]> git.ipfire.org Git - thirdparty/gcc.git/blame - gcc/c-format.c
projects / thirdparty / gcc.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
re PR testsuite/27476 (ACATS: Ada testsuite Bourne shell compatibility problem on...
[thirdparty/gcc.git] / gcc / c-format.c
CommitLineData
1312c143 1/* Check calls to formatted I/O functions (-Wformat).
4636c87e 2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
5f996627 3 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
1312c143 4
1322177d 5This file is part of GCC.
1312c143 6
1322177d
LB		 7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
1312c143 11
1322177d
LB		 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
1312c143
JM		 16
17You should have received a copy of the GNU General Public License
1322177d 18along with GCC; see the file COPYING. If not, write to the Free
366ccddb
KC		 19Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2002110-1301, USA. */
1312c143
JM		 21
22#include "config.h"
23#include "system.h"
4977bab6
ZW		 24#include "coretypes.h"
25#include "tm.h"
1312c143
JM		 26#include "tree.h"
27#include "flags.h"
1312c143 28#include "c-common.h"
ea40ba9c 29#include "toplev.h"
1312c143
JM		 30#include "intl.h"
31#include "diagnostic.h"
ab393bf1 32#include "langhooks.h"
a2bec818 33#include "c-format.h"
1312c143 34\f
1312c143
JM		 35/* Set format warning options according to a -Wformat=n option. */
36
37void
35b1a6fa 38set_Wformat (int setting)
1312c143
JM		 39{
40 warn_format = setting;
1312c143 41 warn_format_extra_args = setting;
e964a556 42 warn_format_zero_length = setting;
1312c143
JM		 43 if (setting != 1)
44 {
45 warn_format_nonliteral = setting;
46 warn_format_security = setting;
c76f4e8e 47 warn_format_y2k = setting;
1312c143 48 }
b34c7881
JT		 49 /* Make sure not to disable -Wnonnull if -Wformat=0 is specified. */
50 if (setting)
51 warn_nonnull = setting;
1312c143
JM		 52}
53
54\f
55/* Handle attributes associated with format checking. */
56
a2bec818
DJ		 57/* This must be in the same order as format_types, except for
58 format_type_error. Target-specific format types do not have
59 matching enum values. */
3ae1d4c2 60enum format_type { printf_format_type, asm_fprintf_format_type,
ea40ba9c
JM		 61 gcc_diag_format_type, gcc_tdiag_format_type,
62 gcc_cdiag_format_type,
0ce0154c 63 gcc_cxxdiag_format_type, gcc_gfc_format_type,
3ae1d4c2 64 scanf_format_type, strftime_format_type,
a2bec818 65 strfmon_format_type, format_type_error = -1};
1312c143 66
80a497e4
JM		 67typedef struct function_format_info
68{
a2bec818 69 int format_type; /* type of format (printf, scanf, etc.) */
80a497e4
JM		 70 unsigned HOST_WIDE_INT format_num; /* number of format argument */
71 unsigned HOST_WIDE_INT first_arg_num; /* number of first arg (zero for varargs) */
72} function_format_info;
73
35b1a6fa 74static bool decode_format_attr (tree, function_format_info *, int);
a2bec818 75static int decode_format_type (const char *);
1312c143 76
75b2a93c
OS		 77static bool check_format_string (tree argument,
78 unsigned HOST_WIDE_INT format_num,
79 int flags, bool *no_add_attrs);
80static bool get_constant (tree expr, unsigned HOST_WIDE_INT *value,
81 int validated_p);
1312c143
JM		 82
83
80a497e4 84/* Handle a "format_arg" attribute; arguments as in
91d231cb
JM		 85 struct attribute_spec.handler. */
86tree
e18476eb 87handle_format_arg_attribute (tree *node, tree ARG_UNUSED (name),
3a947669 88 tree args, int flags, bool *no_add_attrs)
1312c143 89{
80a497e4 90 tree type = *node;
1312c143 91 tree format_num_expr = TREE_VALUE (args);
6de9cd9a 92 unsigned HOST_WIDE_INT format_num = 0;
1312c143
JM		 93 tree argument;
94
75b2a93c 95 if (!get_constant (format_num_expr, &format_num, 0))
1312c143
JM		 96 {
97 error ("format string has invalid operand number");
91d231cb
JM		 98 *no_add_attrs = true;
99 return NULL_TREE;
1312c143
JM		 100 }
101
1312c143
JM		 102 argument = TYPE_ARG_TYPES (type);
103 if (argument)
104 {
75b2a93c
OS		 105 if (!check_format_string (argument, format_num, flags, no_add_attrs))
106 return NULL_TREE;
1312c143
JM		 107 }
108
80a497e4
JM		 109 if (TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE
110 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type)))
1312c143
JM		 111 != char_type_node))
112 {
6431177a
JM		 113 if (!(flags & (int) ATTR_FLAG_BUILT_IN))
114 error ("function does not return string type");
91d231cb
JM		 115 *no_add_attrs = true;
116 return NULL_TREE;
1312c143
JM		 117 }
118
91d231cb 119 return NULL_TREE;
1312c143
JM		 120}
121
75b2a93c
OS		 122/* Verify that the format_num argument is actually a string, in case
123 the format attribute is in error. */
8ce33230 124static bool
75b2a93c
OS		 125check_format_string (tree argument, unsigned HOST_WIDE_INT format_num,
126 int flags, bool *no_add_attrs)
127{
128 unsigned HOST_WIDE_INT i;
129
130 for (i = 1; i != format_num; i++)
131 {
132 if (argument == 0)
133 break;
134 argument = TREE_CHAIN (argument);
135 }
136
137 if (!argument
138 || TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE
139 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (argument)))
140 != char_type_node))
141 {
142 if (!(flags & (int) ATTR_FLAG_BUILT_IN))
40b97a2e 143 error ("format string argument not a string type");
75b2a93c
OS		 144 *no_add_attrs = true;
145 return false;
146 }
147
148 return true;
149}
150
f6d1c3a6 151/* Verify EXPR is a constant, and store its value.
535a42b1 152 If validated_p is true there should be no errors.
71c0e7fc 153 Returns true on success, false otherwise. */
8ce33230 154static bool
366de0ce 155get_constant (tree expr, unsigned HOST_WIDE_INT *value, int validated_p)
75b2a93c 156{
75b2a93c
OS		 157 if (TREE_CODE (expr) != INTEGER_CST || TREE_INT_CST_HIGH (expr) != 0)
158 {
366de0ce 159 gcc_assert (!validated_p);
75b2a93c
OS		 160 return false;
161 }
162
163 *value = TREE_INT_CST_LOW (expr);
164
165 return true;
166}
1312c143 167
535a42b1
NS		 168/* Decode the arguments to a "format" attribute into a
169 function_format_info structure. It is already known that the list
170 is of the right length. If VALIDATED_P is true, then these
171 attributes have already been validated and must not be erroneous;
172 if false, it will give an error message. Returns true if the
173 attributes are successfully decoded, false otherwise. */
1312c143 174
80a497e4 175static bool
35b1a6fa 176decode_format_attr (tree args, function_format_info *info, int validated_p)
1312c143 177{
80a497e4
JM		 178 tree format_type_id = TREE_VALUE (args);
179 tree format_num_expr = TREE_VALUE (TREE_CHAIN (args));
180 tree first_arg_num_expr
181 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (args)));
1312c143 182
80a497e4 183 if (TREE_CODE (format_type_id) != IDENTIFIER_NODE)
1312c143 184 {
366de0ce 185 gcc_assert (!validated_p);
80a497e4
JM		 186 error ("unrecognized format specifier");
187 return false;
1312c143 188 }
80a497e4 189 else
1312c143 190 {
80a497e4 191 const char *p = IDENTIFIER_POINTER (format_type_id);
1312c143 192
80a497e4 193 info->format_type = decode_format_type (p);
1312c143 194
80a497e4
JM		 195 if (info->format_type == format_type_error)
196 {
366de0ce 197 gcc_assert (!validated_p);
3176a0c2 198 warning (OPT_Wformat, "%qE is an unrecognized format function type",
c51a1ba9 199 format_type_id);
80a497e4
JM		 200 return false;
201 }
202 }
1312c143 203
75b2a93c 204 if (!get_constant (format_num_expr, &info->format_num, validated_p))
1312c143 205 {
80a497e4
JM		 206 error ("format string has invalid operand number");
207 return false;
1312c143
JM		 208 }
209
75b2a93c
OS		 210 if (!get_constant (first_arg_num_expr, &info->first_arg_num, validated_p))
211 {
9e637a26 212 error ("%<...%> has invalid operand number");
75b2a93c
OS		 213 return false;
214 }
215
80a497e4 216 if (info->first_arg_num != 0 && info->first_arg_num <= info->format_num)
1312c143 217 {
366de0ce 218 gcc_assert (!validated_p);
40b97a2e 219 error ("format string argument follows the args to be formatted");
80a497e4 220 return false;
1312c143
JM		 221 }
222
80a497e4 223 return true;
1312c143 224}
1312c143
JM		 225\f
226/* Check a call to a format function against a parameter list. */
227
1312c143
JM		 228/* The C standard version C++ is treated as equivalent to
229 or inheriting from, for the purpose of format features supported. */
ed0ea560 230#define CPLUSPLUS_STD_VER STD_C94
1312c143 231/* The C standard version we are checking formats against when pedantic. */
3f75a254
JM		 232#define C_STD_VER ((int) (c_dialect_cxx () \
233 ? CPLUSPLUS_STD_VER \
234 : (flag_isoc99 \
235 ? STD_C99 \
dbbbbf3b 236 : (flag_isoc94 ? STD_C94 : STD_C89))))
1312c143
JM		 237/* The name to give to the standard version we are warning about when
238 pedantic. FEATURE_VER is the version in which the feature warned out
239 appeared, which is higher than C_STD_VER. */
37fa72e9 240#define C_STD_NAME(FEATURE_VER) (c_dialect_cxx () \
1312c143
JM		 241 ? "ISO C++" \
242 : ((FEATURE_VER) == STD_EXT \
243 ? "ISO C" \
56508306 244 : "ISO C90"))
1312c143
JM		 245/* Adjust a C standard version, which may be STD_C9L, to account for
246 -Wno-long-long. Returns other standard versions unchanged. */
3f75a254 247#define ADJ_STD(VER) ((int) ((VER) == STD_C9L \
1312c143
JM		 248 ? (warn_long_long ? STD_C99 : STD_C89) \
249 : (VER)))
250
1312c143
JM		 251/* Structure describing details of a type expected in format checking,
252 and the type to check against it. */
253typedef struct format_wanted_type
254{
255 /* The type wanted. */
256 tree wanted_type;
257 /* The name of this type to use in diagnostics. */
258 const char *wanted_type_name;
259 /* The level of indirection through pointers at which this type occurs. */
260 int pointer_count;
261 /* Whether, when pointer_count is 1, to allow any character type when
262 pedantic, rather than just the character or void type specified. */
263 int char_lenient_flag;
264 /* Whether the argument, dereferenced once, is written into and so the
265 argument must not be a pointer to a const-qualified type. */
266 int writing_in_flag;
267 /* Whether the argument, dereferenced once, is read from and so
268 must not be a NULL pointer. */
269 int reading_from_flag;
ede1a387
JM		 270 /* If warnings should be of the form "field precision should have
271 type 'int'", the name to use (in this case "field precision"),
272 otherwise NULL, for "format expects type 'long'" type
273 messages. */
1312c143
JM		 274 const char *name;
275 /* The actual parameter to check against the wanted type. */
276 tree param;
277 /* The argument number of that parameter. */
278 int arg_num;
279 /* The next type to check for this format conversion, or NULL if none. */
280 struct format_wanted_type *next;
281} format_wanted_type;
282
283
284static const format_length_info printf_length_specs[] =
285{
286 { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99 },
287 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C9L },
288 { "q", FMT_LEN_ll, STD_EXT, NULL, 0, 0 },
289 { "L", FMT_LEN_L, STD_C89, NULL, 0, 0 },
290 { "z", FMT_LEN_z, STD_C99, NULL, 0, 0 },
291 { "Z", FMT_LEN_z, STD_EXT, NULL, 0, 0 },
292 { "t", FMT_LEN_t, STD_C99, NULL, 0, 0 },
293 { "j", FMT_LEN_j, STD_C99, NULL, 0, 0 },
9a8ce21f
JG		 294 { "H", FMT_LEN_H, STD_EXT, NULL, 0, 0 },
295 { "D", FMT_LEN_D, STD_EXT, "DD", FMT_LEN_DD, STD_EXT },
1312c143
JM		 296 { NULL, 0, 0, NULL, 0, 0 }
297};
298
3ae1d4c2
KG		 299/* Length specifiers valid for asm_fprintf. */
300static const format_length_info asm_fprintf_length_specs[] =
301{
302 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89 },
303 { "w", FMT_LEN_none, STD_C89, NULL, 0, 0 },
304 { NULL, 0, 0, NULL, 0, 0 }
305};
1312c143 306
280c1e0d
KG		 307/* Length specifiers valid for GCC diagnostics. */
308static const format_length_info gcc_diag_length_specs[] =
309{
310 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89 },
311 { "w", FMT_LEN_none, STD_C89, NULL, 0, 0 },
312 { NULL, 0, 0, NULL, 0, 0 }
313};
314
315/* The custom diagnostics all accept the same length specifiers. */
ea40ba9c 316#define gcc_tdiag_length_specs gcc_diag_length_specs
280c1e0d
KG		 317#define gcc_cdiag_length_specs gcc_diag_length_specs
318#define gcc_cxxdiag_length_specs gcc_diag_length_specs
319
1312c143
JM		 320/* This differs from printf_length_specs only in that "Z" is not accepted. */
321static const format_length_info scanf_length_specs[] =
322{
323 { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99 },
324 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C9L },
325 { "q", FMT_LEN_ll, STD_EXT, NULL, 0, 0 },
326 { "L", FMT_LEN_L, STD_C89, NULL, 0, 0 },
327 { "z", FMT_LEN_z, STD_C99, NULL, 0, 0 },
328 { "t", FMT_LEN_t, STD_C99, NULL, 0, 0 },
329 { "j", FMT_LEN_j, STD_C99, NULL, 0, 0 },
9a8ce21f
JG		 330 { "H", FMT_LEN_H, STD_EXT, NULL, 0, 0 },
331 { "D", FMT_LEN_D, STD_EXT, "DD", FMT_LEN_DD, STD_EXT },
1312c143
JM		 332 { NULL, 0, 0, NULL, 0, 0 }
333};
334
335
336/* All tables for strfmon use STD_C89 everywhere, since -pedantic warnings
337 make no sense for a format type not part of any C standard version. */
338static const format_length_info strfmon_length_specs[] =
339{
340 /* A GNU extension. */
341 { "L", FMT_LEN_L, STD_C89, NULL, 0, 0 },
342 { NULL, 0, 0, NULL, 0, 0 }
343};
344
345static const format_flag_spec printf_flag_specs[] =
346{
971801ff
JM		 347 { ' ', 0, 0, N_("' ' flag"), N_("the ' ' printf flag"), STD_C89 },
348 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
349 { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 },
350 { '0', 0, 0, N_("'0' flag"), N_("the '0' printf flag"), STD_C89 },
351 { '-', 0, 0, N_("'-' flag"), N_("the '-' printf flag"), STD_C89 },
352 { '\'', 0, 0, N_("''' flag"), N_("the ''' printf flag"), STD_EXT },
353 { 'I', 0, 0, N_("'I' flag"), N_("the 'I' printf flag"), STD_EXT },
1312c143
JM		 354 { 'w', 0, 0, N_("field width"), N_("field width in printf format"), STD_C89 },
355 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
356 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
357 { 0, 0, 0, NULL, NULL, 0 }
358};
359
360
361static const format_flag_pair printf_flag_pairs[] =
362{
363 { ' ', '+', 1, 0 },
364 { '0', '-', 1, 0 },
365 { '0', 'p', 1, 'i' },
366 { 0, 0, 0, 0 }
367};
368
3ae1d4c2
KG		 369static const format_flag_spec asm_fprintf_flag_specs[] =
370{
971801ff
JM		 371 { ' ', 0, 0, N_("' ' flag"), N_("the ' ' printf flag"), STD_C89 },
372 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
373 { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 },
374 { '0', 0, 0, N_("'0' flag"), N_("the '0' printf flag"), STD_C89 },
375 { '-', 0, 0, N_("'-' flag"), N_("the '-' printf flag"), STD_C89 },
3ae1d4c2
KG		 376 { 'w', 0, 0, N_("field width"), N_("field width in printf format"), STD_C89 },
377 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
378 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
379 { 0, 0, 0, NULL, NULL, 0 }
380};
381
382static const format_flag_pair asm_fprintf_flag_pairs[] =
383{
384 { ' ', '+', 1, 0 },
385 { '0', '-', 1, 0 },
386 { '0', 'p', 1, 'i' },
