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[chaz/tar] / lib / printf-parse.c
1 /* Formatted output to strings.
2 Copyright (C) 1999-2000, 2002-2004, 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 #ifndef SIZE_MAX
42 # define SIZE_MAX ((size_t) -1)
43 #endif
44
45 #if WIDE_CHAR_VERSION
46 # define PRINTF_PARSE wprintf_parse
47 # define CHAR_T wchar_t
48 # define DIRECTIVE wchar_t_directive
49 # define DIRECTIVES wchar_t_directives
50 #else
51 # define PRINTF_PARSE printf_parse
52 # define CHAR_T char
53 # define DIRECTIVE char_directive
54 # define DIRECTIVES char_directives
55 #endif
56
57 #ifdef STATIC
58 STATIC
59 #endif
60 int
61 PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
62 {
63 const CHAR_T *cp = format; /* pointer into format */
64 size_t arg_posn = 0; /* number of regular arguments consumed */
65 size_t d_allocated; /* allocated elements of d->dir */
66 size_t a_allocated; /* allocated elements of a->arg */
67 size_t max_width_length = 0;
68 size_t max_precision_length = 0;
69
70 d->count = 0;
71 d_allocated = 1;
72 d->dir = malloc (d_allocated * sizeof (DIRECTIVE));
73 if (d->dir == NULL)
74 /* Out of memory. */
75 return -1;
76
77 a->count = 0;
78 a_allocated = 0;
79 a->arg = NULL;
80
81 #define REGISTER_ARG(_index_,_type_) \
82 { \
83 size_t n = (_index_); \
84 if (n >= a_allocated) \
85 { \
86 size_t memory_size; \
87 argument *memory; \
88 \
89 a_allocated *= 2; \
90 if (a_allocated <= n) \
91 a_allocated = n + 1; \
92 if (SIZE_MAX / sizeof (argument) < a_allocated) \
93 /* Overflow, would lead to out of memory. */ \
94 goto error; \
95 memory_size = a_allocated * sizeof (argument); \
96 memory = (a->arg \
97 ? realloc (a->arg, memory_size) \
98 : malloc (memory_size)); \
99 if (memory == NULL) \
100 /* Out of memory. */ \
101 goto error; \
102 a->arg = memory; \
103 } \
104 while (a->count <= n) \
105 a->arg[a->count++].type = TYPE_NONE; \
106 if (a->arg[n].type == TYPE_NONE) \
107 a->arg[n].type = (_type_); \
108 else if (a->arg[n].type != (_type_)) \
109 /* Ambiguous type for positional argument. */ \
110 goto error; \
111 }
112
113 while (*cp != '\0')
114 {
115 CHAR_T c = *cp++;
116 if (c == '%')
117 {
118 size_t arg_index = ARG_NONE;
119 DIRECTIVE *dp = &d->dir[d->count];/* pointer to next directive */
120
121 /* Initialize the next directive. */
122 dp->dir_start = cp - 1;
123 dp->flags = 0;
124 dp->width_start = NULL;
125 dp->width_end = NULL;
126 dp->width_arg_index = ARG_NONE;
127 dp->precision_start = NULL;
128 dp->precision_end = NULL;
129 dp->precision_arg_index = ARG_NONE;
130 dp->arg_index = ARG_NONE;
131
132 /* Test for positional argument. */
133 if (*cp >= '0' && *cp <= '9')
134 {
135 const CHAR_T *np;
136
137 for (np = cp; *np >= '0' && *np <= '9'; np++)
138 ;
139 if (*np == '$')
140 {
141 size_t n = 0;
142
143 for (np = cp; *np >= '0' && *np <= '9'; np++)
144 if (n < SIZE_MAX / 10)
145 n = 10 * n + (*np - '0');
146 else
147 /* n too large for memory. */
148 goto error;
149 if (n == 0)
150 /* Positional argument 0. */
151 goto error;
152 arg_index = n - 1;
153 cp = np + 1;
154 }
155 }
156
157 /* Read the flags. */
158 for (;;)
159 {
160 if (*cp == '\'')
161 {
162 dp->flags |= FLAG_GROUP;
163 cp++;
164 }
165 else if (*cp == '-')
166 {
167 dp->flags |= FLAG_LEFT;
168 cp++;
169 }
170 else if (*cp == '+')
171 {
172 dp->flags |= FLAG_SHOWSIGN;
173 cp++;
174 }
175 else if (*cp == ' ')
176 {
177 dp->flags |= FLAG_SPACE;
178 cp++;
179 }
180 else if (*cp == '#')
181 {
182 dp->flags |= FLAG_ALT;
