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
33#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC
34#ifdef _MSC_VER
35#pragma warning( disable: 4068 ) /* Unknown pragma */
36#endif
37#if defined(__GNUC__) || defined(__clang__)
38/* Rules:
39 *
40 * - All pragmas are declared GCC even if they are clang ones. Otherwise GCC
41 * nags, even though we instruct it to ignore -Wunknown-pragmas. ¯\_(ツ)_/¯
42 *
43 * - Within each category, keep sorted.
44 *
45 * - Warnings whose scope can be expanded in future compiler versions shall
46 * be declared as "warning". Otherwise, either ignored or error.
47 */
48
49/* Setup. Don't sort order within this category. */
50#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
51#pragma GCC diagnostic warning "-Wall"
52#pragma GCC diagnostic warning "-Wextra"
53#endif
54#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
55#pragma GCC diagnostic ignored "-Wpragmas"
56#pragma GCC diagnostic ignored "-Wunknown-pragmas"
57#pragma GCC diagnostic ignored "-Wunknown-warning-option"
58#endif
59#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
60//#pragma GCC diagnostic warning "-Weverything"
61#endif
62
63/* Error. Should never happen. */
64#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_ERROR
65#pragma GCC diagnostic error "-Wc++11-narrowing"
66#pragma GCC diagnostic error "-Wcast-align"
67#pragma GCC diagnostic error "-Wcast-function-type"
68#pragma GCC diagnostic error "-Wdelete-non-virtual-dtor"
69#pragma GCC diagnostic error "-Wembedded-directive"
70#pragma GCC diagnostic error "-Wextra-semi-stmt"
71#pragma GCC diagnostic error "-Wformat-security"
72#pragma GCC diagnostic error "-Wimplicit-function-declaration"
73#pragma GCC diagnostic error "-Winit-self"
74#pragma GCC diagnostic error "-Winjected-class-name"
75#pragma GCC diagnostic error "-Wmissing-braces"
76#pragma GCC diagnostic error "-Wmissing-declarations"
77#pragma GCC diagnostic error "-Wmissing-prototypes"
78#pragma GCC diagnostic error "-Wnested-externs"
79#pragma GCC diagnostic error "-Wold-style-definition"
80#pragma GCC diagnostic error "-Wpointer-arith"
81#pragma GCC diagnostic error "-Wredundant-decls"
82#pragma GCC diagnostic error "-Wreorder"
83#pragma GCC diagnostic error "-Wsign-compare"
84#pragma GCC diagnostic error "-Wstrict-prototypes"
85#pragma GCC diagnostic error "-Wstring-conversion"
86#pragma GCC diagnostic error "-Wswitch-enum"
87#pragma GCC diagnostic error "-Wtautological-overlap-compare"
88#pragma GCC diagnostic error "-Wunneeded-internal-declaration"
89#pragma GCC diagnostic error "-Wunused"
90#pragma GCC diagnostic error "-Wunused-local-typedefs"
91#pragma GCC diagnostic error "-Wunused-value"
92#pragma GCC diagnostic error "-Wunused-variable"
93#pragma GCC diagnostic error "-Wvla"
94#pragma GCC diagnostic error "-Wwrite-strings"
95#endif
96
97/* Warning. To be investigated if happens. */
98#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
99#pragma GCC diagnostic warning "-Wbuiltin-macro-redefined"
100#pragma GCC diagnostic warning "-Wdeprecated"
101#pragma GCC diagnostic warning "-Wdeprecated-declarations"
102#pragma GCC diagnostic warning "-Wdisabled-optimization"