387 { 0, 0, 0, 0 }
388};
1312c143 389
280c1e0d
KG		 390static const format_flag_pair gcc_diag_flag_pairs[] =
391{
392 { 0, 0, 0, 0 }
393};
394
ea40ba9c 395#define gcc_tdiag_flag_pairs gcc_diag_flag_pairs
280c1e0d
KG		 396#define gcc_cdiag_flag_pairs gcc_diag_flag_pairs
397#define gcc_cxxdiag_flag_pairs gcc_diag_flag_pairs
398
0ce0154c
KG		 399static const format_flag_pair gcc_gfc_flag_pairs[] =
400{
401 { 0, 0, 0, 0 }
402};
403
280c1e0d
KG		 404static const format_flag_spec gcc_diag_flag_specs[] =
405{
dee15844 406 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
971801ff 407 { 'q', 0, 0, N_("'q' flag"), N_("the 'q' diagnostic flag"), STD_C89 },
280c1e0d
KG		 408 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
409 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
410 { 0, 0, 0, NULL, NULL, 0 }
411};
412
ea40ba9c 413#define gcc_tdiag_flag_specs gcc_diag_flag_specs
280c1e0d
KG		 414#define gcc_cdiag_flag_specs gcc_diag_flag_specs
415
416static const format_flag_spec gcc_cxxdiag_flag_specs[] =
417{
971801ff
JM		 418 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
419 { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 },
420 { 'q', 0, 0, N_("'q' flag"), N_("the 'q' diagnostic flag"), STD_C89 },
280c1e0d
KG		 421 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
422 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
423 { 0, 0, 0, NULL, NULL, 0 }
424};
425
1312c143
JM		 426static const format_flag_spec scanf_flag_specs[] =
427{
53fcdc76 428 { '*', 0, 0, N_("assignment suppression"), N_("the assignment suppression scanf feature"), STD_C89 },
971801ff 429 { 'a', 0, 0, N_("'a' flag"), N_("the 'a' scanf flag"), STD_EXT },
53fcdc76
PB		 430 { 'w', 0, 0, N_("field width"), N_("field width in scanf format"), STD_C89 },
431 { 'L', 0, 0, N_("length modifier"), N_("length modifier in scanf format"), STD_C89 },
971801ff
JM		 432 { '\'', 0, 0, N_("''' flag"), N_("the ''' scanf flag"), STD_EXT },
433 { 'I', 0, 0, N_("'I' flag"), N_("the 'I' scanf flag"), STD_EXT },
1312c143
JM		 434 { 0, 0, 0, NULL, NULL, 0 }
435};
436
437
438static const format_flag_pair scanf_flag_pairs[] =
439{
440 { '*', 'L', 0, 0 },
441 { 0, 0, 0, 0 }
442};
443
444
445static const format_flag_spec strftime_flag_specs[] =
446{
971801ff
JM		 447 { '_', 0, 0, N_("'_' flag"), N_("the '_' strftime flag"), STD_EXT },
448 { '-', 0, 0, N_("'-' flag"), N_("the '-' strftime flag"), STD_EXT },
449 { '0', 0, 0, N_("'0' flag"), N_("the '0' strftime flag"), STD_EXT },
450 { '^', 0, 0, N_("'^' flag"), N_("the '^' strftime flag"), STD_EXT },
451 { '#', 0, 0, N_("'#' flag"), N_("the '#' strftime flag"), STD_EXT },
1312c143 452 { 'w', 0, 0, N_("field width"), N_("field width in strftime format"), STD_EXT },
971801ff
JM		 453 { 'E', 0, 0, N_("'E' modifier"), N_("the 'E' strftime modifier"), STD_C99 },
454 { 'O', 0, 0, N_("'O' modifier"), N_("the 'O' strftime modifier"), STD_C99 },
455 { 'O', 'o', 0, NULL, N_("the 'O' modifier"), STD_EXT },
1312c143
JM		 456 { 0, 0, 0, NULL, NULL, 0 }
457};
458
459
460static const format_flag_pair strftime_flag_pairs[] =
461{
462 { 'E', 'O', 0, 0 },
463 { '_', '-', 0, 0 },
464 { '_', '0', 0, 0 },
465 { '-', '0', 0, 0 },
466 { '^', '#', 0, 0 },
467 { 0, 0, 0, 0 }
468};
469
470
471static const format_flag_spec strfmon_flag_specs[] =
472{
473 { '=', 0, 1, N_("fill character"), N_("fill character in strfmon format"), STD_C89 },
971801ff
JM		 474 { '^', 0, 0, N_("'^' flag"), N_("the '^' strfmon flag"), STD_C89 },
475 { '+', 0, 0, N_("'+' flag"), N_("the '+' strfmon flag"), STD_C89 },
476 { '(', 0, 0, N_("'(' flag"), N_("the '(' strfmon flag"), STD_C89 },
477 { '!', 0, 0, N_("'!' flag"), N_("the '!' strfmon flag"), STD_C89 },
478 { '-', 0, 0, N_("'-' flag"), N_("the '-' strfmon flag"), STD_C89 },
1312c143
JM		 479 { 'w', 0, 0, N_("field width"), N_("field width in strfmon format"), STD_C89 },
480 { '#', 0, 0, N_("left precision"), N_("left precision in strfmon format"), STD_C89 },
481 { 'p', 0, 0, N_("right precision"), N_("right precision in strfmon format"), STD_C89 },
482 { 'L', 0, 0, N_("length modifier"), N_("length modifier in strfmon format"), STD_C89 },
483 { 0, 0, 0, NULL, NULL, 0 }
484};
485
486static const format_flag_pair strfmon_flag_pairs[] =
487{
488 { '+', '(', 0, 0 },
489 { 0, 0, 0, 0 }
490};
491
492
1312c143
JM		 493static const format_char_info print_char_table[] =
494{
495 /* C89 conversion specifiers. */
9a8ce21f
JG		 496 { "di", 0, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, TEX_LL, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "-wp0 +'I", "i", NULL },
497 { "oxX", 0, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "-wp0#", "i", NULL },
498 { "u", 0, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "-wp0'I", "i", NULL },
499 { "fgG", 0, STD_C89, { T89_D, BADLEN, BADLEN, T99_D, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "-wp0 +#'I", "", NULL },
500 { "eE", 0, STD_C89, { T89_D, BADLEN, BADLEN, T99_D, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "-wp0 +#I", "", NULL },
501 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, T94_WI, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL },
502 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", NULL },
503 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "c", NULL },
504 { "n", 1, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, BADLEN, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "", "W", NULL },
1312c143 505 /* C99 conversion specifiers. */
9a8ce21f
JG		 506 { "F", 0, STD_C99, { T99_D, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "-wp0 +#'I", "", NULL },
507 { "aA", 0, STD_C99, { T99_D, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +#", "", NULL },
1312c143 508 /* X/Open conversion specifiers. */
9a8ce21f
JG		 509 { "C", 0, STD_EXT, { TEX_WI, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL },
510 { "S", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "R", NULL },
1312c143 511 /* GNU conversion specifiers. */
9a8ce21f 512 { "m", 0, STD_EXT, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "", NULL },
a2bec818 513 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
1312c143
JM		 514};
515
3ae1d4c2
KG		 516static const format_char_info asm_fprintf_char_table[] =
517{
518 /* C89 conversion specifiers. */
9a8ce21f
JG		 519 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +", "i", NULL },
520 { "oxX", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0#", "i", NULL },
521 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0", "i", NULL },
522 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL },
523 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", NULL },
3ae1d4c2
KG		 524
525 /* asm_fprintf conversion specifiers. */
a2bec818
DJ		 526 { "O", 0, STD_C89, NOARGUMENTS, "", "", NULL },
527 { "R", 0, STD_C89, NOARGUMENTS, "", "", NULL },
528 { "I", 0, STD_C89, NOARGUMENTS, "", "", NULL },
529 { "L", 0, STD_C89, NOARGUMENTS, "", "", NULL },
530 { "U", 0, STD_C89, NOARGUMENTS, "", "", NULL },
9a8ce21f 531 { "r", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL },
a2bec818
DJ		 532 { "@", 0, STD_C89, NOARGUMENTS, "", "", NULL },
533 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
3ae1d4c2
KG		 534};
535
280c1e0d
KG		 536static const format_char_info gcc_diag_char_table[] =
537{
538 /* C89 conversion specifiers. */
9a8ce21f
JG		 539 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
540 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
541 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
542 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
543 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
544 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
280c1e0d
KG		 545
546 /* Custom conversion specifiers. */
547
548 /* %H will require "location_t" at runtime. */
9a8ce21f 549 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
280c1e0d 550
ddd2d57e 551 /* These will require a "tree" at runtime. */
9a8ce21f 552 { "J", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
ddd2d57e 553
a2bec818
DJ		 554 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
555 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
556 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
280c1e0d
KG		 557};
558
ea40ba9c
JM		 559static const format_char_info gcc_tdiag_char_table[] =
560{
561 /* C89 conversion specifiers. */
562 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
563 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
564 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
565 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
566 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
567 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
568
569 /* Custom conversion specifiers. */
570
571 /* %H will require "location_t" at runtime. */
572 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
573
574 /* These will require a "tree" at runtime. */
575 { "DFJT", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+", "", NULL },
576
577 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
578 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
579 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
580};
581
280c1e0d
KG		 582static const format_char_info gcc_cdiag_char_table[] =
583{
584 /* C89 conversion specifiers. */
9a8ce21f
JG		 585 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
586 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
587 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
588 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
589 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
590 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
280c1e0d
KG		 591
592 /* Custom conversion specifiers. */
593
594 /* %H will require "location_t" at runtime. */
9a8ce21f 595 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
280c1e0d
KG		 596
597 /* These will require a "tree" at runtime. */
9a8ce21f 598 { "DEFJT", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+", "", NULL },
280c1e0d 599
a2bec818
DJ		 600 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
601 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
602 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
280c1e0d
KG		 603};
604
605static const format_char_info gcc_cxxdiag_char_table[] =
606{
607 /* C89 conversion specifiers. */
9a8ce21f
JG		 608 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
609 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
610 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
611 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
612 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
613 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
280c1e0d
KG		 614
615 /* Custom conversion specifiers. */
616
617 /* %H will require "location_t" at runtime. */
9a8ce21f 618 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
280c1e0d
KG		 619
620 /* These will require a "tree" at runtime. */
9a8ce21f 621 { "ADEFJTV",0,STD_C89,{ T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+#", "", NULL },
280c1e0d 622
971801ff 623 /* These accept either an 'int' or an 'enum tree_code' (which is handled as an 'int'.) */
9a8ce21f 624 { "CLOPQ",0,STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
280c1e0d 625
a2bec818
DJ		 626 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
627 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
628 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
280c1e0d
KG		 629};
630
0ce0154c
KG		 631static const format_char_info gcc_gfc_char_table[] =
632{
633 /* C89 conversion specifiers. */
634 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL },
635 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL },
636 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "cR", NULL },
637
638 /* gfc conversion specifiers. */
639
640 { "C", 0, STD_C89, NOARGUMENTS, "", "", NULL },
641
642 /* This will require a "locus" at runtime. */
643 { "L", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "R", NULL },
644
645 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
646};
647
1312c143
JM		 648static const format_char_info scan_char_table[] =
649{
650 /* C89 conversion specifiers. */
9a8ce21f
JG		 651 { "di", 1, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, TEX_LL, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "*w'I", "W", NULL },
652 { "u", 1, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "*w'I", "W", NULL },
653 { "oxX", 1, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL },
654 { "efgEG", 1, STD_C89, { T89_F, BADLEN, BADLEN, T89_D, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "*w'", "W", NULL },
655 { "c", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "cW", NULL },
656 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*aw", "cW", NULL },
657 { "[", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*aw", "cW[", NULL },
658 { "p", 2, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL },
659 { "n", 1, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, BADLEN, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "", "W", NULL },
1312c143 660 /* C99 conversion specifiers. */
9a8ce21f
JG		 661 { "F", 1, STD_C99, { T99_F, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "*w'", "W", NULL },
662 { "aA", 1, STD_C99, { T99_F, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w'", "W", NULL },
1312c143 663 /* X/Open conversion specifiers. */
9a8ce21f
JG		 664 { "C", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL },
665 { "S", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*aw", "W", NULL },
a2bec818 666 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
1312c143
JM		 667};
668
669static const format_char_info time_char_table[] =
670{
671 /* C89 conversion specifiers. */
a2bec818
DJ		 672 { "ABZab", 0, STD_C89, NOLENGTHS, "^#", "", NULL },
673 { "cx", 0, STD_C89, NOLENGTHS, "E", "3", NULL },
674 { "HIMSUWdmw", 0, STD_C89, NOLENGTHS, "-_0Ow", "", NULL },
675 { "j", 0, STD_C89, NOLENGTHS, "-_0Ow", "o", NULL },
676 { "p", 0, STD_C89, NOLENGTHS, "#", "", NULL },
677 { "X", 0, STD_C89, NOLENGTHS, "E", "", NULL },
678 { "y", 0, STD_C89, NOLENGTHS, "EO-_0w", "4", NULL },
679 { "Y", 0, STD_C89, NOLENGTHS, "-_0EOw", "o", NULL },
680 { "%", 0, STD_C89, NOLENGTHS, "", "", NULL },
1312c143 681 /* C99 conversion specifiers. */
a2bec818
DJ		 682 { "C", 0, STD_C99, NOLENGTHS, "-_0EOw", "o", NULL },
683 { "D", 0, STD_C99, NOLENGTHS, "", "2", NULL },
684 { "eVu", 0, STD_C99, NOLENGTHS, "-_0Ow", "", NULL },
685 { "FRTnrt", 0, STD_C99, NOLENGTHS, "", "", NULL },
686 { "g", 0, STD_C99, NOLENGTHS, "O-_0w", "2o", NULL },
687 { "G", 0, STD_C99, NOLENGTHS, "-_0Ow", "o", NULL },
688 { "h", 0, STD_C99, NOLENGTHS, "^#", "", NULL },
689 { "z", 0, STD_C99, NOLENGTHS, "O", "o", NULL },
1312c143 690 /* GNU conversion specifiers. */
a2bec818
DJ		 691 { "kls", 0, STD_EXT, NOLENGTHS, "-_0Ow", "", NULL },
692 { "P", 0, STD_EXT, NOLENGTHS, "", "", NULL },
693 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
1312c143
JM		 694};
