428
+ − 1 /* Output like sprintf to a buffer of specified size.
+ − 2 Also takes args differently: pass one pointer to an array of strings
+ − 3 in addition to the format string which is separate.
+ − 4 Copyright (C) 1995 Free Software Foundation, Inc.
771
+ − 5 Copyright (C) 2001 Ben Wing.
428
+ − 6 Rewritten by mly to use varargs.h.
+ − 7 Rewritten from scratch by Ben Wing (February 1995) for Mule; expanded
+ − 8 to full printf spec.
+ − 9
+ − 10 This file is part of XEmacs.
+ − 11
+ − 12 XEmacs is free software; you can redistribute it and/or modify it
+ − 13 under the terms of the GNU General Public License as published by the
+ − 14 Free Software Foundation; either version 2, or (at your option) any
+ − 15 later version.
+ − 16
+ − 17 XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ − 18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ − 19 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ − 20 for more details.
+ − 21
+ − 22 You should have received a copy of the GNU General Public License
+ − 23 along with XEmacs; see the file COPYING. If not, write to
+ − 24 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ − 25 Boston, MA 02111-1307, USA. */
+ − 26
+ − 27 /* Synched up with: Rewritten. Not in FSF. */
+ − 28
+ − 29 #include <config.h>
+ − 30 #include "lisp.h"
+ − 31
+ − 32 #include "buffer.h"
+ − 33 #include "lstream.h"
+ − 34
446
+ − 35 static const char * const valid_flags = "-+ #0";
+ − 36 static const char * const valid_converters = "dic" "ouxX" "feEgG" "sS";
+ − 37 static const char * const int_converters = "dic";
+ − 38 static const char * const unsigned_int_converters = "ouxX";
+ − 39 static const char * const double_converters = "feEgG";
+ − 40 static const char * const string_converters = "sS";
428
+ − 41
+ − 42 typedef struct printf_spec printf_spec;
+ − 43 struct printf_spec
+ − 44 {
+ − 45 int argnum; /* which argument does this spec want? This is one-based:
+ − 46 The first argument given is numbered 1, the second
+ − 47 is 2, etc. This is to handle %##$x-type specs. */
+ − 48 int minwidth;
+ − 49 int precision;
+ − 50 unsigned int minus_flag:1;
+ − 51 unsigned int plus_flag:1;
+ − 52 unsigned int space_flag:1;
+ − 53 unsigned int number_flag:1;
+ − 54 unsigned int zero_flag:1;
+ − 55 unsigned int h_flag:1;
+ − 56 unsigned int l_flag:1;
+ − 57 unsigned int forwarding_precision:1;
+ − 58 char converter; /* converter character or 0 for dummy marker
+ − 59 indicating literal text at the end of the
+ − 60 specification */
+ − 61 Bytecount text_before; /* position of the first character of the
+ − 62 block of literal text before this spec */
+ − 63 Bytecount text_before_len; /* length of that text */
+ − 64 };
+ − 65
+ − 66 typedef union printf_arg printf_arg;
+ − 67 union printf_arg
+ − 68 {
+ − 69 long l;
+ − 70 unsigned long ul;
+ − 71 double d;
665
+ − 72 Intbyte *bp;
428
+ − 73 };
+ − 74
+ − 75 /* We maintain a list of all the % specs in the specification,
+ − 76 along with the offset and length of the block of literal text
+ − 77 before each spec. In addition, we have a "dummy" spec that
+ − 78 represents all the literal text at the end of the specification.
+ − 79 Its converter is 0. */
+ − 80
+ − 81 typedef struct
+ − 82 {
+ − 83 Dynarr_declare (struct printf_spec);
+ − 84 } printf_spec_dynarr;
+ − 85
+ − 86 typedef struct
+ − 87 {
+ − 88 Dynarr_declare (union printf_arg);
+ − 89 } printf_arg_dynarr;
+ − 90
448
+ − 91 /* Append STRING (of length LEN bytes) to STREAM.
+ − 92 MINLEN is the minimum field width.
+ − 93 If MINUS_FLAG is set, left-justify the string in its field;
+ − 94 otherwise, right-justify.
+ − 95 If ZERO_FLAG is set, pad with 0's; otherwise pad with spaces.
+ − 96 If MAXLEN is non-negative, the string is first truncated on the
+ − 97 right to that many characters.
