X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;ds=sidebyside;f=libraries%2Flibldap%2Futf-8.c;h=8520bdb6c1b224c6559c425654d576efe7ab5ca0;hb=62295c0928c071685dbbfb98644cadaeb37333b8;hp=d25fc3036c3d34319e78034185b192cd13dc6354;hpb=19f3ba216fcd04cd6cb7a1d46fc44211bf4d2451;p=openldap
diff --git a/libraries/libldap/utf-8.c b/libraries/libldap/utf-8.c
index d25fc3036c..8520bdb6c1 100644
--- a/libraries/libldap/utf-8.c
+++ b/libraries/libldap/utf-8.c
@@ -1,11 +1,19 @@
+/* utf-8.c -- Basic UTF-8 routines */
/* $OpenLDAP$ */
-/*
- * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software .
+ *
+ * Copyright 1998-2009 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * .
*/
-
-/*
- * Basic UTF-8 routines
+/* Basic UTF-8 routines
*
* These routines are "dumb". Though they understand UTF-8,
* they don't grok Unicode. That is, they can push bits,
@@ -30,10 +38,6 @@
#include "ldap-int.h"
#include "ldap_defaults.h"
-/*
- * Basic UTF-8 routines
- */
-
/*
* return the number of bytes required to hold the
* NULL-terminated UTF-8 string NOT INCLUDING the
@@ -70,8 +74,6 @@ int ldap_utf8_offset( const char * p )
/*
* Returns length indicated by first byte.
- *
- * This function should use a table lookup.
*/
const char ldap_utf8_lentab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -88,19 +90,62 @@ int ldap_utf8_charlen( const char * p )
if (!(*p & 0x80))
return 1;
- return ldap_utf8_lentab[*(unsigned char *)p ^ 0x80];
+ return ldap_utf8_lentab[*(const unsigned char *)p ^ 0x80];
+}
+
+/*
+ * Make sure the UTF-8 char used the shortest possible encoding
+ * returns charlen if valid, 0 if not.
+ *
+ * Here are the valid UTF-8 encodings, taken from RFC 2279 page 4.
+ * The table is slightly modified from that of the RFC.
+ *
+ * UCS-4 range (hex) UTF-8 sequence (binary)
+ * 0000 0000-0000 007F 0.......
+ * 0000 0080-0000 07FF 110++++. 10......
+ * 0000 0800-0000 FFFF 1110++++ 10+..... 10......
+ * 0001 0000-001F FFFF 11110+++ 10++.... 10...... 10......
+ * 0020 0000-03FF FFFF 111110++ 10+++... 10...... 10...... 10......
+ * 0400 0000-7FFF FFFF 1111110+ 10++++.. 10...... 10...... 10...... 10......
+ *
+ * The '.' bits are "don't cares". When validating a UTF-8 sequence,
+ * at least one of the '+' bits must be set, otherwise the character
+ * should have been encoded in fewer octets. Note that in the two-octet
+ * case, only the first octet needs to be validated, and this is done
+ * in the ldap_utf8_lentab[] above.
+ */
+
+/* mask of required bits in second octet */
+#undef c
+#define c const char
+c ldap_utf8_mintab[] = {
+ (c)0x20, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80,
+ (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80,
+ (c)0x30, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80, (c)0x80,
+ (c)0x38, (c)0x80, (c)0x80, (c)0x80, (c)0x3c, (c)0x80, (c)0x00, (c)0x00 };
+#undef c
+
+int ldap_utf8_charlen2( const char * p )
+{
+ int i = LDAP_UTF8_CHARLEN( p );
+
+ if ( i > 2 ) {
+ if ( !( ldap_utf8_mintab[*p & 0x1f] & p[1] ) )
+ i = 0;
+ }
+ return i;
}
/* conv UTF-8 to UCS-4, useful for comparisons */
ldap_ucs4_t ldap_x_utf8_to_ucs4( const char * p )
{
- const unsigned char *c = p;
+ const unsigned char *c = (const unsigned char *) p;
ldap_ucs4_t ch;
int len, i;
static unsigned char mask[] = {
0, 0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
