3910 | |
| 826 | 3911 Charxpos |
| 771 | 3912 buffer_or_string_absolute_end_char (Lisp_Object object) |
| 3913 { | |
| 3914 return STRINGP (object) ? | |
| 826 | 3915 string_char_length (object) : BUF_Z (XBUFFER (object)); |
| 3916 } | |
| 3917 | |
| 3918 Bytexpos | |
| 3919 buffer_or_string_absolute_begin_byte (Lisp_Object object) | |
| 3920 { | |
| 3921 return STRINGP (object) ? 0 : BYTE_BUF_BEG (XBUFFER (object)); | |
| 3922 } | |
| 3923 | |
| 3924 Bytexpos | |
| 3925 buffer_or_string_absolute_end_byte (Lisp_Object object) | |
| 3926 { | |
| 3927 return STRINGP (object) ? | |
| 3928 XSTRING_LENGTH (object) : BYTE_BUF_Z (XBUFFER (object)); | |
| 3929 } | |
| 3930 | |
| 3931 Charbpos | |
| 3932 charbpos_clip_to_bounds (Charbpos lower, Charbpos num, Charbpos upper) | |
| 3933 { | |
| 3934 return (num < lower ? lower : | |
| 3935 num > upper ? upper : | |
| 3936 num); | |
| 771 | 3937 } |
| 3938 | |
| 3939 Bytebpos | |
| 826 | 3940 bytebpos_clip_to_bounds (Bytebpos lower, Bytebpos num, Bytebpos upper) |
| 3941 { | |
| 3942 return (num < lower ? lower : | |
| 3943 num > upper ? upper : | |
| 3944 num); | |
| 3945 } | |
| 3946 | |
| 3947 Charxpos | |
| 3948 charxpos_clip_to_bounds (Charxpos lower, Charxpos num, Charxpos upper) | |
| 771 | 3949 { |
| 826 | 3950 return (num < lower ? lower : |
| 3951 num > upper ? upper : | |
| 3952 num); | |
| 3953 } | |
| 3954 | |
| 3955 Bytexpos | |
| 3956 bytexpos_clip_to_bounds (Bytexpos lower, Bytexpos num, Bytexpos upper) | |
| 3957 { | |
| 3958 return (num < lower ? lower : | |
| 3959 num > upper ? upper : | |
| 3960 num); | |
| 771 | 3961 } |
| 3962 | |
| 826 | 3963 /* These could be implemented in terms of the get_buffer_or_string() |
| 3964 functions above, but those are complicated and handle lots of weird | |
| 3965 cases stemming from uncertain external input. */ | |
| 3966 | |
| 3967 Charxpos | |
| 3968 buffer_or_string_clip_to_accessible_char (Lisp_Object object, Charxpos pos) | |
| 3969 { | |
| 3970 return (charxpos_clip_to_bounds | |
| 3971 (pos, buffer_or_string_accessible_begin_char (object), | |
| 3972 buffer_or_string_accessible_end_char (object))); | |
| 3973 } | |
| 3974 | |
| 3975 Bytexpos | |
| 3976 buffer_or_string_clip_to_accessible_byte (Lisp_Object object, Bytexpos pos) | |
| 771 | 3977 { |
| 826 | 3978 return (bytexpos_clip_to_bounds |
| 3979 (pos, buffer_or_string_accessible_begin_byte (object), | |
| 3980 buffer_or_string_accessible_end_byte (object))); | |
| 3981 } | |
| 3982 | |
| 3983 Charxpos | |
| 3984 buffer_or_string_clip_to_absolute_char (Lisp_Object object, Charxpos pos) | |
| 3985 { | |
| 3986 return (charxpos_clip_to_bounds | |
| 3987 (pos, buffer_or_string_absolute_begin_char (object), | |
| 3988 buffer_or_string_absolute_end_char (object))); | |
| 3989 } | |
| 3990 | |
| 3991 Bytexpos | |
| 3992 buffer_or_string_clip_to_absolute_byte (Lisp_Object object, Bytexpos pos) | |
| 3993 { | |
| 3994 return (bytexpos_clip_to_bounds | |
| 3995 (pos, buffer_or_string_absolute_begin_byte (object), | |
| 3996 buffer_or_string_absolute_end_byte (object))); | |
| 771 | 3997 } |
| 3998 | |
| 3999 | |
| 4000 /************************************************************************/ | |
| 4001 /* Implement TO_EXTERNAL_FORMAT, TO_INTERNAL_FORMAT */ | |
| 4002 /************************************************************************/ | |
| 4003 | |
| 4004 typedef struct | |
| 4005 { | |
| 867 | 4006 Dynarr_declare (Ibyte_dynarr *); |
| 4007 } Ibyte_dynarr_dynarr; | |
| 771 | 4008 |
| 4009 typedef struct | |
| 4010 { | |
| 4011 Dynarr_declare (Extbyte_dynarr *); | |
| 4012 } Extbyte_dynarr_dynarr; | |
| 4013 | |
| 4014 static Extbyte_dynarr_dynarr *conversion_out_dynarr_list; | |
| 867 | 4015 static Ibyte_dynarr_dynarr *conversion_in_dynarr_list; |
| 771 | 4016 |
| 4017 static int dfc_convert_to_external_format_in_use; | |
| 4018 static int dfc_convert_to_internal_format_in_use; | |
| 4019 | |
| 4020 void | |
| 4021 dfc_convert_to_external_format (dfc_conversion_type source_type, | |
| 4022 dfc_conversion_data *source, | |
| 4023 Lisp_Object coding_system, | |
| 4024 dfc_conversion_type sink_type, | |
| 4025 dfc_conversion_data *sink) | |
| 4026 { | |
| 4027 /* It's guaranteed that many callers are not prepared for GC here, | |
| 4028 esp. given that this code conversion occurs in many very hidden | |
| 4029 places. */ | |
| 1292 | 4030 int count; |
| 771 | 4031 Extbyte_dynarr *conversion_out_dynarr; |
| 1292 | 4032 PROFILE_DECLARE (); |
| 4033 | |
| 2367 | 4034 assert (!inhibit_non_essential_conversion_operations); |
| 1292 | 4035 PROFILE_RECORD_ENTERING_SECTION (QSin_internal_external_conversion); |
| 4036 | |
| 4037 count = begin_gc_forbidden (); | |
| 771 | 4038 |
| 4039 type_checking_assert | |
| 4040 (((source_type == DFC_TYPE_DATA) || | |
| 4041 (source_type == DFC_TYPE_LISP_LSTREAM && LSTREAMP (source->lisp_object)) || | |
| 4042 (source_type == DFC_TYPE_LISP_STRING && STRINGP (source->lisp_object))) | |
| 4043 && | |
| 4044 ((sink_type == DFC_TYPE_DATA) || | |
| 4045 (sink_type == DFC_TYPE_LISP_LSTREAM && LSTREAMP (source->lisp_object)))); | |
| 4046 | |
| 4047 if (Dynarr_length (conversion_out_dynarr_list) <= | |
| 4048 dfc_convert_to_external_format_in_use) | |
| 4049 Dynarr_add (conversion_out_dynarr_list, Dynarr_new (Extbyte)); | |
| 4050 conversion_out_dynarr = Dynarr_at (conversion_out_dynarr_list, | |
| 4051 dfc_convert_to_external_format_in_use); | |
| 4052 Dynarr_reset (conversion_out_dynarr); | |
| 4053 | |
| 853 | 4054 internal_bind_int (&dfc_convert_to_external_format_in_use, |
| 4055 dfc_convert_to_external_format_in_use + 1); | |
| 4056 | |
| 771 | 4057 coding_system = get_coding_system_for_text_file (coding_system, 0); |
| 4058 | |
| 4059 /* Here we optimize in the case where the coding system does no | |
| 4060 conversion. However, we don't want to optimize in case the source | |
| 4061 or sink is an lstream, since writing to an lstream can cause a | |
| 4062 garbage collection, and this could be problematic if the source | |
| 4063 is a lisp string. */ | |
| 4064 if (source_type != DFC_TYPE_LISP_LSTREAM && | |
| 4065 sink_type != DFC_TYPE_LISP_LSTREAM && | |
