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Revision 2 - (show annotations) (download)
Fri Oct 28 21:19:04 2011 UTC (8 years, 2 months ago) by zoff99
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1 /* Formatted output to strings.
2 Copyright (C) 1999-2000, 2002-2003 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Library General Public License as published
6 by 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 GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
17 USA. */
18
19 #ifdef HAVE_CONFIG_H
20 # include <config.h>
21 #endif
22
23 /* Specification. */
24 #if WIDE_CHAR_VERSION
25 # include "wprintf-parse.h"
26 #else
27 # include "printf-parse.h"
28 #endif
29
30 /* Get size_t, NULL. */
31 #include <stddef.h>
32
33 /* Get intmax_t. */
34 #if HAVE_STDINT_H_WITH_UINTMAX
35 # include <stdint.h>
36 #endif
37 #if HAVE_INTTYPES_H_WITH_UINTMAX
38 # include <inttypes.h>
39 #endif
40
41 /* malloc(), realloc(), free(). */
42 #include <stdlib.h>
43
44 /* Checked size_t computations. */
45 #include "xsize.h"
46
47 #if WIDE_CHAR_VERSION
48 # define PRINTF_PARSE wprintf_parse
49 # define CHAR_T wchar_t
50 # define DIRECTIVE wchar_t_directive
51 # define DIRECTIVES wchar_t_directives
52 #else
53 # define PRINTF_PARSE printf_parse
54 # define CHAR_T char
55 # define DIRECTIVE char_directive
56 # define DIRECTIVES char_directives
57 #endif
58
59 #ifdef STATIC
60 STATIC
61 #endif
62 int
63 PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
64 {
65 const CHAR_T *cp = format; /* pointer into format */
66 size_t arg_posn = 0; /* number of regular arguments consumed */
67 size_t d_allocated; /* allocated elements of d->dir */
68 size_t a_allocated; /* allocated elements of a->arg */
69 size_t max_width_length = 0;
70 size_t max_precision_length = 0;
71
72 d->count = 0;
73 d_allocated = 1;
74 d->dir = malloc (d_allocated * sizeof (DIRECTIVE));
75 if (d->dir == NULL)
76 /* Out of memory. */
77 return -1;
78
79 a->count = 0;
80 a_allocated = 0;
81 a->arg = NULL;
82
83 #define REGISTER_ARG(_index_,_type_) \
84 { \
85 size_t n = (_index_); \
86 if (n >= a_allocated) \
87 { \
88 size_t memory_size; \
89 argument *memory; \
90 \
91 a_allocated = xtimes (a_allocated, 2); \
92 if (a_allocated <= n) \
93 a_allocated = xsum (n, 1); \
94 memory_size = xtimes (a_allocated, sizeof (argument)); \
95 if (size_overflow_p (memory_size)) \
96 /* Overflow, would lead to out of memory. */ \
97 goto error; \
98 memory = (a->arg \
99 ? realloc (a->arg, memory_size) \
100 : malloc (memory_size)); \
101 if (memory == NULL) \
102 /* Out of memory. */ \
103 goto error; \
104 a->arg = memory; \
105 } \
106 while (a->count <= n) \
107 a->arg[a->count++].type = TYPE_NONE; \
108 if (a->arg[n].type == TYPE_NONE) \
109 a->arg[n].type = (_type_); \
110 else if (a->arg[n].type != (_type_)) \
111 /* Ambiguous type for positional argument. */ \
112 goto error; \
113 }
114
115 while (*cp != '\0')
116 {
117 CHAR_T c = *cp++;
118 if (c == '%')
119 {
120 size_t arg_index = ARG_NONE;
121 DIRECTIVE *dp = &d->dir[d->count];/* pointer to next directive */
122
123 /* Initialize the next directive. */
124 dp->dir_start = cp - 1;
125 dp->flags = 0;
126 dp->width_start = NULL;
127 dp->width_end = NULL;
128 dp->width_arg_index = ARG_NONE;
129 dp->precision_start = NULL;
130 dp->precision_end = NULL;
131 dp->precision_arg_index = ARG_NONE;
132 dp->arg_index = ARG_NONE;
133
134 /* Test for positional argument. */
135 if (*cp >= '0' && *cp <= '9')
136 {
137 const CHAR_T *np;
138
139 for (np = cp; *np >= '0' && *np <= '9'; np++)
140 ;
141 if (*np == '$')
142 {
143 size_t n = 0;
144
145 for (np = cp; *np >= '0' && *np <= '9'; np++)
146 n = xsum (xtimes (n, 10), *np - '0');
147 if (n == 0)
148 /* Positional argument 0. */
149 goto error;
150 if (size_overflow_p (n))
151 /* n too large, would lead to out of memory later. */
152 goto error;
153 arg_index = n - 1;
154 cp = np + 1;
155 }
156 }
157
158 /* Read the flags. */
159 for (;;)
160 {
161 if (*cp == '\'')
162 {
163 dp->flags |= FLAG_GROUP;
164 cp++;
165 }
166 else if (*cp == '-')
167 {
168 dp->flags |= FLAG_LEFT;
169 cp++;
170 }
171 else if (*cp == '+')
172 {
173 dp->flags |= FLAG_SHOWSIGN;
174 cp++;
175 }
176 else if (*cp == ' ')
177 {
178 dp->flags |= FLAG_SPACE;
179 cp++;
180 }
181 else if (*cp == '#')
182 {
183 dp->flags |= FLAG_ALT;
184 cp++;
185 }
186 else if (*cp == '0')
187 {
188 dp->flags |= FLAG_ZERO;
189 cp++;
190 }
191 else
192 break;
193 }
194
195 /* Parse the field width. */
196 if (*cp == '*')
197 {
198 dp->width_start = cp;
199 cp++;
200 dp->width_end = cp;
201 if (max_width_length < 1)
202 max_width_length = 1;
203
204 /* Test for positional argument. */
205 if (*cp >= '0' && *cp <= '9')
206 {
207 const CHAR_T *np;
208
209 for (np = cp; *np >= '0' && *np <= '9'; np++)
210 ;
211 if (*np == '$')
212 {
213 size_t n = 0;
214
215 for (np = cp; *np >= '0' && *np <= '9'; np++)
216 n = xsum (xtimes (n, 10), *np - '0');
217 if (n == 0)
218 /* Positional argument 0. */
219 goto error;
220 if (size_overflow_p (n))
221 /* n too large, would lead to out of memory later. */
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 n = xsum (xtimes (n, 10), *np - '0');
274 if (n == 0)
275 /* Positional argument 0. */
276 goto error;
277 if (size_overflow_p (n))
278 /* n too large, would lead to out of memory
279 later. */
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 size_t memory_size;
505 DIRECTIVE *memory;
506
507 d_allocated = xtimes (d_allocated, 2);
508 memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
509 if (size_overflow_p (memory_size))
510 /* Overflow, would lead to out of memory. */
511 goto error;
512 memory = realloc (d->dir, memory_size);
513 if (memory == NULL)
514 /* Out of memory. */
515 goto error;
516 d->dir = memory;
517 }
518 }
519 }
520 d->dir[d->count].dir_start = cp;
521
522 d->max_width_length = max_width_length;
523 d->max_precision_length = max_precision_length;
524 return 0;
525
526 error:
527 if (a->arg)
528 free (a->arg);
529 if (d->dir)
530 free (d->dir);
531 return -1;
532 }
533
534 #undef DIRECTIVES
535 #undef DIRECTIVE
536 #undef CHAR_T
537 #undef PRINTF_PARSE

   
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