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decode_context.go
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decode_context.go
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package json
var (
isWhiteSpace = [256]bool{}
)
func init() {
isWhiteSpace[' '] = true
isWhiteSpace['\n'] = true
isWhiteSpace['\t'] = true
isWhiteSpace['\r'] = true
}
func skipWhiteSpace(buf []byte, cursor int64) int64 {
LOOP:
if isWhiteSpace[buf[cursor]] {
cursor++
goto LOOP
}
return cursor
}
func skipValue(buf []byte, cursor int64) (int64, error) {
cursor = skipWhiteSpace(buf, cursor)
braceCount := 0
bracketCount := 0
buflen := int64(len(buf))
for {
switch buf[cursor] {
case '\000':
return cursor, errUnexpectedEndOfJSON("value of object", cursor)
case '{':
braceCount++
case '[':
bracketCount++
case '}':
braceCount--
if braceCount == -1 && bracketCount == 0 {
return cursor, nil
}
case ']':
bracketCount--
case ',':
if bracketCount == 0 && braceCount == 0 {
return cursor, nil
}
case '"':
cursor++
for ; cursor < buflen; cursor++ {
if buf[cursor] != '"' {
continue
}
if buf[cursor-1] == '\\' {
continue
}
if bracketCount == 0 && braceCount == 0 {
return cursor + 1, nil
}
break
}
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
cursor++
for ; cursor < buflen; cursor++ {
tk := int(buf[cursor])
if (int('0') <= tk && tk <= int('9')) || tk == '.' || tk == 'e' || tk == 'E' {
continue
}
break
}
if bracketCount == 0 && braceCount == 0 {
return cursor, nil
}
continue
case 't':
if cursor+3 >= buflen {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+1] != 'r' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+2] != 'u' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+3] != 'e' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
cursor += 4
if bracketCount == 0 && braceCount == 0 {
return cursor, nil
}
continue
case 'f':
if cursor+4 >= buflen {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+1] != 'a' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+2] != 'l' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+3] != 's' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
if buf[cursor+4] != 'e' {
return 0, errUnexpectedEndOfJSON("bool of object", cursor)
}
cursor += 5
if bracketCount == 0 && braceCount == 0 {
return cursor, nil
}
continue
case 'n':
if cursor+3 >= buflen {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
if buf[cursor+1] != 'u' {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
if buf[cursor+2] != 'l' {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
if buf[cursor+3] != 'l' {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
cursor += 4
if bracketCount == 0 && braceCount == 0 {
return cursor, nil
}
continue
}
cursor++
}
return cursor, errUnexpectedEndOfJSON("value of object", cursor)
}