577 lines
15 KiB
Go
577 lines
15 KiB
Go
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package goja
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import (
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"errors"
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"io"
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"math"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"unicode/utf8"
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"github.com/dop251/goja/unistring"
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)
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const hexUpper = "0123456789ABCDEF"
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var (
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parseFloatRegexp = regexp.MustCompile(`^([+-]?(?:Infinity|[0-9]*\.?[0-9]*(?:[eE][+-]?[0-9]+)?))`)
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)
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func (r *Runtime) builtin_isNaN(call FunctionCall) Value {
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if math.IsNaN(call.Argument(0).ToFloat()) {
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return valueTrue
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} else {
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return valueFalse
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}
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}
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func (r *Runtime) builtin_parseInt(call FunctionCall) Value {
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str := call.Argument(0).toString().toTrimmedUTF8()
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radix := int(toInt32(call.Argument(1)))
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v, _ := parseInt(str, radix)
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return v
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}
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func (r *Runtime) builtin_parseFloat(call FunctionCall) Value {
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m := parseFloatRegexp.FindStringSubmatch(call.Argument(0).toString().toTrimmedUTF8())
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if len(m) == 2 {
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if s := m[1]; s != "" && s != "+" && s != "-" {
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switch s {
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case "+", "-":
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case "Infinity", "+Infinity":
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return _positiveInf
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case "-Infinity":
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return _negativeInf
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default:
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f, err := strconv.ParseFloat(s, 64)
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if err == nil || isRangeErr(err) {
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return floatToValue(f)
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}
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}
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}
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}
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return _NaN
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}
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func (r *Runtime) builtin_isFinite(call FunctionCall) Value {
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f := call.Argument(0).ToFloat()
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if math.IsNaN(f) || math.IsInf(f, 0) {
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return valueFalse
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}
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return valueTrue
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}
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func (r *Runtime) _encode(uriString String, unescaped *[256]bool) String {
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reader := uriString.Reader()
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utf8Buf := make([]byte, utf8.UTFMax)
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needed := false
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l := 0
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for {
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rn, _, err := reader.ReadRune()
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if err != nil {
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if err != io.EOF {
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panic(r.newError(r.getURIError(), "Malformed URI"))
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}
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break
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}
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if rn >= utf8.RuneSelf {
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needed = true
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l += utf8.EncodeRune(utf8Buf, rn) * 3
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} else if !unescaped[rn] {
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needed = true
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l += 3
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} else {
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l++
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}
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}
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if !needed {
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return uriString
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}
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buf := make([]byte, l)
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i := 0
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reader = uriString.Reader()
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for {
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rn, _, err := reader.ReadRune()
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if err == io.EOF {
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break
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}
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if rn >= utf8.RuneSelf {
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n := utf8.EncodeRune(utf8Buf, rn)
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for _, b := range utf8Buf[:n] {
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buf[i] = '%'
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buf[i+1] = hexUpper[b>>4]
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buf[i+2] = hexUpper[b&15]
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i += 3
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}
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} else if !unescaped[rn] {
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buf[i] = '%'
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buf[i+1] = hexUpper[rn>>4]
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buf[i+2] = hexUpper[rn&15]
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i += 3
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} else {
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buf[i] = byte(rn)
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i++
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}
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}
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return asciiString(buf)
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}
