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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#ifndef APOS_STRING_H
#define APOS_STRING_H
#include <apos/types.h>
#include <apos/builtin.h>
/* follow C library functions, drop location and error functions */
char *strcpy(char *dst, const char *src);
char *strncpy(char *dst, const char *src, size_t num);
char *strcat(char *dst, const char *src);
char *strncat(char *dst, const char *src, size_t num);
int strcmp(const char *str1, const char *str2);
int strncmp(const char *str1, const char *str2, size_t num);
char *strchr(const char *str, int chr);
char *strtok(char *str, const char *delims);
char *strstr(const char *str1, const char *str2);
char *strrchr(const char *str, int chr);
char *strpbrk(const char *str1, const char *str2);
size_t strspn(const char *str1, const char *str2);
size_t strcspn(const char *str1, const char *str2);
size_t strlen(const char *str);
/* only addition on top of libc */
size_t strnlen(const char *str, size_t num);
void *memset(void *ptr, int value, size_t num);
void *memchr(const void *ptr, int val, size_t num);
void *memcpy(void *dst, const void *src, size_t num);
void *memmove(void *dst, const void *src, size_t num);
int memcmp(const void *ptr1, const void *ptr2, size_t num);
/* Honorable mentions:
*
* char *strerror(int err);
* int strcoll(const char *str1, const char *str2);
* int strxfrm(char *dest, const char *src, size_t num);
*
*/
/* provide macros for builtin functions. The compiler is always allowed to
* replace a __builtin_* with a regular call to the function, which is why we
* still need to define the functions.
*
* Does mean we can't take the address of any of these, but I suppose that's not
* an issue.
*/
#if __has_builtin(__builtin_memcpy)
#define memcpy(dst, src, num) __builtin_memcpy(dst, src, num)
#endif
#if __has_builtin(__builtin_memmove)
#define memmove(dst, src, num) __builtin_memmove(dst, src, num)
#endif
#if __has_builtin(__builtin_strcpy)
#define strcpy(dst, src) __builtin_strcpy(dst, src)
#endif
#if __has_builtin(__builtin_strncpy)
#define strncpy(dst, src, num) __builtin_strncpy(dst, src, num)
#endif
#if __has_builtin(__builtin_strcat)
#define strcat(dst, src) __builtin_strcat(dst, src)
#endif
#if __has_builtin(__builtin_strncat)
#define strncat(dst, src, num) __builtin_strncat(dst, src, num)
#endif
#if __has_builtin(__builtin_memcmp)
#define memcmp(p1, p2, num) __builtin_memcmp(p1, p2, num)
#endif
#if __has_builtin(__builtin_strcmp)
#define strcmp(s1, s2) __builtin_strcmp(s1, s2)
#endif
#if __has_builtin(__builtin_strncmp)
#define strncmp(s1, s2, num) __builtin_strncmp(s1, s2, num)
#endif
#if __has_builtin(__builtin_strncmp)
#define memchr(ptr, val, num) __builtin_memchr(ptr, val, num)
#endif
#if __has_builtin(__builtin_strchr)
#define strchr(str, chr) __builtin_strchr(str, chr)
#endif
#if __has_builtin(__builtin_strcspn)
#define strcspn(s1, s2) __builtin_strcspn(s1, s2)
#endif
#if __has_builtin(__builtin_strpbrk)
#define strpbrk(s1, s2) __builtin_strpbrk(s1, s2)
#endif
#if __has_builtin(__builtin_strchr)
#define strrchr(s1, s2) __builtin_strrchr(s1, s2)
#endif
#if __has_builtin(__builtin_strspn)
#define strspn(s1, s2) __builtin_strspn(s1, s2)
#endif
#if __has_builtin(__builtin_strstr)
#define strstr(s1, s2) __builtin_strstr(s1, s2)
#endif
#if __has_builtin(__builtin_strtok)
#define strtok(s1, s2) __builtin_strtok(s1, s2)
#endif
#if __has_builtin(__builtin_memset)
#define memset(p, v, n) __builtin_memset(p, v, n)
#endif
#if __has_builtin(__builtin_strlen)
#define strlen(s) __builtin_strlen(s)
#endif
#endif /* APOS_STRING_H */
|
