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
|
/*
FUNCTION
<<strxfrm>>---transform string
INDEX
strxfrm
ANSI_SYNOPSIS
#include <string.h>
size_t strxfrm(char *restrict <[s1]>, const char *restrict <[s2]>,
size_t <[n]>);
TRAD_SYNOPSIS
#include <string.h>
size_t strxfrm(<[s1]>, <[s2]>, <[n]>);
char *<[s1]>;
char *<[s2]>;
size_t <[n]>;
DESCRIPTION
This function transforms the string pointed to by <[s2]> and
places the resulting string into the array pointed to by
<[s1]>. The transformation is such that if the <<strcmp>>
function is applied to the two transformed strings, it returns
a value greater than, equal to, or less than zero,
correspoinding to the result of a <<strcoll>> function applied
to the same two original strings.
No more than <[n]> characters are placed into the resulting
array pointed to by <[s1]>, including the terminating null
character. If <[n]> is zero, <[s1]> may be a null pointer. If
copying takes place between objects that overlap, the behavior
is undefined.
With a C locale, this function just copies.
RETURNS
The <<strxfrm>> function returns the length of the transformed string
(not including the terminating null character). If the value returned
is <[n]> or more, the contents of the array pointed to by
<[s1]> are indeterminate.
PORTABILITY
<<strxfrm>> is ANSI C.
<<strxfrm>> requires no supporting OS subroutines.
QUICKREF
strxfrm ansi pure
*/
#include <string.h>
size_t
_DEFUN (strxfrm, (s1, s2, n),
char *__restrict s1 _AND
_CONST char *__restrict s2 _AND
size_t n)
{
size_t res;
res = 0;
while (n-- > 0)
{
if ((*s1++ = *s2++) != '\0')
++res;
else
return res;
}
while (*s2)
{
++s2;
++res;
}
return res;
}
|