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func (r *Runtime) _decode(sv String, reservedSet *[256]bool) String {
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s := sv.String()
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hexCount := 0
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for i := 0; i < len(s); {
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switch s[i] {
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case '%':
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if i+2 >= len(s) || !ishex(s[i+1]) || !ishex(s[i+2]) {
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panic(r.newError(r.getURIError(), "Malformed URI"))
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}
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c := unhex(s[i+1])<<4 | unhex(s[i+2])
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if !reservedSet[c] {
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hexCount++
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}
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i += 3
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default:
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i++
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}
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}
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if hexCount == 0 {
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return sv
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}
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t := make([]byte, len(s)-hexCount*2)
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j := 0
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isUnicode := false
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for i := 0; i < len(s); {
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ch := s[i]
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switch ch {
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case '%':
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c := unhex(s[i+1])<<4 | unhex(s[i+2])
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if reservedSet[c] {
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t[j] = s[i]
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t[j+1] = s[i+1]
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t[j+2] = s[i+2]
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j += 3
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} else {
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t[j] = c
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if c >= utf8.RuneSelf {
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isUnicode = true
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}
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j++
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}
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i += 3
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default:
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if ch >= utf8.RuneSelf {
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isUnicode = true
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}
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t[j] = ch
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j++
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i++
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}
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}
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if !isUnicode {
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return asciiString(t)
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}
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us := make([]rune, 0, len(s))
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for len(t) > 0 {
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rn, size := utf8.DecodeRune(t)
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if rn == utf8.RuneError {
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if size != 3 || t[0] != 0xef || t[1] != 0xbf || t[2] != 0xbd {
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panic(r.newError(r.getURIError(), "Malformed URI"))
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}
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}
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us = append(us, rn)
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t = t[size:]
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}
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return unicodeStringFromRunes(us)
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}
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func ishex(c byte) bool {
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switch {
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case '0' <= c && c <= '9':
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return true
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case 'a' <= c && c <= 'f':
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return true
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case 'A' <= c && c <= 'F':
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return true
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}
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return false
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}
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func unhex(c byte) byte {
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switch {
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case '0' <= c && c <= '9':
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return c - '0'
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case 'a' <= c && c <= 'f':
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return c - 'a' + 10
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case 'A' <= c && c <= 'F':
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return c - 'A' + 10
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}
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return 0
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}
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func (r *Runtime) builtin_decodeURI(call FunctionCall) Value {
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uriString := call.Argument(0).toString()
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return r._decode(uriString, &uriReservedHash)
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}
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func (r *Runtime) builtin_decodeURIComponent(call FunctionCall) Value {
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uriString := call.Argument(0).toString()
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return r._decode(uriString, &emptyEscapeSet)
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}
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func (r *Runtime) builtin_encodeURI(call FunctionCall) Value {
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uriString := call.Argument(0).toString()
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return r._encode(uriString, &uriReservedUnescapedHash)
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}
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func (r *Runtime) builtin_encodeURIComponent(call FunctionCall) Value {
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uriString := call.Argument(0).toString()
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return r._encode(uriString, &uriUnescaped)
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}
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func (r *Runtime) builtin_escape(call FunctionCall) Value {
