2 * Copyright © 2007,2008,2009 Red Hat, Inc.
3 * Copyright © 2011,2012 Google, Inc.
5 * This is part of HarfBuzz, a text shaping library.
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
48 /* We only use these two for debug output. However, the debug code is
49 * always seen by the compiler (and optimized out in non-debug builds.
50 * If including these becomes a problem, we can start thinking about
51 * someway around that. */
57 /* Compile-time custom allocator support. */
59 #if defined(hb_malloc_impl) \
60 && defined(hb_calloc_impl) \
61 && defined(hb_realloc_impl) \
62 && defined(hb_free_impl)
63 extern "C" void* hb_malloc_impl(size_t size);
64 extern "C" void* hb_calloc_impl(size_t nmemb, size_t size);
65 extern "C" void* hb_realloc_impl(void *ptr, size_t size);
66 extern "C" void hb_free_impl(void *ptr);
67 #define malloc hb_malloc_impl
68 #define calloc hb_calloc_impl
69 #define realloc hb_realloc_impl
70 #define free hb_free_impl
74 /* Compiler attributes */
77 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
78 #define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
79 #define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
80 #define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0))
82 #define likely(expr) (expr)
83 #define unlikely(expr) (expr)
88 #define __attribute__(x)
92 #define HB_PURE_FUNC __attribute__((pure))
93 #define HB_CONST_FUNC __attribute__((const))
94 #define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
98 #define HB_PRINTF_FUNC(format_idx, arg_idx)
101 #define HB_UNUSED __attribute__((unused))
107 # if !defined(__MINGW32__) && !defined(__CYGWIN__)
108 # define HB_INTERNAL __attribute__((__visibility__("hidden")))
115 #define HB_FUNC __PRETTY_FUNCTION__
116 #elif defined(_MSC_VER)
117 #define HB_FUNC __FUNCSIG__
119 #define HB_FUNC __func__
123 * Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
124 * HB_FALLTHROUGH is an annotation to suppress compiler warnings about switch
125 * cases that fall through without a break or return statement. HB_FALLTHROUGH
126 * is only needed on cases that have code:
129 * case 1: // These cases have no code. No fallthrough annotations are needed.
132 * foo = 4; // This case has code, so a fallthrough annotation is needed:
138 #if defined(__clang__) && __cplusplus >= 201103L
139 /* clang's fallthrough annotations are only available starting in C++11. */
140 # define HB_FALLTHROUGH [[clang::fallthrough]]
141 #elif defined(_MSC_VER)
143 * MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):
144 * https://msdn.microsoft.com/en-us/library/ms235402%28VS.80%29.aspx
147 # define HB_FALLTHROUGH __fallthrough
149 # define HB_FALLTHROUGH /* FALLTHROUGH */
152 #if defined(_WIN32) || defined(__CYGWIN__)
153 /* We need Windows Vista for both Uniscribe backend and for
154 * MemoryBarrier. We don't support compiling on Windows XP,
155 * though we run on it fine. */
156 # if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
159 # ifndef _WIN32_WINNT
160 # define _WIN32_WINNT 0x0600
162 # ifndef WIN32_LEAN_AND_MEAN
163 # define WIN32_LEAN_AND_MEAN 1
169 # if defined(_WIN32_WCE)
170 /* Some things not defined on Windows CE. */
171 # define strdup _strdup
172 # define vsnprintf _vsnprintf
173 # define getenv(Name) NULL
174 # if _WIN32_WCE < 0x800
175 # define setlocale(Category, Locale) "C"
176 static int errno = 0; /* Use something better? */
178 # elif defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP)
179 # define getenv(Name) NULL
181 # if defined(_MSC_VER) && _MSC_VER < 1900
182 # define snprintf _snprintf
183 # elif defined(_MSC_VER) && _MSC_VER >= 1900
184 # /* Covers VC++ Error for strdup being a deprecated POSIX name and to instead use _strdup instead */
185 # define strdup _strdup
190 /* atexit() is only safe to be called from shared libraries on certain
191 * platforms. Whitelist.
192 * https://bugs.freedesktop.org/show_bug.cgi?id=82246 */
193 # if defined(__linux) && defined(__GLIBC_PREREQ)
194 # if __GLIBC_PREREQ(2,3)
195 /* From atexit() manpage, it's safe with glibc 2.2.3 on Linux. */
196 # define HB_USE_ATEXIT 1
198 # elif defined(_MSC_VER) || defined(__MINGW32__)
200 * http://msdn.microsoft.com/en-ca/library/tze57ck3.aspx
201 * http://msdn.microsoft.com/en-ca/library/zk17ww08.aspx
202 * mingw32 headers say atexit is safe to use in shared libraries.
