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strncmp
[character string compare]

    SYNOPSIS
    #include <string.h>
    int strncmp(const char *a, const char *b, size_t length);

DESCRIPTION
strncmp compares up to length characters from the string at a to the string at b.

RETURNS
If *a sorts lexicographically after *b, strncmp returns a number greater than zero. If the two strings are equivalent, strncmp returns zero. If *a sorts lexicographically before *b, strncmp returns a number less than zero.

COMPLIANCE
strncmp is ANSI C.

strncmp requires no supporting OS subroutines.