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s := call.Argument(0).toString()
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var sb strings.Builder
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l := s.Length()
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for i := 0; i < l; i++ {
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r := s.CharAt(i)
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if r >= 'A' && r <= 'Z' || r >= 'a' && r <= 'z' || r >= '0' && r <= '9' ||
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r == '@' || r == '*' || r == '_' || r == '+' || r == '-' || r == '.' || r == '/' {
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sb.WriteByte(byte(r))
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} else if r <= 0xff {
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sb.WriteByte('%')
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sb.WriteByte(hexUpper[r>>4])
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sb.WriteByte(hexUpper[r&0xf])
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} else {
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sb.WriteString("%u")
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sb.WriteByte(hexUpper[r>>12])
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sb.WriteByte(hexUpper[(r>>8)&0xf])
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sb.WriteByte(hexUpper[(r>>4)&0xf])
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sb.WriteByte(hexUpper[r&0xf])
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}
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}
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return asciiString(sb.String())
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}
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func (r *Runtime) builtin_unescape(call FunctionCall) Value {
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s := call.Argument(0).toString()
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l := s.Length()
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var asciiBuf []byte
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var unicodeBuf []uint16
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_, u := devirtualizeString(s)
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unicode := u != nil
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if unicode {
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unicodeBuf = make([]uint16, 1, l+1)
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unicodeBuf[0] = unistring.BOM
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} else {
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asciiBuf = make([]byte, 0, l)
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}
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for i := 0; i < l; {
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r := s.CharAt(i)
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if r == '%' {
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if i <= l-6 && s.CharAt(i+1) == 'u' {
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c0 := s.CharAt(i + 2)
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c1 := s.CharAt(i + 3)
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c2 := s.CharAt(i + 4)
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c3 := s.CharAt(i + 5)
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if c0 <= 0xff && ishex(byte(c0)) &&
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c1 <= 0xff && ishex(byte(c1)) &&
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c2 <= 0xff && ishex(byte(c2)) &&
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c3 <= 0xff && ishex(byte(c3)) {
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r = uint16(unhex(byte(c0)))<<12 |
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uint16(unhex(byte(c1)))<<8 |
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uint16(unhex(byte(c2)))<<4 |
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uint16(unhex(byte(c3)))
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i += 5
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goto out
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}
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}
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if i <= l-3 {
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c0 := s.CharAt(i + 1)
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c1 := s.CharAt(i + 2)
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if c0 <= 0xff && ishex(byte(c0)) &&
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c1 <= 0xff && ishex(byte(c1)) {
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r = uint16(unhex(byte(c0))<<4 | unhex(byte(c1)))
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i += 2
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}
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}
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}
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out:
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if r >= utf8.RuneSelf && !unicode {
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unicodeBuf = make([]uint16, 1, l+1)
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unicodeBuf[0] = unistring.BOM
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for _, b := range asciiBuf {
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unicodeBuf = append(unicodeBuf, uint16(b))
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}
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asciiBuf = nil
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unicode = true
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}
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if unicode {
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unicodeBuf = append(unicodeBuf, r)
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} else {
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asciiBuf = append(asciiBuf, byte(r))
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}
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i++
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}
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if unicode {
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return unicodeString(unicodeBuf)
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}
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return asciiString(asciiBuf)
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}
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func createGlobalObjectTemplate() *objectTemplate {
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t := newObjectTemplate()
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t.protoFactory = func(r *Runtime) *Object {
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return r.global.ObjectPrototype
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}
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t.putStr("Object", func(r *Runtime) Value { return valueProp(r.getObject(), true, false, true) })
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t.putStr("Function", func(r *Runtime) Value { return valueProp(r.getFunction(), true, false, true) })
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t.putStr("Array", func(r *Runtime) Value { return valueProp(r.getArray(), true, false, true) })
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t.putStr("String", func(r *Runtime) Value { return valueProp(r.getString(), true, false, true) })
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t.putStr("Number", func(r *Runtime) Value { return valueProp(r.getNumber(), true, false, true) })
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t.putStr("BigInt", func(r *Runtime) Value { return valueProp(r.getBigInt(), true, false, true) })
