2008-11-17 13:34:03 -07:00
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "strconv"
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type Test struct {
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in string;
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out string;
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}
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var tests = []Test {
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Test{ "1", "1" },
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Test{ "1e23", "1e+23" },
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Test{ "100000000000000000000000", "1e+23" },
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Test{ "1e-100", "1e-100" },
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Test{ "123456700", "1.234567e+08" },
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Test{ "99999999999999974834176", "9.999999999999997e+22" },
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Test{ "100000000000000000000001", "1.0000000000000001e+23" },
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Test{ "100000000000000008388608", "1.0000000000000001e+23" },
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Test{ "100000000000000016777215", "1.0000000000000001e+23" },
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Test{ "100000000000000016777216", "1.0000000000000003e+23" },
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Test{ "-1", "-1" },
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Test{ "-0", "0" },
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2008-11-17 18:22:51 -07:00
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Test{ "1e-20", "1e-20" },
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// largest float64
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Test{ "1.7976931348623157e308", "1.7976931348623157e+308" },
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Test{ "-1.7976931348623157e308", "-1.7976931348623157e+308" },
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// next float64 - too large
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Test{ "1.7976931348623159e308", "+Inf" },
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Test{ "-1.7976931348623159e308", "-Inf" },
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// the border is ...158079
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// borderline - okay
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Test{ "1.7976931348623158e308", "1.7976931348623157e+308" },
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Test{ "-1.7976931348623158e308", "-1.7976931348623157e+308" },
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// borderline - too large
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Test{ "1.797693134862315808e308", "+Inf" },
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Test{ "-1.797693134862315808e308", "-Inf" },
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// a little too large
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Test{ "1e308", "1e+308" },
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Test{ "2e308", "+Inf" },
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Test{ "1e309", "+Inf" },
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// way too large
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Test{ "1e310", "+Inf" },
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Test{ "-1e310", "-Inf" },
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Test{ "1e400", "+Inf" },
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Test{ "-1e400", "-Inf" },
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Test{ "1e400000", "+Inf" },
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Test{ "-1e400000", "-Inf" },
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// denormalized
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Test{ "1e-305", "1e-305" },
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Test{ "1e-306", "1e-306" },
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Test{ "1e-307", "1e-307" },
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Test{ "1e-308", "1e-308" },
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Test{ "1e-309", "1e-309" },
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Test{ "1e-310", "1e-310" },
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Test{ "1e-322", "1e-322" },
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// smallest denormal
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Test{ "5e-324", "5e-324" },
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// too small
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Test{ "4e-324", "0" },
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// way too small
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Test{ "1e-350", "0" },
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Test{ "1e-400000", "0" },
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// try to overflow exponent
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Test{ "1e-4294967296", "0" },
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Test{ "1e+4294967296", "+Inf" },
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Test{ "1e-18446744073709551616", "0" },
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Test{ "1e+18446744073709551616", "+Inf" },
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// Parse errors
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Test{ "1e", "error" },
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Test{ "1e-", "error" },
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Test{ ".e-1", "error" },
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2008-11-17 13:34:03 -07:00
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}
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func main() {
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bad := 0;
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for i := 0; i < len(tests); i++ {
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t := &tests[i];
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f, overflow, ok := strconv.atof64(t.in);
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2008-11-17 18:22:51 -07:00
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if !ok && t.out == "error" {
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continue;
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}
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2008-11-17 13:34:03 -07:00
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if !ok {
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2008-11-17 18:22:51 -07:00
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panicln("test:", t.in, "failed to parse");
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}
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if overflow && !sys.isInf(f, 0) {
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panicln("overflow but not inf:", t.in, f);
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}
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if sys.isInf(f, 0) && !overflow {
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panicln("inf but not overflow:", t.in, f);
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2008-11-17 13:34:03 -07:00
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}
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s := strconv.ftoa64(f, 'g', -1);
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if s != t.out {
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println("test", t.in, "want", t.out, "got", s);
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bad++;
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}
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}
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if bad != 0 {
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panic("failed");
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}
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}
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