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git.ipfire.org Git - thirdparty/gcc.git/blob - gcc/system.h
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1 /* Get common system includes and various definitions and declarations based
3 Copyright (C) 1998, 1999 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC 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, or (at your option)
12 GNU CC 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.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #ifndef __GCC_SYSTEM_H__
24 #define __GCC_SYSTEM_H__
26 /* We must include stdarg.h/varargs.h before stdio.h. */
27 #ifdef ANSI_PROTOTYPES
35 /* Define a generic NULL if one hasn't already been defined. */
40 /* The compiler is not a multi-threaded application and therefore we
41 do not have to use the locking functions.
43 NEED_DECLARATION_PUTC_UNLOCKED actually indicates whether or not
44 the IO code is multi-thread safe by default. If it is not declared,
45 then do not worry about using the _unlocked functions.
47 fputs_unlocked is an extension and needs to be prototyped specially. */
49 #if defined HAVE_PUTC_UNLOCKED && !defined NEED_DECLARATION_PUTC_UNLOCKED
51 # define putc(C, Stream) putc_unlocked (C, Stream)
53 #if defined HAVE_FPUTC_UNLOCKED && !defined NEED_DECLARATION_PUTC_UNLOCKED
55 # define fputc(C, Stream) fputc_unlocked (C, Stream)
57 #if defined HAVE_FPUTS_UNLOCKED && !defined NEED_DECLARATION_PUTC_UNLOCKED
59 # define fputs(String, Stream) fputs_unlocked (String, Stream)
60 # ifdef NEED_DECLARATION_FPUTS_UNLOCKED
61 extern int fputs_unlocked
PROTO (( const char *, FILE *));
67 /* Jim Meyering writes:
69 "... Some ctype macros are valid only for character codes that
70 isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
71 using /bin/cc or gcc but without giving an ansi option). So, all
72 ctype uses should be through macros like ISPRINT... If
73 STDC_HEADERS is defined, then autoconf has verified that the ctype
74 macros don't need to be guarded with references to isascii. ...
75 Defining isascii to 1 should let any compiler worth its salt
76 eliminate the && through constant folding."
80 "... Furthermore, isupper(c) etc. have an undefined result if c is
81 outside the range -1 <= c <= 255. One is tempted to write isupper(c)
82 with c being of type `char', but this is wrong if c is an 8-bit
83 character >= 128 which gets sign-extended to a negative value.
84 The macro ISUPPER protects against this as well." */
86 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII)) || defined(HOST_EBCDIC)
87 # define IN_CTYPE_DOMAIN(c) 1
89 # define IN_CTYPE_DOMAIN(c) isascii(c)
93 # define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
95 # define ISBLANK(c) ((c) == ' ' || (c) == ' \t ' )
98 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
100 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
103 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
104 #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
105 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
106 #define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
107 #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
108 #define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
109 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
110 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
111 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
112 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
114 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
115 - Its arg may be any int or unsigned int; it need not be an unsigned char.
116 - It's guaranteed to evaluate its argument exactly once.
117 - It's typically faster.
118 Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
119 only '0' through '9' are digits. Prefer ISDIGIT to ISDIGIT_LOCALE unless
120 it's important to use the locale's definition of `digit' even when the
121 host does not conform to Posix. */
122 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
124 /* Define a default escape character; its different for EBCDIC. */
126 #define TARGET_ESC 033
129 #ifdef HAVE_SYS_TYPES_H
130 #include <sys/types.h>
139 #ifdef STRING_WITH_STRINGS
141 # include <strings.h>
143 # ifdef HAVE_STRING_H
146 # ifdef HAVE_STRINGS_H
147 # include <strings.h>
160 #ifdef HAVE_SYS_PARAM_H
161 # include <sys/param.h>
168 /* Find HOST_WIDEST_INT and set its bit size, type and print macros.
169 It will be the largest integer mode supported by the host which may
170 (or may not) be larger than HOST_WIDE_INT. This must appear after
171 <limits.h> since we only use `long long' if its bigger than a
172 `long' and also if it is supported by macros in limits.h. For old
173 hosts which don't have a limits.h (and thus won't include it in
174 stage2 cause we don't rerun configure) we assume gcc supports long
175 long.) Note, you won't get these defined if you don't include
176 {ht}config.h before this file to set the HOST_BITS_PER_* macros. */
178 #ifndef HOST_WIDEST_INT
179 # if defined (HOST_BITS_PER_LONG) && defined (HOST_BITS_PER_LONGLONG)
180 # if (HOST_BITS_PER_LONGLONG > HOST_BITS_PER_LONG) && (defined (LONG_LONG_MAX) || defined (LONGLONG_MAX) || defined (LLONG_MAX) || defined (__GNUC__))
181 # define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONGLONG
