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.
793
+ − 5 Copyright (C) 2001, 2002 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
793
+ − 27 /* Synched up with: Rewritten by Ben Wing. Not in FSF. */
428
+ − 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;
867
+ − 72 Ibyte *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
867
+ − 102 doprnt_2 (Lisp_Object stream, const Ibyte *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
867
+ − 124 static const Ibyte *
+ − 125 parse_off_posnum (const Ibyte *start, const Ibyte *end, int *returned_num)
428
+ − 126 {
867
+ − 127 Ibyte arg_convert[100];
+ − 128 REGISTER Ibyte *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
793
+ − 143 #define NEXT_ASCII_BYTE(ch) \
+ − 144 do { \
+ − 145 if (fmt == fmt_end) \
+ − 146 syntax_error ("Premature end of format string", Qunbound); \
+ − 147 ch = *fmt; \
+ − 148 if (ch >= 0200) \
+ − 149 syntax_error ("Non-ASCII character in format converter spec", \
+ − 150 Qunbound); \
+ − 151 fmt++; \
428
+ − 152 } while (0)
+ − 153
+ − 154 #define RESOLVE_FLAG_CONFLICTS(spec) \
+ − 155 do { \
+ − 156 if (spec.space_flag && spec.plus_flag) \
+ − 157 spec.space_flag = 0; \
+ − 158 if (spec.zero_flag && spec.space_flag) \
+ − 159 spec.zero_flag = 0; \
+ − 160 } while (0)
+ − 161
+ − 162 static printf_spec_dynarr *
867
+ − 163 parse_doprnt_spec (const Ibyte *format, Bytecount format_length)
428
+ − 164 {
867
+ − 165 const Ibyte *fmt = format;
+ − 166 const Ibyte *fmt_end = format + format_length;
428
+ − 167 printf_spec_dynarr *specs = Dynarr_new (printf_spec);
+ − 168 int prev_argnum = 0;
+ − 169
+ − 170 while (1)
+ − 171 {
+ − 172 struct printf_spec spec;
867
+ − 173 const Ibyte *text_end;
+ − 174 Ibyte ch;
428
+ − 175
+ − 176 xzero (spec);
+ − 177 if (fmt == fmt_end)
+ − 178 return specs;
867
+ − 179 text_end = (Ibyte *) memchr (fmt, '%', fmt_end - fmt);
428
+ − 180 if (!text_end)
+ − 181 text_end = fmt_end;
+ − 182 spec.text_before = fmt - format;
+ − 183 spec.text_before_len = text_end - fmt;
+ − 184 fmt = text_end;
+ − 185 if (fmt != fmt_end)
+ − 186 {
+ − 187 fmt++; /* skip over % */
+ − 188
+ − 189 /* A % is special -- no arg number. According to ANSI specs,
+ − 190 field width does not apply to %% conversion. */
+ − 191 if (fmt != fmt_end && *fmt == '%')
+ − 192 {
+ − 193 spec.converter = '%';
+ − 194 Dynarr_add (specs, spec);
+ − 195 fmt++;
+ − 196 continue;
+ − 197 }
+ − 198
+ − 199 /* Is there a field number specifier? */
+ − 200 {
867
+ − 201 const Ibyte *ptr;
428
+ − 202 int fieldspec;
+ − 203
+ − 204 ptr = parse_off_posnum (fmt, fmt_end, &fieldspec);
+ − 205 if (fieldspec > 0 && ptr != fmt_end && *ptr == '$')
+ − 206 {
+ − 207 /* There is a format specifier */
+ − 208 prev_argnum = fieldspec;
+ − 209 fmt = ptr + 1;
+ − 210 }
+ − 211 else
+ − 212 prev_argnum++;
+ − 213 spec.argnum = prev_argnum;
+ − 214 }
+ − 215
+ − 216 /* Parse off any flags */
+ − 217 NEXT_ASCII_BYTE (ch);
+ − 218 while (strchr (valid_flags, ch))
+ − 219 {
+ − 220 switch (ch)
+ − 221 {
446
+ − 222 case '-': spec.minus_flag = 1; break;
+ − 223 case '+': spec.plus_flag = 1; break;
+ − 224 case ' ': spec.space_flag = 1; break;
428
+ − 225 case '#': spec.number_flag = 1; break;
446
+ − 226 case '0': spec.zero_flag = 1; break;
428
+ − 227 default: abort ();
+ − 228 }
+ − 229 NEXT_ASCII_BYTE (ch);
+ − 230 }
+ − 231
+ − 232 /* Parse off the minimum field width */
+ − 233 fmt--; /* back up */
+ − 234
+ − 235 /*
+ − 236 * * means the field width was passed as an argument.
