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 } 31