204 # define HB_USE_ATEXIT 1
205 # elif defined(__ANDROID__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
206 /* This was fixed in Android NKD r8 or r8b:
207 * https://code.google.com/p/android/issues/detail?id=6455
208 * which introduced GCC 4.6:
209 * https://developer.android.com/tools/sdk/ndk/index.html
211 # define HB_USE_ATEXIT 1
219 # define NULL ((void *) 0)
223 template <typename Type>
224 static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
227 template <typename Type>
228 static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
230 static inline unsigned int DIV_CEIL (const unsigned int a, unsigned int b)
231 { return (a + (b - 1)) / b; }
235 template <typename Type, unsigned int n>
236 static inline unsigned int ARRAY_LENGTH (const Type (&)[n]) { return n; }
237 /* A const version, but does not detect erratically being called on pointers. */
238 #define ARRAY_LENGTH_CONST(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))
240 #define HB_STMT_START do
241 #define HB_STMT_END while (0)
243 #define _ASSERT_STATIC1(_line, _cond) HB_UNUSED typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
244 #define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
245 #define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))
247 template <unsigned int cond> class hb_assert_constant_t {};
249 #define ASSERT_STATIC_EXPR_ZERO(_cond) (0 * (unsigned int) sizeof (hb_assert_constant_t<_cond>))
251 #define _PASTE1(a,b) a##b
252 #define PASTE(a,b) _PASTE1(a,b)
254 /* Lets assert int types. Saves trouble down the road. */
256 ASSERT_STATIC (sizeof (int8_t) == 1);
257 ASSERT_STATIC (sizeof (uint8_t) == 1);
258 ASSERT_STATIC (sizeof (int16_t) == 2);
259 ASSERT_STATIC (sizeof (uint16_t) == 2);
260 ASSERT_STATIC (sizeof (int32_t) == 4);
261 ASSERT_STATIC (sizeof (uint32_t) == 4);
262 ASSERT_STATIC (sizeof (int64_t) == 8);
263 ASSERT_STATIC (sizeof (uint64_t) == 8);
265 ASSERT_STATIC (sizeof (hb_codepoint_t) == 4);
266 ASSERT_STATIC (sizeof (hb_position_t) == 4);
267 ASSERT_STATIC (sizeof (hb_mask_t) == 4);
268 ASSERT_STATIC (sizeof (hb_var_int_t) == 4);
271 /* We like our types POD */
273 #define _ASSERT_TYPE_POD1(_line, _type) union _type_##_type##_on_line_##_line##_is_not_POD { _type instance; }
274 #define _ASSERT_TYPE_POD0(_line, _type) _ASSERT_TYPE_POD1 (_line, _type)
275 #define ASSERT_TYPE_POD(_type) _ASSERT_TYPE_POD0 (__LINE__, _type)
278 # define _ASSERT_INSTANCE_POD1(_line, _instance) \
280 typedef __typeof__(_instance) _type_##_line; \
281 _ASSERT_TYPE_POD1 (_line, _type_##_line); \
284 # define _ASSERT_INSTANCE_POD1(_line, _instance) typedef int _assertion_on_line_##_line##_not_tested
286 # define _ASSERT_INSTANCE_POD0(_line, _instance) _ASSERT_INSTANCE_POD1 (_line, _instance)
287 # define ASSERT_INSTANCE_POD(_instance) _ASSERT_INSTANCE_POD0 (__LINE__, _instance)
289 /* Check _assertion in a method environment */
290 #define _ASSERT_POD1(_line) \
291 HB_UNUSED inline void _static_assertion_on_line_##_line (void) const \
292 { _ASSERT_INSTANCE_POD1 (_line, *this); /* Make sure it's POD. */ }
293 # define _ASSERT_POD0(_line) _ASSERT_POD1 (_line)
294 # define ASSERT_POD() _ASSERT_POD0 (__LINE__)
301 struct _hb_void_t {};
302 typedef const _hb_void_t *hb_void_t;
303 #define HB_VOID ((const _hb_void_t *) NULL)
305 /* Return the number of 1 bits in mask. */
306 static inline HB_CONST_FUNC unsigned int
307 _hb_popcount32 (uint32_t mask)
309 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
310 return __builtin_popcount (mask);
314 y = (mask >> 1) &033333333333;
315 y = mask - y - ((y >>1) & 033333333333);
316 return (((y + (y >> 3)) & 030707070707) % 077);
320 /* Returns the number of bits needed to store number */
321 static inline HB_CONST_FUNC unsigned int
322 _hb_bit_storage (unsigned int number)
