Mercurial > hg > CbC > CbC_gcc
annotate include/ansidecl.h @ 63:b7f97abdc517 gcc-4.6-20100522
update gcc from gcc-4.5.0 to gcc-4.6
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 24 May 2010 12:47:05 +0900 |
| parents | 77e2b8dfacca |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* ANSI and traditional C compatability macros |
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2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, |
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3 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 |
| 0 | 4 Free Software Foundation, Inc. |
| 5 This file is part of the GNU C Library. | |
| 6 | |
| 7 This program is free software; you can redistribute it and/or modify | |
| 8 it under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 2 of the License, or | |
| 10 (at your option) any later version. | |
| 11 | |
| 12 This program is distributed in the hope that it will be useful, | |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 GNU General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with this program; if not, write to the Free Software | |
| 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ | |
| 20 | |
| 21 /* ANSI and traditional C compatibility macros | |
| 22 | |
| 23 ANSI C is assumed if __STDC__ is #defined. | |
| 24 | |
| 25 Macro ANSI C definition Traditional C definition | |
| 26 ----- ---- - ---------- ----------- - ---------- | |
| 27 ANSI_PROTOTYPES 1 not defined | |
| 28 PTR `void *' `char *' | |
| 29 PTRCONST `void *const' `char *' | |
| 30 LONG_DOUBLE `long double' `double' | |
| 31 const not defined `' | |
| 32 volatile not defined `' | |
| 33 signed not defined `' | |
| 34 VA_START(ap, var) va_start(ap, var) va_start(ap) | |
| 35 | |
| 36 Note that it is safe to write "void foo();" indicating a function | |
| 37 with no return value, in all K+R compilers we have been able to test. | |
| 38 | |
| 39 For declaring functions with prototypes, we also provide these: | |
| 40 | |
| 41 PARAMS ((prototype)) | |
| 42 -- for functions which take a fixed number of arguments. Use this | |
| 43 when declaring the function. When defining the function, write a | |
| 44 K+R style argument list. For example: | |
| 45 | |
| 46 char *strcpy PARAMS ((char *dest, char *source)); | |
| 47 ... | |
| 48 char * | |
| 49 strcpy (dest, source) | |
| 50 char *dest; | |
| 51 char *source; | |
| 52 { ... } | |
| 53 | |
| 54 | |
| 55 VPARAMS ((prototype, ...)) | |
| 56 -- for functions which take a variable number of arguments. Use | |
| 57 PARAMS to declare the function, VPARAMS to define it. For example: | |
| 58 | |
| 59 int printf PARAMS ((const char *format, ...)); | |
| 60 ... | |
| 61 int | |
| 62 printf VPARAMS ((const char *format, ...)) | |
| 63 { | |
| 64 ... | |
| 65 } | |
| 66 | |
| 67 For writing functions which take variable numbers of arguments, we | |
| 68 also provide the VA_OPEN, VA_CLOSE, and VA_FIXEDARG macros. These | |
| 69 hide the differences between K+R <varargs.h> and C89 <stdarg.h> more | |
| 70 thoroughly than the simple VA_START() macro mentioned above. | |
| 71 | |
| 72 VA_OPEN and VA_CLOSE are used *instead of* va_start and va_end. | |
| 73 Immediately after VA_OPEN, put a sequence of VA_FIXEDARG calls | |
| 74 corresponding to the list of fixed arguments. Then use va_arg | |
| 75 normally to get the variable arguments, or pass your va_list object | |
| 76 around. You do not declare the va_list yourself; VA_OPEN does it | |
| 77 for you. | |
| 78 | |
| 79 Here is a complete example: | |
| 80 | |
| 81 int | |
| 82 printf VPARAMS ((const char *format, ...)) | |
| 83 { | |
| 84 int result; | |
| 85 | |
| 86 VA_OPEN (ap, format); | |
| 87 VA_FIXEDARG (ap, const char *, format); | |
| 88 | |
| 89 result = vfprintf (stdout, format, ap); | |
| 90 VA_CLOSE (ap); | |
| 91 | |
| 92 return result; | |
| 93 } | |
| 94 | |
| 95 | |
