Add FLAC to trunk/deps/third_party/....

flac/src/libFLAC/memory.c

+/* 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 "private/memory.h"
+#include "FLAC/assert.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, /*+*/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);
+
+        if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
+                return false;
+
+        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);
+
+        if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
+                return false;
+
+        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);
+
+        if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
+                return false;
+
+        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);
+
+        if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
+                return false;
+
+        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);
+
+        if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
+                return false;
+
+        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