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https://git.openldap.org/openldap/openldap.git
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444 lines
9.1 KiB
C
444 lines
9.1 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1998-2003 The OpenLDAP Foundation.
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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 only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include "portable.h"
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#include <ac/ctype.h>
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#include <ac/string.h>
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#include <ac/stdlib.h>
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#include <lber_pvt.h>
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#include <ldap_utf8.h>
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#include <ldap_pvt_uc.h>
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#define malloc(x) ber_memalloc_x(x,ctx)
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#define realloc(x,y) ber_memrealloc_x(x,y,ctx)
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#define free(x) ber_memfree_x(x,ctx)
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int ucstrncmp(
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const ldap_unicode_t *u1,
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const ldap_unicode_t *u2,
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ber_len_t n )
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{
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for(; 0 < n; ++u1, ++u2, --n ) {
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if( *u1 != *u2 ) {
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return *u1 < *u2 ? -1 : +1;
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}
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if ( *u1 == 0 ) {
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return 0;
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}
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}
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return 0;
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}
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int ucstrncasecmp(
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const ldap_unicode_t *u1,
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const ldap_unicode_t *u2,
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ber_len_t n )
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{
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for(; 0 < n; ++u1, ++u2, --n ) {
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ldap_unicode_t uu1 = uctolower( *u1 );
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ldap_unicode_t uu2 = uctolower( *u2 );
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if( uu1 != uu2 ) {
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return uu1 < uu2 ? -1 : +1;
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}
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if ( uu1 == 0 ) {
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return 0;
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}
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}
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return 0;
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}
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ldap_unicode_t * ucstrnchr(
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const ldap_unicode_t *u,
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ber_len_t n,
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ldap_unicode_t c )
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{
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for(; 0 < n; ++u, --n ) {
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if( *u == c ) {
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return (ldap_unicode_t *) u;
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}
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}
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return NULL;
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}
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ldap_unicode_t * ucstrncasechr(
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const ldap_unicode_t *u,
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ber_len_t n,
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ldap_unicode_t c )
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{
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c = uctolower( c );
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for(; 0 < n; ++u, --n ) {
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if( uctolower( *u ) == c ) {
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return (ldap_unicode_t *) u;
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}
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}
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return NULL;
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}
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void ucstr2upper(
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ldap_unicode_t *u,
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ber_len_t n )
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{
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for(; 0 < n; ++u, --n ) {
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*u = uctoupper( *u );
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}
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}
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struct berval * UTF8bvnormalize(
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struct berval *bv,
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struct berval *newbv,
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unsigned flags,
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void *ctx )
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{
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int i, j, len, clen, outpos, ucsoutlen, outsize, last;
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char *out, *outtmp, *s;
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unsigned long *ucs, *p, *ucsout;
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static unsigned char mask[] = {
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0, 0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
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unsigned casefold = flags & LDAP_UTF8_CASEFOLD;
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unsigned approx = flags & LDAP_UTF8_APPROX;
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if ( bv == NULL ) {
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return NULL;
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}
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s = bv->bv_val;
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len = bv->bv_len;
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if ( len == 0 ) {
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return ber_dupbv_x( newbv, bv, ctx );
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}
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/* Should first check to see if string is already in proper
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* normalized form. This is almost as time consuming as
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* the normalization though.