695
696static const format_char_info monetary_char_table[] =
697{
9a8ce21f 698 { "in", 0, STD_C89, { T89_D, BADLEN, BADLEN, BADLEN, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "=^+(!-w#p", "", NULL },
a2bec818 699 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
1312c143
JM		 700};
701
1312c143 702/* This must be in the same order as enum format_type. */
3ae1d4c2 703static const format_kind_info format_types_orig[] =
1312c143
JM		 704{
705 { "printf", printf_length_specs, print_char_table, " +#0-'I", NULL,
706 printf_flag_specs, printf_flag_pairs,
707 FMT_FLAG_ARG_CONVERT|FMT_FLAG_DOLLAR_MULTIPLE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_EMPTY_PREC_OK,
708 'w', 0, 'p', 0, 'L',
709 &integer_type_node, &integer_type_node
710 },
3ae1d4c2
KG		 711 { "asm_fprintf", asm_fprintf_length_specs, asm_fprintf_char_table, " +#0-", NULL,
712 asm_fprintf_flag_specs, asm_fprintf_flag_pairs,
713 FMT_FLAG_ARG_CONVERT|FMT_FLAG_EMPTY_PREC_OK,
714 'w', 0, 'p', 0, 'L',
3af0187c 715 NULL, NULL
3ae1d4c2 716 },
dee15844 717 { "gcc_diag", gcc_diag_length_specs, gcc_diag_char_table, "q+", NULL,
280c1e0d
KG		 718 gcc_diag_flag_specs, gcc_diag_flag_pairs,
719 FMT_FLAG_ARG_CONVERT,
720 0, 0, 'p', 0, 'L',
721 NULL, &integer_type_node
722 },
ea40ba9c
JM		 723 { "gcc_tdiag", gcc_tdiag_length_specs, gcc_tdiag_char_table, "q+", NULL,
724 gcc_tdiag_flag_specs, gcc_tdiag_flag_pairs,
725 FMT_FLAG_ARG_CONVERT,
726 0, 0, 'p', 0, 'L',
727 NULL, &integer_type_node
728 },
dee15844 729 { "gcc_cdiag", gcc_cdiag_length_specs, gcc_cdiag_char_table, "q+", NULL,
280c1e0d
KG		 730 gcc_cdiag_flag_specs, gcc_cdiag_flag_pairs,
731 FMT_FLAG_ARG_CONVERT,
732 0, 0, 'p', 0, 'L',
733 NULL, &integer_type_node
734 },
a668adb2 735 { "gcc_cxxdiag", gcc_cxxdiag_length_specs, gcc_cxxdiag_char_table, "q+#", NULL,
280c1e0d
KG		 736 gcc_cxxdiag_flag_specs, gcc_cxxdiag_flag_pairs,
737 FMT_FLAG_ARG_CONVERT,
738 0, 0, 'p', 0, 'L',
739 NULL, &integer_type_node
740 },
0ce0154c
KG		 741 { "gcc_gfc", NULL, gcc_gfc_char_table, "", NULL,
742 NULL, gcc_gfc_flag_pairs,
743 FMT_FLAG_ARG_CONVERT,
744 0, 0, 0, 0, 0,
745 NULL, NULL
746 },
1312c143
JM		 747 { "scanf", scanf_length_specs, scan_char_table, "*'I", NULL,
748 scanf_flag_specs, scanf_flag_pairs,
7e5fb12f 749 FMT_FLAG_ARG_CONVERT|FMT_FLAG_SCANF_A_KLUDGE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_ZERO_WIDTH_BAD|FMT_FLAG_DOLLAR_GAP_POINTER_OK,
1312c143
JM		 750 'w', 0, 0, '*', 'L',
751 NULL, NULL
752 },
753 { "strftime", NULL, time_char_table, "_-0^#", "EO",
754 strftime_flag_specs, strftime_flag_pairs,
755 FMT_FLAG_FANCY_PERCENT_OK, 'w', 0, 0, 0, 0,
756 NULL, NULL
757 },
758 { "strfmon", strfmon_length_specs, monetary_char_table, "=^+(!-", NULL,
759 strfmon_flag_specs, strfmon_flag_pairs,
760 FMT_FLAG_ARG_CONVERT, 'w', '#', 'p', 0, 'L',
761 NULL, NULL
762 }
763};
764
3ae1d4c2
KG		 765/* This layer of indirection allows GCC to reassign format_types with
766 new data if necessary, while still allowing the original data to be
767 const. */
768static const format_kind_info *format_types = format_types_orig;
a2bec818
DJ		 769/* We can modify this one. We also add target-specific format types
770 to the end of the array. */
89d09f83 771static format_kind_info *dynamic_format_types;
1312c143 772
a2bec818
DJ		 773static int n_format_types = ARRAY_SIZE (format_types_orig);
774
1312c143
JM		 775/* Structure detailing the results of checking a format function call
776 where the format expression may be a conditional expression with
777 many leaves resulting from nested conditional expressions. */
778typedef struct
779{
780 /* Number of leaves of the format argument that could not be checked
781 as they were not string literals. */
782 int number_non_literal;
783 /* Number of leaves of the format argument that were null pointers or
784 string literals, but had extra format arguments. */
785 int number_extra_args;
786 /* Number of leaves of the format argument that were null pointers or
787 string literals, but had extra format arguments and used $ operand
788 numbers. */
789 int number_dollar_extra_args;
790 /* Number of leaves of the format argument that were wide string
791 literals. */
792 int number_wide;
793 /* Number of leaves of the format argument that were empty strings. */
794 int number_empty;
795 /* Number of leaves of the format argument that were unterminated
796 strings. */
797 int number_unterminated;
798 /* Number of leaves of the format argument that were not counted above. */
799 int number_other;
800} format_check_results;
801
b34c7881
JT		 802typedef struct
803{
804 format_check_results *res;
805 function_format_info *info;
806 tree params;
b34c7881
JT		 807} format_check_context;
808
99801548 809static void check_format_info (function_format_info *, tree);
35b1a6fa 810static void check_format_arg (void *, tree, unsigned HOST_WIDE_INT);
99801548 811static void check_format_info_main (format_check_results *,
35b1a6fa
AJ		 812 function_format_info *,
813 const char *, int, tree,
814 unsigned HOST_WIDE_INT);
1312c143 815
35b1a6fa 816static void init_dollar_format_checking (int, tree);
99801548 817static int maybe_read_dollar_number (const char **, int,
35b1a6fa 818 tree, tree *, const format_kind_info *);
99801548
JM		 819static bool avoid_dollar_number (const char *);
820static void finish_dollar_format_checking (format_check_results *, int);
1312c143 821
35b1a6fa
AJ		 822static const format_flag_spec *get_flag_spec (const format_flag_spec *,
823 int, const char *);
1312c143 824
ede1a387
JM		 825static void check_format_types (format_wanted_type *, const char *, int);
826static void format_type_warning (const char *, const char *, int, tree,
827 int, const char *, tree, int);
1312c143
JM		 828
829/* Decode a format type from a string, returning the type, or
830 format_type_error if not valid, in which case the caller should print an
831 error message. */
a2bec818 832static int
35b1a6fa 833decode_format_type (const char *s)
1312c143
JM		 834{
835 int i;
836 int slen;
837 slen = strlen (s);
a2bec818 838 for (i = 0; i < n_format_types; i++)
1312c143
JM		 839 {
840 int alen;
841 if (!strcmp (s, format_types[i].name))
a2bec818 842 return i;
1312c143
JM		 843 alen = strlen (format_types[i].name);
844 if (slen == alen + 4 && s[0] == '_' && s[1] == '_'
845 && s[slen - 1] == '_' && s[slen - 2] == '_'
846 && !strncmp (s + 2, format_types[i].name, alen))
a2bec818 847 return i;
1312c143 848 }
a2bec818 849 return format_type_error;
1312c143
JM		 850}
851
852\f
853/* Check the argument list of a call to printf, scanf, etc.
80a497e4 854 ATTRS are the attributes on the function type.
1312c143
JM		 855 PARAMS is the list of argument values. Also, if -Wmissing-format-attribute,
856 warn for calls to vprintf or vscanf in functions with no such format
857 attribute themselves. */
858
859void
99801548 860check_function_format (tree attrs, tree params)
1312c143 861{
80a497e4 862 tree a;
1312c143 863
80a497e4
JM		 864 /* See if this function has any format attributes. */
865 for (a = attrs; a; a = TREE_CHAIN (a))
1312c143 866 {
80a497e4 867 if (is_attribute_p ("format", TREE_PURPOSE (a)))
1312c143
JM		 868 {
869 /* Yup; check it. */
80a497e4
JM		 870 function_format_info info;
871 decode_format_attr (TREE_VALUE (a), &info, 1);
7876a414
KG		 872 if (warn_format)
873 check_format_info (&info, params);
80a497e4
JM		 874 if (warn_missing_format_attribute && info.first_arg_num == 0
875 && (format_types[info.format_type].flags
dbbbbf3b 876 & (int) FMT_FLAG_ARG_CONVERT))
1312c143 877 {
80a497e4
JM		 878 tree c;
879 for (c = TYPE_ATTRIBUTES (TREE_TYPE (current_function_decl));
880 c;
881 c = TREE_CHAIN (c))
882 if (is_attribute_p ("format", TREE_PURPOSE (c))
883 && (decode_format_type (IDENTIFIER_POINTER
884 (TREE_VALUE (TREE_VALUE (c))))
885 == info.format_type))
1312c143 886 break;
80a497e4 887 if (c == NULL_TREE)
1312c143
JM		 888 {
889 /* Check if the current function has a parameter to which
890 the format attribute could be attached; if not, it
891 can't be a candidate for a format attribute, despite
892 the vprintf-like or vscanf-like call. */
893 tree args;
894 for (args = DECL_ARGUMENTS (current_function_decl);
895 args != 0;
896 args = TREE_CHAIN (args))
897 {
898 if (TREE_CODE (TREE_TYPE (args)) == POINTER_TYPE
899 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (args)))
900 == char_type_node))
901 break;
902 }
903 if (args != 0)
1a8d0d41
DD		 904 warning (OPT_Wmissing_format_attribute, "function might "
905 "be possible candidate for %qs format attribute",
80a497e4 906 format_types[info.format_type].name);
1312c143
JM		 907 }
908 }
1312c143
JM		 909 }
910 }
911}
912
1312c143
JM		 913
914/* Variables used by the checking of $ operand number formats. */
915static char *dollar_arguments_used = NULL;
7e5fb12f 916static char *dollar_arguments_pointer_p = NULL;
1312c143
JM		 917static int dollar_arguments_alloc = 0;
918static int dollar_arguments_count;
919static int dollar_first_arg_num;
920static int dollar_max_arg_used;
921static int dollar_format_warned;
922
923/* Initialize the checking for a format string that may contain $
924 parameter number specifications; we will need to keep track of whether
925 each parameter has been used. FIRST_ARG_NUM is the number of the first
926 argument that is a parameter to the format, or 0 for a vprintf-style
927 function; PARAMS is the list of arguments starting at this argument. */
928
929static void
35b1a6fa 930init_dollar_format_checking (int first_arg_num, tree params)
1312c143 931{
7e5fb12f
JM		 932 tree oparams = params;
933
1312c143
JM		 934 dollar_first_arg_num = first_arg_num;
935 dollar_arguments_count = 0;
936 dollar_max_arg_used = 0;
937 dollar_format_warned = 0;
938 if (first_arg_num > 0)
939 {
940 while (params)
941 {
942 dollar_arguments_count++;
943 params = TREE_CHAIN (params);
944 }
945 }
946 if (dollar_arguments_alloc < dollar_arguments_count)
947 {
948 if (dollar_arguments_used)
949 free (dollar_arguments_used);
7e5fb12f
JM		 950 if (dollar_arguments_pointer_p)
951 free (dollar_arguments_pointer_p);
1312c143 952 dollar_arguments_alloc = dollar_arguments_count;
28dab132
BI		 953 dollar_arguments_used = XNEWVEC (char, dollar_arguments_alloc);
954 dollar_arguments_pointer_p = XNEWVEC (char, dollar_arguments_alloc);
1312c143
JM		 955 }
956 if (dollar_arguments_alloc)
7e5fb12f
JM		 957 {
958 memset (dollar_arguments_used, 0, dollar_arguments_alloc);
959 if (first_arg_num > 0)
960 {
961 int i = 0;
962 params = oparams;
963 while (params)
964 {
965 dollar_arguments_pointer_p[i] = (TREE_CODE (TREE_TYPE (TREE_VALUE (params)))
966 == POINTER_TYPE);
967 params = TREE_CHAIN (params);
968 i++;
969 }
970 }
971 }
1312c143
JM		 972}
973
974
975/* Look for a decimal number followed by a $ in *FORMAT. If DOLLAR_NEEDED
976 is set, it is an error if one is not found; otherwise, it is OK. If
977 such a number is found, check whether it is within range and mark that
978 numbered operand as being used for later checking. Returns the operand
979 number if found and within range, zero if no such number was found and
980 this is OK, or -1 on error. PARAMS points to the first operand of the
981 format; PARAM_PTR is made to point to the parameter referred to. If
982 a $ format is found, *FORMAT is updated to point just after it. */
983
984static int
99801548 985maybe_read_dollar_number (const char **format,
35b1a6fa
AJ		 986 int dollar_needed, tree params, tree *param_ptr,
987 const format_kind_info *fki)
1312c143
JM		 988{
989 int argnum;
990 int overflow_flag;
991 const char *fcp = *format;
3f75a254 992 if (!ISDIGIT (*fcp))
1312c143
JM		 993 {
994 if (dollar_needed)
995 {
3176a0c2 996 warning (OPT_Wformat, "missing $ operand number in format");
1312c143
JM		 997 return -1;
998 }
999 else
1000 return 0;
1001 }
1002 argnum = 0;
1003 overflow_flag = 0;
0df6c2c7 1004 while (ISDIGIT (*fcp))
1312c143
JM		 1005 {
1006 int nargnum;
1007 nargnum = 10 * argnum + (*fcp - '0');
1008 if (nargnum < 0 || nargnum / 10 != argnum)
1009 overflow_flag = 1;
1010 argnum = nargnum;
1011 fcp++;
1012 }
1013 if (*fcp != '$')
1014 {
1015 if (dollar_needed)
1016 {
3176a0c2 1017 warning (OPT_Wformat, "missing $ operand number in format");
1312c143
JM		 1018 return -1;
1019 }
1020 else
1021 return 0;
1022 }
1023 *format = fcp + 1;
1024 if (pedantic && !dollar_format_warned)
1025 {
3176a0c2 1026 warning (OPT_Wformat, "%s does not support %%n$ operand number formats",
99801548 1027 C_STD_NAME (STD_EXT));
1312c143
JM		 1028 dollar_format_warned = 1;
1029 }
1030 if (overflow_flag || argnum == 0
1031 || (dollar_first_arg_num && argnum > dollar_arguments_count))
1032 {
3176a0c2 1033 warning (OPT_Wformat, "operand number out of range in format");
1312c143
JM		 1034 return -1;
1035 }
1036 if (argnum > dollar_max_arg_used)
1037 dollar_max_arg_used = argnum;
1038 /* For vprintf-style functions we may need to allocate more memory to
1039 track which arguments are used. */
1040 while (dollar_arguments_alloc < dollar_max_arg_used)
1041 {
1042 int nalloc;
1043 nalloc = 2 * dollar_arguments_alloc + 16;
28dab132
BI		 1044 dollar_arguments_used = XRESIZEVEC (char, dollar_arguments_used,
1045 nalloc);
1046 dollar_arguments_pointer_p = XRESIZEVEC (char, dollar_arguments_pointer_p,
1047 nalloc);
1312c143
JM		 1048 memset (dollar_arguments_used + dollar_arguments_alloc, 0,
1049 nalloc - dollar_arguments_alloc);
1050 dollar_arguments_alloc = nalloc;
1051 }
dbbbbf3b 1052 if (!(fki->flags & (int) FMT_FLAG_DOLLAR_MULTIPLE)
1312c143
JM		 1053 && dollar_arguments_used[argnum - 1] == 1)
1054 {
1055 dollar_arguments_used[argnum - 1] = 2;
3176a0c2 1056 warning (OPT_Wformat, "format argument %d used more than once in %s format",
99801548 1057 argnum, fki->name);
1312c143
JM		 1058 }
1059 else
1060 dollar_arguments_used[argnum - 1] = 1;
1061 if (dollar_first_arg_num)
1062 {
1063 int i;
1064 *param_ptr = params;
1065 for (i = 1; i < argnum && *param_ptr != 0; i++)
1066 *param_ptr = TREE_CHAIN (*param_ptr);
1067
366de0ce
NS		 1068 /* This case shouldn't be caught here. */
1069 gcc_assert (*param_ptr);
1312c143
JM		 1070 }
1071 else
1072 *param_ptr = 0;
1073 return argnum;
1074}
1075
e9a75776
JM		 1076/* Ensure that FORMAT does not start with a decimal number followed by
1077 a $; give a diagnostic and return true if it does, false otherwise. */
1078
1079static bool
99801548 1080avoid_dollar_number (const char *format)
e9a75776
JM		 1081{
1082 if (!ISDIGIT (*format))
1083 return false;
1084 while (ISDIGIT (*format))
1085 format++;
1086 if (*format == '$')
1087 {
3176a0c2 1088 warning (OPT_Wformat, "$ operand number used after format without operand number");
e9a75776
JM		 1089 return true;
1090 }
1091 return false;
1092}
1093
1312c143
JM		 1094
1095/* Finish the checking for a format string that used $ operand number formats
1096 instead of non-$ formats. We check for unused operands before used ones
1097 (a serious error, since the implementation of the format function
1098 can't know what types to pass to va_arg to find the later arguments).
