/* * 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_DIAGNOSTIC_PRAGMAS #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. */ #pragma GCC diagnostic warning "-Wall" #pragma GCC diagnostic warning "-Wextra" #pragma GCC diagnostic ignored "-Wpragmas" #pragma GCC diagnostic ignored "-Wunknown-pragmas" #pragma GCC diagnostic ignored "-Wunknown-warning-option" //#pragma GCC diagnostic warning "-Weverything" /* Error. Should never happen. */ #pragma GCC diagnostic error "-Wc++11-narrowing" #pragma GCC diagnostic error "-Wcast-align" #pragma GCC diagnostic error "-Wdelete-non-virtual-dtor" #pragma GCC diagnostic error "-Wformat-security" #pragma GCC diagnostic error "-Wimplicit-function-declaration" #pragma GCC diagnostic error "-Winit-self" #pragma GCC diagnostic error "-Wmissing-braces" #pragma GCC diagnostic error "-Wmissing-declarations" #pragma GCC diagnostic error "-Wmissing-prototypes" #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" /* Warning. To be investigated if happens. */ #pragma GCC diagnostic warning "-Wbuiltin-macro-redefined" #pragma GCC diagnostic warning "-Wdisabled-optimization" #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" /* Ignored currently, but should be fixed at some point. */ #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 /* Ignored intentionally. */ #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 "-Wstrict-aliasing" #pragma GCC diagnostic ignored "-Wtype-limits" #endif #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif /* * 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 "hb-aat.h" #include #include #include #include #include #include #include #include #if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__) #include #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 #if defined(__GNUC__) #if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)) #define thread_local __thread #endif #else #define thread_local #endif template struct _hb_alignof { struct s { char c; T t; }; static constexpr size_t value = offsetof (s, t); }; #ifndef alignof #define alignof(x) (_hb_alignof::value) #endif /* https://github.com/harfbuzz/harfbuzz/issues/1127 */ #ifndef explicit_operator #define explicit_operator operator #endif #else /* __cplusplus >= 201103L */ /* https://github.com/harfbuzz/harfbuzz/issues/1127 */ #ifndef explicit_operator #define explicit_operator explicit operator #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 defined(__GNUC__) && (__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 defined(__GNUC__) && (__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 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 #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 # define HB_FALLTHROUGH __fallthrough #else # define HB_FALLTHROUGH /* FALLTHROUGH */ #endif #if defined(__clang__) /* 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 !defined(WINAPI_FAMILY) || !(WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) # 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 # 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 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 #ifdef HB_NO_ATEXIT # undef HB_USE_ATEXIT #endif #ifndef HB_USE_ATEXIT # define HB_USE_ATEXIT 0 #endif #define HB_STMT_START do #define HB_STMT_END while (0) /* Static-assert as expression. */ template 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), ""); #if __cplusplus >= 201103L /* We only enable these with C++11 or later, since earlier language * does not allow structs with constructors in unions, and we need * those. */ #define HB_NO_COPY_ASSIGN(TypeName) \ TypeName(const TypeName&); \ void operator=(const TypeName&) #define HB_NO_COPY_ASSIGN_TEMPLATE(TypeName, T) \ TypeName(const TypeName&); \ void operator=(const TypeName&) #define HB_NO_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) \ TypeName(const TypeName&); \ void operator=(const TypeName&) #define HB_NO_CREATE_COPY_ASSIGN(TypeName) \ TypeName(); \ TypeName(const TypeName&); \ void operator=(const TypeName&) #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE(TypeName, T) \ TypeName(); \ TypeName(const TypeName&); \ void operator=(const TypeName&) #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) \ TypeName(); \ TypeName(const TypeName&); \ void operator=(const TypeName&) #else /* __cpluspplus >= 201103L */ #define HB_NO_COPY_ASSIGN(TypeName) static_assert (true, "") #define HB_NO_COPY_ASSIGN_TEMPLATE(TypeName, T) static_assert (true, "") #define HB_NO_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) static_assert (true, "") #define HB_NO_CREATE_COPY_ASSIGN(TypeName) static_assert (true, "") #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE(TypeName, T) static_assert (true, "") #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) static_assert (true, "") #endif /* __cpluspplus >= 201103L */ /* * 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; } \ } \ static_assert (true, "") /* 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)(x) < 32) + (((uint32_t) 1U) << (unsigned)(x))) #define FLAG_UNSAFE(x) ((unsigned)(x) < 32 ? (((uint32_t) 1U) << (unsigned)(x)) : 0) #define FLAG_RANGE(x,y) (ASSERT_STATIC_EXPR_ZERO ((x) < (y)) + FLAG(y+1) - FLAG(x)) #define FLAG64(x) (ASSERT_STATIC_EXPR_ZERO ((unsigned)(x) < 64) + (((uint64_t) 1ULL) << (unsigned)(x))) #define FLAG64_UNSAFE(x) ((unsigned)(x) < 64 ? (((uint64_t) 1ULL) << (unsigned)(x)) : 0) /* 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 /* * For lack of a better place, put Zawgyi script hack here. * https://github.com/harfbuzz/harfbuzz/issues/1162 */ #define HB_SCRIPT_MYANMAR_ZAWGYI ((hb_script_t) HB_TAG ('Q','a','a','g')) /* Some really basic things everyone wants. */ template struct hb_remove_const { typedef T value; }; template struct hb_remove_const { typedef T value; }; #define hb_remove_const(T) hb_remove_const::value template struct hb_remove_reference { typedef T value; }; template struct hb_remove_reference { typedef T value; }; #define hb_remove_reference(T) hb_remove_reference::value template struct hb_remove_pointer { typedef T value; }; template struct hb_remove_pointer { typedef T value; }; #define hb_remove_pointer(T) hb_remove_pointer::value /* 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-atomic.hh" #include "hb-mutex.hh" #include "hb-null.hh" #include "hb-dsalgs.hh" // Requires: hb-null #include "hb-iter.hh" // Requires: hb-null #include "hb-debug.hh" // Requires: hb-atomic hb-dsalgs #include "hb-array.hh" // Requires: hb-dsalgs 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 */