428
+ − 98
+ − 99 Note that MINLEN and MAXLEN are Charcounts but LEN is a Bytecount. */
+ − 100
+ − 101 static void
771
+ − 102 doprnt_2 (Lisp_Object stream, const Intbyte *string, Bytecount len,
428
+ − 103 Charcount minlen, Charcount maxlen, int minus_flag, int zero_flag)
+ − 104 {
+ − 105 Lstream *lstr = XLSTREAM (stream);
448
+ − 106 Charcount cclen = bytecount_to_charcount (string, len);
+ − 107 int to_add = minlen - cclen;
428
+ − 108
+ − 109 /* Padding at beginning to right-justify ... */
448
+ − 110 if (!minus_flag)
+ − 111 while (to_add-- > 0)
+ − 112 Lstream_putc (lstr, zero_flag ? '0' : ' ');
428
+ − 113
448
+ − 114 if (0 <= maxlen && maxlen < cclen)
+ − 115 len = charcount_to_bytecount (string, maxlen);
428
+ − 116 Lstream_write (lstr, string, len);
+ − 117
+ − 118 /* Padding at end to left-justify ... */
448
+ − 119 if (minus_flag)
+ − 120 while (to_add-- > 0)
+ − 121 Lstream_putc (lstr, zero_flag ? '0' : ' ');
428
+ − 122 }
+ − 123
665
+ − 124 static const Intbyte *
+ − 125 parse_off_posnum (const Intbyte *start, const Intbyte *end, int *returned_num)
428
+ − 126 {
665
+ − 127 Intbyte arg_convert[100];
+ − 128 REGISTER Intbyte *arg_ptr = arg_convert;
428
+ − 129
+ − 130 *returned_num = -1;
+ − 131 while (start != end && isdigit (*start))
+ − 132 {
647
+ − 133 if (arg_ptr - arg_convert >= (int) sizeof (arg_convert) - 1)
+ − 134 syntax_error ("Format converter number too large", Qunbound);
428
+ − 135 *arg_ptr++ = *start++;
+ − 136 }
+ − 137 *arg_ptr = '\0';
+ − 138 if (arg_convert != arg_ptr)
+ − 139 *returned_num = atoi ((char *) arg_convert);
+ − 140 return start;
+ − 141 }
+ − 142
+ − 143 #define NEXT_ASCII_BYTE(ch) \
+ − 144 do { \
+ − 145 if (fmt == fmt_end) \
563
+ − 146 syntax_error ("Premature end of format string", Qunbound); \
428
+ − 147 ch = *fmt; \
+ − 148 if (ch >= 0200) \
563
+ − 149 syntax_error ("Non-ASCII character in format converter spec", Qunbound); \
428
+ − 150 fmt++; \
+ − 151 } while (0)
+ − 152
+ − 153 #define RESOLVE_FLAG_CONFLICTS(spec) \
+ − 154 do { \
+ − 155 if (spec.space_flag && spec.plus_flag) \
+ − 156 spec.space_flag = 0; \
+ − 157 if (spec.zero_flag && spec.space_flag) \
+ − 158 spec.zero_flag = 0; \
+ − 159 } while (0)
+ − 160
+ − 161 static printf_spec_dynarr *
665
+ − 162 parse_doprnt_spec (const Intbyte *format, Bytecount format_length)
428
+ − 163 {
665
+ − 164 const Intbyte *fmt = format;
+ − 165 const Intbyte *fmt_end = format + format_length;
428
+ − 166 printf_spec_dynarr *specs = Dynarr_new (printf_spec);
+ − 167 int prev_argnum = 0;
+ − 168
+ − 169 while (1)
+ − 170 {
+ − 171 struct printf_spec spec;
665
+ − 172 const Intbyte *text_end;
+ − 173 Intbyte ch;
428
+ − 174
+ − 175 xzero (spec);
+ − 176 if (fmt == fmt_end)
+ − 177 return specs;
665
+ − 178 text_end = (Intbyte *) memchr (fmt, '%', fmt_end - fmt);
428
+ − 179 if (!text_end)
+ − 180 text_end = fmt_end;
+ − 181 spec.text_before = fmt - format;
+ − 182 spec.text_before_len = text_end - fmt;
+ − 183 fmt = text_end;
+ − 184 if (fmt != fmt_end)
+ − 185 {
+ − 186 fmt++; /* skip over % */
+ − 187
+ − 188 /* A % is special -- no arg number. According to ANSI specs,
+ − 189 field width does not apply to %% conversion. */
+ − 190 if (fmt != fmt_end && *fmt == '%')
+ − 191 {
+ − 192 spec.converter = '%';
+ − 193 Dynarr_add (specs, spec);
+ − 194 fmt++;
+ − 195 continue;
+ − 196 }
+ − 197
+ − 198 /* Is there a field number specifier? */
+ − 199 {
665
+ − 200 const Intbyte *ptr;
428
+ − 201 int fieldspec;
+ − 202
+ − 203 ptr = parse_off_posnum (fmt, fmt_end, &fieldspec);
+ − 204 if (fieldspec > 0 && ptr != fmt_end && *ptr == '$')
+ − 205 {
+ − 206 /* There is a format specifier */
+ − 207 prev_argnum = fieldspec;
+ − 208 fmt = ptr + 1;
+ − 209 }
+ − 210 else
+ − 211 prev_argnum++;
+ − 212 spec.argnum = prev_argnum;
+ − 213 }
+ − 214
+ − 215 /* Parse off any flags */
+ − 216 NEXT_ASCII_BYTE (ch);
+ − 217 while (strchr (valid_flags, ch))
+ − 218 {
+ − 219 switch (ch)
+ − 220 {
446
+ − 221 case '-': spec.minus_flag = 1; break;
+ − 222 case '+': spec.plus_flag = 1; break;
+ − 223 case ' ': spec.space_flag = 1; break;
428
+ − 224 case '#': spec.number_flag = 1; break;
446
+ − 225 case '0': spec.zero_flag = 1; break;
428
+ − 226 default: abort ();
+ − 227 }
+ − 228 NEXT_ASCII_BYTE (ch);
+ − 229 }
+ − 230
+ − 231 /* Parse off the minimum field width */
+ − 232 fmt--; /* back up */
+ − 233
+ − 234 /*
+ − 235 * * means the field width was passed as an argument.
