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-rw-r--r--vendor/github.com/ugorji/go/codec/json.go1234
1 files changed, 1234 insertions, 0 deletions
diff --git a/vendor/github.com/ugorji/go/codec/json.go b/vendor/github.com/ugorji/go/codec/json.go
new file mode 100644
index 000000000..5bb389628
--- /dev/null
+++ b/vendor/github.com/ugorji/go/codec/json.go
@@ -0,0 +1,1234 @@
+// Copyright (c) 2012-2015 Ugorji Nwoke. All rights reserved.
+// Use of this source code is governed by a MIT license found in the LICENSE file.
+
+package codec
+
+// By default, this json support uses base64 encoding for bytes, because you cannot
+// store and read any arbitrary string in json (only unicode).
+// However, the user can configre how to encode/decode bytes.
+//
+// This library specifically supports UTF-8 for encoding and decoding only.
+//
+// Note that the library will happily encode/decode things which are not valid
+// json e.g. a map[int64]string. We do it for consistency. With valid json,
+// we will encode and decode appropriately.
+// Users can specify their map type if necessary to force it.
+//
+// Note:
+// - we cannot use strconv.Quote and strconv.Unquote because json quotes/unquotes differently.
+// We implement it here.
+// - Also, strconv.ParseXXX for floats and integers
+// - only works on strings resulting in unnecessary allocation and []byte-string conversion.
+// - it does a lot of redundant checks, because json numbers are simpler that what it supports.
+// - We parse numbers (floats and integers) directly here.
+// We only delegate parsing floats if it is a hairy float which could cause a loss of precision.
+// In that case, we delegate to strconv.ParseFloat.
+//
+// Note:
+// - encode does not beautify. There is no whitespace when encoding.
+// - rpc calls which take single integer arguments or write single numeric arguments will need care.
+
+// Top-level methods of json(End|Dec)Driver (which are implementations of (en|de)cDriver
+// MUST not call one-another.
+
+import (
+ "bytes"
+ "encoding/base64"
+ "fmt"
+ "reflect"
+ "strconv"
+ "unicode/utf16"
+ "unicode/utf8"
+)
+
+//--------------------------------
+
+var (
+ jsonLiterals = [...]byte{'t', 'r', 'u', 'e', 'f', 'a', 'l', 's', 'e', 'n', 'u', 'l', 'l'}
+
+ jsonFloat64Pow10 = [...]float64{
+ 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
+ 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+ 1e20, 1e21, 1e22,
+ }
+
+ jsonUint64Pow10 = [...]uint64{
+ 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
+ 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+ }
+
+ // jsonTabs and jsonSpaces are used as caches for indents
+ jsonTabs, jsonSpaces string
+)
+
+const (
+ // jsonUnreadAfterDecNum controls whether we unread after decoding a number.
+ //
+ // instead of unreading, just update d.tok (iff it's not a whitespace char)
+ // However, doing this means that we may HOLD onto some data which belongs to another stream.
+ // Thus, it is safest to unread the data when done.
+ // keep behind a constant flag for now.
+ jsonUnreadAfterDecNum = true
+
+ // If !jsonValidateSymbols, decoding will be faster, by skipping some checks:
+ // - If we see first character of null, false or true,
+ // do not validate subsequent characters.
+ // - e.g. if we see a n, assume null and skip next 3 characters,
+ // and do not validate they are ull.
+ // P.S. Do not expect a significant decoding boost from this.
+ jsonValidateSymbols = true
+
+ // if jsonTruncateMantissa, truncate mantissa if trailing 0's.
+ // This is important because it could allow some floats to be decoded without
+ // deferring to strconv.ParseFloat.
