1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
#include "byte.h"
/**
@file byte.c
@author djb
@brief byte manipulation functions
*/
unsigned int byte_chr(char *s, unsigned int n, int c)
{
char ch = c;
char *t = s;
for (;;) {
// clang-format off
if (!n) { break; } if (*t == ch) { break; } ++t; --n;
if (!n) { break; } if (*t == ch) { break; } ++t; --n;
if (!n) { break; } if (*t == ch) { break; } ++t; --n;
if (!n) { break; } if (*t == ch) { break; } ++t; --n;
// clang-format on
}
return t - s;
}
void byte_copy(void *a, unsigned int n, const void *b)
{
char *to = a;
const char *from = b;
for (;;) {
// clang-format off
if (!n) { return; } *to++ = *from++; --n;
if (!n) { return; } *to++ = *from++; --n;
if (!n) { return; } *to++ = *from++; --n;
if (!n) { return; } *to++ = *from++; --n;
// clang-format on
}
}
void byte_copyr(void *a, unsigned int n, const void *b)
{
char *to = a + n;
const char *from = b + n;
for (;;) {
// clang-format off
if (!n) { return; } *--to = *--from; --n;
if (!n) { return; } *--to = *--from; --n;
if (!n) { return; } *--to = *--from; --n;
if (!n) { return; } *--to = *--from; --n;
// clang-format on
}
}
int byte_diff(const void *a, unsigned int n, const void *b)
{
const char *s = a;
const char *t = b;
for (;;) {
// clang-format off
if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
// clang-format on
}
return ((int)(unsigned int)(unsigned char)*s) - ((int)(unsigned int)(unsigned char)*t);
}
unsigned int byte_rchr(char *s, unsigned int n, int c)
{
char ch = c;
char *t = s;
char *u = 0;
for (;;) {
// clang-format off
if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
// clang-format on
}
if (!u) u = t;
return u - s;
}
void byte_zero(void *v, unsigned int n)
{
char *s = v;
for (;;) {
// clang-format off
if (!n) { break; } *s++ = 0; --n;
if (!n) { break; } *s++ = 0; --n;
if (!n) { break; } *s++ = 0; --n;
if (!n) { break; } *s++ = 0; --n;
// clang-format on
}
}
void byte_fill(void *a, unsigned int n, int c)
{
char *s = a;
char ch = c;
for (;;) {
// clang-format off
if (!n) { break; } *s++ = ch; --n;
if (!n) { break; } *s++ = ch; --n;
if (!n) { break; } *s++ = ch; --n;
if (!n) { break; } *s++ = ch; --n;
// clang-format on
}
}
|
