source: trunk/essentials/sys-devel/m4/lib/printf-parse.c

Last change on this file was 3090, checked in by bird, 18 years ago

m4 1.4.8
File size: 12.2 KB
Line 
1/* Formatted output to strings.
2 Copyright (C) 1999-2000, 2002-2003, 2006 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17
18#include <config.h>
19
20/* Specification. */
21#if WIDE_CHAR_VERSION
22# include "wprintf-parse.h"
23#else
24# include "printf-parse.h"
25#endif
26
27/* Get size_t, NULL. */
28#include <stddef.h>
29
30/* Get intmax_t. */
31#if HAVE_STDINT_H_WITH_UINTMAX
32# include <stdint.h>
33#endif
34#if HAVE_INTTYPES_H_WITH_UINTMAX
35# include <inttypes.h>
36#endif
37
38/* malloc(), realloc(), free(). */
39#include <stdlib.h>
40
41/* Checked size_t computations. */
42#include "xsize.h"
43
44#if WIDE_CHAR_VERSION
45# define PRINTF_PARSE wprintf_parse
46# define CHAR_T wchar_t
47# define DIRECTIVE wchar_t_directive
48# define DIRECTIVES wchar_t_directives
49#else
50# define PRINTF_PARSE printf_parse
51# define CHAR_T char
52# define DIRECTIVE char_directive
53# define DIRECTIVES char_directives
54#endif
55
56#ifdef STATIC
57STATIC
58#endif
59int
60PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
61{
62 const CHAR_T *cp = format; /* pointer into format */
63 size_t arg_posn = 0; /* number of regular arguments consumed */
64 size_t d_allocated; /* allocated elements of d->dir */
65 size_t a_allocated; /* allocated elements of a->arg */
66 size_t max_width_length = 0;
67 size_t max_precision_length = 0;
68
69 d->count = 0;
70 d_allocated = 1;
71 d->dir = (DIRECTIVE *) malloc (d_allocated * sizeof (DIRECTIVE));
72 if (d->dir == NULL)
73 /* Out of memory. */
74 return -1;
75
76 a->count = 0;
77 a_allocated = 0;
78 a->arg = NULL;
79
80#define REGISTER_ARG(_index_,_type_) \
81 { \
82 size_t n = (_index_); \
83 if (n >= a_allocated) \
84 { \
85 size_t memory_size; \
86 argument *memory; \
87 \
88 a_allocated = xtimes (a_allocated, 2); \
89 if (a_allocated <= n) \
90 a_allocated = xsum (n, 1); \
91 memory_size = xtimes (a_allocated, sizeof (argument)); \
92 if (size_overflow_p (memory_size)) \
93 /* Overflow, would lead to out of memory. */ \
94 goto error; \
95 memory = (argument *) (a->arg \
96 ? realloc (a->arg, memory_size) \
97 : malloc (memory_size)); \
98 if (memory == NULL) \
99 /* Out of memory. */ \
100 goto error; \
101 a->arg = memory; \
102 } \
103 while (a->count <= n) \
104 a->arg[a->count++].type = TYPE_NONE; \
105 if (a->arg[n].type == TYPE_NONE) \
106 a->arg[n].type = (_type_); \
107 else if (a->arg[n].type != (_type_)) \
108 /* Ambiguous type for positional argument. */ \
109 goto error; \
110 }
111
112 while (*cp != '\0')
113 {
114 CHAR_T c = *cp++;
115 if (c == '%')
116 {
117 size_t arg_index = ARG_NONE;