+ jsonTruncateMantissa = true
+
+ // if mantissa >= jsonNumUintCutoff before multiplying by 10, this is an overflow
+ jsonNumUintCutoff = (1<<64-1)/uint64(10) + 1 // cutoff64(base)
+
+ // if mantissa >= jsonNumUintMaxVal, this is an overflow
+ jsonNumUintMaxVal = 1<<uint64(64) - 1
+
+ // jsonNumDigitsUint64Largest = 19
+
+ jsonSpacesOrTabsLen = 128
+)
+
+func init() {
+ var bs [jsonSpacesOrTabsLen]byte
+ for i := 0; i < jsonSpacesOrTabsLen; i++ {
+ bs[i] = ' '
+ }
+ jsonSpaces = string(bs[:])
+
+ for i := 0; i < jsonSpacesOrTabsLen; i++ {
+ bs[i] = '\t'
+ }
+ jsonTabs = string(bs[:])
+}
+
+type jsonEncDriver struct {
+ e *Encoder
+ w encWriter
+ h *JsonHandle
+ b [64]byte // scratch
+ bs []byte // scratch
+ se setExtWrapper
+ ds string // indent string
+ dl uint16 // indent level
+ dt bool // indent using tabs
+ d bool // indent
+ c containerState
+ noBuiltInTypes
+}
+
+// indent is done as below:
+// - newline and indent are added before each mapKey or arrayElem
+// - newline and indent are added before each ending,
+// except there was no entry (so we can have {} or [])
+
+func (e *jsonEncDriver) sendContainerState(c containerState) {
+ // determine whether to output separators
+ if c == containerMapKey {
+ if e.c != containerMapStart {
+ e.w.writen1(',')
+ }
+ if e.d {
+ e.writeIndent()
+ }
+ } else if c == containerMapValue {
+ if e.d {
+ e.w.writen2(':', ' ')
+ } else {
+ e.w.writen1(':')
+ }
+ } else if c == containerMapEnd {
+ if e.d {
+ e.dl--
+ if e.c != containerMapStart {
+ e.writeIndent()
+ }
+ }
+ e.w.writen1('}')
+ } else if c == containerArrayElem {
+ if e.c != containerArrayStart {
+ e.w.writen1(',')
+ }
+ if e.d {
+ e.writeIndent()
+ }
+ } else if c == containerArrayEnd {
+ if e.d {
+ e.dl--
+ if e.c != containerArrayStart {
+ e.writeIndent()
+ }
+ }
+ e.w.writen1(']')
+ }
+ e.c = c
+}
+
+func (e *jsonEncDriver) writeIndent() {
+ e.w.writen1('\n')
+ if x := len(e.ds) * int(e.dl); x <= jsonSpacesOrTabsLen {
+ if e.dt {
+ e.w.writestr(jsonTabs[:x])
+ } else {
+ e.w.writestr(jsonSpaces[:x])
+ }
+ } else {
+ for i := uint16(0); i < e.dl; i++ {
+ e.w.writestr(e.ds)
+ }
+ }
+}
+
+func (e *jsonEncDriver) EncodeNil() {
+ e.w.writeb(jsonLiterals[9:13]) // null
+}
+
+func (e *jsonEncDriver) EncodeBool(b bool) {
+ if b {
+ e.w.writeb(jsonLiterals[0:4]) // true
+ } else {
+ e.w.writeb(jsonLiterals[4:9]) // false
+ }
+}
+
+func (e *jsonEncDriver) EncodeFloat32(f float32) {
+ e.encodeFloat(float64(f), 32)
+}
+
+func (e *jsonEncDriver) EncodeFloat64(f float64) {
+ // e.w.writestr(strconv.FormatFloat(f, 'E', -1, 64))
+ e.encodeFloat(f, 64)
+}
+
+func (e *jsonEncDriver) encodeFloat(f float64, numbits int) {
+ x := strconv.AppendFloat(e.b[:0], f, 'G', -1, numbits)
+ e.w.writeb(x)
+ if bytes.IndexByte(x, 'E') == -1 && bytes.IndexByte(x, '.') == -1 {
+ e.w.writen2('.', '0')
+ }
+}
+
+func (e *jsonEncDriver) EncodeInt(v int64) {
+ if x := e.h.IntegerAsString; x == 'A' || x == 'L' && (v > 1<<53 || v < -(1<<53)) {
+ e.w.writen1('"')
+ e.w.writeb(strconv.AppendInt(e.b[:0], v, 10))
+ e.w.writen1('"')
+ return
+ }
+ e.w.writeb(strconv.AppendInt(e.b[:0], v, 10))
+}
+
+func (e *jsonEncDriver) EncodeUint(v uint64) {
+ if x := e.h.IntegerAsString; x == 'A' || x == 'L' && v > 1<<53 {
+ e.w.writen1('"')
+ e.w.writeb(strconv.AppendUint(e.b[:0], v, 10))
+ e.w.writen1('"')
+ return
+ }
+ e.w.writeb(strconv.AppendUint(e.b[:0], v, 10))
+}
+
+func (e *jsonEncDriver) EncodeExt(rv interface{}, xtag uint64, ext Ext, en *Encoder) {
+ if v := ext.ConvertExt(rv); v == nil {
+ e.w.writeb(jsonLiterals[9:13]) // null // e.EncodeNil()
+ } else {
+ en.encode(v)
+ }
+}
+
+func (e *jsonEncDriver) EncodeRawExt(re *RawExt, en *Encoder) {
