thodg/libgit2/src/errors.c

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• Hash : 14997dc5
  Author :
  Date : 2013-10-08T12:45:43
  

  More filemode cleanups for FAT on MacOS
  
  This cleans up some additional issues.  The main change is that
  on a filesystem that doesn't support mode bits, libgit2 will now
  create new blobs with GIT_FILEMODE_BLOB always instead of being
  at the mercy to the filesystem driver to report executable or not.
  This means that if "core.filemode" lies and claims that filemode
  is not supported, then we will ignore the executable bit from the
  filesystem.  Previously we would have allowed it.
  
  This adds an option to the new git_repository_reset_filesystem to
  recurse through submodules if desired.  There may be other types
  of APIs that would like a "recurse submodules" option, but this
  one is particularly useful.
  
  This also has a number of cleanups, etc., for related things
  including trying to give better error messages when problems come
  up from the filesystem.  For example, the FAT filesystem driver on
  MacOS appears to return errno EINVAL if you attempt to write a
  filename with invalid UTF-8 in it.  We try to capture that with a
  better error message now.
  

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• src/errors.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 "global.h"
  #include "posix.h"
  #include "buffer.h"
  #include <stdarg.h>
  
  /********************************************
   * New error handling
   ********************************************/
  
  static git_error g_git_oom_error = {
  	"Out of memory",
  	GITERR_NOMEMORY
  };
  
  static void set_error(int error_class, char *string)
  {
  	git_error *error = &GIT_GLOBAL->error_t;
  
  	git__free(error->message);
  
  	error->message = string;
  	error->klass = error_class;
  
  	GIT_GLOBAL->last_error = error;
  }
  
  void giterr_set_oom(void)
  {
  	GIT_GLOBAL->last_error = &g_git_oom_error;
  }
  
  void giterr_set(int error_class, const char *string, ...)
  {
  	git_buf buf = GIT_BUF_INIT;
  	va_list arglist;
  #ifdef GIT_WIN32
  	DWORD win32_error_code = (error_class == GITERR_OS) ? GetLastError() : 0;
  #endif
  	int error_code = (error_class == GITERR_OS) ? errno : 0;
  
  	va_start(arglist, string);
  	git_buf_vprintf(&buf, string, arglist);
  	va_end(arglist);
  
  	if (error_class == GITERR_OS) {
  #ifdef GIT_WIN32
  		char * win32_error = git_win32_get_error_message(win32_error_code);
  		if (win32_error) {
  			git_buf_PUTS(&buf, ": ");
  			git_buf_puts(&buf, win32_error);
  			git__free(win32_error);
  
  			SetLastError(0);
  		}
  		else
  #endif
  		if (error_code) {
  			git_buf_PUTS(&buf, ": ");
  			git_buf_puts(&buf, strerror(error_code));
  		}
  
  		if (error_code)
  			errno = 0;
  	}
  
  	if (!git_buf_oom(&buf))
  		set_error(error_class, git_buf_detach(&buf));
  }
  
  void giterr_set_str(int error_class, const char *string)
  {
  	char *message;
  
  	assert(string);
  
  	message = git__strdup(string);
  
  	if (message)
  		set_error(error_class, message);
  }
  
  int giterr_set_regex(const regex_t *regex, int error_code)
  {
  	char error_buf[1024];
  
  	assert(error_code);
  
  	regerror(error_code, regex, error_buf, sizeof(error_buf));
  	giterr_set_str(GITERR_REGEX, error_buf);
  
  	if (error_code == REG_NOMATCH)
  		return GIT_ENOTFOUND;
  
  	return GIT_EINVALIDSPEC;
  }
  
  void giterr_clear(void)
  {
  	set_error(0, NULL);
  	GIT_GLOBAL->last_error = NULL;
  
  	errno = 0;
  #ifdef GIT_WIN32
  	SetLastError(0);
  #endif
  }
  
  const git_error *giterr_last(void)
  {
  	return GIT_GLOBAL->last_error;
  }
  

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