go-pulse/vendor/github.com/robertkrimen/otto/value_string.go
Péter Szilágyi 289b30715d Godeps, vendor: convert dependency management to trash (#3198)
This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.
2016-10-28 19:05:01 +02:00

104 lines
2.5 KiB
Go

package otto
import (
"fmt"
"math"
"regexp"
"strconv"
"unicode/utf16"
)
var matchLeading0Exponent = regexp.MustCompile(`([eE][\+\-])0+([1-9])`) // 1e-07 => 1e-7
// FIXME
// https://code.google.com/p/v8/source/browse/branches/bleeding_edge/src/conversions.cc?spec=svn18082&r=18082
func floatToString(value float64, bitsize int) string {
// TODO Fit to ECMA-262 9.8.1 specification
if math.IsNaN(value) {
return "NaN"
} else if math.IsInf(value, 0) {
if math.Signbit(value) {
return "-Infinity"
}
return "Infinity"
}
exponent := math.Log10(math.Abs(value))
if exponent >= 21 || exponent < -6 {
return matchLeading0Exponent.ReplaceAllString(strconv.FormatFloat(value, 'g', -1, bitsize), "$1$2")
}
return strconv.FormatFloat(value, 'f', -1, bitsize)
}
func numberToStringRadix(value Value, radix int) string {
float := value.float64()
if math.IsNaN(float) {
return "NaN"
} else if math.IsInf(float, 1) {
return "Infinity"
} else if math.IsInf(float, -1) {
return "-Infinity"
}
// FIXME This is very broken
// Need to do proper radix conversion for floats, ...
// This truncates large floats (so bad).
return strconv.FormatInt(int64(float), radix)
}
func (value Value) string() string {
if value.kind == valueString {
switch value := value.value.(type) {
case string:
return value
case []uint16:
return string(utf16.Decode(value))
}
}
if value.IsUndefined() {
return "undefined"
}
if value.IsNull() {
return "null"
}
switch value := value.value.(type) {
case bool:
return strconv.FormatBool(value)
case int:
return strconv.FormatInt(int64(value), 10)
case int8:
return strconv.FormatInt(int64(value), 10)
case int16:
return strconv.FormatInt(int64(value), 10)
case int32:
return strconv.FormatInt(int64(value), 10)
case int64:
return strconv.FormatInt(value, 10)
case uint:
return strconv.FormatUint(uint64(value), 10)
case uint8:
return strconv.FormatUint(uint64(value), 10)
case uint16:
return strconv.FormatUint(uint64(value), 10)
case uint32:
return strconv.FormatUint(uint64(value), 10)
case uint64:
return strconv.FormatUint(value, 10)
case float32:
if value == 0 {
return "0" // Take care not to return -0
}
return floatToString(float64(value), 32)
case float64:
if value == 0 {
return "0" // Take care not to return -0
}
return floatToString(value, 64)
case []uint16:
return string(utf16.Decode(value))
case string:
return value
case *_object:
return value.DefaultValue(defaultValueHintString).string()
}
panic(fmt.Errorf("%v.string( %T)", value.value, value.value))
}