| 4066 coding_system_is_binary (coding_system)) | |
| 4067 { | |
| 867 | 4068 const Ibyte *ptr; |
| 771 | 4069 Bytecount len; |
| 4070 | |
| 4071 if (source_type == DFC_TYPE_LISP_STRING) | |
| 4072 { | |
| 4073 ptr = XSTRING_DATA (source->lisp_object); | |
| 4074 len = XSTRING_LENGTH (source->lisp_object); | |
| 4075 } | |
| 4076 else | |
| 4077 { | |
| 867 | 4078 ptr = (Ibyte *) source->data.ptr; |
| 771 | 4079 len = source->data.len; |
| 4080 } | |
| 4081 | |
| 4082 #ifdef MULE | |
| 4083 { | |
| 867 | 4084 const Ibyte *end; |
| 771 | 4085 for (end = ptr + len; ptr < end;) |
| 4086 { | |
| 867 | 4087 Ibyte c = |
| 826 | 4088 (byte_ascii_p (*ptr)) ? *ptr : |
| 771 | 4089 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) : |
| 4090 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) : | |
| 4091 '~'; | |
| 4092 | |
| 4093 Dynarr_add (conversion_out_dynarr, (Extbyte) c); | |
| 867 | 4094 INC_IBYTEPTR (ptr); |
| 771 | 4095 } |
| 800 | 4096 text_checking_assert (ptr == end); |
| 771 | 4097 } |
| 4098 #else | |
| 4099 Dynarr_add_many (conversion_out_dynarr, ptr, len); | |
| 4100 #endif | |
| 4101 | |
| 4102 } | |
| 1315 | 4103 #ifdef WIN32_ANY |
| 771 | 4104 /* Optimize the common case involving Unicode where only ASCII is involved */ |
| 4105 else if (source_type != DFC_TYPE_LISP_LSTREAM && | |
| 4106 sink_type != DFC_TYPE_LISP_LSTREAM && | |
| 4107 dfc_coding_system_is_unicode (coding_system)) | |
| 4108 { | |
| 867 | 4109 const Ibyte *ptr, *p; |
| 771 | 4110 Bytecount len; |
| 867 | 4111 const Ibyte *end; |
| 771 | 4112 |
| 4113 if (source_type == DFC_TYPE_LISP_STRING) | |
| 4114 { | |
| 4115 ptr = XSTRING_DATA (source->lisp_object); | |
| 4116 len = XSTRING_LENGTH (source->lisp_object); | |
| 4117 } | |
| 4118 else | |
| 4119 { | |
| 867 | 4120 ptr = (Ibyte *) source->data.ptr; |
| 771 | 4121 len = source->data.len; |
| 4122 } | |
| 4123 end = ptr + len; | |
| 4124 | |
| 4125 for (p = ptr; p < end; p++) | |
| 4126 { | |
| 826 | 4127 if (!byte_ascii_p (*p)) |
| 771 | 4128 goto the_hard_way; |
| 4129 } | |
| 4130 | |
| 4131 for (p = ptr; p < end; p++) | |
| 4132 { | |
| 4133 Dynarr_add (conversion_out_dynarr, (Extbyte) (*p)); | |
| 4134 Dynarr_add (conversion_out_dynarr, (Extbyte) '\0'); | |
| 4135 } | |
| 4136 } | |
| 1315 | 4137 #endif /* WIN32_ANY */ |
| 771 | 4138 else |
| 4139 { | |
| 4140 Lisp_Object streams_to_delete[3]; | |
| 4141 int delete_count; | |
| 4142 Lisp_Object instream, outstream; | |
| 4143 Lstream *reader, *writer; | |
| 4144 | |
| 1315 | 4145 #ifdef WIN32_ANY |
| 771 | 4146 the_hard_way: |
| 1315 | 4147 #endif /* WIN32_ANY */ |
| 771 | 4148 delete_count = 0; |
| 4149 if (source_type == DFC_TYPE_LISP_LSTREAM) | |
| 4150 instream = source->lisp_object; | |
| 4151 else if (source_type == DFC_TYPE_DATA) | |
| 4152 streams_to_delete[delete_count++] = instream = | |
| 4153 make_fixed_buffer_input_stream (source->data.ptr, source->data.len); | |
| 4154 else | |
| 4155 { | |
| 4156 type_checking_assert (source_type == DFC_TYPE_LISP_STRING); | |
| 4157 streams_to_delete[delete_count++] = instream = | |
| 4158 /* This will GCPRO the Lisp string */ | |
| 4159 make_lisp_string_input_stream (source->lisp_object, 0, -1); | |
| 4160 } | |
| 4161 | |
| 4162 if (sink_type == DFC_TYPE_LISP_LSTREAM) | |
| 4163 outstream = sink->lisp_object; | |
| 4164 else | |
| 4165 { | |
| 4166 type_checking_assert (sink_type == DFC_TYPE_DATA); | |
| 4167 streams_to_delete[delete_count++] = outstream = | |
| 4168 make_dynarr_output_stream | |
| 4169 ((unsigned_char_dynarr *) conversion_out_dynarr); | |
| 4170 } | |
| 4171 | |
| 4172 streams_to_delete[delete_count++] = outstream = | |
| 800 | 4173 make_coding_output_stream (XLSTREAM (outstream), coding_system, |
| 4174 CODING_ENCODE, 0); | |
| 771 | 4175 |
| 4176 reader = XLSTREAM (instream); | |
| 4177 writer = XLSTREAM (outstream); | |
| 4178 /* decoding_stream will gc-protect outstream */ | |
| 1204 | 4179 { |
| 4180 struct gcpro gcpro1, gcpro2; | |
| 4181 GCPRO2 (instream, outstream); | |
| 4182 | |
| 4183 while (1) | |
| 4184 { | |
| 4185 Bytecount size_in_bytes; | |
| 4186 char tempbuf[1024]; /* some random amount */ | |
| 4187 | |
| 4188 size_in_bytes = Lstream_read (reader, tempbuf, sizeof (tempbuf)); | |
| 4189 | |
| 4190 if (size_in_bytes == 0) | |
| 4191 break; | |
| 4192 else if (size_in_bytes < 0) | |
| 4193 signal_error (Qtext_conversion_error, | |
| 4194 "Error converting to external format", Qunbound); | |
| 4195 | |
| 4196 if (Lstream_write (writer, tempbuf, size_in_bytes) < 0) | |
| 4197 signal_error (Qtext_conversion_error, | |
| 4198 "Error converting to external format", Qunbound); | |
| 4199 } | |
| 4200 | |
| 4201 /* Closing writer will close any stream at the other end of writer. */ | |
| 4202 Lstream_close (writer); | |
| 4203 Lstream_close (reader); | |
| 4204 UNGCPRO; | |
| 4205 } | |
| 771 | 4206 |
| 4207 /* The idea is that this function will create no garbage. */ | |
| 4208 while (delete_count) | |
| 4209 Lstream_delete (XLSTREAM (streams_to_delete [--delete_count])); | |
| 4210 } | |
| 4211 | |
| 4212 unbind_to (count); | |
| 4213 | |
| 4214 if (sink_type != DFC_TYPE_LISP_LSTREAM) | |
| 4215 { | |
| 4216 sink->data.len = Dynarr_length (conversion_out_dynarr); | |
| 4217 /* double zero-extend because we may be dealing with Unicode data */ | |
| 4218 Dynarr_add (conversion_out_dynarr, '\0'); | |
| 4219 Dynarr_add (conversion_out_dynarr, '\0'); | |
| 4967 | 4220 sink->data.ptr = Dynarr_begin (conversion_out_dynarr); |
| 771 | 4221 } |
| 1292 | 4222 |
| 4223 PROFILE_RECORD_EXITING_SECTION (QSin_internal_external_conversion); | |
| 771 | 4224 } |
| 4225 | |
| 4226 void | |
| 4227 dfc_convert_to_internal_format (dfc_conversion_type source_type, | |
| 4228 dfc_conversion_data *source, | |
| 4229 Lisp_Object coding_system, | |
| 4230 dfc_conversion_type sink_type, | |
| 4231 dfc_conversion_data *sink) | |
| 4232 { | |
| 4233 /* It's guaranteed that many callers are not prepared for GC here, | |
| 4234 esp. given that this code conversion occurs in many very hidden | |
| 4235 places. */ | |
| 1292 | 4236 int count; |
| 867 | 4237 Ibyte_dynarr *conversion_in_dynarr; |
