src/hb-private.h - third_party/harfbuzz - Git at Google

 /*
  * Copyright (C) 2007,2008,2009  Red Hat, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
  *
  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  * DAMAGE.
  *
  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  *
  * Red Hat Author(s): Behdad Esfahbod
  */

 #ifndef HB_PRIVATE_H
 #define HB_PRIVATE_H

 #if HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include "hb-common.h"

 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>

 /* We only use these two for debug output.  However, the debug code is
  * always seen by the compiler (and optimized out in non-debug builds.
  * If including these becomes a problem, we can start thinking about
  * someway around that. */
 #include <stdio.h>
 #include <errno.h>

 HB_BEGIN_DECLS


 /* Essentials */

 #ifndef NULL
 # define NULL ((void *) 0)
 #endif

 #undef FALSE
 #define FALSE 0

 #undef TRUE
 #define TRUE 1


 /* Basics */

 #undef MIN
 #define MIN(a,b) ((a) < (b) ? (a) : (b))

 #undef MAX
 #define MAX(a,b) ((a) > (b) ? (a) : (b))

 #undef  ARRAY_LENGTH
 #define ARRAY_LENGTH(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))

 #define HB_STMT_START do
 #define HB_STMT_END   while (0)

 #define _ASSERT_STATIC1(_line, _cond) typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
 #define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
 #define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))


 /* Misc */


 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
 #define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
 #define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
 #define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0))
 #else
 #define likely(expr) (expr)
 #define unlikely(expr) (expr)
 #endif

 #ifndef __GNUC__
 #undef __attribute__
 #define __attribute__(x)
 #endif

 #if __GNUC__ >= 3
 #define HB_PURE_FUNC	__attribute__((pure))
 #define HB_CONST_FUNC	__attribute__((const))
 #else
 #define HB_PURE_FUNC
 #define HB_CONST_FUNC
 #endif
 #if __GNUC__ >= 4
 #define HB_UNUSED	__attribute__((unused))
 #else
 #define HB_UNUSED
 #endif

 #ifndef HB_INTERNAL
 # define HB_INTERNAL __attribute__((__visibility__("hidden")))
 #endif


 #if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER)
 #define snprintf _snprintf
 #endif

 #ifdef _MSC_VER
 #undef inline
 #define inline __inline
 #endif

 #ifdef __STRICT_ANSI__
 #undef inline
 #define inline __inline__
 #endif


 #if __GNUC__ >= 3
 #define HB_FUNC __PRETTY_FUNCTION__
 #elif defined(_MSC_VER)
 #define HB_FUNC __FUNCSIG__
 #else
 #define HB_FUNC __func__
 #endif


 /* Return the number of 1 bits in mask. */
 static inline HB_CONST_FUNC unsigned int
 _hb_popcount32 (uint32_t mask)
 {
 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
   return __builtin_popcount (mask);
 #else
   /* "HACKMEM 169" */
   register uint32_t y;
   y = (mask >> 1) &033333333333;
   y = mask - y - ((y >>1) & 033333333333);
   return (((y + (y >> 3)) & 030707070707) % 077);
 #endif
 }

 /* Returns the number of bits needed to store number */
 static inline HB_CONST_FUNC unsigned int
 _hb_bit_storage (unsigned int number)
 {
 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
   return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0;
 #else
   register unsigned int n_bits = 0;
   while (number) {
     n_bits++;
     number >>= 1;
   }
   return n_bits;
 #endif
 }

 /* Returns the number of zero bits in the least significant side of number */
 static inline HB_CONST_FUNC unsigned int
 _hb_ctz (unsigned int number)
 {
 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
   return likely (number) ? __builtin_ctz (number) : 0;
 #else
   register unsigned int n_bits = 0;
   if (unlikely (!number)) return 0;
   while (!(number & 1)) {
     n_bits++;
     number >>= 1;
   }
   return n_bits;
 #endif
 }

 /* We need external help for these */

 #ifdef HAVE_GLIB

 #include <glib.h>

 typedef int hb_atomic_int_t;
 #define hb_atomic_int_fetch_and_add(AI, V)	g_atomic_int_exchange_and_add (&(AI), V)
 #define hb_atomic_int_get(AI)			g_atomic_int_get (&(AI))
 #define hb_atomic_int_set(AI, V)		g_atomic_int_set (&(AI), V)

 typedef GStaticMutex hb_mutex_t;
 #define HB_MUTEX_INIT			G_STATIC_MUTEX_INIT
 #define hb_mutex_init(M)		g_static_mutex_init (&M)
 #define hb_mutex_lock(M)		g_static_mutex_lock (&M)
 #define hb_mutex_trylock(M)		g_static_mutex_trylock (&M)
 #define hb_mutex_unlock(M)		g_static_mutex_unlock (&M)

