android_lts_support.c
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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* 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.
*
* 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
* COPYRIGHT OWNER 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.
*/
#include <math.h>
#include <errno.h>
#include <malloc.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
#if __ANDROID_API__ < 17
int posix_memalign(void** memptr, size_t alignment, size_t size) {
if ((alignment & (alignment - 1)) != 0 || alignment == 0) {
return EINVAL;
}
if (alignment % sizeof(void*) != 0) {
return EINVAL;
}
*memptr = memalign(alignment, size);
if (*memptr == NULL) {
return errno;
}
return 0;
}
#endif /* __ANDROID_API__ < 17 */
double log2(double x) {
return (log(x) / M_LN2);
}
float log2f(float x) {
return (float) log2((double) x);
}
#ifdef __cplusplus
}; /* end of extern "C" */
#endif
log2
double log2(double x)
Definition: android_lts_support.c:59
log2f
float log2f(float x)
Definition: android_lts_support.c:63
posix_memalign
int posix_memalign(void **memptr, size_t alignment, size_t size)
Definition: android_lts_support.c:40