thodg/libgit2/src/win32/error.c

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• Hash : a7ea4095
  Author :
  Date : 2013-06-23T01:25:34
  

  Do not redefine WC_ERR_INVALID_CHARS WC_ERR_INVALID_CHARS might be already defined by the Windows SDK. Signed-off-by: Sven Strickroth <email@cs-ware.de>

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• src/win32/error.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 "error.h"
  
  #ifdef GIT_WINHTTP
  # include <winhttp.h>
  #endif
  
  #ifndef WC_ERR_INVALID_CHARS
  #define WC_ERR_INVALID_CHARS	0x80
  #endif
  
  char *git_win32_get_error_message(DWORD error_code)
  {
  	LPWSTR lpMsgBuf = NULL;
  	HMODULE hModule = NULL;
  	char *utf8_msg = NULL;
  	int utf8_size;
  	DWORD dwFlags =
  		FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS;
  
  	if (!error_code)
  		return NULL;
  
  #ifdef GIT_WINHTTP
  	/* Errors raised by WinHTTP are not in the system resource table */
  	if (error_code >= WINHTTP_ERROR_BASE &&
  		error_code <= WINHTTP_ERROR_LAST)
  		hModule = GetModuleHandleW(L"winhttp");
  #endif
  
  	GIT_UNUSED(hModule);
  
  	if (hModule)
  		dwFlags |= FORMAT_MESSAGE_FROM_HMODULE;
  	else
  		dwFlags |= FORMAT_MESSAGE_FROM_SYSTEM;
  
  	if (FormatMessageW(dwFlags, hModule, error_code,
  		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  		(LPWSTR)&lpMsgBuf, 0, NULL)) {
  
  		/* Invalid code point check supported on Vista+ only */
  		if (git_has_win32_version(6, 0))
  			dwFlags = WC_ERR_INVALID_CHARS;
  		else
  			dwFlags = 0;
  
  		utf8_size = WideCharToMultiByte(CP_UTF8, dwFlags,
  			lpMsgBuf, -1, NULL, 0, NULL, NULL);
  
  		if (!utf8_size) {
  			assert(0);
  			goto on_error;
  		}
  
  		utf8_msg = git__malloc(utf8_size);
  
  		if (!utf8_msg)
  			goto on_error;
  
  		if (!WideCharToMultiByte(CP_UTF8, dwFlags,
  			lpMsgBuf, -1, utf8_msg, utf8_size, NULL, NULL)) {
  			git__free(utf8_msg);
  			goto on_error;
  		}
  
  on_error:
  		LocalFree(lpMsgBuf);
  	}
  
  	return utf8_msg;
  }
  

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