1 /*
2 * Copyright © 2007,2008,2009 Red Hat, Inc.
3 * Copyright © 2011,2012 Google, Inc.
4 *
5 * This is part of HarfBuzz, a text shaping library.
6 *
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.
12 *
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
17 * DAMAGE.
18 *
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.
24 *
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
27 */
28
29 #ifndef HB_HH
30 #define HB_HH
31
32 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC
33 #if defined(_MSC_VER)
34 #pragma warning( disable: 4068 ) /* Unknown pragma */
35 #endif
36 #if defined(__GNUC__) || defined(__clang__)
37 /* Rules:
38 *
39 * - All pragmas are declared GCC even if they are clang ones. Otherwise GCC
40 * nags, even though we instruct it to ignore -Wunknown-pragmas. ¯\_(ツ)_/¯
41 *
42 * - Within each category, keep sorted.
43 *
44 * - Warnings whose scope can be expanded in future compiler versions shall
45 * be declared as "warning". Otherwise, either ignored or error.
46 */
47
48 /* Setup. Don't sort order within this category. */
49 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
50 #pragma GCC diagnostic warning "-Wall"
51 #pragma GCC diagnostic warning "-Wextra"
52 #endif
53 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
54 #pragma GCC diagnostic ignored "-Wpragmas"
55 #pragma GCC diagnostic ignored "-Wunknown-pragmas"
56 #pragma GCC diagnostic ignored "-Wunknown-warning-option"
57 #endif
58 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
59 //#pragma GCC diagnostic warning "-Weverything"
60 #endif
61
62 /* Error. Should never happen. */
63 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_ERROR
64 #pragma GCC diagnostic error "-Wc++11-narrowing"
65 #pragma GCC diagnostic error "-Wcast-align"
66 #pragma GCC diagnostic error "-Wcast-function-type"
67 #pragma GCC diagnostic error "-Wdelete-non-virtual-dtor"
68 #pragma GCC diagnostic error "-Wformat-security"
69 #pragma GCC diagnostic error "-Wimplicit-function-declaration"
70 #pragma GCC diagnostic error "-Winit-self"
71 #pragma GCC diagnostic error "-Wmissing-braces"
72 #pragma GCC diagnostic error "-Wmissing-declarations"
73 #pragma GCC diagnostic error "-Wmissing-prototypes"
74 #pragma GCC diagnostic error "-Wnested-externs"
75 #pragma GCC diagnostic error "-Wold-style-definition"
76 #pragma GCC diagnostic error "-Wpointer-arith"
77 #pragma GCC diagnostic error "-Wredundant-decls"
78 #pragma GCC diagnostic error "-Wreorder"
79 #pragma GCC diagnostic error "-Wsign-compare"
80 #pragma GCC diagnostic error "-Wstrict-prototypes"
81 #pragma GCC diagnostic error "-Wstring-conversion"
82 #pragma GCC diagnostic error "-Wswitch-enum"
83 #pragma GCC diagnostic error "-Wtautological-overlap-compare"
84 #pragma GCC diagnostic error "-Wunneeded-internal-declaration"
85 #pragma GCC diagnostic error "-Wunused"
86 #pragma GCC diagnostic error "-Wunused-local-typedefs"
87 #pragma GCC diagnostic error "-Wunused-value"
88 #pragma GCC diagnostic error "-Wunused-variable"
89 #pragma GCC diagnostic error "-Wvla"
90 #pragma GCC diagnostic error "-Wwrite-strings"
91 #endif
92
93 /* Warning. To be investigated if happens. */
94 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
95 #pragma GCC diagnostic warning "-Wbuiltin-macro-redefined"
96 #pragma GCC diagnostic warning "-Wdisabled-optimization"
97 #pragma GCC diagnostic warning "-Wformat=2"
98 #pragma GCC diagnostic warning "-Wignored-pragma-optimize"
99 #pragma GCC diagnostic warning "-Wlogical-op"
100 #pragma GCC diagnostic warning "-Wmaybe-uninitialized"
101 #pragma GCC diagnostic warning "-Wmissing-format-attribute"
102 #pragma GCC diagnostic warning "-Wundef"
103 #endif
104
105 /* Ignored currently, but should be fixed at some point. */
106 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
107 #pragma GCC diagnostic ignored "-Wconversion" // TODO fix
108 #pragma GCC diagnostic ignored "-Wformat-signedness" // TODO fix
109 #pragma GCC diagnostic ignored "-Wshadow" // TODO fix
110 #pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations" // TODO fix
111 #pragma GCC diagnostic ignored "-Wunused-parameter" // TODO fix
112 #endif
113
114 /* Ignored intentionally. */
115 #ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
116 #pragma GCC diagnostic ignored "-Wclass-memaccess"
117 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
118 #pragma GCC diagnostic ignored "-Wformat-zero-length"
119 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
120 #pragma GCC diagnostic ignored "-Wpacked" // Erratic impl in clang
121 #pragma GCC diagnostic ignored "-Wstrict-aliasing"
122 #pragma GCC diagnostic ignored "-Wtype-limits"
123 #endif
124
125 #endif
126 #endif
127
128 #ifdef HAVE_CONFIG_H
129 #include "config.h"
130 #endif
131
132 /*
133 * Following added based on what AC_USE_SYSTEM_EXTENSIONS adds to
134 * config.h.in. Copied here for the convenience of those embedding
135 * HarfBuzz and not using our build system.