103#pragma GCC diagnostic warning "-Wdouble-promotion"
104#pragma GCC diagnostic warning "-Wformat=2"
105#pragma GCC diagnostic warning "-Wignored-pragma-optimize"
106#pragma GCC diagnostic warning "-Wlogical-op"
107#pragma GCC diagnostic warning "-Wmaybe-uninitialized"
108#pragma GCC diagnostic warning "-Wmissing-format-attribute"
109#pragma GCC diagnostic warning "-Wundef"
110#endif
111
112/* Ignored currently, but should be fixed at some point. */
113#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
114#pragma GCC diagnostic ignored "-Wconversion" // TODO fix
115#pragma GCC diagnostic ignored "-Wformat-signedness" // TODO fix
116#pragma GCC diagnostic ignored "-Wshadow" // TODO fix
117#pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations" // TODO fix
118#pragma GCC diagnostic ignored "-Wunused-parameter" // TODO fix
119#endif
120
121/* Ignored intentionally. */
122#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
123#pragma GCC diagnostic ignored "-Wclass-memaccess"
124#pragma GCC diagnostic ignored "-Wformat-nonliteral"
125#pragma GCC diagnostic ignored "-Wformat-zero-length"
126#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
127#pragma GCC diagnostic ignored "-Wpacked" // Erratic impl in clang
128#pragma GCC diagnostic ignored "-Wstrict-aliasing"
129#pragma GCC diagnostic ignored "-Wtype-limits"
130#pragma GCC diagnostic ignored "-Wc++11-compat" // only gcc raises it
131#endif
132
133#endif
134#endif
135
136
137#include "hb-config.hh"
138
139
140/*
141 * Following added based on what AC_USE_SYSTEM_EXTENSIONS adds to
142 * config.h.in. Copied here for the convenience of those embedding
143 * HarfBuzz and not using our build system.
144 */
145/* Enable extensions on AIX 3, Interix. */
146#ifndef _ALL_SOURCE
147# define _ALL_SOURCE 1
148#endif
149/* Enable GNU extensions on systems that have them. */
150#ifndef _GNU_SOURCE
151# define _GNU_SOURCE 1
152#endif
153/* Enable threading extensions on Solaris. */
154#ifndef _POSIX_PTHREAD_SEMANTICS
155# define _POSIX_PTHREAD_SEMANTICS 1
156#endif
157/* Enable extensions on HP NonStop. */
158#ifndef _TANDEM_SOURCE
159# define _TANDEM_SOURCE 1
160#endif
161/* Enable general extensions on Solaris. */
162#ifndef __EXTENSIONS__
163# define __EXTENSIONS__ 1
164#endif
165
166#if defined (_MSC_VER) && defined (HB_DLL_EXPORT)
167#define HB_EXTERN __declspec (dllexport) extern
168#endif
169
170#include "hb.h"
171#define HB_H_IN
172#include "hb-ot.h"
173#define HB_OT_H_IN
174#include "hb-aat.h"
175#define HB_AAT_H_IN
176
177#include <limits.h>
178#include <math.h>
179#include <float.h>
180#include <stdlib.h>
181#include <stddef.h>
182#include <string.h>
183#include <assert.h>
184#include <stdio.h>
185#include <stdarg.h>
186
187#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
188#ifdef __MINGW32_VERSION
189#ifndef WIN32_LEAN_AND_MEAN
190#define WIN32_LEAN_AND_MEAN 1
191#endif
192#else
193#include <intrin.h>
194#endif
195#endif
196
197#ifdef _WIN32
198#include <windows.h>
199#include <winapifamily.h>
200#endif
201
202#define HB_PASTE1(a,b) a##b
203#define HB_PASTE(a,b) HB_PASTE1(a,b)
204
205
206/* Compile-time custom allocator support. */
207
