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// |
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// Copyright (c) 2011-2019 Canonical Ltd |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package yaml |
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import ( |
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"encoding" |
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"encoding/base64" |
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"fmt" |
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"io" |
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"math" |
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"reflect" |
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"strconv" |
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"time" |
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) |
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// ---------------------------------------------------------------------------- |
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// Parser, produces a node tree out of a libyaml event stream. |
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type parser struct { |
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parser yaml_parser_t |
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event yaml_event_t |
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doc *Node |
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anchors map[string]*Node |
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doneInit bool |
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textless bool |
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} |
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func newParser(b []byte) *parser { |
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p := parser{} |
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if !yaml_parser_initialize(&p.parser) { |
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panic("failed to initialize YAML emitter") |
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} |
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if len(b) == 0 { |
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b = []byte{'\n'} |
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} |
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yaml_parser_set_input_string(&p.parser, b) |
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return &p |
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} |
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func newParserFromReader(r io.Reader) *parser { |
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p := parser{} |
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if !yaml_parser_initialize(&p.parser) { |
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panic("failed to initialize YAML emitter") |
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} |
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yaml_parser_set_input_reader(&p.parser, r) |
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return &p |
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} |
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func (p *parser) init() { |
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if p.doneInit { |
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return |
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} |
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p.anchors = make(map[string]*Node) |
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p.expect(yaml_STREAM_START_EVENT) |
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p.doneInit = true |
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} |
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func (p *parser) destroy() { |
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if p.event.typ != yaml_NO_EVENT { |
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yaml_event_delete(&p.event) |
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} |
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yaml_parser_delete(&p.parser) |
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} |
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// expect consumes an event from the event stream and |
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// checks that it's of the expected type. |
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func (p *parser) expect(e yaml_event_type_t) { |
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if p.event.typ == yaml_NO_EVENT { |
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if !yaml_parser_parse(&p.parser, &p.event) { |
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p.fail() |
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} |
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} |
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if p.event.typ == yaml_STREAM_END_EVENT { |
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failf("attempted to go past the end of stream; corrupted value?") |
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} |
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if p.event.typ != e { |
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p.parser.problem = fmt.Sprintf("expected %s event but got %s", e, p.event.typ) |
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p.fail() |
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} |
