489 lines
16 KiB
C++
489 lines
16 KiB
C++
/*
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* Copyright © 2007,2008,2009 Red Hat, Inc.
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* Copyright © 2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_HH
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#define HB_HH
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC
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#ifdef _MSC_VER
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#pragma warning( disable: 4068 ) /* Unknown pragma */
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#endif
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#if defined(__GNUC__) || defined(__clang__)
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/* Rules:
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*
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* - All pragmas are declared GCC even if they are clang ones. Otherwise GCC
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* nags, even though we instruct it to ignore -Wunknown-pragmas. ¯\_(ツ)_/¯
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*
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* - Within each category, keep sorted.
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*
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* - Warnings whose scope can be expanded in future compiler versions shall
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* be declared as "warning". Otherwise, either ignored or error.
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*/
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/* Setup. Don't sort order within this category. */
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
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#pragma GCC diagnostic warning "-Wall"
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#pragma GCC diagnostic warning "-Wextra"
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#endif
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
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#pragma GCC diagnostic ignored "-Wpragmas"
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#pragma GCC diagnostic ignored "-Wunknown-pragmas"
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#pragma GCC diagnostic ignored "-Wunknown-warning-option"
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#endif
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
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//#pragma GCC diagnostic warning "-Weverything"
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#endif
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/* Error. Should never happen. */
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_ERROR
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#pragma GCC diagnostic error "-Wbitwise-instead-of-logical"
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#pragma GCC diagnostic error "-Wcast-align"
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#pragma GCC diagnostic error "-Wcast-function-type"
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#pragma GCC diagnostic error "-Wcomma"
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#pragma GCC diagnostic error "-Wdelete-non-virtual-dtor"
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#pragma GCC diagnostic error "-Wembedded-directive"
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#pragma GCC diagnostic error "-Wextra-semi-stmt"
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#pragma GCC diagnostic error "-Wformat-security"
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#pragma GCC diagnostic error "-Wimplicit-function-declaration"
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#pragma GCC diagnostic error "-Winit-self"
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#pragma GCC diagnostic error "-Winjected-class-name"
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#pragma GCC diagnostic error "-Wmissing-braces"
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#pragma GCC diagnostic error "-Wmissing-declarations"
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#pragma GCC diagnostic error "-Wmissing-prototypes"
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#pragma GCC diagnostic error "-Wnarrowing"
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#pragma GCC diagnostic error "-Wnested-externs"
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#pragma GCC diagnostic error "-Wold-style-definition"
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#pragma GCC diagnostic error "-Wpointer-arith"
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#pragma GCC diagnostic error "-Wredundant-decls"
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#pragma GCC diagnostic error "-Wreorder"
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#pragma GCC diagnostic error "-Wsign-compare"
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#pragma GCC diagnostic error "-Wstrict-prototypes"
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#pragma GCC diagnostic error "-Wstring-conversion"
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#pragma GCC diagnostic error "-Wswitch-enum"
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#pragma GCC diagnostic error "-Wtautological-overlap-compare"
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#pragma GCC diagnostic error "-Wunneeded-internal-declaration"
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#pragma GCC diagnostic error "-Wunused"
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#pragma GCC diagnostic error "-Wunused-local-typedefs"
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#pragma GCC diagnostic error "-Wunused-value"
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#pragma GCC diagnostic error "-Wunused-variable"
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#pragma GCC diagnostic error "-Wvla"
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#pragma GCC diagnostic error "-Wwrite-strings"
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#endif
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/* Warning. To be investigated if happens. */
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_WARNING
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#pragma GCC diagnostic warning "-Wbuiltin-macro-redefined"
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#pragma GCC diagnostic warning "-Wdeprecated"
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#pragma GCC diagnostic warning "-Wdeprecated-declarations"
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#pragma GCC diagnostic warning "-Wdisabled-optimization"
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#pragma GCC diagnostic warning "-Wdouble-promotion"
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#pragma GCC diagnostic warning "-Wformat=2"
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#pragma GCC diagnostic warning "-Wignored-pragma-optimize"
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#pragma GCC diagnostic warning "-Wlogical-op"
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#pragma GCC diagnostic warning "-Wmaybe-uninitialized"
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#pragma GCC diagnostic warning "-Wmissing-format-attribute"
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#pragma GCC diagnostic warning "-Wundef"
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#pragma GCC diagnostic warning "-Wunused-but-set-variable"
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#endif
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/* Ignored currently, but should be fixed at some point. */
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
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#pragma GCC diagnostic ignored "-Wconversion" // TODO fix
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#pragma GCC diagnostic ignored "-Wformat-signedness" // TODO fix
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#pragma GCC diagnostic ignored "-Wshadow" // TODO fix
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#pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations" // TODO fix
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#pragma GCC diagnostic ignored "-Wunused-parameter" // TODO fix
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic ignored "-Wunused-result" // TODO fix
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#endif
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#endif
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/* Ignored intentionally. */
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#ifndef HB_NO_PRAGMA_GCC_DIAGNOSTIC_IGNORED
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#pragma GCC diagnostic ignored "-Wclass-memaccess"
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#pragma GCC diagnostic ignored "-Wcast-function-type-strict" // https://github.com/harfbuzz/harfbuzz/pull/3859#issuecomment-1295409126
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#pragma GCC diagnostic ignored "-Wformat-nonliteral"
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#pragma GCC diagnostic ignored "-Wformat-zero-length"
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#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
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#pragma GCC diagnostic ignored "-Wpacked" // Erratic impl in clang
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#pragma GCC diagnostic ignored "-Wrange-loop-analysis" // https://github.com/harfbuzz/harfbuzz/issues/2834
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#pragma GCC diagnostic ignored "-Wstrict-aliasing"
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#pragma GCC diagnostic ignored "-Wtype-limits"
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#pragma GCC diagnostic ignored "-Wc++11-compat" // only gcc raises it