324 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
325 return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0;
327 unsigned int n_bits = 0;
336 /* Returns the number of zero bits in the least significant side of number */
337 static inline HB_CONST_FUNC unsigned int
338 _hb_ctz (unsigned int number)
340 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
341 return likely (number) ? __builtin_ctz (number) : 0;
343 unsigned int n_bits = 0;
344 if (unlikely (!number)) return 0;
345 while (!(number & 1)) {
354 _hb_unsigned_int_mul_overflows (unsigned int count, unsigned int size)
356 return (size > 0) && (count >= ((unsigned int) -1) / size);
360 /* Type of bsearch() / qsort() compare function */
361 typedef int (*hb_compare_func_t) (const void *, const void *);
366 /* arrays and maps */
369 #define HB_PREALLOCED_ARRAY_INIT {0, 0, NULL}
370 template <typename Type, unsigned int StaticSize=16>
371 struct hb_prealloced_array_t
374 unsigned int allocated;
376 Type static_array[StaticSize];
378 void init (void) { memset (this, 0, sizeof (*this)); }
380 inline Type& operator [] (unsigned int i) { return array[i]; }
381 inline const Type& operator [] (unsigned int i) const { return array[i]; }
383 inline Type *push (void)
386 array = static_array;
387 allocated = ARRAY_LENGTH (static_array);
389 if (likely (len < allocated))
390 return &array[len++];
392 /* Need to reallocate */
393 unsigned int new_allocated = allocated + (allocated >> 1) + 8;
394 Type *new_array = NULL;
396 if (array == static_array) {
397 new_array = (Type *) calloc (new_allocated, sizeof (Type));
399 memcpy (new_array, array, len * sizeof (Type));
401 bool overflows = (new_allocated < allocated) || _hb_unsigned_int_mul_overflows (new_allocated, sizeof (Type));
402 if (likely (!overflows)) {
403 new_array = (Type *) realloc (array, new_allocated * sizeof (Type));
407 if (unlikely (!new_array))
411 allocated = new_allocated;
412 return &array[len++];
415 inline void pop (void)
420 inline void remove (unsigned int i)
422 if (unlikely (i >= len))
424 memmove (static_cast<void *> (&array[i]),
425 static_cast<void *> (&array[i + 1]),
426 (len - i - 1) * sizeof (Type));
430 inline void shrink (unsigned int l)
436 template <typename T>
437 inline Type *find (T v) {
438 for (unsigned int i = 0; i < len; i++)
443 template <typename T>
444 inline const Type *find (T v) const {
445 for (unsigned int i = 0; i < len; i++)
451 inline void qsort (void)
453 ::qsort (array, len, sizeof (Type), (hb_compare_func_t) Type::cmp);
456 inline void qsort (unsigned int start, unsigned int end)
458 ::qsort (array + start, end - start, sizeof (Type), (hb_compare_func_t) Type::cmp);
461 template <typename T>
462 inline Type *bsearch (T *key)
464 return (Type *) ::bsearch (key, array, len, sizeof (Type), (hb_compare_func_t) Type::cmp);
466 template <typename T>
467 inline const Type *bsearch (T *key) const
469 return (const Type *) ::bsearch (key, array, len, sizeof (Type), (hb_compare_func_t) Type::cmp);
472 inline void finish (void)
474 if (array != static_array)
481 template <typename Type>
482 struct hb_auto_array_t : hb_prealloced_array_t <Type>
484 hb_auto_array_t (void) { hb_prealloced_array_t<Type>::init (); }
485 ~hb_auto_array_t (void) { hb_prealloced_array_t<Type>::finish (); }
489 #define HB_LOCKABLE_SET_INIT {HB_PREALLOCED_ARRAY_INIT}
490 template <typename item_t, typename lock_t>
491 struct hb_lockable_set_t
493 hb_prealloced_array_t <item_t, 2> items;
495 inline void init (void) { items.init (); }
497 template <typename T>
498 inline item_t *replace_or_insert (T v, lock_t &l, bool replace)
501 item_t *item = items.find (v);
514 item = items.push ();
522 template <typename T>
523 inline void remove (T v, lock_t &l)
526 item_t *item = items.find (v);
529 *item = items[items.len - 1];
