From: Akim Demaille <akim@epita.fr>
Date: Wed, 7 Jun 2006 07:58:28 +0000 (+0000)
Subject: Add it for real.
X-Git-Tag: v2.3b~376
X-Git-Url: https://git.saurik.com/bison.git/commitdiff_plain/9f936c5e9c9a93c201ecefcafdc426b3b0a8e842

Add it for real.
---

diff --git a/src/flex-scanner.h b/src/flex-scanner.h
new file mode 100644
index 00000000..1580bea8
--- /dev/null
+++ b/src/flex-scanner.h
@@ -0,0 +1,72 @@
+/* Common parts between scan-code.l and scan-gram.l.
+
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+   This file is part of Bison, the GNU Compiler Compiler.
+
+   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 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
+   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 FLEX_PREFIX
+# error "FLEX_PREFIX not defined"
+#endif
+
+#include "system.h"
+
+/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used.  */
+int   FLEX_PREFIX (get_lineno) (void);
+FILE *FLEX_PREFIX (get_in) (void);
+FILE *FLEX_PREFIX (get_out) (void);
+int   FLEX_PREFIX (get_leng) (void);
+char *FLEX_PREFIX (get_text) (void);
+void  FLEX_PREFIX (set_lineno) (int);
+void  FLEX_PREFIX (set_in) (FILE *);
+void  FLEX_PREFIX (set_out) (FILE *);
+int   FLEX_PREFIX (get_debug) (void);
+void  FLEX_PREFIX (set_debug) (int);
+int   FLEX_PREFIX (lex_destroy) (void);
+
+#define last_string    FLEX_PREFIX (last_string)
+
+/* It seems to be a nice "feature" of Flex that one cannot use yytext,
+   yyleng etc. when a prefix is given, since there is no longer a
+   #define, but rather the token is actually changed in the output.
+   */
+#define yyleng  FLEX_PREFIX (leng)
+#define yytext  FLEX_PREFIX (text)
+
+/* OBSTACK_FOR_STRING -- Used to store all the characters that we need to
+   keep (to construct ID, STRINGS etc.).  Use the following macros to
+   use it.
+
+   Use STRING_GROW to append what has just been matched, and
+   STRING_FINISH to end the string (it puts the ending 0).
+   STRING_FINISH also stores this string in LAST_STRING, which can be
+   used, and which is used by STRING_FREE to free the last string.  */
+
+static struct obstack obstack_for_string;
+
+#define STRING_GROW   \
+  obstack_grow (&obstack_for_string, yytext, yyleng)
+
+#define STRING_FINISH					\
+  do {							\
+    obstack_1grow (&obstack_for_string, '\0');		\
+    last_string = obstack_finish (&obstack_for_string);	\
+  } while (0)
+
+#define STRING_FREE \
+  obstack_free (&obstack_for_string, FLEX_PREFIX (last_string))