heimdal/lib/asn1/lex.l

%{
/*
 * Copyright (c) 1997 - 2005 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. 
 */

/* $Id$ */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#undef ECHO
#include "symbol.h"
#include "parse.h"
#include "lex.h"
#include "gen_locl.h"

static unsigned lineno = 1;

#undef ECHO

static void handle_comment(int type);
static char *handle_string(void);
%}


%%
ABSENT			{ return kw_ABSENT; }
ABSTRACT-SYNTAX		{ return kw_ABSTRACT_SYNTAX; }
ALL			{ return kw_ALL; }
APPLICATION		{ return kw_APPLICATION; }
AUTOMATIC		{ return kw_AUTOMATIC; }
BEGIN			{ return kw_BEGIN; }
BIT			{ return kw_BIT; }
BMPString		{ return kw_BMPString; }
BOOLEAN			{ return kw_BOOLEAN; }
BY			{ return kw_BY; }
CHARACTER		{ return kw_CHARACTER; }
CHOICE			{ return kw_CHOICE; }
CLASS			{ return kw_CLASS; }
COMPONENT		{ return kw_COMPONENT; }
COMPONENTS		{ return kw_COMPONENTS; }
CONSTRAINED		{ return kw_CONSTRAINED; }
CONTAINING		{ return kw_CONTAINING; }
DEFAULT			{ return kw_DEFAULT; }
DEFINITIONS		{ return kw_DEFINITIONS; }
EMBEDDED		{ return kw_EMBEDDED; }
ENCODED			{ return kw_ENCODED; }
END			{ return kw_END; }
ENUMERATED		{ return kw_ENUMERATED; }
EXCEPT			{ return kw_EXCEPT; }
EXPLICIT		{ return kw_EXPLICIT; }
EXPORTS			{ return kw_EXPORTS; }
EXTENSIBILITY		{ return kw_EXTENSIBILITY; }
EXTERNAL		{ return kw_EXTERNAL; }
FALSE			{ return kw_FALSE; }
FROM			{ return kw_FROM; }
GeneralString		{ return kw_GeneralString; }
GeneralizedTime		{ return kw_GeneralizedTime; }
GraphicString		{ return kw_GraphicString; }
IA5String		{ return kw_IA5String; }
IDENTIFIER		{ return kw_IDENTIFIER; }
IMPLICIT		{ return kw_IMPLICIT; }
IMPLIED			{ return kw_IMPLIED; }
IMPORTS			{ return kw_IMPORTS; }
INCLUDES		{ return kw_INCLUDES; }
INSTANCE		{ return kw_INSTANCE; }
INTEGER			{ return kw_INTEGER; }
INTERSECTION		{ return kw_INTERSECTION; }
ISO646String		{ return kw_ISO646String; }
MAX			{ return kw_MAX; }
MIN			{ return kw_MIN; }
MINUS-INFINITY		{ return kw_MINUS_INFINITY; }
NULL			{ return kw_NULL; }
NumericString		{ return kw_NumericString; }
OBJECT			{ return kw_OBJECT; }
OCTET			{ return kw_OCTET; }
OF			{ return kw_OF; }
OPTIONAL		{ return kw_OPTIONAL; }
ObjectDescriptor	{ return kw_ObjectDescriptor; }
PATTERN			{ return kw_PATTERN; }
PDV			{ return kw_PDV; }
PLUS-INFINITY		{ return kw_PLUS_INFINITY; }
PRESENT			{ return kw_PRESENT; }
PRIVATE			{ return kw_PRIVATE; }
PrintableString		{ return kw_PrintableString; }
REAL			{ return kw_REAL; }
RELATIVE_OID		{ return kw_RELATIVE_OID; }
SEQUENCE		{ return kw_SEQUENCE; }
SET			{ return kw_SET; }
SIZE			{ return kw_SIZE; }
STRING			{ return kw_STRING; }
SYNTAX			{ return kw_SYNTAX; }
T61String		{ return kw_T61String; }
TAGS			{ return kw_TAGS; }
TRUE			{ return kw_TRUE; }
TYPE-IDENTIFIER		{ return kw_TYPE_IDENTIFIER; }
TeletexString		{ return kw_TeletexString; }
UNION			{ return kw_UNION; }
UNIQUE			{ return kw_UNIQUE; }
UNIVERSAL		{ return kw_UNIVERSAL; }
UTCTime			{ return kw_UTCTime; }
UTF8String		{ return kw_UTF8String; }
UniversalString		{ return kw_UniversalString; }
VideotexString		{ return kw_VideotexString; }
VisibleString		{ return kw_VisibleString; }
WITH			{ return kw_WITH; }
[-,;{}()|]		{ return *yytext; }
"["			{ return *yytext; }
"]"			{ return *yytext; }
::=			{ return EEQUAL; }
--			{ handle_comment(0); }
\/\*			{ handle_comment(1); }
"\""			{ yylval.name = handle_string(); return STRING; }

-?0x[0-9A-Fa-f]+|-?[0-9]+ { char *e, *y = yytext;
			  yylval.constant = strtol((const char *)yytext,
						   &e, 0);
			  if(e == y) 
			    error_message("malformed constant (%s)", yytext); 
			  else
			    return NUMBER;
			}
[A-Za-z][-A-Za-z0-9_]*	{
			  yylval.name =  estrdup ((const char *)yytext);
			  return IDENTIFIER;
			}
[ \t]			;
\n			{ ++lineno; }
\.\.\.			{ return ELLIPSIS; }
\.\.			{ return RANGE; }
.			{ error_message("Ignoring char(%c)\n", *yytext); }
%%

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

void
error_message (const char *format, ...)
{
     va_list args;

     va_start (args, format);
     fprintf (stderr, "%s:%d: ", get_filename(), lineno);
     vfprintf (stderr, format, args);
     va_end (args);
     error_flag++;
}

static void
handle_comment(int type)
{
    int c;
    int start_lineno = lineno;
    if(type == 0) {
	int f = 0;
	while((c = input()) != EOF) {
	    if(f && c == '-')
		return;
	    if(c == '-') {
		f = 1;
		continue;
	    }
	    if(c == '\n') {
		lineno++;
		return;
	    }
	    f = 0;
	}
    } else {
	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;
	    }
	    if(seen_star && c == '/') {
		if(--level == 0)
		    return;
		seen_star = 0;
		continue;
	    }
	    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)
{
    int start_lineno = lineno;
    int c;
    char buf[1024];
    char *p = buf;
    int f = 0;
    int skip_ws = 0;

    while((c = input()) != EOF) {
	if(isspace(c) && skip_ws) {
	    if(c == '\n')
		lineno++;
	    continue;
	}
	skip_ws = 0;

	if(c == '"') {
	    if(f) {
		*p++ = '"';
		f = 0;
	    } else
		f = 1;
	    continue;
	}
	if(f == 1) {
	    unput(c);
	    break;
	}
	if(c == '\n') {
	    lineno++;
	    while(p > buf && isspace((unsigned char)p[-1]))
		p--;
	    skip_ws = 1;
	    continue;
	}
	*p++ = c;
    }
    if(c == EOF)
	error_message("unterminated string, possibly started on line %d\n", start_lineno);
    *p++ = '\0';
    fprintf(stderr, "string -- %s\n", buf);
    return estrdup(buf);
}