X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/88015bf06b342b34b0b4de833af3ba40acfd2f74..7aaaad6c6dc0fae412d608dcf20a3977d8902cd1:/src/scan-skel.l

diff --git a/src/scan-skel.l b/src/scan-skel.l
index fd9bd4c6..284a1207 100644
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,98 +1,304 @@
 /* Scan Bison Skeletons.                                       -*- C -*-
 
-   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 2001-2012 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
-   Bison 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, or (at your option)
-   any later version.
+   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 3 of the License, or
+   (at your option) any later version.
 
-   Bison 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.
+   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 Bison; see the file COPYING.  If not, write to the Free
-   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-%option nodefault noyywrap nounput never-interactive debug
+%option nodefault noyywrap noinput nounput never-interactive debug
 %option prefix="skel_" outfile="lex.yy.c"
 
 %{
-#include "system.h"
+/* 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
 
+#define FLEX_PREFIX(Id) skel_ ## Id
+#include <src/flex-scanner.h>
+
+#include <dirname.h>
 #include <error.h>
 #include <quotearg.h>
 
-#include "getargs.h"
-#include "files.h"
+#include <src/complain.h>
+#include <src/getargs.h>
+#include <src/files.h>
+#include <src/scan-skel.h>
 
-int skel_lex (void);
+#define YY_DECL static int skel_lex (void)
+YY_DECL;
 
 #define QPUTS(String) \
-   fputs (quotearg_style (c_quoting_style, (String)), yyout);
+   fputs (quotearg_style (c_quoting_style, String), yyout)
 
+static void at_directive_perform (int at_directive_argc,
+                                  char *at_directive_argv[],
+                                  char **outnamep, int *out_linenop);
+static void fail_for_at_directive_too_many_args (char const *at_directive_name);
+static void fail_for_at_directive_too_few_args (char const *at_directive_name);
+static void fail_for_invalid_at (char const *at);
 %}
+
+%x SC_AT_DIRECTIVE_ARGS
+%x SC_AT_DIRECTIVE_SKIP_WS
+
 %%
 
 %{
-  int lineno IF_LINT (= 0);
+  int out_lineno PACIFY_CC (= 0);
   char *outname = NULL;
+
+  /* Currently, only the @warn, @complain, @fatal, @warn_at, @complain_at, and
+     @fatal_at directives take multiple arguments, and the last three already
+     can't take more than 7.  at_directive_argv[0] is the directive name.  */
+  #define AT_DIRECTIVE_ARGC_MAX 8
+  int at_directive_argc = 0;
+  char *at_directive_argv[AT_DIRECTIVE_ARGC_MAX];
 %}
 
-"@output ".*\n {
-  char const *filename = yytext + sizeof "@output " - 1;
-  yytext[yyleng - 1] = '\0';
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+"@`" /* Empty.  Used by b4_cat in ../data/bison.m4.  */
+@\n  /* Likewise.  */
+
+"@oline@"  fprintf (yyout, "%d", out_lineno + 1);
+"@ofile@"  QPUTS (outname);
+
+@[a-z_]+"(" {
+  yytext[yyleng-1] = '\0';
+  obstack_grow (&obstack_for_string, yytext, yyleng);
+  at_directive_argv[at_directive_argc++] =
+    obstack_finish (&obstack_for_string);
+  BEGIN SC_AT_DIRECTIVE_ARGS;
+}
+
+  /* This pattern must not match more than the previous @ patterns. */
+@[^@{}`(\n]* fail_for_invalid_at (yytext);
+\n         out_lineno++; ECHO;
+[^@\n]+    ECHO;
 
-  if (*filename == '@')
+<INITIAL><<EOF>> {
+  if (outname)
     {
-      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 ();
+      free (outname);
+      xfclose (yyout);
     }
-
-  XFREE (outname);
-  outname = xstrdup (filename);
-  xfclose (yyout);
-  yyout = xfopen (outname, "w");
-  lineno = 1;
+  return EOF;
 }
 
-"@@"	   fputc ('@', yyout);
-"@{"	   fputc ('[', yyout);
-"@}"	   fputc (']', yyout);
+<SC_AT_DIRECTIVE_ARGS>{
+  [^@]+ { STRING_GROW; }
 
-"@oline@"  fprintf (yyout, "%d", lineno);
-"@ofile@"  QPUTS (outname);
-"@output_parser_name@"	QPUTS (parser_file_name);
-"@output_header_name@"  QPUTS (spec_defines_file);
+  "@@" { obstack_1grow (&obstack_for_string, '@'); }
+  "@{" { obstack_1grow (&obstack_for_string, '['); }
+  "@}" { obstack_1grow (&obstack_for_string, ']'); }
+  "@`" /* Empty.  Useful for starting an argument
+          that begins with whitespace. */
+  @\n  /* Empty.  */
+
+  @[,)] {
+    if (at_directive_argc >= AT_DIRECTIVE_ARGC_MAX)
+      fail_for_at_directive_too_many_args (at_directive_argv[0]);
 