 #else

 #ifdef _MSC_VER
 #pragma message(__LOC__"Could not find any system to define platform macros, library will NOT be thread-safe")
 #else
 #warning "Could not find any system to define platform macros, library will NOT be thread-safe"
 #endif

 typedef int hb_atomic_int_t;
 #define hb_atomic_int_fetch_and_add(AI, V)	((AI) += (V), (AI) - (V))
 #define hb_atomic_int_get(AI)			(AI)
 #define hb_atomic_int_set(AI, V)		HB_STMT_START { (AI) = (V); } HB_STMT_END

 typedef int hb_mutex_t;
 #define HB_MUTEX_INIT				0
 #define hb_mutex_init(M)			HB_STMT_START { (M) = 0; } HB_STMT_END
 #define hb_mutex_lock(M)			HB_STMT_START { (M) = 1; } HB_STMT_END
 #define hb_mutex_trylock(M)			((M) = 1, 1)
 #define hb_mutex_unlock(M)			HB_STMT_START { (M) = 0; } HB_STMT_END

 #endif


 /* Big-endian handling */

 #define hb_be_uint16(v)		((uint16_t) ((((const uint8_t *)&(v))[0] << 8) + (((const uint8_t *)&(v))[1])))

 #define hb_be_uint16_put(v,V)	HB_STMT_START { v[0] = (V>>8); v[1] = (V); } HB_STMT_END
 #define hb_be_uint16_get(v)	(uint16_t) ((v[0] << 8) + v[1])
 #define hb_be_uint16_cmp(a,b)	(a[0] == b[0] && a[1] == b[1])

 #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
 #define hb_be_uint32_get(v)	(uint32_t) ((v[0] << 24) + (v[1] << 16) + (v[2] << 8) + v[3])
 #define hb_be_uint32_cmp(a,b)	(a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3])


 /* Debug */

 #ifndef HB_DEBUG
 #define HB_DEBUG 0
 #endif

 static inline hb_bool_t /* always returns TRUE */
 _hb_trace (const char *what,
 	   const char *function,
 	   const void *obj,
 	   unsigned int depth,
 	   unsigned int max_depth)
 {
   if (depth < max_depth)
     fprintf (stderr, "%s(%p) %-*d-> %s\n", what, obj, depth, depth, function);
   return TRUE;
 }


 #include "hb-object-private.h"


 HB_END_DECLS

 #endif /* HB_PRIVATE_H */
	/*
	* Copyright (C) 2007,2008,2009 Red Hat, Inc.
	*
	* This is part of HarfBuzz, a text shaping library.
	*
	* Permission is hereby granted, without written agreement and without
	* license or royalty fees, to use, copy, modify, and distribute this
	* software and its documentation for any purpose, provided that the
	* above copyright notice and the following two paragraphs appear in
	* all copies of this software.
	*
	* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
	* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
	* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
	* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
	* DAMAGE.
	*
	* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
	* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
	* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
	* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
	* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
	*
	* Red Hat Author(s): Behdad Esfahbod
	*/

	#ifndef HB_PRIVATE_H
	#define HB_PRIVATE_H

	#if HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include "hb-common.h"

	#include <stdlib.h>
	#include <string.h>
	#include <assert.h>

	/* We only use these two for debug output. However, the debug code is
	* always seen by the compiler (and optimized out in non-debug builds.
	* If including these becomes a problem, we can start thinking about
	* someway around that. */
	#include <stdio.h>
	#include <errno.h>

	HB_BEGIN_DECLS


	/* Essentials */

	#ifndef NULL
	# define NULL ((void *) 0)
	#endif

	#undef FALSE
	#define FALSE 0

	#undef TRUE
	#define TRUE 1


	/* Basics */

	#undef MIN
	#define MIN(a,b) ((a) < (b) ? (a) : (b))

	#undef MAX
	#define MAX(a,b) ((a) > (b) ? (a) : (b))

	#undef ARRAY_LENGTH
	#define ARRAY_LENGTH(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))

	#define HB_STMT_START do
	#define HB_STMT_END while (0)

	#define _ASSERT_STATIC1(_line, _cond) typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
	#define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
	#define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))


	/* Misc */


	#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
	#define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
	#define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
	#define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0))
	#else
	#define likely(expr) (expr)
	#define unlikely(expr) (expr)
	#endif

	#ifndef __GNUC__
	#undef __attribute__
	#define __attribute__(x)
	#endif

	#if __GNUC__ >= 3
	#define HB_PURE_FUNC __attribute__((pure))
	#define HB_CONST_FUNC __attribute__((const))
	#else
	#define HB_PURE_FUNC
	#define HB_CONST_FUNC
	#endif
	#if __GNUC__ >= 4
	#define HB_UNUSED __attribute__((unused))
	#else
	#define HB_UNUSED
	#endif

	#ifndef HB_INTERNAL
	# define HB_INTERNAL __attribute__((__visibility__("hidden")))
	#endif


	#if (defined(__WIN32__) && !defined(__WINE__)) \|\| defined(_MSC_VER)
	#define snprintf _snprintf
	#endif

