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Diffstat (limited to 'thirdparty/harfbuzz/src/hb.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb.hh | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/thirdparty/harfbuzz/src/hb.hh b/thirdparty/harfbuzz/src/hb.hh new file mode 100644 index 0000000000..8ec638a2b4 --- /dev/null +++ b/thirdparty/harfbuzz/src/hb.hh @@ -0,0 +1,486 @@ +/* + * 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 "-Wcomma" +#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> +#if defined(_MSC_VER) && !defined(_USE_MATH_DEFINES) +# 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-cplusplus.hh" +#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 */ |