+ − 236 * Mark the current spec as one that forwards its
+ − 237 * field width and flags to the next spec in the array.
+ − 238 * Then create a new spec and continue with the parsing.
+ − 239 */
+ − 240 if (fmt != fmt_end && *fmt == '*')
+ − 241 {
+ − 242 spec.converter = '*';
+ − 243 RESOLVE_FLAG_CONFLICTS(spec);
+ − 244 Dynarr_add (specs, spec);
+ − 245 xzero (spec);
+ − 246 spec.argnum = ++prev_argnum;
+ − 247 fmt++;
+ − 248 }
+ − 249 else
+ − 250 {
+ − 251 fmt = parse_off_posnum (fmt, fmt_end, &spec.minwidth);
+ − 252 if (spec.minwidth == -1)
+ − 253 spec.minwidth = 0;
+ − 254 }
+ − 255
+ − 256 /* Parse off any precision specified */
+ − 257 NEXT_ASCII_BYTE (ch);
+ − 258 if (ch == '.')
+ − 259 {
+ − 260 /*
+ − 261 * * means the precision was passed as an argument.
+ − 262 * Mark the current spec as one that forwards its
+ − 263 * fieldwidth, flags and precision to the next spec in
+ − 264 * the array. Then create a new spec and continue
+ − 265 * with the parse.
+ − 266 */
+ − 267 if (fmt != fmt_end && *fmt == '*')
+ − 268 {
+ − 269 spec.converter = '*';
+ − 270 spec.forwarding_precision = 1;
+ − 271 RESOLVE_FLAG_CONFLICTS(spec);
+ − 272 Dynarr_add (specs, spec);
+ − 273 xzero (spec);
+ − 274 spec.argnum = ++prev_argnum;
+ − 275 fmt++;
+ − 276 }
+ − 277 else
+ − 278 {
+ − 279 fmt = parse_off_posnum (fmt, fmt_end, &spec.precision);
+ − 280 if (spec.precision == -1)
+ − 281 spec.precision = 0;
+ − 282 }
+ − 283 NEXT_ASCII_BYTE (ch);
+ − 284 }
+ − 285 else
+ − 286 /* No precision specified */
+ − 287 spec.precision = -1;
+ − 288
+ − 289 /* Parse off h or l flag */
+ − 290 if (ch == 'h' || ch == 'l')
+ − 291 {
+ − 292 if (ch == 'h')
+ − 293 spec.h_flag = 1;
+ − 294 else
+ − 295 spec.l_flag = 1;
+ − 296 NEXT_ASCII_BYTE (ch);
+ − 297 }
+ − 298
+ − 299 if (!strchr (valid_converters, ch))
563
+ − 300 syntax_error ("Invalid converter character", make_char (ch));
428
+ − 301 spec.converter = ch;
+ − 302 }
+ − 303
+ − 304 RESOLVE_FLAG_CONFLICTS(spec);
+ − 305 Dynarr_add (specs, spec);
+ − 306 }
+ − 307
+ − 308 RETURN_NOT_REACHED(specs) /* suppress compiler warning */
+ − 309 }
+ − 310
+ − 311 static int
+ − 312 get_args_needed (printf_spec_dynarr *specs)
+ − 313 {
+ − 314 int args_needed = 0;
+ − 315 REGISTER int i;
+ − 316
+ − 317 /* Figure out how many args are needed. This may be less than
+ − 318 the number of specs because a spec could be %% or could be
+ − 319 missing (literal text at end of format string) or there
+ − 320 could be specs where the field number is explicitly given.
+ − 321 We just look for the maximum argument number that's referenced. */
+ − 322
+ − 323 for (i = 0; i < Dynarr_length (specs); i++)
+ − 324 {
+ − 325 char ch = Dynarr_at (specs, i).converter;
+ − 326 if (ch && ch != '%')
+ − 327 {
+ − 328 int argnum = Dynarr_at (specs, i).argnum;
+ − 329 if (argnum > args_needed)
+ − 330 args_needed = argnum;
+ − 331 }
+ − 332 }
+ − 333
+ − 334 return args_needed;
+ − 335 }
+ − 336
+ − 337 static printf_arg_dynarr *
+ − 338 get_doprnt_args (printf_spec_dynarr *specs, va_list vargs)
+ − 339 {
+ − 340 printf_arg_dynarr *args = Dynarr_new (printf_arg);
+ − 341 union printf_arg arg;
+ − 342 REGISTER int i;
+ − 343 int args_needed = get_args_needed (specs);
+ − 344
+ − 345 xzero (arg);
+ − 346 for (i = 1; i <= args_needed; i++)
+ − 347 {
+ − 348 int j;
+ − 349 char ch;
+ − 350 struct printf_spec *spec = 0;
+ − 351
+ − 352 for (j = 0; j < Dynarr_length (specs); j++)
+ − 353 {
+ − 354 spec = Dynarr_atp (specs, j);
+ − 355 if (spec->argnum == i)
+ − 356 break;
+ − 357 }
+ − 358
+ − 359 if (j == Dynarr_length (specs))
563
+ − 360 syntax_error ("No conversion spec for argument", make_int (i));
428
+ − 361
+ − 362 ch = spec->converter;
+ − 363
+ − 364 if (strchr (int_converters, ch))
+ − 365 {
446
+ − 366 if (spec->l_flag)
428
+ − 367 arg.l = va_arg (vargs, long);
+ − 368 else
446
+ − 369 /* int even if ch == 'c' or spec->h_flag:
+ − 370 "the type used in va_arg is supposed to match the
+ − 371 actual type **after default promotions**."
