thodg/libgit2/src/util/git2_util.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/util/git2_util.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_git2_util_h__
  #define INCLUDE_git2_util_h__
  
  #ifndef LIBGIT2_NO_FEATURES_H
  # include "git2/sys/features.h"
  #endif
  
  #include "git2/common.h"
  #include "cc-compat.h"
  
  typedef struct git_str git_str;
  
  /** Declare a function as always inlined. */
  #if defined(_MSC_VER)
  # define GIT_INLINE(type) static __inline type
  #elif defined(__GNUC__)
  # define GIT_INLINE(type) static __inline__ type
  #else
  # define GIT_INLINE(type) static type
  #endif
  
  /** Support for gcc/clang __has_builtin intrinsic */
  #ifndef __has_builtin
  # define __has_builtin(x) 0
  #endif
  
  /**
   * Declare that a function's return value must be used.
   *
   * Used mostly to guard against potential silent bugs at runtime. This is
   * recommended to be added to functions that:
   *
   * - Allocate / reallocate memory. This prevents memory leaks or errors where
   *   buffers are expected to have grown to a certain size, but could not be
   *   resized.
   * - Acquire locks. When a lock cannot be acquired, that will almost certainly
   *   cause a data race / undefined behavior.
   */
  #if defined(__GNUC__)
  # define GIT_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
  #else
  # define GIT_WARN_UNUSED_RESULT
  #endif
  
  #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 <ws2tcpip.h>
  # include "win32/msvc-compat.h"
  # include "win32/mingw-compat.h"
  # include "win32/win32-compat.h"
  # include "win32/w32_common.h"
  # include "win32/version.h"
  # include "win32/error.h"
  # ifdef GIT_THREADS
  #  include "win32/thread.h"
  # endif
  
  #else
  
  # include <unistd.h>
  # include <strings.h>
  # ifdef GIT_THREADS
  #	include <pthread.h>
  #	include <sched.h>
  # endif
  
  #define GIT_LIBGIT2_CALL
  #define GIT_SYSTEM_CALL
  
  #ifdef GIT_USE_STAT_ATIMESPEC
  # define st_atim st_atimespec
  # define st_ctim st_ctimespec
  # define st_mtim st_mtimespec
  #endif
  
  # include <arpa/inet.h>
  
  #endif
  
  #include "git2/types.h"
  #include "git2/errors.h"
  #include "thread.h"
  #include "integer.h"
  #include "assert_safe.h"
  
  #include "posix.h"
  
  #define GIT_BUFSIZE_DEFAULT 65536
  #define GIT_BUFSIZE_FILEIO GIT_BUFSIZE_DEFAULT
  #define GIT_BUFSIZE_FILTERIO GIT_BUFSIZE_DEFAULT
  #define GIT_BUFSIZE_NETIO GIT_BUFSIZE_DEFAULT
  
  
  /**
   * Check a pointer allocation result, returning -1 if it failed.
   */
  #define GIT_ERROR_CHECK_ALLOC(ptr) do { \
  	if ((ptr) == NULL) { return -1; } \
  	} while(0)
  
  /**
   * Check a buffer allocation result, returning -1 if it failed.
   */
  #define GIT_ERROR_CHECK_ALLOC_STR(buf) do { \
  	if ((void *)(buf) == NULL || git_str_oom(buf)) { return -1; } \
  	} while(0)
  
  /**
   * Check a return value and propagate result if non-zero.
   */
  #define GIT_ERROR_CHECK_ERROR(code) \
  	do { int _err = (code); if (_err) return _err; } while (0)
  
  
  /** Check for additive overflow, setting an error if would occur. */
  #define GIT_ADD_SIZET_OVERFLOW(out, one, two) \
  	(git__add_sizet_overflow(out, one, two) ? (git_error_set_oom(), 1) : 0)
  
  /** Check for additive overflow, setting an error if would occur. */
  #define GIT_MULTIPLY_SIZET_OVERFLOW(out, nelem, elsize) \
  	(git__multiply_sizet_overflow(out, nelem, elsize) ? (git_error_set_oom(), 1) : 0)
  
  /** Check for additive overflow, failing if it would occur. */
  #define GIT_ERROR_CHECK_ALLOC_ADD(out, one, two) \
  	if (GIT_ADD_SIZET_OVERFLOW(out, one, two)) { return -1; }
  
  #define GIT_ERROR_CHECK_ALLOC_ADD3(out, one, two, three) \
  	if (GIT_ADD_SIZET_OVERFLOW(out, one, two) || \
  		GIT_ADD_SIZET_OVERFLOW(out, *(out), three)) { return -1; }
  
  #define GIT_ERROR_CHECK_ALLOC_ADD4(out, one, two, three, four) \
  	if (GIT_ADD_SIZET_OVERFLOW(out, one, two) || \
  		GIT_ADD_SIZET_OVERFLOW(out, *(out), three) || \
  		GIT_ADD_SIZET_OVERFLOW(out, *(out), four)) { return -1; }
  
  #define GIT_ERROR_CHECK_ALLOC_ADD5(out, one, two, three, four, five) \
  	if (GIT_ADD_SIZET_OVERFLOW(out, one, two) || \
  		GIT_ADD_SIZET_OVERFLOW(out, *(out), three) || \
  		GIT_ADD_SIZET_OVERFLOW(out, *(out), four) || \
  		GIT_ADD_SIZET_OVERFLOW(out, *(out), five)) { return -1; }
  
  /** Check for multiplicative overflow, failing if it would occur. */
  #define GIT_ERROR_CHECK_ALLOC_MULTIPLY(out, nelem, elsize) \
  	if (GIT_MULTIPLY_SIZET_OVERFLOW(out, nelem, elsize)) { return -1; }
  
  #include "util.h"
  
  #endif
  

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