From 4e50fd864921c556988c919269448efdb90fa961 Mon Sep 17 00:00:00 2001 From: Wim Date: Mon, 10 Aug 2020 00:29:54 +0200 Subject: Use mattermost v5 module (#1192) --- .../github.com/francoispqt/gojay/decode_string.go | 260 +++++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 vendor/github.com/francoispqt/gojay/decode_string.go (limited to 'vendor/github.com/francoispqt/gojay/decode_string.go') 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 +} -- cgit v1.2.3