smb_strcase.c revision da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Case conversion functions for strings. Originally this module only
* dealt with ASCII strings. It has been updated to support European
* character set characters. The current implementation is based on
* code page table lookup rather than simple character range checks.
*/
#ifdef _KERNEL
#else
#include <stdio.h>
#include <string.h>
#endif
#include <smbsrv/codepage.h>
#include <smbsrv/cp_cyrillic.h>
#include <smbsrv/cp_latin1.h>
#include <smbsrv/cp_latin2.h>
#include <smbsrv/cp_latin3.h>
#include <smbsrv/cp_latin4.h>
#include <smbsrv/cp_latin5.h>
#include <smbsrv/cp_latin6.h>
#include <smbsrv/cp_usascii.h>
/*
* Global pointer to the current code page. This is
* defaulted to a standard ASCII table.
*/
/*
* A flag indicating whether the codepage being used is ASCII
* When this flag is set, string opeartions can go faster.
*/
static int is_unicode = 0;
/*
* codepage_isupper
*
* Determine whether or not a character is an uppercase character.
* This function operates on the current codepage table. Returns
* non-zero if the character is uppercase. Otherwise returns zero.
*/
int
codepage_isupper(int c)
{
}
/*
* codepage_islower
*
* Determine whether or not a character is an lowercase character.
* This function operates on the current codepage table. Returns
* non-zero if the character is lowercase. Otherwise returns zero.
*/
int
codepage_islower(int c)
{
}
/*
* codepage_toupper
*
* Convert individual characters to their uppercase equivalent value.
* If the specified character is lowercase, the uppercase value will
* be returned. Otherwise the original value will be returned.
*/
int
codepage_toupper(int c)
{
}
/*
* codepage_tolower
*
* Convert individual characters to their lowercase equivalent value.
* If the specified character is uppercase, the lowercase value will
* be returned. Otherwise the original value will be returned.
*/
int
codepage_tolower(int c)
{
}
/*
* strupr
*
* Convert a string to uppercase using the appropriate codepage. The
* string is converted in place. A pointer to the string is returned.
* There is an assumption here that uppercase and lowercase values
* always result encode to the same length.
*/
char *
utf8_strupr(char *s)
{
mts_wchar_t c;
char *p = s;
while (*p) {
if (mts_isascii(*p)) {
*p = codepage_toupper(*p);
p++;
} else {
if (mts_mbtowc(&c, p, MTS_MB_CHAR_MAX) < 0)
return (0);
if (c == 0)
break;
c = codepage_toupper(c);
p += mts_wctomb(p, c);
}
}
return (s);
}
/*
* strlwr
*
* Convert a string to lowercase using the appropriate codepage. The
* string is converted in place. A pointer to the string is returned.
* There is an assumption here that uppercase and lowercase values
* always result encode to the same length.
*/
char *
utf8_strlwr(char *s)
{
mts_wchar_t c;
char *p = s;
while (*p) {
if (mts_isascii(*p)) {
*p = codepage_tolower(*p);
p++;
} else {
if (mts_mbtowc(&c, p, MTS_MB_CHAR_MAX) < 0)
return (0);
if (c == 0)
break;
c = codepage_tolower(c);
p += mts_wctomb(p, c);
}
}
return (s);
}
/*
* isstrlwr
*
* Returns 1 if string contains NO uppercase chars 0 otherwise. However,
* -1 is returned if "s" is not a valid multi-byte string.
*/
int
utf8_isstrlwr(const char *s)
{
mts_wchar_t c;
int n;
const char *p = s;
while (*p) {
if (mts_isascii(*p) && codepage_isupper(*p))
return (0);
else {
if ((n = mts_mbtowc(&c, p, MTS_MB_CHAR_MAX)) < 0)
return (-1);
if (c == 0)
break;
if (codepage_isupper(c))
return (0);
p += n;
}
}
return (1);
}
/*
* isstrupr
*
* Returns 1 if string contains NO lowercase chars 0 otherwise. However,
* -1 is returned if "s" is not a valid multi-byte string.
*/
int
utf8_isstrupr(const char *s)
{
mts_wchar_t c;
int n;
const char *p = s;
while (*p) {
if (mts_isascii(*p) && codepage_islower(*p))
return (0);
else {
if ((n = mts_mbtowc(&c, p, MTS_MB_CHAR_MAX)) < 0)
return (-1);
if (c == 0)
break;
if (codepage_islower(c))
return (0);
p += n;
}
}
return (1);
}
/*
* strcasecmp
*
* Compare the null-terminated strings s1 and s2 and return an integer
* greater than, equal to, or less than 0, according as s1 is lexico
* graphically greater than, equal to, or less than s2 after translation
* of each corresponding character to lowercase. The strings themselves
* are not modified.
*
* Out: 0 if strings are equal
* < 0 if first string < second string
* > 0 if first string > second string
*/
int
{
for (;;) {
if (mts_isascii(*p1))
else {
return (-1);
}
if (mts_isascii(*p2))
else {
return (1);
}
break;
continue;
break;
}
}
/*
* strncasecmp
*
* Compare two null-terminated strings, s1 and s2, of at most len
* characters and return an int greater than, equal to, or less than 0,
* dependent on whether s1 is lexicographically greater than, equal to,
* or less than s2 after translation of each corresponding character to
* lowercase. The original strings are not modified.
*
* Out: 0 if strings are equal
* < 0 if first string < second string
* > 0 if first string > second string
*/
int
{
if (len <= 0)
return (0);
while (len--) {
if (mts_isascii(*p1))
else {
return (-1);
}
if (mts_isascii(*p2))
else {
return (1);
}
break;
continue;
break;
}
}
int
utf8_isstrascii(const char *s)
{
while (*s) {
if (mts_isascii(*s) == 0)
return (0);
s++;
}
return (1);
}