2007-02-07 Paolo Bonzini <bonzini@gnu.org>

[bison.git] / src / system.h

diff --git a/src/system.h b/src/system.h
index 5d332099c4b316b60f2f98fe2f049d1d43653dba..985bbbeed46349fc647588596e95d03df8418a67 100644 (file)
--- a/src/system.h
+++ b/src/system.h
@@ -1,46 +1,220 @@
-#ifdef MSDOS
-#include <io.h>
+/* System-dependent definitions for Bison.
+
+   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef BISON_SYSTEM_H
+#define BISON_SYSTEM_H
+
+/* flex 2.5.31 gratutiously defines macros like INT8_MIN.  But this
+   runs afoul of pre-C99 compilers that have <inttypes.h> or
+   <stdint.h>, which are included below if available.  It also runs
+   afoul of pre-C99 compilers that define these macros in <limits.h>.  */
+#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
 

-#if defined(HAVE_STDLIB_H) || defined(MSDOS)
+#include <limits.h>
+#include <stddef.h>

 #include <stdlib.h>
 #include <stdlib.h>

+#include <string.h>
+
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>

 #endif
 
 #endif
 

-#if (defined(VMS) || defined(MSDOS)) && !defined(HAVE_STRING_H)
-#define HAVE_STRING_H 1
+#include <unistd.h>
+#include <inttypes.h>
+
+#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
 
 #endif
 

-#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
-#include <string.h>
-/* An ANSI string.h and pre-ANSI memory.h might conflict.  */
-#if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
-#include <memory.h>
-#endif /* not STDC_HEADERS and HAVE_MEMORY_H */
-#ifndef bcopy
-#define bcopy(src, dst, num) memcpy((dst), (src), (num))
+
+/*---------.
+| Gnulib.  |
+`---------*/
+
+#include <unlocked-io.h>
+#include <verify.h>
+#include <xalloc.h>
+
+
+/*-----------------.
+| 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
 #endif

-#else /* not STDC_HEADERS and not HAVE_STRING_H */
-#include <strings.h>
-/* memory.h and strings.h conflict on some systems.  */
-#endif /* not STDC_HEADERS and not HAVE_STRING_H */

 
 

-#if HAVE_LOCALE_H
-# include <locale.h>
+#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 */
+# endif

 #endif
 #endif

-#if !HAVE_SETLOCALE
-# define setlocale(Category, Locale)
+
+/* 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
 

-#if ENABLE_NLS
-# include <libintl.h>
-# define _(Text) gettext (Text)
-#else
-# define bindtextdomain(Domain, Directory)
-# define textdomain(Domain)
-# define _(Text) Text
+#ifndef ATTRIBUTE_NORETURN
+# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))

 #endif
 #endif

-#define N_(Text) Text

 
 

-/* In the meantime, waiting for Automake.  */
-#define PACKAGE "bison"
-#define LOCALEDIR "/usr/local/share/locale"
+#ifndef ATTRIBUTE_UNUSED
+# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#endif
+
+#define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__)
+
+/*------.
+| NLS.  |
+`------*/
+
+#include <locale.h>
+
+#include <gettext.h>
+#define _(Msgid)  gettext (Msgid)
+#define N_(Msgid) (Msgid)
+
+
+/*-----------.
+| Booleans.  |
+`-----------*/
+
+#include <stdbool.h>
+
+
+
+/*-------------.
+| Assertions.  |
+`-------------*/
+
+/* <assert.h>'s assertions are too heavyweight, and can be disabled
+   too easily, so use aver rather than assert.  */
+static inline void
+aver (bool assertion)
+{
+  if (! assertion)
+    abort ();
+}
+
+
+/*-----------.
+| Obstacks.  |
+`-----------*/
+
+#define obstack_chunk_alloc xmalloc
+#define obstack_chunk_free  free
+#include <obstack.h>
+
+#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)
+
+#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)
+
+#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)
+
+
+
+/*-----------------------------------------.
+| Extensions to use for the output files.  |
+`-----------------------------------------*/
+
+#ifndef OUTPUT_EXT
+# define OUTPUT_EXT ".output"
+#endif
+
+#ifndef TAB_EXT
+# define TAB_EXT ".tab"
+#endif
+
+#ifndef DEFAULT_TMPDIR
+# define DEFAULT_TMPDIR "/tmp"
+#endif
+
+
+
+/*---------------------.
+| Free a linked list.  |
+`---------------------*/
+
+#define LIST_FREE(Type, List)                  \
+do {                                           \
+  Type *_node, *_next;                         \
+  for (_node = List; _node; _node = _next)     \
+    {                                          \
+      _next = _node->next;                     \
+      free (_node);                            \
+    }                                          \
+} while (0)
+
+
+/*---------------------------------------------.
+| Debugging memory allocation (must be last).  |
+`---------------------------------------------*/
+
+# if WITH_DMALLOC
+#  define DMALLOC_FUNC_CHECK
+#  include <dmalloc.h>
+# endif /* WITH_DMALLOC */
+
+#endif  /* ! BISON_SYSTEM_H */