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yaml_event_delete(&p.event) |
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p.event.typ = yaml_NO_EVENT |
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} |
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// peek peeks at the next event in the event stream, |
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// puts the results into p.event and returns the event type. |
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func (p *parser) peek() yaml_event_type_t { |
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if p.event.typ != yaml_NO_EVENT { |
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return p.event.typ |
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} |
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if !yaml_parser_parse(&p.parser, &p.event) { |
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p.fail() |
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} |
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return p.event.typ |
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} |
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func (p *parser) fail() { |
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var where string |
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var line int |
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if p.parser.context_mark.line != 0 { |
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line = p.parser.context_mark.line |
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// Scanner errors don't iterate line before returning error |
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if p.parser.error == yaml_SCANNER_ERROR { |
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line++ |
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} |
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} else if p.parser.problem_mark.line != 0 { |
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line = p.parser.problem_mark.line |
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// Scanner errors don't iterate line before returning error |
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if p.parser.error == yaml_SCANNER_ERROR { |
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line++ |
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} |
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} |
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if line != 0 { |
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where = "line " + strconv.Itoa(line) + ": " |
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} |
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var msg string |
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if len(p.parser.problem) > 0 { |
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msg = p.parser.problem |
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} else { |
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msg = "unknown problem parsing YAML content" |
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} |
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failf("%s%s", where, msg) |
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} |
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func (p *parser) anchor(n *Node, anchor []byte) { |
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if anchor != nil { |
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n.Anchor = string(anchor) |
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p.anchors[n.Anchor] = n |
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} |
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} |
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func (p *parser) parse() *Node { |
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p.init() |
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switch p.peek() { |
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case yaml_SCALAR_EVENT: |
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return p.scalar() |
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case yaml_ALIAS_EVENT: |
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return p.alias() |
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case yaml_MAPPING_START_EVENT: |
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return p.mapping() |
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case yaml_SEQUENCE_START_EVENT: |
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return p.sequence() |
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case yaml_DOCUMENT_START_EVENT: |
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return p.document() |
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case yaml_STREAM_END_EVENT: |
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// Happens when attempting to decode an empty buffer. |
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return nil |
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case yaml_TAIL_COMMENT_EVENT: |
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panic("internal error: unexpected tail comment event (please report)") |
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default: |
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panic("internal error: attempted to parse unknown event (please report): " + p.event.typ.String()) |
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} |
