kc3-lang/harfbuzz/src/hb.hh

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• Author : Behdad Esfahbod
  Date : 2022-02-04 12:38:45
  Hash : 91779537
  Message : [atexit] Allow hb_atexit redefinition Fixes https://github.com/harfbuzz/harfbuzz/issues/3412

• src/hb.hh

• /*
   * Copyright © 2007,2008,2009  Red Hat, Inc.
   * Copyright © 2011,2012  Google, Inc.
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Red Hat Author(s): Behdad Esfahbod
   * Google Author(s): Behdad Esfahbod
   */
  
  #ifndef HB_HH
  #define HB_HH
  
  
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC
  #ifdef _MSC_VER
  #pragma warning( disable: 4068 ) /* Unknown pragma */
  #endif
  #if defined(__GNUC__) || defined(__clang__)
  /* Rules:
   *
   * - All pragmas are declared GCC even if they are clang ones.  Otherwise GCC
   *   nags, even though we instruct it to ignore -Wunknown-pragmas. ¯\_(ツ)_/¯
   *
   * - Within each category, keep sorted.
   *
   * - Warnings whose scope can be expanded in future compiler versions shall
   *   be declared as "warning".  Otherwise, either ignored or error.
   */
  
  /* Setup.  Don't sort order within this category. */
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
  #pragma GCC diagnostic warning "-Wall"
  #pragma GCC diagnostic warning "-Wextra"
  #endif
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
  #pragma GCC diagnostic ignored "-Wpragmas"
  #pragma GCC diagnostic ignored "-Wunknown-pragmas"
  #pragma GCC diagnostic ignored "-Wunknown-warning-option"
  #endif
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
  //#pragma GCC diagnostic warning "-Weverything"
  #endif
  
  /* Error.  Should never happen. */
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_ERROR
  #pragma GCC diagnostic error   "-Wbitwise-instead-of-logical"
  #pragma GCC diagnostic error   "-Wcast-align"
  #pragma GCC diagnostic error   "-Wcast-function-type"
  #pragma GCC diagnostic error   "-Wdelete-non-virtual-dtor"
  #pragma GCC diagnostic error   "-Wembedded-directive"
  #pragma GCC diagnostic error   "-Wextra-semi-stmt"
  #pragma GCC diagnostic error   "-Wformat-security"
  #pragma GCC diagnostic error   "-Wimplicit-function-declaration"
  #pragma GCC diagnostic error   "-Winit-self"
  #pragma GCC diagnostic error   "-Winjected-class-name"
  #pragma GCC diagnostic error   "-Wmissing-braces"
  #pragma GCC diagnostic error   "-Wmissing-declarations"
  #pragma GCC diagnostic error   "-Wmissing-prototypes"
  #pragma GCC diagnostic error   "-Wnarrowing"
  #pragma GCC diagnostic error   "-Wnested-externs"
  #pragma GCC diagnostic error   "-Wold-style-definition"
  #pragma GCC diagnostic error   "-Wpointer-arith"
  #pragma GCC diagnostic error   "-Wredundant-decls"
  #pragma GCC diagnostic error   "-Wreorder"
  #pragma GCC diagnostic error   "-Wsign-compare"
  #pragma GCC diagnostic error   "-Wstrict-prototypes"
  #pragma GCC diagnostic error   "-Wstring-conversion"
  #pragma GCC diagnostic error   "-Wswitch-enum"
  #pragma GCC diagnostic error   "-Wtautological-overlap-compare"
  #pragma GCC diagnostic error   "-Wunneeded-internal-declaration"
  #pragma GCC diagnostic error   "-Wunused"
  #pragma GCC diagnostic error   "-Wunused-local-typedefs"
  #pragma GCC diagnostic error   "-Wunused-value"
  #pragma GCC diagnostic error   "-Wunused-variable"
  #pragma GCC diagnostic error   "-Wvla"
  #pragma GCC diagnostic error   "-Wwrite-strings"
  #endif
  
  /* Warning.  To be investigated if happens. */
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
  #pragma GCC diagnostic warning "-Wbuiltin-macro-redefined"
  #pragma GCC diagnostic warning "-Wdeprecated"
  #pragma GCC diagnostic warning "-Wdeprecated-declarations"
  #pragma GCC diagnostic warning "-Wdisabled-optimization"
  #pragma GCC diagnostic warning "-Wdouble-promotion"
  #pragma GCC diagnostic warning "-Wformat=2"
  #pragma GCC diagnostic warning "-Wignored-pragma-optimize"
  #pragma GCC diagnostic warning "-Wlogical-op"
  #pragma GCC diagnostic warning "-Wmaybe-uninitialized"
  #pragma GCC diagnostic warning "-Wmissing-format-attribute"
  #pragma GCC diagnostic warning "-Wundef"
  #pragma GCC diagnostic warning "-Wunused-but-set-variable"
  #endif
  