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t.putStr("RegExp", func(r *Runtime) Value { return valueProp(r.getRegExp(), true, false, true) })
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t.putStr("Date", func(r *Runtime) Value { return valueProp(r.getDate(), true, false, true) })
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t.putStr("Boolean", func(r *Runtime) Value { return valueProp(r.getBoolean(), true, false, true) })
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t.putStr("Proxy", func(r *Runtime) Value { return valueProp(r.getProxy(), true, false, true) })
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t.putStr("Reflect", func(r *Runtime) Value { return valueProp(r.getReflect(), true, false, true) })
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t.putStr("Error", func(r *Runtime) Value { return valueProp(r.getError(), true, false, true) })
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t.putStr("AggregateError", func(r *Runtime) Value { return valueProp(r.getAggregateError(), true, false, true) })
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t.putStr("TypeError", func(r *Runtime) Value { return valueProp(r.getTypeError(), true, false, true) })
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t.putStr("ReferenceError", func(r *Runtime) Value { return valueProp(r.getReferenceError(), true, false, true) })
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t.putStr("SyntaxError", func(r *Runtime) Value { return valueProp(r.getSyntaxError(), true, false, true) })
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t.putStr("RangeError", func(r *Runtime) Value { return valueProp(r.getRangeError(), true, false, true) })
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t.putStr("EvalError", func(r *Runtime) Value { return valueProp(r.getEvalError(), true, false, true) })
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t.putStr("URIError", func(r *Runtime) Value { return valueProp(r.getURIError(), true, false, true) })
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t.putStr("GoError", func(r *Runtime) Value { return valueProp(r.getGoError(), true, false, true) })
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t.putStr("eval", func(r *Runtime) Value { return valueProp(r.getEval(), true, false, true) })
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t.putStr("Math", func(r *Runtime) Value { return valueProp(r.getMath(), true, false, true) })
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t.putStr("JSON", func(r *Runtime) Value { return valueProp(r.getJSON(), true, false, true) })
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addTypedArrays(t)
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t.putStr("Symbol", func(r *Runtime) Value { return valueProp(r.getSymbol(), true, false, true) })
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t.putStr("WeakSet", func(r *Runtime) Value { return valueProp(r.getWeakSet(), true, false, true) })
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t.putStr("WeakMap", func(r *Runtime) Value { return valueProp(r.getWeakMap(), true, false, true) })
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t.putStr("Map", func(r *Runtime) Value { return valueProp(r.getMap(), true, false, true) })
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t.putStr("Set", func(r *Runtime) Value { return valueProp(r.getSet(), true, false, true) })
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t.putStr("Promise", func(r *Runtime) Value { return valueProp(r.getPromise(), true, false, true) })
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t.putStr("globalThis", func(r *Runtime) Value { return valueProp(r.globalObject, true, false, true) })
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t.putStr("NaN", func(r *Runtime) Value { return valueProp(_NaN, false, false, false) })
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t.putStr("undefined", func(r *Runtime) Value { return valueProp(_undefined, false, false, false) })
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t.putStr("Infinity", func(r *Runtime) Value { return valueProp(_positiveInf, false, false, false) })
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t.putStr("isNaN", func(r *Runtime) Value { return r.methodProp(r.builtin_isNaN, "isNaN", 1) })
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t.putStr("parseInt", func(r *Runtime) Value { return valueProp(r.getParseInt(), true, false, true) })
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t.putStr("parseFloat", func(r *Runtime) Value { return valueProp(r.getParseFloat(), true, false, true) })
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t.putStr("isFinite", func(r *Runtime) Value { return r.methodProp(r.builtin_isFinite, "isFinite", 1) })
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t.putStr("decodeURI", func(r *Runtime) Value { return r.methodProp(r.builtin_decodeURI, "decodeURI", 1) })
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t.putStr("decodeURIComponent", func(r *Runtime) Value { return r.methodProp(r.builtin_decodeURIComponent, "decodeURIComponent", 1) })
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t.putStr("encodeURI", func(r *Runtime) Value { return r.methodProp(r.builtin_encodeURI, "encodeURI", 1) })
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t.putStr("encodeURIComponent", func(r *Runtime) Value { return r.methodProp(r.builtin_encodeURIComponent, "encodeURIComponent", 1) })
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t.putStr("escape", func(r *Runtime) Value { return r.methodProp(r.builtin_escape, "escape", 1) })
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t.putStr("unescape", func(r *Runtime) Value { return r.methodProp(r.builtin_unescape, "unescape", 1) })
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// TODO: Annex B
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t.putSym(SymToStringTag, func(r *Runtime) Value { return valueProp(asciiString(classGlobal), false, false, true) })
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return t
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}
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var globalObjectTemplate *objectTemplate
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var globalObjectTemplateOnce sync.Once
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||
|
|
||
|
func getGlobalObjectTemplate() *objectTemplate {
|
||
|
globalObjectTemplateOnce.Do(func() {
|
||
|
globalObjectTemplate = createGlobalObjectTemplate()
|
||
|
})
|
||
|
return globalObjectTemplate
|
||
|
}
|
||
|
|
||
|
func (r *Runtime) getEval() *Object {
|
||
|
ret := r.global.Eval
|
||
|
if ret == nil {
|
||
|
ret = r.newNativeFunc(r.builtin_eval, "eval", 1)
|
||
|
r.global.Eval = ret
|
||
|
}
|
||
|
return ret
|
||
|
}
|
||
|
|
||
|
func digitVal(d byte) int {
|
||
|
var v byte
|
||
|
switch {
|
||
|
case '0' <= d && d <= '9':
|
||
|
v = d - '0'
|
||
|
case 'a' <= d && d <= 'z':
|
||
|
v = d - 'a' + 10
|
||
|
case 'A' <= d && d <= 'Z':
|
||
|
v = d - 'A' + 10
|
||
|
default:
|
||
|
return 36
|
||
|
}
|
||
|
return int(v)
|
||
|
}
|
||
|
|
||
|
// ECMAScript compatible version of strconv.ParseInt
|
||
|
func parseInt(s string, base int) (Value, error) {
|
||
|
var n int64
|
||
|
var err error
|
||
|
var cutoff, maxVal int64
|
||
|
var sign bool
|
||
|
i := 0
|
||
|
|
||
|
if len(s) < 1 {
|
||
|
err = strconv.ErrSyntax
|
||
|
goto Error
|
||
|
}
|
||
|
|
||
|
switch s[0] {
|
||
|
case '-':
|
||
|
sign = true
|
||
|
s = s[1:]
|
||
|
case '+':
|
||
|
s = s[1:]
|
||
|
}
|
||
|
|
||
|
if len(s) < 1 {
|
||
|
err = strconv.ErrSyntax
|
||
|
goto Error
|
||
|
}
|
||
|
|
||
|
// Look for hex prefix.