+ − 372 Hence we read an int, not a short, if spec->h_flag. */
+ − 373 arg.l = va_arg (vargs, int);
428
+ − 374 }
+ − 375 else if (strchr (unsigned_int_converters, ch))
+ − 376 {
446
+ − 377 if (spec->l_flag)
428
+ − 378 arg.ul = va_arg (vargs, unsigned long);
+ − 379 else
446
+ − 380 /* unsigned int even if ch == 'c' or spec->h_flag */
+ − 381 arg.ul = (unsigned long) va_arg (vargs, unsigned int);
428
+ − 382 }
+ − 383 else if (strchr (double_converters, ch))
+ − 384 arg.d = va_arg (vargs, double);
+ − 385 else if (strchr (string_converters, ch))
665
+ − 386 arg.bp = va_arg (vargs, Intbyte *);
428
+ − 387 else abort ();
+ − 388
+ − 389 Dynarr_add (args, arg);
+ − 390 }
+ − 391
+ − 392 return args;
+ − 393 }
+ − 394
771
+ − 395 /* Most basic entry point into string formatting.
+ − 396
+ − 397 Generate output from a format-spec (either a Lisp string
+ − 398 FORMAT_RELOC, or a C string FORMAT_NONRELOC of length FORMAT_LENGTH
+ − 399 -- which *MUST NOT* come from Lisp string data, unless GC is
+ − 400 inhibited). Output goes to STREAM. Returns the number of bytes
+ − 401 stored into STREAM. Arguments are either C-type arguments in
+ − 402 va_list VARGS, or an array of Lisp objects in LARGS of size
+ − 403 NARGS. (Behavior is different in the two cases -- you either get
+ − 404 standard sprintf() behavior or `format' behavior.) */
428
+ − 405
+ − 406 static Bytecount
665
+ − 407 emacs_doprnt_1 (Lisp_Object stream, const Intbyte *format_nonreloc,
771
+ − 408 Bytecount format_length, Lisp_Object format_reloc,
+ − 409 int nargs, const Lisp_Object *largs, va_list vargs)
428
+ − 410 {
+ − 411 printf_spec_dynarr *specs = 0;
+ − 412 printf_arg_dynarr *args = 0;
+ − 413 REGISTER int i;
+ − 414 int init_byte_count = Lstream_byte_count (XLSTREAM (stream));
771
+ − 415 int count;
428
+ − 416
+ − 417 if (!NILP (format_reloc))
+ − 418 {
+ − 419 format_nonreloc = XSTRING_DATA (format_reloc);
+ − 420 format_length = XSTRING_LENGTH (format_reloc);
+ − 421 }
+ − 422 if (format_length < 0)
442
+ − 423 format_length = (Bytecount) strlen ((const char *) format_nonreloc);
428
+ − 424
+ − 425 specs = parse_doprnt_spec (format_nonreloc, format_length);
771
+ − 426 count = record_unwind_protect_freeing_dynarr (specs);
+ − 427
428
+ − 428 if (largs)
+ − 429 {
446
+ − 430 /* allow too many args for string, but not too few */
428
+ − 431 if (nargs < get_args_needed (specs))
563
+ − 432 signal_error_1 (Qwrong_number_of_arguments,
428
+ − 433 list3 (Qformat,
+ − 434 make_int (nargs),
+ − 435 !NILP (format_reloc) ? format_reloc :
+ − 436 make_string (format_nonreloc, format_length)));
+ − 437 }
+ − 438 else
+ − 439 {
+ − 440 args = get_doprnt_args (specs, vargs);
771
+ − 441 record_unwind_protect_freeing_dynarr (args);
428
+ − 442 }
+ − 443
+ − 444 for (i = 0; i < Dynarr_length (specs); i++)
+ − 445 {
+ − 446 struct printf_spec *spec = Dynarr_atp (specs, i);
+ − 447 char ch;
+ − 448
+ − 449 /* Copy the text before */
+ − 450 if (!NILP (format_reloc)) /* refetch in case of GC below */
+ − 451 format_nonreloc = XSTRING_DATA (format_reloc);
446
+ − 452
771
+ − 453 doprnt_2 (stream, format_nonreloc + spec->text_before,
446
+ − 454 spec->text_before_len, 0, -1, 0, 0);
428
+ − 455
+ − 456 ch = spec->converter;
+ − 457
+ − 458 if (!ch)
+ − 459 continue;
+ − 460
+ − 461 if (ch == '%')
+ − 462 {
771
+ − 463 doprnt_2 (stream, (Intbyte *) &ch, 1, 0, -1, 0, 0);
428
+ − 464 continue;
+ − 465 }
+ − 466
+ − 467 /* The char '*' as converter means the field width, precision
+ − 468 was specified as an argument. Extract the data and forward
+ − 469 it to the next spec, to which it will apply. */
+ − 470 if (ch == '*')
+ − 471 {
+ − 472 struct printf_spec *nextspec = Dynarr_atp (specs, i + 1);
+ − 473 Lisp_Object obj = largs[spec->argnum - 1];