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} |
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func (p *parser) node(kind Kind, defaultTag, tag, value string) *Node { |
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var style Style |
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if tag != "" && tag != "!" { |
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tag = shortTag(tag) |
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style = TaggedStyle |
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} else if defaultTag != "" { |
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tag = defaultTag |
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} else if kind == ScalarNode { |
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tag, _ = resolve("", value) |
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} |
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n := &Node{ |
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Kind: kind, |
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Tag: tag, |
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Value: value, |
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Style: style, |
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} |
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if !p.textless { |
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n.Line = p.event.start_mark.line + 1 |
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n.Column = p.event.start_mark.column + 1 |
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n.HeadComment = string(p.event.head_comment) |
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n.LineComment = string(p.event.line_comment) |
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n.FootComment = string(p.event.foot_comment) |
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} |
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return n |
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} |
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func (p *parser) parseChild(parent *Node) *Node { |
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child := p.parse() |
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parent.Content = append(parent.Content, child) |
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return child |
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} |
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func (p *parser) document() *Node { |
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n := p.node(DocumentNode, "", "", "") |
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p.doc = n |
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p.expect(yaml_DOCUMENT_START_EVENT) |
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p.parseChild(n) |
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if p.peek() == yaml_DOCUMENT_END_EVENT { |
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n.FootComment = string(p.event.foot_comment) |
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} |
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p.expect(yaml_DOCUMENT_END_EVENT) |
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return n |
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} |
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func (p *parser) alias() *Node { |
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n := p.node(AliasNode, "", "", string(p.event.anchor)) |
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n.Alias = p.anchors[n.Value] |
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if n.Alias == nil { |
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failf("unknown anchor '%s' referenced", n.Value) |
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} |
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p.expect(yaml_ALIAS_EVENT) |
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return n |
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} |
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func (p *parser) scalar() *Node { |
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var parsedStyle = p.event.scalar_style() |
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var nodeStyle Style |
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switch { |
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case parsedStyle&yaml_DOUBLE_QUOTED_SCALAR_STYLE != 0: |
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nodeStyle = DoubleQuotedStyle |
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case parsedStyle&yaml_SINGLE_QUOTED_SCALAR_STYLE != 0: |
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nodeStyle = SingleQuotedStyle |
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case parsedStyle&yaml_LITERAL_SCALAR_STYLE != 0: |
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nodeStyle = LiteralStyle |
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case parsedStyle&yaml_FOLDED_SCALAR_STYLE != 0: |
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nodeStyle = FoldedStyle |
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} |
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var nodeValue = string(p.event.value) |
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var nodeTag = string(p.event.tag) |
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var defaultTag string |
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if nodeStyle == 0 { |