+ − 237 * Mark the current spec as one that forwards its
+ − 238 * field width and flags to the next spec in the array.
+ − 239 * Then create a new spec and continue with the parsing.
+ − 240 */
+ − 241 if (fmt != fmt_end && *fmt == '*')
+ − 242 {
+ − 243 spec.converter = '*';
+ − 244 RESOLVE_FLAG_CONFLICTS(spec);
+ − 245 Dynarr_add (specs, spec);
+ − 246 xzero (spec);
+ − 247 spec.argnum = ++prev_argnum;
+ − 248 fmt++;
+ − 249 }
+ − 250 else
+ − 251 {
+ − 252 fmt = parse_off_posnum (fmt, fmt_end, &spec.minwidth);
+ − 253 if (spec.minwidth == -1)
+ − 254 spec.minwidth = 0;
+ − 255 }
+ − 256
+ − 257 /* Parse off any precision specified */
+ − 258 NEXT_ASCII_BYTE (ch);
+ − 259 if (ch == '.')
+ − 260 {
+ − 261 /*
+ − 262 * * means the precision was passed as an argument.
+ − 263 * Mark the current spec as one that forwards its
+ − 264 * fieldwidth, flags and precision to the next spec in
+ − 265 * the array. Then create a new spec and continue
+ − 266 * with the parse.
+ − 267 */
+ − 268 if (fmt != fmt_end && *fmt == '*')
+ − 269 {
+ − 270 spec.converter = '*';
+ − 271 spec.forwarding_precision = 1;
+ − 272 RESOLVE_FLAG_CONFLICTS(spec);
+ − 273 Dynarr_add (specs, spec);
+ − 274 xzero (spec);
+ − 275 spec.argnum = ++prev_argnum;
+ − 276 fmt++;
+ − 277 }
+ − 278 else
+ − 279 {
+ − 280 fmt = parse_off_posnum (fmt, fmt_end, &spec.precision);
+ − 281 if (spec.precision == -1)
+ − 282 spec.precision = 0;
+ − 283 }
+ − 284 NEXT_ASCII_BYTE (ch);
+ − 285 }
+ − 286 else
+ − 287 /* No precision specified */
+ − 288 spec.precision = -1;
+ − 289
+ − 290 /* Parse off h or l flag */
+ − 291 if (ch == 'h' || ch == 'l')
+ − 292 {
+ − 293 if (ch == 'h')
+ − 294 spec.h_flag = 1;
+ − 295 else
+ − 296 spec.l_flag = 1;
+ − 297 NEXT_ASCII_BYTE (ch);
+ − 298 }
+ − 299
+ − 300 if (!strchr (valid_converters, ch))
563
+ − 301 syntax_error ("Invalid converter character", make_char (ch));
428
+ − 302 spec.converter = ch;
+ − 303 }
+ − 304
+ − 305 RESOLVE_FLAG_CONFLICTS(spec);
+ − 306 Dynarr_add (specs, spec);
+ − 307 }
+ − 308
1204
+ − 309 RETURN_NOT_REACHED(specs); /* suppress compiler warning */
428
+ − 310 }
+ − 311
+ − 312 static int
+ − 313 get_args_needed (printf_spec_dynarr *specs)
+ − 314 {
+ − 315 int args_needed = 0;
+ − 316 REGISTER int i;
+ − 317
+ − 318 /* Figure out how many args are needed. This may be less than
+ − 319 the number of specs because a spec could be %% or could be
+ − 320 missing (literal text at end of format string) or there
+ − 321 could be specs where the field number is explicitly given.
