/* * 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_PRIVATE_HH #define HB_PRIVATE_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 #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 #endif /* Compiler attributes */ #if __cplusplus < 201103L #ifndef nullptr #define nullptr NULL #endif // Static assertions #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 #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"))) # 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 # 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 /* Basics */ #undef MIN template static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; } #undef MAX template static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; } static inline unsigned int DIV_CEIL (const unsigned int a, unsigned int b) { return (a + (b - 1)) / b; } #undef ARRAY_LENGTH template static inline unsigned int ARRAY_LENGTH (const Type (&)[n]) { return n; } /* A const version, but does not detect erratically being called on pointers. */ #define ARRAY_LENGTH_CONST(__array) ((signed int) (sizeof (__array) / sizeof (__array[0]))) #define HB_STMT_START do #define HB_STMT_END while (0) 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), ""); /* 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__) /* Tiny functions */ /* * Void! */ typedef const struct _hb_void_t *hb_void_t; #define HB_VOID ((const _hb_void_t *) nullptr) /* Return the number of 1 bits in v. */ template static inline HB_CONST_FUNC unsigned int _hb_popcount (T v) { #if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) && defined(__OPTIMIZE__) if (sizeof (T) <= sizeof (unsigned int)) return __builtin_popcount (v); if (sizeof (T) <= sizeof (unsigned long)) return __builtin_popcountl (v); if (sizeof (T) <= sizeof (unsigned long long)) return __builtin_popcountll (v); #endif if (sizeof (T) <= 4) { /* "HACKMEM 169" */ uint32_t y; y = (v >> 1) &033333333333; y = v - y - ((y >>1) & 033333333333); return (((y + (y >> 3)) & 030707070707) % 077); } if (sizeof (T) == 8) { unsigned int shift = 32; return _hb_popcount ((uint32_t) v) + _hb_popcount ((uint32_t) (v >> shift)); } if (sizeof (T) == 16) { unsigned int shift = 64; return _hb_popcount ((uint64_t) v) + _hb_popcount ((uint64_t) (v >> shift)); } assert (0); return 0; /* Shut up stupid compiler. */ } /* Returns the number of bits needed to store number */ template static inline HB_CONST_FUNC unsigned int _hb_bit_storage (T v) { if (unlikely (!v)) return 0; #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__) if (sizeof (T) <= sizeof (unsigned int)) return sizeof (unsigned int) * 8 - __builtin_clz (v); if (sizeof (T) <= sizeof (unsigned long)) return sizeof (unsigned long) * 8 - __builtin_clzl (v); if (sizeof (T) <= sizeof (unsigned long long)) return sizeof (unsigned long long) * 8 - __builtin_clzll (v); #endif #if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__) if (sizeof (T) <= sizeof (unsigned int)) { unsigned long where; _BitScanReverse (&where, v); return 1 + where; } # if _WIN64 if (sizeof (T) <= 8) { unsigned long where; _BitScanReverse64 (&where, v); return 1 + where; } # endif #endif if (sizeof (T) <= 4) { /* "bithacks" */ const unsigned int b[] = {0x2, 0xC, 0xF0, 0xFF00, 0xFFFF0000}; const unsigned int S[] = {1, 2, 4, 8, 16}; unsigned int r = 0; for (int i = 4; i >= 0; i--) if (v & b[i]) { v >>= S[i]; r |= S[i]; } return r + 1; } if (sizeof (T) <= 8) { /* "bithacks" */ const uint64_t b[] = {0x2ULL, 0xCULL, 0xF0ULL, 0xFF00ULL, 0xFFFF0000ULL, 0xFFFFFFFF00000000ULL}; const unsigned int S[] = {1, 2, 4, 8, 16, 32}; unsigned int r = 0; for (int i = 5; i >= 0; i--) if (v & b[i]) { v >>= S[i]; r |= S[i]; } return r + 1; } if (sizeof (T) == 16) { unsigned int shift = 64; return (v >> shift) ? _hb_bit_storage ((uint64_t) (v >> shift)) + shift : _hb_bit_storage ((uint64_t) v); } assert (0); return 0; /* Shut up stupid compiler. */ } /* Returns the number of zero bits in the least significant side of v */ template static