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if nodeValue == "<<" { |
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defaultTag = mergeTag |
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} |
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} else { |
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defaultTag = strTag |
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} |
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n := p.node(ScalarNode, defaultTag, nodeTag, nodeValue) |
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n.Style |= nodeStyle |
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p.anchor(n, p.event.anchor) |
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p.expect(yaml_SCALAR_EVENT) |
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return n |
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} |
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func (p *parser) sequence() *Node { |
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n := p.node(SequenceNode, seqTag, string(p.event.tag), "") |
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if p.event.sequence_style()&yaml_FLOW_SEQUENCE_STYLE != 0 { |
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n.Style |= FlowStyle |
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} |
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p.anchor(n, p.event.anchor) |
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p.expect(yaml_SEQUENCE_START_EVENT) |
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for p.peek() != yaml_SEQUENCE_END_EVENT { |
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p.parseChild(n) |
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} |
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n.LineComment = string(p.event.line_comment) |
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n.FootComment = string(p.event.foot_comment) |
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p.expect(yaml_SEQUENCE_END_EVENT) |
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return n |
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} |
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func (p *parser) mapping() *Node { |
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n := p.node(MappingNode, mapTag, string(p.event.tag), "") |
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block := true |
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if p.event.mapping_style()&yaml_FLOW_MAPPING_STYLE != 0 { |
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block = false |
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n.Style |= FlowStyle |
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} |
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p.anchor(n, p.event.anchor) |
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p.expect(yaml_MAPPING_START_EVENT) |
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for p.peek() != yaml_MAPPING_END_EVENT { |
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k := p.parseChild(n) |
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if block && k.FootComment != "" { |
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// Must be a foot comment for the prior value when being dedented. |
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if len(n.Content) > 2 { |
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n.Content[len(n.Content)-3].FootComment = k.FootComment |
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k.FootComment = "" |
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} |
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} |
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v := p.parseChild(n) |
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if k.FootComment == "" && v.FootComment != "" { |
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k.FootComment = v.FootComment |
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v.FootComment = "" |
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} |
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if p.peek() == yaml_TAIL_COMMENT_EVENT { |
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if k.FootComment == "" { |
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k.FootComment = string(p.event.foot_comment) |
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} |
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p.expect(yaml_TAIL_COMMENT_EVENT) |
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} |
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} |
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n.LineComment = string(p.event.line_comment) |
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n.FootComment = string(p.event.foot_comment) |
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if n.Style&FlowStyle == 0 && n.FootComment != "" && len(n.Content) > 1 { |
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n.Content[len(n.Content)-2].FootComment = n.FootComment |
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n.FootComment = "" |
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} |
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p.expect(yaml_MAPPING_END_EVENT) |
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return n |
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} |
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// ---------------------------------------------------------------------------- |
