freebsd-dev/crypto/heimdal/lib/sl/lex.l

%{
/*
 * Copyright (c) 1998 - 2000 Kungliga Tekniska H<>gskolan
 * (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. 
 */

#undef ECHO

#include "make_cmds.h"
#include "parse.h"

RCSID("$Id: lex.l,v 1.5 2000/12/05 09:21:46 joda Exp $");

static unsigned lineno = 1;
static int getstring(void);

#define YY_NO_UNPUT

%}


%%
command_table		{ return TABLE; }
request			{ return REQUEST; }
unknown			{ return UNKNOWN; }
unimplemented		{ return UNIMPLEMENTED; }
end			{ return END; }
#[^\n]*			;
[ \t]			;
\n			{ lineno++; }
\"			{ return getstring(); }
[a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
.			{ return *yytext; }
%%

#ifndef yywrap /* XXX */
int
yywrap () 
{
     return 1;
}
#endif

static int
getstring(void)
{
    char x[128];
    int i = 0;
    int c;
    int backslash = 0;
    while((c = input()) != EOF){
	if(backslash) {
	    if(c == 'n')
		c = '\n';
	    else if(c == 't')
		c = '\t';
	    x[i++] = c;
	    backslash = 0;
	    continue;
	}
	if(c == '\n'){
	    error_message("unterminated string");
	    lineno++;
	    break;
	}
	if(c == '\\'){
	    backslash++;
	    continue;
	}
	if(c == '\"')
	    break;
	x[i++] = c;
    }
    x[i] = '\0';
    yylval.string = strdup(x);
    return STRING;
}

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);
     numerror++;
}