136 */
137 /* Enable extensions on AIX 3, Interix. */
138 #ifndef _ALL_SOURCE
139 # define _ALL_SOURCE 1
140 #endif
141 /* Enable GNU extensions on systems that have them. */
142 #ifndef _GNU_SOURCE
143 # define _GNU_SOURCE 1
144 #endif
145 /* Enable threading extensions on Solaris. */
146 #ifndef _POSIX_PTHREAD_SEMANTICS
147 # define _POSIX_PTHREAD_SEMANTICS 1
148 #endif
149 /* Enable extensions on HP NonStop. */
150 #ifndef _TANDEM_SOURCE
151 # define _TANDEM_SOURCE 1
152 #endif
153 /* Enable general extensions on Solaris. */
154 #ifndef __EXTENSIONS__
155 # define __EXTENSIONS__ 1
156 #endif
157
158 #if defined (_MSC_VER) && defined (HB_DLL_EXPORT)
159 #define HB_EXTERN __declspec (dllexport) extern
160 #endif
161
162 #include "hb.h"
163 #define HB_H_IN
164 #include "hb-ot.h"
165 #define HB_OT_H_IN
166 #include "hb-aat.h"
167 #define HB_AAT_H_IN
168
169 #include "hb-aat.h"
170
171 #include <math.h>
172 #include <stdlib.h>
173 #include <stddef.h>
174 #include <string.h>
175 #include <assert.h>
176 #include <errno.h>
177 #include <stdio.h>
178 #include <stdarg.h>
179
180 #if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
181 #include <intrin.h>
182 #endif
183
184 #define HB_PASTE1(a,b) a##b
185 #define HB_PASTE(a,b) HB_PASTE1(a,b)
186
187
188 /* Compile-time custom allocator support. */
189
190 #if defined(hb_malloc_impl) \
191 && defined(hb_calloc_impl) \
192 && defined(hb_realloc_impl) \
193 && defined(hb_free_impl)
194 extern "C" void* hb_malloc_impl(size_t size);
195 extern "C" void* hb_calloc_impl(size_t nmemb, size_t size);
196 extern "C" void* hb_realloc_impl(void *ptr, size_t size);
197 extern "C" void hb_free_impl(void *ptr);
198 #define malloc hb_malloc_impl
199 #define calloc hb_calloc_impl
200 #define realloc hb_realloc_impl
201 #define free hb_free_impl
202
203 #if defined(hb_memalign_impl)
204 extern "C" int hb_memalign_impl(void **memptr, size_t alignment, size_t size);
205 #define posix_memalign hb_memalign_impl
206 #else
207 #undef HAVE_POSIX_MEMALIGN
208 #endif
209
210 #endif
211
212
213 /*
214 * Compiler attributes
215 */
216
217 #if __cplusplus < 201103L
218
219 #ifndef nullptr
220 #define nullptr NULL
221 #endif
222
223 #ifndef constexpr
224 #define constexpr const
225 #endif
226
227 #ifndef static_assert
228 #define static_assert(e, msg) \
229 HB_UNUSED typedef int HB_PASTE(static_assertion_failed_at_line_, __LINE__) [(e) ? 1 : -1]
230 #endif // static_assert
231
232 #if defined(__GNUC__)
233 #if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8))
234 #define thread_local __thread
235 #endif
236 #else
237 #define thread_local
238 #endif
239
240 template <typename T>
241 struct _hb_alignof
242 {
243 struct s
244 {
245 char c;
246 T t;
247 };
248 static constexpr size_t value = offsetof (s, t);
249 };
250 #ifndef alignof
