avb_sysdeps.h
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/* SPDX-License-Identifier: MIT */
/*
* Copyright (C) 2016 The Android Open Source Project
*/
#if !defined(AVB_INSIDE_LIBAVB_H) && !defined(AVB_COMPILATION)
#error "Never include this file directly, include libavb.h instead."
#endif
#ifndef AVB_SYSDEPS_H_
#define AVB_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. At least things
* like uint8_t, uint64_t, and bool (with |false|, |true| keywords)
* must be present.
*/
#include <common.h>
/* If you don't have gcc or clang, these attribute macros may need to
* be adjusted.
*/
#define AVB_ATTR_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#define AVB_ATTR_PACKED __attribute__((packed))
#define AVB_ATTR_NO_RETURN __attribute__((noreturn))
#define AVB_ATTR_SENTINEL __attribute__((__sentinel__))
/* Size in bytes used for alignment. */
#ifdef __LP64__
#define AVB_ALIGNMENT_SIZE 8
#else
#define AVB_ALIGNMENT_SIZE 4
#endif
/* 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 avb_memcmp(const void* src1,
const void* src2,
size_t n) AVB_ATTR_WARN_UNUSED_RESULT;
/* Compare two strings.
*
* Return an integer less than, equal to, or greater than zero if |s1|
* is found, respectively, to be less than, to match, or be greater
* than |s2|.
*/
int avb_strcmp(const char* s1, const char* s2);
/* Compare |n| bytes in two strings.
*
* Return an integer less than, equal to, or greater than zero if the
* first |n| bytes of |s1| is found, respectively, to be less than,
* to match, or be greater than the first |n| bytes of |s2|.
*/
int avb_strncmp(const char* s1, const char* s2, size_t n);
/* Copy |n| bytes from |src| to |dest|. */
void* avb_memcpy(void* dest, const void* src, size_t n);
/* Set |n| bytes starting at |s| to |c|. Returns |dest|. */
void* avb_memset(void* dest, const int c, size_t n);
/* Prints out a message. The string passed must be a NUL-terminated
* UTF-8 string.
*/
void avb_print(const char* message);
/* Prints out a vector of strings. Each argument must point to a
* NUL-terminated UTF-8 string and NULL should be the last argument.
*/
void avb_printv(const char* message, ...) AVB_ATTR_SENTINEL;
/* Aborts the program or reboots the device. */
void avb_abort(void) AVB_ATTR_NO_RETURN;
/* 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 avb_free() when you are done with it.
*/
void* avb_malloc_(size_t size) AVB_ATTR_WARN_UNUSED_RESULT;
/* Frees memory previously allocated with avb_malloc(). */
void avb_free(void* ptr);
/* Returns the lenght of |str|, excluding the terminating NUL-byte. */
size_t avb_strlen(const char* str) AVB_ATTR_WARN_UNUSED_RESULT;
/* Divide the |dividend| by 10 and saves back to the pointer. Return the
* remainder. */
uint32_t avb_div_by_10(uint64_t* dividend);
#ifdef __cplusplus
}
#endif
#endif /* AVB_SYSDEPS_H_ */