  /* Ignored currently, but should be fixed at some point. */
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
  #pragma GCC diagnostic ignored "-Wconversion"			// TODO fix
  #pragma GCC diagnostic ignored "-Wformat-signedness"		// TODO fix
  #pragma GCC diagnostic ignored "-Wshadow"			// TODO fix
  #pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations"	// TODO fix
  #pragma GCC diagnostic ignored "-Wunused-parameter"		// TODO fix
  #if defined(__GNUC__) && !defined(__clang__)
  #pragma GCC diagnostic ignored "-Wunused-result"		// TODO fix
  #endif
  #endif
  
  /* Ignored intentionally. */
  #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
  #pragma GCC diagnostic ignored "-Wclass-memaccess"
  #pragma GCC diagnostic ignored "-Wformat-nonliteral"
  #pragma GCC diagnostic ignored "-Wformat-zero-length"
  #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
  #pragma GCC diagnostic ignored "-Wpacked" // Erratic impl in clang
  #pragma GCC diagnostic ignored "-Wrange-loop-analysis" // https://github.com/harfbuzz/harfbuzz/issues/2834
  #pragma GCC diagnostic ignored "-Wstrict-aliasing"
  #pragma GCC diagnostic ignored "-Wtype-limits"
  #pragma GCC diagnostic ignored "-Wc++11-compat" // only gcc raises it
  #endif
  
  #endif
  #endif
  
  
  #include "hb-config.hh"
  
  
  /*
   * Following added based on what AC_USE_SYSTEM_EXTENSIONS adds to
   * config.h.in.  Copied here for the convenience of those embedding
   * HarfBuzz and not using our build system.
   */
  /* Enable extensions on AIX 3, Interix.  */
  #ifndef _ALL_SOURCE
  # define _ALL_SOURCE 1
  #endif
  /* Enable GNU extensions on systems that have them.  */
  #ifndef _GNU_SOURCE
  # define _GNU_SOURCE 1
  #endif
  /* Enable threading extensions on Solaris.  */
  #ifndef _POSIX_PTHREAD_SEMANTICS
  # define _POSIX_PTHREAD_SEMANTICS 1
  #endif
  /* Enable extensions on HP NonStop.  */
  #ifndef _TANDEM_SOURCE
  # define _TANDEM_SOURCE 1
  #endif
  /* Enable general extensions on Solaris.  */
  #ifndef __EXTENSIONS__
  # define __EXTENSIONS__ 1
  #endif
  
  #if defined (_MSC_VER) && defined (HB_DLL_EXPORT)
  #define HB_EXTERN __declspec (dllexport) extern
  #endif
  
  #include "hb.h"
  #define HB_H_IN
  #include "hb-ot.h"
  #define HB_OT_H_IN
  #include "hb-aat.h"
  #define HB_AAT_H_IN
  
  #include <cassert>
  #include <cfloat>
  #include <climits>
  #ifdef _MSC_VER
  # define _USE_MATH_DEFINES
  #endif
  #include <cmath>
  #include <cstdarg>
  #include <cstddef>
  #include <cstdio>
  #include <cstdlib>
  #include <cstring>
  
  #if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
  #ifdef __MINGW32_VERSION
  #ifndef WIN32_LEAN_AND_MEAN
  #define WIN32_LEAN_AND_MEAN 1
  #endif
  #else
  #include <intrin.h>
  #endif
  #endif
  
  #ifdef _WIN32
  #include <windows.h>
  #include <winapifamily.h>
  #endif
  
  #define HB_PASTE1(a,b) a##b
  #define HB_PASTE(a,b) HB_PASTE1(a,b)
  
  
  /* Compile-time custom allocator support. */
  
  #if !defined(HB_CUSTOM_MALLOC) \
    && defined(hb_malloc_impl) \
    && defined(hb_calloc_impl) \
    && defined(hb_realloc_impl) \
    && defined(hb_free_impl)
  #define HB_CUSTOM_MALLOC
  #endif
  
  #ifdef HB_CUSTOM_MALLOC
  extern "C" void* hb_malloc_impl(size_t size);
  extern "C" void* hb_calloc_impl(size_t nmemb, size_t size);
  extern "C" void* hb_realloc_impl(void *ptr, size_t size);
  extern "C" void  hb_free_impl(void *ptr);
  #define hb_malloc hb_malloc_impl
  #define hb_calloc hb_calloc_impl
  #define hb_realloc hb_realloc_impl
  #define hb_free hb_free_impl
  #else
  #define hb_malloc malloc
  #define hb_calloc calloc
  #define hb_realloc realloc
  #define hb_free free
  #endif
  
