X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/381fb12e1e6c2f028685d102386bc32725d14f48..62e5fc6ac9bd59f801ca43e7eb81d19960f3e306:/src/system.h diff --git a/src/system.h b/src/system.h index 4f95e205..e3f17d89 100644 --- a/src/system.h +++ b/src/system.h @@ -1,10 +1,11 @@ -/* system-dependent definitions for Bison. - Copyright 2000, 2001, 2002 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 @@ -12,175 +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 !defined (__GNUC__) || __GNUC__ < 2 || \ -(__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__ -# define __attribute__(Spec) /* empty */ +# if (! defined __GNUC__ || __GNUC__ < 2 \ + || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__) +# 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 /*-----------. @@ -189,33 +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); \ @@ -223,82 +192,36 @@ do { \ } while (0) -/*---------------------------------. -| Machine-dependencies for Bison. | -`---------------------------------*/ -#ifdef eta10 -# define MAXSHORT 2147483647 -# define MINSHORT -2147483648 -#else -# define MAXSHORT 32767 -# define MINSHORT -32768 -#endif +/*-----------------------------------------. +| Extensions to use for the output files. | +`-----------------------------------------*/ -#if defined (MSDOS) && !defined (__GO32__) -# define BITS_PER_WORD 16 -# define MAXTABLE 16383 -#else -# define BITS_PER_WORD 32 -# define MAXTABLE 32767 -#endif +# ifndef OUTPUT_EXT +# define OUTPUT_EXT ".output" +# 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) +# ifndef TAB_EXT +# define TAB_EXT ".tab" +# endif +# ifndef DEFAULT_TMPDIR +# define DEFAULT_TMPDIR "/tmp" +# endif -/*-----------------------------------------. -| 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 */ - -#ifndef DEFAULT_TMPDIR -# define DEFAULT_TMPDIR "/tmp" -#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) \ +# define LIST_FREE(Type, List) \ do { \ Type *_node, *_next; \ for (_node = List; _node; _node = _next) \ { \ _next = _node->next; \ - XFREE (_node); \ + free (_node); \ } \ } while (0)