208#if !defined(HB_CUSTOM_MALLOC) \
209 && defined(hb_malloc_impl) \
210 && defined(hb_calloc_impl) \
211 && defined(hb_realloc_impl) \
212 && defined(hb_free_impl)
213#define HB_CUSTOM_MALLOC
214#endif
215
216#ifdef HB_CUSTOM_MALLOC
217extern "C" void* hb_malloc_impl(size_t size);
218extern "C" void* hb_calloc_impl(size_t nmemb, size_t size);
219extern "C" void* hb_realloc_impl(void *ptr, size_t size);
220extern "C" void hb_free_impl(void *ptr);
221#define malloc hb_malloc_impl
222#define calloc hb_calloc_impl
223#define realloc hb_realloc_impl
224#define free hb_free_impl
225#endif
226
227
228/*
229 * Compiler attributes
230 */
231
232#if (defined(__GNUC__) || defined(__clang__)) && defined(__OPTIMIZE__)
233#define likely(expr) (__builtin_expect (!!(expr), 1))
234#define unlikely(expr) (__builtin_expect (!!(expr), 0))
235#else
236#define likely(expr) (expr)
237#define unlikely(expr) (expr)
238#endif
239
240#if !defined(__GNUC__) && !defined(__clang__)
241#undef __attribute__
242#define __attribute__(x)
243#endif
244
245#if defined(__GNUC__) && (__GNUC__ >= 3)
246#define HB_PURE_FUNC __attribute__((pure))
247#define HB_CONST_FUNC __attribute__((const))
248#define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
249#else
250#define HB_PURE_FUNC
251#define HB_CONST_FUNC
252#define HB_PRINTF_FUNC(format_idx, arg_idx)
253#endif
254#if defined(__GNUC__) && (__GNUC__ >= 4) || (__clang__)
255#define HB_UNUSED __attribute__((unused))
256#elif defined(_MSC_VER) /* https://github.com/harfbuzz/harfbuzz/issues/635 */
257#define HB_UNUSED __pragma(warning(suppress: 4100 4101))
258#else
259#define HB_UNUSED
260#endif
261
262#ifndef HB_INTERNAL
263# if !defined(HB_NO_VISIBILITY) && !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(_MSC_VER) && !defined(__SUNPRO_CC)
264# define HB_INTERNAL __attribute__((__visibility__("hidden")))
265# elif defined(__MINGW32__)
266 /* We use -export-symbols on mingw32, since it does not support visibility attributes. */
267# define HB_INTERNAL
268# elif defined (_MSC_VER) && defined (HB_DLL_EXPORT)
269 /* We do not try to export internal symbols on Visual Studio */
270# define HB_INTERNAL
271#else
272# define HB_INTERNAL
273# define HB_NO_VISIBILITY 1
274# endif
275#endif
276
277/* https://github.com/harfbuzz/harfbuzz/issues/1651 */
278#if defined(__clang__) && __clang_major__ < 10
279#define static_const static
280#else
281#define static_const static const
282#endif
283
284#if defined(__GNUC__) && (__GNUC__ >= 3)
285#define HB_FUNC __PRETTY_FUNCTION__
286#elif defined(_MSC_VER)
287#define HB_FUNC __FUNCSIG__
288#else
289#define HB_FUNC __func__
290#endif
291
292#if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5140)
293/* https://github.com/harfbuzz/harfbuzz/issues/630 */
294#define __restrict
295#endif
296
297/*
298 * Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
299 * HB_FALLTHROUGH is an annotation to suppress compiler warnings about switch
300 * cases that fall through without a break or return statement. HB_FALLTHROUGH
301 * is only needed on cases that have code:
302 *
303 * switch (foo) {
304 * case 1: // These cases have no code. No fallthrough annotations are needed.
