1 /* Formatted output to strings.
2 Copyright (C) 1999-2000, 2002-2003, 2006-2008 Free Software Foundation, Inc.
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)
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.
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. */
18 /* This file can be parametrized with the following macros:
19 CHAR_T The element type of the format string.
20 CHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters
21 in the format string are ASCII.
22 DIRECTIVE Structure denoting a format directive.
24 DIRECTIVES Structure denoting the set of format directives of a
25 format string. Depends on CHAR_T.
26 PRINTF_PARSE Function that parses a format string.
28 STATIC Set to 'static' to declare the function static.
29 ENABLE_UNISTDIO Set to 1 to enable the unistdio extensions. */
37 # include "printf-parse.h"
40 /* Default parameters. */
42 # define PRINTF_PARSE printf_parse
44 # define DIRECTIVE char_directive
45 # define DIRECTIVES char_directives
48 /* Get size_t, NULL. */
52 #if defined IN_LIBINTL || defined IN_LIBASPRINTF
53 # if HAVE_STDINT_H_WITH_UINTMAX
56 # if HAVE_INTTYPES_H_WITH_UINTMAX
57 # include <inttypes.h>
63 /* malloc(), realloc(), free(). */
69 /* Checked size_t computations. */
81 PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
83 const CHAR_T *cp = format; /* pointer into format */
84 size_t arg_posn = 0; /* number of regular arguments consumed */
85 size_t d_allocated; /* allocated elements of d->dir */
86 size_t a_allocated; /* allocated elements of a->arg */
87 size_t max_width_length = 0;
88 size_t max_precision_length = 0;
92 d->dir = (DIRECTIVE *) malloc (d_allocated * sizeof (DIRECTIVE));
101 #define REGISTER_ARG(_index_,_type_) \
103 size_t n = (_index_); \
104 if (n >= a_allocated) \
106 size_t memory_size; \
109 a_allocated = xtimes (a_allocated, 2); \
110 if (a_allocated <= n) \
111 a_allocated = xsum (n, 1); \
112 memory_size = xtimes (a_allocated, sizeof (argument)); \
113 if (size_overflow_p (memory_size)) \
114 /* Overflow, would lead to out of memory. */ \
115 goto out_of_memory; \
116 memory = (argument *) (a->arg \
117 ? realloc (a->arg, memory_size) \
118 : malloc (memory_size)); \
119 if (memory == NULL) \
120 /* Out of memory. */ \
121 goto out_of_memory; \
124 while (a->count <= n) \
125 a->arg[a->count++].type = TYPE_NONE; \
126 if (a->arg[n].type == TYPE_NONE) \
127 a->arg[n].type = (_type_); \
128 else if (a->arg[n].type != (_type_)) \
129 /* Ambiguous type for positional argument. */ \
138 size_t arg_index = ARG_NONE;
139 DIRECTIVE *dp = &d->dir[d->count]; /* pointer to next directive */
141 /* Initialize the next directive. */
142 dp->dir_start = cp - 1;
144 dp->width_start = NULL;
145 dp->width_end = NULL;
146 dp->width_arg_index = ARG_NONE;
147 dp->precision_start = NULL;
148 dp->precision_end = NULL;
149 dp->precision_arg_index = ARG_NONE;
150 dp->arg_index = ARG_NONE;
152 /* Test for positional argument. */
153 if (*cp >= '0' && *cp <= '9')
157 for (np = cp; *np >= '0' && *np <= '9'; np++)
163 for (np = cp; *np >= '0' && *np <= '9'; np++)
164 n = xsum (xtimes (n, 10), *np - '0');
166 /* Positional argument 0. */
168 if (size_overflow_p (n))
169 /* n too large, would lead to out of memory later. */
176 /* Read the flags. */
181 dp->flags |= FLAG_GROUP;
186 dp->flags |= FLAG_LEFT;
191 dp->flags |= FLAG_SHOWSIGN;
196 dp->flags |= FLAG_SPACE;
201 dp->flags |= FLAG_ALT;
206 dp->flags |= FLAG_ZERO;
213 /* Parse the field width. */
216 dp->width_start = cp;
219 if (max_width_length < 1)
220 max_width_length = 1;
222 /* Test for positional argument. */
223 if (*cp >= '0' && *cp <= '9')
227 for (np = cp; *np >= '0' && *np <= '9'; np++)
233 for (np = cp; *np >= '0' && *np <= '9'; np++)
234 n = xsum (xtimes (n, 10), *np - '0');
236 /* Positional argument 0. */
238 if (size_overflow_p (n))
239 /* n too large, would lead to out of memory later. */
241 dp->width_arg_index = n - 1;
245 if (dp->width_arg_index == ARG_NONE)
247 dp->width_arg_index = arg_posn++;
248 if (dp->width_arg_index == ARG_NONE)
249 /* arg_posn wrapped around. */
252 REGISTER_ARG (dp->width_arg_index, TYPE_INT);
254 else if (*cp >= '0' && *cp <= '9')
258 dp->width_start = cp;
259 for (; *cp >= '0' && *cp <= '9'; cp++)
262 width_length = dp->width_end - dp->width_start;
263 if (max_width_length < width_length)
264 max_width_length = width_length;
267 /* Parse the precision. */
273 dp->precision_start = cp - 1;
275 dp->precision_end = cp;
276 if (max_precision_length < 2)
