/* $OpenLDAP$ */
/*
- * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/*
* Basic UTF-8 routines
*
+ * These routines are "dumb". Though they understand UTF-8,
+ * they don't grok Unicode. That is, they can push bits,
+ * but don't have a clue what the bits represent. That's
+ * good enough for use with the LDAP Client SDK.
+ *
* These routines are not optimized.
*/
#include <ac/string.h>
#include <ac/time.h>
+#include "ldap_utf8.h"
+
#include "ldap-int.h"
#include "ldap_defaults.h"
-#define UTF8_ISASCII(u) ( !((u) & ~0x7f) )
-#define UCS4_INVALID 0x80000000U
+#undef LDAP_IS_ASCII
+#define LDAP_IS_ASCII(uc) ((uc) < 0x80)
+
+/*
+ * Basic UTF-8 routines
+ */
/*
* return the number of bytes required to hold the
- * NULL-terminated UTF-8 string INCLUDING the
+ * NULL-terminated UTF-8 string NOT INCLUDING the
* termination.
*/
ber_len_t ldap_utf8_bytes( const char * p )
{
- ber_len_t bytes = 0;
+ ber_len_t bytes;
- if( p == NULL ) return bytes;
-
- while( p[bytes++] ) {
+ for( bytes=0; p[bytes]; bytes++ ) {
/* EMPTY */ ;
}
ber_len_t ldap_utf8_chars( const char * p )
{
/* could be optimized and could check for invalid sequences */
- ber_len_t chars;
-
- for( chars=0; *p ; chars++ ) {
- int charlen = ldap_utf8_charlen( p );
+ ber_len_t chars=0;
- if( !charlen ) return chars;
-
- p = &p[charlen];
+ for( ; *p ; LDAP_UTF8_INCR(p) ) {
+ chars++;
};
return chars;
}
+/* return offset to next character */
+int ldap_utf8_offset( const char * p )
+{
+ return LDAP_UTF8_NEXT(p) - p;
+}
+
+/*
+ * Returns length indicated by first byte.
+ *
+ * This function should use a table lookup.
+ */
int ldap_utf8_charlen( const char * p )
{
unsigned c = * (const unsigned char *) p;
return 1;
}
-ber_int_t ldap_utf8_to_ucs4( const char * p )
+/* 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;
+ ldap_ucs4_t ch;
int len, i;
- ber_int_t c = * (const unsigned char *) p;
+ static unsigned char mask[] = {
+ 0, 0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
- if ((c & 0xFE ) == 0xFC) {
- len = 6;
- c &= 0x01;
+ len = LDAP_UTF8_CHARLEN(p);
- } else if ((c & 0xFC ) == 0xF8) {
- len = 5;
- c &= 0x03;
+ if( len == 0 ) return LDAP_UCS4_INVALID;
- } else if ((c & 0xF8 ) == 0xF0) {
- len = 4;
- c &= 0x07;
-
- } else if ((c & 0xF0 ) == 0xE0) {
- len = 3;
- c &= 0x0F;
-
- } else if ((c & 0xE0 ) == 0xC0) {
- len = 2;
- c &= 0x1F;
-
- } else if ((c & 0x80 ) == 0x80) {
- return UCS4_INVALID;
-
- } else {
- return c;
- }
+ ch = c[0] & mask[len];
for(i=1; i < len; i++) {
- ber_int_t ch = ((const unsigned char *) p)[i];
-
- if ((ch & 0xc0) != 0x80) {
- return UCS4_INVALID;
+ if ((c[i] & 0xc0) != 0x80) {
+ return LDAP_UCS4_INVALID;
}
- c <<= 6;
- c |= ch & 0x3f;
+ ch <<= 6;
+ ch |= c[i] & 0x3f;
}
- return c;
+ return ch;
}
-int ldap_ucs4_to_utf8( ber_int_t c, char *buf )
+/* conv UCS-4 to UTF-8, not used */
+int ldap_x_ucs4_to_utf8( ldap_ucs4_t c, char *buf )
{
int len=0;
unsigned char* p = buf;
