X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/87aabbff99bf8a90cb4fa2c495f40528337112af..22b081deb7ab1d0ec7a279e5213fa7fdc2c85207:/src/system.h diff --git a/src/system.h b/src/system.h index 1b2459e0..0d69e93e 100644 --- a/src/system.h +++ b/src/system.h @@ -1,10 +1,11 @@ /* System-dependent definitions for Bison. - Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc. - 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 @@ -12,136 +13,91 @@ 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 - -/* AIX requires this to be the first thing in the file. */ -#ifdef __GNUC__ -# define alloca(Size) __builtin_alloca (Size) -#else -# if HAVE_ALLOCA_H -# include -# else -# ifdef _AIX - #pragma alloca -# else -# ifndef alloca /* predefined by HP cc +Olibcalls */ -char *alloca (); -# endif -# endif -# endif +/* 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 -#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 - -#if HAVE_STDLIB_H -# 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 */ - -#include #include +#include +#include +#include -# include "xalloc.h" - -/* From xstrndup.c. */ -char *xstrndup (const char *s, size_t n); +#define STREQ(L, R) (strcmp(L, R) == 0) +#define STRNEQ(L, R) (!STREQ(L, R)) +/* Just like strncmp, but the second argument must be a literal string + and you don't specify the length. */ +#define STRNCMP_LIT(S, Literal) \ + strncmp (S, "" Literal "", sizeof (Literal) - 1) -/*----------------. -| Using timevar. | -`----------------*/ - -#include "timevar.h" -extern int time_report; - - -/*---------------------. -| Missing prototypes. | -`---------------------*/ - -#if defined HAVE_DECL_STPCPY && !HAVE_DECL_STPCPY -char *stpcpy (char *dest, const char *src); -#endif +/* Whether Literal is a prefix of S. */ +#define STRPREFIX_LIT(Literal, S) \ + (STRNCMP_LIT (S, Literal) == 0) -#if defined HAVE_DECL_STRCHR && !HAVE_DECL_STRCHR -char *strchr (const char *s, int c); +#if HAVE_SYS_TYPES_H +# include #endif -#if defined HAVE_DECL_STRSPN && !HAVE_DECL_STRSPN -size_t strspn (const char *s, const char *accept); -#endif +#include +#include -#if defined HAVE_DECL_STRNLEN && !HAVE_DECL_STRNLEN -size_t strnlen (const char *s, size_t maxlen); +#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 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 +/* 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__ +# if (! defined __GNUC__ || __GNUC__ < 2 \ + || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)) # define __attribute__(Spec) /* empty */ # endif #endif @@ -161,79 +117,90 @@ void *memrchr (const void *s, int c, size_t n); # 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 -#include "gettext.h" +#include #define _(Msgid) gettext (Msgid) #define N_(Msgid) (Msgid) -/*-------------------------------. -| Fix broken compilation flags. | -`-------------------------------*/ - -#ifndef LOCALEDIR -# define LOCALEDIR "/usr/local/share/locale" -#endif - - /*-----------. | Booleans. | `-----------*/ -#if HAVE_STDBOOL_H -# include -#else -typedef enum {false = 0, true = 1} bool; -#endif +#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 /*-----------. | Obstacks. | `-----------*/ -# define obstack_chunk_alloc xmalloc -# define obstack_chunk_free free -# include "obstack.h" +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free +#include #define obstack_sgrow(Obs, Str) \ obstack_grow (Obs, Str, strlen (Str)) -#define obstack_fgrow1(Obs, Format, Arg1) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1); \ - obstack_grow (Obs, buf, strlen (buf)); \ +#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) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1, Arg2); \ - obstack_grow (Obs, buf, strlen (buf)); \ +#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) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1, Arg2, Arg3); \ - obstack_grow (Obs, buf, strlen (buf)); \ +#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) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4); \ - obstack_grow (Obs, buf, strlen (buf)); \ +#define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4) \ +do { \ + char buf[4096]; \ + sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4); \ + obstack_grow (Obs, buf, strlen (buf)); \ } while (0) @@ -242,21 +209,13 @@ do { \ | Extensions to use for the output files. | `-----------------------------------------*/ -#ifdef VMS - /* VMS. */ -# define EXT_TAB "_tab" -# define EXT_OUTPUT ".output" -#else /* ! VMS */ -# ifdef MSDOS - /* MS DOS. */ -# define EXT_TAB "_tab" -# define EXT_OUTPUT ".out" -# else /* ! MSDOS */ - /* Standard. */ -# define EXT_TAB ".tab" -# define EXT_OUTPUT ".output" -# endif /* ! MSDOS */ -#endif /* ! VMS */ +#ifndef OUTPUT_EXT +# define OUTPUT_EXT ".output" +#endif + +#ifndef TAB_EXT +# define TAB_EXT ".tab" +#endif #ifndef DEFAULT_TMPDIR # define DEFAULT_TMPDIR "/tmp" @@ -268,14 +227,14 @@ do { \ | Free a linked list. | `---------------------*/ -#define LIST_FREE(Type, List) \ -do { \ - Type *_node, *_next; \ - for (_node = List; _node; _node = _next) \ - { \ - _next = _node->next; \ - XFREE (_node); \ - } \ +#define LIST_FREE(Type, List) \ +do { \ + Type *_node, *_next; \ + for (_node = List; _node; _node = _next) \ + { \ + _next = _node->next; \ + free (_node); \ + } \ } while (0)