1 files changed, 96 insertions, 0 deletions
diff --git a/src/lib/strconv/testftoa.go b/src/lib/strconv/testftoa.go
new file mode 100644
index 0000000000..2d72bf42e2
--- /dev/null
+++ b/src/lib/strconv/testftoa.go
@@ -0,0 +1,96 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import "strconv"
+
+type Test struct {
+	f float64;
+	fmt byte;
+	prec int;
+	s string;
+}
+
+var tests = []Test {
+	Test{ 1, 'e', 5, "1.00000e+00" },
+	Test{ 1, 'f', 5, "1.00000" },
+	Test{ 1, 'g', 5, "1" },
+	Test{ 1, 'g', -1, "1" },
+
+	Test{ 0, 'e', 5, "0.00000e+00" },
+	Test{ 0, 'f', 5, "0.00000" },
+	Test{ 0, 'g', 5, "0" },
+	Test{ 0, 'g', -1, "0" },
+
+	Test{ -1, 'e', 5, "-1.00000e+00" },
+	Test{ -1, 'f', 5, "-1.00000" },
+	Test{ -1, 'g', 5, "-1" },
+	Test{ -1, 'g', -1, "-1" },
+
+	Test{ 12, 'e', 5, "1.20000e+01" },
+	Test{ 12, 'f', 5, "12.00000" },
+	Test{ 12, 'g', 5, "12" },
+	Test{ 12, 'g', -1, "12" },
+
+	Test{ 123456700, 'e', 5, "1.23457e+08" },
+	Test{ 123456700, 'f', 5, "123456700.00000" },
+	Test{ 123456700, 'g', 5, "1.2346e+08" },
+	Test{ 123456700, 'g', -1, "1.234567e+08" },
+
+	Test{ 1.2345e6, 'e', 5, "1.23450e+06" },
+	Test{ 1.2345e6, 'f', 5, "1234500.00000" },
+	Test{ 1.2345e6, 'g', 5, "1.2345e+06" },
+
+	Test{ 1e23, 'e', 17, "9.99999999999999916e+22" },
+	Test{ 1e23, 'f', 17, "99999999999999991611392.00000000000000000" },
+	Test{ 1e23, 'g', 17, "9.9999999999999992e+22" },
+
+	Test{ 1e23, 'e', -1, "1e+23" },
+	Test{ 1e23, 'f', -1, "100000000000000000000000" },
+	Test{ 1e23, 'g', -1, "1e+23" },
+
+	Test{ 1e23-8.5e6, 'e', 17, "9.99999999999999748e+22" },
+	Test{ 1e23-8.5e6, 'f', 17, "99999999999999974834176.00000000000000000" },
+	Test{ 1e23-8.5e6, 'g', 17, "9.9999999999999975e+22" },
+
+	Test{ 1e23-8.5e6, 'e', -1, "9.999999999999997e+22" },
+	Test{ 1e23-8.5e6, 'f', -1, "99999999999999970000000" },
+	Test{ 1e23-8.5e6, 'g', -1, "9.999999999999997e+22" },
+
+	Test{ 1e23+8.5e6, 'e', 17, "1.00000000000000008e+23" },
+	Test{ 1e23+8.5e6, 'f', 17, "100000000000000008388608.00000000000000000" },
+	Test{ 1e23+8.5e6, 'g', 17, "1.0000000000000001e+23" },
+
+	Test{ 1e23+8.5e6, 'e', -1, "1.0000000000000001e+23" },
+	Test{ 1e23+8.5e6, 'f', -1, "100000000000000010000000" },
+	Test{ 1e23+8.5e6, 'g', -1, "1.0000000000000001e+23" },
+	
+	Test{ 32, 'g', -1, "32" },
+}
+
+func main() {
+	bad := 0;
+	if strconv.floatsize != 32 {
+		panic("floatsize: ", strconv.floatsize);
+	}
+	for i := 0; i < len(tests); i++ {
+		t := &tests[i];
+		s := strconv.ftoa64(t.f, t.fmt, t.prec);
+		if s != t.s {
+			println("test", t.f, string(t.fmt), t.prec, "want", t.s, "got", s);
+			bad++;
+		}
+		if float64(float32(t.f)) == t.f {
+			s := strconv.ftoa32(float32(t.f), t.fmt, t.prec);
+			if s != t.s {
+				println("test32", t.f, string(t.fmt), t.prec, "want", t.s, "got", s);
+				bad++;
+			}
+		}	
+	}
+	if bad != 0 {
+		panic("failed");
+	}
+}