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Diffstat (limited to 'src/libFLAC/memory.c')
| -rw-r--r-- | src/libFLAC/memory.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/libFLAC/memory.c b/src/libFLAC/memory.c new file mode 100644 index 0000000..ad5371e --- /dev/null +++ b/src/libFLAC/memory.c @@ -0,0 +1,219 @@ +/* libFLAC - Free Lossless Audio Codec library + * Copyright (C) 2001-2009 Josh Coalson + * Copyright (C) 2011-2023 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); +} |