/* Scan Bison Skeletons. -*- C -*-
- Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING. If not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
-%option nodefault noyywrap nounput
+%option nodefault noyywrap nounput never-interactive debug
%option prefix="skel_" outfile="lex.yy.c"
%{
+/* Work around a bug in flex 2.5.31. See Debian bug 333231
+ <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
+#undef skel_wrap
+#define skel_wrap() 1
+
#include "system.h"
+
+#include <error.h>
+#include <quotearg.h>
+
+#include "complain.h"
+#include "getargs.h"
#include "files.h"
-int skel_lex PARAMS ((void));
-static int yylineno = 1;
+#include "scan-skel.h"
+
+/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */
+int skel_lex (void);
+int skel_get_lineno (void);
+FILE *skel_get_in (void);
+FILE *skel_get_out (void);
+int skel_get_leng (void);
+char *skel_get_text (void);
+void skel_set_lineno (int);
+void skel_set_in (FILE *);
+void skel_set_out (FILE *);
+int skel_get_debug (void);
+void skel_set_debug (int);
+int skel_lex_destroy (void);
+
+#define QPUTS(String) \
+ fputs (quotearg_style (c_quoting_style, String), yyout)
+
+#define BASE_QPUTS(File) \
+ QPUTS (base_name (File))
+
%}
%%
- /* This is an approximation, but we don't need more. */
-^"#output \""[^\"]+\"\n {
- yytext[yyleng - 2] = '\0';
- skel_out = xfopen (yytext + strlen ("#output \""), "w");
- yylineno = 1;
- }
-
-"__oline__" fprintf (yyout, "%d", yylineno);
-[^_\n]+ ECHO;
-\n+ yylineno += yyleng; ECHO;
-. ECHO;
+%{
+ int lineno IF_LINT (= 0);
+ char *outname = NULL;
+%}
+
+"@output ".*\n {
+ char const *file_name = yytext + sizeof "@output " - 1;
+ yytext[yyleng - 1] = '\0';
+
+ /* Decode special file names. They include the directory part,
+ contrary to their "free" occurrences, used for issuing #includes,
+ which must not include the directory part. */
+
+ if (*file_name == '@')
+ {
+ if (strcmp (file_name, "@output_header_name@") == 0)
+ file_name = spec_defines_file;
+ else if (strcmp (file_name, "@output_parser_name@") == 0)
+ file_name = parser_file_name;
+ else
+ fatal ("invalid token in skeleton: %s", yytext);
+ }
+ if (outname)
+ {
+ free (outname);
+ xfclose (yyout);
+ }
+ outname = xstrdup (file_name);
+ yyout = xfopen (outname, "w");
+ lineno = 1;
+}
+
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+
+"@oline@" fprintf (yyout, "%d", lineno + 1);
+"@ofile@" QPUTS (outname);
+"@dir_prefix@" QPUTS (dir_prefix);
+"@output_parser_name@" BASE_QPUTS (parser_file_name);
+"@output_header_name@" BASE_QPUTS (spec_defines_file);
+
+ /* This pattern must not match more than the previous @ patterns. */
+@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
+\n lineno++; ECHO;
+[^@\n]+ ECHO;
+
+<<EOF>> {
+ if (outname)
+ {
+ free (outname);
+ xfclose (yyout);
+ }
+ return EOF;
+}
%%
+
+/*------------------------.
+| Scan a Bison skeleton. |
+`------------------------*/
+
+void
+scan_skel (FILE *in)
+{
+ skel_in = in;
+ skel__flex_debug = trace_flag & trace_skeleton;
+ skel_lex ();
+ /* Reclaim Flex's buffers. */
+ yy_delete_buffer (YY_CURRENT_BUFFER);
+}