1 files changed, 26 insertions, 0 deletions
diff --git a/sys/fmtio/gstrcat.x b/sys/fmtio/gstrcat.x
new file mode 100644
index 00000000..d3f3fa94
--- /dev/null
+++ b/sys/fmtio/gstrcat.x
@@ -0,0 +1,26 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# GSTRCAT -- String concatenation.  String STR is appended to OUTSTR.
+
+int procedure gstrcat (str, outstr, maxch)
+
+char	str[ARB], outstr[ARB]
+int	maxch
+
+int	ip, op, n
+
+begin
+	do op = 0, maxch-1
+	    if (outstr[op+1] == EOS)
+		break
+
+	n = maxch - op
+	do ip = 1, n {
+	    outstr[op+ip] = str[ip]
+	    if (str[ip] == EOS)
+		return (op + ip-1)
+	}
+
+	outstr[maxch+1] = EOS
+	return (maxch)
+end