+ // only encodes re.Value (never re.Data)
+ if re.Value == nil {
+ e.w.writeb(jsonLiterals[9:13]) // null // e.EncodeNil()
+ } else {
+ en.encode(re.Value)
+ }
+}
+
+func (e *jsonEncDriver) EncodeArrayStart(length int) {
+ if e.d {
+ e.dl++
+ }
+ e.w.writen1('[')
+ e.c = containerArrayStart
+}
+
+func (e *jsonEncDriver) EncodeMapStart(length int) {
+ if e.d {
+ e.dl++
+ }
+ e.w.writen1('{')
+ e.c = containerMapStart
+}
+
+func (e *jsonEncDriver) EncodeString(c charEncoding, v string) {
+ // e.w.writestr(strconv.Quote(v))
+ e.quoteStr(v)
+}
+
+func (e *jsonEncDriver) EncodeSymbol(v string) {
+ // e.EncodeString(c_UTF8, v)
+ e.quoteStr(v)
+}
+
+func (e *jsonEncDriver) EncodeStringBytes(c charEncoding, v []byte) {
+ // if encoding raw bytes and RawBytesExt is configured, use it to encode
+ if c == c_RAW && e.se.i != nil {
+ e.EncodeExt(v, 0, &e.se, e.e)
+ return
+ }
+ if c == c_RAW {
+ slen := base64.StdEncoding.EncodedLen(len(v))
+ if cap(e.bs) >= slen {
+ e.bs = e.bs[:slen]
+ } else {
+ e.bs = make([]byte, slen)
+ }
+ base64.StdEncoding.Encode(e.bs, v)
+ e.w.writen1('"')
+ e.w.writeb(e.bs)
+ e.w.writen1('"')
+ } else {
+ // e.EncodeString(c, string(v))
+ e.quoteStr(stringView(v))
+ }
+}
+
+func (e *jsonEncDriver) EncodeAsis(v []byte) {
+ e.w.writeb(v)
+}
+
+func (e *jsonEncDriver) quoteStr(s string) {
+ // adapted from std pkg encoding/json
+ const hex = "0123456789abcdef"
+ w := e.w
+ w.writen1('"')
+ start := 0
+ for i := 0; i < len(s); {
+ if b := s[i]; b < utf8.RuneSelf {
+ if 0x20 <= b && b != '\\' && b != '"' && b != '<' && b != '>' && b != '&' {
+ i++
+ continue
+ }
+ if start < i {
+ w.writestr(s[start:i])
+ }
+ switch b {
+ case '\\', '"':
+ w.writen2('\\', b)
+ case '\n':
+ w.writen2('\\', 'n')
+ case '\r':
+ w.writen2('\\', 'r')
+ case '\b':
+ w.writen2('\\', 'b')
+ case '\f':
+ w.writen2('\\', 'f')
+ case '\t':
+ w.writen2('\\', 't')
+ default:
+ // encode all bytes < 0x20 (except \r, \n).
+ // also encode < > & to prevent security holes when served to some browsers.
+ w.writestr(`\u00`)
+ w.writen2(hex[b>>4], hex[b&0xF])
+ }
+ i++
+ start = i
+ continue
+ }
+ c, size := utf8.DecodeRuneInString(s[i:])
+ if c == utf8.RuneError && size == 1 {
+ if start < i {
+ w.writestr(s[start:i])
+ }
+ w.writestr(`\ufffd`)
+ i += size
+ start = i
+ continue
+ }
+ // U+2028 is LINE SEPARATOR. U+2029 is PARAGRAPH SEPARATOR.
+ // Both technically valid JSON, but bomb on JSONP, so fix here.
+ if c == '\u2028' || c == '\u2029' {
+ if start < i {
+ w.writestr(s[start:i])
+ }
+ w.writestr(`\u202`)
+ w.writen1(hex[c&0xF])
+ i += size
+ start = i
+ continue
+ }
+ i += size
+ }
+ if start < len(s) {
+ w.writestr(s[start:])
+ }
+ w.writen1('"')
+}
+
+//--------------------------------
+
+type jsonNum struct {
+ // bytes []byte // may have [+-.eE0-9]
+ mantissa uint64 // where mantissa ends, and maybe dot begins.
+ exponent int16 // exponent value.
+ manOverflow bool
+ neg bool // started with -. No initial sign in the bytes above.
+ dot bool // has dot
+ explicitExponent bool // explicit exponent
+}
+
+func (x *jsonNum) reset() {
+ x.manOverflow = false
+ x.neg = false
+ x.dot = false
+ x.explicitExponent = false
+ x.mantissa = 0
+ x.exponent = 0
+}
+
+// uintExp is called only if exponent > 0.
+func (x *jsonNum) uintExp() (n uint64, overflow bool) {
+ n = x.mantissa
+ e := x.exponent
+ if e >= int16(len(jsonUint64Pow10)) {
+ overflow = true
+ return
+ }
+ n *= jsonUint64Pow10[e]
+ if n < x.mantissa || n > jsonNumUintMaxVal {
+ overflow = true
+ return
+ }
+ return
+ // for i := int16(0); i < e; i++ {
+ // if n >= jsonNumUintCutoff {
+ // overflow = true
+ // return
+ // }
+ // n *= 10
+ // }
+ // return
+}
+
+// these constants are only used withn floatVal.
