text: /* libFLAC - Free Lossless Audio Codec library
   * Copyright (C) 2001,2002,2003,2004,2005,2006,2007  Josh Coalson
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * - Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   *
   * - Neither the name of the Xiph.org Foundation nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #if HAVE_CONFIG_H
  #  include <config.h>
  #endif
  
  #include "include/private/memory.h"
  #include "../assert.h"
  #include "../alloc.h"
  
  void *FLAC__memory_alloc_aligned(size_t bytes, void **aligned_address)
  {
  	void *x;
  
  	FLAC__ASSERT(0 != aligned_address);
  
  #ifdef FLAC__ALIGN_MALLOC_DATA
  	/* align on 32-byte (256-bit) boundary */
  	x = safe_malloc_add_2op_(bytes, /*+*/31);
  #ifdef SIZEOF_VOIDP
  #if SIZEOF_VOIDP == 4
  		/* could do  *aligned_address = x + ((unsigned) (32 - (((unsigned)x) & 31))) & 31; */
  		*aligned_address = (void*)(((unsigned)x + 31) & -32);
  #elif SIZEOF_VOIDP == 8
  		*aligned_address = (void*)(((FLAC__uint64)x + 31) & (FLAC__uint64)(-((FLAC__int64)32)));
  #else
  # error  Unsupported sizeof(void*)
  #endif
  #else
  	/* there's got to be a better way to do this right for all archs */
  	if(sizeof(void*) == sizeof(unsigned))
  		*aligned_address = (void*)(((unsigned)x + 31) & -32);
  	else if(sizeof(void*) == sizeof(FLAC__uint64))
  		*aligned_address = (void*)(((FLAC__uint64)x + 31) & (FLAC__uint64)(-((FLAC__int64)32)));
  	else
  		return 0;
  #endif
  #else
  	x = safe_malloc_(bytes);
  	*aligned_address = x;
  #endif
  	return x;
  }
  
  FLAC__bool FLAC__memory_alloc_aligned_int32_array(unsigned elements, FLAC__int32 **unaligned_pointer, FLAC__int32 **aligned_pointer)
  {
  	FLAC__int32 *pu; /* unaligned pointer */
  	union { /* union needed to comply with C99 pointer aliasing rules */
  		FLAC__int32 *pa; /* aligned pointer */
  		void        *pv; /* aligned pointer alias */
  	} u;
  
  	FLAC__ASSERT(elements > 0);
  	FLAC__ASSERT(0 != unaligned_pointer);
  	FLAC__ASSERT(0 != aligned_pointer);
  	FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  
  	pu = (FLAC__int32*)FLAC__memory_alloc_aligned(sizeof(*pu) * (size_t)elements, &u.pv);
  	if(0 == pu) {
  		return false;
  	}
  	else {
  		if(*unaligned_pointer != 0)
  			free(*unaligned_pointer);
  		*unaligned_pointer = pu;
  		*aligned_pointer = u.pa;
  		return true;
  	}
  }
  
  FLAC__bool FLAC__memory_alloc_aligned_uint32_array(unsigned elements, FLAC__uint32 **unaligned_pointer, FLAC__uint32 **aligned_pointer)
  {
  	FLAC__uint32 *pu; /* unaligned pointer */
  	union { /* union needed to comply with C99 pointer aliasing rules */
  		FLAC__uint32 *pa; /* aligned pointer */
  		void         *pv; /* aligned pointer alias */
  	} u;
  
  	FLAC__ASSERT(elements > 0);
  	FLAC__ASSERT(0 != unaligned_pointer);
  	FLAC__ASSERT(0 != aligned_pointer);
  	FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  
  	pu = (FLAC__uint32*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
  	if(0 == pu) {
  		return false;
  	}
  	else {
  		if(*unaligned_pointer != 0)
  			free(*unaligned_pointer);
  		*unaligned_pointer = pu;
  		*aligned_pointer = u.pa;
  		return true;
  	}
  }
  
  FLAC__bool FLAC__memory_alloc_aligned_uint64_array(unsigned elements, FLAC__uint64 **unaligned_pointer, FLAC__uint64 **aligned_pointer)
  {
  	FLAC__uint64 *pu; /* unaligned pointer */
  	union { /* union needed to comply with C99 pointer aliasing rules */
  		FLAC__uint64 *pa; /* aligned pointer */
  		void         *pv; /* aligned pointer alias */
  	} u;
  
  	FLAC__ASSERT(elements > 0);
  	FLAC__ASSERT(0 != unaligned_pointer);
  	FLAC__ASSERT(0 != aligned_pointer);
  	FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  
  	pu = (FLAC__uint64*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
  	if(0 == pu) {
  		return false;
  	}
  	else {
  		if(*unaligned_pointer != 0)
  			free(*unaligned_pointer);
  		*unaligned_pointer = pu;
  		*aligned_pointer = u.pa;
  		return true;
  	}
  }
  
  FLAC__bool FLAC__memory_alloc_aligned_unsigned_array(unsigned elements, unsigned **unaligned_pointer, unsigned **aligned_pointer)
  {
  	unsigned *pu; /* unaligned pointer */
  	union { /* union needed to comply with C99 pointer aliasing rules */
  		unsigned *pa; /* aligned pointer */
  		void     *pv; /* aligned pointer alias */
  	} u;
  
  	FLAC__ASSERT(elements > 0);
  	FLAC__ASSERT(0 != unaligned_pointer);
  	FLAC__ASSERT(0 != aligned_pointer);
  	FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  
  	pu = (unsigned*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
  	if(0 == pu) {
  		return false;
  	}
  	else {
  		if(*unaligned_pointer != 0)
  			free(*unaligned_pointer);
  		*unaligned_pointer = pu;
  		*aligned_pointer = u.pa;
  		return true;
  	}
  }
  
  #ifndef FLAC__INTEGER_ONLY_LIBRARY
  
  FLAC__bool FLAC__memory_alloc_aligned_real_array(unsigned elements, FLAC__real **unaligned_pointer, FLAC__real **aligned_pointer)
  {
  	FLAC__real *pu; /* unaligned pointer */
  	union { /* union needed to comply with C99 pointer aliasing rules */
  		FLAC__real *pa; /* aligned pointer */
  		void       *pv; /* aligned pointer alias */
  	} u;
  
  	FLAC__ASSERT(elements > 0);
  	FLAC__ASSERT(0 != unaligned_pointer);
  	FLAC__ASSERT(0 != aligned_pointer);
  	FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  
  	pu = (FLAC__real*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
  	if(0 == pu) {
  		return false;
  	}
  	else {
  		if(*unaligned_pointer != 0)
  			free(*unaligned_pointer);
  		*unaligned_pointer = pu;
  		*aligned_pointer = u.pa;
  		return true;
  	}
  }
  
  #endif
  