481 lines
14 KiB
C++
481 lines
14 KiB
C++
/*
|
|
* 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
|
|
|
|
#define _GNU_SOURCE 1
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "hb.h"
|
|
#define HB_H_IN
|
|
#ifdef HAVE_OT
|
|
#include "hb-ot.h"
|
|
#define HB_OT_H_IN
|
|
#endif
|
|
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
|
|
#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
|
|
#include <intrin.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_malloc_impl) \
|
|
&& defined(hb_calloc_impl) \
|
|
&& defined(hb_realloc_impl) \
|
|
&& defined(hb_free_impl)
|
|
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 malloc hb_malloc_impl
|
|
#define calloc hb_calloc_impl
|
|
#define realloc hb_realloc_impl
|
|
#define free hb_free_impl
|
|
|
|
#if defined(hb_memalign_impl)
|
|
extern "C" int hb_memalign_impl(void **memptr, size_t alignment, size_t size);
|
|
#define posix_memalign hb_memalign_impl
|
|
#else
|
|
#undef HAVE_POSIX_MEMALIGN
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Compiler attributes
|
|
*/
|
|
|
|
#if __cplusplus < 201103L
|
|
|
|
#ifndef nullptr
|
|
#define nullptr NULL
|
|
#endif
|
|
|
|
#ifndef constexpr
|
|
#define constexpr const
|
|
#endif
|
|
|
|
#ifndef static_assert
|
|
#define static_assert(e, msg) \
|
|
HB_UNUSED typedef int HB_PASTE(static_assertion_failed_at_line_, __LINE__) [(e) ? 1 : -1]
|
|
#endif // static_assert
|
|
|
|
#ifdef __GNUC__
|
|
#if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8))
|
|
#define thread_local __thread
|
|
#endif
|
|
#else
|
|
#define thread_local
|
|
#endif
|
|
|
|
template <typename T>
|
|
struct _hb_alignof
|
|
{
|
|
struct s
|
|
{
|
|
char c;
|
|
T t;
|
|
};
|
|
static constexpr size_t value = offsetof (s, t);
|
|
};
|
|
#ifndef alignof
|
|
#define alignof(x) (_hb_alignof<x>::value)
|
|
#endif
|
|
|
|
/* https://github.com/harfbuzz/harfbuzz/issues/1127 */
|
|
#ifndef explicit_operator
|
|
#define explicit_operator
|
|
#endif
|
|
|
|
#else /* __cplusplus >= 201103L */
|
|
|
|
/* https://github.com/harfbuzz/harfbuzz/issues/1127 */
|
|
#ifndef explicit_operator
|
|
#define explicit_operator explicit
|
|
#endif
|
|
|
|
#endif /* __cplusplus < 201103L */
|
|
|
|
|
|
#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 __GNUC__ >= 3
|
|
#define HB_PURE_FUNC __attribute__((pure))
|
|
#define HB_CONST_FUNC __attribute__((const))
|
|
#define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
|
|
#else
|
|
#define HB_PURE_FUNC
|
|
#define HB_CONST_FUNC
|
|
#define HB_PRINTF_FUNC(format_idx, arg_idx)
|
|
#endif
|
|
#if __GNUC__ >= 4
|
|
#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
|
|
* attribute. */
|
|
# define HB_INTERNAL
|
|
#else
|
|
# define HB_INTERNAL
|
|
# define HB_NO_VISIBILITY 1
|
|
# endif
|
|
#endif
|
|
|
|
#if __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 __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
|
|
|
|
#if defined(_WIN32) || defined(__CYGWIN__)
|
|
/* 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
|
|
