1 files changed, 33 insertions, 0 deletions
diff --git a/sys/fmtio/gargb.x b/sys/fmtio/gargb.x
new file mode 100644
index 00000000..82d9e0cb
--- /dev/null
+++ b/sys/fmtio/gargb.x
@@ -0,0 +1,33 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<ctype.h>
+
+# GARGB -- Interpret the next token in the input as a boolean quantity
+# (token "y...." or "n....").
+
+procedure gargb (bval)
+
+bool	bval
+include	"scan.com"
+
+begin
+	if (sc_stopscan)
+	    return
+
+	while (IS_WHITE (sc_scanbuf[sc_ip]))
+	    sc_ip = sc_ip + 1
+
+	switch (sc_scanbuf[sc_ip]) {
+	case 'Y','y':
+	    bval = true
+	case 'N','n':
+	    bval = false
+	default:
+	    sc_stopscan = true
+	    return
+	}
+
+	while (IS_ALPHA(sc_scanbuf[sc_ip]) || sc_scanbuf[sc_ip] == '_')
+	    sc_ip = sc_ip + 1
+	sc_ntokens = sc_ntokens + 1
+end