1099 and for unused operands at the end of the format (if we know how many
1100 arguments the format had, so not for vprintf). If there were operand
1101 numbers out of range on a non-vprintf-style format, we won't have reached
7e5fb12f
JM		 1102 here. If POINTER_GAP_OK, unused arguments are OK if all arguments are
1103 pointers. */
1312c143
JM		 1104
1105static void
99801548 1106finish_dollar_format_checking (format_check_results *res, int pointer_gap_ok)
1312c143
JM		 1107{
1108 int i;
7e5fb12f 1109 bool found_pointer_gap = false;
1312c143
JM		 1110 for (i = 0; i < dollar_max_arg_used; i++)
1111 {
1112 if (!dollar_arguments_used[i])
7e5fb12f
JM		 1113 {
1114 if (pointer_gap_ok && (dollar_first_arg_num == 0
1115 || dollar_arguments_pointer_p[i]))
1116 found_pointer_gap = true;
1117 else
3176a0c2
DD		 1118 warning (OPT_Wformat,
1119 "format argument %d unused before used argument %d in $-style format",
99801548 1120 i + 1, dollar_max_arg_used);
7e5fb12f 1121 }
1312c143 1122 }
7e5fb12f
JM		 1123 if (found_pointer_gap
1124 || (dollar_first_arg_num
1125 && dollar_max_arg_used < dollar_arguments_count))
1312c143
JM		 1126 {
1127 res->number_other--;
1128 res->number_dollar_extra_args++;
1129 }
1130}
1131
1132
1133/* Retrieve the specification for a format flag. SPEC contains the
1134 specifications for format flags for the applicable kind of format.
1135 FLAG is the flag in question. If PREDICATES is NULL, the basic
535a42b1
NS		 1136 spec for that flag must be retrieved and must exist. If
1137 PREDICATES is not NULL, it is a string listing possible predicates
1138 for the spec entry; if an entry predicated on any of these is
1139 found, it is returned, otherwise NULL is returned. */
1312c143
JM		 1140
1141static const format_flag_spec *
35b1a6fa 1142get_flag_spec (const format_flag_spec *spec, int flag, const char *predicates)
1312c143
JM		 1143{
1144 int i;
1145 for (i = 0; spec[i].flag_char != 0; i++)
1146 {
1147 if (spec[i].flag_char != flag)
1148 continue;
1149 if (predicates != NULL)
1150 {
1151 if (spec[i].predicate != 0
1152 && strchr (predicates, spec[i].predicate) != 0)
1153 return &spec[i];
1154 }
1155 else if (spec[i].predicate == 0)
1156 return &spec[i];
1157 }
366de0ce
NS		 1158 gcc_assert (predicates);
1159 return NULL;
1312c143
JM		 1160}
1161
1162
1163/* Check the argument list of a call to printf, scanf, etc.
1164 INFO points to the function_format_info structure.
1165 PARAMS is the list of argument values. */
1166
1167static void
99801548 1168check_format_info (function_format_info *info, tree params)
1312c143 1169{
b34c7881 1170 format_check_context format_ctx;
80a497e4 1171 unsigned HOST_WIDE_INT arg_num;
1312c143
JM		 1172 tree format_tree;
1173 format_check_results res;
1174 /* Skip to format argument. If the argument isn't available, there's
1175 no work for us to do; prototype checking will catch the problem. */
1176 for (arg_num = 1; ; ++arg_num)
1177 {
1178 if (params == 0)
1179 return;
1180 if (arg_num == info->format_num)
1181 break;
1182 params = TREE_CHAIN (params);
1183 }
1184 format_tree = TREE_VALUE (params);
1185 params = TREE_CHAIN (params);
1186 if (format_tree == 0)
1187 return;
1188
1189 res.number_non_literal = 0;
1190 res.number_extra_args = 0;
1191 res.number_dollar_extra_args = 0;
1192 res.number_wide = 0;
1193 res.number_empty = 0;
1194 res.number_unterminated = 0;
1195 res.number_other = 0;
1196
b34c7881
JT		 1197 format_ctx.res = &res;
1198 format_ctx.info = info;
1199 format_ctx.params = params;
b34c7881
JT		 1200
1201 check_function_arguments_recurse (check_format_arg, &format_ctx,
1202 format_tree, arg_num);
1312c143
JM		 1203
1204 if (res.number_non_literal > 0)
1205 {
1206 /* Functions taking a va_list normally pass a non-literal format
1207 string. These functions typically are declared with
1208 first_arg_num == 0, so avoid warning in those cases. */
dbbbbf3b 1209 if (!(format_types[info->format_type].flags & (int) FMT_FLAG_ARG_CONVERT))
1312c143
JM		 1210 {
1211 /* For strftime-like formats, warn for not checking the format
1212 string; but there are no arguments to check. */
44c21c7f
DD		 1213 warning (OPT_Wformat_nonliteral,
1214 "format not a string literal, format string not checked");
1312c143
JM		 1215 }
1216 else if (info->first_arg_num != 0)
1217 {
1218 /* If there are no arguments for the format at all, we may have
1219 printf (foo) which is likely to be a security hole. */
1220 while (arg_num + 1 < info->first_arg_num)
1221 {
1222 if (params == 0)
1223 break;
1224 params = TREE_CHAIN (params);
1225 ++arg_num;
1226 }
44c21c7f
DD		 1227 if (params == 0 && warn_format_security)
1228 warning (OPT_Wformat_security,
1229 "format not a string literal and no format arguments");
1230 else if (params == 0 && warn_format_nonliteral)
1231 warning (OPT_Wformat_nonliteral,
1232 "format not a string literal and no format arguments");
1233 else
1234 warning (OPT_Wformat_nonliteral,
1235 "format not a string literal, argument types not checked");
1312c143
JM		 1236 }
1237 }
1238
1239 /* If there were extra arguments to the format, normally warn. However,
1240 the standard does say extra arguments are ignored, so in the specific
1241 case where we have multiple leaves (conditional expressions or
1242 ngettext) allow extra arguments if at least one leaf didn't have extra
1243 arguments, but was otherwise OK (either non-literal or checked OK).
1244 If the format is an empty string, this should be counted similarly to the
1245 case of extra format arguments. */
1246 if (res.number_extra_args > 0 && res.number_non_literal == 0
3176a0c2
DD		 1247 && res.number_other == 0)
1248 warning (OPT_Wformat_extra_args, "too many arguments for format");
1312c143 1249 if (res.number_dollar_extra_args > 0 && res.number_non_literal == 0
3176a0c2
DD		 1250 && res.number_other == 0)
1251 warning (OPT_Wformat_extra_args, "unused arguments in $-style format");
1312c143 1252 if (res.number_empty > 0 && res.number_non_literal == 0
3176a0c2
DD		 1253 && res.number_other == 0)
1254 warning (OPT_Wformat_zero_length, "zero-length %s format string",
99801548 1255 format_types[info->format_type].name);
1312c143
JM		 1256
1257 if (res.number_wide > 0)
3176a0c2 1258 warning (OPT_Wformat, "format is a wide character string");
1312c143
JM		 1259
1260 if (res.number_unterminated > 0)
3176a0c2 1261 warning (OPT_Wformat, "unterminated format string");
1312c143
JM		 1262}
1263
b34c7881
JT		 1264/* Callback from check_function_arguments_recurse to check a
1265 format string. FORMAT_TREE is the format parameter. ARG_NUM
1266 is the number of the format argument. CTX points to a
1267 format_check_context. */
1312c143
JM		 1268
1269static void
35b1a6fa
AJ		 1270check_format_arg (void *ctx, tree format_tree,
1271 unsigned HOST_WIDE_INT arg_num)
1312c143 1272{
28dab132 1273 format_check_context *format_ctx = (format_check_context *) ctx;
b34c7881
JT		 1274 format_check_results *res = format_ctx->res;
1275 function_format_info *info = format_ctx->info;
1276 tree params = format_ctx->params;
b34c7881 1277
1312c143 1278 int format_length;
b5cd6849 1279 HOST_WIDE_INT offset;
1312c143
JM		 1280 const char *format_chars;
1281 tree array_size = 0;
1282 tree array_init;
1283
1312c143
JM		 1284 if (integer_zerop (format_tree))
1285 {
1312c143
JM		 1286 /* Skip to first argument to check, so we can see if this format
1287 has any arguments (it shouldn't). */
1288 while (arg_num + 1 < info->first_arg_num)
1289 {
1290 if (params == 0)
1291 return;
1292 params = TREE_CHAIN (params);
1293 ++arg_num;
1294 }
1295
1296 if (params == 0)
1297 res->number_other++;
1298 else
1299 res->number_extra_args++;
1300
1301 return;
1302 }
1303
b5cd6849
JJ		 1304 offset = 0;
1305 if (TREE_CODE (format_tree) == PLUS_EXPR)
1306 {
1307 tree arg0, arg1;
1308
1309 arg0 = TREE_OPERAND (format_tree, 0);
1310 arg1 = TREE_OPERAND (format_tree, 1);
1311 STRIP_NOPS (arg0);
1312 STRIP_NOPS (arg1);
1313 if (TREE_CODE (arg1) == INTEGER_CST)
1314 format_tree = arg0;
1315 else if (TREE_CODE (arg0) == INTEGER_CST)
1316 {
1317 format_tree = arg1;
1318 arg1 = arg0;
1319 }
1320 else
1321 {
1322 res->number_non_literal++;
1323 return;
1324 }
4636c87e
JJ		 1325 if (!host_integerp (arg1, 0)
1326 || (offset = tree_low_cst (arg1, 0)) < 0)
b5cd6849
JJ		 1327 {
1328 res->number_non_literal++;
1329 return;
1330 }
b5cd6849 1331 }
1312c143
JM		 1332 if (TREE_CODE (format_tree) != ADDR_EXPR)
1333 {
1334 res->number_non_literal++;
1335 return;
1336 }
1337 format_tree = TREE_OPERAND (format_tree, 0);
f5c9a097
RG		 1338 if (TREE_CODE (format_tree) == ARRAY_REF
1339 && host_integerp (TREE_OPERAND (format_tree, 1), 0)
1340 && (offset += tree_low_cst (TREE_OPERAND (format_tree, 1), 0)) >= 0)
1341 format_tree = TREE_OPERAND (format_tree, 0);
1312c143
JM		 1342 if (TREE_CODE (format_tree) == VAR_DECL
1343 && TREE_CODE (TREE_TYPE (format_tree)) == ARRAY_TYPE
1344 && (array_init = decl_constant_value (format_tree)) != format_tree
1345 && TREE_CODE (array_init) == STRING_CST)
1346 {
1347 /* Extract the string constant initializer. Note that this may include
1348 a trailing NUL character that is not in the array (e.g.
