strnlen

Name

strnlen - determine the length of a fixed-size string

Library

libc.lib

Synopsis

#include <string.h>

size_t strlen (const char *s, size_t maxlen);

Return values

The strnlen function returns strlen(s), if that is less than maxlen, or maxlen if there is no "\0" character among the first maxlen characters pointed to by s.

Detailed description

The strnlen function returns the number of characters in the string pointed to by s, not including the terminating "\0" character, but at most maxlen. In doing this, strnlen looks only at the first maxlen characters at s and never beyond s+maxlen. s.

Examples

#include <string.h>
#include <stdio.h>
int main()
{
    char one[50];
    int ret;
    strcpy(one,"abcdef");
    ret = strnlen(one,5);
    printf("Length obtained using strnlen = %d\n",ret);
    ret = strnlen(one,10);
    printf("Length obtained using strnlen = %d\n",ret);
}

Output

Length obtained using strnlen = 5
Length obtained using strnlen = 6

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