|
||
|
if s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X') {
|
||
|
if base == 0 || base == 16 {
|
||
|
base = 16
|
||
|
s = s[2:]
|
||
|
}
|
||
|
}
|
||
|
|
||
|
switch {
|
||
|
case len(s) < 1:
|
||
|
err = strconv.ErrSyntax
|
||
|
goto Error
|
||
|
|
||
|
case 2 <= base && base <= 36:
|
||
|
// valid base; nothing to do
|
||
|
|
||
|
case base == 0:
|
||
|
// Look for hex prefix.
|
||
|
switch {
|
||
|
case s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X'):
|
||
|
if len(s) < 3 {
|
||
|
err = strconv.ErrSyntax
|
||
|
goto Error
|
||
|
}
|
||
|
base = 16
|
||
|
s = s[2:]
|
||
|
default:
|
||
|
base = 10
|
||
|
}
|
||
|
|
||
|
default:
|
||
|
err = errors.New("invalid base " + strconv.Itoa(base))
|
||
|
goto Error
|
||
|
}
|
||
|
|
||
|
// Cutoff is the smallest number such that cutoff*base > maxInt64.
|
||
|
// Use compile-time constants for common cases.
|
||
|
switch base {
|
||
|
case 10:
|
||
|
cutoff = math.MaxInt64/10 + 1
|
||
|
case 16:
|
||
|
cutoff = math.MaxInt64/16 + 1
|
||
|
default:
|
||
|
cutoff = math.MaxInt64/int64(base) + 1
|
||
|
}
|
||
|
|
||
|
maxVal = math.MaxInt64
|
||
|
for ; i < len(s); i++ {
|
||
|
if n >= cutoff {
|
||
|
// n*base overflows
|
||
|
return parseLargeInt(float64(n), s[i:], base, sign)
|
||
|
}
|
||
|
v := digitVal(s[i])
|
||
|
if v >= base {
|
||
|
break
|
||
|
}
|
||
|
n *= int64(base)
|
||
|
|
||
|
n1 := n + int64(v)
|
||
|
if n1 < n || n1 > maxVal {
|
||
|
// n+v overflows
|
||
|
return parseLargeInt(float64(n)+float64(v), s[i+1:], base, sign)
|
||
|
}
|
||
|
n = n1
|
||
|
}
|
||
|
|
||
|
if i == 0 {
|
||
|
err = strconv.ErrSyntax
|
||
|
goto Error
|
||
|
}
|
||
|
|
||
|
if sign {
|
||
|
n = -n
|
||
|
}
|
||
|
return intToValue(n), nil
|
||
|
|
||
|
Error:
|
||
|
return _NaN, err
|
||
|
}
|
||
|
|
||
|
func parseLargeInt(n float64, s string, base int, sign bool) (Value, error) {
|
||
|
i := 0
|
||
|
b := float64(base)
|
||
|
for ; i < len(s); i++ {
|
||
|
v := digitVal(s[i])
|
||
|
if v >= base {
|
||
|
break
|
||
|
}
|
||
|
n = n*b + float64(v)
|
||
|
}
|
||
|
if sign {
|
||
|
n = -n
|
||
|
}
|
||
|
// We know it can't be represented as int, so use valueFloat instead of floatToValue
|
||
|
return valueFloat(n), nil
|
||
|
}
|
||
|
|
||
|
var (
|
||
|
uriUnescaped [256]bool
|
||
|
uriReserved [256]bool
|
||
|
uriReservedHash [256]bool
|
||
|
uriReservedUnescapedHash [256]bool
|
||
|
emptyEscapeSet [256]bool
|
||
|
)
|
||
|
|
||
|
func init() {
|
||
|
for _, c := range "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.!~*'()" {
|
||
|
uriUnescaped[c] = true
|
||
|
}
|
||
|
|
||
|
for _, c := range ";/?:@&=+$," {
|
||
|
uriReserved[c] = true
|
||
|
}
|
||
|
|
||
|
for i := 0; i < 256; i++ {
|
||
|
if uriUnescaped[i] || uriReserved[i] {
|
||
|
uriReservedUnescapedHash[i] = true
|
||
|
}
|
||
|
uriReservedHash[i] = uriReserved[i]
|
||
|
}
|
||
|
uriReservedUnescapedHash['#'] = true
|
||
|
uriReservedHash['#'] = true
|
||
|
}
|