thodg/libgit2/src/win32/w32_buffer.c

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• Hash : eba784d2
  Author :
  Date : 2015-08-05T10:19:06
  

  Fix duplicate basenames to support older VS
  
  With Visual Studio versions 2008 and older they ignore the full path to files and only check
  the basename of the file to find a collision. Additionally, having duplicate basenames can break
  other build tools like GYP.
  
  This fixes https://github.com/libgit2/libgit2/issues/3356

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• src/win32/w32_buffer.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 "w32_buffer.h"
  #include "../buffer.h"
  #include "utf-conv.h"
  
  GIT_INLINE(int) handle_wc_error(void)
  {
  	if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
  		errno = ENAMETOOLONG;
  	else
  		errno = EINVAL;
  
  	return -1;
  }
  
  int git_buf_put_w(git_buf *buf, const wchar_t *string_w, size_t len_w)
  {
  	int utf8_len, utf8_write_len;
  	size_t new_size;
  
  	if (!len_w)
  		return 0;
  
  	assert(string_w);
  
  	/* Measure the string necessary for conversion */
  	if ((utf8_len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, string_w, len_w, NULL, 0, NULL, NULL)) == 0)
  		return 0;
  
  	assert(utf8_len > 0);
  
  	GITERR_CHECK_ALLOC_ADD(&new_size, buf->size, (size_t)utf8_len);
  	GITERR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
  
  	if (git_buf_grow(buf, new_size) < 0)
  		return -1;
  
  	if ((utf8_write_len = WideCharToMultiByte(
  			CP_UTF8, WC_ERR_INVALID_CHARS, string_w, len_w, &buf->ptr[buf->size], utf8_len, NULL, NULL)) == 0)
  		return handle_wc_error();
  
  	assert(utf8_write_len == utf8_len);
  
  	buf->size += utf8_write_len;
  	buf->ptr[buf->size] = '\0';
  	return 0;
  }
  

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