1 files changed, 20 insertions, 0 deletions
diff --git a/sys/fmtio/strldx.x b/sys/fmtio/strldx.x
new file mode 100644
index 00000000..0087a208
--- /dev/null
+++ b/sys/fmtio/strldx.x
@@ -0,0 +1,20 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# STRLDX -- Return the index of the last occurrence of a character in a
+# string.
+
+int procedure strldx (ch, str)
+
+char	ch, str[ARB]
+int	ip, offset
+
+begin
+	offset = 0
+	do ip = 1, ARB
+	    if (str[ip] == EOS)
+		break
+	    else if (str[ip] == ch)
+		offset = ip
+
+	return (offset)
+end