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#endif
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#endif
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#endif
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#include "hb-config.hh"
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#include "hb-limits.hh"
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/*
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* Following added based on what AC_USE_SYSTEM_EXTENSIONS adds to
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* config.h.in. Copied here for the convenience of those embedding
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* HarfBuzz and not using our build system.
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*/
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/* Enable extensions on AIX 3, Interix. */
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#ifndef _ALL_SOURCE
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# define _ALL_SOURCE 1
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#endif
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/* Enable GNU extensions on systems that have them. */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE 1
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#endif
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/* Enable threading extensions on Solaris. */
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#ifndef _POSIX_PTHREAD_SEMANTICS
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# define _POSIX_PTHREAD_SEMANTICS 1
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#endif
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/* Enable extensions on HP NonStop. */
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#ifndef _TANDEM_SOURCE
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# define _TANDEM_SOURCE 1
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#endif
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/* Enable general extensions on Solaris. */
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#ifndef __EXTENSIONS__
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# define __EXTENSIONS__ 1
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#endif
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#if defined (_MSC_VER) && defined (HB_DLL_EXPORT)
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#define HB_EXTERN __declspec (dllexport) extern
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#endif
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#include "hb.h"
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#define HB_H_IN
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#include "hb-ot.h"
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#define HB_OT_H_IN
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#include "hb-aat.h"
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#define HB_AAT_H_IN
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#include <cassert>
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#include <cfloat>
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#include <climits>
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#if defined(_MSC_VER) && !defined(_USE_MATH_DEFINES)
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# define _USE_MATH_DEFINES
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#endif
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#include <cmath>
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#include <cstdarg>
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#include <cstddef>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#if (defined(_MSC_VER) && _MSC_VER >= 1500) || defined(__MINGW32__)
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#ifdef __MINGW32_VERSION
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN 1
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#endif
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#else
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#include <intrin.h>
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#endif
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#endif
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#ifdef _WIN32
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#include <windows.h>
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#include <winapifamily.h>
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#endif
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#define HB_PASTE1(a,b) a##b
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#define HB_PASTE(a,b) HB_PASTE1(a,b)
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/* Compile-time custom allocator support. */
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#if !defined(HB_CUSTOM_MALLOC) \
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&& defined(hb_malloc_impl) \
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&& defined(hb_calloc_impl) \
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&& defined(hb_realloc_impl) \
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&& defined(hb_free_impl)
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#define HB_CUSTOM_MALLOC
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#endif
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#ifdef HB_CUSTOM_MALLOC
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extern "C" void* hb_malloc_impl(size_t size);
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extern "C" void* hb_calloc_impl(size_t nmemb, size_t size);
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extern "C" void* hb_realloc_impl(void *ptr, size_t size);
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extern "C" void hb_free_impl(void *ptr);
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#define hb_malloc hb_malloc_impl
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#define hb_calloc hb_calloc_impl
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#define hb_realloc hb_realloc_impl
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#define hb_free hb_free_impl
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#else
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#define hb_malloc malloc
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#define hb_calloc calloc
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#define hb_realloc realloc
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#define hb_free free
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#endif
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/*
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* Compiler attributes
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*/
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#if (defined(__GNUC__) || defined(__clang__)) && defined(__OPTIMIZE__)
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#define likely(expr) (__builtin_expect (!!(expr), 1))
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#define unlikely(expr) (__builtin_expect (!!(expr), 0))
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#else
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#define likely(expr) (expr)
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#define unlikely(expr) (expr)
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#endif
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#if !defined(__GNUC__) && !defined(__clang__)
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#undef __attribute__
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#define __attribute__(x)
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#endif
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#if defined(__GNUC__) && (__GNUC__ >= 3)
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#define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
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#else
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#define HB_PRINTF_FUNC(format_idx, arg_idx)
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#endif
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#if defined(__GNUC__) && (__GNUC__ >= 4) || (__clang__)
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#define HB_UNUSED __attribute__((unused))
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#elif defined(_MSC_VER) /* https://github.com/harfbuzz/harfbuzz/issues/635 */
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#define HB_UNUSED __pragma(warning(suppress: 4100 4101))
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#else
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#define HB_UNUSED
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#endif
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#ifndef HB_INTERNAL
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# if !defined(HB_NO_VISIBILITY) && !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(_MSC_VER) && !defined(__SUNPRO_CC)
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# define HB_INTERNAL __attribute__((__visibility__("hidden")))
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# elif defined(__MINGW32__)
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/* We use -export-symbols on mingw32, since it does not support visibility attributes. */
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# define HB_INTERNAL
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# elif defined (_MSC_VER) && defined (HB_DLL_EXPORT)
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/* We do not try to export internal symbols on Visual Studio */
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# define HB_INTERNAL
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#else
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# define HB_INTERNAL
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# define HB_NO_VISIBILITY 1
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# endif
