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author | 2025-03-09 17:47:56 +0100 | |
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committer | 2025-03-10 01:59:49 +0100 | |
commit | 3ac1ee16f377d31a0fb80c8dae28b6239ac4229e (patch) | |
tree | f61faa581feaaeaba2542b9f2b8234a590684413 /vendor/google.golang.org/protobuf/internal/encoding/json/decode.go | |
parent | [chore] update URLs to forked source (diff) | |
download | gotosocial-3ac1ee16f377d31a0fb80c8dae28b6239ac4229e.tar.xz |
[chore] remove vendor
Diffstat (limited to 'vendor/google.golang.org/protobuf/internal/encoding/json/decode.go')
-rw-r--r-- | vendor/google.golang.org/protobuf/internal/encoding/json/decode.go | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/json/decode.go b/vendor/google.golang.org/protobuf/internal/encoding/json/decode.go deleted file mode 100644 index ea1d3e65a..000000000 --- a/vendor/google.golang.org/protobuf/internal/encoding/json/decode.go +++ /dev/null @@ -1,340 +0,0 @@ -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package json - -import ( - "bytes" - "fmt" - "io" - "regexp" - "unicode/utf8" - - "google.golang.org/protobuf/internal/errors" -) - -// call specifies which Decoder method was invoked. -type call uint8 - -const ( - readCall call = iota - peekCall -) - -const unexpectedFmt = "unexpected token %s" - -// ErrUnexpectedEOF means that EOF was encountered in the middle of the input. -var ErrUnexpectedEOF = errors.New("%v", io.ErrUnexpectedEOF) - -// Decoder is a token-based JSON decoder. -type Decoder struct { - // lastCall is last method called, either readCall or peekCall. - // Initial value is readCall. - lastCall call - - // lastToken contains the last read token. - lastToken Token - - // lastErr contains the last read error. - lastErr error - - // openStack is a stack containing ObjectOpen and ArrayOpen values. The - // top of stack represents the object or the array the current value is - // directly located in. - openStack []Kind - - // orig is used in reporting line and column. - orig []byte - // in contains the unconsumed input. - in []byte -} - -// NewDecoder returns a Decoder to read the given []byte. -func NewDecoder(b []byte) *Decoder { - return &Decoder{orig: b, in: b} -} - -// Peek looks ahead and returns the next token kind without advancing a read. -func (d *Decoder) Peek() (Token, error) { - defer func() { d.lastCall = peekCall }() - if d.lastCall == readCall { - d.lastToken, d.lastErr = d.Read() - } - return d.lastToken, d.lastErr -} - -// Read returns the next JSON token. -// It will return an error if there is no valid token. -func (d *Decoder) Read() (Token, error) { - const scalar = Null | Bool | Number | String - - defer func() { d.lastCall = readCall }() - if d.lastCall == peekCall { - return d.lastToken, d.lastErr - } - - tok, err := d.parseNext() - if err != nil { - return Token{}, err - } - - switch tok.kind { - case EOF: - if len(d.openStack) != 0 || - d.lastToken.kind&scalar|ObjectClose|ArrayClose == 0 { - return Token{}, ErrUnexpectedEOF - } - - case Null: - if !d.isValueNext() { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - - case Bool, Number: - if !d.isValueNext() { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - - case String: - if d.isValueNext() { - break - } - // This string token should only be for a field name. - if d.lastToken.kind&(ObjectOpen|comma) == 0 { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - if len(d.in) == 0 { - return Token{}, ErrUnexpectedEOF - } - if c := d.in[0]; c != ':' { - return Token{}, d.newSyntaxError(d.currPos(), `unexpected character %s, missing ":" after field name`, string(c)) - } - tok.kind = Name - d.consume(1) - - case ObjectOpen, ArrayOpen: - if !d.isValueNext() { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - d.openStack = append(d.openStack, tok.kind) - - case ObjectClose: - if len(d.openStack) == 0 || - d.lastToken.kind&(Name|comma) != 0 || - d.openStack[len(d.openStack)-1] != ObjectOpen { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - d.openStack = d.openStack[:len(d.openStack)-1] - - case ArrayClose: - if len(d.openStack) == 0 || - d.lastToken.kind == comma || - d.openStack[len(d.openStack)-1] != ArrayOpen { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - d.openStack = d.openStack[:len(d.openStack)-1] - - case comma: - if len(d.openStack) == 0 || - d.lastToken.kind&(scalar|ObjectClose|ArrayClose) == 0 { - return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString()) - } - } - - // Update d.lastToken only after validating token to be in the right sequence. - d.lastToken = tok - - if d.lastToken.kind == comma { - return d.Read() - } - return tok, nil -} - -// Any sequence that looks like a non-delimiter (for error reporting). -var errRegexp = regexp.MustCompile(`^([-+._a-zA-Z0-9]{1,32}|.)