* data/Makefile.am (dist_pkgdata_DATA): Remove push.c.

[bison.git] / src / flex-scanner.h

diff --git a/src/flex-scanner.h b/src/flex-scanner.h
index c14590550cad1e24e5f1c1d0d4925f374262fbfa..ffa519147860621c01ffdb4dd915609be13a472c 100644 (file)
--- a/src/flex-scanner.h
+++ b/src/flex-scanner.h
@@ -1,12 +1,12 @@
-/* Common parts between scan-code.l and scan-gram.l.
+/* Common parts between scan-code.l, scan-gram.l, and scan-skel.l.

 
    Copyright (C) 2006 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    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
+   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
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2 of the License, or
+   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,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -15,10 +15,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    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
-*/
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 #ifndef FLEX_PREFIX
 # error "FLEX_PREFIX not defined"
 
 #ifndef FLEX_PREFIX
 # error "FLEX_PREFIX not defined"


@@ -50,6 +47,19 @@ int   FLEX_PREFIX (lex_destroy) (void);
 # define yytext  FLEX_PREFIX (text)
 #endif
 
 # define yytext  FLEX_PREFIX (text)
 #endif
 

+/* Non-reentrant scanners generated by Flex 2.5.9 and later (and some earlier
+   versions according to the Flex manual) leak memory if yylex_destroy is not
+   invoked.  However, yylex_destroy is not defined before Flex 2.5.9, so give
+   an implementation here that at least appears to work with Flex 2.5.4.  */
+#if !defined(YY_FLEX_MAJOR_VERSION) || YY_FLEX_MAJOR_VERSION < 2 \
+    || (YY_FLEX_MAJOR_VERSION == 2 \
+        && (!defined(YY_FLEX_MINOR_VERSION) || YY_FLEX_MINOR_VERSION < 5 \
+            || (YY_FLEX_MINOR_VERSION == 5 \
+                && (!defined(YY_FLEX_SUBMINOR_VERSION) \
+                    || YY_FLEX_SUBMINOR_VERSION < 9))))
+# define yylex_destroy() yy_delete_buffer (YY_CURRENT_BUFFER)
+#endif
+

 /* 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.
 /* 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.


@@ -59,6 +69,8 @@ int   FLEX_PREFIX (lex_destroy) (void);
    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.  */
 
    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.  */
 

+#ifndef FLEX_NO_OBSTACK
+

 static struct obstack obstack_for_string;
 
 #define STRING_GROW   \
 static struct obstack obstack_for_string;
 
 #define STRING_GROW   \


@@ -71,4 +83,6 @@ static struct obstack obstack_for_string;
   } while (0)
 
 #define STRING_FREE \
   } while (0)
 
 #define STRING_FREE \

-  obstack_free (&obstack_for_string, FLEX_PREFIX (last_string))
+  obstack_free (&obstack_for_string, last_string)
+
+#endif