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Integrating android support.

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This commit is contained in:
Pere Pujal i Carabantes 2016-03-13 00:39:15 +01:00
parent 51f2e90c7d
commit d38b4abd68
8 changed files with 822 additions and 93 deletions
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src/android_mbstowcs.c Normal file
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/*
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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(See COPYING.txt)
*/
/*
refer to https://tools.ietf.org/html/rfc3629
Char. number range | UTF-8 octet sequence
(hexadecimal) | (binary)
--------------------+---------------------------------------------
0000 0000-0000 007F | 0xxxxxxx
0000 0080-0000 07FF | 110xxxxx 10xxxxxx
0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
*/
#include "android_mbstowcs.h"
#include <string.h>
// This implementation may be simple, but can work fine for all of Android devices
size_t mbstowcs(wchar_t * __restrict pwcs, const char * __restrict s, size_t n){
int length = strnlen (s, n);
// w is the index of pwcs, s is the index of s
int w = 0, c = 0;
while (1) {
pwcs[w] = '\0';
char first = s[c];
int len = 0;
if ((first & 0x80) == 0) {
pwcs[w] = (wchar_t)s[c];
len = 1;
}
else if ((first & 0xe0) == 0xc0) {
pwcs[w] |= first & 0x1f;
pwcs[w] <<= 6;
pwcs[w] |= s[c+1] & 0x3f;
len = 2;
}
else if ((first & 0xf0) == 0xe0) {
pwcs[w] |= first & 0x0f;
pwcs[w] <<= 6;
pwcs[w] |= s[c+1] & 0x3f;
pwcs[w] <<= 6;
pwcs[w] |= s[c+2] & 0x3f;
len = 3;
}
else if ((first & 0xf8) == 0xf0) {
pwcs[w] |= first & 0x07;
pwcs[w] <<= 6;
pwcs[w] |= s[c+1] & 0x3f;
pwcs[w] <<= 6;
pwcs[w] |= s[c+2] & 0x3f;
pwcs[w] <<= 6;
pwcs[w] |= s[c+3] & 0x3f;
len = 4;
}
else {
return -1;
}
c += len;
w++;
if (c > length){
pwcs[w] = '\0';
return -1;
}
if (c == length){
pwcs[w] = '\0';
return w;
}
}
}