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

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• Hash : cccacac5
  Author :
  Date : 2012-11-14T22:41:51
  

  Add POSIX compat lstat() variant for win32
  
  The existing p_lstat implementation on win32 is not quite POSIX
  compliant when setting errno to ENOTDIR.  This adds an option to
  make is be compliant so that code (such as checkout) that cares
  to have separate behavior for ENOTDIR can use it portably.
  
  This also contains a couple of other minor cleanups in the
  posix_w32.c implementations to avoid unnecessary work.
  

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• src/win32/utf-conv.c

• /*
   * Copyright (C) 2009-2012 the libgit2 contributors
   *
   * 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, NULL, NULL);
  }
  

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