} else if( c < 0x800 ) {
p[len++] = 0xc0 | ( c >> 6 );
- p[len++] = 0x80 | ( c & 0x3F );
+ p[len++] = 0x80 | ( c & 0x3f );
} else if( c < 0x10000 ) {
p[len++] = 0xe0 | ( c >> 12 );
- p[len++] = 0x80 | ( (c >> 6) & 0x3F );
- p[len++] = 0x80 | ( c & 0x3F );
+ p[len++] = 0x80 | ( (c >> 6) & 0x3f );
+ p[len++] = 0x80 | ( c & 0x3f );
} else if( c < 0x200000 ) {
p[len++] = 0xf0 | ( c >> 18 );
- p[len++] = 0x80 | ( (c >> 12) & 0x3F );
- p[len++] = 0x80 | ( (c >> 6) & 0x3F );
- p[len++] = 0x80 | ( c & 0x3F );
+ p[len++] = 0x80 | ( (c >> 12) & 0x3f );
+ p[len++] = 0x80 | ( (c >> 6) & 0x3f );
+ p[len++] = 0x80 | ( c & 0x3f );
- } else if( c < 0x400000 ) {
+ } else if( c < 0x4000000 ) {
p[len++] = 0xf8 | ( c >> 24 );
- p[len++] = 0x80 | ( (c >> 18) & 0x3F );
- p[len++] = 0x80 | ( (c >> 12) & 0x3F );
- p[len++] = 0x80 | ( (c >> 6) & 0x3F );
- p[len++] = 0x80 | ( c & 0x3F );
+ p[len++] = 0x80 | ( (c >> 18) & 0x3f );
+ p[len++] = 0x80 | ( (c >> 12) & 0x3f );
+ p[len++] = 0x80 | ( (c >> 6) & 0x3f );
+ p[len++] = 0x80 | ( c & 0x3f );
} else /* if( c < 0x80000000 ) */ {
p[len++] = 0xfc | ( c >> 30 );
- p[len++] = 0x80 | ( (c >> 24) & 0x3F );
- p[len++] = 0x80 | ( (c >> 18) & 0x3F );
- p[len++] = 0x80 | ( (c >> 12) & 0x3F );
- p[len++] = 0x80 | ( (c >> 6) & 0x3F );
- p[len++] = 0x80 | ( c & 0x3F );
+ p[len++] = 0x80 | ( (c >> 24) & 0x3f );
+ p[len++] = 0x80 | ( (c >> 18) & 0x3f );
+ p[len++] = 0x80 | ( (c >> 12) & 0x3f );
+ p[len++] = 0x80 | ( (c >> 6) & 0x3f );
+ p[len++] = 0x80 | ( c & 0x3f );
}
buf[len] = '\0';
return len;
}
+/*
+ * Advance to the next UTF-8 character
+ *
+ * Ignores length of multibyte character, instead rely on
+ * continuation markers to find start of next character.
+ * This allows for "resyncing" of when invalid characters
+ * are provided provided the start of the next character
+ * is appears within the 6 bytes examined.
+ */
char* ldap_utf8_next( const char * p )
{
- int len = ldap_utf8_charlen( p );
+ int i;
+ const unsigned char *u = p;
+
+ if( LDAP_UTF8_ISASCII(u) ) {
+ return (char *) &p[1];
+ }
+
+ for( i=1; i<6; i++ ) {
+ if ( ( u[i] & 0xc0 ) != 0x80 ) {
+ return (char *) &p[i];
+ }
+ }
- return len ? (char *) &p[len] : NULL;
+ return (char *) &p[i];
}
+/*
+ * Advance to the previous UTF-8 character
+ *
+ * Ignores length of multibyte character, instead rely on
+ * continuation markers to find start of next character.
+ * This allows for "resyncing" of when invalid characters
+ * are provided provided the start of the next character
+ * is appears within the 6 bytes examined.
+ */
char* ldap_utf8_prev( const char * p )
{
int i;
const unsigned char *u = p;
- for( i = -1; i >= -6 ; i-- ) {
- if ( u[i] & 0xC0 != 0x80 ) return (char *) &p[i];
+ for( i=-1; i>-6 ; i-- ) {
+ if ( ( u[i] & 0xc0 ) != 0x80 ) {
+ return (char *) &p[i];
+ }
}
- return NULL;
+ return (char *) &p[i];
+}
+
+/*
+ * Copy one UTF-8 character from src to dst returning
+ * number of bytes copied.
