1 files changed, 103 insertions, 0 deletions
diff --git a/vendor/github.com/robertkrimen/otto/value_string.go b/vendor/github.com/robertkrimen/otto/value_string.go
new file mode 100644
index 000000000..0fbfd6b25
--- /dev/null
+++ b/vendor/github.com/robertkrimen/otto/value_string.go
@@ -0,0 +1,103 @@
+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))
+}