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/* str.c --
* Created: Fri Aug 8 15:42:10 2003 by vle@gmx.net
* Copyright 2003 Aleksey Cheusov <vle@gmx.net>
* This program comes with ABSOLUTELY NO WARRANTY.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 1, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "dictP.h"
#include "str.h"
#include <errno.h>
/*
Copy alphanumeric and space characters converting them to lower case.
Strings are encoded using 8-bit character set.
*/
static int tolower_alnumspace_8bit (
const char *src, char *dest,
int allchars_mode,
int cs_mode)
{
int c;
for (; *src; ++src) {
c = * (const unsigned char *) src;
if (isspace (c)) {
*dest++ = ' ';
}else if (allchars_mode || isalnum (c)){
if (!cs_mode)
c = tolower (c);
*dest++ = c;
}
}
*dest = '\0';
return 0;
}
#if HAVE_UTF8
/*
Copies alphanumeric and space characters converting them to lower case.
Strings are UTF-8 encoded.
*/
static int tolower_alnumspace_utf8 (
const char *src, char *dest,
int allchars_mode,
int cs_mode)
{
wchar_t ucs4_char;
size_t len;
int len2;
mbstate_t ps;
mbstate_t ps2;
memset (&ps, 0, sizeof (ps));
memset (&ps2, 0, sizeof (ps2));
while (src && src [0]){
len = mbrtowc__ (&ucs4_char, src, MB_CUR_MAX__, &ps);
if ((int) len < 0)
return errno;
if (iswspace__ (ucs4_char)){
*dest++ = ' ';
}else if (allchars_mode || iswalnum__ (ucs4_char)){
if (!cs_mode)
ucs4_char = towlower__ (ucs4_char);
len2 = wcrtomb__ (dest, ucs4_char, &ps2);
if (len2 < 0)
return errno;
dest += len2;
}
src += len;
}
*dest = 0;
assert (strlen (src) == strlen (dest));
return (src == NULL);
}
#endif
/* returns 0 if failed */
int tolower_alnumspace (
const char *src, char *dest,
int allchars_mode,
int cs_mode,
int utf8_mode)
{
#if HAVE_UTF8
if (utf8_mode){
return tolower_alnumspace_utf8 (src, dest, allchars_mode, cs_mode);
}else{
#endif
return tolower_alnumspace_8bit (src, dest, allchars_mode, cs_mode);
#if HAVE_UTF8
}
#endif
}
char *strlwr_8bit (char *str)
{
char *p;
for (p = str; *p; ++p){
*p = tolower ((unsigned char) *p);
}
return str;
}
#if HAVE_UTF8
char *copy_utf8_string (
const char *src,
char *dest,
size_t len)
{
size_t i;
const char *p;
for (i=0; i < len; ++i){
p = src + i * (MB_CUR_MAX__ + 1);
while (*p){
*dest++ = *p++;
}
}
*dest = 0;
return dest;
}
#endif
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