+ − 474
+ − 475 if (INTP (obj))
+ − 476 {
+ − 477 if (spec->forwarding_precision)
+ − 478 {
+ − 479 nextspec->precision = XINT (obj);
+ − 480 nextspec->minwidth = spec->minwidth;
+ − 481 }
+ − 482 else
+ − 483 {
+ − 484 nextspec->minwidth = XINT (obj);
446
+ − 485 if (XINT (obj) < 0)
428
+ − 486 {
+ − 487 spec->minus_flag = 1;
+ − 488 nextspec->minwidth = - nextspec->minwidth;
+ − 489 }
+ − 490 }
446
+ − 491 nextspec->minus_flag = spec->minus_flag;
+ − 492 nextspec->plus_flag = spec->plus_flag;
+ − 493 nextspec->space_flag = spec->space_flag;
428
+ − 494 nextspec->number_flag = spec->number_flag;
446
+ − 495 nextspec->zero_flag = spec->zero_flag;
428
+ − 496 }
+ − 497 continue;
+ − 498 }
+ − 499
+ − 500 if (largs && (spec->argnum < 1 || spec->argnum > nargs))
771
+ − 501 syntax_error ("Invalid repositioning argument",
+ − 502 make_int (spec->argnum));
428
+ − 503
+ − 504 else if (ch == 'S' || ch == 's')
+ − 505 {
665
+ − 506 Intbyte *string;
428
+ − 507 Bytecount string_len;
+ − 508
+ − 509 if (!largs)
+ − 510 {
+ − 511 string = Dynarr_at (args, spec->argnum - 1).bp;
771
+ − 512 #if 0
+ − 513 /* [[ error() can be called with null string arguments.
428
+ − 514 E.g., in fileio.c, the return value of strerror()
+ − 515 is never checked. We'll print (null), like some
+ − 516 printf implementations do. Would it be better (and safe)
+ − 517 to signal an error instead? Or should we just use the
771
+ − 518 empty string? -dkindred@cs.cmu.edu 8/1997 ]]
+ − 519 Do not hide bugs. --ben
428
+ − 520 */
+ − 521 if (!string)
665
+ − 522 string = (Intbyte *) "(null)";
771
+ − 523 #else
+ − 524 assert (string);
+ − 525 #endif
428
+ − 526 string_len = strlen ((char *) string);
+ − 527 }
+ − 528 else
+ − 529 {
+ − 530 Lisp_Object obj = largs[spec->argnum - 1];
440
+ − 531 Lisp_String *ls;
428
+ − 532
+ − 533 if (ch == 'S')
+ − 534 {
+ − 535 /* For `S', prin1 the argument and then treat like
+ − 536 a string. */
+ − 537 ls = XSTRING (Fprin1_to_string (obj, Qnil));
+ − 538 }
+ − 539 else if (STRINGP (obj))
+ − 540 ls = XSTRING (obj);
+ − 541 else if (SYMBOLP (obj))
+ − 542 ls = XSYMBOL (obj)->name;
+ − 543 else
+ − 544 {
+ − 545 /* convert to string using princ. */
+ − 546 ls = XSTRING (Fprin1_to_string (obj, Qt));
+ − 547 }
+ − 548 string = string_data (ls);
+ − 549 string_len = string_length (ls);
+ − 550 }
+ − 551
771
+ − 552 doprnt_2 (stream, string, string_len, spec->minwidth,
428
+ − 553 spec->precision, spec->minus_flag, spec->zero_flag);
+ − 554 }
+ − 555
+ − 556 else
+ − 557 {
+ − 558 /* Must be a number. */
+ − 559 union printf_arg arg;
+ − 560
+ − 561 if (!largs)
+ − 562 {
+ − 563 arg = Dynarr_at (args, spec->argnum - 1);
+ − 564 }
+ − 565 else
+ − 566 {
+ − 567 Lisp_Object obj = largs[spec->argnum - 1];
+ − 568 if (CHARP (obj))
+ − 569 obj = make_int (XCHAR (obj));
+ − 570 if (!INT_OR_FLOATP (obj))
+ − 571 {
563
+ − 572 syntax_error ("format specifier %%%c doesn't match argument type",
568
+ − 573 make_char (ch));
428
+ − 574 }
+ − 575 else if (strchr (double_converters, ch))
+ − 576 arg.d = XFLOATINT (obj);
+ − 577 else
+ − 578 {
446
+ − 579 if (FLOATP (obj))
+ − 580 obj = Ftruncate (obj);
428
+ − 581
+ − 582 if (strchr (unsigned_int_converters, ch))
446
+ − 583 arg.ul = (unsigned long) XINT (obj);
428
+ − 584 else
446
+ − 585 arg.l = XINT (obj);
428
+ − 586 }
+ − 587 }
+ − 588
+ − 589
+ − 590 if (ch == 'c')
+ − 591 {
+ − 592 Emchar a;
+ − 593 Bytecount charlen;
665
+ − 594 Intbyte charbuf[MAX_EMCHAR_LEN];
428
+ − 595
446
+ − 596 a = (Emchar) arg.l;
428
+ − 597
+ − 598 if (!valid_char_p (a))
568
+ − 599 syntax_error ("invalid character value %d to %%c spec", make_char (a));
428
+ − 600
+ − 601 charlen = set_charptr_emchar (charbuf, a);
771
+ − 602 doprnt_2 (stream, charbuf, charlen, spec->minwidth,