+// They are brought out, so that floatVal can be inlined.
+const (
+ jsonUint64MantissaBits = 52
+ jsonMaxExponent = int16(len(jsonFloat64Pow10)) - 1
+)
+
+func (x *jsonNum) floatVal() (f float64, parseUsingStrConv bool) {
+ // We do not want to lose precision.
+ // Consequently, we will delegate to strconv.ParseFloat if any of the following happen:
+ // - There are more digits than in math.MaxUint64: 18446744073709551615 (20 digits)
+ // We expect up to 99.... (19 digits)
+ // - The mantissa cannot fit into a 52 bits of uint64
+ // - The exponent is beyond our scope ie beyong 22.
+ parseUsingStrConv = x.manOverflow ||
+ x.exponent > jsonMaxExponent ||
+ (x.exponent < 0 && -(x.exponent) > jsonMaxExponent) ||
+ x.mantissa>>jsonUint64MantissaBits != 0
+
+ if parseUsingStrConv {
+ return
+ }
+
+ // all good. so handle parse here.
+ f = float64(x.mantissa)
+ // fmt.Printf(".Float: uint64 value: %v, float: %v\n", m, f)
+ if x.neg {
+ f = -f
+ }
+ if x.exponent > 0 {
+ f *= jsonFloat64Pow10[x.exponent]
+ } else if x.exponent < 0 {
+ f /= jsonFloat64Pow10[-x.exponent]
+ }
+ return
+}
+
+type jsonDecDriver struct {
+ noBuiltInTypes
+ d *Decoder
+ h *JsonHandle
+ r decReader
+
+ c containerState
+ // tok is used to store the token read right after skipWhiteSpace.
+ tok uint8
+
+ bstr [8]byte // scratch used for string \UXXX parsing
+ b [64]byte // scratch, used for parsing strings or numbers
+ b2 [64]byte // scratch, used only for decodeBytes (after base64)
+ bs []byte // scratch. Initialized from b. Used for parsing strings or numbers.
+
+ se setExtWrapper
+
+ n jsonNum
+}
+
+func jsonIsWS(b byte) bool {
+ return b == ' ' || b == '\t' || b == '\r' || b == '\n'
+}
+
+// // This will skip whitespace characters and return the next byte to read.
+// // The next byte determines what the value will be one of.
+// func (d *jsonDecDriver) skipWhitespace() {
+// // fast-path: do not enter loop. Just check first (in case no whitespace).
+// b := d.r.readn1()
+// if jsonIsWS(b) {
+// r := d.r
+// for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+// }
+// }
+// d.tok = b
+// }
+
+func (d *jsonDecDriver) uncacheRead() {
+ if d.tok != 0 {
+ d.r.unreadn1()
+ d.tok = 0
+ }
+}
+
+func (d *jsonDecDriver) sendContainerState(c containerState) {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ var xc uint8 // char expected
+ if c == containerMapKey {
+ if d.c != containerMapStart {
+ xc = ','
+ }
+ } else if c == containerMapValue {
+ xc = ':'
+ } else if c == containerMapEnd {
+ xc = '}'
+ } else if c == containerArrayElem {
+ if d.c != containerArrayStart {
+ xc = ','
+ }
+ } else if c == containerArrayEnd {
+ xc = ']'
+ }
+ if xc != 0 {
+ if d.tok != xc {
+ d.d.errorf("json: expect char '%c' but got char '%c'", xc, d.tok)
+ }
+ d.tok = 0
+ }
+ d.c = c
+}
+
+func (d *jsonDecDriver) CheckBreak() bool {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ if d.tok == '}' || d.tok == ']' {
+ // d.tok = 0 // only checking, not consuming
+ return true
+ }
+ return false
+}
+
+func (d *jsonDecDriver) readStrIdx(fromIdx, toIdx uint8) {
+ bs := d.r.readx(int(toIdx - fromIdx))
+ d.tok = 0
+ if jsonValidateSymbols {
+ if !bytes.Equal(bs, jsonLiterals[fromIdx:toIdx]) {
+ d.d.errorf("json: expecting %s: got %s", jsonLiterals[fromIdx:toIdx], bs)
+ return
+ }
+ }
+}
+
+func (d *jsonDecDriver) TryDecodeAsNil() bool {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ if d.tok == 'n' {
+ d.readStrIdx(10, 13) // ull
+ return true
+ }
+ return false
+}
+
+func (d *jsonDecDriver) DecodeBool() bool {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ if d.tok == 'f' {
+ d.readStrIdx(5, 9) // alse
+ return false
+ }
+ if d.tok == 't' {
+ d.readStrIdx(1, 4) // rue
+ return true
+ }
+ d.d.errorf("json: decode bool: got first char %c", d.tok)
+ return false // "unreachable"
+}
+
+func (d *jsonDecDriver) ReadMapStart() int {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ if d.tok != '{' {
+ d.d.errorf("json: expect char '%c' but got char '%c'", '{', d.tok)
+ }
+ d.tok = 0
+ d.c = containerMapStart
+ return -1
+}
+
+func (d *jsonDecDriver) ReadArrayStart() int {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ if d.tok != '[' {
+ d.d.errorf("json: expect char '%c' but got char '%c'", '[', d.tok)
+ }
+ d.tok = 0
+ d.c = containerArrayStart
+ return -1
+}
+
+func (d *jsonDecDriver) ContainerType() (vt valueType) {
+ // check container type by checking the first char
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ if b := d.tok; b == '{' {
+ return valueTypeMap
+ } else if b == '[' {
+ return valueTypeArray
+ } else if b == 'n' {
+ return valueTypeNil
+ } else if b == '"' {
+ return valueTypeString
+ }
+ return valueTypeUnset
+ // d.d.errorf("isContainerType: unsupported parameter: %v", vt)
+ // return false // "unreachable"
+}
+
+func (d *jsonDecDriver) decNum(storeBytes bool) {
+ // If it is has a . or an e|E, decode as a float; else decode as an int.