305 * case 2:
306 * case 3:
307 * foo = 4; // This case has code, so a fallthrough annotation is needed:
308 * HB_FALLTHROUGH;
309 * default:
310 * return foo;
311 * }
312 */
313#if defined(__clang__) && __cplusplus >= 201103L
314 /* clang's fallthrough annotations are only available starting in C++11. */
315# define HB_FALLTHROUGH [[clang::fallthrough]]
316#elif defined(__GNUC__) && (__GNUC__ >= 7)
317 /* GNU fallthrough attribute is available from GCC7 */
318# define HB_FALLTHROUGH __attribute__((fallthrough))
319#elif defined(_MSC_VER)
320 /*
321 * MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):
322 * https://msdn.microsoft.com/en-us/library/ms235402%28VS.80%29.aspx
323 */
324# include <sal.h>
325# define HB_FALLTHROUGH __fallthrough
326#else
327# define HB_FALLTHROUGH /* FALLTHROUGH */
328#endif
329
330/* A tag to enforce use of return value for a function */
331#if __cplusplus >= 201703L
332# define HB_NODISCARD [[nodiscard]]
333#elif defined(__GNUC__) || defined(__clang__)
334# define HB_NODISCARD __attribute__((warn_unused_result))
335#elif defined(_MSC_VER)
336# define HB_NODISCARD _Check_return_
337#else
338# define HB_NODISCARD
339#endif
340#define hb_success_t HB_NODISCARD bool
341
342/* https://github.com/harfbuzz/harfbuzz/issues/1852 */
343#if defined(__clang__) && !(defined(_AIX) && (defined(__IBMCPP__) || defined(__ibmxl__)))
344/* Disable certain sanitizer errors. */
345/* https://github.com/harfbuzz/harfbuzz/issues/1247 */
346#define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW __attribute__((no_sanitize("signed-integer-overflow")))
347#else
348#define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW
349#endif
350
351
352#ifdef _WIN32
353 /* We need Windows Vista for both Uniscribe backend and for
354 * MemoryBarrier. We don't support compiling on Windows XP,
355 * though we run on it fine. */
356# if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
357# undef _WIN32_WINNT
358# endif
359# ifndef _WIN32_WINNT
360# if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
361# define _WIN32_WINNT 0x0600
362# endif
363# endif
364# ifndef WIN32_LEAN_AND_MEAN
365# define WIN32_LEAN_AND_MEAN 1
366# endif
367# ifndef STRICT
368# define STRICT 1
369# endif
370
371# if defined(_WIN32_WCE)
372 /* Some things not defined on Windows CE. */
373# define vsnprintf _vsnprintf
374# ifndef HB_NO_GETENV
375# define HB_NO_GETENV
376# endif
377# if _WIN32_WCE < 0x800
378# define HB_NO_SETLOCALE
379# define HB_NO_ERRNO
380# endif
381# elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
382# ifndef HB_NO_GETENV
383# define HB_NO_GETENV
384# endif
385# endif
386# if defined(_MSC_VER) && _MSC_VER < 1900
387# define snprintf _snprintf
388# endif
389#endif
390
391#ifdef HB_NO_GETENV
392#define getenv(Name) nullptr
393#endif
394
395#ifndef HB_NO_ERRNO
396# include <errno.h>
397#else
398static int HB_UNUSED _hb_errno = 0;
399# undef errno
400# define errno _hb_errno
401#endif
402
403#if defined(HAVE_ATEXIT) && !defined(HB_USE_ATEXIT)
404/* atexit() is only safe to be called from shared libraries on certain
405 * platforms. Whitelist.
406 * https://bugs.freedesktop.org/show_bug.cgi?id=82246 */
407# if defined(__linux) && defined(__GLIBC_PREREQ)
408# if __GLIBC_PREREQ(2,3)
409/* From atexit() manpage, it's safe with glibc 2.2.3 on Linux. */
410# define HB_USE_ATEXIT 1
411# endif
412# elif defined(_MSC_VER) || defined(__MINGW32__)
413/* For MSVC:
414 * https://msdn.microsoft.com/en-us/library/tze57ck3.aspx
415 * https://msdn.microsoft.com/en-us/library/zk17ww08.aspx
416 * mingw32 headers say atexit is safe to use in shared libraries.
417 */
418# define HB_USE_ATEXIT 1
419# elif defined(__ANDROID__)
420/* This is available since Android NKD r8 or r8b:
421 * https://issuetracker.google.com/code/p/android/issues/detail?id=6455
422 */
423# define HB_USE_ATEXIT 1
424# elif defined(__APPLE__)
425/* For macOS and related platforms, the atexit man page indicates
426 * that it will be invoked when the library is unloaded, not only
427 * at application exit.
