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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#if !defined (BVB_INSIDE_BVB_REFIMPL_H) && !defined (BVB_REFIMPL_COMPILATION)
#error "Never include this file directly, include bvb_refimpl.h instead."
#endif
#ifndef BVB_SYSDEPS_H_
#define BVB_SYSDEPS_H_
#ifdef __cplusplus
extern "C" {
#endif
/* Change these includes to match your platform to bring in the
* equivalent types available in a normal C runtime, as well as
* printf()-format specifiers such as PRIx64.
*/
#include <stddef.h>
#include <stdint.h>
#include <inttypes.h>
#ifdef BVB_ENABLE_DEBUG
/* Aborts the program if |expr| is false.
*
* This has no effect unless BVB_ENABLE_DEBUG is defined.
*/
#define bvb_assert(expr) do { if (!(expr)) { \
bvb_error("assert fail: %s at %s:%d\n", \
#expr, __FILE__, __LINE__); }} while(0)
#else
#define bvb_assert(expr)
#endif
/* Size in bytes used for word-alignment.
*
* Change this to match your architecture - must be a power of two.
*/
#define BVB_WORD_ALIGNMENT_SIZE 8
/* Aborts the program if |addr| is not word-aligned.
*
* This has no effect unless BVB_ENABLE_DEBUG is defined.
*/
#define bvb_assert_word_aligned(addr) \
bvb_assert((((uintptr_t) addr) & (BVB_WORD_ALIGNMENT_SIZE-1)) == 0)
/* Compare |n| bytes in |src1| and |src2|.
*
* Returns an integer less than, equal to, or greater than zero if the
* first |n| bytes of |src1| is found, respectively, to be less than,
* to match, or be greater than the first |n| bytes of |src2|. */
int bvb_memcmp(const void* src1, const void* src2, size_t n);
/* Copy |n| bytes from |src| to |dest|. */
void* bvb_memcpy(void* dest, const void* src, size_t n);
/* Set |n| bytes starting at |s| to |c|. Returns |dest|. */
void* bvb_memset(void* dest, const int c, size_t n);
/* Compare |n| bytes starting at |s1| with |s2| and return 0 if they
* match, 1 if they don't. Returns 0 if |n|==0, since no bytes
* mismatched.
*
* Time taken to perform the comparison is only dependent on |n| and
* not on the relationship of the match between |s1| and |s2|.
*
* Note that unlike bvb_memcmp(), this only indicates inequality, not
* whether |s1| is less than or greater than |s2|.
*/
int bvb_safe_memcmp(const void* s1, const void* s2, size_t n);
#ifdef BVB_ENABLE_DEBUG
/* printf()-style function, used for diagnostics.
*
* This has no effect unless BVB_ENABLE_DEBUG is defined.
*/
void bvb_debug(const char* format, ...) __attribute__((format(printf, 1, 2)));
#else
static inline void bvb_debug(const char* format, ...)
__attribute__((format(printf, 1, 2)));
static inline void bvb_debug(const char* format, ...) {}
#endif
/* Prints out a message (defined by |format|, printf()-style) and
* aborts the program or reboots the device.
*
* Unlike bvb_debug(), this function does not depend on BVB_ENABLE_DEBUG.
*/
void bvb_error(const char* format, ...) __attribute__((format(printf, 1, 2)));
/* Allocates |size| bytes. Returns NULL if no memory is available,
* otherwise a pointer to the allocated memory.
*
* The memory is not initialized.
*
* The pointer returned is guaranteed to be word-aligned.
*
* The memory should be freed with bvb_free() when you are done with it.
*/
void* bvb_malloc(size_t size);
/* Frees memory previously allocated with bvb_malloc(). */
void bvb_free(void* ptr);
/* Returns the lenght of |str|, excluding the terminating NUL-byte. */
size_t bvb_strlen(const char* str);
#ifdef __cplusplus
}
#endif
#endif /* BVB_SYSDEPS_H_ */
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