/* libFLAC - Free Lossless Audio Codec library

 * Copyright (C) 2001-2009  Josh Coalson

 * Copyright (C) 2011-2025  Xiph.Org Foundation

 *

 * 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.

 */

#ifdef HAVE_CONFIG_H

#  include <config.h>

#endif

#ifdef HAVE_STDINT_H

#include <stdint.h>

#endif

#include "private/memory.h"

#include "FLAC/assert.h"

#include "share/compat.h"

#include "share/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, /*+*/31L);

  *aligned_address = (void*)(((uintptr_t)x + 31L) & -32L);

#else

  x = safe_malloc_(bytes);

  *aligned_address = x;

#endif

  return x;

}

FLAC__bool FLAC__memory_alloc_aligned_int32_array(size_t 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);

  if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */

    return false;

  pu = 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_uint32_array(size_t 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);

  if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */

    return false;

  pu = 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_int64_array(size_t elements, FLAC__int64 **unaligned_pointer, FLAC__int64 **aligned_pointer)

{

  FLAC__int64 *pu; /* unaligned pointer */

  union { /* union needed to comply with C99 pointer aliasing rules */

    FLAC__int64 *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);

  if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */

    return false;

  pu = 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(size_t 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);

  if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */

    return false;

  pu = 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(size_t 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);

  if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */

    return false;

  pu = 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

void *safe_malloc_mul_2op_p(size_t size1, size_t size2)

{

  if(!size1 || !size2)

    return malloc(1); /* malloc(0) is undefined; FLAC src convention is to always allocate */

  if(size1 > SIZE_MAX / size2)

    return 0;

  return malloc(size1*size2);

}