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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* 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 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <ctype.h>
#include "utf8_aux.h"
char utf8strcnmp(const unsigned char *s1, const unsigned char *s2,uint16_t n1,uint16_t n2, const bool casesense)
{
unsigned short c1,c2;
const unsigned char *s1p,*s2p;
s1p=s1;
s2p=s2;
for(;; )
{
if(s1p-s1==n1)
{
if(n1==n2&&n2==s2p-s2) return 0;
else return -1;
}
if(s2p-s2==n2)
{
/* printf("N1:%u,N2:%u,s1p-s1:%d\n",n1,n2,s1p-s1); */
if(n1==n2&&n1==s1p-s1) return 0;
else return 1;
}
s1p=utf8decode(s1p,&c1);
s2p=utf8decode(s2p,&c2);
if(c1==' ') c1='_';
if(c2==' ') c2='_';
/* if(s1p-s1==1&&s2p-s2==1&&c1<128&&c2<128){ */
if(!casesense && c1<128&&c2<128)
{
/* printf("TLC\n); */
c1=tolower(c1);
c2=tolower(c2);
}
if(c1<c2) return -1;
else if (c1>c2) return 1;
}
/* printf("CMPEND\n"); */
return 0; /*won't happen*/
}
/* Decode 1 UTF-8 char and return a pointer to the next char. */
const unsigned char* utf8decode(const unsigned char *utf8, unsigned short *ucs)
{
unsigned char c = *utf8++;
unsigned long code;
int tail = 0;
if ((c <= 0x7f) || (c >= 0xc2))
{
/* Start of new character. */
if (c < 0x80) /* U-00000000 - U-0000007F, 1 byte */
code = c;
else if (c < 0xe0) /* U-00000080 - U-000007FF, 2 bytes */
{
tail = 1;
code = c & 0x1f;
}
else if (c < 0xf0) /* U-00000800 - U-0000FFFF, 3 bytes */
{
tail = 2;
code = c & 0x0f;
}
else if (c < 0xf5) /* U-00010000 - U-001FFFFF, 4 bytes */
{
tail = 3;
code = c & 0x07;
}
else
/* Invalid size. */
code = 0xfffd;
while (tail-- && ((c = *utf8++) != 0))
{
if ((c & 0xc0) == 0x80)
/* Valid continuation character. */
code = (code << 6) | (c & 0x3f);
else
{
/* Invalid continuation char */
code = 0xfffd;
utf8--;
break;
}
}
}
else
/* Invalid UTF-8 char */
code = 0xfffd;
/* currently we don't support chars above U-FFFF */
*ucs = (code < 0x10000) ? code : 0xfffd;
return utf8;
}
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