- /* -*- C -*- */
-/* Scan Bison Skeletons.
- Copyright (C) 2001 Free Software Foundation, Inc.
+/* Scan Bison Skeletons. -*- C -*-
+
+ 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 noinput 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_PREFIX(Id) skel_ ## Id
+#include <src/flex-scanner.h>
-%}
+#include <dirname.h>
+#include <error.h>
+#include <quotearg.h>
-%option nounput
-%option noyywrap
-/* If we enable
+#include <src/complain.h>
+#include <src/getargs.h>
+#include <src/files.h>
+#include <src/scan-skel.h>
- %option yylineno
+#define YY_DECL static int skel_lex (void)
+YY_DECL;
- 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 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
%%
-"%%{line}" { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
+%{
+ 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];
+%}
-"%%{yacc}" { return YACC; }
-"%%{section}" { return SECTION; }
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+"@`" continue; /* Used by b4_cat in ../data/bison.m4. */
+@\n continue;
-"%%{guards}" { return GUARDS; }
-"%%{actions}" { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+"@oline@" fprintf (yyout, "%d", out_lineno + 1);
+"@ofile@" QPUTS (outname);
-"%%{"[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;
+@[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;
}
-"%%\"".*"\"" { /* 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;
+ /* This pattern must not match more than the previous @ patterns. */
+@[^@{}`(\n]* fail_for_invalid_at (yytext);
+\n out_lineno++; ECHO;
+[^@\n]+ ECHO;
+
+<<EOF>> {
+ if (outname)
+ {
+ free (outname);
+ xfclose (yyout);
+ }
+ return EOF;
}
-<<EOF>> { /* End of file. */
- return 0;
+<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 (at_directive_argc >= AT_DIRECTIVE_ARGC_MAX)
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+
+ 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);
}
-"\n" { /* End of line. */
- return '\n';
+<SC_AT_DIRECTIVE_SKIP_WS>
+{
+ [ \t\r\n] continue;
+ . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS; }
}
-. { /* Character. */
- yylval.character = *yytext;
- return CHARACTER;
+<SC_AT_DIRECTIVE_ARGS,SC_AT_DIRECTIVE_SKIP_WS>
+{
+ <<EOF>> {
+ complain (fatal, _("unclosed %s directive in skeleton"),
+ at_directive_argv[0]);
+ }
}
%%
+
+/*------------------------.
+| Scan a Bison skeleton. |
+`------------------------*/
+
+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. */
+ 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"))
+ {
+ warnings complaint_flag;
+ switch (at_directive_argv[0][1])
+ {
+ case 'w': complaint_flag = Wother; break;
+ case 'c': complaint_flag = complaint; break;
+ case 'f': complaint_flag = fatal; break;
+ default: aver (false); break;
+ }
+ switch (at_directive_argc)
+ {
+ case 2:
+ complain (complaint_flag, "%s", _(at_directive_argv[1]));
+ break;
+ case 3:
+ complain (complaint_flag, _(at_directive_argv[1]),
+ at_directive_argv[2]);
+ break;
+ case 4:
+ complain (complaint_flag, _(at_directive_argv[1]),
+ at_directive_argv[2], at_directive_argv[3]);
+ break;
+ case 5:
+ complain (complaint_flag, _(at_directive_argv[1]),
+ at_directive_argv[2], at_directive_argv[3],
+ at_directive_argv[4]);
+ break;
+ case 6:
+ complain (complaint_flag, _(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"))
+ {
+ warnings complaint_flag;
+ 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': complaint_flag = Wother; break;
+ case 'c': complaint_flag = complaint; break;
+ case 'f': complaint_flag = fatal; 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:
+ complain_at (loc, complaint_flag, "%s", _(at_directive_argv[3]));
+ break;
+ case 5:
+ complain_at (loc, complaint_flag, _(at_directive_argv[3]),
+ at_directive_argv[4]);
+ break;
+ case 6:
+ complain_at (loc, complaint_flag, _(at_directive_argv[3]),
+ at_directive_argv[4], at_directive_argv[5]);
+ break;
+ case 7:
+ complain_at (loc, complaint_flag, _(at_directive_argv[3]),
+ at_directive_argv[4], at_directive_argv[5],
+ at_directive_argv[6]);
+ break;
+ case 8:
+ complain_at (loc, complaint_flag, _(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)
+{
+ complain (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 (fatal, _("too many arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+ complain (fatal, "invalid @ in skeleton: %s", at);
+}
projects / bison.git / blobdiff