428 */
429# define HB_USE_ATEXIT 1
430# endif
431#endif
432#ifdef HB_NO_ATEXIT
433# undef HB_USE_ATEXIT
434#endif
435#ifndef HB_USE_ATEXIT
436# define HB_USE_ATEXIT 0
437#endif
438
439#define HB_STMT_START do
440#define HB_STMT_END while (0)
441
442/* Static-assert as expression. */
443template <unsigned int cond> class hb_assert_constant_t;
444template <> class hb_assert_constant_t<1> {};
445#define ASSERT_STATIC_EXPR_ZERO(_cond) (0 * (unsigned int) sizeof (hb_assert_constant_t<_cond>))
446
447/* Lets assert int types. Saves trouble down the road. */
448static_assert ((sizeof (int8_t) == 1), "");
449static_assert ((sizeof (uint8_t) == 1), "");
450static_assert ((sizeof (int16_t) == 2), "");
451static_assert ((sizeof (uint16_t) == 2), "");
452static_assert ((sizeof (int32_t) == 4), "");
453static_assert ((sizeof (uint32_t) == 4), "");
454static_assert ((sizeof (int64_t) == 8), "");
455static_assert ((sizeof (uint64_t) == 8), "");
456static_assert ((sizeof (hb_codepoint_t) == 4), "");
457static_assert ((sizeof (hb_position_t) == 4), "");
458static_assert ((sizeof (hb_mask_t) == 4), "");
459static_assert ((sizeof (hb_var_int_t) == 4), "");
460
461#define HB_DELETE_COPY_ASSIGN(TypeName) \
462 TypeName(const TypeName&) = delete; \
463 void operator=(const TypeName&) = delete
464#define HB_DELETE_CREATE_COPY_ASSIGN(TypeName) \
465 TypeName() = delete; \
466 TypeName(const TypeName&) = delete; \
467 void operator=(const TypeName&) = delete
468
469
470/* Flags */
471
472/* Enable bitwise ops on enums marked as flags_t */
473/* To my surprise, looks like the function resolver is happy to silently cast
474 * one enum to another... So this doesn't provide the type-checking that I
475 * originally had in mind... :(.
476 *
477 * For MSVC warnings, see: https://github.com/harfbuzz/harfbuzz/pull/163
478 */
479#ifdef _MSC_VER
480# pragma warning(disable:4200)
481# pragma warning(disable:4800)
482#endif
483#define HB_MARK_AS_FLAG_T(T) \
484 extern "C++" { \
485 static inline T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
486 static inline T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
487 static inline T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
488 static inline T operator ~ (T r) { return T (~(unsigned int) r); } \
489 static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
490 static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
491 static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
492 } \
493 static_assert (true, "")
494
495/* Useful for set-operations on small enums.
496 * For example, for testing "x ∈ {x1, x2, x3}" use:
497 * (FLAG_UNSAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
498 */
499#define FLAG(x) (ASSERT_STATIC_EXPR_ZERO ((unsigned)(x) < 32) + (((uint32_t) 1U) << (unsigned)(x)))
500#define FLAG_UNSAFE(x) ((unsigned)(x) < 32 ? (((uint32_t) 1U) << (unsigned)(x)) : 0)
501#define FLAG_RANGE(x,y) (ASSERT_STATIC_EXPR_ZERO ((x) < (y)) + FLAG(y+1) - FLAG(x))
502#define FLAG64(x) (ASSERT_STATIC_EXPR_ZERO ((unsigned)(x) < 64) + (((uint64_t) 1ULL) << (unsigned)(x)))
503#define FLAG64_UNSAFE(x) ((unsigned)(x) < 64 ? (((uint64_t) 1ULL) << (unsigned)(x)) : 0)
504
505
506/* Size signifying variable-sized array */
507#ifndef HB_VAR_ARRAY
508#define HB_VAR_ARRAY 1
509#endif
510
511static inline float
512_hb_roundf (float x) { return floorf (x + .5f); }
513#define roundf(x) _hb_roundf(x)
514
515/* Endian swap, used in Windows related backends */
516static inline uint16_t hb_uint16_swap (const uint16_t v)
517{ return (v >> 8) | (v << 8); }
518static inline uint32_t hb_uint32_swap (const uint32_t v)
519{ return (hb_uint16_swap (v) << 16) | hb_uint16_swap (v >> 16); }
520
521/*
522 * Big-endian integers. Here because fundamental.