1349 const char a[3] = "foo";). */
1350 array_size = DECL_SIZE_UNIT (format_tree);
1351 format_tree = array_init;
1352 }
1353 if (TREE_CODE (format_tree) != STRING_CST)
1354 {
1355 res->number_non_literal++;
1356 return;
1357 }
1358 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (format_tree))) != char_type_node)
1359 {
1360 res->number_wide++;
1361 return;
1362 }
1363 format_chars = TREE_STRING_POINTER (format_tree);
1364 format_length = TREE_STRING_LENGTH (format_tree);
1365 if (array_size != 0)
1366 {
1367 /* Variable length arrays can't be initialized. */
366de0ce
NS		 1368 gcc_assert (TREE_CODE (array_size) == INTEGER_CST);
1369
1312c143
JM		 1370 if (host_integerp (array_size, 0))
1371 {
1372 HOST_WIDE_INT array_size_value = TREE_INT_CST_LOW (array_size);
1373 if (array_size_value > 0
1374 && array_size_value == (int) array_size_value
1375 && format_length > array_size_value)
1376 format_length = array_size_value;
1377 }
1378 }
b5cd6849
JJ		 1379 if (offset)
1380 {
1381 if (offset >= format_length)
1382 {
1383 res->number_non_literal++;
1384 return;
1385 }
1386 format_chars += offset;
1387 format_length -= offset;
1388 }
1312c143
JM		 1389 if (format_length < 1)
1390 {
1391 res->number_unterminated++;
1392 return;
1393 }
1394 if (format_length == 1)
1395 {
1396 res->number_empty++;
1397 return;
1398 }
1399 if (format_chars[--format_length] != 0)
1400 {
1401 res->number_unterminated++;
1402 return;
1403 }
1404
1405 /* Skip to first argument to check. */
1406 while (arg_num + 1 < info->first_arg_num)
1407 {
1408 if (params == 0)
1409 return;
1410 params = TREE_CHAIN (params);
1411 ++arg_num;
1412 }
1413 /* Provisionally increment res->number_other; check_format_info_main
1414 will decrement it if it finds there are extra arguments, but this way
1415 need not adjust it for every return. */
1416 res->number_other++;
99801548 1417 check_format_info_main (res, info, format_chars, format_length,
1312c143
JM		 1418 params, arg_num);
1419}
1420
1421
1422/* Do the main part of checking a call to a format function. FORMAT_CHARS
1423 is the NUL-terminated format string (which at this point may contain
1424 internal NUL characters); FORMAT_LENGTH is its length (excluding the
1425 terminating NUL character). ARG_NUM is one less than the number of
1426 the first format argument to check; PARAMS points to that format
1427 argument in the list of arguments. */
1428
1429static void
99801548 1430check_format_info_main (format_check_results *res,
35b1a6fa
AJ		 1431 function_format_info *info, const char *format_chars,
1432 int format_length, tree params,
1433 unsigned HOST_WIDE_INT arg_num)
1312c143
JM		 1434{
1435 const char *orig_format_chars = format_chars;
1436 tree first_fillin_param = params;
1437
1438 const format_kind_info *fki = &format_types[info->format_type];
1439 const format_flag_spec *flag_specs = fki->flag_specs;
1440 const format_flag_pair *bad_flag_pairs = fki->bad_flag_pairs;
1441
1442 /* -1 if no conversions taking an operand have been found; 0 if one has
1443 and it didn't use $; 1 if $ formats are in use. */
1444 int has_operand_number = -1;
1445
1446 init_dollar_format_checking (info->first_arg_num, first_fillin_param);
1447
1448 while (1)
1449 {
1450 int i;
1451 int suppressed = FALSE;
1452 const char *length_chars = NULL;
1453 enum format_lengths length_chars_val = FMT_LEN_none;
1454 enum format_std_version length_chars_std = STD_C89;
1455 int format_char;
1456 tree cur_param;
1457 tree wanted_type;
1458 int main_arg_num = 0;
1459 tree main_arg_params = 0;
1460 enum format_std_version wanted_type_std;
1461 const char *wanted_type_name;
1462 format_wanted_type width_wanted_type;
1463 format_wanted_type precision_wanted_type;
1464 format_wanted_type main_wanted_type;
1465 format_wanted_type *first_wanted_type = NULL;
1466 format_wanted_type *last_wanted_type = NULL;
1467 const format_length_info *fli = NULL;
1468 const format_char_info *fci = NULL;
1469 char flag_chars[256];
1470 int aflag = 0;
ede1a387 1471 const char *format_start = format_chars;
1312c143
JM		 1472 if (*format_chars == 0)
1473 {
1474 if (format_chars - orig_format_chars != format_length)
3176a0c2 1475 warning (OPT_Wformat, "embedded %<\\0%> in format");
1312c143
JM		 1476 if (info->first_arg_num != 0 && params != 0
1477 && has_operand_number <= 0)
1478 {
1479 res->number_other--;
1480 res->number_extra_args++;
1481 }
1482 if (has_operand_number > 0)
99801548 1483 finish_dollar_format_checking (res, fki->flags & (int) FMT_FLAG_DOLLAR_GAP_POINTER_OK);
1312c143
JM		 1484 return;
1485 }
1486 if (*format_chars++ != '%')
1487 continue;
1488 if (*format_chars == 0)
1489 {
3176a0c2 1490 warning (OPT_Wformat, "spurious trailing %<%%%> in format");
1312c143
JM		 1491 continue;
1492 }
1493 if (*format_chars == '%')
1494 {
1495 ++format_chars;
1496 continue;
1497 }
1498 flag_chars[0] = 0;
1499
dbbbbf3b 1500 if ((fki->flags & (int) FMT_FLAG_USE_DOLLAR) && has_operand_number != 0)
1312c143
JM		 1501 {
1502 /* Possibly read a $ operand number at the start of the format.
1503 If one was previously used, one is required here. If one
1504 is not used here, we can't immediately conclude this is a
1505 format without them, since it could be printf %m or scanf %*. */
1506 int opnum;
99801548 1507 opnum = maybe_read_dollar_number (&format_chars, 0,
1312c143
JM		 1508 first_fillin_param,
1509 &main_arg_params, fki);
1510 if (opnum == -1)
1511 return;
1512 else if (opnum > 0)
1513 {
1514 has_operand_number = 1;
1515 main_arg_num = opnum + info->first_arg_num - 1;
1516 }
1517 }
e9a75776
JM		 1518 else if (fki->flags & FMT_FLAG_USE_DOLLAR)
1519 {
99801548 1520 if (avoid_dollar_number (format_chars))
e9a75776
JM		 1521 return;
1522 }
1312c143
JM		 1523
1524 /* Read any format flags, but do not yet validate them beyond removing
1525 duplicates, since in general validation depends on the rest of
1526 the format. */
1527 while (*format_chars != 0
1528 && strchr (fki->flag_chars, *format_chars) != 0)
1529 {
1530 const format_flag_spec *s = get_flag_spec (flag_specs,
1531 *format_chars, NULL);
1532 if (strchr (flag_chars, *format_chars) != 0)
1533 {
3176a0c2 1534 warning (OPT_Wformat, "repeated %s in format", _(s->name));
1312c143
JM		 1535 }
1536 else
1537 {
1538 i = strlen (flag_chars);
1539 flag_chars[i++] = *format_chars;
1540 flag_chars[i] = 0;
1541 }
1542 if (s->skip_next_char)
1543 {
1544 ++format_chars;
1545 if (*format_chars == 0)
1546 {
3176a0c2 1547 warning (OPT_Wformat, "missing fill character at end of strfmon format");
1312c143
JM		 1548 return;
1549 }
1550 }
1551 ++format_chars;
1552 }
1553
1554 /* Read any format width, possibly * or *m$. */
1555 if (fki->width_char != 0)
1556 {
1557 if (fki->width_type != NULL && *format_chars == '*')
1558 {
1559 i = strlen (flag_chars);
1560 flag_chars[i++] = fki->width_char;
1561 flag_chars[i] = 0;
1562 /* "...a field width...may be indicated by an asterisk.
1563 In this case, an int argument supplies the field width..." */
1564 ++format_chars;
1312c143
JM		 1565 if (has_operand_number != 0)
1566 {
1567 int opnum;
99801548 1568 opnum = maybe_read_dollar_number (&format_chars,
1312c143
JM		 1569 has_operand_number == 1,
1570 first_fillin_param,
1571 &params, fki);
1572 if (opnum == -1)
1573 return;
1574 else if (opnum > 0)
1575 {
1576 has_operand_number = 1;
1577 arg_num = opnum + info->first_arg_num - 1;
1578 }
1579 else
1580 has_operand_number = 0;
1581 }
e9a75776
JM		 1582 else
1583 {
99801548 1584 if (avoid_dollar_number (format_chars))
e9a75776
JM		 1585 return;
1586 }
1312c143
JM		 1587 if (info->first_arg_num != 0)
1588 {
5a3085c5
JM		 1589 if (params == 0)
1590 {
3176a0c2 1591 warning (OPT_Wformat, "too few arguments for format");
5a3085c5
JM		 1592 return;
1593 }
1312c143
JM		 1594 cur_param = TREE_VALUE (params);
1595 if (has_operand_number <= 0)
1596 {
1597 params = TREE_CHAIN (params);
1598 ++arg_num;
1599 }
1600 width_wanted_type.wanted_type = *fki->width_type;
1601 width_wanted_type.wanted_type_name = NULL;
1602 width_wanted_type.pointer_count = 0;
1603 width_wanted_type.char_lenient_flag = 0;
1604 width_wanted_type.writing_in_flag = 0;
1605 width_wanted_type.reading_from_flag = 0;
1606 width_wanted_type.name = _("field width");
1607 width_wanted_type.param = cur_param;
1608 width_wanted_type.arg_num = arg_num;
1609 width_wanted_type.next = NULL;
1610 if (last_wanted_type != 0)
1611 last_wanted_type->next = &width_wanted_type;
1612 if (first_wanted_type == 0)
1613 first_wanted_type = &width_wanted_type;
1614 last_wanted_type = &width_wanted_type;
1615 }
1616 }
1617 else
1618 {
1619 /* Possibly read a numeric width. If the width is zero,
1620 we complain if appropriate. */
1621 int non_zero_width_char = FALSE;
1622 int found_width = FALSE;
1623 while (ISDIGIT (*format_chars))
1624 {
1625 found_width = TRUE;
1626 if (*format_chars != '0')
1627 non_zero_width_char = TRUE;
1628 ++format_chars;
1629 }
1630 if (found_width && !non_zero_width_char &&
dbbbbf3b 1631 (fki->flags & (int) FMT_FLAG_ZERO_WIDTH_BAD))
3176a0c2 1632 warning (OPT_Wformat, "zero width in %s format", fki->name);
1312c143
JM		 1633 if (found_width)
1634 {
1635 i = strlen (flag_chars);
1636 flag_chars[i++] = fki->width_char;
1637 flag_chars[i] = 0;
1638 }
1639 }
1640 }
1641
1642 /* Read any format left precision (must be a number, not *). */
1643 if (fki->left_precision_char != 0 && *format_chars == '#')
1644 {
1645 ++format_chars;
1646 i = strlen (flag_chars);
1647 flag_chars[i++] = fki->left_precision_char;
1648 flag_chars[i] = 0;
1649 if (!ISDIGIT (*format_chars))
3176a0c2 1650 warning (OPT_Wformat, "empty left precision in %s format", fki->name);
1312c143
JM		 1651 while (ISDIGIT (*format_chars))
1652 ++format_chars;
1653 }
1654
1655 /* Read any format precision, possibly * or *m$. */
1656 if (fki->precision_char != 0 && *format_chars == '.')
1657 {
1658 ++format_chars;
1659 i = strlen (flag_chars);
1660 flag_chars[i++] = fki->precision_char;
1661 flag_chars[i] = 0;
1662 if (fki->precision_type != NULL && *format_chars == '*')
1663 {
1664 /* "...a...precision...may be indicated by an asterisk.