+ − 322 We just look for the maximum argument number that's referenced. */
+ − 323
+ − 324 for (i = 0; i < Dynarr_length (specs); i++)
+ − 325 {
+ − 326 char ch = Dynarr_at (specs, i).converter;
+ − 327 if (ch && ch != '%')
+ − 328 {
+ − 329 int argnum = Dynarr_at (specs, i).argnum;
+ − 330 if (argnum > args_needed)
+ − 331 args_needed = argnum;
+ − 332 }
+ − 333 }
+ − 334
+ − 335 return args_needed;
+ − 336 }
+ − 337
+ − 338 static printf_arg_dynarr *
+ − 339 get_doprnt_args (printf_spec_dynarr *specs, va_list vargs)
+ − 340 {
+ − 341 printf_arg_dynarr *args = Dynarr_new (printf_arg);
+ − 342 union printf_arg arg;
+ − 343 REGISTER int i;
+ − 344 int args_needed = get_args_needed (specs);
+ − 345
+ − 346 xzero (arg);
+ − 347 for (i = 1; i <= args_needed; i++)
+ − 348 {
+ − 349 int j;
+ − 350 char ch;
+ − 351 struct printf_spec *spec = 0;
+ − 352
+ − 353 for (j = 0; j < Dynarr_length (specs); j++)
+ − 354 {
+ − 355 spec = Dynarr_atp (specs, j);
+ − 356 if (spec->argnum == i)
+ − 357 break;
+ − 358 }
+ − 359
+ − 360 if (j == Dynarr_length (specs))
563
+ − 361 syntax_error ("No conversion spec for argument", make_int (i));
428
+ − 362
+ − 363 ch = spec->converter;
+ − 364
+ − 365 if (strchr (int_converters, ch))
+ − 366 {
446
+ − 367 if (spec->l_flag)
428
+ − 368 arg.l = va_arg (vargs, long);
+ − 369 else
446
+ − 370 /* int even if ch == 'c' or spec->h_flag:
+ − 371 "the type used in va_arg is supposed to match the
+ − 372 actual type **after default promotions**."
+ − 373 Hence we read an int, not a short, if spec->h_flag. */
+ − 374 arg.l = va_arg (vargs, int);
428
+ − 375 }
+ − 376 else if (strchr (unsigned_int_converters, ch))
+ − 377 {
446
+ − 378 if (spec->l_flag)
428
+ − 379 arg.ul = va_arg (vargs, unsigned long);
+ − 380 else
446
+ − 381 /* unsigned int even if ch == 'c' or spec->h_flag */
+ − 382 arg.ul = (unsigned long) va_arg (vargs, unsigned int);
428
+ − 383 }
+ − 384 else if (strchr (double_converters, ch))
+ − 385 arg.d = va_arg (vargs, double);
+ − 386 else if (strchr (string_converters, ch))
867
+ − 387 arg.bp = va_arg (vargs, Ibyte *);
428
+ − 388 else abort ();
+ − 389
+ − 390 Dynarr_add (args, arg);
+ − 391 }
+ − 392
+ − 393 return args;
+ − 394 }
+ − 395
771
+ − 396 /* Most basic entry point into string formatting.
+ − 397
+ − 398 Generate output from a format-spec (either a Lisp string
+ − 399 FORMAT_RELOC, or a C string FORMAT_NONRELOC of length FORMAT_LENGTH
+ − 400 -- which *MUST NOT* come from Lisp string data, unless GC is
+ − 401 inhibited). Output goes to STREAM. Returns the number of bytes
+ − 402 stored into STREAM. Arguments are either C-type arguments in
+ − 403 va_list VARGS, or an array of Lisp objects in LARGS of size
+ − 404 NARGS. (Behavior is different in the two cases -- you either get
+ − 405 standard sprintf() behavior or `format' behavior.) */
428
+ − 406
+ − 407 static Bytecount
867
+ − 408 emacs_doprnt_1 (Lisp_Object stream, const Ibyte *format_nonreloc,
771
+ − 409 Bytecount format_length, Lisp_Object format_reloc,
+ − 410 int nargs, const Lisp_Object *largs, va_list vargs)
428
+ − 411 {
+ − 412 printf_spec_dynarr *specs = 0;
+ − 413 printf_arg_dynarr *args = 0;
+ − 414 REGISTER int i;
+ − 415 int init_byte_count = Lstream_byte_count (XLSTREAM (stream));
771
+ − 416 int count;
428
+ − 417
+ − 418 if (!NILP (format_reloc))
+ − 419 {
+ − 420 format_nonreloc = XSTRING_DATA (format_reloc);
+ − 421 format_length = XSTRING_LENGTH (format_reloc);
+ − 422 }
+ − 423 if (format_length < 0)
442
+ − 424 format_length = (Bytecount) strlen ((const char *) format_nonreloc);
428
+ − 425
+ − 426 specs = parse_doprnt_spec (format_nonreloc, format_length);
771
+ − 427 count = record_unwind_protect_freeing_dynarr (specs);
