3cc8ea1b60
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@13969 ec53bebd-3082-4978-b11e-865c3cabbd6b
157 lines
3.5 KiB
Plaintext
157 lines
3.5 KiB
Plaintext
%{
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/*
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* Copyright (c) 2004 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* $Id$ */
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include "slc.h"
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#include "slc-gram.h"
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unsigned lineno = 1;
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static void handle_comment(void);
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static char * handle_string(void);
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%}
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%%
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[A-Za-z][-A-Za-z0-9_]* {
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yylval.string = strdup ((const char *)yytext);
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return LITERAL;
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}
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"\"" { yylval.string = handle_string(); return STRING; }
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\n { ++lineno; }
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\/\* { handle_comment(); }
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[={}] { return *yytext; }
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[ \t] ;
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%%
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void
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error_message (const char *format, ...)
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{
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va_list args;
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va_start (args, format);
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fprintf (stderr, "%s:%d: ", filename, lineno);
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vfprintf (stderr, format, args);
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va_end (args);
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error_flag++;
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}
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void
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yyerror (char *s)
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{
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error_message("%s\n", s);
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}
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static void
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handle_comment(void)
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{
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int c;
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int start_lineno = lineno;
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int level = 1;
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int seen_star = 0;
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int seen_slash = 0;
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while((c = input()) != EOF) {
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if(c == '/') {
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if(seen_star) {
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if(--level == 0)
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return;
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seen_star = 0;
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continue;
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}
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seen_slash = 1;
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continue;
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}
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if(seen_star && c == '/') {
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if(--level == 0)
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return;
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seen_star = 0;
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continue;
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}
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if(c == '*') {
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if(seen_slash) {
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level++;
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seen_star = seen_slash = 0;
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continue;
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}
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seen_star = 1;
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continue;
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}
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seen_star = seen_slash = 0;
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if(c == '\n') {
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lineno++;
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continue;
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}
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}
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if(c == EOF)
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error_message("unterminated comment, possibly started on line %d\n", start_lineno);
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}
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static char *
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handle_string(void)
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{
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char x[1024];
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int i = 0;
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int c;
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int quote = 0;
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while((c = input()) != EOF){
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if(quote) {
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x[i++] = '\\';
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x[i++] = c;
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quote = 0;
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continue;
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}
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if(c == '\n'){
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error_message("unterminated string");
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lineno++;
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break;
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}
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if(c == '\\'){
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quote++;
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continue;
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}
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if(c == '\"')
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break;
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x[i++] = c;
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}
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x[i] = '\0';
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return strdup(x);
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}
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int
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yywrap ()
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{
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return 1;
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}
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