251 #define alignof(x) (_hb_alignof<x>::value)
252 #endif
253
254 /* https://github.com/harfbuzz/harfbuzz/issues/1127 */
255 #ifndef explicit_operator
256 #define explicit_operator operator
257 #endif
258
259 #else /* __cplusplus >= 201103L */
260
261 /* https://github.com/harfbuzz/harfbuzz/issues/1127 */
262 #ifndef explicit_operator
263 #define explicit_operator explicit operator
264 #endif
265
266 #endif /* __cplusplus < 201103L */
267
268
269 #if (defined(__GNUC__) || defined(__clang__)) && defined(__OPTIMIZE__)
270 #define likely(expr) (__builtin_expect (!!(expr), 1))
271 #define unlikely(expr) (__builtin_expect (!!(expr), 0))
272 #else
273 #define likely(expr) (expr)
274 #define unlikely(expr) (expr)
275 #endif
276
277 #if !defined(__GNUC__) && !defined(__clang__)
278 #undef __attribute__
279 #define __attribute__(x)
280 #endif
281
282 #if defined(__GNUC__) && (__GNUC__ >= 3)
283 #define HB_PURE_FUNC __attribute__((pure))
284 #define HB_CONST_FUNC __attribute__((const))
285 #define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
286 #else
287 #define HB_PURE_FUNC
288 #define HB_CONST_FUNC
289 #define HB_PRINTF_FUNC(format_idx, arg_idx)
290 #endif
291 #if defined(__GNUC__) && (__GNUC__ >= 4)
292 #define HB_UNUSED __attribute__((unused))
293 #elif defined(_MSC_VER) /* https://github.com/harfbuzz/harfbuzz/issues/635 */
294 #define HB_UNUSED __pragma(warning(suppress: 4100 4101))
295 #else
296 #define HB_UNUSED
297 #endif
298
299 #ifndef HB_INTERNAL
300 # if !defined(HB_NO_VISIBILITY) && !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(_MSC_VER) && !defined(__SUNPRO_CC)
301 # define HB_INTERNAL __attribute__((__visibility__("hidden")))
302 # elif defined(__MINGW32__)
303 /* We use -export-symbols on mingw32, since it does not support visibility attributes. */
304 # define HB_INTERNAL
305 # elif defined (_MSC_VER) && defined (HB_DLL_EXPORT)
306 /* We do not try to export internal symbols on Visual Studio */
307 # define HB_INTERNAL
308 #else
309 # define HB_INTERNAL
310 # define HB_NO_VISIBILITY 1
311 # endif
312 #endif
313
314 #if defined(__GNUC__) && (__GNUC__ >= 3)
315 #define HB_FUNC __PRETTY_FUNCTION__
316 #elif defined(_MSC_VER)
317 #define HB_FUNC __FUNCSIG__
318 #else
319 #define HB_FUNC __func__
320 #endif
321
322 #if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5140)
323 /* https://github.com/harfbuzz/harfbuzz/issues/630 */
324 #define __restrict
325 #endif
326
327 /*
328 * Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
329 * HB_FALLTHROUGH is an annotation to suppress compiler warnings about switch
330 * cases that fall through without a break or return statement. HB_FALLTHROUGH
331 * is only needed on cases that have code:
332 *
333 * switch (foo) {
334 * case 1: // These cases have no code. No fallthrough annotations are needed.