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// Decoder, unmarshals a node into a provided value. |
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type decoder struct { |
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doc *Node |
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aliases map[*Node]bool |
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terrors []string |
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stringMapType reflect.Type |
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generalMapType reflect.Type |
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knownFields bool |
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uniqueKeys bool |
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decodeCount int |
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aliasCount int |
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aliasDepth int |
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} |
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var ( |
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nodeType = reflect.TypeOf(Node{}) |
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durationType = reflect.TypeOf(time.Duration(0)) |
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stringMapType = reflect.TypeOf(map[string]interface{}{}) |
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generalMapType = reflect.TypeOf(map[interface{}]interface{}{}) |
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ifaceType = generalMapType.Elem() |
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timeType = reflect.TypeOf(time.Time{}) |
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ptrTimeType = reflect.TypeOf(&time.Time{}) |
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) |
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func newDecoder() *decoder { |
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d := &decoder{ |
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stringMapType: stringMapType, |
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generalMapType: generalMapType, |
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uniqueKeys: true, |
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} |
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d.aliases = make(map[*Node]bool) |
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return d |
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} |
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func (d *decoder) terror(n *Node, tag string, out reflect.Value) { |
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if n.Tag != "" { |
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tag = n.Tag |
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} |
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value := n.Value |
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if tag != seqTag && tag != mapTag { |
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if len(value) > 10 { |
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value = " `" + value[:7] + "...`" |
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} else { |
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value = " `" + value + "`" |
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} |
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} |
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d.terrors = append(d.terrors, fmt.Sprintf("line %d: cannot unmarshal %s%s into %s", n.Line, shortTag(tag), value, out.Type())) |
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} |
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359 |
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func (d *decoder) callUnmarshaler(n *Node, u Unmarshaler) (good bool) { |
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err := u.UnmarshalYAML(n) |
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if e, ok := err.(*TypeError); ok { |
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d.terrors = append(d.terrors, e.Errors...) |
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return false |
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} |
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if err != nil { |
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fail(err) |
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} |
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return true |
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} |
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func (d *decoder) callObsoleteUnmarshaler(n *Node, u obsoleteUnmarshaler) (good bool) { |
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terrlen := len(d.terrors) |
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err := u.UnmarshalYAML(func(v interface{}) (err error) { |
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defer handleErr(&err) |
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d.unmarshal(n, reflect.ValueOf(v)) |
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if len(d.terrors) > terrlen { |
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issues := d.terrors[terrlen:] |
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d.terrors = d.terrors[:terrlen] |
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return &TypeError{issues} |
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} |
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return nil |