+ *
+ * Ignores length of multibyte character, instead rely on
+ * continuation markers to find start of next character.
+ * This allows for "resyncing" of when invalid characters
+ * are provided provided the start of the next character
+ * is appears within the 6 bytes examined.
+ */
+int ldap_utf8_copy( char* dst, const char *src )
+{
+ int i;
+ const unsigned char *u = src;
+
+ dst[0] = src[0];
+
+ if( LDAP_UTF8_ISASCII(u) ) {
+ return 1;
+ }
+
+ for( i=1; i<6; i++ ) {
+ if ( ( u[i] & 0xc0 ) != 0x80 ) {
+ return i;
+ }
+ dst[i] = src[i];
+ }
+
+ return i;
}
+/*
+ * UTF-8 ctype routines
+ * Only deals with characters < 0x80 (ie: US-ASCII)
+ */
+
int ldap_utf8_isascii( const char * p )
{
unsigned c = * (const unsigned char *) p;
- return UTF8_ISASCII(c);
+ return LDAP_IS_ASCII(c);
}
int ldap_utf8_isdigit( const char * p )
{
unsigned c = * (const unsigned char *) p;
- if(!UTF8_ISASCII(c)) return 0;
+ if(!LDAP_IS_ASCII(c)) return 0;
return c >= '0' && c <= '9';
}
{
unsigned c = * (const unsigned char *) p;
- if(!UTF8_ISASCII(c)) return 0;
+ if(!LDAP_IS_ASCII(c)) return 0;
return ( c >= '0' && c <= '9' )
|| ( c >= 'A' && c <= 'F' )
|| ( c >= 'a' && c <= 'f' );
}
+int ldap_utf8_isspace( const char * p )
+{
+ unsigned c = * (const unsigned char *) p;
+
+ if(!LDAP_IS_ASCII(c)) return 0;
+
+ switch(c) {
+ case ' ':
+ case '\t':
+ case '\n':
+ case '\r':
+ case '\v':
+ case '\f':
+ return 1;
+ }
+
+ return 0;
+}
+
+#ifndef UTF8_ALPHA_CTYPE
+/*
+ * These are not needed by the C SDK and are
+ * not "good enough" for general use.
+ */
int ldap_utf8_isalpha( const char * p )
{
unsigned c = * (const unsigned char *) p;
- if(!UTF8_ISASCII(c)) return 0;
+ if(!LDAP_IS_ASCII(c)) return 0;
return ( c >= 'A' && c <= 'Z' )
|| ( c >= 'a' && c <= 'z' );
{
unsigned c = * (const unsigned char *) p;
- if(!UTF8_ISASCII(c)) return 0;
+ if(!LDAP_IS_ASCII(c)) return 0;
return ( c >= '0' && c <= '9' )
|| ( c >= 'A' && c <= 'Z' )
{
unsigned c = * (const unsigned char *) p;
- if(!UTF8_ISASCII(c)) return 0;
+ if(!LDAP_IS_ASCII(c)) return 0;
return ( c >= 'a' && c <= 'z' );
}
{
unsigned c = * (const unsigned char *) p;
- if(!UTF8_ISASCII(c)) return 0;
+ if(!LDAP_IS_ASCII(c)) return 0;
return ( c >= 'A' && c <= 'Z' );
}
+#endif
-int ldap_utf8_isspace( const char * p )
-{
- unsigned c = * (const unsigned char *) p;
-
- if(!UTF8_ISASCII(c)) return 0;
- switch(c) {
- case ' ':
- case '\t':
- case '\n':
- case '\r':
- case '\v':
- case '\f':
- return 1;
- }
-
- return 0;
-}
+/*
+ * UTF-8 string routines
+ */
-char* ldap_utf8_fgetc( FILE *s, char *buf )
+/* like strchr() */
+char * (ldap_utf8_strchr)( const char *str, const char *chr )
{
- int i;
- unsigned char *p;
- unsigned int c;
- int len;
-
- if( s == NULL ) return NULL;
-
- p = buf;
-
- c = fgetc( s );
- if( c == EOF ) {
- p[0] = -1;
- return NULL;
+ for( ; *str != '\0'; LDAP_UTF8_INCR(str) ) {
+ if( ldap_x_utf8_to_ucs4( str ) == ldap_x_utf8_to_ucs4( chr ) ) {