-"@"	   abort ();
-\n	   lineno++; ECHO;
-[^@\n]+	   ECHO;
+    obstack_1grow (&obstack_for_string, '\0');
+    at_directive_argv[at_directive_argc++] =
+      obstack_finish (&obstack_for_string);
+
+    /* Like M4, skip whitespace after a comma.  */
+    if (yytext[1] == ',')
+      BEGIN SC_AT_DIRECTIVE_SKIP_WS;
+    else
+      {
+        at_directive_perform (at_directive_argc, at_directive_argv,
+                              &outname, &out_lineno);
+        obstack_free (&obstack_for_string, at_directive_argv[0]);
+        at_directive_argc = 0;
+        BEGIN INITIAL;
+      }
+  }
+
+  @.? { fail_for_invalid_at (yytext); }
+}
+
+<SC_AT_DIRECTIVE_SKIP_WS>{
+  [ \t\r\n]
+  . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS; }
+}
+
+<SC_AT_DIRECTIVE_ARGS,SC_AT_DIRECTIVE_SKIP_WS>{
+  <<EOF>> {
+    fatal (_("unclosed %s directive in skeleton"), at_directive_argv[0]);
+  }
+}
 
-<<EOF>>	   xfclose (yyout); free (outname); return EOF;
 %%
 
 /*------------------------.
 | Scan a Bison skeleton.  |
 `------------------------*/
 
-void scan_skel (FILE *);
-
 void
 scan_skel (FILE *in)
 {
+  static bool initialized = false;
+  if (!initialized)
+    {
+      initialized = true;
+      obstack_init (&obstack_for_string);
+    }
   skel_in = in;
   skel__flex_debug = trace_flag & trace_skeleton;
   skel_lex ();
+}
+
+void
+skel_scanner_free (void)
+{
+  obstack_free (&obstack_for_string, 0);
   /* Reclaim Flex's buffers.  */
-  yy_delete_buffer (YY_CURRENT_BUFFER);
+  yylex_destroy ();
+}
+
+static void
+at_directive_perform (int at_directive_argc,
+                      char *at_directive_argv[],
+                      char **outnamep, int *out_linenop)
+{
+  if (STREQ (at_directive_argv[0], "@basename"))
+    {
+      if (at_directive_argc > 2)
+        fail_for_at_directive_too_many_args (at_directive_argv[0]);
+      fputs (last_component (at_directive_argv[1]), yyout);
+    }
+  else if (STREQ (at_directive_argv[0], "@warn")
+           || STREQ (at_directive_argv[0], "@complain")
+           || STREQ (at_directive_argv[0], "@fatal"))
+    {
+      void (*func)(char const *, ...);
+      switch (at_directive_argv[0][1])
+        {
+          case 'w': func = warn; break;
+          case 'c': func = complain; break;
+          case 'f': func = fatal; break;
+          default: aver (false); break;
+        }
+      switch (at_directive_argc)
+        {
+          case 2:
+            func (_(at_directive_argv[1]));
+            break;
+          case 3:
+            func (_(at_directive_argv[1]), at_directive_argv[2]);
+            break;
+          case 4:
+            func (_(at_directive_argv[1]), at_directive_argv[2],
+                  at_directive_argv[3]);
+            break;
+          case 5:
+            func (_(at_directive_argv[1]), at_directive_argv[2],
+                  at_directive_argv[3], at_directive_argv[4]);
+            break;
+          case 6:
+            func (_(at_directive_argv[1]), at_directive_argv[2],
+                  at_directive_argv[3], at_directive_argv[4],
+                  at_directive_argv[5]);
+            break;
+          default:
+            fail_for_at_directive_too_many_args (at_directive_argv[0]);
+            break;
+        }
+    }
+  else if (STREQ (at_directive_argv[0], "@warn_at")
+           || STREQ (at_directive_argv[0], "@complain_at")
+           || STREQ (at_directive_argv[0], "@fatal_at"))
+    {
+      void (*func)(location, char const *, ...);
+      location loc;
+      if (at_directive_argc < 4)
+        fail_for_at_directive_too_few_args (at_directive_argv[0]);
+      switch (at_directive_argv[0][1])
+        {
+          case 'w': func = warn_at; break;
+          case 'c': func = complain_at; break;
+          case 'f': func = fatal_at; break;
+          default: aver (false); break;
+        }
+      boundary_set_from_string (&loc.start, at_directive_argv[1]);
+      boundary_set_from_string (&loc.end, at_directive_argv[2]);
+      switch (at_directive_argc)
+        {
+          case 4:
+            func (loc, _(at_directive_argv[3]));
+            break;
+          case 5:
+            func (loc, _(at_directive_argv[3]), at_directive_argv[4]);
+            break;
+          case 6:
+            func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+                  at_directive_argv[5]);
+            break;
+          case 7:
+            func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+                  at_directive_argv[5], at_directive_argv[6]);
+            break;
+          case 8:
+            func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+                  at_directive_argv[5], at_directive_argv[6],
+                  at_directive_argv[7]);
+            break;
+          default:
+            fail_for_at_directive_too_many_args (at_directive_argv[0]);
+            break;
+        }
+    }
+  else if (STREQ (at_directive_argv[0], "@output"))
+    {
+      if (at_directive_argc > 2)
+        fail_for_at_directive_too_many_args (at_directive_argv[0]);
+      if (*outnamep)
+        {
+          free (*outnamep);
+          xfclose (yyout);
+        }
+      *outnamep = xstrdup (at_directive_argv[1]);
+      output_file_name_check (outnamep);
+      yyout = xfopen (*outnamep, "w");
+      *out_linenop = 1;
+    }
+  else
+    fail_for_invalid_at (at_directive_argv[0]);
+}
+
+static void
+fail_for_at_directive_too_few_args (char const *at_directive_name)
+{
+  fatal (_("too few arguments for %s directive in skeleton"),
+         at_directive_name);
+}
+
+static void
+fail_for_at_directive_too_many_args (char const *at_directive_name)
+{
+  fatal (_("too many arguments for %s directive in skeleton"),
+         at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+  fatal ("invalid @ in skeleton: %s", at);
 }