thodg/libgit2/src/libgit2/common.h

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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/libgit2/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_util.h"
  #include "errors.h"
  
  /*
  * Include the declarations for deprecated functions; this ensures
  * that they're decorated with the proper extern/visibility attributes.
  */
  #include "git2/deprecated.h"
  
  #include "posix.h"
  
  /**
   * 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)
  
  #define GIT_INIT_STRUCTURE_FROM_TEMPLATE(PTR,VERSION,TYPE,TPL) do { \
  	TYPE _tmpl = TPL; \
  	GIT_ERROR_CHECK_VERSION(&(VERSION), _tmpl.version, #TYPE);      \
  	memcpy((PTR), &_tmpl, sizeof(_tmpl)); } while (0)
  
  /**
   * Check a versioned structure for validity
   */
  GIT_INLINE(int) git_error__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;
  
  	git_error_set(GIT_ERROR_INVALID, "invalid version %d on %s", actual, name);
  	return -1;
  }
  #define GIT_ERROR_CHECK_VERSION(S,V,N) if (git_error__check_version(S,V,N) < 0) return -1
  
  #endif
  

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