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Synopsis:
    #include <string.h>
    size_t strlen( const char *s );
    size_t _fstrlen( const char __far *s );

Description:
    The strlen and _fstrlen functions compute the length of the string
    pointed to by s.

    The _fstrlen function is a data model independent form of the strlen
    function that accepts far pointer arguments.  It is most useful in mixed
    memory model applications.

Returns:
    The strlen and _fstrlen functions return the number of characters that
    precede the terminating null character.

Example:
    #include <stdio.h>
    #include <string.h>

    void main()
      {
        printf( "%d\n", strlen( "Howdy" ) );
        printf( "%d\n", strlen( "Hello world\n" ) );
        printf( "%d\n", strlen( "" ) );
      }

    produces the following:

    5
    12
    0

Classification:
    strlen is ANSI, _fstrlen is not ANSI

Systems:
     strlen - All

    _fstrlen - All