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%{
/*
* Copyright (c) 2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $Id$ */
#undef ECHO
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include "slc.h"
#include "slc-gram.h"
unsigned lineno = 1;
static void handle_comment(void);
static char * handle_string(void);
#define YY_NO_UNPUT
#undef ECHO
%}
%%
[A-Za-z][-A-Za-z0-9_]* {
yylval.string = strdup ((const char *)yytext);
return LITERAL;
}
"\"" { yylval.string = handle_string(); return STRING; }
\n { ++lineno; }
\/\* { handle_comment(); }
[={}] { return *yytext; }
[ \t] ;
%%
void
error_message (const char *format, ...)
{
va_list args;
va_start (args, format);
fprintf (stderr, "%s:%d: ", filename, lineno);
vfprintf (stderr, format, args);
va_end (args);
error_flag++;
}
void
yyerror (const char *s)
{
error_message("%s\n", s);
}
static void
handle_comment(void)
{
int c;
int start_lineno = lineno;
int level = 1;
int seen_star = 0;
int seen_slash = 0;
while((c = input()) != EOF) {
if(c == '/') {
if(seen_star) {
if(--level == 0)
return;
seen_star = 0;
continue;
}
seen_slash = 1;
continue;
} else if(c == '*') {
if(seen_slash) {
level++;
seen_star = seen_slash = 0;
continue;
}
seen_star = 1;
continue;
}
seen_star = seen_slash = 0;
if(c == '\n') {
lineno++;
continue;
}
}
if(c == EOF)
error_message("unterminated comment, possibly started on line %d\n", start_lineno);
}
static char *
handle_string(void)
{
char x[1024];
int i = 0;
int c;
int quote = 0;
while((c = input()) != EOF){
if(quote) {
x[i++] = '\\';
x[i++] = c;
quote = 0;
continue;
}
if(c == '\n'){
error_message("unterminated string");
lineno++;
break;
}
if(c == '\\'){
quote++;
continue;
}
if(c == '\"')
break;
x[i++] = c;
}
x[i] = '\0';
return strdup(x);
}
int
yywrap ()
{
return 1;
}
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