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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "utf-conv.h"
#define U16_LEAD(c) (wchar_t)(((c)>>10)+0xd7c0)
#define U16_TRAIL(c) (wchar_t)(((c)&0x3ff)|0xdc00)
#if 0
void git__utf8_to_16(wchar_t *dest, size_t length, const char *src)
{
wchar_t *pDest = dest;
uint32_t ch;
const uint8_t* pSrc = (uint8_t*) src;
assert(dest && src && length);
length--;
while(*pSrc && length > 0) {
ch = *pSrc++;
length--;
if(ch < 0xc0) {
/*
* ASCII, or a trail byte in lead position which is treated like
* a single-byte sequence for better character boundary
* resynchronization after illegal sequences.
*/
*pDest++ = (wchar_t)ch;
continue;
} else if(ch < 0xe0) { /* U+0080..U+07FF */
if (pSrc[0]) {
/* 0x3080 = (0xc0 << 6) + 0x80 */
*pDest++ = (wchar_t)((ch << 6) + *pSrc++ - 0x3080);
continue;
}
} else if(ch < 0xf0) { /* U+0800..U+FFFF */
if (pSrc[0] && pSrc[1]) {
/* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
/* 0x2080 = (0x80 << 6) + 0x80 */
ch = (ch << 12) + (*pSrc++ << 6);
*pDest++ = (wchar_t)(ch + *pSrc++ - 0x2080);
continue;
}
} else /* f0..f4 */ { /* U+10000..U+10FFFF */
if (length >= 1 && pSrc[0] && pSrc[1] && pSrc[2]) {
/* 0x3c82080 = (0xf0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80 */
ch = (ch << 18) + (*pSrc++ << 12);
ch += *pSrc++ << 6;
ch += *pSrc++ - 0x3c82080;
*(pDest++) = U16_LEAD(ch);
*(pDest++) = U16_TRAIL(ch);
length--; /* two bytes for this character */
continue;
}
}
/* truncated character at the end */
*pDest++ = 0xfffd;
break;
}
*pDest++ = 0x0;
}
#endif
int git__utf8_to_16(wchar_t * dest, size_t dest_size, const char *src)
{
return MultiByteToWideChar(CP_UTF8, 0, src, -1, dest, (int)dest_size);
}
int git__utf16_to_8(char *dest, size_t dest_size, const wchar_t *src)
{
return WideCharToMultiByte(CP_UTF8, 0, src, -1, dest, (int)dest_size, NULL, NULL);
}
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