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strconv: handle [-+]Infinity in atof

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This is the form as returned by Postgres, as well
as JavaScript.

I've tried and failed to find authorative docs online
about the proper string serialization, if any.

R=golang-dev, gri, r, r, rsc
CC=golang-dev
https://golang.org/cl/4650077
This commit is contained in:
Brad Fitzpatrick 2011-07-11 07:25:45 -07:00
parent d366c36945
commit f19b24a182
2 changed files with 9 additions and 4 deletions
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10
src/pkg/strconv/atof.go
View File

@ -43,11 +43,13 @@ func special(s string) (f float64, ok bool) {
switch { switch {
case equalIgnoreCase(s, "nan"): case equalIgnoreCase(s, "nan"):
return math.NaN(), true return math.NaN(), true
case equalIgnoreCase(s, "-inf"): case equalIgnoreCase(s, "-inf"),
equalIgnoreCase(s, "-infinity"):
return math.Inf(-1), true return math.Inf(-1), true
case equalIgnoreCase(s, "+inf"): case equalIgnoreCase(s, "+inf"),
return math.Inf(1), true equalIgnoreCase(s, "+infinity"),
case equalIgnoreCase(s, "inf"): equalIgnoreCase(s, "inf"),
equalIgnoreCase(s, "infinity"):
return math.Inf(1), true return math.Inf(1), true
} }
return return

3
src/pkg/strconv/atof_test.go
View File

@ -47,6 +47,9 @@ var atoftests = []atofTest{
{"inf", "+Inf", nil}, {"inf", "+Inf", nil},
{"-Inf", "-Inf", nil}, {"-Inf", "-Inf", nil},
{"+INF", "+Inf", nil}, {"+INF", "+Inf", nil},
{"-Infinity", "-Inf", nil},
{"+INFINITY", "+Inf", nil},
{"Infinity", "+Inf", nil},
// largest float64 // largest float64
{"1.7976931348623157e308", "1.7976931348623157e+308", nil}, {"1.7976931348623157e308", "1.7976931348623157e+308", nil},