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.

1 files changed, 324 insertions, 0 deletions

diff --git a/vendor/github.com/robertkrimen/otto/value_number.go b/vendor/github.com/robertkrimen/otto/value_number.go
new file mode 100644
index 000000000..870bf115b
--- /dev/null
+++ b/vendor/github.com/robertkrimen/otto/value_number.go
@@ -0,0 +1,324 @@
+package otto
+
+import (
+	"fmt"
+	"math"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var stringToNumberParseInteger = regexp.MustCompile(`^(?:0[xX])`)
+
+func parseNumber(value string) float64 {
+	value = strings.TrimSpace(value)
+
+	if value == "" {
+		return 0
+	}
+
+	parseFloat := false
+	if strings.IndexRune(value, '.') != -1 {
+		parseFloat = true
+	} else if stringToNumberParseInteger.MatchString(value) {
+		parseFloat = false
+	} else {
+		parseFloat = true
+	}
+
+	if parseFloat {
+		number, err := strconv.ParseFloat(value, 64)
+		if err != nil && err.(*strconv.NumError).Err != strconv.ErrRange {
+			return math.NaN()
+		}
+		return number
+	}
+
+	number, err := strconv.ParseInt(value, 0, 64)
+	if err != nil {
+		return math.NaN()
+	}
+	return float64(number)
+}
+
+func (value Value) float64() float64 {
+	switch value.kind {
+	case valueUndefined:
+		return math.NaN()
+	case valueNull:
+		return 0
+	}
+	switch value := value.value.(type) {
+	case bool:
+		if value {
+			return 1
+		}
+		return 0
+	case int:
+		return float64(value)
+	case int8:
+		return float64(value)
+	case int16:
+		return float64(value)
+	case int32:
+		return float64(value)
+	case int64:
+		return float64(value)
+	case uint:
+		return float64(value)
+	case uint8:
+		return float64(value)
+	case uint16:
+		return float64(value)
+	case uint32:
+		return float64(value)
+	case uint64:
+		return float64(value)
+	case float64:
+		return value
+	case string:
+		return parseNumber(value)
+	case *_object:
+		return value.DefaultValue(defaultValueHintNumber).float64()
+	}
+	panic(fmt.Errorf("toFloat(%T)", value.value))
+}
+
+const (
+	float_2_64   float64 = 18446744073709551616.0
+	float_2_63   float64 = 9223372036854775808.0
+	float_2_32   float64 = 4294967296.0
+	float_2_31   float64 = 2147483648.0
+	float_2_16   float64 = 65536.0
+	integer_2_32 int64   = 4294967296
+	integer_2_31 int64   = 2146483648
+	sqrt1_2      float64 = math.Sqrt2 / 2
+)
+
+const (
+	maxInt8   = math.MaxInt8
+	minInt8   = math.MinInt8
+	maxInt16  = math.MaxInt16
+	minInt16  = math.MinInt16
+	maxInt32  = math.MaxInt32
+	minInt32  = math.MinInt32
+	maxInt64  = math.MaxInt64
+	minInt64  = math.MinInt64
+	maxUint8  = math.MaxUint8
+	maxUint16 = math.MaxUint16
+	maxUint32 = math.MaxUint32
+	maxUint64 = math.MaxUint64
+	maxUint   = ^uint(0)
+	minUint   = 0
+	maxInt    = int(^uint(0) >> 1)
+	minInt    = -maxInt - 1
+
+	// int64
+	int64_maxInt    int64 = int64(maxInt)
+	int64_minInt    int64 = int64(minInt)
+	int64_maxInt8   int64 = math.MaxInt8
+	int64_minInt8   int64 = math.MinInt8
+	int64_maxInt16  int64 = math.MaxInt16
+	int64_minInt16  int64 = math.MinInt16
+	int64_maxInt32  int64 = math.MaxInt32
+	int64_minInt32  int64 = math.MinInt32
+	int64_maxUint8  int64 = math.MaxUint8
+	int64_maxUint16 int64 = math.MaxUint16
+	int64_maxUint32 int64 = math.MaxUint32
+
+	// float64
+	float_maxInt    float64 = float64(int(^uint(0) >> 1))
+	float_minInt    float64 = float64(int(-maxInt - 1))
+	float_minUint   float64 = float64(0)
+	float_maxUint   float64 = float64(uint(^uint(0)))
+	float_minUint64 float64 = float64(0)
+	float_maxUint64 float64 = math.MaxUint64
+	float_maxInt64  float64 = math.MaxInt64
+	float_minInt64  float64 = math.MinInt64
+)
+
+func toIntegerFloat(value Value) float64 {