277 max_precision_length = 2;
279 /* Test for positional argument. */
280 if (*cp >= '0' && *cp <= '9')
284 for (np = cp; *np >= '0' && *np <= '9'; np++)
290 for (np = cp; *np >= '0' && *np <= '9'; np++)
291 n = xsum (xtimes (n, 10), *np - '0');
293 /* Positional argument 0. */
295 if (size_overflow_p (n))
296 /* n too large, would lead to out of memory
299 dp->precision_arg_index = n - 1;
303 if (dp->precision_arg_index == ARG_NONE)
305 dp->precision_arg_index = arg_posn++;
306 if (dp->precision_arg_index == ARG_NONE)
307 /* arg_posn wrapped around. */
310 REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
314 size_t precision_length;
316 dp->precision_start = cp - 1;
317 for (; *cp >= '0' && *cp <= '9'; cp++)
319 dp->precision_end = cp;
320 precision_length = dp->precision_end - dp->precision_start;
321 if (max_precision_length < precision_length)
322 max_precision_length = precision_length;
329 /* Parse argument type/size specifiers. */
337 flags |= (1 << (flags & 1));
352 if (sizeof (intmax_t) > sizeof (long))
354 /* intmax_t = long long */
357 else if (sizeof (intmax_t) > sizeof (int))
359 /* intmax_t = long */
364 else if (*cp == 'z' || *cp == 'Z')
366 /* 'z' is standardized in ISO C 99, but glibc uses 'Z'
367 because the warning facility in gcc-2.95.2 understands
368 only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
369 if (sizeof (size_t) > sizeof (long))
371 /* size_t = long long */
374 else if (sizeof (size_t) > sizeof (int))
383 if (sizeof (ptrdiff_t) > sizeof (long))
385 /* ptrdiff_t = long long */
388 else if (sizeof (ptrdiff_t) > sizeof (int))
390 /* ptrdiff_t = long */
395 #if defined __APPLE__ && defined __MACH__
396 /* On MacOS X 10.3, PRIdMAX is defined as "qd".
397 We cannot change it to "lld" because PRIdMAX must also
398 be understood by the system's printf routines. */
401 if (64 / 8 > sizeof (long))
403 /* int64_t = long long */
414 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
415 /* On native Win32, PRIdMAX is defined as "I64d".
416 We cannot change it to "lld" because PRIdMAX must also
417 be understood by the system's printf routines. */
418 else if (*cp == 'I' && cp[1] == '6' && cp[2] == '4')
420 if (64 / 8 > sizeof (long))
422 /* __int64 = long long */
437 /* Read the conversion character. */
442 #if HAVE_LONG_LONG_INT
443 /* If 'long long' exists and is larger than 'long': */
444 if (flags >= 16 || (flags & 4))
445 type = TYPE_LONGLONGINT;
448 /* If 'long long' exists and is the same as 'long', we parse
449 "lld" into TYPE_LONGINT. */
459 case 'o': case 'u': case 'x': case 'X':
460 #if HAVE_LONG_LONG_INT
461 /* If 'long long' exists and is larger than 'long': */
462 if (flags >= 16 || (flags & 4))
463 type = TYPE_ULONGLONGINT;
466 /* If 'unsigned long long' exists and is the same as
467 'unsigned long', we parse "llu" into TYPE_ULONGINT. */
469 type = TYPE_ULONGINT;
477 case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
479 if (flags >= 16 || (flags & 4))
480 type = TYPE_LONGDOUBLE;
487 type = TYPE_WIDE_CHAR;
496 type = TYPE_WIDE_CHAR;
503 type = TYPE_WIDE_STRING;
512 type = TYPE_WIDE_STRING;
520 #if HAVE_LONG_LONG_INT
521 /* If 'long long' exists and is larger than 'long': */
522 if (flags >= 16 || (flags & 4))
523 type = TYPE_COUNT_LONGLONGINT_POINTER;
526 /* If 'long long' exists and is the same as 'long', we parse
527 "lln" into TYPE_COUNT_LONGINT_POINTER. */
529 type = TYPE_COUNT_LONGINT_POINTER;
531 type = TYPE_COUNT_SCHAR_POINTER;
533 type = TYPE_COUNT_SHORT_POINTER;
535 type = TYPE_COUNT_INT_POINTER;
538 /* The unistdio extensions. */
541 type = TYPE_U32_STRING;
543 type = TYPE_U16_STRING;
545 type = TYPE_U8_STRING;
552 /* Unknown conversion character. */
557 if (type != TYPE_NONE)
559 dp->arg_index = arg_index;
560 if (dp->arg_index == ARG_NONE)
562 dp->arg_index = arg_posn++;
563 if (dp->arg_index == ARG_NONE)
564 /* arg_posn wrapped around. */
567 REGISTER_ARG (dp->arg_index, type);
574 if (d->count >= d_allocated)
579 d_allocated = xtimes (d_allocated, 2);
580 memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
581 if (size_overflow_p (memory_size))
582 /* Overflow, would lead to out of memory. */
584 memory = (DIRECTIVE *) realloc (d->dir, memory_size);
591 #if CHAR_T_ONLY_ASCII
592 else if (!c_isascii (c))
594 /* Non-ASCII character. Not supported. */
599 d->dir[d->count].dir_start = cp;
601 d->max_width_length = max_width_length;
602 d->max_precision_length = max_precision_length;
626 #undef CHAR_T_ONLY_ASCII