1 /* SPDX-License-Identifier: MIT */
3 * Copyright (C) 2016 The Android Open Source Project
6 #if !defined(AVB_INSIDE_LIBAVB_H) && !defined(AVB_COMPILATION)
7 #error "Never include this file directly, include libavb.h instead."
10 #ifndef AVB_SYSDEPS_H_
11 #define AVB_SYSDEPS_H_
17 /* Change these includes to match your platform to bring in the
18 * equivalent types available in a normal C runtime. At least things
19 * like uint8_t, uint64_t, and bool (with |false|, |true| keywords)
24 /* If you don't have gcc or clang, these attribute macros may need to
27 #define AVB_ATTR_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
28 #define AVB_ATTR_PACKED __attribute__((packed))
29 #define AVB_ATTR_NO_RETURN __attribute__((noreturn))
30 #define AVB_ATTR_SENTINEL __attribute__((__sentinel__))
32 /* Size in bytes used for alignment. */
34 #define AVB_ALIGNMENT_SIZE 8
36 #define AVB_ALIGNMENT_SIZE 4
39 /* Compare |n| bytes in |src1| and |src2|.
41 * Returns an integer less than, equal to, or greater than zero if the
42 * first |n| bytes of |src1| is found, respectively, to be less than,
43 * to match, or be greater than the first |n| bytes of |src2|. */
44 int avb_memcmp(const void* src1,
46 size_t n) AVB_ATTR_WARN_UNUSED_RESULT;
48 /* Compare two strings.
50 * Return an integer less than, equal to, or greater than zero if |s1|
51 * is found, respectively, to be less than, to match, or be greater
54 int avb_strcmp(const char* s1, const char* s2);
56 /* Copy |n| bytes from |src| to |dest|. */
57 void* avb_memcpy(void* dest, const void* src, size_t n);
59 /* Set |n| bytes starting at |s| to |c|. Returns |dest|. */
60 void* avb_memset(void* dest, const int c, size_t n);
62 /* Prints out a message. The string passed must be a NUL-terminated
65 void avb_print(const char* message);
67 /* Prints out a vector of strings. Each argument must point to a
68 * NUL-terminated UTF-8 string and NULL should be the last argument.
70 void avb_printv(const char* message, ...) AVB_ATTR_SENTINEL;
72 /* Aborts the program or reboots the device. */
73 void avb_abort(void) AVB_ATTR_NO_RETURN;
75 /* Allocates |size| bytes. Returns NULL if no memory is available,
76 * otherwise a pointer to the allocated memory.
78 * The memory is not initialized.
80 * The pointer returned is guaranteed to be word-aligned.
82 * The memory should be freed with avb_free() when you are done with it.
84 void* avb_malloc_(size_t size) AVB_ATTR_WARN_UNUSED_RESULT;
86 /* Frees memory previously allocated with avb_malloc(). */
87 void avb_free(void* ptr);
89 /* Returns the lenght of |str|, excluding the terminating NUL-byte. */
90 size_t avb_strlen(const char* str) AVB_ATTR_WARN_UNUSED_RESULT;
92 /* Divide the |dividend| by 10 and saves back to the pointer. Return the
94 uint32_t avb_div_by_10(uint64_t* dividend);
100 #endif /* AVB_SYSDEPS_H_ */