errors: factor b4_error @directives

[bison.git] / src / scan-skel.l

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 4bba4ac4063d42b9d869d53d51f68f83a561e13d..662a00b2f98ab2caf7257f4f7a1050959c4e3dbf 100644 (file)
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,26 +1,23 @@
 /* Scan Bison Skeletons.                                       -*- C -*-
 
 /* Scan Bison Skeletons.                                       -*- C -*-
 

-   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001-2012 Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    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
 
    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., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, 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"
 
 %{
 %option prefix="skel_" outfile="lex.yy.c"
 
 %{


@@ -29,69 +26,67 @@
 #undef skel_wrap
 #define skel_wrap() 1
 
 #undef skel_wrap
 #define skel_wrap() 1
 

-#define FLEX_NO_OBSTACK

 #define FLEX_PREFIX(Id) skel_ ## Id
 #define FLEX_PREFIX(Id) skel_ ## Id

-#include "flex-scanner.h"
+#include <src/flex-scanner.h>

 
 #include <dirname.h>
 #include <error.h>
 #include <quotearg.h>
 
 
 #include <dirname.h>
 #include <error.h>
 #include <quotearg.h>
 

-#include "complain.h"
-#include "getargs.h"
-#include "files.h"
-#include "scan-skel.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)
-
-static char *decode_at_digraphs (char *in);
+static void at_directive_perform (int argc, char *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;
   char *outname = NULL;

-%}

 
 

-"@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;
-}
+  /* Currently, only the @complain directive takes multiple arguments, and
+     never more than 7, with argv[0] being the directive name and argv[1]
+     being the type of complaint to dispatch. */
+#define ARGC_MAX 9
+  int argc = 0;
+  char *argv[ARGC_MAX];
+%}

 
 

-"@@"      fputc ('@', yyout);
-"@{"      fputc ('[', yyout);
-"@}"      fputc (']', yyout);
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+"@`" continue;  /* Used by b4_cat in ../data/bison.m4.  */
+@\n  continue;

 
 

-"@oline@"  fprintf (yyout, "%d", lineno + 1);
-"@ofile@"  QPUTS (outname);
-"@dir_prefix@" QPUTS (dir_prefix);
+"@oline@"  fprintf (yyout, "%d", out_lineno + 1);
+"@ofile@"  fputs (quotearg_style (c_quoting_style, outname), yyout);

 
 

-"@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);
+@[a-z_]+"(" {
+  yytext[yyleng-1] = '\0';
+  obstack_grow (&obstack_for_string, yytext, yyleng);
+  argv[argc++] = obstack_finish (&obstack_for_string);
+  BEGIN SC_AT_DIRECTIVE_ARGS;

 }
 
   /* This pattern must not match more than the previous @ patterns. */
 }
 
   /* This pattern must not match more than the previous @ patterns. */

-@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
-\n        lineno++; ECHO;
-[^@\n]+           ECHO;
+@[^@{}`(\n]* fail_for_invalid_at (yytext);
+\n         out_lineno++; ECHO;
+[^@\n]+    ECHO;

 
 

-<<EOF>> {
+<INITIAL><<EOF>> {

   if (outname)
     {
       free (outname);
   if (outname)
     {
       free (outname);


@@ -99,6 +94,49 @@ static char *decode_at_digraphs (char *in);
     }
   return EOF;
 }
     }
   return EOF;
 }

+
+<SC_AT_DIRECTIVE_ARGS>
+{
+  [^@]+  STRING_GROW;
+
+  "@@"   obstack_1grow (&obstack_for_string, '@');
+  "@{"   obstack_1grow (&obstack_for_string, '[');
+  "@}"   obstack_1grow (&obstack_for_string, ']');
+  "@`"   continue; /* For starting an argument that begins with whitespace. */
+  @\n    continue;
+
+  @[,)] {
+    if (argc >= ARGC_MAX)
+      fail_for_at_directive_too_many_args (argv[0]);
+
+    argv[argc++] = obstack_finish0 (&obstack_for_string);
+
+    /* Like M4, skip whitespace after a comma.  */
+    if (yytext[1] == ',')
+      BEGIN SC_AT_DIRECTIVE_SKIP_WS;
+    else
+      {
+        at_directive_perform (argc, argv, &outname, &out_lineno);
+        obstack_free (&obstack_for_string, argv[0]);
+        argc = 0;
+        BEGIN INITIAL;
+      }
+  }
+
+  @.?  fail_for_invalid_at (yytext);
+}
+
+<SC_AT_DIRECTIVE_SKIP_WS>
+{
+  [ \t\r\n]    continue;
+  .            yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS;
+}
+
+<SC_AT_DIRECTIVE_ARGS,SC_AT_DIRECTIVE_SKIP_WS>
+{
+  <<EOF>>  complain (NULL, fatal, _("unclosed %s directive in skeleton"), argv[0]);
+}
+

 %%
 
 /*------------------------.
 %%
 
 /*------------------------.


@@ -108,37 +146,97 @@ static char *decode_at_digraphs (char *in);
 void
 scan_skel (FILE *in)
 {
 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 ();
   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.  */
   yylex_destroy ();
 }
 
   /* Reclaim Flex's buffers.  */
   yylex_destroy ();
 }
 

-static char *
-decode_at_digraphs (char *in)
+static inline warnings
+flag (const char *arg)

 {
 {

-  char *out_start = xnmalloc (strlen (in)+1, sizeof *out_start);
-  char *out;
-  for (out = out_start; *in != '\0'; ++in, ++out)
+  /* compare with values issued from b4_error */
+  if (STREQ (arg, "warn"))
+    return Wother;
+  else if (STREQ (arg, "complain"))
+    return complaint;
+  else if (STREQ (arg, "fatal"))
+    return fatal;
+  else
+    aver (false);
+}
+
+static void
+at_directive_perform (int argc, char *argv[], char **outnamep, int *out_linenop)
+{
+  if (STREQ (argv[0], "@basename"))
+    {
+      if (argc > 2)
+        fail_for_at_directive_too_many_args (argv[0]);
+      fputs (last_component (argv[1]), yyout);
+    }
+  else if (STREQ (argv[0], "@complain"))
+    {
+      if (argc < 4)
+        fail_for_at_directive_too_few_args (argv[0]);
+      warnings w = flag (argv[1]);
+      location loc;
+      location *locp = NULL;
+      if (argv[2] && argv[2][0])
+        {
+          boundary_set_from_string (&loc.start, argv[2]);
+          boundary_set_from_string (&loc.end, argv[3]);
+          locp = &loc;
+        }
+      complain_args (locp, w, argc - 3, argv + 3);
+    }
+  else if (STREQ (argv[0], "@output"))

     {
     {

-      if (*in == '@')
+      if (argc > 2)
+        fail_for_at_directive_too_many_args (argv[0]);
+      if (*outnamep)

         {
         {

-          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;
-            }
+          free (*outnamep);
+          xfclose (yyout);

         }
         }

-      else
-        *out = *in;
+      *outnamep = xstrdup (argv[1]);
+      output_file_name_check (outnamep);
+      yyout = xfopen (*outnamep, "w");
+      *out_linenop = 1;

     }
     }

-  *out = '\0';
-  return out_start;
+  else
+    fail_for_invalid_at (argv[0]);
+}
+
+static void
+fail_for_at_directive_too_few_args (char const *at_directive_name)
+{
+  complain (NULL, 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)
+{
+  complain (NULL, fatal, _("too many arguments for %s directive in skeleton"),
+            at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+  complain (NULL, fatal, "invalid @ in skeleton: %s", at);

 }
 }