| 2421 | 4238 Lisp_Object underlying_cs; |
| 1292 | 4239 PROFILE_DECLARE (); |
| 4240 | |
| 2367 | 4241 assert (!inhibit_non_essential_conversion_operations); |
| 1292 | 4242 PROFILE_RECORD_ENTERING_SECTION (QSin_internal_external_conversion); |
| 4243 | |
| 4244 count = begin_gc_forbidden (); | |
| 771 | 4245 |
| 4246 type_checking_assert | |
| 4247 ((source_type == DFC_TYPE_DATA || | |
| 4248 source_type == DFC_TYPE_LISP_LSTREAM) | |
| 4249 && | |
| 4250 (sink_type == DFC_TYPE_DATA || | |
| 4251 sink_type == DFC_TYPE_LISP_LSTREAM)); | |
| 4252 | |
| 4253 if (Dynarr_length (conversion_in_dynarr_list) <= | |
| 4254 dfc_convert_to_internal_format_in_use) | |
| 867 | 4255 Dynarr_add (conversion_in_dynarr_list, Dynarr_new (Ibyte)); |
| 771 | 4256 conversion_in_dynarr = Dynarr_at (conversion_in_dynarr_list, |
| 4257 dfc_convert_to_internal_format_in_use); | |
| 4258 Dynarr_reset (conversion_in_dynarr); | |
| 4259 | |
| 853 | 4260 internal_bind_int (&dfc_convert_to_internal_format_in_use, |
| 4261 dfc_convert_to_internal_format_in_use + 1); | |
| 4262 | |
| 2421 | 4263 /* The second call does the equivalent of both calls, but we need |
| 4264 the result after the first call (which wraps just a to-text | |
| 4265 converter) as well as the result after the second call (which | |
| 4266 also wraps an EOL-detection converter). */ | |
| 4267 underlying_cs = get_coding_system_for_text_file (coding_system, 0); | |
| 4268 coding_system = get_coding_system_for_text_file (underlying_cs, 1); | |
| 771 | 4269 |
| 4270 if (source_type != DFC_TYPE_LISP_LSTREAM && | |
| 4271 sink_type != DFC_TYPE_LISP_LSTREAM && | |
| 2421 | 4272 coding_system_is_binary (underlying_cs)) |
| 771 | 4273 { |
| 4274 #ifdef MULE | |
| 2421 | 4275 const Ibyte *ptr; |
| 771 | 4276 Bytecount len = source->data.len; |
| 2421 | 4277 const Ibyte *end; |
| 4278 | |
| 4279 /* Make sure no EOL conversion is needed. With a little work we | |
| 4280 could handle EOL conversion as well but it may not be needed as an | |
| 4281 optimization. */ | |
| 4282 if (!EQ (coding_system, underlying_cs)) | |
| 4283 { | |
| 4284 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len; | |
| 4285 ptr < end; ptr++) | |
| 4286 { | |
| 4287 if (*ptr == '\r' || *ptr == '\n') | |
| 4288 goto the_hard_way; | |
| 4289 } | |
| 4290 } | |
| 4291 | |
| 4292 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len; | |
| 4293 ptr < end; ptr++) | |
| 771 | 4294 { |
| 867 | 4295 Ibyte c = *ptr; |
| 771 | 4296 |
| 826 | 4297 if (byte_ascii_p (c)) |
| 771 | 4298 Dynarr_add (conversion_in_dynarr, c); |
| 826 | 4299 else if (byte_c1_p (c)) |
| 771 | 4300 { |
| 4301 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_CONTROL_1); | |
| 4302 Dynarr_add (conversion_in_dynarr, c + 0x20); | |
| 4303 } | |
| 4304 else | |
| 4305 { | |
| 4306 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_LATIN_ISO8859_1); | |
| 4307 Dynarr_add (conversion_in_dynarr, c); | |
| 4308 } | |
| 4309 } | |
| 4310 #else | |
| 4311 Dynarr_add_many (conversion_in_dynarr, source->data.ptr, source->data.len); | |
| 4312 #endif | |
| 4313 } | |
| 1315 | 4314 #ifdef WIN32_ANY |
| 1292 | 4315 /* Optimize the common case involving Unicode where only ASCII/Latin-1 is |
| 4316 involved */ | |
| 771 | 4317 else if (source_type != DFC_TYPE_LISP_LSTREAM && |
| 4318 sink_type != DFC_TYPE_LISP_LSTREAM && | |
| 2421 | 4319 dfc_coding_system_is_unicode (underlying_cs)) |
| 771 | 4320 { |
| 2421 | 4321 const Ibyte *ptr; |
| 771 | 4322 Bytecount len = source->data.len; |
| 2421 | 4323 const Ibyte *end; |
| 771 | 4324 |
| 4325 if (len & 1) | |
| 4326 goto the_hard_way; | |
| 4327 | |
| 2421 | 4328 /* Make sure only ASCII/Latin-1 is involved */ |
| 4329 for (ptr = (const Ibyte *) source->data.ptr + 1, end = ptr + len; | |
| 4330 ptr < end; ptr += 2) | |
| 771 | 4331 { |
| 4332 if (*ptr) | |
| 4333 goto the_hard_way; | |
| 4334 } | |
| 4335 | |
| 2421 | 4336 /* Make sure no EOL conversion is needed. With a little work we |
| 4337 could handle EOL conversion as well but it may not be needed as an | |
| 4338 optimization. */ | |
| 4339 if (!EQ (coding_system, underlying_cs)) | |
| 4340 { | |
| 4341 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len; | |
| 4342 ptr < end; ptr += 2) | |
| 4343 { | |
| 4344 if (*ptr == '\r' || *ptr == '\n') | |
| 4345 goto the_hard_way; | |
| 4346 } | |
| 4347 } | |
| 4348 | |
| 4349 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len; | |
| 4350 ptr < end; ptr += 2) | |
| 771 | 4351 { |
| 867 | 4352 Ibyte c = *ptr; |
| 771 | 4353 |
| 826 | 4354 if (byte_ascii_p (c)) |
| 771 | 4355 Dynarr_add (conversion_in_dynarr, c); |
| 4356 #ifdef MULE | |
| 826 | 4357 else if (byte_c1_p (c)) |
| 771 | 4358 { |
| 4359 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_CONTROL_1); | |
| 4360 Dynarr_add (conversion_in_dynarr, c + 0x20); | |
| 4361 } | |
| 4362 else | |
| 4363 { | |
| 4364 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_LATIN_ISO8859_1); | |
| 4365 Dynarr_add (conversion_in_dynarr, c); | |
| 4366 } | |
| 4367 #endif /* MULE */ | |
| 4368 } | |
| 4369 } | |
| 1315 | 4370 #endif /* WIN32_ANY */ |
| 771 | 4371 else |
| 4372 { | |
| 4373 Lisp_Object streams_to_delete[3]; | |
| 4374 int delete_count; | |
| 4375 Lisp_Object instream, outstream; | |
| 4376 Lstream *reader, *writer; | |
| 4377 | |
| 2421 | 4378 #if defined (WIN32_ANY) || defined (MULE) |
| 771 | 4379 the_hard_way: |
| 2421 | 4380 #endif |
| 771 | 4381 delete_count = 0; |
| 4382 if (source_type == DFC_TYPE_LISP_LSTREAM) | |
| 4383 instream = source->lisp_object; | |
| 4384 else | |
| 4385 { | |
| 4386 type_checking_assert (source_type == DFC_TYPE_DATA); | |
| 4387 streams_to_delete[delete_count++] = instream = | |
| 4388 make_fixed_buffer_input_stream (source->data.ptr, source->data.len); | |
| 4389 } | |
| 4390 | |
| 4391 if (sink_type == DFC_TYPE_LISP_LSTREAM) | |
| 4392 outstream = sink->lisp_object; | |
| 4393 else | |
| 4394 { | |
| 4395 type_checking_assert (sink_type == DFC_TYPE_DATA); | |
| 4396 streams_to_delete[delete_count++] = outstream = | |
| 4397 make_dynarr_output_stream | |
