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authorWim <wim@42.be>2022-01-31 00:27:37 +0100
committerWim <wim@42.be>2022-03-20 14:57:48 +0100
commite3cafeaf9292f67459ff1d186f68283bfaedf2ae (patch)
treeb69c39620aa91dba695b3b935c6651c0fb37ce75 /vendor/github.com/Rhymen/go-whatsapp/binary/encoder.go
parente7b193788a56ee7cdb02a87a9db0ad6724ef66d5 (diff)
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Add dependencies/vendor (whatsapp)
Diffstat (limited to 'vendor/github.com/Rhymen/go-whatsapp/binary/encoder.go')
-rw-r--r--vendor/github.com/Rhymen/go-whatsapp/binary/encoder.go351
1 files changed, 0 insertions, 351 deletions
diff --git a/vendor/github.com/Rhymen/go-whatsapp/binary/encoder.go b/vendor/github.com/Rhymen/go-whatsapp/binary/encoder.go
deleted file mode 100644
index 59003e7a..00000000
--- a/vendor/github.com/Rhymen/go-whatsapp/binary/encoder.go
+++ /dev/null
@@ -1,351 +0,0 @@
-package binary
-
-import (
- "fmt"
- "github.com/Rhymen/go-whatsapp/binary/token"
- "math"
- "strconv"
- "strings"
-)
-
-type binaryEncoder struct {
- data []byte
-}
-
-func NewEncoder() *binaryEncoder {
- return &binaryEncoder{make([]byte, 0)}
-}
-
-func (w *binaryEncoder) GetData() []byte {
- return w.data
-}
-
-func (w *binaryEncoder) pushByte(b byte) {
- w.data = append(w.data, b)
-}
-
-func (w *binaryEncoder) pushBytes(bytes []byte) {
- w.data = append(w.data, bytes...)
-}
-
-func (w *binaryEncoder) pushIntN(value, n int, littleEndian bool) {
- for i := 0; i < n; i++ {
- var curShift int
- if littleEndian {
- curShift = i
- } else {
- curShift = n - i - 1
- }
- w.pushByte(byte((value >> uint(curShift*8)) & 0xFF))
- }
-}
-
-func (w *binaryEncoder) pushInt20(value int) {
- w.pushBytes([]byte{byte((value >> 16) & 0x0F), byte((value >> 8) & 0xFF), byte(value & 0xFF)})
-}
-
-func (w *binaryEncoder) pushInt8(value int) {
- w.pushIntN(value, 1, false)
-}
-
-func (w *binaryEncoder) pushInt16(value int) {
- w.pushIntN(value, 2, false)
-}
-
-func (w *binaryEncoder) pushInt32(value int) {
- w.pushIntN(value, 4, false)
-}
-
-func (w *binaryEncoder) pushInt64(value int) {
- w.pushIntN(value, 8, false)
-}
-
-func (w *binaryEncoder) pushString(value string) {
- w.pushBytes([]byte(value))
-}
-
-func (w *binaryEncoder) writeByteLength(length int) error {
- if length > math.MaxInt32 {
- return fmt.Errorf("length is too large: %d", length)
- } else if length >= (1 << 20) {
- w.pushByte(token.BINARY_32)
- w.pushInt32(length)
- } else if length >= 256 {
- w.pushByte(token.BINARY_20)
- w.pushInt20(length)
- } else {
- w.pushByte(token.BINARY_8)
- w.pushInt8(length)
- }
-
- return nil
-}
-
-func (w *binaryEncoder) WriteNode(n Node) error {
- numAttributes := 0
- if n.Attributes != nil {
- numAttributes = len(n.Attributes)
- }
-
- hasContent := 0
- if n.Content != nil {
- hasContent = 1
- }
-
- w.writeListStart(2*numAttributes + 1 + hasContent)
- if err := w.writeString(n.Description, false); err != nil {
- return err
- }
-
- if err := w.writeAttributes(n.Attributes); err != nil {
- return err
- }
-
- if err := w.writeChildren(n.Content); err != nil {
- return err
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writeString(tok string, i bool) error {
- if !i && tok == "c.us" {
- if err := w.writeToken(token.IndexOfSingleToken("s.whatsapp.net")); err != nil {
- return err
- }
- return nil
- }
-
- tokenIndex := token.IndexOfSingleToken(tok)
- if tokenIndex == -1 {
- jidSepIndex := strings.Index(tok, "@")
- if jidSepIndex < 1 {
- w.writeStringRaw(tok)
- } else {
- w.writeJid(tok[:jidSepIndex], tok[jidSepIndex+1:])
- }
- } else {
- if tokenIndex < token.SINGLE_BYTE_MAX {
- if err := w.writeToken(tokenIndex); err != nil {
- return err
- }
- } else {
- singleByteOverflow := tokenIndex - token.SINGLE_BYTE_MAX
- dictionaryIndex := singleByteOverflow >> 8
- if dictionaryIndex < 0 || dictionaryIndex > 3 {
- return fmt.Errorf("double byte dictionary token out of range: %v", tok)
- }
- if err := w.writeToken(token.DICTIONARY_0 + dictionaryIndex); err != nil {
- return err
- }
- if err := w.writeToken(singleByteOverflow % 256); err != nil {
- return err
- }
- }
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writeStringRaw(value string) error {
