thodg/libgit2/src/win32/utf-conv.c

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• Hash : d8563619
  Author :
  Date : 2013-08-05T11:41:39
  

  Split UTF-16 and UTF-8 buffer sizes for win32 Also fixed up call-sites to use the correct buffer sizes, especially when converting to utf-8.

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• src/win32/utf-conv.c

• /*
   * 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 length, const char *src)
  {
  	return MultiByteToWideChar(CP_UTF8, 0, src, -1, dest, (int)length);
  }
  
  int git__utf16_to_8(char *out, const wchar_t *input)
  {
  	return WideCharToMultiByte(CP_UTF8, 0, input, -1, out, GIT_WIN_PATH_UTF8, NULL, NULL);
  }
  

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