| 4398 ((unsigned_char_dynarr *) conversion_in_dynarr); | |
| 4399 } | |
| 4400 | |
| 4401 streams_to_delete[delete_count++] = outstream = | |
| 800 | 4402 make_coding_output_stream (XLSTREAM (outstream), coding_system, |
| 4403 CODING_DECODE, 0); | |
| 771 | 4404 |
| 4405 reader = XLSTREAM (instream); | |
| 4406 writer = XLSTREAM (outstream); | |
| 1204 | 4407 { |
| 4408 struct gcpro gcpro1, gcpro2; | |
| 4409 /* outstream will gc-protect its sink stream, if necessary */ | |
| 4410 GCPRO2 (instream, outstream); | |
| 4411 | |
| 4412 while (1) | |
| 4413 { | |
| 4414 Bytecount size_in_bytes; | |
| 4415 char tempbuf[1024]; /* some random amount */ | |
| 4416 | |
| 4417 size_in_bytes = Lstream_read (reader, tempbuf, sizeof (tempbuf)); | |
| 4418 | |
| 4419 if (size_in_bytes == 0) | |
| 4420 break; | |
| 4421 else if (size_in_bytes < 0) | |
| 4422 signal_error (Qtext_conversion_error, | |
| 4423 "Error converting to internal format", Qunbound); | |
| 4424 | |
| 4425 if (Lstream_write (writer, tempbuf, size_in_bytes) < 0) | |
| 4426 signal_error (Qtext_conversion_error, | |
| 4427 "Error converting to internal format", Qunbound); | |
| 4428 } | |
| 4429 | |
| 4430 /* Closing writer will close any stream at the other end of writer. */ | |
| 4431 Lstream_close (writer); | |
| 4432 Lstream_close (reader); | |
| 4433 UNGCPRO; | |
| 4434 } | |
| 771 | 4435 |
| 4436 /* The idea is that this function will create no garbage. */ | |
| 4437 while (delete_count) | |
| 4438 Lstream_delete (XLSTREAM (streams_to_delete [--delete_count])); | |
| 4439 } | |
| 4440 | |
| 4441 unbind_to (count); | |
| 4442 | |
| 4443 if (sink_type != DFC_TYPE_LISP_LSTREAM) | |
| 4444 { | |
| 4445 sink->data.len = Dynarr_length (conversion_in_dynarr); | |
| 4446 Dynarr_add (conversion_in_dynarr, '\0'); /* remember to NUL-terminate! */ | |
| 4447 /* The macros don't currently distinguish between internal and | |
| 4448 external sinks, and allocate and copy two extra bytes in both | |
| 4449 cases. So we add a second zero, just like for external data | |
| 4450 (in that case, because we may be converting to Unicode). */ | |
| 4451 Dynarr_add (conversion_in_dynarr, '\0'); | |
| 4967 | 4452 sink->data.ptr = Dynarr_begin (conversion_in_dynarr); |
| 771 | 4453 } |
| 1292 | 4454 |
| 4455 PROFILE_RECORD_EXITING_SECTION (QSin_internal_external_conversion); | |
| 771 | 4456 } |
| 4457 | |
| 1318 | 4458 /* ----------------------------------------------------------------------- */ |
| 2367 | 4459 /* Alloca-conversion helpers */ |
| 4460 /* ----------------------------------------------------------------------- */ | |
| 4461 | |
| 4462 /* For alloca(), things are trickier because the calling function needs to | |
| 4463 allocate. This means that the caller needs to do the following: | |
| 4464 | |
| 4465 (a) invoke us to do the conversion, remember the data and return the size. | |
| 4466 (b) alloca() the proper size. | |
| 4467 (c) invoke us again to copy the data. | |
| 4468 | |
| 4469 We need to handle the possibility of two or more invocations of the | |
| 4470 converter in the same expression. In such cases it's conceivable that | |
| 4471 the evaluation of the sub-expressions will be overlapping (e.g. one size | |
| 4472 function called, then the other one called, then the copy functions | |
| 4473 called). To handle this, we keep a list of active data, indexed by the | |
| 4474 src expression. (We use the stringize operator to avoid evaluating the | |
| 4475 expression multiple times.) If the caller uses the exact same src | |
| 4476 expression twice in two converter calls in the same subexpression, we | |
| 2500 | 4477 will lose, but at least we can check for this and ABORT(). We could |
| 2367 | 4478 conceivably try to index on other parameters as well, but there is not |
| 4479 really any point. */ | |
| 4480 | |
| 4481 alloca_convert_vals_dynarr *active_alloca_convert; | |
| 4482 | |
| 4483 int | |
| 4484 find_pos_of_existing_active_alloca_convert (const char *srctext) | |
| 4485 { | |
| 4486 alloca_convert_vals *vals = NULL; | |
| 4487 int i; | |
| 4488 | |
| 4489 if (!active_alloca_convert) | |
| 4490 active_alloca_convert = Dynarr_new (alloca_convert_vals); | |
| 4491 | |
| 4492 for (i = 0; i < Dynarr_length (active_alloca_convert); i++) | |
| 4493 { | |
| 4494 vals = Dynarr_atp (active_alloca_convert, i); | |
| 2385 | 4495 /* On my system, two different occurrences of the same stringized |
| 4496 argument always point to the same string. However, on someone | |
| 4497 else's system, that wasn't the case. We check for equality | |
| 4498 first, since it seems systems work my way more than the other | |
| 4499 way. */ | |
| 4500 if (vals->srctext == srctext || !strcmp (vals->srctext, srctext)) | |
| 2367 | 4501 return i; |
| 4502 } | |
| 4503 | |
| 4504 return -1; | |
| 4505 } | |
| 4506 | |
| 4507 /* ----------------------------------------------------------------------- */ | |
| 1318 | 4508 /* New-style DFC converters (data is returned rather than stored into var) */ |
| 4509 /* ----------------------------------------------------------------------- */ | |
| 4510 | |
| 4511 /* We handle here the cases where SRC is a Lisp_Object, internal data | |
| 4512 (sized or unsized), or external data (sized or unsized), and return type | |
| 4513 is unsized alloca() or malloc() data. If the return type is a | |
|
4953
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
4514 Lisp_Object, use build_extstring() for unsized external data, |
|
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
4515 make_extstring() for sized external data. If the return type needs to |
| 1318 | 4516 be sized data, use the *_TO_SIZED_*() macros, and for other more |
| 4517 complicated cases, use the original TO_*_FORMAT() macros. */ | |
| 4518 | |
| 4519 static void | |
| 4520 new_dfc_convert_now_damn_it (const void *src, Bytecount src_size, | |
| 4521 enum new_dfc_src_type type, | |
| 4522 void **dst, Bytecount *dst_size, | |
| 4523 Lisp_Object codesys) | |
| 4524 { | |
| 4525 /* #### In the case of alloca(), it would be a bit more efficient, for | |
| 4526 small strings, to use static Dynarr's like are used internally in | |
