X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e1dd105c0a8c27693ded168675165deddeb2521c..0e16927b48c881317a38132923b6f3150802a7d3:/src/system.h
diff --git a/src/system.h b/src/system.h
index 52b8cf7a..d3c544b4 100644
--- a/src/system.h
+++ b/src/system.h
@@ -1,10 +1,11 @@
-/* system-dependent definitions for Bison.
- Copyright 2000, 2001 Free Software Foundation, Inc.
+/* System-dependent definitions for Bison.
- This program is free software; you can redistribute it and/or modify
+ Copyright (C) 2000-2007, 2009-2012 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,174 +13,143 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see . */
#ifndef BISON_SYSTEM_H
-#define BISON_SYSTEM_H
-
-#ifdef HAVE_CONFIG_H
-# include
-#endif
-
-#include
-
-#include
+# define BISON_SYSTEM_H
+
+/* flex 2.5.31 gratutiously defines macros like INT8_MIN. But this
+ runs afoul of pre-C99 compilers that have or
+ , which are included below if available. It also runs
+ afoul of pre-C99 compilers that define these macros in . */
+# if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901
+# undef INT8_MIN
+# undef INT16_MIN
+# undef INT32_MIN
+# undef INT8_MAX
+# undef INT16_MAX
+# undef UINT8_MAX
+# undef INT32_MAX
+# undef UINT16_MAX
+# undef UINT32_MAX
+# endif
-#if HAVE_STDLIB_H
+# include
+# include
# include
-#endif
-
-/* The following test is to work around the gross typo in
- systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
- is defined to 0, not 1. */
-#if !EXIT_FAILURE
-# undef EXIT_FAILURE
-# define EXIT_FAILURE 1
-#endif
-
-#ifndef EXIT_SUCCESS
-# define EXIT_SUCCESS 0
-#endif
-
-#if HAVE_UNISTD_H
-# include
-#endif
-
-#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
# include
-/* An ANSI string.h and pre-ANSI memory.h might conflict. */
-# if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
-# include
-# endif /* not STDC_HEADERS and HAVE_MEMORY_H */
-#else /* not STDC_HEADERS and not HAVE_STRING_H */
-# include
-/* memory.h and strings.h conflict on some systems. */
-#endif /* not STDC_HEADERS and not HAVE_STRING_H */
-
-#if defined(STDC_HEADERS) || defined(HAVE_CTYPE_H)
-# include
-#endif
-
-#include
-#ifndef errno
-extern int errno;
-#endif
-
-/* AIX requires this to be the first thing in the file. */
-#ifndef __GNUC__
-# if HAVE_ALLOCA_H
-# include
-# else
-# ifdef _AIX
- #pragma alloca
-# else
-# ifndef alloca /* predefined by HP cc +Olibcalls */
-char *alloca ();
-# endif
-# endif
-# endif
-#endif
-#ifndef PARAMS
-# if defined PROTOTYPES || defined __STDC__
-# define PARAMS(Args) Args
-# else
-# define PARAMS(Args) ()
+# if HAVE_SYS_TYPES_H
+# include
# endif
-#endif
-# include "xalloc.h"
-
-/* From xstrndup.c. */
-char *xstrndup PARAMS ((const char *s, size_t n));
-
-/*---------------------.
-| Missing prototypes. |
-`---------------------*/
-
-#if !HAVE_DECL_STPCPY
-char *stpcpy PARAMS ((char *dest, const char *src));
-#endif
-
-#if !HAVE_DECL_STRCHR
-char *strchr(const char *s, int c);
-#endif
-
-#if !HAVE_DECL_STRNDUP
-char *strndup PARAMS ((const char *s, size_t size));
-#endif
-
-#if !HAVE_DECL_STRSPN
-size_t strspn(const char *s, const char *accept);
-#endif
+# include
+# include
-#if !HAVE_DECL_STRNLEN
-size_t strnlen PARAMS ((const char *s, size_t maxlen));
-#endif
+# ifndef UINTPTR_MAX
+/* This isn't perfect, but it's good enough for Bison, which needs
+ only to hash pointers. */
+typedef size_t uintptr_t;
+# endif
-#if !HAVE_DECL_MEMCHR
-void *memchr PARAMS ((const void *s, int c, size_t n));
-#endif
+// Version mismatch.