118 DIRECTIVE *dp = &d->dir[d->count];/* pointer to next directive */
119
120 /* Initialize the next directive. */
121 dp->dir_start = cp - 1;
122 dp->flags = 0;
123 dp->width_start = NULL;
124 dp->width_end = NULL;
125 dp->width_arg_index = ARG_NONE;
126 dp->precision_start = NULL;
127 dp->precision_end = NULL;
128 dp->precision_arg_index = ARG_NONE;
129 dp->arg_index = ARG_NONE;
130
131 /* Test for positional argument. */
132 if (*cp >= '0' && *cp <= '9')
133 {
134 const CHAR_T *np;
135
136 for (np = cp; *np >= '0' && *np <= '9'; np++)
137 ;
138 if (*np == '$')
139 {
140 size_t n = 0;
141
142 for (np = cp; *np >= '0' && *np <= '9'; np++)
143 n = xsum (xtimes (n, 10), *np - '0');
144 if (n == 0)
145 /* Positional argument 0. */
146 goto error;
147 if (size_overflow_p (n))
148 /* n too large, would lead to out of memory later. */
149 goto error;
150 arg_index = n - 1;
151 cp = np + 1;
152 }
153 }
154
155 /* Read the flags. */
156 for (;;)
157 {
158 if (*cp == '\'')
159 {
160 dp->flags |= FLAG_GROUP;
161 cp++;
162 }
163 else if (*cp == '-')
164 {
165 dp->flags |= FLAG_LEFT;
166 cp++;
167 }
168 else if (*cp == '+')
169 {
170 dp->flags |= FLAG_SHOWSIGN;
171 cp++;
172 }
173 else if (*cp == ' ')
174 {
175 dp->flags |= FLAG_SPACE;
176 cp++;
177 }
178 else if (*cp == '#')
179 {
180 dp->flags |= FLAG_ALT;
181 cp++;
182 }
183 else if (*cp == '0')
184 {
185 dp->flags |= FLAG_ZERO;
186 cp++;
187 }
188 else
189 break;
190 }
191
192 /* Parse the field width. */
193 if (*cp == '*')
194 {
195 dp->width_start = cp;
196 cp++;
197 dp->width_end = cp;
198 if (max_width_length < 1)
199 max_width_length = 1;
200
201 /* Test for positional argument. */
202 if (*cp >= '0' && *cp <= '9')
203 {
204 const CHAR_T *np;
205
206 for (np = cp; *np >= '0' && *np <= '9'; np++)
207 ;
208 if (*np == '$')
209 {
210 size_t n = 0;
211
212 for (np = cp; *np >= '0' && *np <= '9'; np++)
213 n = xsum (xtimes (n, 10), *np - '0');
214 if (n == 0)
215 /* Positional argument 0. */
216 goto error;
217 if (size_overflow_p (n))
218 /* n too large, would lead to out of memory later. */
219 goto error;
220 dp->width_arg_index = n - 1;
221 cp = np + 1;
222 }
223 }
224 if (dp->width_arg_index == ARG_NONE)
225 {
226 dp->width_arg_index = arg_posn++;
227 if (dp->width_arg_index == ARG_NONE)
228 /* arg_posn wrapped around. */
229 goto error;
230 }
231 REGISTER_ARG (dp->width_arg_index, TYPE_INT);
232 }
233 else if (*cp >= '0' && *cp <= '9')
234 {
235 size_t width_length;
236
237 dp->width_start = cp;
238 for (; *cp >= '0' && *cp <= '9'; cp++)
239 ;
240 dp->width_end = cp;
241 width_length = dp->width_end - dp->width_start;
242 if (max_width_length < width_length)
243 max_width_length = width_length;
244 }
245
246 /* Parse the precision. */
247 if (*cp == '.')