| 96 You can declare variables either before or after the VA_OPEN, | |
| 97 VA_FIXEDARG sequence. Also, VA_OPEN and VA_CLOSE are the beginning | |
| 98 and end of a block. They must appear at the same nesting level, | |
| 99 and any variables declared after VA_OPEN go out of scope at | |
| 100 VA_CLOSE. Unfortunately, with a K+R compiler, that includes the | |
| 101 argument list. You can have multiple instances of VA_OPEN/VA_CLOSE | |
| 102 pairs in a single function in case you need to traverse the | |
| 103 argument list more than once. | |
| 104 | |
| 105 For ease of writing code which uses GCC extensions but needs to be | |
| 106 portable to other compilers, we provide the GCC_VERSION macro that | |
| 107 simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various | |
| 108 wrappers around __attribute__. Also, __extension__ will be #defined | |
| 109 to nothing if it doesn't work. See below. | |
| 110 | |
| 111 This header also defines a lot of obsolete macros: | |
| 112 CONST, VOLATILE, SIGNED, PROTO, EXFUN, DEFUN, DEFUN_VOID, | |
| 113 AND, DOTS, NOARGS. Don't use them. */ | |
| 114 | |
| 115 #ifndef _ANSIDECL_H | |
| 116 #define _ANSIDECL_H 1 | |
| 117 | |
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118 #ifdef __cplusplus |
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119 extern "C" { |
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120 #endif |
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121 |
| 0 | 122 /* Every source file includes this file, |
| 123 so they will all get the switch for lint. */ | |
| 124 /* LINTLIBRARY */ | |
| 125 | |
| 126 /* Using MACRO(x,y) in cpp #if conditionals does not work with some | |
| 127 older preprocessors. Thus we can't define something like this: | |
| 128 | |
| 129 #define HAVE_GCC_VERSION(MAJOR, MINOR) \ | |
| 130 (__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR))) | |
| 131 | |
| 132 and then test "#if HAVE_GCC_VERSION(2,7)". | |
| 133 | |
| 134 So instead we use the macro below and test it against specific values. */ | |
| 135 | |
| 136 /* This macro simplifies testing whether we are using gcc, and if it | |
| 137 is of a particular minimum version. (Both major & minor numbers are | |
| 138 significant.) This macro will evaluate to 0 if we are not using | |
| 139 gcc at all. */ | |
| 140 #ifndef GCC_VERSION | |
| 141 #define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) | |
| 142 #endif /* GCC_VERSION */ | |
| 143 | |
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144 #if defined (__STDC__) || defined(__cplusplus) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32) |
| 0 | 145 /* All known AIX compilers implement these things (but don't always |
| 146 define __STDC__). The RISC/OS MIPS compiler defines these things | |
| 147 in SVR4 mode, but does not define __STDC__. */ | |
| 148 /* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other | |
| 149 C++ compilers, does not define __STDC__, though it acts as if this | |
| 150 was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */ | |
| 151 | |
| 152 #define ANSI_PROTOTYPES 1 | |
| 153 #define PTR void * | |
| 154 #define PTRCONST void *const | |
| 155 #define LONG_DOUBLE long double | |
| 156 | |
| 157 /* PARAMS is often defined elsewhere (e.g. by libintl.h), so wrap it in | |
| 158 a #ifndef. */ | |
| 159 #ifndef PARAMS | |
| 160 #define PARAMS(ARGS) ARGS | |
| 161 #endif | |
| 162 | |
| 163 #define VPARAMS(ARGS) ARGS | |
| 164 #define VA_START(VA_LIST, VAR) va_start(VA_LIST, VAR) | |
| 165 | |
| 166 /* variadic function helper macros */ | |
| 167 /* "struct Qdmy" swallows the semicolon after VA_OPEN/VA_FIXEDARG's | |
| 168 use without inhibiting further decls and without declaring an | |
| 169 actual variable. */ | |
| 170 #define VA_OPEN(AP, VAR) { va_list AP; va_start(AP, VAR); { struct Qdmy | |
| 171 #define VA_CLOSE(AP) } va_end(AP); } | |
