thodg/libgit2/src/common.h

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• Hash : 42d5f110
  Author :
  Date : 2020-12-08T14:33:31
  

  win32: provide macros for calling conventions Provide more clarity for Win32 calling conventions - now that we always compile to __cdecl on Win32, we'll define that as the the libgit2 calling convention. Also offer NTAPI (__stdcall) calling conventions for things that need callbacks from NTAPI code (eg fiber-local storage).

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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__
  
  #ifndef LIBGIT2_NO_FEATURES_H
  # include "git2/sys/features.h"
  #endif
  
  #include "git2/common.h"
  #include "cc-compat.h"
  
  /** 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
  
  #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/w32_common.h"
  # include "win32/win32-compat.h"
  # include "win32/error.h"
  # include "win32/version.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 "errors.h"
  #include "thread.h"
  #include "integer.h"
  #include "assert_safe.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"
  
  #define DEFAULT_BUFSIZE 65536
  #define FILEIO_BUFSIZE DEFAULT_BUFSIZE
  #define FILTERIO_BUFSIZE DEFAULT_BUFSIZE
  #define NETIO_BUFSIZE DEFAULT_BUFSIZE
  
  /**
   * Check a pointer allocation result, returning -1 if it failed.
   */
  #define GIT_ERROR_CHECK_ALLOC(ptr) if (ptr == NULL) { return -1; }
  
  /**
   * Check a buffer allocation result, returning -1 if it failed.
   */
  #define GIT_ERROR_CHECK_ALLOC_BUF(buf) if ((void *)(buf) == NULL || git_buf_oom(buf)) { return -1; }
  
  /**
   * 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 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
  
  /**
   * 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 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; }
  
  /* NOTE: other git_error functions are in the public errors.h header file */
  
  #include "util.h"
  
  #endif
  

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