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#endif
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/* https://github.com/harfbuzz/harfbuzz/issues/1651 */
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#if defined(__clang__) && __clang_major__ < 10
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#define static_const static
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#else
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#define static_const static const
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#endif
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#if defined(__GNUC__) && (__GNUC__ >= 3)
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#define HB_FUNC __PRETTY_FUNCTION__
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#elif defined(_MSC_VER)
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#define HB_FUNC __FUNCSIG__
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#else
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#define HB_FUNC __func__
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#endif
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#if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5140)
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/* https://github.com/harfbuzz/harfbuzz/issues/630 */
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#define __restrict
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#endif
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/*
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* Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
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* HB_FALLTHROUGH is an annotation to suppress compiler warnings about switch
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* cases that fall through without a break or return statement. HB_FALLTHROUGH
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* is only needed on cases that have code:
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*
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* switch (foo) {
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* case 1: // These cases have no code. No fallthrough annotations are needed.
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* case 2:
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* case 3:
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* foo = 4; // This case has code, so a fallthrough annotation is needed:
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* HB_FALLTHROUGH;
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* default:
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* return foo;
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* }
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*/
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#if defined(__clang__) && __cplusplus >= 201103L
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/* clang's fallthrough annotations are only available starting in C++11. */
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# define HB_FALLTHROUGH [[clang::fallthrough]]
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#elif defined(__GNUC__) && (__GNUC__ >= 7)
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/* GNU fallthrough attribute is available from GCC7 */
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# define HB_FALLTHROUGH __attribute__((fallthrough))
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#elif defined(_MSC_VER)
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/*
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* MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):
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* https://msdn.microsoft.com/en-us/library/ms235402%28VS.80%29.aspx
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*/
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# include <sal.h>
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# define HB_FALLTHROUGH __fallthrough
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#else
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# define HB_FALLTHROUGH /* FALLTHROUGH */
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#endif
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/* A tag to enforce use of return value for a function */
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#if __cplusplus >= 201703L
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# define HB_NODISCARD [[nodiscard]]
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#elif defined(__GNUC__) || defined(__clang__)
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# define HB_NODISCARD __attribute__((warn_unused_result))
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#elif defined(_MSC_VER)
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# define HB_NODISCARD _Check_return_
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#else
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# define HB_NODISCARD
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#endif
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/* https://github.com/harfbuzz/harfbuzz/issues/1852 */
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#if defined(__clang__) && !(defined(_AIX) && (defined(__IBMCPP__) || defined(__ibmxl__)))
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/* Disable certain sanitizer errors. */
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/* https://github.com/harfbuzz/harfbuzz/issues/1247 */
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#define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW __attribute__((no_sanitize("signed-integer-overflow")))
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#else
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#define HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW
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#endif
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#ifdef _WIN32
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/* We need Windows Vista for both Uniscribe backend and for
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* MemoryBarrier. We don't support compiling on Windows XP,
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* though we run on it fine. */
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# if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
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# undef _WIN32_WINNT
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# endif
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# ifndef _WIN32_WINNT
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# if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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# define _WIN32_WINNT 0x0600
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# endif
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# endif
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# ifndef WIN32_LEAN_AND_MEAN
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# define WIN32_LEAN_AND_MEAN 1
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# endif
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# ifndef STRICT
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# define STRICT 1
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# endif
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# if defined(_WIN32_WCE)
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/* Some things not defined on Windows CE. */
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# define vsnprintf _vsnprintf
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# ifndef HB_NO_GETENV
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# define HB_NO_GETENV
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# endif
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# if _WIN32_WCE < 0x800
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# define HB_NO_SETLOCALE
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# define HB_NO_ERRNO
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# endif
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# elif !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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# ifndef HB_NO_GETENV
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# define HB_NO_GETENV
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# endif
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# endif
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# if defined(_MSC_VER) && _MSC_VER < 1900
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# define snprintf _snprintf
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# endif
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#endif
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#ifdef HB_NO_GETENV
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#define getenv(Name) nullptr
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#endif
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#ifndef HB_NO_ERRNO
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# include <cerrno>
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#else
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static int HB_UNUSED _hb_errno = 0;
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# undef errno
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# define errno _hb_errno
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#endif
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#define HB_STMT_START do
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#define HB_STMT_END while (0)
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#if defined(HAVE_ATEXIT) && !defined(HB_USE_ATEXIT)
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/* atexit() is only safe to be called from shared libraries on certain
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* platforms. Whitelist.