538 template <typename T>
539 inline bool find (T v, item_t *i, lock_t &l)
542 item_t *item = items.find (v);
549 template <typename T>
550 inline item_t *find_or_insert (T v, lock_t &l)
553 item_t *item = items.find (v);
555 item = items.push ();
563 inline void finish (lock_t &l)
566 /* No need for locking. */
572 item_t old = items[items.len - 1];
585 /* ASCII tag/character handling */
587 static inline bool ISALPHA (unsigned char c)
588 { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); }
589 static inline bool ISALNUM (unsigned char c)
590 { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'); }
591 static inline bool ISSPACE (unsigned char c)
592 { return c == ' ' || c =='\f'|| c =='\n'|| c =='\r'|| c =='\t'|| c =='\v'; }
593 static inline unsigned char TOUPPER (unsigned char c)
594 { return (c >= 'a' && c <= 'z') ? c - 'a' + 'A' : c; }
595 static inline unsigned char TOLOWER (unsigned char c)
596 { return (c >= 'A' && c <= 'Z') ? c - 'A' + 'a' : c; }
598 #define HB_TAG_CHAR4(s) (HB_TAG(((const char *) s)[0], \
599 ((const char *) s)[1], \
600 ((const char *) s)[2], \
601 ((const char *) s)[3]))
606 /* Makes class uncopyable. Use in private: section. */
609 T &operator = (const T &o)
615 /* HB_NDEBUG disables some sanity checks that are very safe to disable and
616 * should be disabled in production systems. If NDEBUG is defined, enable
617 * HB_NDEBUG; but if it's desirable that normal assert()s (which are very
618 * light-weight) to be enabled, then HB_DEBUG can be defined to disable
619 * the costlier checks. */
629 _hb_debug (unsigned int level,
630 unsigned int max_level)
632 return level < max_level;
635 #define DEBUG_LEVEL_ENABLED(WHAT, LEVEL) (_hb_debug ((LEVEL), HB_DEBUG_##WHAT))
636 #define DEBUG_ENABLED(WHAT) (DEBUG_LEVEL_ENABLED (WHAT, 0))
639 _hb_print_func (const char *func)
643 unsigned int func_len = strlen (func);
645 if (0 == strncmp (func, "static ", 7))
647 /* Skip "typename" */
648 if (0 == strncmp (func, "typename ", 9))
650 /* Skip return type */
651 const char *space = strchr (func, ' ');
654 /* Skip parameter list */
655 const char *paren = strchr (func, '(');
657 func_len = paren - func;
658 fprintf (stderr, "%.*s", func_len, func);
662 template <int max_level> static inline void
663 _hb_debug_msg_va (const char *what,
670 va_list ap) HB_PRINTF_FUNC(7, 0);
671 template <int max_level> static inline void
672 _hb_debug_msg_va (const char *what,
681 if (!_hb_debug (level, max_level))
684 fprintf (stderr, "%-10s", what ? what : "");
687 fprintf (stderr, "(%0*lx) ", (unsigned int) (2 * sizeof (void *)), (unsigned long) obj);
689 fprintf (stderr, " %*s ", (unsigned int) (2 * sizeof (void *)), "");
692 /* One may want to add ASCII version of these. See:
693 * https://bugs.freedesktop.org/show_bug.cgi?id=50970 */
694 #define VBAR "\342\224\202" /* U+2502 BOX DRAWINGS LIGHT VERTICAL */
695 #define VRBAR "\342\224\234" /* U+251C BOX DRAWINGS LIGHT VERTICAL AND RIGHT */
696 #define DLBAR "\342\225\256" /* U+256E BOX DRAWINGS LIGHT ARC DOWN AND LEFT */
697 #define ULBAR "\342\225\257" /* U+256F BOX DRAWINGS LIGHT ARC UP AND LEFT */
698 #define LBAR "\342\225\264" /* U+2574 BOX DRAWINGS LIGHT LEFT */
699 static const char bars[] = VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR;
700 fprintf (stderr, "%2u %s" VRBAR "%s",
702 bars + sizeof (bars) - 1 - MIN ((unsigned int) sizeof (bars), (unsigned int) (sizeof (VBAR) - 1) * level),
703 level_dir ? (level_dir > 0 ? DLBAR : ULBAR) : LBAR);
705 fprintf (stderr, " " VRBAR LBAR);
707 _hb_print_func (func);
711 fprintf (stderr, ": ");
712 vfprintf (stderr, message, ap);
715 fprintf (stderr, "\n");
717 template <> inline void
718 _hb_debug_msg_va<0> (const char *what HB_UNUSED,
719 const void *obj HB_UNUSED,
720 const char *func HB_UNUSED,
721 bool indented HB_UNUSED,
