thodg/libgit2/src/util/win32/error.c

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• Hash : c3b7ace9
  Author :
  Date : 2021-11-14T16:43:53
  

  refactor: make util an object library Instead of simply including the utility files directly, make them a cmake object library for easy reusability between other projects within libgit2. Now the top-level `src` is responsible for platform selection, while the next-level `libgit2` and `util` configurations are responsible for identifying what objects they include.

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• src/util/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 "error.h"
  
  #include "utf-conv.h"
  
  #ifdef GIT_WINHTTP
  # include <winhttp.h>
  #endif
  
  char *git_win32_get_error_message(DWORD error_code)
  {
  	LPWSTR lpMsgBuf = NULL;
  	HMODULE hModule = NULL;
  	char *utf8_msg = NULL;
  	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)) {
  		/* Convert the message to UTF-8. If this fails, we will
  		 * return NULL, which is a condition expected by the caller */
  		if (git__utf16_to_8_alloc(&utf8_msg, lpMsgBuf) < 0)
  			utf8_msg = NULL;
  
  		LocalFree(lpMsgBuf);
  	}
  
  	return utf8_msg;
  }
  

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