X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1239777d4f4f96a23e5cd177121f16f0d9e71c68..ab8e7e1a8220a7ad99c4d47711c1123b7677bd81:/src/scan-skel.l?ds=sidebyside

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 71577d7e..4bba4ac4 100644
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,6 +1,7 @@
-                                                             /* -*- C -*- */
-/* Scan Bison Skeletons.
-   Copyright (C) 2001  Free Software Foundation, Inc.
+/* Scan Bison Skeletons.                                       -*- C -*-
+
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
+   Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -16,66 +17,128 @@
 
    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 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 "skeleton.h"
-#include "parse-skel.h"
+#define FLEX_NO_OBSTACK
+#define FLEX_PREFIX(Id) skel_ ## Id
+#include "flex-scanner.h"
 
-%}
+#include <dirname.h>
+#include <error.h>
+#include <quotearg.h>
 
-%option nounput
-%option noyywrap
-/* If we enable
+#include "complain.h"
+#include "getargs.h"
+#include "files.h"
+#include "scan-skel.h"
 
-   %option yylineno
+int skel_lex (void);
 
-   Then we have warning: `yy_flex_realloc' defined but not used.
-   Seems like a Flex bug to me: Why the heck yylineno would trigger
-   the REJECT exception???  */
+#define QPUTS(String) \
+   fputs (quotearg_style (c_quoting_style, String), yyout)
 
+static char *decode_at_digraphs (char *in);
+%}
 %%
 
-"%%{line}"          { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
+%{
+  int lineno IF_LINT (= 0);
+  char *outname = NULL;
+%}
 
-"%%{yacc}"    { return YACC; }
-"%%{section}" { return SECTION; }
+"@output ".*\n {
+  char *file_name = yytext + sizeof "@output " - 1;
+  yytext[yyleng - 1] = '\0';
+  if (outname)
+    {
+      free (outname);
+      xfclose (yyout);
+    }
+  outname = decode_at_digraphs (file_name);
+  output_file_name_check (outname);
+  yyout = xfopen (outname, "w");
+  lineno = 1;
+}
 
-"%%{guards}"   { return GUARDS; }
-"%%{actions}"  { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+"@@"	   fputc ('@', yyout);
+"@{"	   fputc ('[', yyout);
+"@}"	   fputc (']', yyout);
 
-"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" { /* Muscle.  */
-  size_t len = strlen (yytext);
-  yylval.string = (char*) malloc (len - 3);
-  strncpy (yylval.string, yytext + 3, len - 4);
-  yylval.string[len - 4] = 0;
-  return MUSCLE;
-}
+"@oline@"  fprintf (yyout, "%d", lineno + 1);
+"@ofile@"  QPUTS (outname);
+"@dir_prefix@" QPUTS (dir_prefix);
 
-"%%\"".*"\"" { /* String.  */
-  size_t len = strlen (yytext);
-  yylval.string = (char*) malloc (len - 3);
-  strncpy (yylval.string, yytext + 3, len - 4);
-  yylval.string[len - 4] = 0;
-  return STRING;
+"@basename(".*"@)" {
+  char *file_name = yytext + sizeof "@basename " - 1;
+  yytext[yyleng - 2] = '\0';
+  file_name = decode_at_digraphs (file_name);
+  fputs (last_component (file_name), yyout);
+  free (file_name);
 }
 
-<<EOF>> { /* End of file.  */
-  return 0;
+  /* 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;
 }
+%%
 
-"\n" { /* End of line.  */
-  return '\n';
+/*------------------------.
+| 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.  */
+  yylex_destroy ();
 }
 
-. { /* Character.  */
-  yylval.character = *yytext;
-  return CHARACTER;
+static char *
+decode_at_digraphs (char *in)
+{
+  char *out_start = xnmalloc (strlen (in)+1, sizeof *out_start);
+  char *out;
+  for (out = out_start; *in != '\0'; ++in, ++out)
+    {
+      if (*in == '@')
+        {
+          switch (*++in)
+            {
+              case '@': *out = '@'; break;
+              case '{': *out = '['; break;
+              case '}': *out = ']'; break;
+              default:
+                if (*in != '\0')
+                  in[1] = '\0';
+                fatal ("invalid @ in skeleton: %s", in-1);
+                break;
+            }
+        }
+      else
+        *out = *in;
+    }
+  *out = '\0';
+  return out_start;
 }
-
-%%