523 */
524
525template <typename Type, int Bytes> struct BEInt;
526
527template <typename Type>
528struct BEInt<Type, 1>
529{
530 public:
531 BEInt<Type, 1>& operator = (Type V)
532 {
533 v = V;
534 return *this;
535 }
536 operator Type () const { return v; }
537 private: uint8_t v;
538};
539template <typename Type>
540struct BEInt<Type, 2>
541{
542 public:
543 BEInt<Type, 2>& operator = (Type V)
544 {
545 v[0] = (V >> 8) & 0xFF;
546 v[1] = (V ) & 0xFF;
547 return *this;
548 }
549 operator Type () const
550 {
551#if ((defined(__GNUC__) && __GNUC__ >= 5) || defined(__clang__)) && \
552 defined(__BYTE_ORDER) && \
553 (__BYTE_ORDER == __LITTLE_ENDIAN || __BYTE_ORDER == __BIG_ENDIAN)
554 /* Spoon-feed the compiler a big-endian integer with alignment 1.
555 * https://github.com/harfbuzz/harfbuzz/pull/1398 */
556 struct __attribute__((packed)) packed_uint16_t { uint16_t v; };
557#if __BYTE_ORDER == __LITTLE_ENDIAN
558 return __builtin_bswap16 (((packed_uint16_t *) this)->v);
559#else /* __BYTE_ORDER == __BIG_ENDIAN */
560 return ((packed_uint16_t *) this)->v;
561#endif
562#endif
563 return (v[0] << 8)
564 + (v[1] );
565 }
566 private: uint8_t v[2];
567};
568template <typename Type>
569struct BEInt<Type, 3>
570{
571 public:
572 BEInt<Type, 3>& operator = (Type V)
573 {
574 v[0] = (V >> 16) & 0xFF;
575 v[1] = (V >> 8) & 0xFF;
576 v[2] = (V ) & 0xFF;
577 return *this;
578 }
579 operator Type () const
580 {
581 return (v[0] << 16)
582 + (v[1] << 8)
583 + (v[2] );
584 }
585 private: uint8_t v[3];
586};
587template <typename Type>
588struct BEInt<Type, 4>
589{
590 public:
591 BEInt<Type, 4>& operator = (Type V)
592 {
593 v[0] = (V >> 24) & 0xFF;
594 v[1] = (V >> 16) & 0xFF;
595 v[2] = (V >> 8) & 0xFF;
596 v[3] = (V ) & 0xFF;
597 return *this;
598 }
599 operator Type () const
600 {
601 return (v[0] << 24)
602 + (v[1] << 16)
603 + (v[2] << 8)
604 + (v[3] );
605 }
606 private: uint8_t v[4];
607};
608
609
610/*
611 * For lack of a better place, put Zawgyi script hack here.
612 * https://github.com/harfbuzz/harfbuzz/issues/1162
613 */
614
615#define HB_SCRIPT_MYANMAR_ZAWGYI ((hb_script_t) HB_TAG ('Q','a','a','g'))
616
617
618/* Headers we include for everyone. Keep topologically sorted by dependency.
619 * They express dependency amongst themselves, but no other file should include
620 * them directly.*/
621#include "hb-meta.hh"
622#include "hb-mutex.hh"
623#include "hb-number.hh"
624#include "hb-atomic.hh" // Requires: hb-meta
625#include "hb-null.hh" // Requires: hb-meta
626#include "hb-algs.hh" // Requires: hb-meta hb-null hb-number
627#include "hb-iter.hh" // Requires: hb-algs hb-meta
628#include "hb-debug.hh" // Requires: hb-algs hb-atomic
629#include "hb-array.hh" // Requires: hb-algs hb-iter hb-null
630#include "hb-vector.hh" // Requires: hb-array hb-null
631#include "hb-object.hh" // Requires: hb-atomic hb-mutex hb-vector
632
633#endif /* HB_HH */
634