1 files changed, 20 insertions, 0 deletions
diff --git a/sys/fmtio/strncmp.x b/sys/fmtio/strncmp.x
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--- /dev/null
+++ b/sys/fmtio/strncmp.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# STRNCMP -- Compare the first N characters of two strings.  A negative value
+# is returned if S1 < S2, 0 if S1 == S2, and a positive value if S1 > S2.
+
+int procedure strncmp (s1, s2, n)
+
+char	s1[ARB], s2[ARB]		# strings to be compared
+int	n				# number of chars to compare
+int	i
+
+begin
+	do i = 1, n
+	    if (s1[i] != s2[i])
+		return (s1[i] - s2[i])
+	    else if (s1[i] == EOS)
+		return (0)
+
+	return (0)
+end