X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/be2a1a68efe93f7046f77b81346e4c740c14fb40..b0f98b1016367bf4515ce3d0da5eaa99615d9293:/src/scan-skel.l?ds=sidebyside

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 82f9ed1a..0d7114a7 100644
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -18,26 +18,72 @@
    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 
-%option nodefault noyywrap nounput
+%option nodefault noyywrap nounput never-interactive
 %option prefix="skel_" outfile="lex.yy.c"
 
 %{
 #include "system.h"
+#include "quotearg.h"
+#include "error.h"
+#include "getargs.h"
 #include "files.h"
-int skel_lex PARAMS ((void));
-static int yylineno = 1;
+
+int skel_lex (void);
+
 %}
 %%
-  /* 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 *filename = yytext + sizeof "@output " - 1;
+  yytext[yyleng - 1] = '\0';
+
+  if (*filename == '@')
+    {
+      if (strcmp (filename, "@output_header_name@") == 0)
+	filename = spec_defines_file;
+      else if (strcmp (filename, "@output_parser_name@") == 0)
+	filename = parser_file_name;
+      else
+	abort ();
+    }
+
+  XFREE (outname);
+  outname = xstrdup (filename);
+  yyout = xfopen (outname, "w");
+  lineno = 1;
+}
+
+"@@"	   fputc ('@', yyout);
+"@{"	   fputc ('[', yyout);
+"@}"	   fputc (']', yyout);
+
+"@oline@"  fprintf (yyout, "%d", lineno);
+"@ofile@"  fputs (quotearg_style (c_quoting_style, outname), yyout);
+
+"@"	   abort ();
+\n	   lineno++; ECHO;
+.	   ECHO;
+
+<<EOF>>	   xfclose (yyout); free (outname); return EOF;
 %%
+
+/*------------------------.
+| Scan a Bison skeleton.  |
+`------------------------*/
+
+void scan_skel (FILE *);
+
+void
+scan_skel (FILE *in)
+{
+  skel_in = in;
+  skel_lex ();
+
+  /* Reclaim Flex's buffers.  */
+  yy_delete_buffer (YY_CURRENT_BUFFER);
+}