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comparison libiberty/memchr.c @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children f6334be47118
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-1:000000000000 0:a06113de4d67
1 /*
2
3 @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n})
4
5 This function searches memory starting at @code{*@var{s}} for the
6 character @var{c}. The search only ends with the first occurrence of
7 @var{c}, or after @var{length} characters; in particular, a null
8 character does not terminate the search. If the character @var{c} is
9 found within @var{length} characters of @code{*@var{s}}, a pointer
10 to the character is returned. If @var{c} is not found, then @code{NULL} is
11 returned.
12
13 @end deftypefn
14
15 */
16
17 #include <ansidecl.h>
18 #include <stddef.h>
19
20 PTR
21 memchr (register const PTR src_void, int c, size_t length)
22 {
23 const unsigned char *src = (const unsigned char *)src_void;
24
25 while (length-- > 0)
26 {
27 if (*src == c)
28 return (PTR)src;
29 src++;
30 }
31 return NULL;
32 }