- len = LDAP_UTF8_CHARLEN(p);
+ len = LDAP_UTF8_CHARLEN2(p, len);
if( len == 0 ) return LDAP_UCS4_INVALID;
@@ -122,13 +167,22 @@ ldap_ucs4_t ldap_x_utf8_to_ucs4( const char * p )
int ldap_x_ucs4_to_utf8( ldap_ucs4_t c, char *buf )
{
int len=0;
- unsigned char* p = buf;
- if(buf == NULL) return 0;
-
- if ( c < 0 ) {
- /* not a valid Unicode character */
+ unsigned char* p = (unsigned char *) buf;
+
+ /* not a valid Unicode character */
+ if ( c < 0 ) return 0;
+
+ /* Just return length, don't convert */
+ if(buf == NULL) {
+ if( c < 0x80 ) return 1;
+ else if( c < 0x800 ) return 2;
+ else if( c < 0x10000 ) return 3;
+ else if( c < 0x200000 ) return 4;
+ else if( c < 0x4000000 ) return 5;
+ else return 6;
+ }
- } else if( c < 0x80 ) {
+ if( c < 0x80 ) {
p[len++] = c;
} else if( c < 0x800 ) {
@@ -162,10 +216,80 @@ int ldap_x_ucs4_to_utf8( ldap_ucs4_t c, char *buf )
p[len++] = 0x80 | ( c & 0x3f );
}
- buf[len] = '\0';
return len;
}
+#define LDAP_UCS_UTF8LEN(c) \
+ c < 0 ? 0 : (c < 0x80 ? 1 : (c < 0x800 ? 2 : (c < 0x10000 ? 3 : \
+ (c < 0x200000 ? 4 : (c < 0x4000000 ? 5 : 6)))))
+
+/* Convert a string to UTF-8 format. The input string is expected to
+ * have characters of 1, 2, or 4 octets (in network byte order)
+ * corresponding to the ASN.1 T61STRING, BMPSTRING, and UNIVERSALSTRING
+ * types respectively. (Here T61STRING just means that there is one
+ * octet per character and characters may use the high bit of the octet.
+ * The characters are assumed to use ISO mappings, no provision is made
+ * for converting from T.61 coding rules to Unicode.)
+ */
+
+int
+ldap_ucs_to_utf8s( struct berval *ucs, int csize, struct berval *utf8s )
+{
+ unsigned char *in, *end;
+ char *ptr;
+ ldap_ucs4_t u;
+ int i, l = 0;
+
+ utf8s->bv_val = NULL;
+ utf8s->bv_len = 0;
+
+ in = (unsigned char *)ucs->bv_val;
+
+ /* Make sure we stop at an even multiple of csize */
+ end = in + ( ucs->bv_len & ~(csize-1) );
+
+ for (; in < end; ) {
+ u = *in++;
+ if (csize > 1) {
+ u <<= 8;
+ u |= *in++;
+ }
+ if (csize > 2) {
+ u <<= 8;
+ u |= *in++;
+ u <<= 8;
+ u |= *in++;
+ }
+ i = LDAP_UCS_UTF8LEN(u);
+ if (i == 0)
+ return LDAP_INVALID_SYNTAX;
+ l += i;
+ }
+
+ utf8s->bv_val = LDAP_MALLOC( l+1 );
+ if (utf8s->bv_val == NULL)
+ return LDAP_NO_MEMORY;
+ utf8s->bv_len = l;
+
+ ptr = utf8s->bv_val;
+ for (in = (unsigned char *)ucs->bv_val; in < end; ) {
+ u = *in++;
+ if (csize > 1) {
+ u <<= 8;
+ u |= *in++;
+ }
+ if (csize > 2) {
+ u <<= 8;
+ u |= *in++;
+ u <<= 8;
+ u |= *in++;
+ }
+ ptr += ldap_x_ucs4_to_utf8(u, ptr);
+ }
+ *ptr = '\0';
+ return LDAP_SUCCESS;
+}
+
/*
* Advance to the next UTF-8 character
*
@@ -178,7 +302,7 @@ int ldap_x_ucs4_to_utf8( ldap_ucs4_t c, char *buf )
char* ldap_utf8_next( const char * p )
{
int i;
- const unsigned char *u = p;
+ const unsigned char *u = (const unsigned char *) p;
if( LDAP_UTF8_ISASCII(u) ) {
return (char *) &p[1];
@@ -205,7 +329,7 @@ char* ldap_utf8_next( const char * p )
char* ldap_utf8_prev( const char * p )
{
int i;
- const unsigned char *u = p;
+ const unsigned char *u = (const unsigned char *) p;
for( i=-1; i>-6 ; i-- ) {
if ( ( u[i] & 0xc0 ) != 0x80 ) {
@@ -229,7 +353,7 @@ char* ldap_utf8_prev( const char * p )
int ldap_utf8_copy( char* dst, const char *src )
{
int i;
- const unsigned char *u = src;
+ const unsigned char *u = (const unsigned char *) src;
dst[0] = src[0];