# define _WIN32_WINNT 0x0600
|
|
# 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
|
|
# define getenv(Name) nullptr
|
|
# if _WIN32_WCE < 0x800
|
|
# define setlocale(Category, Locale) "C"
|
|
static int errno = 0; /* Use something better? */
|
|
# endif
|
|
# elif defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP)
|
|
# define getenv(Name) nullptr
|
|
# endif
|
|
# if defined(_MSC_VER) && _MSC_VER < 1900
|
|
# define snprintf _snprintf
|
|
# endif
|
|
#endif
|
|
|
|
#if HAVE_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
|
|
#ifdef HB_NO_ATEXIT
|
|
# undef HB_USE_ATEXIT
|
|
#endif
|
|
|
|
#define HB_STMT_START do
|
|
#define HB_STMT_END while (0)
|
|
|
|
/* Static-assert as expression. */
|
|
template <unsigned int cond> class hb_assert_constant_t;
|
|
template <> class hb_assert_constant_t<1> {};
|
|
#define ASSERT_STATIC_EXPR_ZERO(_cond) (0 * (unsigned int) sizeof (hb_assert_constant_t<_cond>))
|
|
|
|
/* Lets assert int types. Saves trouble down the road. */
|
|
static_assert ((sizeof (int8_t) == 1), "");
|
|
static_assert ((sizeof (uint8_t) == 1), "");
|
|
static_assert ((sizeof (int16_t) == 2), "");
|
|
static_assert ((sizeof (uint16_t) == 2), "");
|
|
static_assert ((sizeof (int32_t) == 4), "");
|
|
static_assert ((sizeof (uint32_t) == 4), "");
|
|
static_assert ((sizeof (int64_t) == 8), "");
|
|
static_assert ((sizeof (uint64_t) == 8), "");
|
|
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), "");
|
|
|
|
|
|
/* We like our types POD */
|
|
|
|
#define _ASSERT_TYPE_POD1(_line, _type) union _type_##_type##_on_line_##_line##_is_not_POD { _type instance; }
|
|
#define _ASSERT_TYPE_POD0(_line, _type) _ASSERT_TYPE_POD1 (_line, _type)
|
|
#define ASSERT_TYPE_POD(_type) _ASSERT_TYPE_POD0 (__LINE__, _type)
|
|
|
|
#ifdef __GNUC__
|
|
# define _ASSERT_INSTANCE_POD1(_line, _instance) \
|
|
HB_STMT_START { \
|
|
typedef __typeof__(_instance) _type_##_line; \
|
|
_ASSERT_TYPE_POD1 (_line, _type_##_line); \
|
|
} HB_STMT_END
|
|
#else
|
|
# define _ASSERT_INSTANCE_POD1(_line, _instance) typedef int _assertion_on_line_##_line##_not_tested
|
|
#endif
|
|
# define _ASSERT_INSTANCE_POD0(_line, _instance) _ASSERT_INSTANCE_POD1 (_line, _instance)
|
|
# define ASSERT_INSTANCE_POD(_instance) _ASSERT_INSTANCE_POD0 (__LINE__, _instance)
|
|
|
|
/* Check _assertion in a method environment */
|
|
#define _ASSERT_POD1(_line) \
|
|
HB_UNUSED inline void _static_assertion_on_line_##_line (void) const \
|
|
{ _ASSERT_INSTANCE_POD1 (_line, *this); /* Make sure it's POD. */ }
|
|
# define _ASSERT_POD0(_line) _ASSERT_POD1 (_line)
|
|
# define ASSERT_POD() _ASSERT_POD0 (__LINE__)
|
|
|
|
|
|
#define HB_DISALLOW_COPY_AND_ASSIGN(TypeName) \
|
|
TypeName(const TypeName&); \
|
|
void operator=(const TypeName&)
|
|
|
|
|
|
/*
|
|
* Compiler-assisted vectorization parameters.
|
|
*/
|
|
|
|
/*
|
|
* Disable vectorization for now. To correctly use them, we should
|
|
* use posix_memalign() to allocate in hb_vector_t. Otherwise, can
|
|
* cause misaligned access.