183 cp++;
184 }
185 else if (*cp == '0')
186 {
187 dp->flags |= FLAG_ZERO;
188 cp++;
189 }
190 else
191 break;
192 }
193
194 /* Parse the field width. */
195 if (*cp == '*')
196 {
197 dp->width_start = cp;
198 cp++;
199 dp->width_end = cp;
200 if (max_width_length < 1)
201 max_width_length = 1;
202
203 /* Test for positional argument. */
204 if (*cp >= '0' && *cp <= '9')
205 {
206 const CHAR_T *np;
207
208 for (np = cp; *np >= '0' && *np <= '9'; np++)
209 ;
210 if (*np == '$')
211 {
212 size_t n = 0;
213
214 for (np = cp; *np >= '0' && *np <= '9'; np++)
215 if (n < SIZE_MAX / 10)
216 n = 10 * n + (*np - '0');
217 else
218 /* n too large for memory. */
219 goto error;
220 if (n == 0)
221 /* Positional argument 0. */
222 goto error;
223 dp->width_arg_index = n - 1;
224 cp = np + 1;
225 }
226 }
227 if (dp->width_arg_index == ARG_NONE)
228 {
229 dp->width_arg_index = arg_posn++;
230 if (dp->width_arg_index == ARG_NONE)
231 /* arg_posn wrapped around. */
232 goto error;
233 }
234 REGISTER_ARG (dp->width_arg_index, TYPE_INT);
235 }
236 else if (*cp >= '0' && *cp <= '9')
237 {
238 size_t width_length;
239
240 dp->width_start = cp;
241 for (; *cp >= '0' && *cp <= '9'; cp++)
242 ;
243 dp->width_end = cp;
244 width_length = dp->width_end - dp->width_start;
245 if (max_width_length < width_length)
246 max_width_length = width_length;
247 }
248
249 /* Parse the precision. */
250 if (*cp == '.')
251 {
252 cp++;
253 if (*cp == '*')
254 {
255 dp->precision_start = cp - 1;
256 cp++;
257 dp->precision_end = cp;
258 if (max_precision_length < 2)
259 max_precision_length = 2;
260
261 /* Test for positional argument. */
262 if (*cp >= '0' && *cp <= '9')
263 {
264 const CHAR_T *np;
265
266 for (np = cp; *np >= '0' && *np <= '9'; np++)
267 ;
268 if (*np == '$')
269 {
270 size_t n = 0;
271
272 for (np = cp; *np >= '0' && *np <= '9'; np++)
273 if (n < SIZE_MAX / 10)
274 n = 10 * n + (*np - '0');
275 else
276 /* n too large for memory. */
277 goto error;
278 if (n == 0)
279 /* Positional argument 0. */
280 goto error;
281 dp->precision_arg_index = n - 1;
282 cp = np + 1;
283 }
284 }
285 if (dp->precision_arg_index == ARG_NONE)
286 {
287 dp->precision_arg_index = arg_posn++;
288 if (dp->precision_arg_index == ARG_NONE)
289 /* arg_posn wrapped around. */
290 goto error;
291 }
292 REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
293 }
294 else
295 {
296 size_t precision_length;
297
298 dp->precision_start = cp - 1;
299 for (; *cp >= '0' && *cp <= '9'; cp++)
300 ;
301 dp->precision_end = cp;
302 precision_length = dp->precision_end - dp->precision_start;
303 if (max_precision_length < precision_length)
304 max_precision_length = precision_length;
305 }
306 }
307
308 {
309 arg_type type;
310
311 /* Parse argument type/size specifiers. */
312 {
313 int flags = 0;
314
315 for (;;)
316 {
317 if (*cp == 'h')
318 {
319 flags |= (1 << (flags & 1));
320 cp++;
321 }
322 else if (*cp == 'L')
323 {
324 flags |= 4;
325 cp++;
326 }
327 else if (*cp == 'l')
328 {
329 flags += 8;
330 cp++;
331 }
332 #ifdef HAVE_INTMAX_T
333 else if (*cp == 'j')
334 {
335 if (sizeof (intmax_t) > sizeof (long))
336 {
337 /* intmax_t = long long */
338 flags += 16;
339 }
340 else if (sizeof (intmax_t) > sizeof (int))
341 {
342 /* intmax_t = long */
343 flags += 8;
344 }
345 cp++;
346 }
347 #endif
348 else if (*cp == 'z' || *cp == 'Z')
349 {
350 /* 'z' is standardized in ISO C 99, but glibc uses 'Z'
351 because the warning facility in gcc-2.95.2 understands
352 only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