428
+ − 603 -1, spec->minus_flag, spec->zero_flag);
+ − 604 }
+ − 605 else
+ − 606 {
448
+ − 607 /* ASCII Decimal representation uses 2.4 times as many
+ − 608 bits as machine binary. */
+ − 609 char *text_to_print =
+ − 610 alloca_array (char, 32 +
+ − 611 max (spec->minwidth,
647
+ − 612 (int) max (sizeof (double),
+ − 613 sizeof (long)) * 3 +
448
+ − 614 max (spec->precision, 0)));
428
+ − 615 char constructed_spec[100];
446
+ − 616 char *p = constructed_spec;
428
+ − 617
448
+ − 618 /* Mostly reconstruct the spec and use sprintf() to
428
+ − 619 format the string. */
+ − 620
446
+ − 621 *p++ = '%';
+ − 622 if (spec->plus_flag) *p++ = '+';
+ − 623 if (spec->space_flag) *p++ = ' ';
+ − 624 if (spec->number_flag) *p++ = '#';
448
+ − 625 if (spec->minus_flag) *p++ = '-';
+ − 626 if (spec->zero_flag) *p++ = '0';
446
+ − 627
448
+ − 628 if (spec->minwidth >= 0)
577
+ − 629 {
+ − 630 long_to_string (p, spec->minwidth);
+ − 631 p += strlen (p);
+ − 632 }
448
+ − 633 if (spec->precision >= 0)
428
+ − 634 {
446
+ − 635 *p++ = '.';
577
+ − 636 long_to_string (p, spec->precision);
+ − 637 p += strlen (p);
428
+ − 638 }
448
+ − 639
428
+ − 640 if (strchr (double_converters, ch))
442
+ − 641 {
446
+ − 642 *p++ = ch;
+ − 643 *p++ = '\0';
442
+ − 644 sprintf (text_to_print, constructed_spec, arg.d);
+ − 645 }
428
+ − 646 else
+ − 647 {
448
+ − 648 *p++ = 'l'; /* Always use longs with sprintf() */
+ − 649 *p++ = ch;
+ − 650 *p++ = '\0';
446
+ − 651
+ − 652 if (strchr (unsigned_int_converters, ch))
+ − 653 sprintf (text_to_print, constructed_spec, arg.ul);
+ − 654 else
428
+ − 655 sprintf (text_to_print, constructed_spec, arg.l);
+ − 656 }
+ − 657
771
+ − 658 doprnt_2 (stream, (Intbyte *) text_to_print,
448
+ − 659 strlen (text_to_print), 0, -1, 0, 0);
428
+ − 660 }
+ − 661 }
+ − 662 }
+ − 663
771
+ − 664 unbind_to (count);
428
+ − 665 return Lstream_byte_count (XLSTREAM (stream)) - init_byte_count;
+ − 666 }
+ − 667
771
+ − 668 /* Basic external entry point into string formatting. See
+ − 669 emacs_doprnt_1().
+ − 670 */
+ − 671
+ − 672 Bytecount
+ − 673 emacs_doprnt_va (Lisp_Object stream, const Intbyte *format_nonreloc,
+ − 674 Bytecount format_length, Lisp_Object format_reloc,
+ − 675 va_list vargs)
+ − 676 {
+ − 677 return emacs_doprnt_1 (stream, format_nonreloc, format_length,
+ − 678 format_reloc, 0, 0, vargs);
+ − 679 }
+ − 680
+ − 681 /* Basic external entry point into string formatting. See
+ − 682 emacs_doprnt_1().
+ − 683 */
+ − 684
+ − 685 Bytecount
+ − 686 emacs_doprnt (Lisp_Object stream, const Intbyte *format_nonreloc,
+ − 687 Bytecount format_length, Lisp_Object format_reloc,
+ − 688 int nargs, const Lisp_Object *largs, ...)
428
+ − 689 {
+ − 690 va_list vargs;
+ − 691 Bytecount val;
+ − 692 va_start (vargs, largs);
771
+ − 693 val = emacs_doprnt_1 (stream, format_nonreloc, format_length,
+ − 694 format_reloc, nargs, largs, vargs);
428
+ − 695 va_end (vargs);
+ − 696 return val;
+ − 697 }
+ − 698
771
+ − 699 /* Similar to `format' in that its arguments are Lisp objects rather than C
+ − 700 objects. (For the versions that take C objects, see the
+ − 701 emacs_[v]sprintf... functions below.) Accepts the format string as
+ − 702 either a C string (FORMAT_NONRELOC, which *MUST NOT* come from Lisp
+ − 703 string data, unless GC is inhibited) or a Lisp string (FORMAT_RELOC).
+ − 704 Return resulting formatted string as a Lisp string.
428
+ − 705
771
+ − 706 All arguments are GCPRO'd, including FORMAT_RELOC; this makes it OK to
+ − 707 pass newly created objects into this function (as often happens).
428
+ − 708
771
+ − 709 #### It shouldn't be necessary to specify the number of arguments.
+ − 710 This would require some rewriting of the doprnt() functions, though.