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ b := d.tok
+ var str bool
+ if b == '"' {
+ str = true
+ b = d.r.readn1()
+ }
+ if !(b == '+' || b == '-' || b == '.' || (b >= '0' && b <= '9')) {
+ d.d.errorf("json: decNum: got first char '%c'", b)
+ return
+ }
+ d.tok = 0
+
+ const cutoff = (1<<64-1)/uint64(10) + 1 // cutoff64(base)
+ const jsonNumUintMaxVal = 1<<uint64(64) - 1
+
+ n := &d.n
+ r := d.r
+ n.reset()
+ d.bs = d.bs[:0]
+
+ if str && storeBytes {
+ d.bs = append(d.bs, '"')
+ }
+
+ // The format of a number is as below:
+ // parsing: sign? digit* dot? digit* e? sign? digit*
+ // states: 0 1* 2 3* 4 5* 6 7
+ // We honor this state so we can break correctly.
+ var state uint8 = 0
+ var eNeg bool
+ var e int16
+ var eof bool
+LOOP:
+ for !eof {
+ // fmt.Printf("LOOP: b: %q\n", b)
+ switch b {
+ case '+':
+ switch state {
+ case 0:
+ state = 2
+ // do not add sign to the slice ...
+ b, eof = r.readn1eof()
+ continue
+ case 6: // typ = jsonNumFloat
+ state = 7
+ default:
+ break LOOP
+ }
+ case '-':
+ switch state {
+ case 0:
+ state = 2
+ n.neg = true
+ // do not add sign to the slice ...
+ b, eof = r.readn1eof()
+ continue
+ case 6: // typ = jsonNumFloat
+ eNeg = true
+ state = 7
+ default:
+ break LOOP
+ }
+ case '.':
+ switch state {
+ case 0, 2: // typ = jsonNumFloat
+ state = 4
+ n.dot = true
+ default:
+ break LOOP
+ }
+ case 'e', 'E':
+ switch state {
+ case 0, 2, 4: // typ = jsonNumFloat
+ state = 6
+ // n.mantissaEndIndex = int16(len(n.bytes))
+ n.explicitExponent = true
+ default:
+ break LOOP
+ }
+ case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+ switch state {
+ case 0:
+ state = 2
+ fallthrough
+ case 2:
+ fallthrough
+ case 4:
+ if n.dot {
+ n.exponent--
+ }
+ if n.mantissa >= jsonNumUintCutoff {
+ n.manOverflow = true
+ break
+ }
+ v := uint64(b - '0')
+ n.mantissa *= 10
+ if v != 0 {
+ n1 := n.mantissa + v
+ if n1 < n.mantissa || n1 > jsonNumUintMaxVal {
+ n.manOverflow = true // n+v overflows
+ break
+ }
+ n.mantissa = n1
+ }
+ case 6:
+ state = 7
+ fallthrough
+ case 7:
+ if !(b == '0' && e == 0) {
+ e = e*10 + int16(b-'0')
+ }
+ default:
+ break LOOP
+ }
+ case '"':
+ if str {
+ if storeBytes {
+ d.bs = append(d.bs, '"')
+ }
+ b, eof = r.readn1eof()
+ }
+ break LOOP
+ default:
+ break LOOP
+ }
+ if storeBytes {
+ d.bs = append(d.bs, b)
+ }
+ b, eof = r.readn1eof()
+ }
+
+ if jsonTruncateMantissa && n.mantissa != 0 {
+ for n.mantissa%10 == 0 {
+ n.mantissa /= 10
+ n.exponent++
+ }
+ }
+
+ if e != 0 {
+ if eNeg {
+ n.exponent -= e
+ } else {
+ n.exponent += e
+ }
+ }
+
+ // d.n = n
+
+ if !eof {
+ if jsonUnreadAfterDecNum {
+ r.unreadn1()
+ } else {
+ if !jsonIsWS(b) {
+ d.tok = b
+ }
+ }
+ }
+ // fmt.Printf("1: n: bytes: %s, neg: %v, dot: %v, exponent: %v, mantissaEndIndex: %v\n",
+ // n.bytes, n.neg, n.dot, n.exponent, n.mantissaEndIndex)
+ return