+	float := value.float64()
+	if math.IsInf(float, 0) {
+	} else if math.IsNaN(float) {
+		float = 0
+	} else if float > 0 {
+		float = math.Floor(float)
+	} else {
+		float = math.Ceil(float)
+	}
+	return float
+}
+
+type _numberKind int
+
+const (
+	numberInteger  _numberKind = iota // 3.0 => 3.0
+	numberFloat                       // 3.14159 => 3.0, 1+2**63 > 2**63-1
+	numberInfinity                    // Infinity => 2**63-1
+	numberNaN                         // NaN => 0
+)
+
+type _number struct {
+	kind    _numberKind
+	int64   int64
+	float64 float64
+}
+
+// FIXME
+// http://www.goinggo.net/2013/08/gustavos-ieee-754-brain-teaser.html
+// http://bazaar.launchpad.net/~niemeyer/strepr/trunk/view/6/strepr.go#L160
+func (value Value) number() (number _number) {
+	switch value := value.value.(type) {
+	case int8:
+		number.int64 = int64(value)
+		return
+	case int16:
+		number.int64 = int64(value)
+		return
+	case uint8:
+		number.int64 = int64(value)
+		return
+	case uint16:
+		number.int64 = int64(value)
+		return
+	case uint32:
+		number.int64 = int64(value)
+		return
+	case int:
+		number.int64 = int64(value)
+		return
+	case int64:
+		number.int64 = value
+		return
+	}
+
+	float := value.float64()
+	if float == 0 {
+		return
+	}
+
+	number.kind = numberFloat
+	number.float64 = float
+
+	if math.IsNaN(float) {
+		number.kind = numberNaN
+		return
+	}
+
+	if math.IsInf(float, 0) {
+		number.kind = numberInfinity
+	}
+
+	if float >= float_maxInt64 {
+		number.int64 = math.MaxInt64
+		return
+	}
+
+	if float <= float_minInt64 {
+		number.int64 = math.MinInt64
+		return
+	}
+
+	integer := float64(0)
+	if float > 0 {
+		integer = math.Floor(float)
+	} else {
+		integer = math.Ceil(float)
+	}
+
+	if float == integer {
+		number.kind = numberInteger
+	}
+	number.int64 = int64(float)
+	return
+}
+
+// ECMA 262: 9.5
+func toInt32(value Value) int32 {
+	{
+		switch value := value.value.(type) {
+		case int8:
+			return int32(value)
+		case int16:
+			return int32(value)
+		case int32:
+			return value
+		}
+	}
+	floatValue := value.float64()
+	if math.IsNaN(floatValue) || math.IsInf(floatValue, 0) {
+		return 0
+	}
+	if floatValue == 0 { // This will work for +0 & -0
+		return 0
+	}
+	remainder := math.Mod(floatValue, float_2_32)
+	if remainder > 0 {
+		remainder = math.Floor(remainder)
+	} else {
+		remainder = math.Ceil(remainder) + float_2_32
+	}
+	if remainder > float_2_31 {
+		return int32(remainder - float_2_32)
+	}
+	return int32(remainder)
+}
+
+func toUint32(value Value) uint32 {
+	{
+		switch value := value.value.(type) {
+		case int8:
+			return uint32(value)
+		case int16:
+			return uint32(value)
+		case uint8:
+			return uint32(value)
+		case uint16:
+			return uint32(value)
+		case uint32:
+			return value
+		}
+	}
+	floatValue := value.float64()
+	if math.IsNaN(floatValue) || math.IsInf(floatValue, 0) {
+		return 0
+	}
+	if floatValue == 0 {
+		return 0
+	}
+	remainder := math.Mod(floatValue, float_2_32)
+	if remainder > 0 {
+		remainder = math.Floor(remainder)
+	} else {
+		remainder = math.Ceil(remainder) + float_2_32
+	}
+	return uint32(remainder)
+}
+
+func toUint16(value Value) uint16 {
+	{
+		switch value := value.value.(type) {
+		case int8:
+			return uint16(value)
+		case uint8:
+			return uint16(value)
+		case uint16:
+			return value
+		}
+	}
+	floatValue := value.float64()
+	if math.IsNaN(floatValue) || math.IsInf(floatValue, 0) {
+		return 0
+	}
+	if floatValue == 0 {
+		return 0
+	}
+	remainder := math.Mod(floatValue, float_2_16)
+	if remainder > 0 {
+		remainder = math.Floor(remainder)
+	} else {
+		remainder = math.Ceil(remainder) + float_2_16
+	}
+	return uint16(remainder)
+}