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*/
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/* finish off everything up to character before first non-ascii */
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if ( LDAP_UTF8_ISASCII( s ) ) {
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if ( casefold ) {
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outsize = len + 7;
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out = (char *) malloc( outsize );
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if ( out == NULL ) {
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return NULL;
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}
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outpos = 0;
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for ( i = 1; (i < len) && LDAP_UTF8_ISASCII(s + i); i++ ) {
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out[outpos++] = TOLOWER( s[i-1] );
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}
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if ( i == len ) {
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out[outpos++] = TOLOWER( s[len-1] );
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out[outpos] = '\0';
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return ber_str2bv( out, outpos, 0, newbv);
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}
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} else {
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for ( i = 1; (i < len) && LDAP_UTF8_ISASCII(s + i); i++ ) {
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/* empty */
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}
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if ( i == len ) {
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return ber_str2bv_x( s, len, 1, newbv, ctx );
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}
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outsize = len + 7;
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out = (char *) malloc( outsize );
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if ( out == NULL ) {
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return NULL;
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}
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outpos = i - 1;
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memcpy(out, s, outpos);
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}
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} else {
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outsize = len + 7;
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out = (char *) malloc( outsize );
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if ( out == NULL ) {
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return NULL;
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}
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outpos = 0;
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i = 0;
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}
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p = ucs = malloc( len * sizeof(*ucs) );
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if ( ucs == NULL ) {
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free(out);
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return NULL;
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}
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/* convert character before first non-ascii to ucs-4 */
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if ( i > 0 ) {
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*p = casefold ? TOLOWER( s[i-1] ) : s[i-1];
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p++;
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}
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/* s[i] is now first non-ascii character */
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for (;;) {
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/* s[i] is non-ascii */
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/* convert everything up to next ascii to ucs-4 */
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while ( i < len ) {
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clen = LDAP_UTF8_CHARLEN2( s + i, clen );
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if ( clen == 0 ) {
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free( ucs );
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free( out );
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return NULL;
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}
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if ( clen == 1 ) {
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/* ascii */
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break;
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}
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*p = s[i] & mask[clen];
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i++;
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for( j = 1; j < clen; j++ ) {
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if ( (s[i] & 0xc0) != 0x80 ) {
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free( ucs );
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free( out );
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return NULL;
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}
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*p <<= 6;
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*p |= s[i] & 0x3f;
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i++;
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}
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if ( casefold ) {
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*p = uctolower( *p );
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}
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p++;
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}
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/* normalize ucs of length p - ucs */
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uccompatdecomp( ucs, p - ucs, &ucsout, &ucsoutlen, ctx );
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if ( approx ) {
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for ( j = 0; j < ucsoutlen; j++ ) {
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if ( ucsout[j] < 0x80 ) {
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out[outpos++] = ucsout[j];
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}
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}
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} else {
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ucsoutlen = uccanoncomp( ucsout, ucsoutlen );
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/* convert ucs to utf-8 and store in out */
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for ( j = 0; j < ucsoutlen; j++ ) {
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/* allocate more space if not enough room for
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6 bytes and terminator */
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if ( outsize - outpos < 7 ) {
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outsize = ucsoutlen - j + outpos + 6;
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outtmp = (char *) realloc( out, outsize );
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if ( outtmp == NULL ) {
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free( out );
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free( ucs );
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free( ucsout );
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return NULL;
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}
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out = outtmp;
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}
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outpos += ldap_x_ucs4_to_utf8( ucsout[j], &out[outpos] );
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}
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}
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free( ucsout );
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ucsout = NULL;
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if ( i == len ) {
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break;
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}
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last = i;
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/* Allocate more space in out if necessary */
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if (len - i >= outsize - outpos) {
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outsize += 1 + ((len - i) - (outsize - outpos));
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outtmp = (char *) realloc(out, outsize);
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if (outtmp == NULL) {
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free(out);
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free(ucs);
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return NULL;
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}
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out = outtmp;
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}
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/* s[i] is ascii */
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/* finish off everything up to char before next non-ascii */
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for ( i++; (i < len) && LDAP_UTF8_ISASCII(s + i); i++ ) {
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out[outpos++] = casefold ? TOLOWER( s[i-1] ) : s[i-1];
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}
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if ( i == len ) {
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out[outpos++] = casefold ? TOLOWER( s[len-1] ) : s[len-1];
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break;
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}
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/* convert character before next non-ascii to ucs-4 */
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*ucs = casefold ? TOLOWER( s[i-1] ) : s[i-1];
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p = ucs + 1;
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}
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free( ucs );
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out[outpos] = '\0';
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return ber_str2bv( out, outpos, 0, newbv );
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}
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/* compare UTF8-strings, optionally ignore casing */
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/* slow, should be optimized */
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int UTF8bvnormcmp(
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struct berval *bv1,
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struct berval *bv2,
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unsigned flags,
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void *ctx )
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{
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int i, l1, l2, len, ulen, res = 0;
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char *s1, *s2, *done;
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unsigned long *ucs, *ucsout1, *ucsout2;
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unsigned casefold = flags & LDAP_UTF8_CASEFOLD;
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unsigned norm1 = flags & LDAP_UTF8_ARG1NFC;
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unsigned norm2 = flags & LDAP_UTF8_ARG2NFC;
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if (bv1 == NULL) {
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return bv2 == NULL ? 0 : -1;
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} else if (bv2 == NULL) {
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return 1;
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}
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l1 = bv1->bv_len;
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l2 = bv2->bv_len;
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len = (l1 < l2) ? l1 : l2;
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if (len == 0) {
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return l1 == 0 ? (l2 == 0 ? 0 : -1) : 1;
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}
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s1 = bv1->bv_val;
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s2 = bv2->bv_val;
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done = s1 + len;
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while ( (s1 < done) && LDAP_UTF8_ISASCII(s1) && LDAP_UTF8_ISASCII(s2) ) {
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if (casefold) {
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char c1 = TOLOWER(*s1);
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char c2 = TOLOWER(*s2);
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res = c1 - c2;
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} else {
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res = *s1 - *s2;
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}
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s1++;
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s2++;
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if (res) {
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/* done unless next character in s1 or s2 is non-ascii */
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if (s1 < done) {
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if (!LDAP_UTF8_ISASCII(s1) || !LDAP_UTF8_ISASCII(s2)) {
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break;
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}
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} else if (((len < l1) && !LDAP_UTF8_ISASCII(s1)) ||
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((len < l2) && !LDAP_UTF8_ISASCII(s2)))
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{
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break;
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}
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return res;
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}
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}
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/* We have encountered non-ascii or strings equal up to len */
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/* set i to number of iterations */
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i = s1 - done + len;
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/* passed through loop at least once? */
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if (i > 0) {
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if (!res && (s1 == done) &&
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((len == l1) || LDAP_UTF8_ISASCII(s1)) &&
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((len == l2) || LDAP_UTF8_ISASCII(s2))) {
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/* all ascii and equal up to len */
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return l1 - l2;
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}
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/* rewind one char, and do normalized compare from there */
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s1--;
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s2--;
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l1 -= i - 1;
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l2 -= i - 1;
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}
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/* Should first check to see if strings are already in
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* proper normalized form.
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*/
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ucs = malloc( ( ( norm1 || l1 > l2 ) ? l1 : l2 ) * sizeof(*ucs) );
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if ( ucs == NULL ) {
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return l1 > l2 ? 1 : -1; /* what to do??? */
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}
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/*
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* XXYYZ: we convert to ucs4 even though -llunicode
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* expects ucs2 in an unsigned long
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*/
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/* convert and normalize 1st string */
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for ( i = 0, ulen = 0; i < l1; i += len, ulen++ ) {
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ucs[ulen] = ldap_x_utf8_to_ucs4( s1 + i );
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if ( ucs[ulen] == LDAP_UCS4_INVALID ) {
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free( ucs );
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return -1; /* what to do??? */
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}
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len = LDAP_UTF8_CHARLEN( s1 + i );
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}
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if ( norm1 ) {
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ucsout1 = ucs;
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l1 = ulen;
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ucs = malloc( l2 * sizeof(*ucs) );
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if ( ucs == NULL ) {
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return l1 > l2 ? 1 : -1; /* what to do??? */
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}
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} else {
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uccompatdecomp( ucs, ulen, &ucsout1, &l1, ctx );
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l1 = uccanoncomp( ucsout1, l1 );
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}
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/* convert and normalize 2nd string */
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for ( i = 0, ulen = 0; i < l2; i += len, ulen++ ) {
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ucs[ulen] = ldap_x_utf8_to_ucs4( s2 + i );
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if ( ucs[ulen] == LDAP_UCS4_INVALID ) {
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free( ucsout1 );
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free( ucs );
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return 1; /* what to do??? */
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}
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len = LDAP_UTF8_CHARLEN( s2 + i );
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}
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if ( norm2 ) {
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ucsout2 = ucs;
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l2 = ulen;
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} else {
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uccompatdecomp( ucs, ulen, &ucsout2, &l2, ctx );
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l2 = uccanoncomp( ucsout2, l2 );
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free( ucs );
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}
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res = casefold
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? ucstrncasecmp( ucsout1, ucsout2, l1 < l2 ? l1 : l2 )
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: ucstrncmp( ucsout1, ucsout2, l1 < l2 ? l1 : l2 );
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free( ucsout1 );
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free( ucsout2 );
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if ( res != 0 ) {
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return res;
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}
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if ( l1 == l2 ) {
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return 0;
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}
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return l1 > l2 ? 1 : -1;
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}
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