|
|
*
|
|
* https://bugs.chromium.org/p/chromium/issues/detail?id=860184
|
|
*/
|
|
#if !defined(HB_VECTOR_SIZE)
|
|
# define HB_VECTOR_SIZE 0
|
|
#endif
|
|
|
|
/* The `vector_size' attribute was introduced in gcc 3.1. */
|
|
#if !defined(HB_VECTOR_SIZE)
|
|
# if defined( __GNUC__ ) && ( __GNUC__ >= 4 )
|
|
# define HB_VECTOR_SIZE 128
|
|
# else
|
|
# define HB_VECTOR_SIZE 0
|
|
# endif
|
|
#endif
|
|
static_assert (0 == (HB_VECTOR_SIZE & (HB_VECTOR_SIZE - 1)), "HB_VECTOR_SIZE is not power of 2.");
|
|
static_assert (0 == (HB_VECTOR_SIZE % 64), "HB_VECTOR_SIZE is not multiple of 64.");
|
|
#if HB_VECTOR_SIZE
|
|
typedef uint64_t hb_vector_size_impl_t __attribute__((vector_size (HB_VECTOR_SIZE / 8)));
|
|
#else
|
|
typedef uint64_t hb_vector_size_impl_t;
|
|
#endif
|
|
|
|
|
|
/* HB_NDEBUG disables some sanity checks that are very safe to disable and
|
|
* should be disabled in production systems. If NDEBUG is defined, enable
|
|
* HB_NDEBUG; but if it's desirable that normal assert()s (which are very
|
|
* light-weight) to be enabled, then HB_DEBUG can be defined to disable
|
|
* the costlier checks. */
|
|
#ifdef NDEBUG
|
|
#define HB_NDEBUG 1
|
|
#endif
|
|
|
|
|
|
/* Flags */
|
|
|
|
/* Enable bitwise ops on enums marked as flags_t */
|
|
/* To my surprise, looks like the function resolver is happy to silently cast
|
|
* one enum to another... So this doesn't provide the type-checking that I
|
|
* originally had in mind... :(.
|
|
*
|
|
* For MSVC warnings, see: https://github.com/harfbuzz/harfbuzz/pull/163
|
|
*/
|
|
#ifdef _MSC_VER
|
|
# pragma warning(disable:4200)
|
|
# pragma warning(disable:4800)
|
|
#endif
|
|
#define HB_MARK_AS_FLAG_T(T) \
|
|
extern "C++" { \
|
|
static inline T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
|
|
static inline T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
|
|
static inline T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
|
|
static inline T operator ~ (T r) { return T (~(unsigned int) r); } \
|
|
static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
|
|
static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
|
|
static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
|
|
}
|
|
|
|
/* Useful for set-operations on small enums.
|
|
* For example, for testing "x ∈ {x1, x2, x3}" use:
|
|
* (FLAG_UNSAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
|
|
*/
|
|
#define FLAG(x) (ASSERT_STATIC_EXPR_ZERO ((unsigned int)(x) < 32) + (1U << (unsigned int)(x)))
|
|
#define FLAG_UNSAFE(x) ((unsigned int)(x) < 32 ? (1U << (unsigned int)(x)) : 0)
|
|
#define FLAG_RANGE(x,y) (ASSERT_STATIC_EXPR_ZERO ((x) < (y)) + FLAG(y+1) - FLAG(x))
|
|
|
|
|
|
/* Size signifying variable-sized array */
|
|
#define VAR 1
|
|
|
|
|
|
/* fallback for round() */
|
|
static inline double
|
|
_hb_round (double x)
|
|
{
|
|
if (x >= 0)
|
|
return floor (x + 0.5);
|
|
else
|
|
return ceil (x - 0.5);
|
|
}
|
|
#if !defined (HAVE_ROUND) && !defined (HAVE_DECL_ROUND)
|
|
#define round(x) _hb_round(x)
|
|
#endif
|
|
|
|
|
|
/* fallback for posix_memalign() */
|
|
static inline int
|
|
_hb_memalign(void **memptr, size_t alignment, size_t size)
|
|
{
|
|
if (unlikely (0 != (alignment & (alignment - 1)) ||
|
|
!alignment ||
|
|
0 != (alignment & (sizeof (void *) - 1))))
|
|
return EINVAL;
|
|
|
|
char *p = (char *) malloc (size + alignment - 1);
|
|
if (unlikely (!p))
|
|
return ENOMEM;
|
|
|
|
size_t off = (size_t) p & (alignment - 1);
|
|
if (off)
|
|
p += alignment - off;
|
|
|
|
*memptr = (void *) p;
|
|
|
|
return 0;
|
|
}
|
|
#if !defined(posix_memalign) && !defined(HAVE_POSIX_MEMALIGN)
|
|
#define posix_memalign _hb_memalign
|
|
#endif
|
|
|
|
|
|
/* Headers we include for everyone. Keep sorted. They express dependency amongst
|
|
* themselves, but no other file should include them.*/
|
|
#include "hb-atomic.hh"
|
|
#include "hb-debug.hh"
|
|
#include "hb-dsalgs.hh"
|
|
#include "hb-mutex.hh"
|
|
#include "hb-null.hh"
|
|
#include "hb-object.hh"
|
|
|
|
#endif /* HB_HH */
|