comment changes

[bison.git] / src / system.h

diff --git a/src/system.h b/src/system.h
index e3f17d890b7a0e4415348b1c46c47955a96dc7f6..3267f2d24c6cc2dbc4d2ea755f3a2fa341c7aaee 100644 (file)
--- a/src/system.h
+++ b/src/system.h
@@ -1,6 +1,6 @@
 /* System-dependent definitions for Bison.
 
-   Copyright (C) 2000-2007, 2009-2012 Free Software Foundation, Inc.
+   Copyright (C) 2000-2007, 2009-2013 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
@@ -39,9 +39,18 @@
 # include <stdlib.h>
 # include <string.h>
 
-# if HAVE_SYS_TYPES_H
-#  include <sys/types.h>
-# endif
+# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
+# 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)
+
+/* Whether Literal is a prefix of S.  */
+# define STRPREFIX_LIT(Literal, S)              \
+  (STRNCMP_LIT (S, Literal) == 0)
 
 # include <unistd.h>
 # include <inttypes.h>
@@ -52,7 +61,7 @@
 typedef size_t uintptr_t;
 # endif
 
-// Version mismatch.
+/* Version mismatch. */
 # define EX_MISMATCH 63
 
 /*---------.
@@ -85,12 +94,12 @@ typedef size_t uintptr_t;
 # 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__)
+       || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
 #   define __attribute__(Spec) /* empty */
 #  endif
 # endif
 
-/* The __-protected variants of `format' and `printf' attributes
+/* 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
@@ -105,7 +114,6 @@ typedef size_t uintptr_t;
 #  define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
 # endif
 
-# define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__)
 
 /*------.
 | NLS.  |
@@ -160,37 +168,56 @@ typedef size_t uintptr_t;
 # define obstack_chunk_free  free
 # include <obstack.h>
 
+/* String-grow: append Str to Obs.  */
+
 # 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).
 
-# 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)
+   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)
+
+
+/* Append the ending 0, finish Obs, and return the string.  */
+
+# define obstack_finish0(Obs)                                   \
+  (obstack_1grow (Obs, '\0'), (char *) obstack_finish (Obs))
 
 
 /*-----------------------------------------.
@@ -205,25 +232,21 @@ do {                                                              \
 #  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)
+# define LIST_FREE(Type, List)                  \
+  do {                                          \
+    Type *_node, *_next;                        \
+    for (_node = List; _node; _node = _next)    \
+      {                                         \
+        _next = _node->next;                    \
+        free (_node);                           \
+      }                                         \
+  } while (0)
 
 
 /*---------------------------------------------.