+ return (char *) str;
+ }
}
- p[0] = c;
-
- len = ldap_utf8_charlen( buf );
-
- if( len < 1 ) return NULL;
-
- for( i = 1; i < len; i++ ) {
- unsigned int c = fgetc( s );
- if( c == EOF ) {
- p[i] = -1;
- return NULL;
- }
- if( c & 0xC0 != 0x80 ) {
- ungetc( c, s );
- p[i] = -1;
- return NULL;
- }
- p[i] = c;
- }
-
- return buf;
+ return NULL;
}
+/* like strcspn() but returns number of bytes, not characters */
ber_len_t (ldap_utf8_strcspn)( const char *str, const char *set )
{
- int len;
const char *cstr;
+ const char *cset;
- for( cstr = str; *cstr != '\0'; cstr += len ) {
- const char *cset;
-
- for( cset = set; ; cset += len ) {
- if( ldap_utf8_to_ucs4( cstr ) == ldap_utf8_to_ucs4( cset ) ) {
+ for( cstr = str; *cstr != '\0'; LDAP_UTF8_INCR(cstr) ) {
+ for( cset = set; *cset != '\0'; LDAP_UTF8_INCR(cset) ) {
+ if( ldap_x_utf8_to_ucs4( cstr ) == ldap_x_utf8_to_ucs4( cset ) ) {
return cstr - str;
}
-
- len = ldap_utf8_charlen(cset);
- if( !len ) break;
}
-
- len = ldap_utf8_charlen(cstr);
- if( !len ) break;
}
return cstr - str;
}
+/* like strspn() but returns number of bytes, not characters */
ber_len_t (ldap_utf8_strspn)( const char *str, const char *set )
{
- int len;
const char *cstr;
+ const char *cset;
- for( cstr = str; *cstr != '\0'; cstr += len ) {
- const char *cset;
-
- for( cset = set; ; cset += len ) {
+ for( cstr = str; *cstr != '\0'; LDAP_UTF8_INCR(cstr) ) {
+ for( cset = set; ; LDAP_UTF8_INCR(cset) ) {
if( *cset == '\0' ) {
return cstr - str;
}
- if( ldap_utf8_to_ucs4( cstr ) == ldap_utf8_to_ucs4( cset ) ) {
+ if( ldap_x_utf8_to_ucs4( cstr ) == ldap_x_utf8_to_ucs4( cset ) ) {
break;
}
-
- len = ldap_utf8_charlen(cset);
- if( !len ) break;
}
-
- len = ldap_utf8_charlen(cstr);
- if( !len ) break;
}
return cstr - str;
}
+/* like strpbrk(), replaces strchr() as well */
char *(ldap_utf8_strpbrk)( const char *str, const char *set )
{
- int len;
- const char *cstr;
-
- for( cstr = str; *cstr != '\0'; cstr += len ) {
+ for( ; *str != '\0'; LDAP_UTF8_INCR(str) ) {
const char *cset;
- for( cset = set; ; cset += len ) {
- if( ldap_utf8_to_ucs4( cstr ) == ldap_utf8_to_ucs4( cset ) ) {
- return cstr;
+ for( cset = set; *cset != '\0'; LDAP_UTF8_INCR(cset) ) {
+ if( ldap_x_utf8_to_ucs4( str ) == ldap_x_utf8_to_ucs4( cset ) ) {
+ return (char *) str;
}
-
- len = ldap_utf8_charlen(cset);
- if( !len ) break;
}
-
- len = ldap_utf8_charlen(cstr);
- if( !len ) break;
}
return NULL;
}
+/* like strtok_r(), not strtok() */
char *(ldap_utf8_strtok)(char *str, const char *sep, char **last)
{
char *begin;
return NULL;
}
- end = &begin[ ldap_utf8_strcpn( begin, sep ) ];
+ end = &begin[ ldap_utf8_strcspn( begin, sep ) ];
if( *end != '\0' ) {
- int len = ldap_utf8_charlen( end );
+ char *next = LDAP_UTF8_NEXT( end );
*end = '\0';
-
- if( len ) {
- end += len;
- } else {
- end = NULL;
- }
+ end = next;
}
*last = end;
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