+ − 711 */
428
+ − 712
+ − 713 Lisp_Object
771
+ − 714 emacs_vsprintf_string_lisp (const CIntbyte *format_nonreloc,
+ − 715 Lisp_Object format_reloc, int nargs,
+ − 716 const Lisp_Object *largs)
428
+ − 717 {
771
+ − 718 Lisp_Object stream;
428
+ − 719 Lisp_Object obj;
771
+ − 720 struct gcpro gcpro1, gcpro2;
+ − 721 GCPRO2 (largs[0], format_reloc);
+ − 722 gcpro1.nvars = nargs;
428
+ − 723
771
+ − 724 stream = make_resizing_buffer_output_stream ();
+ − 725 emacs_doprnt (stream, (Intbyte *) format_nonreloc, format_nonreloc ?
+ − 726 strlen (format_nonreloc) : 0,
+ − 727 format_reloc, nargs, largs);
428
+ − 728 Lstream_flush (XLSTREAM (stream));
+ − 729 obj = make_string (resizing_buffer_stream_ptr (XLSTREAM (stream)),
+ − 730 Lstream_byte_count (XLSTREAM (stream)));
771
+ − 731 Lstream_delete (XLSTREAM (stream));
428
+ − 732 UNGCPRO;
+ − 733 return obj;
+ − 734 }
+ − 735
771
+ − 736 /* Like emacs_vsprintf_string_lisp() but accepts its extra args directly
+ − 737 (using variable arguments), rather than as an array. */
+ − 738
428
+ − 739 Lisp_Object
771
+ − 740 emacs_sprintf_string_lisp (const CIntbyte *format_nonreloc,
+ − 741 Lisp_Object format_reloc, int nargs, ...)
428
+ − 742 {
771
+ − 743 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
+ − 744 va_list va;
+ − 745 int i;
428
+ − 746 Lisp_Object obj;
+ − 747
771
+ − 748 va_start (va, nargs);
+ − 749 for (i = 0; i < nargs; i++)
+ − 750 args[i] = va_arg (va, Lisp_Object);
+ − 751 va_end (va);
+ − 752 obj = emacs_vsprintf_string_lisp (format_nonreloc, format_reloc, nargs,
+ − 753 args);
428
+ − 754 return obj;
+ − 755 }
+ − 756
771
+ − 757 /* Like emacs_vsprintf_string_lisp() but returns a malloc()ed memory block.
+ − 758 Return length out through LEN_OUT, if not null. */
+ − 759
+ − 760 Intbyte *
+ − 761 emacs_vsprintf_malloc_lisp (const CIntbyte *format_nonreloc,
+ − 762 Lisp_Object format_reloc, int nargs,
+ − 763 const Lisp_Object *largs, Bytecount *len_out)
+ − 764 {
+ − 765 Lisp_Object stream;
+ − 766 Intbyte *retval;
+ − 767 Bytecount len;
+ − 768 struct gcpro gcpro1, gcpro2;
+ − 769
+ − 770 GCPRO2 (largs[0], format_reloc);
+ − 771 gcpro1.nvars = nargs;
+ − 772
+ − 773 stream = make_resizing_buffer_output_stream ();
+ − 774 emacs_doprnt (stream, (Intbyte *) format_nonreloc, format_nonreloc ?
+ − 775 strlen (format_nonreloc) : 0,
+ − 776 format_reloc, nargs, largs);
+ − 777 Lstream_flush (XLSTREAM (stream));
+ − 778 len = Lstream_byte_count (XLSTREAM (stream));
+ − 779 retval = (Intbyte *) xmalloc (len + 1);
+ − 780 memcpy (retval, resizing_buffer_stream_ptr (XLSTREAM (stream)), len);
+ − 781 retval[len] = '\0';
+ − 782 Lstream_delete (XLSTREAM (stream));
+ − 783
+ − 784 if (len_out)
+ − 785 *len_out = len;
+ − 786 UNGCPRO;
+ − 787 return retval;
+ − 788 }
+ − 789
+ − 790 /* Like emacs_sprintf_string_lisp() but returns a malloc()ed memory block.
+ − 791 Return length out through LEN_OUT, if not null. */
+ − 792
+ − 793 Intbyte *
+ − 794 emacs_sprintf_malloc_lisp (Bytecount *len_out, const CIntbyte *format_nonreloc,
+ − 795 Lisp_Object format_reloc, int nargs, ...)
+ − 796 {
+ − 797 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
+ − 798 va_list va;
+ − 799 int i;
+ − 800 Intbyte *retval;
+ − 801
+ − 802 va_start (va, nargs);
+ − 803 for (i = 0; i < nargs; i++)
+ − 804 args[i] = va_arg (va, Lisp_Object);
+ − 805 va_end (va);
+ − 806 retval = emacs_vsprintf_malloc_lisp (format_nonreloc, format_reloc, nargs,
+ − 807 args, len_out);
+ − 808 return retval;
+ − 809 }
+ − 810
+ − 811 /* vsprintf()-like replacement. Returns a Lisp string. Data
+ − 812 from Lisp strings is OK because we explicitly inhibit GC. */
+ − 813
428
+ − 814 Lisp_Object
771
+ − 815 emacs_vsprintf_string (const CIntbyte *format, va_list vargs)
428
+ − 816 {
771
+ − 817 Lisp_Object stream = make_resizing_buffer_output_stream ();
428
+ − 818 Lisp_Object obj;
771
+ − 819 int count = begin_gc_forbidden ();
428
+ − 820
771
+ − 821 emacs_doprnt_va (stream, (Intbyte *) format, strlen (format), Qnil,
+ − 822 vargs);
428
+ − 823 Lstream_flush (XLSTREAM (stream));
+ − 824 obj = make_string (resizing_buffer_stream_ptr (XLSTREAM (stream)),
+ − 825 Lstream_byte_count (XLSTREAM (stream)));
+ − 826 Lstream_delete (XLSTREAM (stream));
771
+ − 827 end_gc_forbidden (count);
428
+ − 828 return obj;
+ − 829 }
+ − 830
771
+ − 831 /* sprintf()-like replacement. Returns a Lisp string. Data
+ − 832 from Lisp strings is OK because we explicitly inhibit GC. */
+ − 833
428
+ − 834 Lisp_Object
771
+ − 835 emacs_sprintf_string (const CIntbyte *format, ...)