+ − 428
428
+ − 429 if (largs)
+ − 430 {
446
+ − 431 /* allow too many args for string, but not too few */
428
+ − 432 if (nargs < get_args_needed (specs))
563
+ − 433 signal_error_1 (Qwrong_number_of_arguments,
428
+ − 434 list3 (Qformat,
+ − 435 make_int (nargs),
+ − 436 !NILP (format_reloc) ? format_reloc :
+ − 437 make_string (format_nonreloc, format_length)));
+ − 438 }
+ − 439 else
+ − 440 {
+ − 441 args = get_doprnt_args (specs, vargs);
771
+ − 442 record_unwind_protect_freeing_dynarr (args);
428
+ − 443 }
+ − 444
+ − 445 for (i = 0; i < Dynarr_length (specs); i++)
+ − 446 {
+ − 447 struct printf_spec *spec = Dynarr_atp (specs, i);
+ − 448 char ch;
+ − 449
+ − 450 /* Copy the text before */
+ − 451 if (!NILP (format_reloc)) /* refetch in case of GC below */
+ − 452 format_nonreloc = XSTRING_DATA (format_reloc);
446
+ − 453
771
+ − 454 doprnt_2 (stream, format_nonreloc + spec->text_before,
446
+ − 455 spec->text_before_len, 0, -1, 0, 0);
428
+ − 456
+ − 457 ch = spec->converter;
+ − 458
+ − 459 if (!ch)
+ − 460 continue;
+ − 461
+ − 462 if (ch == '%')
+ − 463 {
867
+ − 464 doprnt_2 (stream, (Ibyte *) &ch, 1, 0, -1, 0, 0);
428
+ − 465 continue;
+ − 466 }
+ − 467
+ − 468 /* The char '*' as converter means the field width, precision
+ − 469 was specified as an argument. Extract the data and forward
+ − 470 it to the next spec, to which it will apply. */
+ − 471 if (ch == '*')
+ − 472 {
+ − 473 struct printf_spec *nextspec = Dynarr_atp (specs, i + 1);
+ − 474 Lisp_Object obj = largs[spec->argnum - 1];
+ − 475
+ − 476 if (INTP (obj))
+ − 477 {
+ − 478 if (spec->forwarding_precision)
+ − 479 {
+ − 480 nextspec->precision = XINT (obj);
+ − 481 nextspec->minwidth = spec->minwidth;
+ − 482 }
+ − 483 else
+ − 484 {
+ − 485 nextspec->minwidth = XINT (obj);
446
+ − 486 if (XINT (obj) < 0)
428
+ − 487 {
+ − 488 spec->minus_flag = 1;
+ − 489 nextspec->minwidth = - nextspec->minwidth;
+ − 490 }
+ − 491 }
446
+ − 492 nextspec->minus_flag = spec->minus_flag;
+ − 493 nextspec->plus_flag = spec->plus_flag;
+ − 494 nextspec->space_flag = spec->space_flag;
428
+ − 495 nextspec->number_flag = spec->number_flag;
446
+ − 496 nextspec->zero_flag = spec->zero_flag;
428
+ − 497 }
+ − 498 continue;
+ − 499 }
+ − 500
+ − 501 if (largs && (spec->argnum < 1 || spec->argnum > nargs))
771
+ − 502 syntax_error ("Invalid repositioning argument",
+ − 503 make_int (spec->argnum));
428
+ − 504
+ − 505 else if (ch == 'S' || ch == 's')
+ − 506 {
867
+ − 507 Ibyte *string;
428
+ − 508 Bytecount string_len;
+ − 509
+ − 510 if (!largs)
+ − 511 {
+ − 512 string = Dynarr_at (args, spec->argnum - 1).bp;
771
+ − 513 #if 0
+ − 514 /* [[ error() can be called with null string arguments.
428
+ − 515 E.g., in fileio.c, the return value of strerror()
+ − 516 is never checked. We'll print (null), like some
+ − 517 printf implementations do. Would it be better (and safe)
+ − 518 to signal an error instead? Or should we just use the
771
+ − 519 empty string? -dkindred@cs.cmu.edu 8/1997 ]]
+ − 520 Do not hide bugs. --ben
428
+ − 521 */
+ − 522 if (!string)
867
+ − 523 string = (Ibyte *) "(null)";
771
+ − 524 #else
+ − 525 assert (string);
+ − 526 #endif
428
+ − 527 string_len = strlen ((char *) string);
+ − 528 }
+ − 529 else
+ − 530 {
+ − 531 Lisp_Object obj = largs[spec->argnum - 1];
793
+ − 532 Lisp_Object ls;
428
+ − 533
+ − 534 if (ch == 'S')
+ − 535 {
+ − 536 /* For `S', prin1 the argument and then treat like
+ − 537 a string. */
793
+ − 538 ls = Fprin1_to_string (obj, Qnil);
428
+ − 539 }
+ − 540 else if (STRINGP (obj))
793
+ − 541 ls = obj;
428
+ − 542 else if (SYMBOLP (obj))
+ − 543 ls = XSYMBOL (obj)->name;
+ − 544 else
+ − 545 {