| 4527 TO_*_FORMAT(), or some other way of avoiding malloc() followed by | |
| 4528 free(). I doubt it really matters, though. */ | |
| 4529 | |
| 4530 switch (type) | |
| 4531 { | |
| 4532 case DFC_EXTERNAL: | |
| 4533 TO_INTERNAL_FORMAT (C_STRING, src, | |
| 4534 MALLOC, (*dst, *dst_size), codesys); | |
| 4535 break; | |
| 4536 | |
| 4537 case DFC_SIZED_EXTERNAL: | |
| 4538 TO_INTERNAL_FORMAT (DATA, (src, src_size), | |
| 4539 MALLOC, (*dst, *dst_size), codesys); | |
| 4540 break; | |
| 4541 | |
| 4542 case DFC_INTERNAL: | |
| 4543 TO_EXTERNAL_FORMAT (C_STRING, src, | |
| 4544 MALLOC, (*dst, *dst_size), codesys); | |
| 4545 break; | |
| 4546 | |
| 4547 case DFC_SIZED_INTERNAL: | |
| 4548 TO_EXTERNAL_FORMAT (DATA, (src, src_size), | |
| 4549 MALLOC, (*dst, *dst_size), codesys); | |
| 4550 break; | |
| 4551 | |
| 4552 case DFC_LISP_STRING: | |
| 5013 | 4553 TO_EXTERNAL_FORMAT (LISP_STRING, GET_LISP_FROM_VOID (src), |
| 1318 | 4554 MALLOC, (*dst, *dst_size), codesys); |
| 4555 break; | |
| 4556 | |
| 4557 default: | |
| 2500 | 4558 ABORT (); |
| 1318 | 4559 } |
| 2367 | 4560 |
| 4561 /* The size is always + 2 because we have double zero-termination at the | |
| 4562 end of all data (for Unicode-correctness). */ | |
| 4563 *dst_size += 2; | |
| 4564 } | |
| 4565 | |
| 4566 Bytecount | |
| 4567 new_dfc_convert_size (const char *srctext, const void *src, | |
| 4568 Bytecount src_size, enum new_dfc_src_type type, | |
| 4569 Lisp_Object codesys) | |
| 4570 { | |
| 4571 alloca_convert_vals vals; | |
| 4572 | |
| 2721 | 4573 int i = find_pos_of_existing_active_alloca_convert (srctext); |
| 4574 assert (i < 0); | |
| 2367 | 4575 |
| 4576 vals.srctext = srctext; | |
| 4577 | |
| 4578 new_dfc_convert_now_damn_it (src, src_size, type, &vals.dst, &vals.dst_size, | |
| 4579 codesys); | |
| 4580 | |
| 4581 Dynarr_add (active_alloca_convert, vals); | |
| 4582 return vals.dst_size; | |
| 4583 } | |
| 4584 | |
| 4585 void * | |
| 4586 new_dfc_convert_copy_data (const char *srctext, void *alloca_data) | |
| 4587 { | |
| 4588 alloca_convert_vals *vals; | |
| 4589 int i = find_pos_of_existing_active_alloca_convert (srctext); | |
| 4590 | |
| 4591 assert (i >= 0); | |
| 4592 vals = Dynarr_atp (active_alloca_convert, i); | |
| 4593 assert (alloca_data); | |
| 4594 memcpy (alloca_data, vals->dst, vals->dst_size); | |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4967
diff
changeset
|
4595 xfree (vals->dst); |
| 2367 | 4596 Dynarr_delete (active_alloca_convert, i); |
| 4597 return alloca_data; | |
| 1318 | 4598 } |
| 4599 | |
| 4600 void * | |
| 4601 new_dfc_convert_malloc (const void *src, Bytecount src_size, | |
| 4602 enum new_dfc_src_type type, Lisp_Object codesys) | |
| 4603 { | |
| 4604 void *dst; | |
| 4605 Bytecount dst_size; | |
| 4606 | |
| 4607 new_dfc_convert_now_damn_it (src, src_size, type, &dst, &dst_size, codesys); | |
| 4608 return dst; | |
| 4609 } | |
| 4610 | |
| 771 | 4611 |
| 4612 /************************************************************************/ | |
| 867 | 4613 /* Basic Ichar functions */ |
| 771 | 4614 /************************************************************************/ |
| 4615 | |
| 4616 #ifdef MULE | |
| 4617 | |
| 4618 /* Convert a non-ASCII Mule character C into a one-character Mule-encoded | |
| 4619 string in STR. Returns the number of bytes stored. | |
| 867 | 4620 Do not call this directly. Use the macro set_itext_ichar() instead. |
| 771 | 4621 */ |
| 4622 | |
| 4623 Bytecount | |
| 867 | 4624 non_ascii_set_itext_ichar (Ibyte *str, Ichar c) |
| 771 | 4625 { |
| 867 | 4626 Ibyte *p; |
| 4627 Ibyte lb; | |
| 771 | 4628 int c1, c2; |
| 4629 Lisp_Object charset; | |
| 4630 | |
| 4631 p = str; | |
| 867 | 4632 BREAKUP_ICHAR (c, charset, c1, c2); |
| 4633 lb = ichar_leading_byte (c); | |
| 826 | 4634 if (leading_byte_private_p (lb)) |
| 4635 *p++ = private_leading_byte_prefix (lb); | |
| 771 | 4636 *p++ = lb; |
| 4637 if (EQ (charset, Vcharset_control_1)) | |
| 4638 c1 += 0x20; | |
| 4639 *p++ = c1 | 0x80; | |
| 4640 if (c2) | |
| 4641 *p++ = c2 | 0x80; | |
| 4642 | |
| 4643 return (p - str); | |
| 4644 } | |
| 4645 | |
| 4646 /* Return the first character from a Mule-encoded string in STR, | |
| 4647 assuming it's non-ASCII. Do not call this directly. | |
| 867 | 4648 Use the macro itext_ichar() instead. */ |
| 4649 | |
| 4650 Ichar | |
| 4651 non_ascii_itext_ichar (const Ibyte *str) | |
| 771 | 4652 { |
| 867 | 4653 Ibyte i0 = *str, i1, i2 = 0; |
| 771 | 4654 Lisp_Object charset; |
| 4655 | |
| 4656 if (i0 == LEADING_BYTE_CONTROL_1) | |
| 867 | 4657 return (Ichar) (*++str - 0x20); |
| 771 | 4658 |
| 826 | 4659 if (leading_byte_prefix_p (i0)) |
| 771 | 4660 i0 = *++str; |
| 4661 | |
| 4662 i1 = *++str & 0x7F; | |
| 4663 | |
| 826 | 4664 charset = charset_by_leading_byte (i0); |
| 771 | 4665 if (XCHARSET_DIMENSION (charset) == 2) |
| 4666 i2 = *++str & 0x7F; | |
| 4667 | |
| 867 | 4668 return make_ichar (charset, i1, i2); |
| 771 | 4669 } |
| 4670 | |
| 867 | 4671 /* Return whether CH is a valid Ichar, assuming it's non-ASCII. |
| 4672 Do not call this directly. Use the macro valid_ichar_p() instead. */ | |
| 771 | 4673 |
| 4674 int | |
| 867 | 4675 non_ascii_valid_ichar_p (Ichar ch) |
| 771 | 4676 { |
| 4677 int f1, f2, f3; | |
| 4678 | |
| 3498 | 4679 /* Must have only lowest 21 bits set */ |
| 4680 if (ch & ~0x1FFFFF) | |
| 771 | 4681 return 0; |
| 4682 | |
| 867 | 4683 f1 = ichar_field1 (ch); |
| 4684 f2 = ichar_field2 (ch); | |
| 4685 f3 = ichar_field3 (ch); | |
| 771 | 4686 |
| 4687 if (f1 == 0) | |
| 4688 { | |
| 4689 /* dimension-1 char */ | |
| 4690 Lisp_Object charset; | |
| 4691 | |
| 4692 /* leading byte must be correct */ | |
| 867 | 4693 if (f2 < MIN_ICHAR_FIELD2_OFFICIAL || |
| 4694 (f2 > MAX_ICHAR_FIELD2_OFFICIAL && f2 < MIN_ICHAR_FIELD2_PRIVATE) || | |
| 4695 f2 > MAX_ICHAR_FIELD2_PRIVATE) | |
| 771 | 4696 return 0; |
| 4697 /* octet not out of range */ | |
| 4698 if (f3 < 0x20) | |
| 4699 return 0; | |
| 4700 /* charset exists */ | |
| 4701 /* | |
| 4702 NOTE: This takes advantage of the fact that | |
| 4703 FIELD2_TO_OFFICIAL_LEADING_BYTE and | |
| 4704 FIELD2_TO_PRIVATE_LEADING_BYTE are the same. | |
| 4705 */ | |
| 826 | 4706 charset = charset_by_leading_byte (f2 + FIELD2_TO_OFFICIAL_LEADING_BYTE); |
| 771 | 4707 if (EQ (charset, Qnil)) |
| 4708 return 0; | |
| 4709 /* check range as per size (94 or 96) of charset */ | |
| 4710 return ((f3 > 0x20 && f3 < 0x7f) || XCHARSET_CHARS (charset) == 96); | |
| 4711 } | |
| 4712 else | |
| 4713 { | |
| 4714 /* dimension-2 char */ | |
| 4715 Lisp_Object charset; | |
| 4716 | |
| 4717 /* leading byte must be correct */ | |
| 867 | 4718 if (f1 < MIN_ICHAR_FIELD1_OFFICIAL || |
| 4719 (f1 > MAX_ICHAR_FIELD1_OFFICIAL && f1 < MIN_ICHAR_FIELD1_PRIVATE) || | |
| 4720 f1 > MAX_ICHAR_FIELD1_PRIVATE) | |
| 771 | 4721 return 0; |
| 4722 /* octets not out of range */ | |
| 4723 if (f2 < 0x20 || f3 < 0x20) | |
| 4724 return 0; | |
| 4725 | |
| 4726 #ifdef ENABLE_COMPOSITE_CHARS | |
| 4727 if (f1 + FIELD1_TO_OFFICIAL_LEADING_BYTE == LEADING_BYTE_COMPOSITE) | |
| 4728 { | |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4729 if (UNBOUNDP (Fgethash (make_fixnum (ch), |
| 771 | 4730 Vcomposite_char_char2string_hash_table, |
| 4731 Qunbound))) | |
| 4732 return 0; | |
| 4733 return 1; | |
| 4734 } | |
| 4735 #endif /* ENABLE_COMPOSITE_CHARS */ | |
| 4736 | |
| 4737 /* charset exists */ | |
| 867 | 4738 if (f1 <= MAX_ICHAR_FIELD1_OFFICIAL) |
| 771 | 4739 charset = |
| 826 | 4740 charset_by_leading_byte (f1 + FIELD1_TO_OFFICIAL_LEADING_BYTE); |
| 771 | 4741 else |
| 4742 charset = | |
| 826 | 4743 charset_by_leading_byte (f1 + FIELD1_TO_PRIVATE_LEADING_BYTE); |
| 771 | 4744 |
| 4745 if (EQ (charset, Qnil)) | |
| 4746 return 0; | |
| 4747 /* check range as per size (94x94 or 96x96) of charset */ | |
| 4748 return ((f2 != 0x20 && f2 != 0x7F && f3 != 0x20 && f3 != 0x7F) || | |
| 4749 XCHARSET_CHARS (charset) == 96); | |
| 4750 } | |
| 4751 } | |
| 4752 | |
| 4753 /* Copy the character pointed to by SRC into DST. Do not call this | |
| 867 | 4754 directly. Use the macro itext_copy_ichar() instead. |
| 771 | 4755 Return the number of bytes copied. */ |
| 4756 | |
| 4757 Bytecount | |
| 867 | 4758 non_ascii_itext_copy_ichar (const Ibyte *src, Ibyte *dst) |
| 771 | 4759 { |
| 826 | 4760 Bytecount bytes = rep_bytes_by_first_byte (*src); |
| 771 | 4761 Bytecount i; |
| 4762 for (i = bytes; i; i--, dst++, src++) | |
| 4763 *dst = *src; | |
| 4764 return bytes; | |
| 4765 } | |
| 4766 | |
| 4767 #endif /* MULE */ | |
| 4768 | |
| 4769 | |
| 4770 /************************************************************************/ | |
| 867 | 4771 /* streams of Ichars */ |
| 771 | 4772 /************************************************************************/ |
| 4773 | |
| 4774 #ifdef MULE | |
| 4775 | |
| 867 | 4776 /* Treat a stream as a stream of Ichar's rather than a stream of bytes. |
| 771 | 4777 The functions below are not meant to be called directly; use |
| 4778 the macros in insdel.h. */ | |
| 4779 | |
| 867 | 4780 Ichar |
| 4781 Lstream_get_ichar_1 (Lstream *stream, int ch) | |
| 771 | 4782 { |
| 867 | 4783 Ibyte str[MAX_ICHAR_LEN]; |
| 4784 Ibyte *strptr = str; | |
| 771 | 4785 Bytecount bytes; |
| 4786 | |
| 867 | 4787 str[0] = (Ibyte) ch; |
| 771 | 4788 |
| 826 | 4789 for (bytes = rep_bytes_by_first_byte (ch) - 1; bytes; bytes--) |
| 771 | 4790 { |
| 4791 int c = Lstream_getc (stream); | |
| 800 | 4792 text_checking_assert (c >= 0); |
| 867 | 4793 *++strptr = (Ibyte) c; |
| 771 | 4794 } |
| 867 | 4795 return itext_ichar (str); |
| 771 | 4796 } |
| 4797 | |
| 4798 int | |
| 867 | 4799 Lstream_fput_ichar (Lstream *stream, Ichar ch) |
| 771 | 4800 { |
| 867 | 4801 Ibyte str[MAX_ICHAR_LEN]; |
| 4802 Bytecount len = set_itext_ichar (str, ch); | |
| 771 | 4803 return Lstream_write (stream, str, len); |
| 4804 } | |
| 4805 | |
| 4806 void | |
| 867 | 4807 Lstream_funget_ichar (Lstream *stream, Ichar ch) |
| 771 | 4808 { |
| 867 | 4809 Ibyte str[MAX_ICHAR_LEN]; |
| 4810 Bytecount len = set_itext_ichar (str, ch); | |
| 771 | 4811 Lstream_unread (stream, str, len); |
| 4812 } | |
| 4813 | |
| 4814 #endif /* MULE */ | |
| 4815 | |
| 4816 | |
| 4817 /************************************************************************/ | |
| 4818 /* Lisp primitives for working with characters */ | |
| 4819 /************************************************************************/ | |
| 4820 | |
| 4821 DEFUN ("make-char", Fmake_char, 2, 3, 0, /* | |
| 4822 Make a character from CHARSET and octets ARG1 and ARG2. | |
| 4823 ARG2 is required only for characters from two-dimensional charsets. | |
| 4824 | |
| 4825 Each octet should be in the range 32 through 127 for a 96 or 96x96 | |
| 4826 charset and 33 through 126 for a 94 or 94x94 charset. (Most charsets | |
| 4827 are either 96 or 94x94.) Note that this is 32 more than the values | |
| 4828 typically given for 94x94 charsets. When two octets are required, the | |
| 4829 order is "standard" -- the same as appears in ISO-2022 encodings, | |
| 4830 reference tables, etc. | |
| 4831 | |
| 4832 \(Note the following non-obvious result: Computerized translation | |
| 4833 tables often encode the two octets as the high and low bytes, | |
| 4834 respectively, of a hex short, while when there's only one octet, it | |
| 4835 goes in the low byte. When decoding such a value, you need to treat | |
| 4836 the two cases differently when calling make-char: One is (make-char | |
| 4837 CHARSET HIGH LOW), the other is (make-char CHARSET LOW).) | |
| 4838 | |
| 4839 For example, (make-char 'latin-iso8859-2 185) or (make-char | |
| 4840 'latin-iso8859-2 57) will return the Latin 2 character s with caron. | |
| 4841 | |
| 4842 As another example, the Japanese character for "kawa" (stream), which | |
| 4843 looks something like this: | |
| 4844 | |
| 4845 | | | |
| 4846 | | | | |
| 4847 | | | | |
| 4848 | | | | |
| 4849 / | | |
| 4850 | |
| 4851 appears in the Unicode Standard (version 2.0) on page 7-287 with the | |
| 4852 following values (see also page 7-4): | |
| 4853 | |
| 4854 U 5DDD (Unicode) | |
| 4855 G 0-2008 (GB 2312-80) | |
| 4856 J 0-3278 (JIS X 0208-1990) | |
| 4857 K 0-8425 (KS C 5601-1987) | |
| 4858 B A474 (Big Five) | |
| 4859 C 1-4455 (CNS 11643-1986 (1st plane)) | |
