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authorWim <wim@42.be>2020-08-10 00:29:54 +0200
committerGitHub <noreply@github.com>2020-08-10 00:29:54 +0200
commit4e50fd864921c556988c919269448efdb90fa961 (patch)
treea3625f03f8de3c4f3841364000a4ea3aa42c1533 /vendor/github.com/francoispqt/gojay/decode_string.go
parentdfdffa0027334e55ce213fc6eb62206dbf48baf6 (diff)
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Use mattermost v5 module (#1192)
Diffstat (limited to 'vendor/github.com/francoispqt/gojay/decode_string.go')
-rw-r--r--vendor/github.com/francoispqt/gojay/decode_string.go260
1 files changed, 260 insertions, 0 deletions
diff --git a/vendor/github.com/francoispqt/gojay/decode_string.go b/vendor/github.com/francoispqt/gojay/decode_string.go
new file mode 100644
index 00000000..694359c7
--- /dev/null
+++ b/vendor/github.com/francoispqt/gojay/decode_string.go
@@ -0,0 +1,260 @@
+package gojay
+
+import (
+ "unsafe"
+)
+
+// DecodeString reads the next JSON-encoded value from the decoder's input (io.Reader) and stores it in the string pointed to by v.
+//
+// See the documentation for Unmarshal for details about the conversion of JSON into a Go value.
+func (dec *Decoder) DecodeString(v *string) error {
+ if dec.isPooled == 1 {
+ panic(InvalidUsagePooledDecoderError("Invalid usage of pooled decoder"))
+ }
+ return dec.decodeString(v)
+}
+func (dec *Decoder) decodeString(v *string) error {
+ for ; dec.cursor < dec.length || dec.read(); dec.cursor++ {
+ switch dec.data[dec.cursor] {
+ case ' ', '\n', '\t', '\r', ',':
+ // is string
+ continue
+ case '"':
+ dec.cursor++
+ start, end, err := dec.getString()
+ if err != nil {
+ return err
+ }
+ // we do minus one to remove the last quote
+ d := dec.data[start : end-1]
+ *v = *(*string)(unsafe.Pointer(&d))
+ dec.cursor = end
+ return nil
+ // is nil
+ case 'n':
+ dec.cursor++
+ err := dec.assertNull()
+ if err != nil {
+ return err
+ }
+ return nil
+ default:
+ dec.err = dec.makeInvalidUnmarshalErr(v)
+ err := dec.skipData()
+ if err != nil {
+ return err
+ }
+ return nil
+ }
+ }
+ return nil
+}
+
+func (dec *Decoder) decodeStringNull(v **string) error {
+ for ; dec.cursor < dec.length || dec.read(); dec.cursor++ {
+ switch dec.data[dec.cursor] {
+ case ' ', '\n', '\t', '\r', ',':
+ // is string
+ continue
+ case '"':
+ dec.cursor++
+ start, end, err := dec.getString()
+
+ if err != nil {
+ return err
+ }
+ if *v == nil {
+ *v = new(string)
+ }
+ // we do minus one to remove the last quote
+ d := dec.data[start : end-1]
+ **v = *(*string)(unsafe.Pointer(&d))
+ dec.cursor = end
+ return nil
+ // is nil
+ case 'n':
+ dec.cursor++
+ err := dec.assertNull()
+ if err != nil {
+ return err
+ }
+ return nil
+ default:
+ dec.err = dec.makeInvalidUnmarshalErr(v)
+ err := dec.skipData()
+ if err != nil {
+ return err
+ }
+ return nil
+ }
+ }
+ return nil
+}
+
+func (dec *Decoder) parseEscapedString() error {
+ if dec.cursor >= dec.length && !dec.read() {
+ return dec.raiseInvalidJSONErr(dec.cursor)
+ }
+ switch dec.data[dec.cursor] {
+ case '"':
+ dec.data[dec.cursor] = '"'
+ case '\\':
+ dec.data[dec.cursor] = '\\'
+ case '/':
+ dec.data[dec.cursor] = '/'
+ case 'b':
+ dec.data[dec.cursor] = '\b'
+ case 'f':
+ dec.data[dec.cursor] = '\f'
+ case 'n':
+ dec.data[dec.cursor] = '\n'
+ case 'r':
+ dec.data[dec.cursor] = '\r'
+ case 't':
+ dec.data[dec.cursor] = '\t'
+ case 'u':
+ start := dec.cursor
+ dec.cursor++
+ str, err := dec.parseUnicode()
+ if err != nil {
+ return err
+ }
+ diff := dec.cursor - start
+ dec.data = append(append(dec.data[:start-1], str...), dec.data[dec.cursor:]...)