+ − 546 /* convert to string using princ. */
793
+ − 547 ls = Fprin1_to_string (obj, Qt);
428
+ − 548 }
793
+ − 549 string = XSTRING_DATA (ls);
+ − 550 string_len = XSTRING_LENGTH (ls);
428
+ − 551 }
+ − 552
771
+ − 553 doprnt_2 (stream, string, string_len, spec->minwidth,
428
+ − 554 spec->precision, spec->minus_flag, spec->zero_flag);
+ − 555 }
+ − 556
+ − 557 else
+ − 558 {
+ − 559 /* Must be a number. */
+ − 560 union printf_arg arg;
+ − 561
+ − 562 if (!largs)
+ − 563 {
+ − 564 arg = Dynarr_at (args, spec->argnum - 1);
+ − 565 }
+ − 566 else
+ − 567 {
+ − 568 Lisp_Object obj = largs[spec->argnum - 1];
+ − 569 if (CHARP (obj))
+ − 570 obj = make_int (XCHAR (obj));
+ − 571 if (!INT_OR_FLOATP (obj))
+ − 572 {
793
+ − 573 syntax_error
+ − 574 ("format specifier %%%c doesn't match argument type",
+ − 575 make_char (ch));
428
+ − 576 }
+ − 577 else if (strchr (double_converters, ch))
+ − 578 arg.d = XFLOATINT (obj);
+ − 579 else
+ − 580 {
446
+ − 581 if (FLOATP (obj))
+ − 582 obj = Ftruncate (obj);
428
+ − 583
+ − 584 if (strchr (unsigned_int_converters, ch))
446
+ − 585 arg.ul = (unsigned long) XINT (obj);
428
+ − 586 else
446
+ − 587 arg.l = XINT (obj);
428
+ − 588 }
+ − 589 }
+ − 590
+ − 591
+ − 592 if (ch == 'c')
+ − 593 {
867
+ − 594 Ichar a;
428
+ − 595 Bytecount charlen;
867
+ − 596 Ibyte charbuf[MAX_ICHAR_LEN];
428
+ − 597
867
+ − 598 a = (Ichar) arg.l;
428
+ − 599
867
+ − 600 if (!valid_ichar_p (a))
793
+ − 601 syntax_error ("invalid character value %d to %%c spec",
831
+ − 602 make_int (a));
428
+ − 603
867
+ − 604 charlen = set_itext_ichar (charbuf, a);
771
+ − 605 doprnt_2 (stream, charbuf, charlen, spec->minwidth,
428
+ − 606 -1, spec->minus_flag, spec->zero_flag);
+ − 607 }
+ − 608 else
+ − 609 {
448
+ − 610 /* ASCII Decimal representation uses 2.4 times as many
+ − 611 bits as machine binary. */
+ − 612 char *text_to_print =
+ − 613 alloca_array (char, 32 +
+ − 614 max (spec->minwidth,
647
+ − 615 (int) max (sizeof (double),
+ − 616 sizeof (long)) * 3 +
448
+ − 617 max (spec->precision, 0)));
428
+ − 618 char constructed_spec[100];
446
+ − 619 char *p = constructed_spec;
428
+ − 620
448
+ − 621 /* Mostly reconstruct the spec and use sprintf() to
428
+ − 622 format the string. */
+ − 623
446
+ − 624 *p++ = '%';
+ − 625 if (spec->plus_flag) *p++ = '+';
+ − 626 if (spec->space_flag) *p++ = ' ';
+ − 627 if (spec->number_flag) *p++ = '#';
448
+ − 628 if (spec->minus_flag) *p++ = '-';
+ − 629 if (spec->zero_flag) *p++ = '0';
446
+ − 630
448
+ − 631 if (spec->minwidth >= 0)
577
+ − 632 {
+ − 633 long_to_string (p, spec->minwidth);
+ − 634 p += strlen (p);
+ − 635 }
448
+ − 636 if (spec->precision >= 0)
428
+ − 637 {
446
+ − 638 *p++ = '.';
577
+ − 639 long_to_string (p, spec->precision);
+ − 640 p += strlen (p);
428
+ − 641 }
448
+ − 642
428
+ − 643 if (strchr (double_converters, ch))
442
+ − 644 {
446
+ − 645 *p++ = ch;
+ − 646 *p++ = '\0';
442
+ − 647 sprintf (text_to_print, constructed_spec, arg.d);
+ − 648 }
428
+ − 649 else
+ − 650 {
448
+ − 651 *p++ = 'l'; /* Always use longs with sprintf() */
+ − 652 *p++ = ch;
+ − 653 *p++ = '\0';
446
+ − 654
+ − 655 if (strchr (unsigned_int_converters, ch))
+ − 656 sprintf (text_to_print, constructed_spec, arg.ul);
+ − 657 else
428
+ − 658 sprintf (text_to_print, constructed_spec, arg.l);
+ − 659 }
+ − 660
867
+ − 661 doprnt_2 (stream, (Ibyte *) text_to_print,
448
+ − 662 strlen (text_to_print), 0, -1, 0, 0);
428
+ − 663 }
+ − 664 }
+ − 665 }
+ − 666
771
+ − 667 unbind_to (count);
428
+ − 668 return Lstream_byte_count (XLSTREAM (stream)) - init_byte_count;
+ − 669 }
+ − 670
771
+ − 671 /* Basic external entry point into string formatting. See
+ − 672 emacs_doprnt_1().