722 unsigned int level HB_UNUSED,
723 int level_dir HB_UNUSED,
724 const char *message HB_UNUSED,
725 va_list ap HB_UNUSED) {}
727 template <int max_level> static inline void
728 _hb_debug_msg (const char *what,
735 ...) HB_PRINTF_FUNC(7, 8);
736 template <int max_level> static inline void
737 _hb_debug_msg (const char *what,
747 va_start (ap, message);
748 _hb_debug_msg_va<max_level> (what, obj, func, indented, level, level_dir, message, ap);
751 template <> inline void
752 _hb_debug_msg<0> (const char *what HB_UNUSED,
753 const void *obj HB_UNUSED,
754 const char *func HB_UNUSED,
755 bool indented HB_UNUSED,
756 unsigned int level HB_UNUSED,
757 int level_dir HB_UNUSED,
758 const char *message HB_UNUSED,
759 ...) HB_PRINTF_FUNC(7, 8);
760 template <> inline void
761 _hb_debug_msg<0> (const char *what HB_UNUSED,
762 const void *obj HB_UNUSED,
763 const char *func HB_UNUSED,
764 bool indented HB_UNUSED,
765 unsigned int level HB_UNUSED,
766 int level_dir HB_UNUSED,
767 const char *message HB_UNUSED,
770 #define DEBUG_MSG_LEVEL(WHAT, OBJ, LEVEL, LEVEL_DIR, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), NULL, true, (LEVEL), (LEVEL_DIR), __VA_ARGS__)
771 #define DEBUG_MSG(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), NULL, false, 0, 0, __VA_ARGS__)
772 #define DEBUG_MSG_FUNC(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), HB_FUNC, false, 0, 0, __VA_ARGS__)
779 template <typename T>
780 struct hb_printer_t {
781 const char *print (const T&) { return "something"; }
785 struct hb_printer_t<bool> {
786 const char *print (bool v) { return v ? "true" : "false"; }
790 struct hb_printer_t<hb_void_t> {
791 const char *print (hb_void_t) { return ""; }
799 template <typename T>
800 static inline void _hb_warn_no_return (bool returned)
802 if (unlikely (!returned)) {
803 fprintf (stderr, "OUCH, returned with no call to return_trace(). This is a bug, please report.\n");
807 /*static*/ inline void _hb_warn_no_return<hb_void_t> (bool returned HB_UNUSED)
810 template <int max_level, typename ret_t>
811 struct hb_auto_trace_t {
812 explicit inline hb_auto_trace_t (unsigned int *plevel_,
817 ...) : plevel (plevel_), what (what_), obj (obj_), returned (false)
819 if (plevel) ++*plevel;
822 va_start (ap, message);
823 _hb_debug_msg_va<max_level> (what, obj, func, true, plevel ? *plevel : 0, +1, message, ap);
826 inline ~hb_auto_trace_t (void)
828 _hb_warn_no_return<ret_t> (returned);
830 _hb_debug_msg<max_level> (what, obj, NULL, true, plevel ? *plevel : 1, -1, " ");
832 if (plevel) --*plevel;
835 inline ret_t ret (ret_t v, unsigned int line = 0)
837 if (unlikely (returned)) {
838 fprintf (stderr, "OUCH, double calls to return_trace(). This is a bug, please report.\n");
842 _hb_debug_msg<max_level> (what, obj, NULL, true, plevel ? *plevel : 1, -1,
843 "return %s (line %d)",
844 hb_printer_t<ret_t>().print (v), line);
845 if (plevel) --*plevel;
852 unsigned int *plevel;
857 template <typename ret_t> /* Optimize when tracing is disabled */
858 struct hb_auto_trace_t<0, ret_t> {
859 explicit inline hb_auto_trace_t (unsigned int *plevel_ HB_UNUSED,
860 const char *what HB_UNUSED,
861 const void *obj HB_UNUSED,
862 const char *func HB_UNUSED,
863 const char *message HB_UNUSED,
866 inline ret_t ret (ret_t v, unsigned int line HB_UNUSED = 0) { return v; }
869 #define return_trace(RET) return trace.ret (RET, __LINE__)
873 template <typename T> class hb_assert_unsigned_t;
874 template <> class hb_assert_unsigned_t<unsigned char> {};
875 template <> class hb_assert_unsigned_t<unsigned short> {};
876 template <> class hb_assert_unsigned_t<unsigned int> {};
877 template <> class hb_assert_unsigned_t<unsigned long> {};
879 template <typename T> static inline bool
880 hb_in_range (T u, T lo, T hi)
882 /* The sizeof() is here to force template instantiation.