`) - -// parseNext parses for the next JSON token. It returns a Token object for -// different types, except for Name. It does not handle whether the next token -// is in a valid sequence or not. -func (d *Decoder) parseNext() (Token, error) { - // Trim leading spaces. - d.consume(0) - - in := d.in - if len(in) == 0 { - return d.consumeToken(EOF, 0), nil - } - - switch in[0] { - case 'n': - if n := matchWithDelim("null", in); n != 0 { - return d.consumeToken(Null, n), nil - } - - case 't': - if n := matchWithDelim("true", in); n != 0 { - return d.consumeBoolToken(true, n), nil - } - - case 'f': - if n := matchWithDelim("false", in); n != 0 { - return d.consumeBoolToken(false, n), nil - } - - case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': - if n, ok := parseNumber(in); ok { - return d.consumeToken(Number, n), nil - } - - case '"': - s, n, err := d.parseString(in) - if err != nil { - return Token{}, err - } - return d.consumeStringToken(s, n), nil - - case '{': - return d.consumeToken(ObjectOpen, 1), nil - - case '}': - return d.consumeToken(ObjectClose, 1), nil - - case '[': - return d.consumeToken(ArrayOpen, 1), nil - - case ']': - return d.consumeToken(ArrayClose, 1), nil - - case ',': - return d.consumeToken(comma, 1), nil - } - return Token{}, d.newSyntaxError(d.currPos(), "invalid value %s", errRegexp.Find(in)) -} - -// newSyntaxError returns an error with line and column information useful for -// syntax errors. -func (d *Decoder) newSyntaxError(pos int, f string, x ...any) error { - e := errors.New(f, x...) - line, column := d.Position(pos) - return errors.New("syntax error (line %d:%d): %v", line, column, e) -} - -// Position returns line and column number of given index of the original input. -// It will panic if index is out of range. -func (d *Decoder) Position(idx int) (line int, column int) { - b := d.orig[:idx] - line = bytes.Count(b, []byte("\n")) + 1 - if i := bytes.LastIndexByte(b, '\n'); i >= 0 { - b = b[i+1:] - } - column = utf8.RuneCount(b) + 1 // ignore multi-rune characters - return line, column -} - -// currPos returns the current index position of d.in from d.orig. -func (d *Decoder) currPos() int { - return len(d.orig) - len(d.in) -} - -// matchWithDelim matches s with the input b and verifies that the match -// terminates with a delimiter of some form (e.g., r"[^-+_.a-zA-Z0-9]"). -// As a special case, EOF is considered a delimiter. It returns the length of s -// if there is a match, else 0. -func matchWithDelim(s string, b []byte) int { - if !bytes.HasPrefix(b, []byte(s)) { - return 0 - } - - n := len(s) - if n < len(b) && isNotDelim(b[n]) { - return 0 - } - return n -} - -// isNotDelim returns true if given byte is a not delimiter character. -func isNotDelim(c byte) bool { - return (c == '-' || c == '+' || c == '.' || c == '_' || - ('a' <= c && c <= 'z') || - ('A' <= c && c <= 'Z') || - ('0' <= c && c <= '9')) -} - -// consume consumes n bytes of input and any subsequent whitespace. -func (d *Decoder) consume(n int) { - d.in = d.in[n:] - for len(d.in) > 0 { - switch d.in[0] { - case ' ', '\n', '\r', '\t': - d.in = d.in[1:] - default: - return - } - } -} - -// isValueNext returns true if next type should be a JSON value: Null, -// Number, String or Bool. -func (d *Decoder) isValueNext() bool { - if len(d.openStack) == 0 { - return d.lastToken.kind == 0 - } - - start := d.openStack[len(d.openStack)-1] - switch start { - case ObjectOpen: - return d.lastToken.kind&Name != 0 - case ArrayOpen: - return d.lastToken.kind&(ArrayOpen|comma) != 0 - } - panic(fmt.Sprintf( - "unreachable logic in Decoder.isValueNext, lastToken.kind: %v, openStack: %v", - d.lastToken.kind, start)) -} - -// consumeToken constructs a Token for given Kind with raw value derived from -// current d.in and given size, and consumes the given size-length of it. -func (d *Decoder) consumeToken(kind Kind, size int) Token { - tok := Token{ - kind: kind, - raw: d.in[:size], - pos: len(d.orig) - len(d.in), - } - d.consume(size) - return tok -} - -// consumeBoolToken constructs a Token for a Bool kind with raw value derived from -// current d.in and given size. -func (d *Decoder) consumeBoolToken(b bool, size int) Token { - tok := Token{ - kind: Bool, - raw: d.in[:size], - pos: len(d.orig) - len(d.in), - boo: b, - } - d.consume(size) - return tok -} - -// consumeStringToken constructs a Token for a String kind with raw value derived -// from current d.in and given size. -func (d *Decoder) consumeStringToken(s string, size int) Token { - tok := Token{ - kind: String, - raw: d.in[:size], - pos: len(d.orig) - len(d.in), - str: s, - } - d.consume(size) - return tok -} - -// Clone returns a copy of the Decoder for use in reading ahead the next JSON -// object, array or other values without affecting current Decoder. -func (d *Decoder) Clone() *Decoder { - ret := *d - ret.openStack = append([]Kind(nil), ret.openStack...) - return &ret -} |