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* https://bugs.freedesktop.org/show_bug.cgi?id=82246 */
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# if defined(__linux) && defined(__GLIBC_PREREQ)
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# if __GLIBC_PREREQ(2,3)
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/* From atexit() manpage, it's safe with glibc 2.2.3 on Linux. */
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# define HB_USE_ATEXIT 1
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# endif
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# elif defined(_MSC_VER) || defined(__MINGW32__)
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/* For MSVC:
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* https://msdn.microsoft.com/en-us/library/tze57ck3.aspx
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* https://msdn.microsoft.com/en-us/library/zk17ww08.aspx
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* mingw32 headers say atexit is safe to use in shared libraries.
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*/
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# define HB_USE_ATEXIT 1
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# elif defined(__ANDROID__)
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/* This is available since Android NKD r8 or r8b:
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* https://issuetracker.google.com/code/p/android/issues/detail?id=6455
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*/
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# define HB_USE_ATEXIT 1
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# elif defined(__APPLE__)
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/* For macOS and related platforms, the atexit man page indicates
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* that it will be invoked when the library is unloaded, not only
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* at application exit.
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*/
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# define HB_USE_ATEXIT 1
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# endif
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#endif /* defined(HAVE_ATEXIT) && !defined(HB_USE_ATEXIT) */
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#ifdef HB_NO_ATEXIT
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# undef HB_USE_ATEXIT
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#endif
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#ifndef HB_USE_ATEXIT
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# define HB_USE_ATEXIT 0
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#endif
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#ifndef hb_atexit
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#if !HB_USE_ATEXIT
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# define hb_atexit(_) HB_STMT_START { if (0) (_) (); } HB_STMT_END
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#else /* HB_USE_ATEXIT */
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# ifdef HAVE_ATEXIT
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# define hb_atexit atexit
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# else
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template <void (*function) (void)> struct hb_atexit_t { ~hb_atexit_t () { function (); } };
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# define hb_atexit(f) static hb_atexit_t<f> _hb_atexit_##__LINE__;
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# endif
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#endif
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#endif
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/* Lets assert int types. Saves trouble down the road. */
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static_assert ((sizeof (hb_codepoint_t) == 4), "");
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static_assert ((sizeof (hb_position_t) == 4), "");
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static_assert ((sizeof (hb_mask_t) == 4), "");
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static_assert ((sizeof (hb_var_int_t) == 4), "");
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/* Headers we include for everyone. Keep topologically sorted by dependency.
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* They express dependency amongst themselves, but no other file should include
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* them directly.*/
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#include "hb-cplusplus.hh"
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#include "hb-meta.hh"
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#include "hb-mutex.hh"
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#include "hb-number.hh"
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#include "hb-atomic.hh" // Requires: hb-meta
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#include "hb-null.hh" // Requires: hb-meta
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#include "hb-algs.hh" // Requires: hb-meta hb-null hb-number
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#include "hb-iter.hh" // Requires: hb-algs hb-meta
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#include "hb-debug.hh" // Requires: hb-algs hb-atomic
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#include "hb-array.hh" // Requires: hb-algs hb-iter hb-null
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#include "hb-vector.hh" // Requires: hb-array hb-null
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#include "hb-object.hh" // Requires: hb-atomic hb-mutex hb-vector
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#endif /* HB_HH */
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