+ − 836 {
+ − 837 va_list vargs;
+ − 838 Lisp_Object retval;
+ − 839
+ − 840 va_start (vargs, format);
+ − 841 retval = emacs_vsprintf_string (format, vargs);
+ − 842 va_end (vargs);
+ − 843 return retval;
+ − 844 }
+ − 845
+ − 846 /* vsprintf()-like replacement. Returns a malloc()ed memory block. Data
+ − 847 from Lisp strings is OK because we explicitly inhibit GC. Return
+ − 848 length out through LEN_OUT, if not null. */
+ − 849
+ − 850 Intbyte *
+ − 851 emacs_vsprintf_malloc (const CIntbyte *format, va_list vargs,
+ − 852 Bytecount *len_out)
428
+ − 853 {
771
+ − 854 int count = begin_gc_forbidden ();
428
+ − 855 Lisp_Object stream = make_resizing_buffer_output_stream ();
771
+ − 856 Intbyte *retval;
+ − 857 Bytecount len;
+ − 858
+ − 859 emacs_doprnt_va (stream, (Intbyte *) format, strlen (format), Qnil,
+ − 860 vargs);
+ − 861 Lstream_flush (XLSTREAM (stream));
+ − 862 len = Lstream_byte_count (XLSTREAM (stream));
+ − 863 retval = (Intbyte *) xmalloc (len + 1);
+ − 864 memcpy (retval, resizing_buffer_stream_ptr (XLSTREAM (stream)), len);
+ − 865 retval[len] = '\0';
+ − 866 end_gc_forbidden (count);
+ − 867 Lstream_delete (XLSTREAM (stream));
+ − 868
+ − 869 if (len_out)
+ − 870 *len_out = len;
+ − 871 return retval;
+ − 872 }
+ − 873
+ − 874 /* sprintf()-like replacement. Returns a malloc()ed memory block. Data
+ − 875 from Lisp strings is OK because we explicitly inhibit GC. Return length
+ − 876 out through LEN_OUT, if not null. */
428
+ − 877
771
+ − 878 Intbyte *
+ − 879 emacs_sprintf_malloc (Bytecount *len_out, const CIntbyte *format, ...)
+ − 880 {
+ − 881 va_list vargs;
+ − 882 Intbyte *retval;
+ − 883
+ − 884 va_start (vargs, format);
+ − 885 retval = emacs_vsprintf_malloc (format, vargs, len_out);
428
+ − 886 va_end (vargs);
771
+ − 887 return retval;
+ − 888 }
+ − 889
+ − 890 /* vsprintf() replacement. Writes output into OUTPUT, which better
+ − 891 have enough space for the output. Data from Lisp strings is OK
+ − 892 because we explicitly inhibit GC. */
+ − 893
+ − 894 Bytecount
+ − 895 emacs_vsprintf (Intbyte *output, const CIntbyte *format, va_list vargs)
+ − 896 {
+ − 897 Bytecount retval;
+ − 898 int count = begin_gc_forbidden ();
+ − 899 Lisp_Object stream = make_resizing_buffer_output_stream ();
+ − 900 Bytecount len;
428
+ − 901
771
+ − 902 retval = emacs_doprnt_va (stream, (Intbyte *) format, strlen (format), Qnil,
+ − 903 vargs);
428
+ − 904 Lstream_flush (XLSTREAM (stream));
771
+ − 905 len = Lstream_byte_count (XLSTREAM (stream));
+ − 906 memcpy (output, resizing_buffer_stream_ptr (XLSTREAM (stream)), len);
+ − 907 output[len] = '\0';
+ − 908 end_gc_forbidden (count);
428
+ − 909 Lstream_delete (XLSTREAM (stream));
771
+ − 910
+ − 911 return retval;
428
+ − 912 }
771
+ − 913
+ − 914 /* sprintf() replacement. Writes output into OUTPUT, which better
+ − 915 have enough space for the output. Data from Lisp strings is OK
+ − 916 because we explicitly inhibit GC. */
+ − 917
+ − 918 Bytecount
+ − 919 emacs_sprintf (Intbyte *output, const CIntbyte *format, ...)
+ − 920 {
+ − 921 va_list vargs;
+ − 922 Bytecount retval;
+ − 923
+ − 924 va_start (vargs, format);
+ − 925 retval = emacs_vsprintf (output, format, vargs);
+ − 926 va_end (vargs);
+ − 927 return retval;
+ − 928 }
