/* Scan Bison Skeletons. -*- C -*-
Copyright (C) 2001-2007, 2009-2012 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
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.
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 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
#define FLEX_PREFIX(Id) skel_ ## Id
#include "flex-scanner.h"
#include <dirname.h>
#include <error.h>
#include <quotearg.h>
#include "complain.h"
#include "getargs.h"
#include "files.h"
#include "scan-skel.h"
#define YY_DECL static int skel_lex (void)
YY_DECL;
#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
%%
%{
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];
%}
"@@" fputc ('@', yyout);
"@{" fputc ('[', yyout);
"@}" fputc (']', yyout);
"@`" continue; /* Used by b4_cat in ../data/bison.m4. */
@\n continue;
"@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;
<INITIAL><<EOF>> {
if (outname)
{
free (outname);
xfclose (yyout);
}
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 (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);
}
<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>> {
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 (0 == strcmp (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 (0 == strcmp (at_directive_argv[0], "@warn")
|| 0 == strcmp (at_directive_argv[0], "@complain")
|| 0 == strcmp (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 (0 == strcmp (at_directive_argv[0], "@warn_at")
|| 0 == strcmp (at_directive_argv[0], "@complain_at")
|| 0 == strcmp (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 (0 == strcmp (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);
}