+ − 673 */
+ − 674
+ − 675 Bytecount
867
+ − 676 emacs_doprnt_va (Lisp_Object stream, const Ibyte *format_nonreloc,
771
+ − 677 Bytecount format_length, Lisp_Object format_reloc,
+ − 678 va_list vargs)
+ − 679 {
+ − 680 return emacs_doprnt_1 (stream, format_nonreloc, format_length,
+ − 681 format_reloc, 0, 0, vargs);
+ − 682 }
+ − 683
+ − 684 /* Basic external entry point into string formatting. See
+ − 685 emacs_doprnt_1().
+ − 686 */
+ − 687
+ − 688 Bytecount
867
+ − 689 emacs_doprnt (Lisp_Object stream, const Ibyte *format_nonreloc,
771
+ − 690 Bytecount format_length, Lisp_Object format_reloc,
+ − 691 int nargs, const Lisp_Object *largs, ...)
428
+ − 692 {
+ − 693 va_list vargs;
+ − 694 Bytecount val;
+ − 695 va_start (vargs, largs);
771
+ − 696 val = emacs_doprnt_1 (stream, format_nonreloc, format_length,
+ − 697 format_reloc, nargs, largs, vargs);
428
+ − 698 va_end (vargs);
+ − 699 return val;
+ − 700 }
+ − 701
771
+ − 702 /* Similar to `format' in that its arguments are Lisp objects rather than C
+ − 703 objects. (For the versions that take C objects, see the
+ − 704 emacs_[v]sprintf... functions below.) Accepts the format string as
+ − 705 either a C string (FORMAT_NONRELOC, which *MUST NOT* come from Lisp
+ − 706 string data, unless GC is inhibited) or a Lisp string (FORMAT_RELOC).
+ − 707 Return resulting formatted string as a Lisp string.
428
+ − 708
771
+ − 709 All arguments are GCPRO'd, including FORMAT_RELOC; this makes it OK to
+ − 710 pass newly created objects into this function (as often happens).
428
+ − 711
771
+ − 712 #### It shouldn't be necessary to specify the number of arguments.
+ − 713 This would require some rewriting of the doprnt() functions, though.
+ − 714 */
428
+ − 715
+ − 716 Lisp_Object
867
+ − 717 emacs_vsprintf_string_lisp (const CIbyte *format_nonreloc,
771
+ − 718 Lisp_Object format_reloc, int nargs,
+ − 719 const Lisp_Object *largs)
428
+ − 720 {
771
+ − 721 Lisp_Object stream;
428
+ − 722 Lisp_Object obj;
771
+ − 723 struct gcpro gcpro1, gcpro2;
+ − 724 GCPRO2 (largs[0], format_reloc);
+ − 725 gcpro1.nvars = nargs;
428
+ − 726
771
+ − 727 stream = make_resizing_buffer_output_stream ();
867
+ − 728 emacs_doprnt (stream, (Ibyte *) format_nonreloc, format_nonreloc ?
771
+ − 729 strlen (format_nonreloc) : 0,
+ − 730 format_reloc, nargs, largs);
428
+ − 731 Lstream_flush (XLSTREAM (stream));
+ − 732 obj = make_string (resizing_buffer_stream_ptr (XLSTREAM (stream)),
+ − 733 Lstream_byte_count (XLSTREAM (stream)));
771
+ − 734 Lstream_delete (XLSTREAM (stream));
428
+ − 735 UNGCPRO;
+ − 736 return obj;
+ − 737 }
+ − 738
771
+ − 739 /* Like emacs_vsprintf_string_lisp() but accepts its extra args directly
+ − 740 (using variable arguments), rather than as an array. */
+ − 741
428
+ − 742 Lisp_Object
867
+ − 743 emacs_sprintf_string_lisp (const CIbyte *format_nonreloc,
771
+ − 744 Lisp_Object format_reloc, int nargs, ...)
