268 lines
6.9 KiB
C
268 lines
6.9 KiB
C
/*
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* Copyright (C) 2007,2008,2009 Red Hat, 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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*/
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#ifndef HB_PRIVATE_H
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#define HB_PRIVATE_H
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "hb-common.h"
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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/* We only use these two for debug output. However, the debug code is
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* always seen by the compiler (and optimized out in non-debug builds.
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* If including these becomes a problem, we can start thinking about
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* someway around that. */
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#include <stdio.h>
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#include <errno.h>
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HB_BEGIN_DECLS
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/* Essentials */
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#ifndef NULL
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# define NULL ((void *) 0)
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#endif
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#undef FALSE
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#define FALSE 0
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#undef TRUE
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#define TRUE 1
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/* Basics */
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#undef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#undef MAX
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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#undef ARRAY_LENGTH
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#define ARRAY_LENGTH(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))
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#define HB_STMT_START do
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#define HB_STMT_END while (0)
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#define _ASSERT_STATIC1(_line, _cond) typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
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#define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
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#define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))
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/* Misc */
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#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
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#define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
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#define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
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#define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(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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#ifndef __GNUC__
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#undef __attribute__
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#define __attribute__(x)
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#endif
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#if __GNUC__ >= 3
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#define HB_PURE_FUNC __attribute__((pure))
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#define HB_CONST_FUNC __attribute__((const))
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#else
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#define HB_PURE_FUNC
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#define HB_CONST_FUNC
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#endif
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#if __GNUC__ >= 4
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#define HB_UNUSED __attribute__((unused))
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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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# define HB_INTERNAL __attribute__((__visibility__("hidden")))
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#endif
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#if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER)
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#define snprintf _snprintf
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#endif
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#ifdef _MSC_VER
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#undef inline
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#define inline __inline
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#endif
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#ifdef __STRICT_ANSI__
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#undef inline
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#define inline __inline__
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#endif
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#if __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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/* Return the number of 1 bits in mask. */
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static inline HB_CONST_FUNC unsigned int
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_hb_popcount32 (uint32_t mask)
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{
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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return __builtin_popcount (mask);
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#else
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/* "HACKMEM 169" */
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register uint32_t y;
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y = (mask >> 1) &033333333333;
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y = mask - y - ((y >>1) & 033333333333);
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return (((y + (y >> 3)) & 030707070707) % 077);
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#endif
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}
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/* Returns the number of bits needed to store number */
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static inline HB_CONST_FUNC unsigned int
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_hb_bit_storage (unsigned int number)
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{
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#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
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return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0;
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#else
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register unsigned int n_bits = 0;
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while (number) {
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n_bits++;
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number >>= 1;
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}
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return n_bits;
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#endif
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}
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/* Returns the number of zero bits in the least significant side of number */
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static inline HB_CONST_FUNC unsigned int
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_hb_ctz (unsigned int number)
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{
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#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
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return likely (number) ? __builtin_ctz (number) : 0;
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#else
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register unsigned int n_bits = 0;
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if (unlikely (!number)) return 0;
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while (!(number & 1)) {
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n_bits++;
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number >>= 1;
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}
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return n_bits;
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#endif
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}
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/* We need external help for these */
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#ifdef HAVE_GLIB
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#include <glib.h>
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typedef int hb_atomic_int_t;
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#define hb_atomic_int_fetch_and_add(AI, V) g_atomic_int_exchange_and_add (&(AI), V)
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#define hb_atomic_int_get(AI) g_atomic_int_get (&(AI))
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#define hb_atomic_int_set(AI, V) g_atomic_int_set (&(AI), V)
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typedef GStaticMutex hb_mutex_t;
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#define HB_MUTEX_INIT G_STATIC_MUTEX_INIT
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#define hb_mutex_init(M) g_static_mutex_init (&M)
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#define hb_mutex_lock(M) g_static_mutex_lock (&M)
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#define hb_mutex_trylock(M) g_static_mutex_trylock (&M)
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#define hb_mutex_unlock(M) g_static_mutex_unlock (&M)
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#else
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#ifdef _MSC_VER
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#pragma message(__LOC__"Could not find any system to define platform macros, library will NOT be thread-safe")
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#else
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#warning "Could not find any system to define platform macros, library will NOT be thread-safe"
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#endif
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typedef int hb_atomic_int_t;
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#define hb_atomic_int_fetch_and_add(AI, V) ((AI) += (V), (AI) - (V))
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#define hb_atomic_int_get(AI) (AI)
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#define hb_atomic_int_set(AI, V) HB_STMT_START { (AI) = (V); } HB_STMT_END
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typedef int hb_mutex_t;
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#define HB_MUTEX_INIT 0
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#define hb_mutex_init(M) HB_STMT_START { (M) = 0; } HB_STMT_END
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#define hb_mutex_lock(M) HB_STMT_START { (M) = 1; } HB_STMT_END
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#define hb_mutex_trylock(M) ((M) = 1, 1)
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#define hb_mutex_unlock(M) HB_STMT_START { (M) = 0; } HB_STMT_END
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#endif
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/* Big-endian handling */
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#define hb_be_uint16(v) ((uint16_t) ((((const uint8_t *)&(v))[0] << 8) + (((const uint8_t *)&(v))[1])))
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#define hb_be_uint16_put(v,V) HB_STMT_START { v[0] = (V>>8); v[1] = (V); } HB_STMT_END
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#define hb_be_uint16_get(v) (uint16_t) ((v[0] << 8) + v[1])
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#define hb_be_uint16_cmp(a,b) (a[0] == b[0] && a[1] == b[1])
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#define hb_be_uint32_put(v,V) HB_STMT_START { v[0] = (V>>24); v[1] = (V>>16); v[2] = (V>>8); v[3] = (V); } HB_STMT_END
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#define hb_be_uint32_get(v) (uint32_t) ((v[0] << 24) + (v[1] << 16) + (v[2] << 8) + v[3])
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#define hb_be_uint32_cmp(a,b) (a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3])
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/* Debug */
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#ifndef HB_DEBUG
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#define HB_DEBUG 0
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#endif
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static inline hb_bool_t /* always returns TRUE */
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_hb_trace (const char *what,
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const char *function,
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const void *obj,
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unsigned int depth,
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unsigned int max_depth)
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{
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if (depth < max_depth)
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fprintf (stderr, "%s(%p) %-*d-> %s\n", what, obj, depth, depth, function);
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return TRUE;
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}
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#include "hb-object-private.h"
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HB_END_DECLS
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#endif /* HB_PRIVATE_H */
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