883 * I'm sure there are better ways to do this but can't think of
884 * one right now. Declaring a variable won't work as HB_UNUSED
885 * is unusable on some platforms and unused types are less likely
886 * to generate a warning than unused variables. */
887 ASSERT_STATIC (sizeof (hb_assert_unsigned_t<T>) >= 0);
889 /* The casts below are important as if T is smaller than int,
890 * the subtract results will become a signed int! */
891 return (T)(u - lo) <= (T)(hi - lo);
894 template <typename T> static inline bool
895 hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2)
897 return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2);
900 template <typename T> static inline bool
901 hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2, T lo3, T hi3)
903 return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2) || hb_in_range (u, lo3, hi3);
907 /* Enable bitwise ops on enums marked as flags_t */
908 /* To my surprise, looks like the function resolver is happy to silently cast
909 * one enum to another... So this doesn't provide the type-checking that I
910 * originally had in mind... :(.
912 * For MSVC warnings, see: https://github.com/behdad/harfbuzz/pull/163
915 # pragma warning(disable:4200)
916 # pragma warning(disable:4800)
918 #define HB_MARK_AS_FLAG_T(T) \
920 static inline T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
921 static inline T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
922 static inline T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
923 static inline T operator ~ (T r) { return T (~(unsigned int) r); } \
924 static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
925 static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
926 static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
930 /* Useful for set-operations on small enums.
931 * For example, for testing "x ∈ {x1, x2, x3}" use:
932 * (FLAG_SAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
934 #define FLAG(x) (ASSERT_STATIC_EXPR_ZERO ((x) < 32) + (1U << (x)))
935 #define FLAG_SAFE(x) (1U << (x))
936 #define FLAG_UNSAFE(x) ((x) < 32 ? FLAG_SAFE(x) : 0)
937 #define FLAG_RANGE(x,y) (ASSERT_STATIC_EXPR_ZERO ((x) < (y)) + FLAG(y+1) - FLAG(x))
940 template <typename T, typename T2> static inline void
941 hb_stable_sort (T *array, unsigned int len, int(*compar)(const T *, const T *), T2 *array2)
943 for (unsigned int i = 1; i < len; i++)
946 while (j && compar (&array[j - 1], &array[i]) > 0)
950 /* Move item i to occupy place for item j, shift what's in between. */
953 memmove (&array[j + 1], &array[j], (i - j) * sizeof (T));
959 memmove (&array2[j + 1], &array2[j], (i - j) * sizeof (T2));
965 template <typename T> static inline void
966 hb_stable_sort (T *array, unsigned int len, int(*compar)(const T *, const T *))
968 hb_stable_sort (array, len, compar, (int *) NULL);
971 static inline hb_bool_t
972 hb_codepoint_parse (const char *s, unsigned int len, int base, hb_codepoint_t *out)
974 /* Pain because we don't know whether s is nul-terminated. */
976 len = MIN (ARRAY_LENGTH (buf) - 1, len);
977 strncpy (buf, s, len);
982 unsigned long v = strtoul (buf, &end, base);
983 if (errno) return false;
984 if (*end) return false;
990 /* Global runtime options. */
994 unsigned int initialized : 1;
995 unsigned int uniscribe_bug_compatible : 1;
998 union hb_options_union_t {
1002 ASSERT_STATIC (sizeof (int) == sizeof (hb_options_union_t));
1005 _hb_options_init (void);
1007 extern HB_INTERNAL hb_options_union_t _hb_options;
1009 static inline hb_options_t
1012 if (unlikely (!_hb_options.i))
1013 _hb_options_init ();
1015 return _hb_options.opts;
1018 /* Size signifying variable-sized array */
1021 #endif /* HB_PRIVATE_HH */