1665 In this case, an int argument supplies the...precision." */
1666 ++format_chars;
1667 if (has_operand_number != 0)
1668 {
1669 int opnum;
99801548 1670 opnum = maybe_read_dollar_number (&format_chars,
1312c143
JM		 1671 has_operand_number == 1,
1672 first_fillin_param,
1673 &params, fki);
1674 if (opnum == -1)
1675 return;
1676 else if (opnum > 0)
1677 {
1678 has_operand_number = 1;
1679 arg_num = opnum + info->first_arg_num - 1;
1680 }
1681 else
1682 has_operand_number = 0;
1683 }
e9a75776
JM		 1684 else
1685 {
99801548 1686 if (avoid_dollar_number (format_chars))
e9a75776
JM		 1687 return;
1688 }
1312c143
JM		 1689 if (info->first_arg_num != 0)
1690 {
1691 if (params == 0)
1692 {
3176a0c2 1693 warning (OPT_Wformat, "too few arguments for format");
1312c143
JM		 1694 return;
1695 }
1696 cur_param = TREE_VALUE (params);
1697 if (has_operand_number <= 0)
1698 {
1699 params = TREE_CHAIN (params);
1700 ++arg_num;
1701 }
1702 precision_wanted_type.wanted_type = *fki->precision_type;
1703 precision_wanted_type.wanted_type_name = NULL;
1704 precision_wanted_type.pointer_count = 0;
1705 precision_wanted_type.char_lenient_flag = 0;
1706 precision_wanted_type.writing_in_flag = 0;
1707 precision_wanted_type.reading_from_flag = 0;
1708 precision_wanted_type.name = _("field precision");
1709 precision_wanted_type.param = cur_param;
1710 precision_wanted_type.arg_num = arg_num;
1711 precision_wanted_type.next = NULL;
1712 if (last_wanted_type != 0)
1713 last_wanted_type->next = &precision_wanted_type;
1714 if (first_wanted_type == 0)
1715 first_wanted_type = &precision_wanted_type;
1716 last_wanted_type = &precision_wanted_type;
1717 }
1718 }
1719 else
1720 {
dbbbbf3b 1721 if (!(fki->flags & (int) FMT_FLAG_EMPTY_PREC_OK)
1312c143 1722 && !ISDIGIT (*format_chars))
3176a0c2 1723 warning (OPT_Wformat, "empty precision in %s format", fki->name);
1312c143
JM		 1724 while (ISDIGIT (*format_chars))
1725 ++format_chars;
1726 }
1727 }
1728
1729 /* Read any length modifier, if this kind of format has them. */
1730 fli = fki->length_char_specs;
1731 length_chars = NULL;
1732 length_chars_val = FMT_LEN_none;
1733 length_chars_std = STD_C89;
1734 if (fli)
1735 {
1736 while (fli->name != 0 && fli->name[0] != *format_chars)
1737 fli++;
1738 if (fli->name != 0)
1739 {
1740 format_chars++;
1741 if (fli->double_name != 0 && fli->name[0] == *format_chars)
1742 {
1743 format_chars++;
1744 length_chars = fli->double_name;
1745 length_chars_val = fli->double_index;
1746 length_chars_std = fli->double_std;
1747 }
1748 else
1749 {
1750 length_chars = fli->name;
1751 length_chars_val = fli->index;
1752 length_chars_std = fli->std;
1753 }
1754 i = strlen (flag_chars);
1755 flag_chars[i++] = fki->length_code_char;
1756 flag_chars[i] = 0;
1757 }
1758 if (pedantic)
1759 {
1760 /* Warn if the length modifier is non-standard. */
1761 if (ADJ_STD (length_chars_std) > C_STD_VER)
3176a0c2
DD		 1762 warning (OPT_Wformat,
1763 "%s does not support the %qs %s length modifier",
99801548
JM		 1764 C_STD_NAME (length_chars_std), length_chars,
1765 fki->name);
1312c143
JM		 1766 }
1767 }
1768
1769 /* Read any modifier (strftime E/O). */
1770 if (fki->modifier_chars != NULL)
1771 {
1772 while (*format_chars != 0
1773 && strchr (fki->modifier_chars, *format_chars) != 0)
1774 {
1775 if (strchr (flag_chars, *format_chars) != 0)
1776 {
1777 const format_flag_spec *s = get_flag_spec (flag_specs,
1778 *format_chars, NULL);
3176a0c2 1779 warning (OPT_Wformat, "repeated %s in format", _(s->name));
1312c143
JM		 1780 }
1781 else
1782 {
1783 i = strlen (flag_chars);
1784 flag_chars[i++] = *format_chars;
1785 flag_chars[i] = 0;
1786 }
1787 ++format_chars;
1788 }
1789 }
1790
1791 /* Handle the scanf allocation kludge. */
dbbbbf3b 1792 if (fki->flags & (int) FMT_FLAG_SCANF_A_KLUDGE)
1312c143
JM		 1793 {
1794 if (*format_chars == 'a' && !flag_isoc99)
1795 {
1796 if (format_chars[1] == 's' || format_chars[1] == 'S'
1797 || format_chars[1] == '[')
1798 {
971801ff 1799 /* 'a' is used as a flag. */
1312c143
JM		 1800 i = strlen (flag_chars);
1801 flag_chars[i++] = 'a';
1802 flag_chars[i] = 0;
1803 format_chars++;
1804 }
1805 }
1806 }
1807
1808 format_char = *format_chars;
1809 if (format_char == 0
dbbbbf3b
JDA		 1810 || (!(fki->flags & (int) FMT_FLAG_FANCY_PERCENT_OK)
1811 && format_char == '%'))
1312c143 1812 {
3176a0c2 1813 warning (OPT_Wformat, "conversion lacks type at end of format");
1312c143
JM		 1814 continue;
1815 }
1816 format_chars++;
1817 fci = fki->conversion_specs;
1818 while (fci->format_chars != 0
1819 && strchr (fci->format_chars, format_char) == 0)
1820 ++fci;
1821 if (fci->format_chars == 0)
1822 {
3f75a254 1823 if (ISGRAPH (format_char))
3176a0c2 1824 warning (OPT_Wformat, "unknown conversion type character %qc in format",
1312c143
JM		 1825 format_char);
1826 else
3176a0c2 1827 warning (OPT_Wformat, "unknown conversion type character 0x%x in format",
1312c143
JM		 1828 format_char);
1829 continue;
1830 }
1831 if (pedantic)
1832 {
1833 if (ADJ_STD (fci->std) > C_STD_VER)
3176a0c2 1834 warning (OPT_Wformat, "%s does not support the %<%%%c%> %s format",
99801548 1835 C_STD_NAME (fci->std), format_char, fki->name);
1312c143
JM		 1836 }
1837
1838 /* Validate the individual flags used, removing any that are invalid. */
1839 {
1840 int d = 0;
1841 for (i = 0; flag_chars[i] != 0; i++)
1842 {
1843 const format_flag_spec *s = get_flag_spec (flag_specs,
1844 flag_chars[i], NULL);
1845 flag_chars[i - d] = flag_chars[i];
1846 if (flag_chars[i] == fki->length_code_char)
1847 continue;
1848 if (strchr (fci->flag_chars, flag_chars[i]) == 0)
1849 {
3176a0c2 1850 warning (OPT_Wformat, "%s used with %<%%%c%> %s format",
99801548 1851 _(s->name), format_char, fki->name);
1312c143
JM		 1852 d++;
1853 continue;
1854 }
1855 if (pedantic)
1856 {
1857 const format_flag_spec *t;
1858 if (ADJ_STD (s->std) > C_STD_VER)
3176a0c2 1859 warning (OPT_Wformat, "%s does not support %s",
99801548 1860 C_STD_NAME (s->std), _(s->long_name));
1312c143
JM		 1861 t = get_flag_spec (flag_specs, flag_chars[i], fci->flags2);
1862 if (t != NULL && ADJ_STD (t->std) > ADJ_STD (s->std))
1863 {
1864 const char *long_name = (t->long_name != NULL
1865 ? t->long_name
1866 : s->long_name);
1867 if (ADJ_STD (t->std) > C_STD_VER)
3176a0c2
DD		 1868 warning (OPT_Wformat,
1869 "%s does not support %s with the %<%%%c%> %s format",
99801548
JM		 1870 C_STD_NAME (t->std), _(long_name),
1871 format_char, fki->name);
1312c143
JM		 1872 }
1873 }
1874 }
1875 flag_chars[i - d] = 0;
1876 }
1877
dbbbbf3b 1878 if ((fki->flags & (int) FMT_FLAG_SCANF_A_KLUDGE)
1312c143
JM		 1879 && strchr (flag_chars, 'a') != 0)
1880 aflag = 1;
1881
1882 if (fki->suppression_char
1883 && strchr (flag_chars, fki->suppression_char) != 0)
1884 suppressed = 1;
1885
1886 /* Validate the pairs of flags used. */
1887 for (i = 0; bad_flag_pairs[i].flag_char1 != 0; i++)
1888 {
1889 const format_flag_spec *s, *t;
1890 if (strchr (flag_chars, bad_flag_pairs[i].flag_char1) == 0)
1891 continue;
1892 if (strchr (flag_chars, bad_flag_pairs[i].flag_char2) == 0)
1893 continue;
1894 if (bad_flag_pairs[i].predicate != 0
1895 && strchr (fci->flags2, bad_flag_pairs[i].predicate) == 0)
1896 continue;
1897 s = get_flag_spec (flag_specs, bad_flag_pairs[i].flag_char1, NULL);
1898 t = get_flag_spec (flag_specs, bad_flag_pairs[i].flag_char2, NULL);
1899 if (bad_flag_pairs[i].ignored)
1900 {
1901 if (bad_flag_pairs[i].predicate != 0)
3176a0c2
DD		 1902 warning (OPT_Wformat,
1903 "%s ignored with %s and %<%%%c%> %s format",
99801548
JM		 1904 _(s->name), _(t->name), format_char,
1905 fki->name);
1312c143 1906 else
3176a0c2 1907 warning (OPT_Wformat, "%s ignored with %s in %s format",
99801548 1908 _(s->name), _(t->name), fki->name);
1312c143
JM		 1909 }
1910 else
1911 {
1912 if (bad_flag_pairs[i].predicate != 0)
3176a0c2
DD		 1913 warning (OPT_Wformat,
1914 "use of %s and %s together with %<%%%c%> %s format",
99801548
JM		 1915 _(s->name), _(t->name), format_char,
1916 fki->name);
1312c143 1917 else
3176a0c2 1918 warning (OPT_Wformat, "use of %s and %s together in %s format",
99801548 1919 _(s->name), _(t->name), fki->name);
1312c143
JM		 1920 }
1921 }
1922
1923 /* Give Y2K warnings. */
1924 if (warn_format_y2k)
1925 {
1926 int y2k_level = 0;
1927 if (strchr (fci->flags2, '4') != 0)
1928 if (strchr (flag_chars, 'E') != 0)
1929 y2k_level = 3;
1930 else
1931 y2k_level = 2;
1932 else if (strchr (fci->flags2, '3') != 0)
1933 y2k_level = 3;
1934 else if (strchr (fci->flags2, '2') != 0)
1935 y2k_level = 2;
1936 if (y2k_level == 3)
3176a0c2
DD		 1937 warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of "
1938 "year in some locales", format_char);
1312c143 1939 else if (y2k_level == 2)
3176a0c2
DD		 1940 warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of "
1941 "year", format_char);
1312c143
JM		 1942 }
1943
1944 if (strchr (fci->flags2, '[') != 0)
1945 {
1946 /* Skip over scan set, in case it happens to have '%' in it. */
1947 if (*format_chars == '^')
1948 ++format_chars;
1949 /* Find closing bracket; if one is hit immediately, then
1950 it's part of the scan set rather than a terminator. */
1951 if (*format_chars == ']')
1952 ++format_chars;
1953 while (*format_chars && *format_chars != ']')
1954 ++format_chars;
1955 if (*format_chars != ']')
1956 /* The end of the format string was reached. */
3176a0c2 1957 warning (OPT_Wformat, "no closing %<]%> for %<%%[%> format");
1312c143
JM		 1958 }
1959
1960 wanted_type = 0;
1961 wanted_type_name = 0;
dbbbbf3b 1962 if (fki->flags & (int) FMT_FLAG_ARG_CONVERT)
1312c143
JM		 1963 {
1964 wanted_type = (fci->types[length_chars_val].type
1965 ? *fci->types[length_chars_val].type : 0);
1966 wanted_type_name = fci->types[length_chars_val].name;
1967 wanted_type_std = fci->types[length_chars_val].std;
1968 if (wanted_type == 0)
1969 {
3176a0c2
DD		 1970 warning (OPT_Wformat,
1971 "use of %qs length modifier with %qc type character",
99801548 1972 length_chars, format_char);
1312c143
JM		 1973 /* Heuristic: skip one argument when an invalid length/type
1974 combination is encountered. */
1975 arg_num++;
1976 if (params == 0)
1977 {
3176a0c2 1978 warning (OPT_Wformat, "too few arguments for format");
1312c143
JM		 1979 return;
1980 }
1981 params = TREE_CHAIN (params);
1982 continue;
1983 }
1984 else if (pedantic
1985 /* Warn if non-standard, provided it is more non-standard
1986 than the length and type characters that may already
1987 have been warned for. */
1988 && ADJ_STD (wanted_type_std) > ADJ_STD (length_chars_std)
1989 && ADJ_STD (wanted_type_std) > ADJ_STD (fci->std))
1990 {
1991 if (ADJ_STD (wanted_type_std) > C_STD_VER)
3176a0c2
DD		 1992 warning (OPT_Wformat,
1993 "%s does not support the %<%%%s%c%> %s format",
99801548
JM		 1994 C_STD_NAME (wanted_type_std), length_chars,
1995 format_char, fki->name);
1312c143
JM		 1996 }
1997 }
1998
a2bec818
DJ		 1999 main_wanted_type.next = NULL;
2000
1312c143
JM		 2001 /* Finally. . .check type of argument against desired type! */
2002 if (info->first_arg_num == 0)
2003 continue;
2004 if ((fci->pointer_count == 0 && wanted_type == void_type_node)
2005 || suppressed)
2006 {
2007 if (main_arg_num != 0)
2008 {
2009 if (suppressed)
3176a0c2
DD		 2010 warning (OPT_Wformat, "operand number specified with "
2011 "suppressed assignment");
1312c143 2012 else
3176a0c2
DD		 2013 warning (OPT_Wformat, "operand number specified for format "
2014 "taking no argument");
1312c143
JM		 2015 }
2016 }
2017 else
2018 {
a2bec818
DJ		 2019 format_wanted_type *wanted_type_ptr;
2020
1312c143
JM		 2021 if (main_arg_num != 0)
2022 {
2023 arg_num = main_arg_num;
2024 params = main_arg_params;
2025 }
2026 else
2027 {
2028 ++arg_num;
2029 if (has_operand_number > 0)
2030 {
3176a0c2 2031 warning (OPT_Wformat, "missing $ operand number in format");
1312c143
JM		 2032 return;
2033 }
2034 else
2035 has_operand_number = 0;
a2bec818
DJ		 2036 }
2037
2038 wanted_type_ptr = &main_wanted_type;
2039 while (fci)
2040 {
1312c143
JM		 2041 if (params == 0)
2042 {
3176a0c2 2043 warning (OPT_Wformat, "too few arguments for format");
1312c143
JM		 2044 return;
2045 }
a2bec818
DJ		 2046
2047 cur_param = TREE_VALUE (params);
2048 params = TREE_CHAIN (params);
2049
2050 wanted_type_ptr->wanted_type = wanted_type;
2051 wanted_type_ptr->wanted_type_name = wanted_type_name;
2052 wanted_type_ptr->pointer_count = fci->pointer_count + aflag;
2053 wanted_type_ptr->char_lenient_flag = 0;
2054 if (strchr (fci->flags2, 'c') != 0)
2055 wanted_type_ptr->char_lenient_flag = 1;
2056 wanted_type_ptr->writing_in_flag = 0;
2057 wanted_type_ptr->reading_from_flag = 0;
2058 if (aflag)
2059 wanted_type_ptr->writing_in_flag = 1;
2060 else
2061 {
2062 if (strchr (fci->flags2, 'W') != 0)
2063 wanted_type_ptr->writing_in_flag = 1;
2064 if (strchr (fci->flags2, 'R') != 0)
2065 wanted_type_ptr->reading_from_flag = 1;
2066 }
2067 wanted_type_ptr->name = NULL;
2068 wanted_type_ptr->param = cur_param;
2069 wanted_type_ptr->arg_num = arg_num;
2070 wanted_type_ptr->next = NULL;
2071 if (last_wanted_type != 0)
2072 last_wanted_type->next = wanted_type_ptr;
2073 if (first_wanted_type == 0)
2074 first_wanted_type = wanted_type_ptr;
2075 last_wanted_type = wanted_type_ptr;
2076
2077 fci = fci->chain;
2078 if (fci)
2079 {
cceb1885 2080 wanted_type_ptr = GGC_NEW (format_wanted_type);
a2bec818
DJ		 2081 arg_num++;
2082 wanted_type = *fci->types[length_chars_val].type;
2083 wanted_type_name = fci->types[length_chars_val].name;
2084 }
1312c143 2085 }
1312c143
JM		 2086 }
2087
2088 if (first_wanted_type != 0)
ede1a387
JM		 2089 check_format_types (first_wanted_type, format_start,
2090 format_chars - format_start);
1312c143 2091
a2bec818
DJ		 2092 if (main_wanted_type.next != NULL)
2093 {
2094 format_wanted_type *wanted_type_ptr = main_wanted_type.next;
2095 while (wanted_type_ptr)
2096 {
2097 format_wanted_type *next = wanted_type_ptr->next;
2098 ggc_free (wanted_type_ptr);
2099 wanted_type_ptr = next;
2100 }
2101 }
1312c143
JM		 2102 }
2103}
2104
2105
2106/* Check the argument types from a single format conversion (possibly
2107 including width and precision arguments). */
2108static void
ede1a387
JM		 2109check_format_types (format_wanted_type *types, const char *format_start,
2110 int format_length)
1312c143
JM		 2111{
2112 for (; types != 0; types = types->next)
2113 {
2114 tree cur_param;
2115 tree cur_type;
2116 tree orig_cur_type;
2117 tree wanted_type;
1312c143
JM		 2118 int arg_num;
2119 int i;
2120 int char_type_flag;
2121 cur_param = types->param;
2122 cur_type = TREE_TYPE (cur_param);
2123 if (cur_type == error_mark_node)
2124 continue;
ede1a387 2125 orig_cur_type = cur_type;
1312c143
JM		 2126 char_type_flag = 0;
2127 wanted_type = types->wanted_type;
2128 arg_num = types->arg_num;
2129
2130 /* The following should not occur here. */
366de0ce
NS		 2131 gcc_assert (wanted_type);
2132 gcc_assert (wanted_type != void_type_node || types->pointer_count);
1312c143
JM		 2133
2134 if (types->pointer_count == 0)
ae2bcd98 2135 wanted_type = lang_hooks.types.type_promotes_to (wanted_type);
1312c143 2136
ede1a387
JM		 2137 wanted_type = TYPE_MAIN_VARIANT (wanted_type);
2138
1312c143
JM		 2139 STRIP_NOPS (cur_param);
2140
2141 /* Check the types of any additional pointer arguments
2142 that precede the "real" argument. */
2143 for (i = 0; i < types->pointer_count; ++i)
2144 {
2145 if (TREE_CODE (cur_type) == POINTER_TYPE)
2146 {
2147 cur_type = TREE_TYPE (cur_type);
2148 if (cur_type == error_mark_node)
2149 break;
2150
2151 /* Check for writing through a NULL pointer. */
2152 if (types->writing_in_flag
2153 && i == 0
2154 && cur_param != 0
2155 && integer_zerop (cur_param))
3176a0c2
DD		 2156 warning (OPT_Wformat, "writing through null pointer "
2157 "(argument %d)", arg_num);
1312c143
JM		 2158
2159 /* Check for reading through a NULL pointer. */
2160 if (types->reading_from_flag
2161 && i == 0
2162 && cur_param != 0
2163 && integer_zerop (cur_param))
3176a0c2
DD		 2164 warning (OPT_Wformat, "reading through null pointer "
2165 "(argument %d)", arg_num);
1312c143
JM		 2166
2167 if (cur_param != 0 && TREE_CODE (cur_param) == ADDR_EXPR)
2168 cur_param = TREE_OPERAND (cur_param, 0);
2169 else
2170 cur_param = 0;
2171
2172 /* See if this is an attempt to write into a const type with
2173 scanf or with printf "%n". Note: the writing in happens
2174 at the first indirection only, if for example
2175 void * const * is passed to scanf %p; passing
2176 const void ** is simply passing an incompatible type. */
2177 if (types->writing_in_flag
2178 && i == 0
2179 && (TYPE_READONLY (cur_type)
2180 || (cur_param != 0
6615c446 2181 && (CONSTANT_CLASS_P (cur_param)
1312c143
JM		 2182 || (DECL_P (cur_param)
2183 && TREE_READONLY (cur_param))))))
3176a0c2
DD		 2184 warning (OPT_Wformat, "writing into constant object "
2185 "(argument %d)", arg_num);
1312c143
JM		 2186
2187 /* If there are extra type qualifiers beyond the first
2188 indirection, then this makes the types technically
2189 incompatible. */
2190 if (i > 0
2191 && pedantic
2192 && (TYPE_READONLY (cur_type)
2193 || TYPE_VOLATILE (cur_type)
2194 || TYPE_RESTRICT (cur_type)))
3176a0c2
DD		 2195 warning (OPT_Wformat, "extra type qualifiers in format "
2196 "argument (argument %d)",
1312c143
JM		 2197 arg_num);
2198
2199 }
2200 else
2201 {
ede1a387
JM		 2202 format_type_warning (types->name, format_start, format_length,
2203 wanted_type, types->pointer_count,
2204 types->wanted_type_name, orig_cur_type,
2205 arg_num);
1312c143
JM		 2206 break;
2207 }
2208 }
2209
2210 if (i < types->pointer_count)
2211 continue;
2212
1312c143
JM		 2213 cur_type = TYPE_MAIN_VARIANT (cur_type);
2214
2215 /* Check whether the argument type is a character type. This leniency
2216 only applies to certain formats, flagged with 'c'.