| 172 #define VA_FIXEDARG(AP, T, N) struct Qdmy | |
| 173 | |
| 174 #undef const | |
| 175 #undef volatile | |
| 176 #undef signed | |
| 177 | |
| 178 /* inline requires special treatment; it's in C99, and GCC >=2.7 supports | |
| 179 it too, but it's not in C89. */ | |
| 180 #undef inline | |
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181 #if __STDC_VERSION__ >= 199901L || defined(__cplusplus) || (defined(__SUNPRO_C) && defined(__C99FEATURES__)) |
| 0 | 182 /* it's a keyword */ |
| 183 #else | |
| 184 # if GCC_VERSION >= 2007 | |
| 185 # define inline __inline__ /* __inline__ prevents -pedantic warnings */ | |
| 186 # else | |
| 187 # define inline /* nothing */ | |
| 188 # endif | |
| 189 #endif | |
| 190 | |
| 191 /* These are obsolete. Do not use. */ | |
| 192 #ifndef IN_GCC | |
| 193 #define CONST const | |
| 194 #define VOLATILE volatile | |
| 195 #define SIGNED signed | |
| 196 | |
| 197 #define PROTO(type, name, arglist) type name arglist | |
| 198 #define EXFUN(name, proto) name proto | |
| 199 #define DEFUN(name, arglist, args) name(args) | |
| 200 #define DEFUN_VOID(name) name(void) | |
| 201 #define AND , | |
| 202 #define DOTS , ... | |
| 203 #define NOARGS void | |
| 204 #endif /* ! IN_GCC */ | |
| 205 | |
| 206 #else /* Not ANSI C. */ | |
| 207 | |
| 208 #undef ANSI_PROTOTYPES | |
| 209 #define PTR char * | |
| 210 #define PTRCONST PTR | |
| 211 #define LONG_DOUBLE double | |
| 212 | |
| 213 #define PARAMS(args) () | |
| 214 #define VPARAMS(args) (va_alist) va_dcl | |
| 215 #define VA_START(va_list, var) va_start(va_list) | |
| 216 | |
| 217 #define VA_OPEN(AP, VAR) { va_list AP; va_start(AP); { struct Qdmy | |
| 218 #define VA_CLOSE(AP) } va_end(AP); } | |
| 219 #define VA_FIXEDARG(AP, TYPE, NAME) TYPE NAME = va_arg(AP, TYPE) | |
| 220 | |
| 221 /* some systems define these in header files for non-ansi mode */ | |
| 222 #undef const | |
| 223 #undef volatile | |
| 224 #undef signed | |
| 225 #undef inline | |
| 226 #define const | |
| 227 #define volatile | |
| 228 #define signed | |
| 229 #define inline | |
| 230 | |
| 231 #ifndef IN_GCC | |
| 232 #define CONST | |
| 233 #define VOLATILE | |
| 234 #define SIGNED | |
| 235 | |
| 236 #define PROTO(type, name, arglist) type name () | |
| 237 #define EXFUN(name, proto) name() | |
| 238 #define DEFUN(name, arglist, args) name arglist args; | |
| 239 #define DEFUN_VOID(name) name() | |
| 240 #define AND ; | |
| 241 #define DOTS | |
| 242 #define NOARGS | |
| 243 #endif /* ! IN_GCC */ | |
| 244 | |
| 245 #endif /* ANSI C. */ | |
| 246 | |
| 247 /* Define macros for some gcc attributes. This permits us to use the | |
| 248 macros freely, and know that they will come into play for the | |
| 249 version of gcc in which they are supported. */ | |
| 250 | |
| 251 #if (GCC_VERSION < 2007) | |
| 252 # define __attribute__(x) | |
| 253 #endif | |
| 254 | |
| 255 /* Attribute __malloc__ on functions was valid as of gcc 2.96. */ | |
| 256 #ifndef ATTRIBUTE_MALLOC | |
| 257 # if (GCC_VERSION >= 2096) | |
| 258 # define ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) | |
| 259 # else | |
| 260 # define ATTRIBUTE_MALLOC | |
| 261 # endif /* GNUC >= 2.96 */ | |
| 262 #endif /* ATTRIBUTE_MALLOC */ | |
| 263 | |
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264 /* Attributes on labels were valid as of gcc 2.93 and g++ 4.5. For |
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265 g++ an attribute on a label must be followed by a semicolon. */ |
| 0 | 266 #ifndef ATTRIBUTE_UNUSED_LABEL |
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267 # ifndef __cplusplus |
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268 # if GCC_VERSION >= 2093 |
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269 # define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED |
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270 # else |