  
  /*
   * Compiler attributes
   */
  
  #if (defined(__GNUC__) || defined(__clang__)) && defined(__OPTIMIZE__)
  #define likely(expr) (__builtin_expect (!!(expr), 1))
  #define unlikely(expr) (__builtin_expect (!!(expr), 0))
  #else
  #define likely(expr) (expr)
  #define unlikely(expr) (expr)
  #endif
  
  #if !defined(__GNUC__) && !defined(__clang__)
  #undef __attribute__
  #define __attribute__(x)
  #endif
  
  #if defined(__GNUC__) && (__GNUC__ >= 3)
  #define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
  #else
  #define HB_PRINTF_FUNC(format_idx, arg_idx)
  #endif
  #if defined(__GNUC__) && (__GNUC__ >= 4) || (__clang__)
  #define HB_UNUSED	__attribute__((unused))
  #elif defined(_MSC_VER) /* https://github.com/harfbuzz/harfbuzz/issues/635 */
  #define HB_UNUSED __pragma(warning(suppress: 4100 4101))
  #else
  #define HB_UNUSED
  #endif
  
  #ifndef HB_INTERNAL
  # if !defined(HB_NO_VISIBILITY) && !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(_MSC_VER) && !defined(__SUNPRO_CC)
  #  define HB_INTERNAL __attribute__((__visibility__("hidden")))
  # elif defined(__MINGW32__)
     /* We use -export-symbols on mingw32, since it does not support visibility attributes. */
  #  define HB_INTERNAL
  # elif defined (_MSC_VER) && defined (HB_DLL_EXPORT)
     /* We do not try to export internal symbols on Visual Studio */
  #  define HB_INTERNAL
  #else
  #  define HB_INTERNAL
  #  define HB_NO_VISIBILITY 1
  # endif
  #endif
  
  /* https://github.com/harfbuzz/harfbuzz/issues/1651 */
  #if defined(__clang__) && __clang_major__ < 10
  #define static_const static
  #else
  #define static_const static const
  #endif
  
  #if defined(__GNUC__) && (__GNUC__ >= 3)
  #define HB_FUNC __PRETTY_FUNCTION__
  #elif defined(_MSC_VER)
  #define HB_FUNC __FUNCSIG__
  #else
  #define HB_FUNC __func__
  #endif
  
  #if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5140)
  /* https://github.com/harfbuzz/harfbuzz/issues/630 */
  #define __restrict
  #endif
  
  /*
   * Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
   * HB_FALLTHROUGH is an annotation to suppress compiler warnings about switch
   * cases that fall through without a break or return statement. HB_FALLTHROUGH
   * is only needed on cases that have code:
   *
   * switch (foo) {
   *   case 1: // These cases have no code. No fallthrough annotations are needed.
   *   case 2:
   *   case 3:
   *     foo = 4; // This case has code, so a fallthrough annotation is needed:
   *     HB_FALLTHROUGH;
   *   default:
   *     return foo;
   * }
   */
  #if defined(__clang__) && __cplusplus >= 201103L
     /* clang's fallthrough annotations are only available starting in C++11. */
  #  define HB_FALLTHROUGH [[clang::fallthrough]]
  #elif defined(__GNUC__) && (__GNUC__ >= 7)
     /* GNU fallthrough attribute is available from GCC7 */
  #  define HB_FALLTHROUGH __attribute__((fallthrough))
  #elif defined(_MSC_VER)
     /*
      * MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):
      * https://msdn.microsoft.com/en-us/library/ms235402%28VS.80%29.aspx
      */
  #  include <sal.h>
  #  define HB_FALLTHROUGH __fallthrough
  #else
  #  define HB_FALLTHROUGH /* FALLTHROUGH */
  #endif
  
  /* A tag to enforce use of return value for a function */
  #if __cplusplus >= 201703L
  #  define HB_NODISCARD [[nodiscard]]
  #elif defined(__GNUC__) || defined(__clang__)
  #  define HB_NODISCARD __attribute__((warn_unused_result))
  #elif defined(_MSC_VER)
  #  define HB_NODISCARD _Check_return_
  #else
  #  define HB_NODISCARD
  #endif
  
  /* https://github.com/harfbuzz/harfbuzz/issues/1852 */
  #if defined(__clang__) && !(defined(_AIX) && (defined(__IBMCPP__) || defined(__ibmxl__)))
  /* Disable certain sanitizer errors. */
  /* https://github.com/harfbuzz/harfbuzz/issues/1247 */
  #define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW __attribute__((no_sanitize("signed-integer-overflow")))
  #else
  #define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW
  #endif
  
  
  #ifdef _WIN32
     /* We need Windows Vista for both Uniscribe backend and for
      * MemoryBarrier.  We don't support compiling on Windows XP,
      * though we run on it fine. */
  #  if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
  #    undef _WIN32_WINNT
  #  endif
  #  ifndef _WIN32_WINNT
  #    if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  #      define _WIN32_WINNT 0x0600
  #    endif
  #  endif
  #  ifndef WIN32_LEAN_AND_MEAN
  #    define WIN32_LEAN_AND_MEAN 1
  #  endif
  #  ifndef STRICT
  #    define STRICT 1
  #  endif
  