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}) |
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if e, ok := err.(*TypeError); ok { |
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d.terrors = append(d.terrors, e.Errors...) |
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return false |
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} |
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if err != nil { |
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fail(err) |
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} |
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return true |
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392 |
} |
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|
393 |
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394 |
// d.prepare initializes and dereferences pointers and calls UnmarshalYAML |
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395 |
// if a value is found to implement it. |
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396 |
// It returns the initialized and dereferenced out value, whether |
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397 |
// unmarshalling was already done by UnmarshalYAML, and if so whether |
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// its types unmarshalled appropriately. |
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399 |
// |
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400 |
// If n holds a null value, prepare returns before doing anything. |
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|
401 |
func (d *decoder) prepare(n *Node, out reflect.Value) (newout reflect.Value, unmarshaled, good bool) { |
|
|
402 |
if n.ShortTag() == nullTag { |
|
|
403 |
return out, false, false |
|
|
404 |
} |
|
|
405 |
again := true |
|
|
406 |
for again { |
|
|
407 |
again = false |
|
|
408 |
if out.Kind() == reflect.Ptr { |
|
|
409 |
if out.IsNil() { |
|
|
410 |
out.Set(reflect.New(out.Type().Elem())) |
|
|
411 |
} |
|
|
412 |
out = out.Elem() |
|
|
413 |
again = true |
|
|
414 |
} |
|
|
415 |
if out.CanAddr() { |
|
|
416 |
outi := out.Addr().Interface() |
|
|
417 |
if u, ok := outi.(Unmarshaler); ok { |
|
|
418 |
good = d.callUnmarshaler(n, u) |
|
|
419 |
return out, true, good |
|
|
420 |
} |
|
|
421 |
if u, ok := outi.(obsoleteUnmarshaler); ok { |
|
|
422 |
good = d.callObsoleteUnmarshaler(n, u) |
|
|
423 |
return out, true, good |
|
|
424 |
} |
|
|
425 |
} |
|
|
426 |
} |
|
|
427 |
return out, false, false |
|
|
428 |
} |
|
|
429 |
|
|
|
430 |
func (d *decoder) fieldByIndex(n *Node, v reflect.Value, index []int) (field reflect.Value) { |
|
|
431 |
if n.ShortTag() == nullTag { |
|
|
432 |
return reflect.Value{} |
|
|
433 |
} |
|
|
434 |
for _, num := range index { |
|
|
435 |
for { |
|
|
436 |
if v.Kind() == reflect.Ptr { |
|
|
437 |
if v.IsNil() { |
|
|
438 |
v.Set(reflect.New(v.Type().Elem())) |
|
|
439 |
} |
|
|
440 |
v = v.Elem() |
|
|
441 |
continue |
|
|
442 |
} |
|
|
443 |
break |
|
|
444 |
} |
|
|
445 |
v = v.Field(num) |
|
|
446 |
} |
|
|
447 |
return v |
|
|
448 |
} |
|
|
449 |
|
|
|
450 |
const ( |
|
|
451 |
// 400,000 decode operations is ~500kb of dense object declarations, or |
|
|
452 |
// ~5kb of dense object declarations with 10000% alias expansion |
|
|
453 |
alias_ratio_range_low = 400000 |
|
|
454 |
|
|
|
455 |
// 4,000,000 decode operations is ~5MB of dense object declarations, or |
|
|
456 |
// ~4.5MB of dense object declarations with 10% alias expansion |
|
|
457 |
alias_ratio_range_high = 4000000 |
|
|
458 |
|
|
|
459 |
// alias_ratio_range is the range over which we scale allowed alias ratios |
|
|
460 |
alias_ratio_range = float64(alias_ratio_range_high - alias_ratio_range_low) |
|
|
461 |
) |
|
|
462 |
|
|
|
463 |
func allowedAliasRatio(decodeCount int) float64 { |
|
|
464 |
switch { |
|
|
465 |
case decodeCount <= alias_ratio_range_low: |
|
|
466 |
// allow 99% to come from alias expansion for small-to-medium documents |
|
|
467 |
return 0.99 |
|
|
468 |
case decodeCount >= alias_ratio_range_high: |
|
|
469 |
// allow 10% to come from alias expansion for very large documents |
|
|
470 |
return 0.10 |
|
|
471 |
default: |
|
|
472 |
// scale smoothly from 99% down to 10% over the range. |
|
|
473 |
// this maps to 396,000 - 400,000 allowed alias-driven decodes over the range. |
|
|
474 |
// 400,000 decode operations is ~100MB of allocations in worst-case scenarios (single-item maps). |
|
|
475 |
return 0.99 - 0.89*(float64(decodeCount-alias_ratio_range_low)/alias_ratio_range) |
|
|
476 |
} |
|
|
477 |
} |
|
|
478 |
|
|
|
479 |
func (d *decoder) unmarshal(n *Node, out reflect.Value) (good bool) { |
|
|
480 |
d.decodeCount++ |
|
|
481 |
if d.aliasDepth > 0 { |
|
|
482 |
d.aliasCount++ |
|
|
483 |
} |
|
|
484 |
if d.aliasCount > 100 && d.decodeCount > 1000 && float64(d.aliasCount)/float64(d.decodeCount) > allowedAliasRatio(d.decodeCount) { |
|
|
485 |
failf("document contains excessive aliasing") |
|
|
486 |
} |
|
|
487 |
if out.Type() == nodeType { |
|
|
488 |
out.Set(reflect.ValueOf(n).Elem()) |
|
|
489 |
return true |
|
|
490 |
} |
|
|
491 |
switch n.Kind { |
|
|
492 |
case DocumentNode: |
|
|
493 |
return d.document(n, out) |
|
|
494 |
case AliasNode: |
|
|
495 |
return d.alias(n, out) |
|
|
496 |
} |
|
|
497 |
out, unmarshaled, good := d.prepare(n, out) |
|
|
498 |
if unmarshaled { |
|
|
499 |
return good |
|
|
500 |
} |
|
|
501 |
switch n.Kind { |
|
|
502 |