2217 */
2218 if (types->char_lenient_flag)
2219 char_type_flag = (cur_type == char_type_node
2220 || cur_type == signed_char_type_node
2221 || cur_type == unsigned_char_type_node);
2222
2223 /* Check the type of the "real" argument, if there's a type we want. */
02f8406b 2224 if (lang_hooks.types_compatible_p (wanted_type, cur_type))
1312c143 2225 continue;
971801ff 2226 /* If we want 'void *', allow any pointer type.
1312c143
JM		 2227 (Anything else would already have got a warning.)
2228 With -pedantic, only allow pointers to void and to character
2229 types. */
2230 if (wanted_type == void_type_node
2231 && (!pedantic || (i == 1 && char_type_flag)))
2232 continue;
2233 /* Don't warn about differences merely in signedness, unless
2234 -pedantic. With -pedantic, warn if the type is a pointer
2235 target and not a character type, and for character types at
2236 a second level of indirection. */
2237 if (TREE_CODE (wanted_type) == INTEGER_TYPE
2238 && TREE_CODE (cur_type) == INTEGER_TYPE
3f75a254 2239 && (!pedantic || i == 0 || (i == 1 && char_type_flag))
8df83eae 2240 && (TYPE_UNSIGNED (wanted_type)
ceef8ce4
NB		 2241 ? wanted_type == c_common_unsigned_type (cur_type)
2242 : wanted_type == c_common_signed_type (cur_type)))
1312c143
JM		 2243 continue;
2244 /* Likewise, "signed char", "unsigned char" and "char" are
2245 equivalent but the above test won't consider them equivalent. */
2246 if (wanted_type == char_type_node
3f75a254 2247 && (!pedantic || i < 2)
1312c143
JM		 2248 && char_type_flag)
2249 continue;
2250 /* Now we have a type mismatch. */
ede1a387
JM		 2251 format_type_warning (types->name, format_start, format_length,
2252 wanted_type, types->pointer_count,
2253 types->wanted_type_name, orig_cur_type, arg_num);
2254 }
2255}
1312c143 2256
1312c143 2257
ede1a387
JM		 2258/* Give a warning about a format argument of different type from that
2259 expected. DESCR is a description such as "field precision", or
2260 NULL for an ordinary format. For an ordinary format, FORMAT_START
2261 points to where the format starts in the format string and
2262 FORMAT_LENGTH is its length. WANTED_TYPE is the type the argument
2263 should have after POINTER_COUNT pointer dereferences.
2264 WANTED_NAME_NAME is a possibly more friendly name of WANTED_TYPE,
2265 or NULL if the ordinary name of the type should be used. ARG_TYPE
2266 is the type of the actual argument. ARG_NUM is the number of that
2267 argument. */
2268static void
2269format_type_warning (const char *descr, const char *format_start,
2270 int format_length, tree wanted_type, int pointer_count,
2271 const char *wanted_type_name, tree arg_type, int arg_num)
2272{
2273 char *p;
2274 /* If ARG_TYPE is a typedef with a misleading name (for example,
2275 size_t but not the standard size_t expected by printf %zu), avoid
2276 printing the typedef name. */
2277 if (wanted_type_name
2278 && TYPE_NAME (arg_type)
2279 && TREE_CODE (TYPE_NAME (arg_type)) == TYPE_DECL
2280 && DECL_NAME (TYPE_NAME (arg_type))
2281 && !strcmp (wanted_type_name,
2282 lang_hooks.decl_printable_name (TYPE_NAME (arg_type), 2)))
2283 arg_type = TYPE_MAIN_VARIANT (arg_type);
2284 /* The format type and name exclude any '*' for pointers, so those
2285 must be formatted manually. For all the types we currently have,
2286 this is adequate, but formats taking pointers to functions or
2287 arrays would require the full type to be built up in order to
2288 print it with %T. */
cceb1885 2289 p = (char *) alloca (pointer_count + 2);
ede1a387
JM		 2290 if (pointer_count == 0)
2291 p[0] = 0;
2292 else if (c_dialect_cxx ())
2293 {
2294 memset (p, '*', pointer_count);
2295 p[pointer_count] = 0;
2296 }
2297 else
2298 {
2299 p[0] = ' ';
2300 memset (p + 1, '*', pointer_count);
2301 p[pointer_count + 1] = 0;
2302 }
2303 if (wanted_type_name)
2304 {
2305 if (descr)
3176a0c2
DD		 2306 warning (OPT_Wformat, "%s should have type %<%s%s%>, "
2307 "but argument %d has type %qT",
ede1a387
JM		 2308 descr, wanted_type_name, p, arg_num, arg_type);
2309 else
3176a0c2
DD		 2310 warning (OPT_Wformat, "format %q.*s expects type %<%s%s%>, "
2311 "but argument %d has type %qT",
ede1a387
JM		 2312 format_length, format_start, wanted_type_name, p,
2313 arg_num, arg_type);
2314 }
2315 else
2316 {
2317 if (descr)
3176a0c2
DD		 2318 warning (OPT_Wformat, "%s should have type %<%T%s%>, "
2319 "but argument %d has type %qT",
ede1a387
JM		 2320 descr, wanted_type, p, arg_num, arg_type);
2321 else
3176a0c2
DD		 2322 warning (OPT_Wformat, "format %q.*s expects type %<%T%s%>, "
2323 "but argument %d has type %qT",
ede1a387 2324 format_length, format_start, wanted_type, p, arg_num, arg_type);
1312c143
JM		 2325 }
2326}
3ae1d4c2 2327
ede1a387 2328
280c1e0d
KG		 2329/* Given a format_char_info array FCI, and a character C, this function
2330 returns the index into the conversion_specs where that specifier's
535a42b1 2331 data is located. The character must exist. */
280c1e0d
KG		 2332static unsigned int
2333find_char_info_specifier_index (const format_char_info *fci, int c)
2334{
366de0ce
NS		 2335 unsigned i;
2336
2337 for (i = 0; fci->format_chars; i++, fci++)
2338 if (strchr (fci->format_chars, c))
2339 return i;
280c1e0d
KG		 2340
2341 /* We shouldn't be looking for a non-existent specifier. */
366de0ce 2342 gcc_unreachable ();
280c1e0d
KG		 2343}
2344
89d09f83
KG		 2345/* Given a format_length_info array FLI, and a character C, this
2346 function returns the index into the conversion_specs where that
535a42b1 2347 modifier's data is located. The character must exist. */
89d09f83
KG		 2348static unsigned int
2349find_length_info_modifier_index (const format_length_info *fli, int c)
2350{
366de0ce
NS		 2351 unsigned i;
2352
2353 for (i = 0; fli->name; i++, fli++)
2354 if (strchr (fli->name, c))
2355 return i;
89d09f83
KG		 2356
2357 /* We shouldn't be looking for a non-existent modifier. */
366de0ce 2358 gcc_unreachable ();
89d09f83
KG		 2359}
2360
2361/* Determine the type of HOST_WIDE_INT in the code being compiled for
2362 use in GCC's __asm_fprintf__ custom format attribute. You must
2363 have set dynamic_format_types before calling this function. */
2364static void
2365init_dynamic_asm_fprintf_info (void)
2366{
2367 static tree hwi;
366de0ce 2368
89d09f83
KG		 2369 if (!hwi)
2370 {
2371 format_length_info *new_asm_fprintf_length_specs;
2372 unsigned int i;
2373
2374 /* Find the underlying type for HOST_WIDE_INT. For the %w
2375 length modifier to work, one must have issued: "typedef
2376 HOST_WIDE_INT __gcc_host_wide_int__;" in one's source code
2377 prior to using that modifier. */
366de0ce 2378 hwi = maybe_get_identifier ("__gcc_host_wide_int__");
5e49f16b
JM		 2379 if (!hwi)
2380 {
2381 error ("%<__gcc_host_wide_int__%> is not defined as a type");
2382 return;
2383 }
2384 hwi = identifier_global_value (hwi);
2385 if (!hwi || TREE_CODE (hwi) != TYPE_DECL)
2386 {
2387 error ("%<__gcc_host_wide_int__%> is not defined as a type");
2388 return;
2389 }
2390 hwi = DECL_ORIGINAL_TYPE (hwi);
366de0ce 2391 gcc_assert (hwi);
5e49f16b
JM		 2392 if (hwi != long_integer_type_node && hwi != long_long_integer_type_node)
2393 {
2394 error ("%<__gcc_host_wide_int__%> is not defined as %<long%>"
2395 " or %<long long%>");
2396 return;
2397 }
89d09f83
KG		 2398
2399 /* Create a new (writable) copy of asm_fprintf_length_specs. */
28dab132
BI		 2400 new_asm_fprintf_length_specs = (format_length_info *)
2401 xmemdup (asm_fprintf_length_specs,
89d09f83
KG		 2402 sizeof (asm_fprintf_length_specs),
2403 sizeof (asm_fprintf_length_specs));
2404
2405 /* HOST_WIDE_INT must be one of 'long' or 'long long'. */
2406 i = find_length_info_modifier_index (new_asm_fprintf_length_specs, 'w');
2407 if (hwi == long_integer_type_node)
2408 new_asm_fprintf_length_specs[i].index = FMT_LEN_l;
2409 else if (hwi == long_long_integer_type_node)
2410 new_asm_fprintf_length_specs[i].index = FMT_LEN_ll;
2411 else
366de0ce 2412 gcc_unreachable ();
89d09f83
KG		 2413
2414 /* Assign the new data for use. */
2415 dynamic_format_types[asm_fprintf_format_type].length_char_specs =
2416 new_asm_fprintf_length_specs;
2417 }
2418}
2419
0ce0154c
KG		 2420/* Determine the type of a "locus" in the code being compiled for use
2421 in GCC's __gcc_gfc__ custom format attribute. You must have set
2422 dynamic_format_types before calling this function. */
2423static void
2424init_dynamic_gfc_info (void)
2425{
2426 static tree locus;
2427
2428 if (!locus)
2429 {
2430 static format_char_info *gfc_fci;
2431
2432 /* For the GCC __gcc_gfc__ custom format specifier to work, one
2433 must have declared 'locus' prior to using this attribute. If
2434 we haven't seen this declarations then you shouldn't use the
2435 specifier requiring that type. */
2436 if ((locus = maybe_get_identifier ("locus")))
2437 {
2438 locus = identifier_global_value (locus);
2439 if (locus)
2440 {
2441 if (TREE_CODE (locus) != TYPE_DECL)
2442 {
2443 error ("%<locus%> is not defined as a type");
2444 locus = 0;
2445 }
2446 else
2447 locus = TREE_TYPE (locus);
2448 }
2449 }
2450
2451 /* Assign the new data for use. */
2452
2453 /* Handle the __gcc_gfc__ format specifics. */
2454 if (!gfc_fci)
2455 dynamic_format_types[gcc_gfc_format_type].conversion_specs =
2456 gfc_fci = (format_char_info *)
2457 xmemdup (gcc_gfc_char_table,
2458 sizeof (gcc_gfc_char_table),
2459 sizeof (gcc_gfc_char_table));
2460 if (locus)
2461 {
2462 const unsigned i = find_char_info_specifier_index (gfc_fci, 'L');
2463 gfc_fci[i].types[0].type = &locus;
2464 gfc_fci[i].pointer_count = 1;
2465 }
2466 }
2467}
2468
280c1e0d
KG		 2469/* Determine the types of "tree" and "location_t" in the code being
2470 compiled for use in GCC's diagnostic custom format attributes. You
2471 must have set dynamic_format_types before calling this function. */
2472static void
2473init_dynamic_diag_info (void)
2474{
2475 static tree t, loc, hwi;
28dab132 2476
280c1e0d
KG		 2477 if (!loc || !t || !hwi)
2478 {
ea40ba9c 2479 static format_char_info *diag_fci, *tdiag_fci, *cdiag_fci, *cxxdiag_fci;
280c1e0d
KG		 2480 static format_length_info *diag_ls;
2481 unsigned int i;
2482
2483 /* For the GCC-diagnostics custom format specifiers to work, one
971801ff 2484 must have declared 'tree' and/or 'location_t' prior to using
280c1e0d
KG		 2485 those attributes. If we haven't seen these declarations then
2486 you shouldn't use the specifiers requiring these types.