335 * case 2:
336 * case 3:
337 * foo = 4; // This case has code, so a fallthrough annotation is needed:
338 * HB_FALLTHROUGH;
339 * default:
340 * return foo;
341 * }
342 */
343 #if defined(__clang__) && __cplusplus >= 201103L
344 /* clang's fallthrough annotations are only available starting in C++11. */
345 # define HB_FALLTHROUGH [[clang::fallthrough]]
346 #elif defined(__GNUC__) && (__GNUC__ >= 7)
347 /* GNU fallthrough attribute is available from GCC7 */
348 # define HB_FALLTHROUGH __attribute__((fallthrough))
349 #elif defined(_MSC_VER)
350 /*
351 * MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):
352 * https://msdn.microsoft.com/en-us/library/ms235402%28VS.80%29.aspx
353 */
354 # include <sal.h>
355 # define HB_FALLTHROUGH __fallthrough
356 #else
357 # define HB_FALLTHROUGH /* FALLTHROUGH */
358 #endif
359
360 #if defined(__clang__)
361 /* Disable certain sanitizer errors. */
362 /* https://github.com/harfbuzz/harfbuzz/issues/1247 */
363 #define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW __attribute__((no_sanitize("signed-integer-overflow")))
364 #else
365 #define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW
366 #endif
367
368
369 #ifdef _WIN32
370 /* We need Windows Vista for both Uniscribe backend and for
371 * MemoryBarrier. We don't support compiling on Windows XP,
372 * though we run on it fine. */
373 # if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
374 # undef _WIN32_WINNT
375 # endif
376 # ifndef _WIN32_WINNT
377 # if !defined(WINAPI_FAMILY) || !(WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP)
378 # define _WIN32_WINNT 0x0600
379 # endif
380 # endif
381 # ifndef WIN32_LEAN_AND_MEAN
382 # define WIN32_LEAN_AND_MEAN 1
383 # endif
384 # ifndef STRICT
385 # define STRICT 1
386 # endif
387
388 # if defined(_WIN32_WCE)
389 /* Some things not defined on Windows CE. */
390 # define vsnprintf _vsnprintf
391 # define getenv(Name) nullptr
392 # if _WIN32_WCE < 0x800
393 # define setlocale(Category, Locale) "C"
394 static int errno = 0; /* Use something better? */
395 # endif
396 # elif defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP)
397 # define getenv(Name) nullptr
398 # endif
399 # if defined(_MSC_VER) && _MSC_VER < 1900
400 # define snprintf _snprintf
401 # endif
402 #endif
403
404 #if defined(HAVE_ATEXIT) && !defined(HB_USE_ATEXIT)
405 /* atexit() is only safe to be called from shared libraries on certain
406 * platforms. Whitelist.
407 * https://bugs.freedesktop.org/show_bug.cgi?id=82246 */
408 # if defined(__linux) && defined(__GLIBC_PREREQ)
409 # if __GLIBC_PREREQ(2,3)
410 /* From atexit() manpage, it's safe with glibc 2.2.3 on Linux. */
411 # define HB_USE_ATEXIT 1
412 # endif
413 # elif defined(_MSC_VER) || defined(__MINGW32__)
414 /* For MSVC:
415 * https://msdn.microsoft.com/en-us/library/tze57ck3.aspx
416 * https://msdn.microsoft.com/en-us/library/zk17ww08.aspx
417 * mingw32 headers say atexit is safe to use in shared libraries.
418 */
419 # define HB_USE_ATEXIT 1
420 # elif defined(__ANDROID__)
421 /* This is available since Android NKD r8 or r8b:
422 * https://issuetracker.google.com/code/p/android/issues/detail?id=6455
423 */
424 # define HB_USE_ATEXIT 1
425 # elif defined(__APPLE__)
426 /* For macOS and related platforms, the atexit man page indicates
427 * that it will be invoked when the library is unloaded, not only
428 * at application exit.
429 */
430 # define HB_USE_ATEXIT 1
431 # endif
432 #endif
433 #ifdef HB_NO_ATEXIT
434 # undef HB_USE_ATEXIT
435 #endif
436 #ifndef HB_USE_ATEXIT
437 # define HB_USE_ATEXIT 0
438 #endif
439
440 #define HB_STMT_START do
441 #define HB_STMT_END while (0)
442
443 /* Static-assert as expression. */
444 template <unsigned int cond> class hb_assert_constant_t;
445 template <> class hb_assert_constant_t<1> {};
446 #define ASSERT_STATIC_EXPR_ZERO(_cond) (0 * (unsigned int) sizeof (hb_assert_constant_t<_cond>))
447
448 /* Lets assert int types. Saves trouble down the road. */
449 static_assert ((sizeof (int8_t) == 1), "");
450 static_assert ((sizeof (uint8_t) == 1), "");
451 static_assert ((sizeof (int16_t) == 2), "");
452 static_assert ((sizeof (uint16_t) == 2), "");
453 static_assert ((sizeof (int32_t) == 4), "");
454 static_assert ((sizeof (uint32_t) == 4), "");
455 static_assert ((sizeof (int64_t) == 8), "");
456 static_assert ((sizeof (uint64_t) == 8), "");
457 static_assert ((sizeof (hb_codepoint_t) == 4), "");