case ScalarNode: |
|
|
503 |
good = d.scalar(n, out) |
|
|
504 |
case MappingNode: |
|
|
505 |
good = d.mapping(n, out) |
|
|
506 |
case SequenceNode: |
|
|
507 |
good = d.sequence(n, out) |
|
|
508 |
case 0: |
|
|
509 |
if n.IsZero() { |
|
|
510 |
return d.null(out) |
|
|
511 |
} |
|
|
512 |
fallthrough |
|
|
513 |
default: |
|
|
514 |
failf("cannot decode node with unknown kind %d", n.Kind) |
|
|
515 |
} |
|
|
516 |
return good |
|
|
517 |
} |
|
|
518 |
|
|
|
519 |
func (d *decoder) document(n *Node, out reflect.Value) (good bool) { |
|
|
520 |
if len(n.Content) == 1 { |
|
|
521 |
d.doc = n |
|
|
522 |
d.unmarshal(n.Content[0], out) |
|
|
523 |
return true |
|
|
524 |
} |
|
|
525 |
return false |
|
|
526 |
} |
|
|
527 |
|
|
|
528 |
func (d *decoder) alias(n *Node, out reflect.Value) (good bool) { |
|
|
529 |
if d.aliases[n] { |
|
|
530 |
// TODO this could actually be allowed in some circumstances. |
|
|
531 |
failf("anchor '%s' value contains itself", n.Value) |
|
|
532 |
} |
|
|
533 |
d.aliases[n] = true |
|
|
534 |
d.aliasDepth++ |
|
|
535 |
good = d.unmarshal(n.Alias, out) |
|
|
536 |
d.aliasDepth-- |
|
|
537 |
delete(d.aliases, n) |
|
|
538 |
return good |
|
|
539 |
} |
|
|
540 |
|
|
|
541 |
var zeroValue reflect.Value |
|
|
542 |
|
|
|
543 |
func resetMap(out reflect.Value) { |
|
|
544 |
for _, k := range out.MapKeys() { |
|
|
545 |
out.SetMapIndex(k, zeroValue) |
|
|
546 |
} |
|
|
547 |
} |
|
|
548 |
|
|
|
549 |
func (d *decoder) null(out reflect.Value) bool { |
|
|
550 |
if out.CanAddr() { |
|
|
551 |
switch out.Kind() { |
|
|
552 |
case reflect.Interface, reflect.Ptr, reflect.Map, reflect.Slice: |
|
|
553 |
out.Set(reflect.Zero(out.Type())) |
|
|
554 |
return true |
|
|
555 |
} |
|
|
556 |
} |
|
|
557 |
return false |
|
|
558 |
} |
|
|
559 |
|
|
|
560 |
func (d *decoder) scalar(n *Node, out reflect.Value) bool { |
|
|
561 |
var tag string |
|
|
562 |
var resolved interface{} |
|
|
563 |
if n.indicatedString() { |
|
|
564 |
tag = strTag |
|
|
565 |
resolved = n.Value |
|
|
566 |
} else { |
|
|
567 |
tag, resolved = resolve(n.Tag, n.Value) |
|
|
568 |
if tag == binaryTag { |
|
|
569 |
data, err := base64.StdEncoding.DecodeString(resolved.(string)) |
|
|
570 |
if err != nil { |
|
|
571 |
failf("!!binary value contains invalid base64 data") |
|
|
572 |
} |
|
|
573 |
resolved = string(data) |
|
|
574 |
} |
|
|
575 |
} |
|
|
576 |
if resolved == nil { |
|
|
577 |
return d.null(out) |
|
|
578 |
} |
|
|
579 |
if resolvedv := reflect.ValueOf(resolved); out.Type() == resolvedv.Type() { |
|
|
580 |
// We've resolved to exactly the type we want, so use that. |
|
|
581 |
out.Set(resolvedv) |
|
|
582 |
return true |
|
|
583 |
} |
|
|
584 |
// Perhaps we can use the value as a TextUnmarshaler to |
|
|
585 |
// set its value. |
|
|
586 |
if out.CanAddr() { |
|
|
587 |
u, ok := out.Addr().Interface().(encoding.TextUnmarshaler) |
|
|
588 |
if ok { |
|
|
589 |
var text []byte |
|
|
590 |
if tag == binaryTag { |
|
|
591 |
text = []byte(resolved.(string)) |
|
|
592 |
} else { |
|
|
593 |
// We let any value be unmarshaled into TextUnmarshaler. |
|
|
594 |
// That might be more lax than we'd like, but the |
|
|
595 |
// TextUnmarshaler itself should bowl out any dubious values. |
|
|
596 |
text = []byte(n.Value) |
|
|
597 |
} |
|
|
598 |
err := u.UnmarshalText(text) |
|
|
599 |
if err != nil { |
|
|
600 |
fail(err) |
|
|
601 |
} |
|
|
602 |
return true |
|
|
603 |
} |
|
|
604 |
} |
|
|
605 |
switch out.Kind() { |
|
|
606 |
case reflect.String: |
|
|
607 |
if tag == binaryTag { |
|
|
608 |
out.SetString(resolved.(string)) |
|
|
609 |
return true |
|
|
610 |
} |
|
|
611 |
out.SetString(n.Value) |
|
|
612 |
return true |
|
|
613 |
case reflect.Interface: |
|
|
614 |
out.Set(reflect.ValueOf(resolved)) |
|
|
615 |
return true |
|
|
616 |
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
|
|
617 |
// This used to work in v2, but it's very unfriendly. |
|
|
618 |
isDuration := out.Type() == durationType |
|
|
619 |
|
|
|
620 |
switch resolved := resolved.(type) { |
|
|
621 |
case int: |
|
|
622 |
if !isDuration && !out.OverflowInt(int64(resolved)) { |
|
|
623 |
out.SetInt(int64(resolved)) |
|
|
624 |
return true |
|
|
625 |
} |
|
|
626 |
case int64: |
|
|
627 |
if !isDuration && !out.OverflowInt(resolved) { |
|
|
628 |
out.SetInt(resolved) |
|
|
629 |
return true |
|
|
630 |
} |
|
|
631 |
case uint64: |
|
|
632 |
if !isDuration && resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) { |
|
|
633 |
out.SetInt(int64(resolved)) |
|
|
634 |
return true |
|
|
635 |
} |
|
|
636 |
case float64: |
|
|
637 |
if !isDuration && resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) { |
|
|
638 |
out.SetInt(int64(resolved)) |
|
|
639 |
return true |
|
|
640 |
} |
|
|
641 |
case string: |
|
|
642 |
if out.Type() == durationType { |
|
|
643 |
d, err := time.ParseDuration(resolved) |
|
|
644 |
if err == nil { |
|
|
645 |
out.SetInt(int64(d)) |
|
|
646 |
return true |
|
|
647 |
} |
|
|
648 |
} |
|
|
649 |
} |
|
|
650 |
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
|
|
651 |
switch resolved := resolved.(type) { |
|
|
652 |
case int: |
|
|
653 |
if resolved >= 0 && !out.OverflowUint(uint64(resolved)) { |
|
|
654 |
out.SetUint(uint64(resolved)) |
|
|
655 |
return true |
|
|
656 |
} |
|
|
657 |
case int64: |
|
|
658 |
if resolved >= 0 && !out.OverflowUint(uint64(resolved)) { |
|
|
659 |
out.SetUint(uint64(resolved)) |
|
|
660 |
return true |
|
|
661 |
} |
|
|
662 |
case uint64: |
|
|
663 |