	#ifdef _MSC_VER
	#undef inline
	#define inline __inline
	#endif

	#ifdef __STRICT_ANSI__
	#undef inline
	#define inline __inline__
	#endif


	#if __GNUC__ >= 3
	#define HB_FUNC __PRETTY_FUNCTION__
	#elif defined(_MSC_VER)
	#define HB_FUNC __FUNCSIG__
	#else
	#define HB_FUNC __func__
	#endif


	/* Return the number of 1 bits in mask. */
	static inline HB_CONST_FUNC unsigned int
	_hb_popcount32 (uint32_t mask)
	{
	#if __GNUC__ > 3 \|\| (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
	return __builtin_popcount (mask);
	#else
	/* "HACKMEM 169" */
	register uint32_t y;
	y = (mask >> 1) &033333333333;
	y = mask - y - ((y >>1) & 033333333333);
	return (((y + (y >> 3)) & 030707070707) % 077);
	#endif
	}

	/* Returns the number of bits needed to store number */
	static inline HB_CONST_FUNC unsigned int
	_hb_bit_storage (unsigned int number)
	{
	#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
	return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0;
	#else
	register unsigned int n_bits = 0;
	while (number) {
	n_bits++;
	number >>= 1;
	}
	return n_bits;
	#endif
	}

	/* Returns the number of zero bits in the least significant side of number */
	static inline HB_CONST_FUNC unsigned int
	_hb_ctz (unsigned int number)
	{
	#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
	return likely (number) ? __builtin_ctz (number) : 0;
	#else
	register unsigned int n_bits = 0;
	if (unlikely (!number)) return 0;
	while (!(number & 1)) {
	n_bits++;
	number >>= 1;
	}
	return n_bits;
	#endif
	}

	/* We need external help for these */

	#ifdef HAVE_GLIB

	#include <glib.h>

	typedef int hb_atomic_int_t;
	#define hb_atomic_int_fetch_and_add(AI, V) g_atomic_int_exchange_and_add (&(AI), V)
	#define hb_atomic_int_get(AI) g_atomic_int_get (&(AI))
	#define hb_atomic_int_set(AI, V) g_atomic_int_set (&(AI), V)

	typedef GStaticMutex hb_mutex_t;
	#define HB_MUTEX_INIT G_STATIC_MUTEX_INIT
	#define hb_mutex_init(M) g_static_mutex_init (&M)
	#define hb_mutex_lock(M) g_static_mutex_lock (&M)
	#define hb_mutex_trylock(M) g_static_mutex_trylock (&M)
	#define hb_mutex_unlock(M) g_static_mutex_unlock (&M)

	#else

	#ifdef _MSC_VER
	#pragma message(__LOC__"Could not find any system to define platform macros, library will NOT be thread-safe")
	#else
	#warning "Could not find any system to define platform macros, library will NOT be thread-safe"
	#endif

	typedef int hb_atomic_int_t;
	#define hb_atomic_int_fetch_and_add(AI, V) ((AI) += (V), (AI) - (V))
	#define hb_atomic_int_get(AI) (AI)
	#define hb_atomic_int_set(AI, V) HB_STMT_START { (AI) = (V); } HB_STMT_END

	typedef int hb_mutex_t;
	#define HB_MUTEX_INIT 0
	#define hb_mutex_init(M) HB_STMT_START { (M) = 0; } HB_STMT_END
	#define hb_mutex_lock(M) HB_STMT_START { (M) = 1; } HB_STMT_END
	#define hb_mutex_trylock(M) ((M) = 1, 1)
	#define hb_mutex_unlock(M) HB_STMT_START { (M) = 0; } HB_STMT_END

	#endif


	/* Big-endian handling */

	#define hb_be_uint16(v) ((uint16_t) ((((const uint8_t )&(v))[0] << 8) + (((const uint8_t )&(v))[1])))

	#define hb_be_uint16_put(v,V) HB_STMT_START { v[0] = (V>>8); v[1] = (V); } HB_STMT_END
	#define hb_be_uint16_get(v) (uint16_t) ((v[0] << 8) + v[1])
	#define hb_be_uint16_cmp(a,b) (a[0] == b[0] && a[1] == b[1])

	#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
	#define hb_be_uint32_get(v) (uint32_t) ((v[0] << 24) + (v[1] << 16) + (v[2] << 8) + v[3])
	#define hb_be_uint32_cmp(a,b) (a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3])


	/* Debug */

	#ifndef HB_DEBUG
	#define HB_DEBUG 0
	#endif

	static inline hb_bool_t /* always returns TRUE */
	_hb_trace (const char *what,
	const char *function,
	const void *obj,
	unsigned int depth,
	unsigned int max_depth)
	{
	if (depth < max_depth)
	fprintf (stderr, "%s(%p) %-*d-> %s\n", what, obj, depth, depth, function);
	return TRUE;
	}


	#include "hb-object-private.h"


	HB_END_DECLS

	#endif /* HB_PRIVATE_H */