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// 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 strconv
import (
"fmt";
"os";
"strconv";
"testing"
)
type atofTest struct {
in string;
out string;
err *os.Error;
}
var atoftests = []atofTest (
atofTest( "", "0", os.EINVAL ),
atofTest( "1", "1", nil ),
atofTest( "+1", "1", nil ),
atofTest( "1x", "0", os.EINVAL ),
atofTest( "1.1.", "0", os.EINVAL ),
atofTest( "1e23", "1e+23", nil ),
atofTest( "100000000000000000000000", "1e+23", nil ),
atofTest( "1e-100", "1e-100", nil ),
atofTest( "123456700", "1.234567e+08", nil ),
atofTest( "99999999999999974834176", "9.999999999999997e+22", nil ),
atofTest( "100000000000000000000001", "1.0000000000000001e+23", nil ),
atofTest( "100000000000000008388608", "1.0000000000000001e+23", nil ),
atofTest( "100000000000000016777215", "1.0000000000000001e+23", nil ),
atofTest( "100000000000000016777216", "1.0000000000000003e+23", nil ),
atofTest( "-1", "-1", nil ),
atofTest( "-0", "-0", nil ),
atofTest( "1e-20", "1e-20", nil ),
atofTest( "625e-3", "0.625", nil ),
// largest float64
atofTest( "1.7976931348623157e308", "1.7976931348623157e+308", nil ),
atofTest( "-1.7976931348623157e308", "-1.7976931348623157e+308", nil ),
// next float64 - too large
atofTest( "1.7976931348623159e308", "+Inf", os.ERANGE ),
atofTest( "-1.7976931348623159e308", "-Inf", os.ERANGE ),
// the border is ...158079
// borderline - okay
atofTest( "1.7976931348623158e308", "1.7976931348623157e+308", nil ),
atofTest( "-1.7976931348623158e308", "-1.7976931348623157e+308", nil ),
// borderline - too large
atofTest( "1.797693134862315808e308", "+Inf", os.ERANGE ),
atofTest( "-1.797693134862315808e308", "-Inf", os.ERANGE ),
// a little too large
atofTest( "1e308", "1e+308", nil ),
atofTest( "2e308", "+Inf", os.ERANGE ),
atofTest( "1e309", "+Inf", os.ERANGE ),
// way too large
atofTest( "1e310", "+Inf", os.ERANGE ),
atofTest( "-1e310", "-Inf", os.ERANGE ),
atofTest( "1e400", "+Inf", os.ERANGE ),
atofTest( "-1e400", "-Inf", os.ERANGE ),
atofTest( "1e400000", "+Inf", os.ERANGE ),
atofTest( "-1e400000", "-Inf", os.ERANGE ),
// denormalized
atofTest( "1e-305", "1e-305", nil ),
atofTest( "1e-306", "1e-306", nil ),
atofTest( "1e-307", "1e-307", nil ),
atofTest( "1e-308", "1e-308", nil ),
atofTest( "1e-309", "1e-309", nil ),
atofTest( "1e-310", "1e-310", nil ),
atofTest( "1e-322", "1e-322", nil ),
// smallest denormal
atofTest( "5e-324", "5e-324", nil ),
// too small
atofTest( "4e-324", "0", nil ),
// way too small
atofTest( "1e-350", "0", nil ),
atofTest( "1e-400000", "0", nil ),
// try to overflow exponent
atofTest( "1e-4294967296", "0", nil ),
atofTest( "1e+4294967296", "+Inf", os.ERANGE ),
atofTest( "1e-18446744073709551616", "0", nil ),
atofTest( "1e+18446744073709551616", "+Inf", os.ERANGE ),
// Parse errors
atofTest( "1e", "0", os.EINVAL ),
atofTest( "1e-", "0", os.EINVAL ),
atofTest( ".e-1", "0", os.EINVAL ),
)
func testAtof(t *testing.T, opt bool) {
oldopt := strconv.optimize;
strconv.optimize = opt;
for i := 0; i < len(atoftests); i++ {
test := &atoftests[i];
out, err := strconv.Atof64(test.in);
outs := strconv.Ftoa64(out, 'g', -1);
if outs != test.out || err != test.err {
t.Errorf("strconv.Atof64(%v) = %v, %v want %v, %v\n",
test.in, out, err, test.out, test.err);
}
if float64(float32(out)) == out {
out32, err := strconv.Atof32(test.in);
outs := strconv.Ftoa32(out32, 'g', -1);
if outs != test.out || err != test.err {
t.Errorf("strconv.Atof32(%v) = %v, %v want %v, %v # %v\n",
test.in, out32, err, test.out, test.err, out);
}
}
if FloatSize == 64 || float64(float32(out)) == out {
outf, err := strconv.Atof(test.in);
outs := strconv.Ftoa(outf, 'g', -1);
if outs != test.out || err != test.err {
t.Errorf("strconv.Ftoa(%v) = %v, %v want %v, %v # %v\n",
test.in, outf, err, test.out, test.err, out);
}
}
}
strconv.optimize = oldopt;
}
func TestAtof(t *testing.T) {
testAtof(t, true);
}
func TestAtofSlow(t *testing.T) {
testAtof(t, false);
}
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