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dsparse.c
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2000-07-29
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/* $OpenLDAP: pkg/ldap/libraries/libldap/dsparse.c,v 1.14.6.4 2000/07/29 01:53:08 kurt Exp $ */
/*
* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/* Portions
* Copyright (c) 1993, 1994 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*
* dsparse.c: parsing routines used by display template and search
* preference file library routines for LDAP clients.
*
* 7 March 1994 by Mark C Smith
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <ac/time.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include "ldap-int.h"
static int next_line LDAP_P(( char **bufp, ber_len_t *blenp, char **linep ));
static char *next_token LDAP_P(( char ** sp ));
int
ldap_int_next_line_tokens( char **bufp, ber_len_t *blenp, char ***toksp )
{
char *p, *line, *token, **toks;
int rc, tokcnt;
*toksp = NULL;
if (( rc = next_line( bufp, blenp, &line )) <= 0 ) {
return( rc );
}
if (( toks = (char **)LDAP_CALLOC( 1, sizeof( char * ))) == NULL ) {
LBER_FREE( line );
return( -1 );
}
tokcnt = 0;
p = line;
while (( token = next_token( &p )) != NULL ) {
if (( toks = (char **)LDAP_REALLOC( toks, ( tokcnt + 2 ) *
sizeof( char * ))) == NULL ) {
LBER_FREE( (char *)toks );
LBER_FREE( line );
return( -1 );
}
toks[ tokcnt ] = token;
toks[ ++tokcnt ] = NULL;
}
if ( tokcnt == 1 && strcasecmp( toks[ 0 ], "END" ) == 0 ) {
tokcnt = 0;
LDAP_VFREE( toks );
toks = NULL;
}
LBER_FREE( line );
if ( tokcnt == 0 ) {
if ( toks != NULL ) {
LBER_FREE( (char *)toks );
}
} else {
*toksp = toks;
}
return( tokcnt );
}
static int
next_line( char **bufp, ber_len_t *blenp, char **linep )
{
char *linestart, *line, *p;
ber_slen_t plen;
linestart = *bufp;
p = *bufp;
plen = *blenp;
do {
for ( linestart = p; plen > 0; ++p, --plen ) {
if ( *p == '\r' ) {
if ( plen > 1 && *(p+1) == '\n' ) {
++p;
--plen;
}
break;
}
if ( *p == '\n' ) {
if ( plen > 1 && *(p+1) == '\r' ) {
++p;
--plen;
}
break;
}
}
++p;
--plen;
} while ( plen > 0 && ( *linestart == '#' || linestart + 1 == p ));
*bufp = p;
*blenp = plen;
if ( plen <= 0 ) {
*linep = NULL;
return( 0 ); /* end of file */
}
if (( line = LDAP_MALLOC( p - linestart )) == NULL ) {
*linep = NULL;
return( -1 ); /* fatal error */
}
AC_MEMCPY( line, linestart, p - linestart );
line[ p - linestart - 1 ] = '\0';
*linep = line;
return( strlen( line ));
}
static char *
next_token( char **sp )
{
int in_quote = 0;
char *p, *tokstart, *t;
if ( **sp == '\0' ) {
return( NULL );
}
p = *sp;
while ( LDAP_SPACE( (unsigned char) *p )) { /* skip leading white space */
++p;
}
if ( *p == '\0' ) {
return( NULL );
}
if ( *p == '\"' ) {
in_quote = 1;
++p;
}
t = tokstart = p;
for ( ;; ) {
if ( *p == '\0' || ( LDAP_SPACE( (unsigned char) *p ) && !in_quote )) {
if ( *p != '\0' ) {
++p;
}
*t++ = '\0'; /* end of token */
break;
}
if ( *p == '\"' ) {
in_quote = !in_quote;
++p;
} else {
*t++ = *p++;
}
}
*sp = p;
if ( t == tokstart ) {
return( NULL );
}
return( LDAP_STRDUP( tokstart ));
}