inline HB_CONST_FUNC unsigned int _hb_ctz (T v) { if (unlikely (!v)) return 0; #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__) if (sizeof (T) <= sizeof (unsigned int)) return __builtin_ctz (v); if (sizeof (T) <= sizeof (unsigned long)) return __builtin_ctzl (v); if (sizeof (T) <= sizeof (unsigned long long)) return __builtin_ctzll (v); #endif #if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__) if (sizeof (T) <= sizeof (unsigned int)) { unsigned long where; _BitScanForward (&where, v); return where; } # if _WIN64 if (sizeof (T) <= 8) { unsigned long where; _BitScanForward64 (&where, v); return where; } # endif #endif if (sizeof (T) <= 4) { /* "bithacks" */ unsigned int c = 32; v &= - (int32_t) v; if (v) c--; if (v & 0x0000FFFF) c -= 16; if (v & 0x00FF00FF) c -= 8; if (v & 0x0F0F0F0F) c -= 4; if (v & 0x33333333) c -= 2; if (v & 0x55555555) c -= 1; return c; } if (sizeof (T) <= 8) { /* "bithacks" */ unsigned int c = 64; v &= - (int64_t) (v); if (v) c--; if (v & 0x00000000FFFFFFFFULL) c -= 32; if (v & 0x0000FFFF0000FFFFULL) c -= 16; if (v & 0x00FF00FF00FF00FFULL) c -= 8; if (v & 0x0F0F0F0F0F0F0F0FULL) c -= 4; if (v & 0x3333333333333333ULL) c -= 2; if (v & 0x5555555555555555ULL) c -= 1; return c; } if (sizeof (T) == 16) { unsigned int shift = 64; return (uint64_t) v ? _hb_bit_storage ((uint64_t) v) : _hb_bit_storage ((uint64_t) v >> shift) + shift; } assert (0); return 0; /* Shut up stupid compiler. */ } static inline bool _hb_unsigned_int_mul_overflows (unsigned int count, unsigned int size) { return (size > 0) && (count >= ((unsigned int) -1) / size); } static inline unsigned int _hb_ceil_to_4 (unsigned int v) { return ((v - 1) | 3) + 1; } /* * * Utility types * */ #define HB_DISALLOW_COPY_AND_ASSIGN(TypeName) \ TypeName(const TypeName&); \ void operator=(const TypeName&) /* * Static pools */ /* Global nul-content Null pool. Enlarge as necessary. */ #define HB_NULL_POOL_SIZE 264 static_assert (HB_NULL_POOL_SIZE % sizeof (void *) == 0, "Align HB_NULL_POOL_SIZE."); #ifdef HB_NO_VISIBILITY static #else extern HB_INTERNAL #endif void * const _hb_NullPool[HB_NULL_POOL_SIZE / sizeof (void *)] #ifdef HB_NO_VISIBILITY = {} #endif ; /* Generic nul-content Null objects. */ template static inline Type const & Null (void) { static_assert (sizeof (Type) <= HB_NULL_POOL_SIZE, "Increase HB_NULL_POOL_SIZE."); return *reinterpret_cast (_hb_NullPool); } #define Null(Type) Null() /* Specializaiton for arbitrary-content arbitrary-sized Null objects. */ #define DEFINE_NULL_DATA(Namespace, Type, data) \ } /* Close namespace. */ \ static const char _Null##Type[sizeof (Namespace::Type) + 1] = data; /* +1 is for nul-termination in data */ \ template <> \ /*static*/ inline const Namespace::Type& Null (void) { \ return *reinterpret_cast (_Null##Type); \ } \ namespace Namespace { \ /* The following line really exists such that we end in a place needing semicolon */ \ static_assert (Namespace::Type::min_size + 1 <= sizeof (_Null##Type), "Null pool too small. Enlarge.") /* Global writable pool. Enlarge as necessary. */ /* To be fully correct, CrapPool must be thread_local. However, we do not rely on CrapPool * for correct operation. It only exist to catch and divert program logic bugs instead of * causing bad memory access. So, races there are not actually introducing incorrectness * in the code. Has ~12kb binary size overhead to have it, also clang build fails with it. */ #ifdef HB_NO_VISIBILITY static #else extern HB_INTERNAL #endif /*thread_local*/ void * _hb_CrapPool[HB_NULL_POOL_SIZE / sizeof (void *)] #ifdef HB_NO_VISIBILITY = {} #endif ; /* CRAP pool: Common Region for Access Protection. */ template static inline Type& Crap (void) { static_assert (sizeof (Type) <= HB_NULL_POOL_SIZE, "Increase HB_NULL_POOL_SIZE."); Type *obj = reinterpret_cast (_hb_CrapPool); *obj = Null(Type); return *obj; } #define Crap(Type) Crap() template struct CrapOrNull { static inline Type & get (void) { return Crap(Type); } }; template struct