+# define EX_MISMATCH 63
-#if !HAVE_DECL_MEMRCHR
-void *memrchr PARAMS ((const void *s, int c, size_t n));
-#endif
+/*---------.
+| Gnulib. |
+`---------*/
+# include
+# include
+# include
/*-----------------.
| GCC extensions. |
`-----------------*/
-#ifndef __attribute__
+/* Use PACIFY_CC to indicate that Code is unimportant to the logic of Bison
+ but that it is necessary for suppressing compiler warnings. For example,
+ Code might be a variable initializer that's always overwritten before the
+ variable is used.
+
+ PACIFY_CC is intended to be useful only as a comment as it does not alter
+ Code. It is tempting to redefine PACIFY_CC so that it will suppress Code
+ when configuring without --enable-gcc-warnings. However, that would mean
+ that, for maintainers, Bison would compile with potentially less warnings
+ and safer logic than it would for users. Due to the overhead of M4,
+ suppressing Code is unlikely to offer any significant improvement in
+ Bison's performance anyway. */
+# define PACIFY_CC(Code) Code
+
+# ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
-# define __attribute__(Spec) /* empty */
+# if (! defined __GNUC__ || __GNUC__ < 2 \
+ || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
+# define __attribute__(Spec) /* empty */
+# endif
# endif
+
/* The __-protected variants of `format' and `printf' attributes
are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
# define __format__ format
# define __printf__ printf
# endif
-#endif
+# ifndef ATTRIBUTE_NORETURN
+# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
+# endif
+
+# ifndef ATTRIBUTE_UNUSED
+# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+# endif
+
+# define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__)
/*------.
| NLS. |
`------*/
-#ifdef HAVE_LOCALE_H
# include
-#endif
-#ifndef HAVE_SETLOCALE
-# define setlocale(Category, Locale)
-#endif
-
-#include "libgettext.h"
-#define _(Msgid) gettext (Msgid)
-#define N_(Msgid) (Msgid)
-
-/*-------------------------------.
-| Fix broken compilation flags. |
-`-------------------------------*/
-
-#ifndef LOCALEDIR
-# define LOCALEDIR "/usr/local/share/locale"
-#endif
+# include
+# define _(Msgid) gettext (Msgid)
+# define N_(Msgid) (Msgid)
/*-----------.
| Booleans. |
`-----------*/
-#ifndef TRUE
-# define TRUE (1)
-# define FALSE (0)
-#endif
-typedef int bool;
+# include
+
+
+
+/*-------------.
+| Assertions. |
+`-------------*/
+
+/* In the past, Bison defined aver to simply invoke abort in the case of
+ a failed assertion. The rationale was that 's assertions
+ were too heavyweight and could be disabled too easily. See
+ discussions at
+
+ .
+
+ However, normal assert output can be helpful during development and
+ in bug reports from users. Moreover, it's not clear now that
+ 's assertions are significantly heavyweight. Finally, if
+ users want to experiment with disabling assertions, it's debatable
+ whether it's our responsibility to stop them. See discussion
+ starting at
+ .
+
+ For now, we use assert but we call it aver throughout Bison in case
+ we later wish to try another scheme.
+*/
+# include
+# define aver assert
/*-----------.
@@ -188,33 +158,33 @@ typedef int bool;
# define obstack_chunk_alloc xmalloc
# define obstack_chunk_free free
-# include "obstack.h"
+# include
-#define obstack_sgrow(Obs, Str) \
+# define obstack_sgrow(Obs, Str) \
obstack_grow (Obs, Str, strlen (Str))
-#define obstack_fgrow1(Obs, Format, Arg1) \
+# define obstack_fgrow1(Obs, Format, Arg1) \
do { \
char buf[4096]; \
sprintf (buf, Format, Arg1); \
obstack_grow (Obs, buf, strlen (buf)); \
} while (0)
-#define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
+# define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
do { \
char buf[4096]; \
sprintf (buf, Format, Arg1, Arg2); \
obstack_grow (Obs, buf, strlen (buf)); \
} while (0)
-#define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3) \
+# define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3) \
do { \
char buf[4096]; \
sprintf (buf, Format, Arg1, Arg2, Arg3); \
obstack_grow (Obs, buf, strlen (buf)); \
} while (0)
-#define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4) \
+# define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4) \
do { \
char buf[4096]; \
sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4); \
@@ -222,93 +192,43 @@ do { \
} while (0)
-/*---------------------------------.