  #  if defined(_WIN32_WCE)
       /* Some things not defined on Windows CE. */
  #    define vsnprintf _vsnprintf
  #    ifndef HB_NO_GETENV
  #      define HB_NO_GETENV
  #    endif
  #    if _WIN32_WCE < 0x800
  #      define HB_NO_SETLOCALE
  #      define HB_NO_ERRNO
  #    endif
  #  elif !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  #    ifndef HB_NO_GETENV
  #      define HB_NO_GETENV
  #    endif
  #  endif
  #  if defined(_MSC_VER) && _MSC_VER < 1900
  #    define snprintf _snprintf
  #  endif
  #endif
  
  #ifdef HB_NO_GETENV
  #define getenv(Name) nullptr
  #endif
  
  #ifndef HB_NO_ERRNO
  #  include <cerrno>
  #else
  static int HB_UNUSED _hb_errno = 0;
  #  undef errno
  #  define errno _hb_errno
  #endif
  
  #define HB_STMT_START do
  #define HB_STMT_END   while (0)
  
  #if defined(HAVE_ATEXIT) && !defined(HB_USE_ATEXIT)
  /* atexit() is only safe to be called from shared libraries on certain
   * platforms.  Whitelist.
   * https://bugs.freedesktop.org/show_bug.cgi?id=82246 */
  #  if defined(__linux) && defined(__GLIBC_PREREQ)
  #    if __GLIBC_PREREQ(2,3)
  /* From atexit() manpage, it's safe with glibc 2.2.3 on Linux. */
  #      define HB_USE_ATEXIT 1
  #    endif
  #  elif defined(_MSC_VER) || defined(__MINGW32__)
  /* For MSVC:
   * https://msdn.microsoft.com/en-us/library/tze57ck3.aspx
   * https://msdn.microsoft.com/en-us/library/zk17ww08.aspx
   * mingw32 headers say atexit is safe to use in shared libraries.
   */
  #    define HB_USE_ATEXIT 1
  #  elif defined(__ANDROID__)
  /* This is available since Android NKD r8 or r8b:
   * https://issuetracker.google.com/code/p/android/issues/detail?id=6455
   */
  #    define HB_USE_ATEXIT 1
  #  elif defined(__APPLE__)
  /* For macOS and related platforms, the atexit man page indicates
   * that it will be invoked when the library is unloaded, not only
   * at application exit.
   */
  #    define HB_USE_ATEXIT 1
  #  endif
  #endif /* defined(HAVE_ATEXIT) && !defined(HB_USE_ATEXIT) */
  #ifdef HB_NO_ATEXIT
  #  undef HB_USE_ATEXIT
  #endif
  #ifndef HB_USE_ATEXIT
  #  define HB_USE_ATEXIT 0
  #endif
  #ifndef hb_atexit
  #if !HB_USE_ATEXIT
  #  define hb_atexit(_) HB_STMT_START { if (0) (_) (); } HB_STMT_END
  #else /* HB_USE_ATEXIT */
  #  ifdef HAVE_ATEXIT
  #    define hb_atexit atexit
  #  else
       template <void (*function) (void)> struct hb_atexit_t { ~hb_atexit_t () { function (); } };
  #    define hb_atexit(f) static hb_atexit_t<f> _hb_atexit_##__LINE__;
  #  endif
  #endif
  #endif
  
  /* Lets assert int types.  Saves trouble down the road. */
  static_assert ((sizeof (hb_codepoint_t) == 4), "");
  static_assert ((sizeof (hb_position_t) == 4), "");
  static_assert ((sizeof (hb_mask_t) == 4), "");
  static_assert ((sizeof (hb_var_int_t) == 4), "");
  
  
  /* Headers we include for everyone.  Keep topologically sorted by dependency.
   * They express dependency amongst themselves, but no other file should include
   * them directly.*/
  #include "hb-meta.hh"
  #include "hb-mutex.hh"
  #include "hb-number.hh"
  #include "hb-atomic.hh"	// Requires: hb-meta
  #include "hb-null.hh"	// Requires: hb-meta
  #include "hb-algs.hh"	// Requires: hb-meta hb-null hb-number
  #include "hb-iter.hh"	// Requires: hb-algs hb-meta
  #include "hb-debug.hh"	// Requires: hb-algs hb-atomic
  #include "hb-array.hh"	// Requires: hb-algs hb-iter hb-null
  #include "hb-vector.hh"	// Requires: hb-array hb-null
  #include "hb-object.hh"	// Requires: hb-atomic hb-mutex hb-vector
  
  #endif /* HB_HH */