X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/930393cf02dbf20ac494ecbccab39b6c19863a8d..a26424642b1de2c5e237cd69a54f12b2f430321f:/src/system.h?ds=inline
diff --git a/src/system.h b/src/system.h
index 002fa810..bf7f59f9 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.
+/* 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
@@ -12,180 +13,137 @@
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
-
-/* 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
+# 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
-#endif
-
-#include
-#include
-
-#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 */
-
-#include
-#ifndef errno
-extern int errno;
-#endif
-
-#include
-
-# include "xalloc.h"
-
-/* From xstrndup.c. */
-char *xstrndup (const char *s, size_t n);
-
-
-/*----------------.
-| Using timevar. |
-`----------------*/
-
-#include "timevar.h"
-extern int time_report;
-
-
-/*---------------------.
-| Missing prototypes. |
-`---------------------*/
-
-#if !HAVE_DECL_STPCPY
-char *stpcpy (char *dest, const char *src);
-#endif
-
-#if !HAVE_DECL_STRCHR
-char *strchr (const char *s, int c);
-#endif
-
-#if !HAVE_DECL_STRSPN
-size_t strspn (const char *s, const char *accept);
-#endif
+# include
+# include
-#if !HAVE_DECL_STRNLEN
-size_t strnlen (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 (const void *s, int c, size_t n);
-#endif
+// Version mismatch.
+# define EX_MISMATCH 63
-#if !HAVE_DECL_MEMRCHR
-void *memrchr (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))
+# 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
/*------.
| NLS. |
`------*/
-#ifdef HAVE_LOCALE_H
# include
-#endif
-#ifndef HAVE_SETLOCALE
-# define setlocale(Category, Locale)
-#endif
-
-#include "gettext.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
/*-----------.
@@ -194,38 +152,52 @@ 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) \
-do { \
- char buf[4096]; \
- sprintf (buf, Format, Arg1); \
- obstack_grow (Obs, buf, strlen (buf)); \
-} while (0)
+/* Output Str escaped for our postprocessing (i.e., escape M4 special
+ characters).
+
+ For instance "[foo]" -> "@{foo@}", "$$" -> "$][$][". */
+
+# define obstack_escape(Obs, Str) \
+ do { \
+ char const *p; \
+ for (p = Str; *p; p++) \
+ switch (*p) \
+ { \
+ case '$': obstack_sgrow (Obs, "$]["); break; \
+ case '@': obstack_sgrow (Obs, "@@" ); break; \
+ case '[': obstack_sgrow (Obs, "@{" ); break; \
+ case ']': obstack_sgrow (Obs, "@}" ); break; \
+ default: obstack_1grow (Obs, *p ); break; \
+ } \
+ } while (0)
-#define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
-do { \
- char buf[4096]; \
- sprintf (buf, Format, Arg1, Arg2); \
- obstack_grow (Obs, buf, strlen (buf)); \
-} while (0)
-#define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3) \
-do { \
- char buf[4096]; \
- sprintf (buf, Format, Arg1, Arg2, Arg3); \
- obstack_grow (Obs, buf, strlen (buf)); \
-} while (0)
+/* Output Str both quoted for M4 (i.e., embed in [[...]]), and escaped
+ for our postprocessing (i.e., escape M4 special characters). If
+ Str is empty (or NULL), output "[]" instead of "[[]]" as it make M4
+ programming easier (m4_ifval can be used).
+
+ For instance "[foo]" -> "[[@{foo@}]]", "$$" -> "[[$][$][]]". */
+
+# define obstack_quote(Obs, Str) \
+ do { \
+ char const* obstack_quote_p = Str; \
+ if (obstack_quote_p && obstack_quote_p[0]) \
+ { \
+ obstack_sgrow (Obs, "[["); \
+ obstack_escape (Obs, obstack_quote_p); \
+ obstack_sgrow (Obs, "]]"); \
+ } \
+ else \
+ obstack_sgrow (Obs, "[]"); \
+ } 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)); \
-} while (0)
@@ -233,25 +205,13 @@ 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 DEFAULT_TMPDIR
-# define DEFAULT_TMPDIR "/tmp"
-#endif
+# ifndef TAB_EXT
+# define TAB_EXT ".tab"
+# endif
@@ -259,15 +219,15 @@ 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); \
- } \
-} while (0)
+# define LIST_FREE(Type, List) \
+ do { \
+ Type *_node, *_next; \
+ for (_node = List; _node; _node = _next) \
+ { \
+ _next = _node->next; \
+ free (_node); \
+ } \
+ } while (0)
/*---------------------------------------------.