458 static_assert ((sizeof (hb_position_t) == 4), "");
459 static_assert ((sizeof (hb_mask_t) == 4), "");
460 static_assert ((sizeof (hb_var_int_t) == 4), "");
461
462
463 #if __cplusplus >= 201103L
464
465 /* We only enable these with C++11 or later, since earlier language
466 * does not allow structs with constructors in unions, and we need
467 * those. */
468
469 #define HB_NO_COPY_ASSIGN(TypeName) \
470 TypeName(const TypeName&); \
471 void operator=(const TypeName&)
472 #define HB_NO_COPY_ASSIGN_TEMPLATE(TypeName, T) \
473 TypeName(const TypeName<T>&); \
474 void operator=(const TypeName<T>&)
475 #define HB_NO_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) \
476 TypeName(const TypeName<T1, T2>&); \
477 void operator=(const TypeName<T1, T2>&)
478 #define HB_NO_CREATE_COPY_ASSIGN(TypeName) \
479 TypeName(); \
480 TypeName(const TypeName&); \
481 void operator=(const TypeName&)
482 #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE(TypeName, T) \
483 TypeName(); \
484 TypeName(const TypeName<T>&); \
485 void operator=(const TypeName<T>&)
486 #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) \
487 TypeName(); \
488 TypeName(const TypeName<T1, T2>&); \
489 void operator=(const TypeName<T1, T2>&)
490
491 #else /* __cpluspplus >= 201103L */
492
493 #define HB_NO_COPY_ASSIGN(TypeName) static_assert (true, "")
494 #define HB_NO_COPY_ASSIGN_TEMPLATE(TypeName, T) static_assert (true, "")
495 #define HB_NO_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) static_assert (true, "")
496 #define HB_NO_CREATE_COPY_ASSIGN(TypeName) static_assert (true, "")
497 #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE(TypeName, T) static_assert (true, "")
498 #define HB_NO_CREATE_COPY_ASSIGN_TEMPLATE2(TypeName, T1, T2) static_assert (true, "")
499
500 #endif /* __cpluspplus >= 201103L */
501
502
503 /*
504 * Compiler-assisted vectorization parameters.
505 */
506
507 /*
508 * Disable vectorization for now. To correctly use them, we should
509 * use posix_memalign() to allocate in hb_vector_t. Otherwise, can
510 * cause misaligned access.
511 *
512 * https://bugs.chromium.org/p/chromium/issues/detail?id=860184
513 */
514 #if !defined(HB_VECTOR_SIZE)
515 # define HB_VECTOR_SIZE 0
516 #endif
517
518 /* The `vector_size' attribute was introduced in gcc 3.1. */
519 #if !defined(HB_VECTOR_SIZE)
520 # if defined( __GNUC__ ) && ( __GNUC__ >= 4 )
521 # define HB_VECTOR_SIZE 128
522 # else
523 # define HB_VECTOR_SIZE 0
524 # endif
525 #endif
526 static_assert (0 == (HB_VECTOR_SIZE & (HB_VECTOR_SIZE - 1)), "HB_VECTOR_SIZE is not power of 2.");
527 static_assert (0 == (HB_VECTOR_SIZE % 64), "HB_VECTOR_SIZE is not multiple of 64.");
528 #if HB_VECTOR_SIZE
529 typedef uint64_t hb_vector_size_impl_t __attribute__((vector_size (HB_VECTOR_SIZE / 8)));
530 #else
531 typedef uint64_t hb_vector_size_impl_t;
532 #endif
533
534
535 /* HB_NDEBUG disables some sanity checks that are very safe to disable and
536 * should be disabled in production systems. If NDEBUG is defined, enable
537 * HB_NDEBUG; but if it's desirable that normal assert()s (which are very
538 * light-weight) to be enabled, then HB_DEBUG can be defined to disable
539 * the costlier checks. */
540 #ifdef NDEBUG
541 #define HB_NDEBUG 1
542 #endif
543
544
545 /* Flags */
546
547 /* Enable bitwise ops on enums marked as flags_t */
548 /* To my surprise, looks like the function resolver is happy to silently cast
549 * one enum to another... So this doesn't provide the type-checking that I
550 * originally had in mind... :(.
551 *
552 * For MSVC warnings, see: https://github.com/harfbuzz/harfbuzz/pull/163
553 */
554 #ifdef _MSC_VER
555 # pragma warning(disable:4200)
556 # pragma warning(disable:4800)
557 #endif
558 #define HB_MARK_AS_FLAG_T(T) \
559 extern "C++" { \
560 static inline T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
561 static inline T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
562 static inline T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
563 static inline T operator ~ (T r) { return T (~(unsigned int) r); } \
564 static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
565 static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
566 static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
567 } \
568 static_assert (true, "")
569
570 /* Useful for set-operations on small enums.