248 {
249 cp++;
250 if (*cp == '*')
251 {
252 dp->precision_start = cp - 1;
253 cp++;
254 dp->precision_end = cp;
255 if (max_precision_length < 2)
256 max_precision_length = 2;
257
258 /* Test for positional argument. */
259 if (*cp >= '0' && *cp <= '9')
260 {
261 const CHAR_T *np;
262
263 for (np = cp; *np >= '0' && *np <= '9'; np++)
264 ;
265 if (*np == '$')
266 {
267 size_t n = 0;
268
269 for (np = cp; *np >= '0' && *np <= '9'; np++)
270 n = xsum (xtimes (n, 10), *np - '0');
271 if (n == 0)
272 /* Positional argument 0. */
273 goto error;
274 if (size_overflow_p (n))
275 /* n too large, would lead to out of memory
276 later. */
277 goto error;
278 dp->precision_arg_index = n - 1;
279 cp = np + 1;
280 }
281 }
282 if (dp->precision_arg_index == ARG_NONE)
283 {
284 dp->precision_arg_index = arg_posn++;
285 if (dp->precision_arg_index == ARG_NONE)
286 /* arg_posn wrapped around. */
287 goto error;
288 }
289 REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
290 }
291 else
292 {
293 size_t precision_length;
294
295 dp->precision_start = cp - 1;
296 for (; *cp >= '0' && *cp <= '9'; cp++)
297 ;
298 dp->precision_end = cp;
299 precision_length = dp->precision_end - dp->precision_start;
300 if (max_precision_length < precision_length)
301 max_precision_length = precision_length;
302 }
303 }
304
305 {
306 arg_type type;
307
308 /* Parse argument type/size specifiers. */
309 {
310 int flags = 0;
311
312 for (;;)
313 {
314 if (*cp == 'h')
315 {
316 flags |= (1 << (flags & 1));
317 cp++;
318 }
319 else if (*cp == 'L')
320 {
321 flags |= 4;
322 cp++;
323 }
324 else if (*cp == 'l')
325 {
326 flags += 8;
327 cp++;
328 }
329#ifdef HAVE_INTMAX_T
330 else if (*cp == 'j')
331 {
332 if (sizeof (intmax_t) > sizeof (long))
333 {
334 /* intmax_t = long long */
335 flags += 16;
336 }
337 else if (sizeof (intmax_t) > sizeof (int))
338 {
339 /* intmax_t = long */
340 flags += 8;
341 }
342 cp++;
343 }
344#endif
345 else if (*cp == 'z' || *cp == 'Z')
346 {
347 /* 'z' is standardized in ISO C 99, but glibc uses 'Z'
348 because the warning facility in gcc-2.95.2 understands
349 only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
350 if (sizeof (size_t) > sizeof (long))
351 {
352 /* size_t = long long */
353 flags += 16;
354 }
355 else if (sizeof (size_t) > sizeof (int))
356 {
357 /* size_t = long */
358 flags += 8;
359 }
360 cp++;
361 }
362 else if (*cp == 't')
363 {
364 if (sizeof (ptrdiff_t) > sizeof (long))
365 {
366 /* ptrdiff_t = long long */
367 flags += 16;
368 }
369 else if (sizeof (ptrdiff_t) > sizeof (int))
370 {
371 /* ptrdiff_t = long */
372 flags += 8;
373 }
374 cp++;
375 }
376 else
377 break;
378 }
379
380 /* Read the conversion character. */
381 c = *cp++;
382 switch (c)
383 {
384 case 'd': case 'i':
385#ifdef HAVE_LONG_LONG_INT
386 /* If 'long long' exists and is larger than 'long': */
387 if (flags >= 16 || (flags & 4))
388 type = TYPE_LONGLONGINT;
389 else
390#endif
391 /* If 'long long' exists and is the same as 'long', we parse
392 "lld" into TYPE_LONGINT. */
393 if (flags >= 8)
394 type = TYPE_LONGINT;
395 else if (flags & 2)
396 type = TYPE_SCHAR;
397 else if (flags & 1)
398 type = TYPE_SHORT;
399 else
400 type = TYPE_INT;
401 break;