+ dec.length = len(dec.data)
+ dec.cursor += len(str) - diff - 1
+
+ return nil
+ default:
+ return dec.raiseInvalidJSONErr(dec.cursor)
+ }
+
+ dec.data = append(dec.data[:dec.cursor-1], dec.data[dec.cursor:]...)
+ dec.length--
+
+ // Since we've lost a character, our dec.cursor offset is now
+ // 1 past the escaped character which is precisely where we
+ // want it.
+
+ return nil
+}
+
+func (dec *Decoder) getString() (int, int, error) {
+ // extract key
+ var keyStart = dec.cursor
+ // var str *Builder
+ for dec.cursor < dec.length || dec.read() {
+ switch dec.data[dec.cursor] {
+ // string found
+ case '"':
+ dec.cursor = dec.cursor + 1
+ return keyStart, dec.cursor, nil
+ // slash found
+ case '\\':
+ dec.cursor = dec.cursor + 1
+ err := dec.parseEscapedString()
+ if err != nil {
+ return 0, 0, err
+ }
+ default:
+ dec.cursor = dec.cursor + 1
+ continue
+ }
+ }
+ return 0, 0, dec.raiseInvalidJSONErr(dec.cursor)
+}
+
+func (dec *Decoder) skipEscapedString() error {
+ start := dec.cursor
+ for ; dec.cursor < dec.length || dec.read(); dec.cursor++ {
+ if dec.data[dec.cursor] != '\\' {
+ d := dec.data[dec.cursor]
+ dec.cursor = dec.cursor + 1
+ nSlash := dec.cursor - start
+ switch d {
+ case '"':
+ // nSlash must be odd
+ if nSlash&1 != 1 {
+ return dec.raiseInvalidJSONErr(dec.cursor)
+ }
+ return nil
+ case 'u': // is unicode, we skip the following characters and place the cursor one one byte backward to avoid it breaking when returning to skipString
+ if err := dec.skipString(); err != nil {
+ return err
+ }
+ dec.cursor--
+ return nil
+ case 'n', 'r', 't', '/', 'f', 'b':
+ return nil
+ default:
+ // nSlash must be even
+ if nSlash&1 == 1 {
+ return dec.raiseInvalidJSONErr(dec.cursor)
+ }
+ return nil
+ }
+ }
+ }
+ return dec.raiseInvalidJSONErr(dec.cursor)
+}
+
+func (dec *Decoder) skipString() error {
+ for dec.cursor < dec.length || dec.read() {
+ switch dec.data[dec.cursor] {
+ // found the closing quote
+ // let's return
+ case '"':
+ dec.cursor = dec.cursor + 1
+ return nil
+ // solidus found start parsing an escaped string
+ case '\\':
+ dec.cursor = dec.cursor + 1
+ err := dec.skipEscapedString()
+ if err != nil {
+ return err
+ }
+ default:
+ dec.cursor = dec.cursor + 1
+ continue
+ }
+ }
+ return dec.raiseInvalidJSONErr(len(dec.data) - 1)
+}
+
+// Add Values functions
+
+// AddString decodes the JSON value within an object or an array to a *string.
+// If next key is not a JSON string nor null, InvalidUnmarshalError will be returned.
+func (dec *Decoder) AddString(v *string) error {
+ return dec.String(v)
+}
+
+// AddStringNull decodes the JSON value within an object or an array to a *string.
+// If next key is not a JSON string nor null, InvalidUnmarshalError will be returned.
+// If a `null` is encountered, gojay does not change the value of the pointer.
+func (dec *Decoder) AddStringNull(v **string) error {
+ return dec.StringNull(v)
+}
+
+// String decodes the JSON value within an object or an array to a *string.
+// If next key is not a JSON string nor null, InvalidUnmarshalError will be returned.
+func (dec *Decoder) String(v *string) error {
+ err := dec.decodeString(v)
+ if err != nil {
+ return err
+ }
+ dec.called |= 1
+ return nil
+}
+
+// StringNull decodes the JSON value within an object or an array to a **string.
+// If next key is not a JSON string nor null, InvalidUnmarshalError will be returned.
+// If a `null` is encountered, gojay does not change the value of the pointer.
+func (dec *Decoder) StringNull(v **string) error {
+ err := dec.decodeStringNull(v)
+ if err != nil {
+ return err
+ }
+ dec.called |= 1
+ return nil
+}