353 if (sizeof (size_t) > sizeof (long))
354 {
355 /* size_t = long long */
356 flags += 16;
357 }
358 else if (sizeof (size_t) > sizeof (int))
359 {
360 /* size_t = long */
361 flags += 8;
362 }
363 cp++;
364 }
365 else if (*cp == 't')
366 {
367 if (sizeof (ptrdiff_t) > sizeof (long))
368 {
369 /* ptrdiff_t = long long */
370 flags += 16;
371 }
372 else if (sizeof (ptrdiff_t) > sizeof (int))
373 {
374 /* ptrdiff_t = long */
375 flags += 8;
376 }
377 cp++;
378 }
379 else
380 break;
381 }
382
383 /* Read the conversion character. */
384 c = *cp++;
385 switch (c)
386 {
387 case 'd': case 'i':
388 #ifdef HAVE_LONG_LONG
389 if (flags >= 16 || (flags & 4))
390 type = TYPE_LONGLONGINT;
391 else
392 #endif
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
404 if (flags >= 16 || (flags & 4))
405 type = TYPE_ULONGLONGINT;
406 else
407 #endif
408 if (flags >= 8)
409 type = TYPE_ULONGINT;
410 else if (flags & 2)
411 type = TYPE_UCHAR;
412 else if (flags & 1)
413 type = TYPE_USHORT;
414 else
415 type = TYPE_UINT;
416 break;
417 case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
418 case 'a': case 'A':
419 #ifdef HAVE_LONG_DOUBLE
420 if (flags >= 16 || (flags & 4))
421 type = TYPE_LONGDOUBLE;
422 else
423 #endif
424 type = TYPE_DOUBLE;
425 break;
426 case 'c':
427 if (flags >= 8)
428 #ifdef HAVE_WINT_T
429 type = TYPE_WIDE_CHAR;
430 #else
431 goto error;
432 #endif
433 else
434 type = TYPE_CHAR;
435 break;
436 #ifdef HAVE_WINT_T
437 case 'C':
438 type = TYPE_WIDE_CHAR;
439 c = 'c';
440 break;
441 #endif
442 case 's':
443 if (flags >= 8)
444 #ifdef HAVE_WCHAR_T
445 type = TYPE_WIDE_STRING;
446 #else
447 goto error;
448 #endif
449 else
450 type = TYPE_STRING;
451 break;
452 #ifdef HAVE_WCHAR_T
453 case 'S':
454 type = TYPE_WIDE_STRING;
455 c = 's';
456 break;
457 #endif
458 case 'p':
459 type = TYPE_POINTER;
460 break;
461 case 'n':
462 #ifdef HAVE_LONG_LONG
463 if (flags >= 16 || (flags & 4))
464 type = TYPE_COUNT_LONGLONGINT_POINTER;
465 else
466 #endif
467 if (flags >= 8)
468 type = TYPE_COUNT_LONGINT_POINTER;
469 else if (flags & 2)
470 type = TYPE_COUNT_SCHAR_POINTER;
471 else if (flags & 1)
472 type = TYPE_COUNT_SHORT_POINTER;
473 else
474 type = TYPE_COUNT_INT_POINTER;
475 break;
476 case '%':
477 type = TYPE_NONE;
478 break;
479 default:
480 /* Unknown conversion character. */
481 goto error;
482 }
483 }
484
485 if (type != TYPE_NONE)
486 {
487 dp->arg_index = arg_index;
488 if (dp->arg_index == ARG_NONE)
489 {
490 dp->arg_index = arg_posn++;
491 if (dp->arg_index == ARG_NONE)
492 /* arg_posn wrapped around. */
493 goto error;
494 }
495 REGISTER_ARG (dp->arg_index, type);
496 }
497 dp->conversion = c;
498 dp->dir_end = cp;
499 }
500
501 d->count++;
502 if (d->count >= d_allocated)
503 {
504 DIRECTIVE *memory;
505
506 if (SIZE_MAX / (2 * sizeof (DIRECTIVE)) < d_allocated)
507 /* Overflow, would lead to out of memory. */
508 goto error;
509 d_allocated *= 2;
510 memory = realloc (d->dir, d_allocated * sizeof (DIRECTIVE));
511 if (memory == NULL)
512 /* Out of memory. */
513 goto error;
514 d->dir = memory;
515 }
516 }
517 }
518 d->dir[d->count].dir_start = cp;
519
520 d->max_width_length = max_width_length;
521 d->max_precision_length = max_precision_length;
522 return 0;
523
524 error:
525 if (a->arg)
526 free (a->arg);
527 if (d->dir)
528 free (d->dir);
529 return -1;
530 }
531
532 #undef DIRECTIVES
533 #undef DIRECTIVE
534 #undef CHAR_T
535 #undef PRINTF_PARSE
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