2487 However we don't force a hard ICE because we may see only one
2488 or the other type. */
2489 if ((loc = maybe_get_identifier ("location_t")))
5e49f16b
JM		 2490 {
2491 loc = identifier_global_value (loc);
2492 if (loc)
2493 {
2494 if (TREE_CODE (loc) != TYPE_DECL)
2495 {
2496 error ("%<location_t%> is not defined as a type");
2497 loc = 0;
2498 }
2499 else
2500 loc = TREE_TYPE (loc);
2501 }
2502 }
280c1e0d 2503
971801ff 2504 /* We need to grab the underlying 'union tree_node' so peek into
280c1e0d
KG		 2505 an extra type level. */
2506 if ((t = maybe_get_identifier ("tree")))
5e49f16b
JM		 2507 {
2508 t = identifier_global_value (t);
2509 if (t)
2510 {
2511 if (TREE_CODE (t) != TYPE_DECL)
2512 {
2513 error ("%<tree%> is not defined as a type");
2514 t = 0;
2515 }
2516 else if (TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE)
2517 {
2518 error ("%<tree%> is not defined as a pointer type");
2519 t = 0;
2520 }
2521 else
2522 t = TREE_TYPE (TREE_TYPE (t));
2523 }
2524 }
280c1e0d
KG		 2525
2526 /* Find the underlying type for HOST_WIDE_INT. For the %w
2527 length modifier to work, one must have issued: "typedef
2528 HOST_WIDE_INT __gcc_host_wide_int__;" in one's source code
2529 prior to using that modifier. */
2530 if ((hwi = maybe_get_identifier ("__gcc_host_wide_int__")))
5e49f16b
JM		 2531 {
2532 hwi = identifier_global_value (hwi);
2533 if (hwi)
2534 {
2535 if (TREE_CODE (hwi) != TYPE_DECL)
2536 {
2537 error ("%<__gcc_host_wide_int__%> is not defined as a type");
2538 hwi = 0;
2539 }
2540 else
2541 {
2542 hwi = DECL_ORIGINAL_TYPE (hwi);
2543 gcc_assert (hwi);
2544 if (hwi != long_integer_type_node
2545 && hwi != long_long_integer_type_node)
2546 {
2547 error ("%<__gcc_host_wide_int__%> is not defined"
2548 " as %<long%> or %<long long%>");
2549 hwi = 0;
2550 }
2551 }
2552 }
2553 }
280c1e0d
KG		 2554
2555 /* Assign the new data for use. */
2556
2557 /* All the GCC diag formats use the same length specs. */
3f75a254 2558 if (!diag_ls)
280c1e0d 2559 dynamic_format_types[gcc_diag_format_type].length_char_specs =
ea40ba9c 2560 dynamic_format_types[gcc_tdiag_format_type].length_char_specs =
280c1e0d
KG		 2561 dynamic_format_types[gcc_cdiag_format_type].length_char_specs =
2562 dynamic_format_types[gcc_cxxdiag_format_type].length_char_specs =
28dab132
BI		 2563 diag_ls = (format_length_info *)
2564 xmemdup (gcc_diag_length_specs,
280c1e0d
KG		 2565 sizeof (gcc_diag_length_specs),
2566 sizeof (gcc_diag_length_specs));
2567 if (hwi)
2568 {
2569 /* HOST_WIDE_INT must be one of 'long' or 'long long'. */
2570 i = find_length_info_modifier_index (diag_ls, 'w');
2571 if (hwi == long_integer_type_node)
2572 diag_ls[i].index = FMT_LEN_l;
2573 else if (hwi == long_long_integer_type_node)
2574 diag_ls[i].index = FMT_LEN_ll;
2575 else
366de0ce 2576 gcc_unreachable ();
280c1e0d
KG		 2577 }
2578
2579 /* Handle the __gcc_diag__ format specifics. */
3f75a254 2580 if (!diag_fci)
280c1e0d 2581 dynamic_format_types[gcc_diag_format_type].conversion_specs =
28dab132
BI		 2582 diag_fci = (format_char_info *)
2583 xmemdup (gcc_diag_char_table,
3f75a254
JM		 2584 sizeof (gcc_diag_char_table),
2585 sizeof (gcc_diag_char_table));
280c1e0d
KG		 2586 if (loc)
2587 {
2588 i = find_char_info_specifier_index (diag_fci, 'H');
2589 diag_fci[i].types[0].type = &loc;
2590 diag_fci[i].pointer_count = 1;
2591 }
ddd2d57e
RH		 2592 if (t)
2593 {
2594 i = find_char_info_specifier_index (diag_fci, 'J');
2595 diag_fci[i].types[0].type = &t;
2596 diag_fci[i].pointer_count = 1;
2597 }
280c1e0d 2598
ea40ba9c
JM		 2599 /* Handle the __gcc_tdiag__ format specifics. */
2600 if (!tdiag_fci)
2601 dynamic_format_types[gcc_tdiag_format_type].conversion_specs =
2602 tdiag_fci = (format_char_info *)
2603 xmemdup (gcc_tdiag_char_table,
2604 sizeof (gcc_tdiag_char_table),
2605 sizeof (gcc_tdiag_char_table));
2606 if (loc)
2607 {
2608 i = find_char_info_specifier_index (tdiag_fci, 'H');
2609 tdiag_fci[i].types[0].type = &loc;
2610 tdiag_fci[i].pointer_count = 1;
2611 }
2612 if (t)
2613 {
2614 /* All specifiers taking a tree share the same struct. */
2615 i = find_char_info_specifier_index (tdiag_fci, 'D');
2616 tdiag_fci[i].types[0].type = &t;
2617 tdiag_fci[i].pointer_count = 1;
2618 i = find_char_info_specifier_index (tdiag_fci, 'J');
2619 tdiag_fci[i].types[0].type = &t;
2620 tdiag_fci[i].pointer_count = 1;
2621 }
2622
280c1e0d 2623 /* Handle the __gcc_cdiag__ format specifics. */
3f75a254 2624 if (!cdiag_fci)
280c1e0d 2625 dynamic_format_types[gcc_cdiag_format_type].conversion_specs =
28dab132
BI		 2626 cdiag_fci = (format_char_info *)
2627 xmemdup (gcc_cdiag_char_table,
3f75a254
JM		 2628 sizeof (gcc_cdiag_char_table),
2629 sizeof (gcc_cdiag_char_table));
280c1e0d
KG		 2630 if (loc)
2631 {
2632 i = find_char_info_specifier_index (cdiag_fci, 'H');
2633 cdiag_fci[i].types[0].type = &loc;
2634 cdiag_fci[i].pointer_count = 1;
2635 }
2636 if (t)
2637 {
4ed43216 2638 /* All specifiers taking a tree share the same struct. */
280c1e0d
KG		 2639 i = find_char_info_specifier_index (cdiag_fci, 'D');
2640 cdiag_fci[i].types[0].type = &t;
2641 cdiag_fci[i].pointer_count = 1;
ddd2d57e
RH		 2642 i = find_char_info_specifier_index (cdiag_fci, 'J');
2643 cdiag_fci[i].types[0].type = &t;
2644 cdiag_fci[i].pointer_count = 1;
280c1e0d
KG		 2645 }
2646
2647 /* Handle the __gcc_cxxdiag__ format specifics. */
3f75a254 2648 if (!cxxdiag_fci)
280c1e0d 2649 dynamic_format_types[gcc_cxxdiag_format_type].conversion_specs =
28dab132
BI		 2650 cxxdiag_fci = (format_char_info *)
2651 xmemdup (gcc_cxxdiag_char_table,
3f75a254
JM		 2652 sizeof (gcc_cxxdiag_char_table),
2653 sizeof (gcc_cxxdiag_char_table));
280c1e0d
KG		 2654 if (loc)
2655 {
2656 i = find_char_info_specifier_index (cxxdiag_fci, 'H');
2657 cxxdiag_fci[i].types[0].type = &loc;
2658 cxxdiag_fci[i].pointer_count = 1;
2659 }
2660 if (t)
2661 {
4ed43216 2662 /* All specifiers taking a tree share the same struct. */
280c1e0d
KG		 2663 i = find_char_info_specifier_index (cxxdiag_fci, 'D');
2664 cxxdiag_fci[i].types[0].type = &t;
2665 cxxdiag_fci[i].pointer_count = 1;
ddd2d57e
RH		 2666 i = find_char_info_specifier_index (cxxdiag_fci, 'J');
2667 cxxdiag_fci[i].types[0].type = &t;
2668 cxxdiag_fci[i].pointer_count = 1;
280c1e0d
KG		 2669 }
2670 }
2671}
2672
a2bec818
DJ		 2673#ifdef TARGET_FORMAT_TYPES
2674extern const format_kind_info TARGET_FORMAT_TYPES[];
2675#endif
2676
3ae1d4c2
KG		 2677/* Handle a "format" attribute; arguments as in
2678 struct attribute_spec.handler. */
2679tree
e18476eb 2680handle_format_attribute (tree *node, tree ARG_UNUSED (name), tree args,
3a947669 2681 int flags, bool *no_add_attrs)
3ae1d4c2
KG		 2682{
2683 tree type = *node;
2684 function_format_info info;
2685 tree argument;
3ae1d4c2 2686
a2bec818
DJ		 2687#ifdef TARGET_FORMAT_TYPES
2688 /* If the target provides additional format types, we need to
2689 add them to FORMAT_TYPES at first use. */
2690 if (TARGET_FORMAT_TYPES != NULL && !dynamic_format_types)
2691 {
2692 dynamic_format_types = xmalloc ((n_format_types + TARGET_N_FORMAT_TYPES)
2693 * sizeof (dynamic_format_types[0]));
2694 memcpy (dynamic_format_types, format_types_orig,
2695 sizeof (format_types_orig));
2696 memcpy (&dynamic_format_types[n_format_types], TARGET_FORMAT_TYPES,
2697 TARGET_N_FORMAT_TYPES * sizeof (dynamic_format_types[0]));
2698
2699 format_types = dynamic_format_types;
2700 n_format_types += TARGET_N_FORMAT_TYPES;
2701 }
2702#endif
2703
3ae1d4c2
KG		 2704 if (!decode_format_attr (args, &info, 0))
2705 {
2706 *no_add_attrs = true;
2707 return NULL_TREE;
2708 }
2709
3ae1d4c2
KG		 2710 argument = TYPE_ARG_TYPES (type);
2711 if (argument)
2712 {
75b2a93c
OS		 2713 if (!check_format_string (argument, info.format_num, flags,
2714 no_add_attrs))
2715 return NULL_TREE;
3ae1d4c2 2716
75b2a93c 2717 if (info.first_arg_num != 0)
3ae1d4c2 2718 {
75b2a93c
OS		 2719 unsigned HOST_WIDE_INT arg_num = 1;
2720
3ae1d4c2
KG		 2721 /* Verify that first_arg_num points to the last arg,
2722 the ... */
2723 while (argument)
2724 arg_num++, argument = TREE_CHAIN (argument);
2725
2726 if (arg_num != info.first_arg_num)
2727 {
2728 if (!(flags & (int) ATTR_FLAG_BUILT_IN))
9e637a26 2729 error ("args to be formatted is not %<...%>");
3ae1d4c2
KG		 2730 *no_add_attrs = true;
2731 return NULL_TREE;
2732 }
2733 }
2734 }
2735
2736 if (info.format_type == strftime_format_type && info.first_arg_num != 0)
2737 {
2738 error ("strftime formats cannot format arguments");
2739 *no_add_attrs = true;
2740 return NULL_TREE;
2741 }
2742
280c1e0d
KG		 2743 /* If this is a custom GCC-internal format type, we have to
2744 initialize certain bits a runtime. */
2745 if (info.format_type == asm_fprintf_format_type
0ce0154c 2746 || info.format_type == gcc_gfc_format_type
280c1e0d 2747 || info.format_type == gcc_diag_format_type
ea40ba9c 2748 || info.format_type == gcc_tdiag_format_type
280c1e0d
KG		 2749 || info.format_type == gcc_cdiag_format_type
2750 || info.format_type == gcc_cxxdiag_format_type)
3ae1d4c2 2751 {
89d09f83
KG		 2752 /* Our first time through, we have to make sure that our
2753 format_type data is allocated dynamically and is modifiable. */
2754 if (!dynamic_format_types)
28dab132 2755 format_types = dynamic_format_types = (format_kind_info *)
89d09f83
KG		 2756 xmemdup (format_types_orig, sizeof (format_types_orig),
2757 sizeof (format_types_orig));
2758
280c1e0d
KG		 2759 /* If this is format __asm_fprintf__, we have to initialize
2760 GCC's notion of HOST_WIDE_INT for checking %wd. */
2761 if (info.format_type == asm_fprintf_format_type)
3f75a254 2762 init_dynamic_asm_fprintf_info ();
0ce0154c
KG		 2763 /* If this is format __gcc_gfc__, we have to initialize GCC's
2764 notion of 'locus' at runtime for %L. */
2765 else if (info.format_type == gcc_gfc_format_type)
2766 init_dynamic_gfc_info ();
280c1e0d 2767 /* If this is one of the diagnostic attributes, then we have to
971801ff 2768 initialize 'location_t' and 'tree' at runtime. */
280c1e0d 2769 else if (info.format_type == gcc_diag_format_type
ea40ba9c 2770 || info.format_type == gcc_tdiag_format_type
280c1e0d
KG		 2771 || info.format_type == gcc_cdiag_format_type
2772 || info.format_type == gcc_cxxdiag_format_type)
3f75a254 2773 init_dynamic_diag_info ();
280c1e0d 2774 else
3f75a254 2775 gcc_unreachable ();
3ae1d4c2
KG		 2776 }
2777
2778 return NULL_TREE;
2779}
Mirror of https://gcc.gnu.org/git/gcc.git