+}
+
+func (d *jsonDecDriver) DecodeInt(bitsize uint8) (i int64) {
+ d.decNum(false)
+ n := &d.n
+ if n.manOverflow {
+ d.d.errorf("json: overflow integer after: %v", n.mantissa)
+ return
+ }
+ var u uint64
+ if n.exponent == 0 {
+ u = n.mantissa
+ } else if n.exponent < 0 {
+ d.d.errorf("json: fractional integer")
+ return
+ } else if n.exponent > 0 {
+ var overflow bool
+ if u, overflow = n.uintExp(); overflow {
+ d.d.errorf("json: overflow integer")
+ return
+ }
+ }
+ i = int64(u)
+ if n.neg {
+ i = -i
+ }
+ if chkOvf.Int(i, bitsize) {
+ d.d.errorf("json: overflow %v bits: %s", bitsize, d.bs)
+ return
+ }
+ // fmt.Printf("DecodeInt: %v\n", i)
+ return
+}
+
+// floatVal MUST only be called after a decNum, as d.bs now contains the bytes of the number
+func (d *jsonDecDriver) floatVal() (f float64) {
+ f, useStrConv := d.n.floatVal()
+ if useStrConv {
+ var err error
+ if f, err = strconv.ParseFloat(stringView(d.bs), 64); err != nil {
+ panic(fmt.Errorf("parse float: %s, %v", d.bs, err))
+ }
+ if d.n.neg {
+ f = -f
+ }
+ }
+ return
+}
+
+func (d *jsonDecDriver) DecodeUint(bitsize uint8) (u uint64) {
+ d.decNum(false)
+ n := &d.n
+ if n.neg {
+ d.d.errorf("json: unsigned integer cannot be negative")
+ return
+ }
+ if n.manOverflow {
+ d.d.errorf("json: overflow integer after: %v", n.mantissa)
+ return
+ }
+ if n.exponent == 0 {
+ u = n.mantissa
+ } else if n.exponent < 0 {
+ d.d.errorf("json: fractional integer")
+ return
+ } else if n.exponent > 0 {
+ var overflow bool
+ if u, overflow = n.uintExp(); overflow {
+ d.d.errorf("json: overflow integer")
+ return
+ }
+ }
+ if chkOvf.Uint(u, bitsize) {
+ d.d.errorf("json: overflow %v bits: %s", bitsize, d.bs)
+ return
+ }
+ // fmt.Printf("DecodeUint: %v\n", u)
+ return
+}
+
+func (d *jsonDecDriver) DecodeFloat(chkOverflow32 bool) (f float64) {
+ d.decNum(true)
+ f = d.floatVal()
+ if chkOverflow32 && chkOvf.Float32(f) {
+ d.d.errorf("json: overflow float32: %v, %s", f, d.bs)
+ return
+ }
+ return
+}
+
+func (d *jsonDecDriver) DecodeExt(rv interface{}, xtag uint64, ext Ext) (realxtag uint64) {
+ if ext == nil {
+ re := rv.(*RawExt)
+ re.Tag = xtag
+ d.d.decode(&re.Value)
+ } else {
+ var v interface{}
+ d.d.decode(&v)
+ ext.UpdateExt(rv, v)
+ }
+ return
+}
+
+func (d *jsonDecDriver) DecodeBytes(bs []byte, isstring, zerocopy bool) (bsOut []byte) {
+ // if decoding into raw bytes, and the RawBytesExt is configured, use it to decode.
+ if !isstring && d.se.i != nil {
+ bsOut = bs
+ d.DecodeExt(&bsOut, 0, &d.se)
+ return
+ }
+ d.appendStringAsBytes()
+ // if isstring, then just return the bytes, even if it is using the scratch buffer.
+ // the bytes will be converted to a string as needed.
+ if isstring {
+ return d.bs
+ }
+ // if appendStringAsBytes returned a zero-len slice, then treat as nil.
+ // This should only happen for null, and "".
