thodg/libgit2/src/errors.c

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• Hash : d85296ab
  Author :
  Date : 2013-03-14T13:50:54
  

  Fix valgrind issues (and mmap fallback for diff)
  
  This fixes a number of issues identified by valgrind - mostly
  missed free calls.  Inside valgrind, mmap() may fail which causes
  some of the diff tests to fail.  This adds a fallback code path
  to diff_output.c:get_workdir_content() where is the mmap() fails
  the code will now try to read the file data directly into allocated
  memory (which is what it would do if the data needed to be filtered
  anyhow).
  

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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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