-| Machine-dependencies for Bison. |
-`---------------------------------*/
-
-#ifdef eta10
-# define MAXSHORT 2147483647
-# define MINSHORT -2147483648
-#else
-# define MAXSHORT 32767
-# define MINSHORT -32768
-#endif
-
-#if defined (MSDOS) && !defined (__GO32__)
-# define BITS_PER_WORD 16
-# define MAXTABLE 16383
-#else
-# define BITS_PER_WORD 32
-# define MAXTABLE 32767
-#endif
-
-#define WORDSIZE(n) (((n) + BITS_PER_WORD - 1) / BITS_PER_WORD)
-#define SETBIT(x, i) ((x)[(i)/BITS_PER_WORD] |= (1<<((i) % BITS_PER_WORD)))
-#define RESETBIT(x, i) ((x)[(i)/BITS_PER_WORD] &= ~(1<<((i) % BITS_PER_WORD)))
-#define BITISSET(x, i) (((x)[(i)/BITS_PER_WORD] & (1<<((i) % BITS_PER_WORD))) != 0)
-
-
-/* Extensions to use for the output files. */
-
-#ifdef VMS
- /* VMS. */
-# define EXT_TAB "_tab"
-# define EXT_OUTPUT ".output"
-# define EXT_STYPE_H "_stype"
-# define EXT_GUARD_C "_guard"
-#else /* ! VMS */
-# ifdef MSDOS
- /* MS DOS. */
-# define EXT_TAB "_tab"
-# define EXT_OUTPUT ".out"
-# define EXT_STYPE_H ".sth"
-# define EXT_GUARD_C ".guc"
-# else /* ! MSDOS */
- /* Standard. */
-# define EXT_TAB ".tab"
-# define EXT_OUTPUT ".output"
-# define EXT_STYPE_H ".stype"
-# define EXT_GUARD_C ".guard"
-# endif /* ! MSDOS */
-#endif /* ! VMS */
-
-#if defined (VMS) & !defined (__VMS_POSIX)
-# ifndef BISON_SIMPLE
-# define BISON_SIMPLE "GNU_BISON:[000000]BISON.SIMPLE"
-# endif
-# ifndef BISON_HAIRY
-# define BISON_HARIRY "GNU_BISON:[000000]BISON.HAIRY"
+
+/*-----------------------------------------.
+| Extensions to use for the output files. |
+`-----------------------------------------*/
+
+# ifndef OUTPUT_EXT
+# define OUTPUT_EXT ".output"
# endif
-#endif
-#if defined (_MSC_VER)
-# ifndef BISON_SIMPLE
-# define BISON_SIMPLE "c:/usr/local/lib/bison.simple"
+# ifndef TAB_EXT
+# define TAB_EXT ".tab"
# endif
-# ifndef BISON_HAIRY
-# define BISON_HAIRY "c:/usr/local/lib/bison.hairy"
+
+# ifndef DEFAULT_TMPDIR
+# define DEFAULT_TMPDIR "/tmp"
# endif
-#endif
-/* As memcpy, but for shorts. */
-#define shortcpy(Dest, Src, Num) \
- memcpy (Dest, Src, Num * sizeof (short))
-/* Free a linked list. */
-#define LIST_FREE(Type, List) \
+/*---------------------.
+| Free a linked list. |
+`---------------------*/
+
+# define LIST_FREE(Type, List) \
do { \
Type *_node, *_next; \
for (_node = List; _node; _node = _next) \
{ \
_next = _node->next; \
- XFREE (_node); \
+ free (_node); \
} \
} while (0)
-/*---------------------------------.
-| Debugging the memory allocator. |
-`---------------------------------*/
+
+/*---------------------------------------------.
+| Debugging memory allocation (must be last). |
+`---------------------------------------------*/
# if WITH_DMALLOC
# define DMALLOC_FUNC_CHECK