402 case 'o': case 'u': case 'x': case 'X':
403#ifdef HAVE_LONG_LONG_INT
404 /* If 'long long' exists and is larger than 'long': */
405 if (flags >= 16 || (flags & 4))
406 type = TYPE_ULONGLONGINT;
407 else
408#endif
409 /* If 'unsigned long long' exists and is the same as
410 'unsigned long', we parse "llu" into TYPE_ULONGINT. */
411 if (flags >= 8)
412 type = TYPE_ULONGINT;
413 else if (flags & 2)
414 type = TYPE_UCHAR;
415 else if (flags & 1)
416 type = TYPE_USHORT;
417 else
418 type = TYPE_UINT;
419 break;
420 case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
421 case 'a': case 'A':
422#ifdef HAVE_LONG_DOUBLE
423 if (flags >= 16 || (flags & 4))
424 type = TYPE_LONGDOUBLE;
425 else
426#endif
427 type = TYPE_DOUBLE;
428 break;
429 case 'c':
430 if (flags >= 8)
431#ifdef HAVE_WINT_T
432 type = TYPE_WIDE_CHAR;
433#else
434 goto error;
435#endif
436 else
437 type = TYPE_CHAR;
438 break;
439#ifdef HAVE_WINT_T
440 case 'C':
441 type = TYPE_WIDE_CHAR;
442 c = 'c';
443 break;
444#endif
445 case 's':
446 if (flags >= 8)
447#ifdef HAVE_WCHAR_T
448 type = TYPE_WIDE_STRING;
449#else
450 goto error;
451#endif
452 else
453 type = TYPE_STRING;
454 break;
455#ifdef HAVE_WCHAR_T
456 case 'S':
457 type = TYPE_WIDE_STRING;
458 c = 's';
459 break;
460#endif
461 case 'p':
462 type = TYPE_POINTER;
463 break;
464 case 'n':
465#ifdef HAVE_LONG_LONG_INT
466 /* If 'long long' exists and is larger than 'long': */
467 if (flags >= 16 || (flags & 4))
468 type = TYPE_COUNT_LONGLONGINT_POINTER;
469 else
470#endif
471 /* If 'long long' exists and is the same as 'long', we parse
472 "lln" into TYPE_COUNT_LONGINT_POINTER. */
473 if (flags >= 8)
474 type = TYPE_COUNT_LONGINT_POINTER;
475 else if (flags & 2)
476 type = TYPE_COUNT_SCHAR_POINTER;
477 else if (flags & 1)
478 type = TYPE_COUNT_SHORT_POINTER;
479 else
480 type = TYPE_COUNT_INT_POINTER;
481 break;
482 case '%':
483 type = TYPE_NONE;
484 break;
485 default:
486 /* Unknown conversion character. */
487 goto error;
488 }
489 }
490
491 if (type != TYPE_NONE)
492 {
493 dp->arg_index = arg_index;
494 if (dp->arg_index == ARG_NONE)
495 {
496 dp->arg_index = arg_posn++;
497 if (dp->arg_index == ARG_NONE)
498 /* arg_posn wrapped around. */
499 goto error;
500 }
501 REGISTER_ARG (dp->arg_index, type);
502 }
503 dp->conversion = c;
504 dp->dir_end = cp;
505 }
506
507 d->count++;
508 if (d->count >= d_allocated)
509 {
510 size_t memory_size;
511 DIRECTIVE *memory;
512
513 d_allocated = xtimes (d_allocated, 2);
514 memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
515 if (size_overflow_p (memory_size))
516 /* Overflow, would lead to out of memory. */
517 goto error;
518 memory = (DIRECTIVE *) realloc (d->dir, memory_size);
519 if (memory == NULL)
520 /* Out of memory. */
521 goto error;
522 d->dir = memory;
523 }
524 }
525 }
526 d->dir[d->count].dir_start = cp;
527
528 d->max_width_length = max_width_length;
529 d->max_precision_length = max_precision_length;
530 return 0;
531
532error:
533 if (a->arg)
534 free (a->arg);
535 if (d->dir)
536 free (d->dir);
537 return -1;
538}
539
540#undef DIRECTIVES
541#undef DIRECTIVE
542#undef CHAR_T
543#undef PRINTF_PARSE
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