X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/45aa0550a1af29ab39c005a956ca39223815df9b..62e5fc6ac9bd59f801ca43e7eb81d19960f3e306:/src/system.h diff --git a/src/system.h b/src/system.h index 068b308a..e3f17d89 100644 --- a/src/system.h +++ b/src/system.h @@ -1,11 +1,11 @@ /* System-dependent definitions for Bison. - Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc. + Copyright (C) 2000-2007, 2009-2012 Free Software Foundation, Inc. - This program is free software; you can redistribute it and/or modify + 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 @@ -13,193 +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 - -#if HAVE_CONFIG_H -# include -#endif - -#include -#include - -/* Verify a requirement at compile-time (unlike assert, which is runtime). */ -#define verify(name, assertion) struct name {char name[(assertion) ? 1 : -1];} - -#if HAVE_SYS_TYPES_H -# include -#endif +# 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 +# include -#ifndef EXIT_SUCCESS -# define EXIT_SUCCESS 0 -#endif +# if HAVE_SYS_TYPES_H +# include +# endif -#if HAVE_UNISTD_H # include -#endif +# include -#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 */ - -#include - -#if HAVE_UINTPTR_T -# if HAVE_INTTYPES_H -# include -# else -# if HAVE_STDINT_H -# include -# endif -# endif -#else +# 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 - -#include -#define CALLOC(P, N) ((P) = xcalloc (N, sizeof *(P))) -#define MALLOC(P, N) ((P) = xmalloc ((N) * sizeof *(P))) -#define REALLOC(P, N) ((P) = xrealloc (P, (N) * sizeof *(P))) - -/* From xstrndup.c. */ -char *xstrndup (const char *s, size_t n); - - -/*---------------------. -| Missing prototypes. | -`---------------------*/ - -#if defined HAVE_DECL_STPCPY && !HAVE_DECL_STPCPY -char *stpcpy (char *dest, const char *src); -#endif - -#if defined HAVE_DECL_STRCHR && !HAVE_DECL_STRCHR -char *strchr (const char *s, int c); -#endif - -#if defined HAVE_DECL_STRSPN && !HAVE_DECL_STRSPN -size_t strspn (const char *s, const char *accept); -#endif - -#if defined HAVE_DECL_STRNLEN && !HAVE_DECL_STRNLEN -size_t strnlen (const char *s, size_t maxlen); -#endif +# endif -#if defined HAVE_DECL_MEMCHR && !HAVE_DECL_MEMCHR -void *memchr (const void *s, int c, size_t n); -#endif +// Version mismatch. +# define EX_MISMATCH 63 -#if defined HAVE_DECL_MEMRCHR && !HAVE_DECL_MEMRCHR -void *memrchr (const void *s, int c, size_t n); -#endif +/*---------. +| Gnulib. | +`---------*/ +# include +# include +# include /*-----------------. | GCC extensions. | `-----------------*/ -/* Use this to suppress gcc's `...may be used before initialized' - warnings. */ -#ifdef lint -# define IF_LINT(Code) Code -#else -# define IF_LINT(Code) /* empty */ -#endif - -#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 -#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 +# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) +# define __format__ format +# define __printf__ printf +# endif -#ifndef ATTRIBUTE_NORETURN -# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) -#endif +# ifndef ATTRIBUTE_NORETURN +# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) +# endif + +# ifndef ATTRIBUTE_UNUSED +# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +# endif -#ifndef ATTRIBUTE_UNUSED -# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) -#endif +# define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__) /*------. | NLS. | `------*/ -#if HAVE_LOCALE_H # include -#endif -#if !HAVE_SETLOCALE -# define setlocale(Category, Locale) -#endif -#include -#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. | `-----------*/ -#if HAVE_STDBOOL_H # include -#else -# ifndef __bool_true_false_are_defined -# if ! HAVE__BOOL -# ifdef __cplusplus -typedef bool _Bool; -# else -typedef unsigned char _Bool; -# endif -# endif -# define bool _Bool -# define false 0 -# define true 1 -# define __bool_true_false_are_defined 1 -# endif -#endif + + + +/*-------------. +| 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 /*-----------. @@ -210,31 +160,31 @@ typedef unsigned char _Bool; # define obstack_chunk_free free # 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); \ @@ -247,25 +197,17 @@ do { \ | Extensions to use for the output files. | `-----------------------------------------*/ -#ifdef VMS - /* VMS. */ -# define TAB_EXT "_tab" -# define OUTPUT_EXT ".output" -#else /* ! VMS */ -# ifdef MSDOS - /* MS DOS. */ -# define TAB_EXT "_tab" -# define OUTPUT_EXT ".out" -# else /* ! MSDOS */ - /* Standard. */ -# define TAB_EXT ".tab" -# define OUTPUT_EXT ".output" -# endif /* ! MSDOS */ -#endif /* ! VMS */ +# ifndef OUTPUT_EXT +# define OUTPUT_EXT ".output" +# endif -#ifndef DEFAULT_TMPDIR -# define DEFAULT_TMPDIR "/tmp" -#endif +# ifndef TAB_EXT +# define TAB_EXT ".tab" +# endif + +# ifndef DEFAULT_TMPDIR +# define DEFAULT_TMPDIR "/tmp" +# endif @@ -273,13 +215,13 @@ do { \ | 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)