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1 files changed, 37 insertions, 0 deletions

diff --git a/pkg/utilities/nttools/copyone/isdouble.x b/pkg/utilities/nttools/copyone/isdouble.x
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+++ b/pkg/utilities/nttools/copyone/isdouble.x
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+include	<ctype.h>
+include	<mach.h>
+
+# IS_DOUBLE -- Check to see if a real number is actually double precision
+#
+# B.Simon	15-Dec-94	First Code
+
+int procedure is_double (token)
+
+char	token[ARB]	# i: token containing number
+#--
+int	ic, ndigit
+
+begin
+	# Count number of digits in mantissa and look for D exponent
+
+	ndigit = 0
+	for (ic = 1; token[ic] != EOS; ic = ic + 1) {
+	    if (token[ic] == 'D' || token[ic] == 'd') {
+		return (TY_DOUBLE)
+
+	    } else if (token[ic] == 'E' || token[ic] == 'e') { 
+		break
+	    }
+
+	    if (IS_DIGIT(token[ic]))
+		ndigit = ndigit + 1
+	}
+
+	# If no D exponent, set the type according to the number of digits
+
+	if (ndigit > NDIGITS_RP) {
+	    return (TY_DOUBLE)
+	} else {
+	    return (TY_REAL)
+	}
+end