CrapOrNull { static inline Type const & get (void) { return Null(Type); } }; #define CrapOrNull(Type) CrapOrNull::get () /* arrays and maps */ #define HB_PREALLOCED_ARRAY_INIT {0, 0, nullptr} template struct hb_vector_t { unsigned int len; unsigned int allocated; bool successful; Type *arrayZ; Type static_array[StaticSize]; void init (void) { len = 0; allocated = ARRAY_LENGTH (static_array); successful = true; arrayZ = static_array; } inline Type& operator [] (unsigned int i) { if (unlikely (i >= len)) return Crap (Type); return arrayZ[i]; } inline const Type& operator [] (unsigned int i) const { if (unlikely (i >= len)) return Null(Type); return arrayZ[i]; } inline Type *push (void) { if (unlikely (!resize (len + 1))) return &Crap(Type); return &arrayZ[len - 1]; } inline Type *push (const Type& v) { Type *p = push (); *p = v; return p; } /* Allocate for size but don't adjust len. */ inline bool alloc (unsigned int size) { if (unlikely (!successful)) return false; if (likely (size <= allocated)) return true; /* Reallocate */ unsigned int new_allocated = allocated; while (size >= new_allocated) new_allocated += (new_allocated >> 1) + 8; Type *new_array = nullptr; if (arrayZ == static_array) { new_array = (Type *) calloc (new_allocated, sizeof (Type)); if (new_array) memcpy (new_array, arrayZ, len * sizeof (Type)); } else { bool overflows = (new_allocated < allocated) || _hb_unsigned_int_mul_overflows (new_allocated, sizeof (Type)); if (likely (!overflows)) new_array = (Type *) realloc (arrayZ, new_allocated * sizeof (Type)); } if (unlikely (!new_array)) { successful = false; return false; } arrayZ = new_array; allocated = new_allocated; return true; } inline bool resize (int size_) { unsigned int size = size_ < 0 ? 0u : (unsigned int) size_; if (!alloc (size)) return false; if (size > len) memset (arrayZ + len, 0, (size - len) * sizeof (*arrayZ)); len = size; return true; } inline void pop (void) { if (!len) return; len--; } inline void remove (unsigned int i) { if (unlikely (i >= len)) return; memmove (static_cast (&arrayZ[i]), static_cast (&arrayZ[i + 1]), (len - i - 1) * sizeof (Type)); len--; } inline void shrink (int size_) { unsigned int size = size_ < 0 ? 0u : (unsigned int) size_; if (size < len) len = size; } template inline Type *find (T v) { for (unsigned int i = 0; i < len; i++) if (arrayZ[i] == v) return &arrayZ[i]; return nullptr; } template inline const Type *find (T v) const { for (unsigned int i = 0; i < len; i++) if (arrayZ[i] == v) return &arrayZ[i]; return nullptr; } inline void qsort (int (*cmp)(const void*, const void*)) { ::qsort (arrayZ, len, sizeof (Type), cmp); } inline void qsort (void) { ::qsort (arrayZ, len, sizeof (Type), Type::cmp); } inline void qsort (unsigned int start, unsigned int end) { ::qsort (arrayZ + start, end - start, sizeof (Type), Type::cmp); } template inline Type *lsearch (const T &x) { for (unsigned int i = 0; i < len; i++) if (0 == this->arrayZ[i].cmp (&x)) return &arrayZ[i]; return nullptr; } template inline Type *bsearch (const T &x) { unsigned int i; return bfind (x, &i) ? &arrayZ[i] : nullptr; } template inline const Type *bsearch (const T &x) const { unsigned int i; return bfind (x, &i) ? &arrayZ[i] : nullptr; } template inline bool bfind (const T &x, unsigned int *i) const { int min = 0, max = (int) this->len - 1; while (min <= max) { int mid = (min + max) / 2; int c = this->arrayZ[mid].cmp (&x); if (c < 0) max = mid - 1; else if (c > 0) min = mid + 1; else { *i = mid; return true; } } if (max < 0 || (max < (int) this->len && this->arrayZ[max].cmp (&x) > 0)) max++; *i = max; return false; } inline void fini (void) { if (arrayZ != static_array) free (arrayZ); arrayZ = nullptr; allocated = len = 0; } }; template struct hb_auto_t : Type { hb_auto_t (void) { Type::init (); } ~hb_auto_t (void) { Type::fini (); } private: /* Hide */ void init (void) {} void fini (void) {} }; template struct hb_auto_array_t : hb_auto_t > {}; #define HB_LOCKABLE_SET_INIT {HB_PREALLOCED_ARRAY_INIT} template struct hb_lockable_set_t { hb_vector_t items; inline void init (void) { items.init (); } template inline item_t *replace_or_insert (T v, lock_t &l, bool replace) { l.lock (); item_t *item = items.find (v); if (item) { if (replace) { item_t old = *item; *item = v; l.unlock (); old.fini (); } else { item = nullptr; l.unlock (); } } else { item = items.push (v); l.unlock (); } return item; } template inline void remove (T v, lock_t &l) { l.lock (); item_t *item = items.find (v); if (item) { item_t old = *item; *item = items[items.len - 1]; items.pop (); l.unlock (); old.fini (); } else { l.unlock (); } } template inline bool find (T v, item_t *i, lock_t &l) { l.lock (); item_t *item = items.find (v); if (item) *i = *item; l.unlock (); return !!item; } template inline item_t *find_or_insert (T v, lock_t &l) { l.lock (); item_t *item = items.find (v); if (!item) { item = items.push (v); } l.unlock (); return item; } inline void fini (lock_t &l) { if (!items.len) { /* No need for locking. */ items.fini (); return; } l.lock (); while (items.len) { item_t old = items[items.len - 1]; items.pop (); l.unlock (); old.fini (); l.lock (); } items.fini (); l.unlock (); } }; /* ASCII tag/character handling */ static inline bool ISALPHA (unsigned char c) { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); } static inline bool ISALNUM (unsigned char c) { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'); } static inline bool ISSPACE (unsigned char c) { return c == ' ' || c =='\f'|| c =='\n'|| c =='\r'|| c =='\t'|| c =='\v'; } static inline unsigned char TOUPPER (unsigned char c) { return (c >= 'a' && c <= 'z') ? c - 'a' + 'A' : c; } static inline unsigned char TOLOWER (unsigned char c) { return (c >= 'A' && c <= 'Z') ? c - 'A' + 'a' : c; } /* 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 /* Misc */ template class hb_assert_unsigned_t; template <> class hb_assert_unsigned_t {}; template <> class hb_assert_unsigned_t {}; template <> class hb_assert_unsigned_t {}; template <> class hb_assert_unsigned_t {}; template static inline bool hb_in_range (T u, T lo, T hi) { /* The sizeof() is here to force template instantiation. * I'm sure there are better ways to do this but can't think of * one right now. Declaring a variable won't work as HB_UNUSED * is unusable on some platforms and unused types are less likely * to generate a warning than unused variables. */ static_assert ((sizeof (hb_assert_unsigned_t) >= 0), ""); /* The casts below are important as if T is smaller than int, * the subtract results will become a signed int! */ return (T)(u - lo) <= (T)(hi - lo); } template static inline bool hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2) { return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2); } template static inline bool hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2, T lo3, T hi3) { return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2) || hb_in_range (u, lo3, hi3); } /* 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)) template static inline void hb_stable_sort (T *array, unsigned int len, int(*compar)(const T *, const T *), T2 *array2) { for (unsigned int i = 1; i < len; i++) { unsigned int j = i; while (j && compar (&array[j - 1], &array[i]) > 0) j--; if (i == j) continue; /* Move item i to occupy place for item j, shift what's in between. */ { T t = array[i]; memmove (&array[j + 1], &array[j], (i - j) * sizeof (T)); array[j] = t; } if (array2) { T2 t = array2[i]; memmove (&array2[j + 1], &array2[j], (i - j) * sizeof (T2)); array2[j] = t; } } } template static inline void hb_stable_sort (T *array, unsigned int len, int(*compar)(const T *, const T *)) { hb_stable_sort (array, len, compar, (int *) nullptr); } static inline hb_bool_t hb_codepoint_parse (const char *s, unsigned int len, int base, hb_codepoint_t *out) { /* Pain because we don't know whether s is nul-terminated. */ char buf[64]; len = MIN (ARRAY_LENGTH (buf) - 1, len); strncpy (buf, s, len); buf[len] = '\0'; char *end; errno = 0; unsigned long v = strtoul (buf, &end, base); if (errno) return false; if (*end) return false; *out = v; return true; } /* Vectorization */ struct HbOpOr { static const bool passthru_left = true; static const bool passthru_right = true; template static void process (T &o, const T &a, const T &b) { o = a | b; } }; struct HbOpAnd { static const bool passthru_left = false; static const bool passthru_right = false; template static void process (T &o, const T &a, const T &b) { o = a & b; } }; struct HbOpMinus { static const bool passthru_left = true; static const bool passthru_right = false; template static void process (T &o, const T &a, const T &b) { o = a & ~b; } }; struct HbOpXor { static const bool passthru_left = true; static const bool passthru_right = true; template static void process (T &o, const T &a, const T &b) { o = a ^ b; } }; /* Compiler-assisted vectorization. */ /* The `vector_size' attribute was introduced in gcc 3.1. */ #if defined( __GNUC__ ) && ( __GNUC__ >= 4 ) #define HB_VECTOR_SIZE 128 #elif !defined(HB_VECTOR_SIZE) #define HB_VECTOR_SIZE 0 #endif /* Type behaving similar to vectorized vars defined using __attribute__((vector_size(...))). */ template struct hb_vector_size_t { elt_t& operator [] (unsigned int i) { return u.v[i]; } const elt_t& operator [] (unsigned int i) const { return u.v[i]; } template inline hb_vector_size_t process (const hb_vector_size_t &o) const { hb_vector_size_t r; #if HB_VECTOR_SIZE if (HB_VECTOR_SIZE && 0 == (byte_size * 8) % HB_VECTOR_SIZE) for (unsigned int i = 0; i < ARRAY_LENGTH (u.vec); i++) Op::process (r.u.vec[i], u.vec[i], o.u.vec[i]); else #endif for (unsigned int i = 0; i < ARRAY_LENGTH (u.v); i++) Op::process (r.u.v[i], u.v[i], o.u.v[i]); return r; } inline hb_vector_size_t operator | (const hb_vector_size_t &o) const { return process (o); } inline hb_vector_size_t operator & (const hb_vector_size_t &o) const { return process (o); } inline hb_vector_size_t operator ^ (const hb_vector_size_t &o) const { return process (o); } inline hb_vector_size_t operator ~ () const { hb_vector_size_t r; #if HB_VECTOR_SIZE && 0 if (HB_VECTOR_SIZE && 0 == (byte_size * 8) % HB_VECTOR_SIZE) for (unsigned int i = 0; i < ARRAY_LENGTH (u.vec); i++) r.u.vec[i] = ~u.vec[i]; else #endif for (unsigned int i = 0; i < ARRAY_LENGTH (u.v); i++) r.u.v[i] = ~u.v[i]; return r; } private: static_assert (byte_size / sizeof (elt_t) * sizeof (elt_t) == byte_size, ""); union { elt_t v[byte_size / sizeof (elt_t)]; #if HB_VECTOR_SIZE typedef unsigned long vec_t __attribute__((vector_size (HB_VECTOR_SIZE / 8))); vec_t vec[byte_size / sizeof (vec_t)]; #endif } u; }; /* Global runtime options. */ struct hb_options_t { unsigned int initialized : 1; unsigned int uniscribe_bug_compatible : 1; }; union hb_options_union_t { unsigned int i; hb_options_t opts; }; static_assert ((sizeof (int) == sizeof (hb_options_union_t)), ""); HB_INTERNAL void _hb_options_init (void); extern HB_INTERNAL hb_options_union_t _hb_options; static inline hb_options_t hb_options (void) { if (unlikely (!_hb_options.i)) _hb_options_init (); return _hb_options.opts; } /* Size signifying variable-sized array */ #define VAR 1 /* String type. */ struct hb_bytes_t { inline hb_bytes_t (void) : bytes (nullptr), len (0) {} inline hb_bytes_t (const char *bytes_, unsigned int len_) : bytes (bytes_), len (len_) {} inline int cmp (const hb_bytes_t &a) const { if (len != a.len) return (int) a.len - (int) len; return memcmp (a.bytes, bytes, len); } static inline int cmp (const void *pa, const void *pb) { hb_bytes_t *a = (hb_bytes_t *) pa; hb_bytes_t *b = (hb_bytes_t *) pb; return b->cmp (*a); } const char *bytes; unsigned int len; }; /* fallback for round() */ #if !defined (HAVE_ROUND) && !defined (HAVE_DECL_ROUND) static inline double _hb_round (double x) { if (x >= 0) return floor (x + 0.5); else return ceil (x - 0.5); } #define round(x) _hb_round(x) #endif #endif /* HB_PRIVATE_HH */