428
+ − 745 {
771
+ − 746 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
+ − 747 va_list va;
+ − 748 int i;
428
+ − 749 Lisp_Object obj;
+ − 750
771
+ − 751 va_start (va, nargs);
+ − 752 for (i = 0; i < nargs; i++)
+ − 753 args[i] = va_arg (va, Lisp_Object);
+ − 754 va_end (va);
+ − 755 obj = emacs_vsprintf_string_lisp (format_nonreloc, format_reloc, nargs,
+ − 756 args);
428
+ − 757 return obj;
+ − 758 }
+ − 759
771
+ − 760 /* Like emacs_vsprintf_string_lisp() but returns a malloc()ed memory block.
+ − 761 Return length out through LEN_OUT, if not null. */
+ − 762
867
+ − 763 Ibyte *
+ − 764 emacs_vsprintf_malloc_lisp (const CIbyte *format_nonreloc,
771
+ − 765 Lisp_Object format_reloc, int nargs,
+ − 766 const Lisp_Object *largs, Bytecount *len_out)
+ − 767 {
+ − 768 Lisp_Object stream;
867
+ − 769 Ibyte *retval;
771
+ − 770 Bytecount len;
+ − 771 struct gcpro gcpro1, gcpro2;
+ − 772
+ − 773 GCPRO2 (largs[0], format_reloc);
+ − 774 gcpro1.nvars = nargs;
+ − 775
+ − 776 stream = make_resizing_buffer_output_stream ();
867
+ − 777 emacs_doprnt (stream, (Ibyte *) format_nonreloc, format_nonreloc ?
771
+ − 778 strlen (format_nonreloc) : 0,
+ − 779 format_reloc, nargs, largs);
+ − 780 Lstream_flush (XLSTREAM (stream));
+ − 781 len = Lstream_byte_count (XLSTREAM (stream));
867
+ − 782 retval = (Ibyte *) xmalloc (len + 1);
771
+ − 783 memcpy (retval, resizing_buffer_stream_ptr (XLSTREAM (stream)), len);
+ − 784 retval[len] = '\0';
+ − 785 Lstream_delete (XLSTREAM (stream));
+ − 786
+ − 787 if (len_out)
+ − 788 *len_out = len;
+ − 789 UNGCPRO;
+ − 790 return retval;
+ − 791 }
+ − 792
+ − 793 /* Like emacs_sprintf_string_lisp() but returns a malloc()ed memory block.
+ − 794 Return length out through LEN_OUT, if not null. */
+ − 795
867
+ − 796 Ibyte *
+ − 797 emacs_sprintf_malloc_lisp (Bytecount *len_out, const CIbyte *format_nonreloc,
771
+ − 798 Lisp_Object format_reloc, int nargs, ...)
+ − 799 {
+ − 800 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
+ − 801 va_list va;
+ − 802 int i;
867
+ − 803 Ibyte *retval;
771
+ − 804
+ − 805 va_start (va, nargs);
+ − 806 for (i = 0; i < nargs; i++)
+ − 807 args[i] = va_arg (va, Lisp_Object);
+ − 808 va_end (va);
+ − 809 retval = emacs_vsprintf_malloc_lisp (format_nonreloc, format_reloc, nargs,
+ − 810 args, len_out);
+ − 811 return retval;
+ − 812 }
+ − 813
+ − 814 /* vsprintf()-like replacement. Returns a Lisp string. Data
+ − 815 from Lisp strings is OK because we explicitly inhibit GC. */
+ − 816
428
+ − 817 Lisp_Object
867
+ − 818 emacs_vsprintf_string (const CIbyte *format, va_list vargs)
428
+ − 819 {
771
+ − 820 Lisp_Object stream = make_resizing_buffer_output_stream ();
428
+ − 821 Lisp_Object obj;
771
+ − 822 int count = begin_gc_forbidden ();
428
+ − 823
867
+ − 824 emacs_doprnt_va (stream, (Ibyte *) format, strlen (format), Qnil,
771
+ − 825 vargs);
428
+ − 826 Lstream_flush (XLSTREAM (stream));
+ − 827 obj = make_string (resizing_buffer_stream_ptr (XLSTREAM (stream)),
+ − 828 Lstream_byte_count (XLSTREAM (stream)));
+ − 829 Lstream_delete (XLSTREAM (stream));
771
+ − 830 end_gc_forbidden (count);
428
+ − 831 return obj;
+ − 832 }
+ − 833
771
+ − 834 /* sprintf()-like replacement. Returns a Lisp string. Data
+ − 835 from Lisp strings is OK because we explicitly inhibit GC. */
+ − 836
428
+ − 837 Lisp_Object
867
+ − 838 emacs_sprintf_string (const CIbyte *format, ...)