| 4860 A 213C34 (ANSI Z39.64-1989) | |
| 4861 | |
| 4862 These are equivalent to: | |
| 4863 | |
| 4864 \(make-char 'chinese-gb2312 52 40) | |
| 4865 \(make-char 'japanese-jisx0208 64 110) | |
| 4866 \(make-char 'korean-ksc5601 116 57) | |
| 4867 \(make-char 'chinese-cns11643-1 76 87) | |
| 4868 \(decode-big5-char '(164 . 116)) | |
| 4869 | |
| 4870 \(All codes above are two decimal numbers except for Big Five and ANSI | |
| 4871 Z39.64, which we don't support. We add 32 to each of the decimal | |
| 4872 numbers. Big Five is split in a rather hackish fashion into two | |
| 4873 charsets, `big5-1' and `big5-2', due to its excessive size -- 94x157, | |
| 4874 with the first codepoint in the range 0xA1 to 0xFE and the second in | |
| 4875 the range 0x40 to 0x7E or 0xA1 to 0xFE. `decode-big5-char' is used to | |
| 4876 generate the char from its codes, and `encode-big5-char' extracts the | |
| 4877 codes.) | |
| 4878 | |
| 4879 When compiled without MULE, this function does not do much, but it's | |
| 4880 provided for compatibility. In this case, the following CHARSET symbols | |
| 4881 are allowed: | |
| 4882 | |
| 4883 `ascii' -- ARG1 should be in the range 0 through 127. | |
| 4884 `control-1' -- ARG1 should be in the range 128 through 159. | |
| 4885 else -- ARG1 is coerced to be between 0 and 255, and then the high | |
| 4886 bit is set. | |
| 4887 | |
| 4888 `int-to-char of the resulting ARG1' is returned, and ARG2 is always ignored. | |
| 4889 */ | |
| 2333 | 4890 (charset, arg1, USED_IF_MULE (arg2))) |
| 771 | 4891 { |
| 4892 #ifdef MULE | |
| 4893 Lisp_Charset *cs; | |
| 4894 int a1, a2; | |
| 4895 int lowlim, highlim; | |
| 4896 | |
| 4897 charset = Fget_charset (charset); | |
| 4898 cs = XCHARSET (charset); | |
| 4899 | |
| 788 | 4900 get_charset_limits (charset, &lowlim, &highlim); |
| 771 | 4901 |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4902 CHECK_FIXNUM (arg1); |
| 771 | 4903 /* It is useful (and safe, according to Olivier Galibert) to strip |
| 4904 the 8th bit off ARG1 and ARG2 because it allows programmers to | |
| 4905 write (make-char 'latin-iso8859-2 CODE) where code is the actual | |
| 4906 Latin 2 code of the character. */ | |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4907 a1 = XFIXNUM (arg1) & 0x7f; |
| 771 | 4908 if (a1 < lowlim || a1 > highlim) |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4909 args_out_of_range_3 (arg1, make_fixnum (lowlim), make_fixnum (highlim)); |
| 771 | 4910 |
| 4911 if (CHARSET_DIMENSION (cs) == 1) | |
| 4912 { | |
| 4913 if (!NILP (arg2)) | |
| 4914 invalid_argument | |
| 4915 ("Charset is of dimension one; second octet must be nil", arg2); | |
| 867 | 4916 return make_char (make_ichar (charset, a1, 0)); |
| 771 | 4917 } |
| 4918 | |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4919 CHECK_FIXNUM (arg2); |
|
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4920 a2 = XFIXNUM (arg2) & 0x7f; |
| 771 | 4921 if (a2 < lowlim || a2 > highlim) |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4922 args_out_of_range_3 (arg2, make_fixnum (lowlim), make_fixnum (highlim)); |
| 771 | 4923 |
| 867 | 4924 return make_char (make_ichar (charset, a1, a2)); |
| 771 | 4925 #else |
| 4926 int a1; | |
| 4927 int lowlim, highlim; | |
| 4928 | |
| 4929 if (EQ (charset, Qascii)) lowlim = 0, highlim = 127; | |
| 4930 else if (EQ (charset, Qcontrol_1)) lowlim = 0, highlim = 31; | |
| 4931 else lowlim = 0, highlim = 127; | |
| 4932 | |
|
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5474
diff
changeset
|
4933 CHECK_FIXNUM (arg1); |
| 771 | 4934 /* It is useful (and safe, according to Olivier Galibert) to strip |
| 4935 the 8th bit off ARG1 and ARG2 because it allows programmers to | |
| 4936 write (make-char 'latin-iso8859-2 CODE) where code is the actual | |
| 4937 Latin 2 code of the character. */ | |
|
5581
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4938 a1 = XFIXNUM (arg1) & 0x7f; |
| 771 | 4939 if (a1 < lowlim || a1 > highlim) |
|
5581
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Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4940 args_out_of_range_3 (arg1, make_fixnum (lowlim), make_fixnum (highlim)); |
| 771 | 4941 |
| 4942 if (EQ (charset, Qascii)) | |
| 4943 return make_char (a1); | |
| 4944 return make_char (a1 + 128); | |
| 4945 #endif /* MULE */ | |
| 4946 } | |
| 4947 | |
| 4948 #ifdef MULE | |
| 4949 | |
| 4950 DEFUN ("char-charset", Fchar_charset, 1, 1, 0, /* | |
| 4951 Return the character set of char CH. | |
| 4952 */ | |
| 4953 (ch)) | |
| 4954 { | |
| 4955 CHECK_CHAR_COERCE_INT (ch); | |
| 4956 | |
| 826 | 4957 return XCHARSET_NAME (charset_by_leading_byte |
| 867 | 4958 (ichar_leading_byte (XCHAR (ch)))); |
| 771 | 4959 } |
| 4960 | |
| 4961 DEFUN ("char-octet", Fchar_octet, 1, 2, 0, /* | |
| 4962 Return the octet numbered N (should be 0 or 1) of char CH. | |
| 4963 N defaults to 0 if omitted. | |
| 4964 */ | |
| 4965 (ch, n)) | |
| 4966 { | |
| 4967 Lisp_Object charset; | |
| 4968 int octet0, octet1; | |
| 4969 | |
| 4970 CHECK_CHAR_COERCE_INT (ch); | |
| 4971 | |
| 867 | 4972 BREAKUP_ICHAR (XCHAR (ch), charset, octet0, octet1); |
| 771 | 4973 |
| 4974 if (NILP (n) || EQ (n, Qzero)) | |
|
5581
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4975 return make_fixnum (octet0); |
|
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4976 else if (EQ (n, make_fixnum (1))) |
|
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
4977 return make_fixnum (octet1); |
| 771 | 4978 else |
| 4979 invalid_constant ("Octet number must be 0 or 1", n); | |
| 4980 } | |
| 4981 | |
| 3724 | 4982 #endif /* MULE */ |
| 4983 | |
| 771 | 4984 DEFUN ("split-char", Fsplit_char, 1, 1, 0, /* |
| 4985 Return list of charset and one or two position-codes of CHAR. | |
| 4986 */ | |
| 4987 (character)) | |
| 4988 { | |
| 4989 /* This function can GC */ | |
| 4990 struct gcpro gcpro1, gcpro2; | |
| 4991 Lisp_Object charset = Qnil; | |
| 4992 Lisp_Object rc = Qnil; | |
| 4993 int c1, c2; | |
| 4994 | |
| 4995 GCPRO2 (charset, rc); | |
| 4996 CHECK_CHAR_COERCE_INT (character); | |
| 4997 | |