- if err := w.writeByteLength(len(value)); err != nil {
- return err
- }
-
- w.pushString(value)
-
- return nil
-}
-
-func (w *binaryEncoder) writeJid(jidLeft, jidRight string) error {
- w.pushByte(token.JID_PAIR)
-
- if jidLeft != "" {
- if err := w.writePackedBytes(jidLeft); err != nil {
- return err
- }
- } else {
- if err := w.writeToken(token.LIST_EMPTY); err != nil {
- return err
- }
- }
-
- if err := w.writeString(jidRight, false); err != nil {
- return err
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writeToken(tok int) error {
- if tok < len(token.SingleByteTokens) {
- w.pushByte(byte(tok))
- } else if tok <= 500 {
- return fmt.Errorf("invalid token: %d", tok)
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writeAttributes(attributes map[string]string) error {
- if attributes == nil {
- return nil
- }
-
- for key, val := range attributes {
- if val == "" {
- continue
- }
-
- if err := w.writeString(key, false); err != nil {
- return err
- }
-
- if err := w.writeString(val, false); err != nil {
- return err
- }
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writeChildren(children interface{}) error {
- if children == nil {
- return nil
- }
-
- switch childs := children.(type) {
- case string:
- if err := w.writeString(childs, true); err != nil {
- return err
- }
- case []byte:
- if err := w.writeByteLength(len(childs)); err != nil {
- return err
- }
-
- w.pushBytes(childs)
- case []Node:
- w.writeListStart(len(childs))
- for _, n := range childs {
- if err := w.WriteNode(n); err != nil {
- return err
- }
- }
- default:
- return fmt.Errorf("cannot write child of type: %T", children)
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writeListStart(listSize int) {
- if listSize == 0 {
- w.pushByte(byte(token.LIST_EMPTY))
- } else if listSize < 256 {
- w.pushByte(byte(token.LIST_8))
- w.pushInt8(listSize)
- } else {
- w.pushByte(byte(token.LIST_16))
- w.pushInt16(listSize)
- }
-}
-
-func (w *binaryEncoder) writePackedBytes(value string) error {
- if err := w.writePackedBytesImpl(value, token.NIBBLE_8); err != nil {
- if err := w.writePackedBytesImpl(value, token.HEX_8); err != nil {
- return err
- }
- }
-
- return nil
-}
-
-func (w *binaryEncoder) writePackedBytesImpl(value string, dataType int) error {
- numBytes := len(value)
- if numBytes > token.PACKED_MAX {
- return fmt.Errorf("too many bytes to pack: %d", numBytes)
- }
-
- w.pushByte(byte(dataType))
-
- x := 0
- if numBytes%2 != 0 {
- x = 128
- }
- w.pushByte(byte(x | int(math.Ceil(float64(numBytes)/2.0))))
- for i, l := 0, numBytes/2; i < l; i++ {
- b, err := w.packBytePair(dataType, value[2*i:2*i+1], value[2*i+1:2*i+2])
- if err != nil {
- return err
- }
-
- w.pushByte(byte(b))
- }
-
- if (numBytes % 2) != 0 {
- b, err := w.packBytePair(dataType, value[numBytes-1:], "\x00")
- if err != nil {
- return err
- }
-
- w.pushByte(byte(b))
- }
-
- return nil
-}
-
-func (w *binaryEncoder) packBytePair(packType int, part1, part2 string) (int, error) {
- if packType == token.NIBBLE_8 {
- n1, err := packNibble(part1)
- if err != nil {
- return 0, err
- }
-
- n2, err := packNibble(part2)
- if err != nil {
- return 0, err
- }
-
- return (n1 << 4) | n2, nil
- } else if packType == token.HEX_8 {
- n1, err := packHex(part1)
- if err != nil {
- return 0, err
- }
-
- n2, err := packHex(part2)
- if err != nil {
- return 0, err
- }
-
- return (n1 << 4) | n2, nil
- } else {
- return 0, fmt.Errorf("invalid pack type (%d) for byte pair: %s / %s", packType, part1, part2)
- }
-}
-
-func packNibble(value string) (int, error) {
- if value >= "0" && value <= "9" {
- return strconv.Atoi(value)
- } else if value == "-" {
- return 10, nil
- } else if value == "." {
- return 11, nil
- } else if value == "\x00" {
- return 15, nil
- }
-
- return 0, fmt.Errorf("invalid string to pack as nibble: %v", value)
-}
-
-func packHex(value string) (int, error) {
- if (value >= "0" && value <= "9") || (value >= "A" && value <= "F") || (value >= "a" && value <= "f") {
- d, err := strconv.ParseInt(value, 16, 0)
- return int(d), err
- } else if value == "\x00" {
- return 15, nil
- }
-
- return 0, fmt.Errorf("invalid string to pack as hex: %v", value)
-}