771
+ − 839 {
+ − 840 va_list vargs;
+ − 841 Lisp_Object retval;
+ − 842
+ − 843 va_start (vargs, format);
+ − 844 retval = emacs_vsprintf_string (format, vargs);
+ − 845 va_end (vargs);
+ − 846 return retval;
+ − 847 }
+ − 848
+ − 849 /* vsprintf()-like replacement. Returns a malloc()ed memory block. Data
+ − 850 from Lisp strings is OK because we explicitly inhibit GC. Return
+ − 851 length out through LEN_OUT, if not null. */
+ − 852
867
+ − 853 Ibyte *
+ − 854 emacs_vsprintf_malloc (const CIbyte *format, va_list vargs,
771
+ − 855 Bytecount *len_out)
428
+ − 856 {
771
+ − 857 int count = begin_gc_forbidden ();
428
+ − 858 Lisp_Object stream = make_resizing_buffer_output_stream ();
867
+ − 859 Ibyte *retval;
771
+ − 860 Bytecount len;
+ − 861
867
+ − 862 emacs_doprnt_va (stream, (Ibyte *) format, strlen (format), Qnil,
771
+ − 863 vargs);
+ − 864 Lstream_flush (XLSTREAM (stream));
+ − 865 len = Lstream_byte_count (XLSTREAM (stream));
867
+ − 866 retval = (Ibyte *) xmalloc (len + 1);
771
+ − 867 memcpy (retval, resizing_buffer_stream_ptr (XLSTREAM (stream)), len);
+ − 868 retval[len] = '\0';
+ − 869 end_gc_forbidden (count);
+ − 870 Lstream_delete (XLSTREAM (stream));
+ − 871
+ − 872 if (len_out)
+ − 873 *len_out = len;
+ − 874 return retval;
+ − 875 }
+ − 876
+ − 877 /* sprintf()-like replacement. Returns a malloc()ed memory block. Data
+ − 878 from Lisp strings is OK because we explicitly inhibit GC. Return length
+ − 879 out through LEN_OUT, if not null. */
428
+ − 880
867
+ − 881 Ibyte *
+ − 882 emacs_sprintf_malloc (Bytecount *len_out, const CIbyte *format, ...)
771
+ − 883 {
+ − 884 va_list vargs;
867
+ − 885 Ibyte *retval;
771
+ − 886
+ − 887 va_start (vargs, format);
+ − 888 retval = emacs_vsprintf_malloc (format, vargs, len_out);
428
+ − 889 va_end (vargs);
771
+ − 890 return retval;
+ − 891 }
+ − 892
+ − 893 /* vsprintf() replacement. Writes output into OUTPUT, which better
+ − 894 have enough space for the output. Data from Lisp strings is OK
+ − 895 because we explicitly inhibit GC. */
+ − 896
+ − 897 Bytecount
867
+ − 898 emacs_vsprintf (Ibyte *output, const CIbyte *format, va_list vargs)
771
+ − 899 {
+ − 900 Bytecount retval;
+ − 901 int count = begin_gc_forbidden ();
+ − 902 Lisp_Object stream = make_resizing_buffer_output_stream ();
+ − 903 Bytecount len;
428
+ − 904
867
+ − 905 retval = emacs_doprnt_va (stream, (Ibyte *) format, strlen (format), Qnil,
771
+ − 906 vargs);
428
+ − 907 Lstream_flush (XLSTREAM (stream));
771
+ − 908 len = Lstream_byte_count (XLSTREAM (stream));
+ − 909 memcpy (output, resizing_buffer_stream_ptr (XLSTREAM (stream)), len);
+ − 910 output[len] = '\0';
+ − 911 end_gc_forbidden (count);
428
+ − 912 Lstream_delete (XLSTREAM (stream));
771
+ − 913
+ − 914 return retval;
428
+ − 915 }
771
+ − 916
+ − 917 /* sprintf() replacement. Writes output into OUTPUT, which better
+ − 918 have enough space for the output. Data from Lisp strings is OK
+ − 919 because we explicitly inhibit GC. */
+ − 920
+ − 921 Bytecount
867
+ − 922 emacs_sprintf (Ibyte *output, const CIbyte *format, ...)
771
+ − 923 {
+ − 924 va_list vargs;
+ − 925 Bytecount retval;
+ − 926
+ − 927 va_start (vargs, format);
+ − 928 retval = emacs_vsprintf (output, format, vargs);
+ − 929 va_end (vargs);
+ − 930 return retval;
+ − 931 }
