X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/72cd9a913f6d282c5e24990505c2c820bda2bf1b..6fbe73b6a048046a4e674df12d5db9223acac67c:/src/system.h

diff --git a/src/system.h b/src/system.h
index 0d69e93e..eba7845e 100644
--- a/src/system.h
+++ b/src/system.h
@@ -39,6 +39,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
 #define STREQ(L, R)  (strcmp(L, R) == 0)
 #define STRNEQ(L, R) (!STREQ(L, R))
 
@@ -172,36 +173,57 @@ 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).
 
-#define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
-do {                                            \
-  char buf[4096];                               \
-  sprintf (buf, Format, Arg1, Arg2);            \
-  obstack_grow (Obs, buf, strlen (buf));        \
-} while (0)
+   For instance "[foo]" -> "@{foo@}", "$$" -> "$][$][". */
 
-#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_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)
+
+
+/* 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)
+
+
+/* Append the ending 0, finish Obs, and return the string.  */
+
+# define obstack_finish0(Obs)                           \
+  (obstack_1grow (Obs, '\0'), (char *) obstack_finish (Obs))
 
-#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)
 
 
 
@@ -217,10 +239,6 @@ do {                                                            \
 # define TAB_EXT ".tab"
 #endif
 
-#ifndef DEFAULT_TMPDIR
-# define DEFAULT_TMPDIR "/tmp"
-#endif
-
 
 
 /*---------------------.