+ if len(d.bs) == 0 {
+ return nil
+ }
+ bs0 := d.bs
+ slen := base64.StdEncoding.DecodedLen(len(bs0))
+ if slen <= cap(bs) {
+ bsOut = bs[:slen]
+ } else if zerocopy && slen <= cap(d.b2) {
+ bsOut = d.b2[:slen]
+ } else {
+ bsOut = make([]byte, slen)
+ }
+ slen2, err := base64.StdEncoding.Decode(bsOut, bs0)
+ if err != nil {
+ d.d.errorf("json: error decoding base64 binary '%s': %v", bs0, err)
+ return nil
+ }
+ if slen != slen2 {
+ bsOut = bsOut[:slen2]
+ }
+ return
+}
+
+func (d *jsonDecDriver) DecodeString() (s string) {
+ d.appendStringAsBytes()
+ // if x := d.s.sc; x != nil && x.so && x.st == '}' { // map key
+ if d.c == containerMapKey {
+ return d.d.string(d.bs)
+ }
+ return string(d.bs)
+}
+
+func (d *jsonDecDriver) appendStringAsBytes() {
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+
+ // handle null as a string
+ if d.tok == 'n' {
+ d.readStrIdx(10, 13) // ull
+ d.bs = d.bs[:0]
+ return
+ }
+
+ if d.tok != '"' {
+ d.d.errorf("json: expect char '%c' but got char '%c'", '"', d.tok)
+ }
+ d.tok = 0
+
+ v := d.bs[:0]
+ var c uint8
+ r := d.r
+ for {
+ c = r.readn1()
+ if c == '"' {
+ break
+ } else if c == '\\' {
+ c = r.readn1()
+ switch c {
+ case '"', '\\', '/', '\'':
+ v = append(v, c)
+ case 'b':
+ v = append(v, '\b')
+ case 'f':
+ v = append(v, '\f')
+ case 'n':
+ v = append(v, '\n')
+ case 'r':
+ v = append(v, '\r')
+ case 't':
+ v = append(v, '\t')
+ case 'u':
+ rr := d.jsonU4(false)
+ // fmt.Printf("$$$$$$$$$: is surrogate: %v\n", utf16.IsSurrogate(rr))
+ if utf16.IsSurrogate(rr) {
+ rr = utf16.DecodeRune(rr, d.jsonU4(true))
+ }
+ w2 := utf8.EncodeRune(d.bstr[:], rr)
+ v = append(v, d.bstr[:w2]...)
+ default:
+ d.d.errorf("json: unsupported escaped value: %c", c)
+ }
+ } else {
+ v = append(v, c)
+ }
+ }
+ d.bs = v
+}
+
+func (d *jsonDecDriver) jsonU4(checkSlashU bool) rune {
+ r := d.r
+ if checkSlashU && !(r.readn1() == '\\' && r.readn1() == 'u') {
+ d.d.errorf(`json: unquoteStr: invalid unicode sequence. Expecting \u`)
+ return 0
+ }
+ // u, _ := strconv.ParseUint(string(d.bstr[:4]), 16, 64)
+ var u uint32
+ for i := 0; i < 4; i++ {
+ v := r.readn1()
+ if '0' <= v && v <= '9' {
+ v = v - '0'
+ } else if 'a' <= v && v <= 'z' {
+ v = v - 'a' + 10
+ } else if 'A' <= v && v <= 'Z' {
+ v = v - 'A' + 10
+ } else {
+ d.d.errorf(`json: unquoteStr: invalid hex char in \u unicode sequence: %q`, v)
+ return 0
+ }
+ u = u*16 + uint32(v)
+ }
+ return rune(u)
+}
+
+func (d *jsonDecDriver) DecodeNaked() {
+ z := &d.d.n
+ // var decodeFurther bool
+
+ if d.tok == 0 {
+ var b byte
+ r := d.r
+ for b = r.readn1(); jsonIsWS(b); b = r.readn1() {
+ }
+ d.tok = b
+ }
+ switch d.tok {
+ case 'n':
+ d.readStrIdx(10, 13) // ull
+ z.v = valueTypeNil
+ case 'f':
+ d.readStrIdx(5, 9) // alse
+ z.v = valueTypeBool
+ z.b = false
+ case 't':
+ d.readStrIdx(1, 4) // rue
+ z.v = valueTypeBool
+ z.b = true
+ case '{':
+ z.v = valueTypeMap
+ // d.tok = 0 // don't consume. kInterfaceNaked will call ReadMapStart
+ // decodeFurther = true
+ case '[':
+ z.v = valueTypeArray
+ // d.tok = 0 // don't consume. kInterfaceNaked will call ReadArrayStart
+ // decodeFurther = true
+ case '"':
+ z.v = valueTypeString
+ z.s = d.DecodeString()
+ default: // number
+ d.decNum(true)
+ n := &d.n
+ // if the string had a any of [.eE], then decode as float.
