strnlen()
QNX SDP8.0C Library ReferenceAPIDeveloper
Compute the length of a string, to a maximum number of bytes
Synopsis:
#include <string.h>
size_t strnlen( const char * s,
size_t maxlen );
Arguments:
- s
- The string whose length you want to calculate.
- maxlen
- The maximum length to check.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The strnlen() function computes the length of the string pointed to by s, not including the terminating null character, up to a maximum of maxlen bytes. The function doesn't check any more than the first maxlen bytes.
Returns:
The minimum of maxlen and the number of characters that precede the terminating null character.
Examples:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main( void )
{
printf( "%d\n", strnlen( "Howdy", 10 ) );
printf( "%d\n", strnlen( "Hello world\n", 5 ) );
printf( "%d\n", strnlen( "", 10 ) );
return EXIT_SUCCESS;
}
produces the output:
5
5
0
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
Page updated: