strncmp()

Compare two strings, up to a given length

Synopsis:

#include <string.h>

int strncmp( const char* s1,
             const char* s2,
             size_t n );

Library:

libc

Description:

The strncmp() function compares no more than n characters from the string pointed to by s1 to the string pointed to by s2.

Returns:

< 0: s1 is less than s2.
0: s1 is equal to s2.
> 0: s1 is greater than s2.

Examples:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main( void )
  {
    printf( "%d\n", strncmp( "abcdef", "abcDEF", 10 ) );
    printf( "%d\n", strncmp( "abcdef", "abcDEF",  6 ) );
    printf( "%d\n", strncmp( "abcdef", "abcDEF",  3 ) );
    printf( "%d\n", strncmp( "abcdef", "abcDEF",  0 ) );
    return EXIT_SUCCESS;
  }

produces the output:

Classification:

ANSI

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes