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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/* value.c - routines for dealing with values */
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "syntax.h"
/*
* Do not use the SDK ldap_utf8isspace directly until it is faster
* than this one.
*/
static int
utf8isspace_fast( char* s )
{
register unsigned char c = *(unsigned char*)s;
if (0x80 & c) return(ldap_utf8isspace(s));
switch (c) {
case 0x09:
case 0x0A:
case 0x0B:
case 0x0C:
case 0x0D:
case 0x20:
return 1;
default: break;
}
return 0;
}
/*
** This function is used to normalizes search filter components,
** and attribute values.
**
** jcm: I added the trim_spaces flag since this function
** was incorrectly modifying search filter components. A search
** of the form "cn=a* b*" (note the space) would be wrongly
** normalized into "cn=a*b*", because this function is called
** once for "a" and once for " b".
*/
void
value_normalize(
char *s,
int syntax,
int trim_spaces
)
{
char *d;
int prevspace, curspace;
if ( ! (syntax & SYNTAX_CIS) && ! (syntax & SYNTAX_CES) ) {
return;
}
if ( syntax & SYNTAX_DN ) {
(void) slapi_dn_normalize_case( s );
return;
}
d = s;
if (trim_spaces) {
/* strip leading blanks */
while (utf8isspace_fast(s)) {
LDAP_UTF8INC(s);
}
}
/* handle value of all spaces - turn into single space */
/* unless space insensitive syntax - turn into zero length string */
if ( *s == '\0' && s != d ) {
if ( ! (syntax & SYNTAX_SI)) {
*d++ = ' ';
}
*d = '\0';
return;
}
prevspace = 0;
while ( *s ) {
curspace = utf8isspace_fast(s);
/* ignore spaces and '-' in telephone numbers */
if ( (syntax & SYNTAX_TEL) && (curspace || *s == '-') ) {
LDAP_UTF8INC(s);
continue;
}
/* ignore all spaces if this is a space insensitive value */
if ( (syntax & SYNTAX_SI) && curspace ) {
LDAP_UTF8INC(s);
continue;
}
/* compress multiple blanks */
if ( prevspace && curspace ) {
LDAP_UTF8INC(s);
continue;
}
prevspace = curspace;
if ( syntax & SYNTAX_CIS ) {
int ssz, dsz;
slapi_utf8ToLower((unsigned char*)s, (unsigned char *)d, &ssz, &dsz);
s += ssz;
d += dsz;
} else {
char *np;
int sz;
np = ldap_utf8next(s);
if (np == NULL || np == s) break;
sz = np - s;
memcpy(d,s,sz);
d += sz;
s += sz;
}
}
*d = '\0';
/* strip trailing blanks */
if (prevspace && trim_spaces) {
char *nd;
nd = ldap_utf8prev(d);
while (nd && utf8isspace_fast(nd)) {
d = nd;
nd = ldap_utf8prev(d);
*d = '\0';
}
}
}
int
value_cmp(
struct berval *v1,
struct berval *v2,
int syntax,
int normalize
)
{
int rc;
struct berval bvcopy1;
struct berval bvcopy2;
char little_buffer[64];
size_t buffer_space = sizeof(little_buffer);
int buffer_offset = 0;
int free_v1 = 0;
int free_v2 = 0;
/* This code used to call malloc up to four times in the copying
* of attributes to be normalized. Now we attempt to keep everything
* on the stack and only malloc if the data is big
*/
if ( normalize & 1 ) {
/* Do we have space in the little buffer ? */
if (v1->bv_len < buffer_space) {
bvcopy1.bv_len = v1->bv_len;
SAFEMEMCPY(&little_buffer[buffer_offset],v1->bv_val,v1->bv_len);
bvcopy1.bv_val = &little_buffer[buffer_offset];
bvcopy1.bv_val[v1->bv_len] = '\0';
v1 = &bvcopy1;
buffer_space-= v1->bv_len+1;
buffer_offset+= v1->bv_len+1;
} else {
v1 = ber_bvdup( v1 );
free_v1 = 1;
}
value_normalize( v1->bv_val, syntax, 1 /* trim leading blanks */ );
}
if ( normalize & 2 ) {
/* Do we have space in the little buffer ? */
if (v2->bv_len < buffer_space) {
bvcopy2.bv_len = v2->bv_len;
SAFEMEMCPY(&little_buffer[buffer_offset],v2->bv_val,v2->bv_len);
bvcopy2.bv_val = &little_buffer[buffer_offset];
bvcopy2.bv_val[v2->bv_len] = '\0';
v2 = &bvcopy2;
buffer_space-= v2->bv_len+1;
buffer_offset+= v2->bv_len+1;
} else {
v2 = ber_bvdup( v2 );
free_v2 = 1;
}
value_normalize( v2->bv_val, syntax, 1 /* trim leading blanks */ );
}
switch ( syntax ) {
case SYNTAX_CIS:
case (SYNTAX_CIS | SYNTAX_TEL):
case (SYNTAX_CIS | SYNTAX_DN):
case (SYNTAX_CIS | SYNTAX_SI):
rc = slapi_utf8casecmp( (unsigned char *)v1->bv_val,
(unsigned char *)v2->bv_val );
break;
case SYNTAX_CES:
rc = strcmp( v1->bv_val, v2->bv_val );
break;
}
if ( (normalize & 1) && free_v1) {
ber_bvfree( v1 );
}
if ( (normalize & 2) && free_v2) {
ber_bvfree( v2 );
}
return( rc );
}
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