thodg/libgit2/src/common.h

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• Hash : 5540d947
  Author :
  Date : 2013-03-15T16:39:00
  

  Implement global/system file search paths The goal of this work is to expose the search logic for "global", "system", and "xdg" files through the git_libgit2_opts() interface. Behind the scenes, I changed the logic for finding files to have a notion of a git_strarray that represents a search path and to store a separate search path for each of the three tiers of config file. For each tier, I implemented a function to initialize it to default values (generally based on environment variables), and then general interfaces to get it, set it, reset it, and prepend new directories to it. Next, I exposed these interfaces through the git_libgit2_opts interface, reusing the GIT_CONFIG_LEVEL_SYSTEM, etc., constants for the user to control which search path they were modifying. There are alternative designs for the opts interface / argument ordering, so I'm putting this phase out for discussion. Additionally, I ended up doing a little bit of clean up regarding attr.h and attr_file.h, adding a new attrcache.h so the other two files wouldn't have to be included in so many places.

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• src/common.h

• /*
   * 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.
   */
  #ifndef INCLUDE_common_h__
  #define INCLUDE_common_h__
  
  #include "git2/common.h"
  #include "cc-compat.h"
  
  #include <assert.h>
  #include <errno.h>
  #include <limits.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  
  #include <sys/types.h>
  #include <sys/stat.h>
  
  #ifdef GIT_WIN32
  
  # include <io.h>
  # include <direct.h>
  # include <winsock2.h>
  # include <windows.h>
  # include "win32/msvc-compat.h"
  # include "win32/mingw-compat.h"
  # include "win32/error.h"
  # ifdef GIT_THREADS
  #	include "win32/pthread.h"
  #endif
  
  #else
  
  # include <unistd.h>
  # ifdef GIT_THREADS
  #	include <pthread.h>
  # endif
  #define GIT_STDLIB_CALL
  
  #endif
  
  #include "git2/types.h"
  #include "git2/errors.h"
  #include "thread-utils.h"
  #include "bswap.h"
  
  #include <regex.h>
  
  /**
   * Check a pointer allocation result, returning -1 if it failed.
   */
  #define GITERR_CHECK_ALLOC(ptr) if (ptr == NULL) { return -1; }
  
  /**
   * Check a return value and propogate result if non-zero.
   */
  #define GITERR_CHECK_ERROR(code) \
  	do { int _err = (code); if (_err < 0) return _err; } while (0)
  
  /**
   * Set the error message for this thread, formatting as needed.
   */
  void giterr_set(int error_class, const char *string, ...);
  
  /**
   * Set the error message for a regex failure, using the internal regex
   * error code lookup and return a libgit error code.
   */
  int giterr_set_regex(const regex_t *regex, int error_code);
  
  /**
   * Check a versioned structure for validity
   */
  GIT_INLINE(int) giterr__check_version(const void *structure, unsigned int expected_max, const char *name)
  {
  	unsigned int actual;
  
  	if (!structure)
  		return 0;
  
  	actual = *(const unsigned int*)structure;
  	if (actual > 0 && actual <= expected_max)
  		return 0;
  
  	giterr_set(GITERR_INVALID, "Invalid version %d on %s", actual, name);
  	return -1;
  }
  #define GITERR_CHECK_VERSION(S,V,N) if (giterr__check_version(S,V,N) < 0) return -1
  
  /**
   * Initialize a structure with a version.
   */
  GIT_INLINE(void) git__init_structure(void *structure, size_t len, unsigned int version)
  {
  	memset(structure, 0, len);
  	*((int*)structure) = version;
  }
  #define GIT_INIT_STRUCTURE(S,V) git__init_structure(S, sizeof(*S), V)
  
  /* NOTE: other giterr functions are in the public errors.h header file */
  
  #include "util.h"
  
  #endif /* INCLUDE_common_h__ */
  

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