| 1 | /* Portable version of strnlen. |
| 2 | This function is in the public domain. */ |
| 3 | |
| 4 | /* |
| 5 | |
| 6 | @deftypefn Supplemental size_t strnlen (const char *@var{s}, size_t @var{maxlen}) |
| 7 | |
| 8 | Returns the length of @var{s}, as with @code{strlen}, but never looks |
| 9 | past the first @var{maxlen} characters in the string. If there is no |
| 10 | '\0' character in the first @var{maxlen} characters, returns |
| 11 | @var{maxlen}. |
| 12 | |
| 13 | @end deftypefn |
| 14 | |
| 15 | */ |
| 16 | |
| 17 | #include "config.h" |
| 18 | |
| 19 | #include <stddef.h> |
| 20 | |
| 21 | size_t |
| 22 | strnlen (const char *s, size_t maxlen) |
| 23 | { |
| 24 | size_t i; |
| 25 | |
| 26 | for (i = 0; i < maxlen; ++i) |
| 27 | if (s[i] == '\0') |
| 28 | break; |
| 29 | return i; |
| 30 | } |