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271 # define ATTRIBUTE_UNUSED_LABEL |
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272 # endif |
| 0 | 273 # else |
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274 # if GCC_VERSION >= 4005 |
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275 # define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED ; |
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276 # else |
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277 # define ATTRIBUTE_UNUSED_LABEL |
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278 # endif |
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279 # endif |
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280 #endif |
| 0 | 281 |
| 282 #ifndef ATTRIBUTE_UNUSED | |
| 283 #define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) | |
| 284 #endif /* ATTRIBUTE_UNUSED */ | |
| 285 | |
| 286 /* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the | |
| 287 identifier name. */ | |
| 288 #if ! defined(__cplusplus) || (GCC_VERSION >= 3004) | |
| 289 # define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED | |
| 290 #else /* !__cplusplus || GNUC >= 3.4 */ | |
| 291 # define ARG_UNUSED(NAME) NAME | |
| 292 #endif /* !__cplusplus || GNUC >= 3.4 */ | |
| 293 | |
| 294 #ifndef ATTRIBUTE_NORETURN | |
| 295 #define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) | |
| 296 #endif /* ATTRIBUTE_NORETURN */ | |
| 297 | |
| 298 /* Attribute `nonnull' was valid as of gcc 3.3. */ | |
| 299 #ifndef ATTRIBUTE_NONNULL | |
| 300 # if (GCC_VERSION >= 3003) | |
| 301 # define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m))) | |
| 302 # else | |
| 303 # define ATTRIBUTE_NONNULL(m) | |
| 304 # endif /* GNUC >= 3.3 */ | |
| 305 #endif /* ATTRIBUTE_NONNULL */ | |
| 306 | |
| 307 /* Attribute `pure' was valid as of gcc 3.0. */ | |
| 308 #ifndef ATTRIBUTE_PURE | |
| 309 # if (GCC_VERSION >= 3000) | |
| 310 # define ATTRIBUTE_PURE __attribute__ ((__pure__)) | |
| 311 # else | |
| 312 # define ATTRIBUTE_PURE | |
| 313 # endif /* GNUC >= 3.0 */ | |
| 314 #endif /* ATTRIBUTE_PURE */ | |
| 315 | |
| 316 /* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL. | |
| 317 This was the case for the `printf' format attribute by itself | |
| 318 before GCC 3.3, but as of 3.3 we need to add the `nonnull' | |
| 319 attribute to retain this behavior. */ | |
| 320 #ifndef ATTRIBUTE_PRINTF | |
| 321 #define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m) | |
| 322 #define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2) | |
| 323 #define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3) | |
| 324 #define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4) | |
| 325 #define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5) | |
| 326 #define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6) | |
| 327 #endif /* ATTRIBUTE_PRINTF */ | |
| 328 | |
| 329 /* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on | |
| 330 a function pointer. Format attributes were allowed on function | |
| 331 pointers as of gcc 3.1. */ | |
| 332 #ifndef ATTRIBUTE_FPTR_PRINTF | |
| 333 # if (GCC_VERSION >= 3001) | |
| 334 # define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n) | |
| 335 # else | |
| 336 # define ATTRIBUTE_FPTR_PRINTF(m, n) | |
| 337 # endif /* GNUC >= 3.1 */ | |
| 338 # define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2) | |
| 339 # define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3) | |
| 340 # define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4) | |
| 341 # define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5) | |
| 342 # define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6) | |
| 343 #endif /* ATTRIBUTE_FPTR_PRINTF */ | |
| 344 | |
| 345 /* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL. A | |
| 346 NULL format specifier was allowed as of gcc 3.3. */ | |
| 347 #ifndef ATTRIBUTE_NULL_PRINTF | |