182 # define HOST_WIDEST_INT long long
183 # define HOST_WIDEST_INT_PRINT_DEC "%lld"
184 # define HOST_WIDEST_INT_PRINT_UNSIGNED "%llu"
185 # define HOST_WIDEST_INT_PRINT_HEX "0x%llx"
187 # define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONG
188 # define HOST_WIDEST_INT long
189 # define HOST_WIDEST_INT_PRINT_DEC "%ld"
190 # define HOST_WIDEST_INT_PRINT_UNSIGNED "%lu"
191 # define HOST_WIDEST_INT_PRINT_HEX "0x%lx"
192 # endif /*(long long>long) && (LONG_LONG_MAX||LONGLONG_MAX||LLONG_MAX||GNUC)*/
193 # endif /* defined(HOST_BITS_PER_LONG) && defined(HOST_BITS_PER_LONGLONG) */
194 #endif /* ! HOST_WIDEST_INT */
196 #ifdef TIME_WITH_SYS_TIME
197 # include <sys/time.h>
201 # include <sys/time.h>
212 # ifdef HAVE_SYS_FILE_H
213 # include <sys/file.h>
235 /* Some systems define these in, e.g., param.h. We undefine these names
236 here to avoid the warnings. We prefer to use our definitions since we
237 know they are correct. */
241 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
242 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
244 #ifdef HAVE_SYS_WAIT_H
245 #include <sys/wait.h>
249 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
252 #define WTERMSIG(S) ((S) & 0x7f)
255 #define WIFEXITED(S) (((S) & 0xff) == 0)
258 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
261 #define WSTOPSIG WEXITSTATUS
268 # ifdef NEED_DECLARATION_BCOPY
269 extern void bcopy ();
271 # else /* ! HAVE_BCOPY */
272 # define bcopy(src,dst,len) memmove((dst),(src),(len))
278 # ifdef NEED_DECLARATION_BCMP
281 # else /* ! HAVE_BCMP */
282 # define bcmp(left,right,len) memcmp ((left),(right),(len))
288 # ifdef NEED_DECLARATION_BZERO
289 extern void bzero ();
291 # else /* ! HAVE_BZERO */
292 # define bzero(dst,len) memset ((dst),0,(len))
298 # ifdef NEED_DECLARATION_INDEX
299 extern char * index ();
301 # else /* ! HAVE_INDEX */
302 # define index strchr
308 # ifdef NEED_DECLARATION_RINDEX
309 extern char * rindex ();
311 # else /* ! HAVE_RINDEX */
312 # define rindex strrchr
316 #ifdef NEED_DECLARATION_ATOF
317 extern double atof ();
320 #ifdef NEED_DECLARATION_ATOL
324 #ifdef NEED_DECLARATION_FREE
328 #ifdef NEED_DECLARATION_GETCWD
329 extern char * getcwd ();
332 #ifdef NEED_DECLARATION_GETENV
333 extern char * getenv ();
336 #ifdef NEED_DECLARATION_GETWD
337 extern char * getwd ();
340 #ifdef NEED_DECLARATION_SBRK
344 #ifdef NEED_DECLARATION_STRSTR
345 extern char * strstr ();
352 #ifdef NEED_DECLARATION_MALLOC
353 extern PTR
malloc ();
356 #ifdef NEED_DECLARATION_CALLOC
357 extern PTR
calloc ();
360 #ifdef NEED_DECLARATION_REALLOC
361 extern PTR
realloc ();
365 # ifdef NEED_DECLARATION_STRERROR
367 extern char * strerror ();
370 #else /* ! HAVE_STRERROR */
372 extern char * sys_errlist
[];
373 #endif /* HAVE_STRERROR */
375 #ifdef HAVE_STRSIGNAL
376 # ifdef NEED_DECLARATION_STRSIGNAL
378 extern char * strsignal ();
381 #else /* ! HAVE_STRSIGNAL */
382 # ifndef SYS_SIGLIST_DECLARED
383 # ifndef NO_SYS_SIGLIST
384 extern char * sys_siglist
[];
387 #endif /* HAVE_STRSIGNAL */
389 #ifdef HAVE_GETRLIMIT
390 # ifdef NEED_DECLARATION_GETRLIMIT
392 extern int getrlimit ();
397 #ifdef HAVE_SETRLIMIT
398 # ifdef NEED_DECLARATION_SETRLIMIT
400 extern int setrlimit ();
405 /* HAVE_VOLATILE only refers to the stage1 compiler. We also check
406 __STDC__ and assume gcc sets it and has volatile in stage >=2. */
407 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
411 #ifdef NEED_DECLARATION_ABORT
412 extern void abort ();
415 /* Define a STRINGIFY macro that's right for ANSI or traditional C.
416 HAVE_CPP_STRINGIFY only refers to the stage1 compiler. Assume that
417 (non-traditional) gcc used in stage2 or later has this feature.
419 Note: if the argument passed to STRINGIFY is itself a macro, eg
420 #define foo bar, STRINGIFY(foo) will produce "foo", not "bar".
421 Although the __STDC__ case could be made to expand this via a layer
422 of indirection, the traditional C case can not do so. Therefore
423 this behavior is not supported. */
425 # if defined(HAVE_CPP_STRINGIFY) || (defined(__GNUC__) && defined(__STDC__))
426 # define STRINGIFY(STRING) #STRING
428 # define STRINGIFY(STRING) "STRING"
430 #endif /* ! STRINGIFY */
433 # include <sys/stat.h>
436 /* Test if something is a normal file. */
438 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
441 /* Test if something is a directory. */
443 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
446 /* Test if something is a character special file. */
448 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
451 /* Test if something is a socket. */
454 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
456 # define S_ISSOCK(m) 0
460 /* Test if something is a FIFO. */
463 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
465 # define S_ISFIFO(m) 0
469 /* Approximate O_NONBLOCK. */
471 #define O_NONBLOCK O_NDELAY
474 /* Approximate O_NOCTTY. */
479 /* Define well known filenos if the system does not define them. */
481 # define STDIN_FILENO 0
483 #ifndef STDOUT_FILENO
484 # define STDOUT_FILENO 1
486 #ifndef STDERR_FILENO
487 # define STDERR_FILENO 2
490 /* Some systems have mkdir that takes a single argument. */
491 #ifdef MKDIR_TAKES_ONE_ARG
492 # define mkdir(a,b) mkdir(a)
495 /* Get libiberty declarations. */
496 #include "libiberty.h"
498 #endif /* __GCC_SYSTEM_H__ */