| /* |
| |
| @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, @ |
| size_t @var{n}) |
| |
| This function searches memory starting at @code{*@var{s}} for the |
| character @var{c}. The search only ends with the first occurrence of |
| @var{c}, or after @var{length} characters; in particular, a null |
| character does not terminate the search. If the character @var{c} is |
| found within @var{length} characters of @code{*@var{s}}, a pointer |
| to the character is returned. If @var{c} is not found, then @code{NULL} is |
| returned. |
| |
| @end deftypefn |
| |
| */ |
| |
| #include <ansidecl.h> |
| #include <stddef.h> |
| |
| PTR |
| memchr (register const PTR src_void, int c, size_t length) |
| { |
| const unsigned char *src = (const unsigned char *)src_void; |
| |
| while (length-- > 0) |
| { |
| if (*src == c) |
| return (PTR)src; |
| src++; |
| } |
| return NULL; |
| } |