| 348 # if (GCC_VERSION >= 3003) | |
| 349 # define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) | |
| 350 # else | |
| 351 # define ATTRIBUTE_NULL_PRINTF(m, n) | |
| 352 # endif /* GNUC >= 3.3 */ | |
| 353 # define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2) | |
| 354 # define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3) | |
| 355 # define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4) | |
| 356 # define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5) | |
| 357 # define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6) | |
| 358 #endif /* ATTRIBUTE_NULL_PRINTF */ | |
| 359 | |
| 360 /* Attribute `sentinel' was valid as of gcc 3.5. */ | |
| 361 #ifndef ATTRIBUTE_SENTINEL | |
| 362 # if (GCC_VERSION >= 3005) | |
| 363 # define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__)) | |
| 364 # else | |
| 365 # define ATTRIBUTE_SENTINEL | |
| 366 # endif /* GNUC >= 3.5 */ | |
| 367 #endif /* ATTRIBUTE_SENTINEL */ | |
| 368 | |
| 369 | |
| 370 #ifndef ATTRIBUTE_ALIGNED_ALIGNOF | |
| 371 # if (GCC_VERSION >= 3000) | |
| 372 # define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m)))) | |
| 373 # else | |
| 374 # define ATTRIBUTE_ALIGNED_ALIGNOF(m) | |
| 375 # endif /* GNUC >= 3.0 */ | |
| 376 #endif /* ATTRIBUTE_ALIGNED_ALIGNOF */ | |
| 377 | |
| 378 /* Useful for structures whose layout must much some binary specification | |
| 379 regardless of the alignment and padding qualities of the compiler. */ | |
| 380 #ifndef ATTRIBUTE_PACKED | |
| 381 # define ATTRIBUTE_PACKED __attribute__ ((packed)) | |
| 382 #endif | |
| 383 | |
| 384 /* Attribute `hot' and `cold' was valid as of gcc 4.3. */ | |
| 385 #ifndef ATTRIBUTE_COLD | |
| 386 # if (GCC_VERSION >= 4003) | |
| 387 # define ATTRIBUTE_COLD __attribute__ ((__cold__)) | |
| 388 # else | |
| 389 # define ATTRIBUTE_COLD | |
| 390 # endif /* GNUC >= 4.3 */ | |
| 391 #endif /* ATTRIBUTE_COLD */ | |
| 392 #ifndef ATTRIBUTE_HOT | |
| 393 # if (GCC_VERSION >= 4003) | |
| 394 # define ATTRIBUTE_HOT __attribute__ ((__hot__)) | |
| 395 # else | |
| 396 # define ATTRIBUTE_HOT | |
| 397 # endif /* GNUC >= 4.3 */ | |
| 398 #endif /* ATTRIBUTE_HOT */ | |
| 399 | |
| 400 /* We use __extension__ in some places to suppress -pedantic warnings | |
| 401 about GCC extensions. This feature didn't work properly before | |
| 402 gcc 2.8. */ | |
| 403 #if GCC_VERSION < 2008 | |
| 404 #define __extension__ | |
| 405 #endif | |
| 406 | |
|
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407 /* This is used to declare a const variable which should be visible |
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408 outside of the current compilation unit. Use it as |
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409 EXPORTED_CONST int i = 1; |
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410 This is because the semantics of const are different in C and C++. |
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411 "extern const" is permitted in C but it looks strange, and gcc |
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412 warns about it when -Wc++-compat is not used. */ |
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413 #ifdef __cplusplus |
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414 #define EXPORTED_CONST extern const |
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415 #else |
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416 #define EXPORTED_CONST const |
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417 #endif |
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418 |
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419 #ifdef __cplusplus |
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420 } |
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421 #endif |
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422 |
| 0 | 423 #endif /* ansidecl.h */ |