571 * For example, for testing "x ∈ {x1, x2, x3}" use:
572 * (FLAG_UNSAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
573 */
574 #define FLAG(x) (ASSERT_STATIC_EXPR_ZERO ((unsigned)(x) < 32) + (((uint32_t) 1U) << (unsigned)(x)))
575 #define FLAG_UNSAFE(x) ((unsigned)(x) < 32 ? (((uint32_t) 1U) << (unsigned)(x)) : 0)
576 #define FLAG_RANGE(x,y) (ASSERT_STATIC_EXPR_ZERO ((x) < (y)) + FLAG(y+1) - FLAG(x))
577 #define FLAG64(x) (ASSERT_STATIC_EXPR_ZERO ((unsigned)(x) < 64) + (((uint64_t) 1ULL) << (unsigned)(x)))
578 #define FLAG64_UNSAFE(x) ((unsigned)(x) < 64 ? (((uint64_t) 1ULL) << (unsigned)(x)) : 0)
579
580
581 /* Size signifying variable-sized array */
582 #define VAR 1
583
584
585 /* fallback for round() */
586 static inline double
_hb_round(double x)587 _hb_round (double x)
588 {
589 if (x >= 0)
590 return floor (x + 0.5);
591 else
592 return ceil (x - 0.5);
593 }
594 #if !defined (HAVE_ROUND) && !defined (HAVE_DECL_ROUND)
595 #define round(x) _hb_round(x)
596 #endif
597
598
599 /* fallback for posix_memalign() */
600 static inline int
_hb_memalign(void ** memptr,size_t alignment,size_t size)601 _hb_memalign(void **memptr, size_t alignment, size_t size)
602 {
603 if (unlikely (0 != (alignment & (alignment - 1)) ||
604 !alignment ||
605 0 != (alignment & (sizeof (void *) - 1))))
606 return EINVAL;
607
608 char *p = (char *) malloc (size + alignment - 1);
609 if (unlikely (!p))
610 return ENOMEM;
611
612 size_t off = (size_t) p & (alignment - 1);
613 if (off)
614 p += alignment - off;
615
616 *memptr = (void *) p;
617
618 return 0;
619 }
620 #if !defined(posix_memalign) && !defined(HAVE_POSIX_MEMALIGN)
621 #define posix_memalign _hb_memalign
622 #endif
623
624
625 /*
626 * For lack of a better place, put Zawgyi script hack here.
627 * https://github.com/harfbuzz/harfbuzz/issues/1162
628 */
629
630 #define HB_SCRIPT_MYANMAR_ZAWGYI ((hb_script_t) HB_TAG ('Q','a','a','g'))
631
632
633 /* Some really basic things everyone wants. */
634 template <typename T> struct hb_remove_const { typedef T value; };
635 template <typename T> struct hb_remove_const<const T> { typedef T value; };
636 #define hb_remove_const(T) hb_remove_const<T>::value
637 template <typename T> struct hb_remove_reference { typedef T value; };
638 template <typename T> struct hb_remove_reference<T &> { typedef T value; };
639 #define hb_remove_reference(T) hb_remove_reference<T>::value
640 template <typename T> struct hb_remove_pointer { typedef T value; };
641 template <typename T> struct hb_remove_pointer<T *> { typedef T value; };
642 #define hb_remove_pointer(T) hb_remove_pointer<T>::value
643
644
645 /* Headers we include for everyone. Keep topologically sorted by dependency.
646 * They express dependency amongst themselves, but no other file should include
647 * them directly.*/
648 #include "hb-atomic.hh"
649 #include "hb-mutex.hh"
650 #include "hb-null.hh"
651 #include "hb-dsalgs.hh" // Requires: hb-null
652 #include "hb-iter.hh" // Requires: hb-null
653 #include "hb-debug.hh" // Requires: hb-atomic hb-dsalgs
654 #include "hb-array.hh" // Requires: hb-dsalgs hb-iter hb-null
655 #include "hb-vector.hh" // Requires: hb-array hb-null
656 #include "hb-object.hh" // Requires: hb-atomic hb-mutex hb-vector
657
658 #endif /* HB_HH */
659