+ switch {
+ case n.explicitExponent, n.dot, n.exponent < 0, n.manOverflow:
+ z.v = valueTypeFloat
+ z.f = d.floatVal()
+ case n.exponent == 0:
+ u := n.mantissa
+ switch {
+ case n.neg:
+ z.v = valueTypeInt
+ z.i = -int64(u)
+ case d.h.SignedInteger:
+ z.v = valueTypeInt
+ z.i = int64(u)
+ default:
+ z.v = valueTypeUint
+ z.u = u
+ }
+ default:
+ u, overflow := n.uintExp()
+ switch {
+ case overflow:
+ z.v = valueTypeFloat
+ z.f = d.floatVal()
+ case n.neg:
+ z.v = valueTypeInt
+ z.i = -int64(u)
+ case d.h.SignedInteger:
+ z.v = valueTypeInt
+ z.i = int64(u)
+ default:
+ z.v = valueTypeUint
+ z.u = u
+ }
+ }
+ // fmt.Printf("DecodeNaked: Number: %T, %v\n", v, v)
+ }
+ // if decodeFurther {
+ // d.s.sc.retryRead()
+ // }
+ return
+}
+
+//----------------------
+
+// JsonHandle is a handle for JSON encoding format.
+//
+// Json is comprehensively supported:
+// - decodes numbers into interface{} as int, uint or float64
+// - configurable way to encode/decode []byte .
+// by default, encodes and decodes []byte using base64 Std Encoding
+// - UTF-8 support for encoding and decoding
+//
+// It has better performance than the json library in the standard library,
+// by leveraging the performance improvements of the codec library and
+// minimizing allocations.
+//
+// In addition, it doesn't read more bytes than necessary during a decode, which allows
+// reading multiple values from a stream containing json and non-json content.
+// For example, a user can read a json value, then a cbor value, then a msgpack value,
+// all from the same stream in sequence.
+type JsonHandle struct {
+ textEncodingType
+ BasicHandle
+ // RawBytesExt, if configured, is used to encode and decode raw bytes in a custom way.
+ // If not configured, raw bytes are encoded to/from base64 text.
+ RawBytesExt InterfaceExt
+
+ // Indent indicates how a value is encoded.
+ // - If positive, indent by that number of spaces.
+ // - If negative, indent by that number of tabs.
+ Indent int8
+
+ // IntegerAsString controls how integers (signed and unsigned) are encoded.
+ //
+ // Per the JSON Spec, JSON numbers are 64-bit floating point numbers.
+ // Consequently, integers > 2^53 cannot be represented as a JSON number without losing precision.
+ // This can be mitigated by configuring how to encode integers.
+ //
+ // IntegerAsString interpretes the following values:
+ // - if 'L', then encode integers > 2^53 as a json string.
+ // - if 'A', then encode all integers as a json string
+ // containing the exact integer representation as a decimal.
+ // - else encode all integers as a json number (default)
+ IntegerAsString uint8
+}
+
+func (h *JsonHandle) SetInterfaceExt(rt reflect.Type, tag uint64, ext InterfaceExt) (err error) {
+ return h.SetExt(rt, tag, &setExtWrapper{i: ext})
+}
+
+func (h *JsonHandle) newEncDriver(e *Encoder) encDriver {
+ hd := jsonEncDriver{e: e, h: h}
+ hd.bs = hd.b[:0]
+
+ hd.reset()
+
+ return &hd
+}
+
+func (h *JsonHandle) newDecDriver(d *Decoder) decDriver {
+ // d := jsonDecDriver{r: r.(*bytesDecReader), h: h}
+ hd := jsonDecDriver{d: d, h: h}
+ hd.bs = hd.b[:0]
+ hd.reset()
+ return &hd
+}
+
+func (e *jsonEncDriver) reset() {
+ e.w = e.e.w
+ e.se.i = e.h.RawBytesExt
+ if e.bs != nil {
+ e.bs = e.bs[:0]
+ }
+ e.d, e.dt, e.dl, e.ds = false, false, 0, ""
+ e.c = 0
+ if e.h.Indent > 0 {
+ e.d = true
+ e.ds = jsonSpaces[:e.h.Indent]
+ } else if e.h.Indent < 0 {
+ e.d = true
+ e.dt = true
+ e.ds = jsonTabs[:-(e.h.Indent)]
+ }
+}
+
+func (d *jsonDecDriver) reset() {
+ d.r = d.d.r
+ d.se.i = d.h.RawBytesExt
+ if d.bs != nil {
+ d.bs = d.bs[:0]
+ }
+ d.c, d.tok = 0, 0
+ d.n.reset()
+}
+
+var jsonEncodeTerminate = []byte{' '}
+
+func (h *JsonHandle) rpcEncodeTerminate() []byte {
+ return jsonEncodeTerminate
+}
+
+var _ decDriver = (*jsonDecDriver)(nil)
+var _ encDriver = (*jsonEncDriver)(nil)
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-01-30 01:36:15 +0000