| 867 | 4998 BREAKUP_ICHAR (XCHAR (character), charset, c1, c2); |
| 771 | 4999 |
| 3724 | 5000 if (XCHARSET_DIMENSION (charset) == 2) |
| 771 | 5001 { |
|
5581
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parents:
5474
diff
changeset
|
5002 rc = list3 (XCHARSET_NAME (charset), make_fixnum (c1), make_fixnum (c2)); |
| 771 | 5003 } |
| 5004 else | |
| 5005 { | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
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|
5006 rc = list2 (XCHARSET_NAME (charset), make_fixnum (c1)); |
| 771 | 5007 } |
| 5008 UNGCPRO; | |
| 5009 | |
| 5010 return rc; | |
| 5011 } | |
| 5012 | |
| 5013 | |
| 5014 /************************************************************************/ | |
| 5015 /* composite character functions */ | |
| 5016 /************************************************************************/ | |
| 5017 | |
| 5018 #ifdef ENABLE_COMPOSITE_CHARS | |
| 5019 | |
| 867 | 5020 Ichar |
| 5021 lookup_composite_char (Ibyte *str, int len) | |
| 771 | 5022 { |
| 5023 Lisp_Object lispstr = make_string (str, len); | |
| 5024 Lisp_Object ch = Fgethash (lispstr, | |
| 5025 Vcomposite_char_string2char_hash_table, | |
| 5026 Qunbound); | |
| 867 | 5027 Ichar emch; |
| 771 | 5028 |
| 5029 if (UNBOUNDP (ch)) | |
| 5030 { | |
| 5031 if (composite_char_row_next >= 128) | |
| 5032 invalid_operation ("No more composite chars available", lispstr); | |
| 867 | 5033 emch = make_ichar (Vcharset_composite, composite_char_row_next, |
| 771 | 5034 composite_char_col_next); |
| 5035 Fputhash (make_char (emch), lispstr, | |
| 5036 Vcomposite_char_char2string_hash_table); | |
| 5037 Fputhash (lispstr, make_char (emch), | |
| 5038 Vcomposite_char_string2char_hash_table); | |
| 5039 composite_char_col_next++; | |
| 5040 if (composite_char_col_next >= 128) | |
| 5041 { | |
| 5042 composite_char_col_next = 32; | |
| 5043 composite_char_row_next++; | |
| 5044 } | |
| 5045 } | |
| 5046 else | |
| 5047 emch = XCHAR (ch); | |
| 5048 return emch; | |
| 5049 } | |
| 5050 | |
| 5051 Lisp_Object | |
| 867 | 5052 composite_char_string (Ichar ch) |
| 771 | 5053 { |
| 5054 Lisp_Object str = Fgethash (make_char (ch), | |
| 5055 Vcomposite_char_char2string_hash_table, | |
| 5056 Qunbound); | |
| 5057 assert (!UNBOUNDP (str)); | |
| 5058 return str; | |
| 5059 } | |
| 5060 | |
| 826 | 5061 DEFUN ("make-composite-char", Fmake_composite_char, 1, 1, 0, /* |
| 771 | 5062 Convert a string into a single composite character. |
| 5063 The character is the result of overstriking all the characters in | |
| 5064 the string. | |
| 5065 */ | |
| 5066 (string)) | |
| 5067 { | |
| 5068 CHECK_STRING (string); | |
| 5069 return make_char (lookup_composite_char (XSTRING_DATA (string), | |
| 5070 XSTRING_LENGTH (string))); | |
| 5071 } | |
| 5072 | |
| 826 | 5073 DEFUN ("composite-char-string", Fcomposite_char_string, 1, 1, 0, /* |
| 771 | 5074 Return a string of the characters comprising a composite character. |
| 5075 */ | |
| 5076 (ch)) | |
| 5077 { | |
| 867 | 5078 Ichar emch; |
| 771 | 5079 |
| 5080 CHECK_CHAR (ch); | |
| 5081 emch = XCHAR (ch); | |
| 867 | 5082 if (ichar_leading_byte (emch) != LEADING_BYTE_COMPOSITE) |
| 771 | 5083 invalid_argument ("Must be composite char", ch); |
| 5084 return composite_char_string (emch); | |
| 5085 } | |
| 5086 #endif /* ENABLE_COMPOSITE_CHARS */ | |
| 5087 | |
| 5088 | |
| 5089 /************************************************************************/ | |
| 5090 /* initialization */ | |
| 5091 /************************************************************************/ | |
| 5092 | |
| 5093 void | |
| 1204 | 5094 reinit_eistring_early (void) |
| 771 | 5095 { |
| 5096 the_eistring_malloc_zero_init = the_eistring_zero_init; | |
| 5097 the_eistring_malloc_zero_init.mallocp_ = 1; | |
| 5098 } | |
| 5099 | |
| 5100 void | |
| 814 | 5101 init_eistring_once_early (void) |
| 5102 { | |
| 1204 | 5103 reinit_eistring_early (); |
| 814 | 5104 } |
| 5105 | |
| 5106 void | |
| 771 | 5107 syms_of_text (void) |
| 5108 { | |
| 5109 DEFSUBR (Fmake_char); | |
| 3724 | 5110 DEFSUBR (Fsplit_char); |
| 771 | 5111 |
| 5112 #ifdef MULE | |
| 5113 DEFSUBR (Fchar_charset); | |
| 5114 DEFSUBR (Fchar_octet); | |
| 5115 | |
| 5116 #ifdef ENABLE_COMPOSITE_CHARS | |
| 5117 DEFSUBR (Fmake_composite_char); | |
| 5118 DEFSUBR (Fcomposite_char_string); | |
| 5119 #endif | |
| 5120 #endif /* MULE */ | |
| 5121 } | |
| 5122 | |
| 5123 void | |
| 5124 reinit_vars_of_text (void) | |
| 5125 { | |
| 5126 int i; | |
| 5127 | |
| 867 | 5128 conversion_in_dynarr_list = Dynarr_new2 (Ibyte_dynarr_dynarr, |
| 5129 Ibyte_dynarr *); | |
| 771 | 5130 conversion_out_dynarr_list = Dynarr_new2 (Extbyte_dynarr_dynarr, |
| 5131 Extbyte_dynarr *); | |
| 5132 | |
| 5133 for (i = 0; i <= MAX_BYTEBPOS_GAP_SIZE_3; i++) | |
| 5134 three_to_one_table[i] = i / 3; | |
| 5135 } | |
| 5136 | |
| 5137 void | |
| 5138 vars_of_text (void) | |
| 5139 { | |
|
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parents:
4526
diff
changeset
|
5140 QSin_char_byte_conversion = build_defer_string ("(in char-byte conversion)"); |
| 1292 | 5141 staticpro (&QSin_char_byte_conversion); |
| 5142 QSin_internal_external_conversion = | |
|
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parents:
4526
diff
changeset
|
5143 build_defer_string ("(in internal-external conversion)"); |
| 1292 | 5144 staticpro (&QSin_internal_external_conversion); |
| 5145 | |
| 771 | 5146 #ifdef ENABLE_COMPOSITE_CHARS |
| 5147 /* #### not dumped properly */ | |
| 5148 composite_char_row_next = 32; | |
| 5149 composite_char_col_next = 32; | |
| 5150 | |
| 5151 Vcomposite_char_string2char_hash_table = | |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5013
diff
changeset
|
5152 make_lisp_hash_table (500, HASH_TABLE_NON_WEAK, Qequal); |
| 771 | 5153 Vcomposite_char_char2string_hash_table = |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5013
diff
changeset
|
5154 make_lisp_hash_table (500, HASH_TABLE_NON_WEAK, Qeq); |
| 771 | 5155 staticpro (&Vcomposite_char_string2char_hash_table); |
| 5156 staticpro (&Vcomposite_char_char2string_hash_table); | |
| 5157 #endif /* ENABLE_COMPOSITE_CHARS */ | |
| 5158 } |