if !out.OverflowUint(uint64(resolved)) { |
|
|
664 |
out.SetUint(uint64(resolved)) |
|
|
665 |
return true |
|
|
666 |
} |
|
|
667 |
case float64: |
|
|
668 |
if resolved <= math.MaxUint64 && !out.OverflowUint(uint64(resolved)) { |
|
|
669 |
out.SetUint(uint64(resolved)) |
|
|
670 |
return true |
|
|
671 |
} |
|
|
672 |
} |
|
|
673 |
case reflect.Bool: |
|
|
674 |
switch resolved := resolved.(type) { |
|
|
675 |
case bool: |
|
|
676 |
out.SetBool(resolved) |
|
|
677 |
return true |
|
|
678 |
case string: |
|
|
679 |
// This offers some compatibility with the 1.1 spec (https://yaml.org/type/bool.html). |
|
|
680 |
// It only works if explicitly attempting to unmarshal into a typed bool value. |
|
|
681 |
switch resolved { |
|
|
682 |
case "y", "Y", "yes", "Yes", "YES", "on", "On", "ON": |
|
|
683 |
out.SetBool(true) |
|
|
684 |
return true |
|
|
685 |
case "n", "N", "no", "No", "NO", "off", "Off", "OFF": |
|
|
686 |
out.SetBool(false) |
|
|
687 |
return true |
|
|
688 |
} |
|
|
689 |
} |
|
|
690 |
case reflect.Float32, reflect.Float64: |
|
|
691 |
switch resolved := resolved.(type) { |
|
|
692 |
case int: |
|
|
693 |
out.SetFloat(float64(resolved)) |
|
|
694 |
return true |
|
|
695 |
case int64: |
|
|
696 |
out.SetFloat(float64(resolved)) |
|
|
697 |
return true |
|
|
698 |
case uint64: |
|
|
699 |
out.SetFloat(float64(resolved)) |
|
|
700 |
return true |
|
|
701 |
case float64: |
|
|
702 |
out.SetFloat(resolved) |
|
|
703 |
return true |
|
|
704 |
} |
|
|
705 |
case reflect.Struct: |
|
|
706 |
if resolvedv := reflect.ValueOf(resolved); out.Type() == resolvedv.Type() { |
|
|
707 |
out.Set(resolvedv) |
|
|
708 |
return true |
|
|
709 |
} |
|
|
710 |
case reflect.Ptr: |
|
|
711 |
panic("yaml internal error: please report the issue") |
|
|
712 |
} |
|
|
713 |
d.terror(n, tag, out) |
|
|
714 |
return false |
|
|
715 |
} |
|
|
716 |
|
|
|
717 |
func settableValueOf(i interface{}) reflect.Value { |
|
|
718 |
v := reflect.ValueOf(i) |
|
|
719 |
sv := reflect.New(v.Type()).Elem() |
|
|
720 |
sv.Set(v) |
|
|
721 |
return sv |
|
|
722 |
} |
|
|
723 |
|
|
|
724 |
func (d *decoder) sequence(n *Node, out reflect.Value) (good bool) { |
|
|
725 |
l := len(n.Content) |
|
|
726 |
|
|
|
727 |
var iface reflect.Value |
|
|
728 |
switch out.Kind() { |
|
|
729 |
case reflect.Slice: |
|
|
730 |
out.Set(reflect.MakeSlice(out.Type(), l, l)) |
|
|
731 |
case reflect.Array: |
|
|
732 |
if l != out.Len() { |
|
|
733 |
failf("invalid array: want %d elements but got %d", out.Len(), l) |
|
|
734 |
} |
|
|
735 |
case reflect.Interface: |
|
|
736 |
// No type hints. Will have to use a generic sequence. |
|
|
737 |
iface = out |
|
|
738 |
out = settableValueOf(make([]interface{}, l)) |
|
|
739 |
default: |
|
|
740 |
d.terror(n, seqTag, out) |
|
|
741 |
return false |
|
|
742 |
} |
|
|
743 |
et := out.Type().Elem() |
|
|
744 |
|
|
|
745 |
j := 0 |
|
|
746 |
for i := 0; i < l; i++ { |
|
|
747 |
e := reflect.New(et).Elem() |
|
|
748 |
if ok := d.unmarshal(n.Content[i], e); ok { |
|
|
749 |
out.Index(j).Set(e) |
|
|
750 |
j++ |
|
|
751 |
} |
|
|
752 |
} |
|
|
753 |
if out.Kind() != reflect.Array { |
|
|
754 |
out.Set(out.Slice(0, j)) |
|
|
755 |
} |
|
|
756 |
if iface.IsValid() { |
|
|
757 |
iface.Set(out) |
|
|
758 |
} |
|
|
759 |
return true |
|
|
760 |
} |
|
|
761 |
|
|
|
762 |
func (d *decoder) mapping(n *Node, out reflect.Value) (good bool) { |
|
|
763 |
l := len(n.Content) |
|
|
764 |
if d.uniqueKeys { |
|
|
765 |
nerrs := len(d.terrors) |
|
|
766 |
for i := 0; i < l; i += 2 { |
|
|
767 |
ni := n.Content[i] |
|
|
768 |
for j := i + 2; j < l; j += 2 { |
|
|
769 |
nj := n.Content[j] |
|
|
770 |
if ni.Kind == nj.Kind && ni.Value == nj.Value { |
|
|
771 |
d.terrors = append(d.terrors, fmt.Sprintf("line %d: mapping key %#v already defined at line %d", nj.Line, nj.Value, ni.Line)) |
|
|
772 |
} |
|
|
773 |
} |
|
|
774 |
} |
|
|
775 |
if len(d.terrors) > nerrs { |
|
|
776 |
return false |
|
|
777 |
} |
|
|
778 |
} |
|
|
779 |
switch out.Kind() { |
|
|
780 |
case reflect.Struct: |
|
|
781 |
return d.mappingStruct(n, out) |
|
|
782 |
case reflect.Map: |
|
|
783 |
// okay |
|
|
784 |
case reflect.Interface: |
|
|
785 |
iface := out |
|
|
786 |
if isStringMap(n) { |
|
|
787 |
out = reflect.MakeMap(d.stringMapType) |
|
|
788 |
} else { |
|
|
789 |
out = reflect.MakeMap(d.generalMapType) |
|
|
790 |
} |
|
|
791 |
iface.Set(out) |
|
|
792 |
default: |
|
|
793 |
d.terror(n, mapTag, out) |
|
|
794 |
return false |
|
|
795 |
} |
|
|
796 |
|
|
|
797 |
outt := out.Type() |
|
|
798 |
kt := outt.Key() |
|
|
799 |
et := outt.Elem() |
|
|
800 |
|
|
|
801 |
stringMapType := d.stringMapType |
|
|
802 |
generalMapType := d.generalMapType |
|
|
803 |
if outt.Elem() == ifaceType { |
|
|
804 |
if outt.Key().Kind() == reflect.String { |
|
|
805 |
d.stringMapType = outt |
|
|
806 |
} else if outt.Key() == ifaceType { |
|
|
807 |
d.generalMapType = outt |
|
|
808 |
} |
|
|
809 |
} |
|
|
810 |
|
|
|
811 |
mapIsNew := false |
|
|
812 |
if out.IsNil() { |
|
|
813 |
out.Set(reflect.MakeMap(outt)) |
|
|
814 |
mapIsNew = true |
|
|
815 |
} |
|
|
816 |
for i := 0; i < l; i += 2 { |
|
|
817 |
if isMerge(n.Content[i]) { |
|
|
818 |
d.merge(n.Content[i+1], out) |
|
|
819 |
continue |
|
|
820 |
} |
|
|
821 |
k := reflect.New(kt).Elem() |
|
|
822 |
if d.unmarshal(n.Content[i], k) { |
|
|
823 |
kkind := k.Kind() |
|
|
824 |
if kkind == reflect.Interface { |
|
|
825 |
kkind = k.Elem().Kind() |
|
|
826 |
} |
|
|
827 |
if kkind == reflect.Map || kkind == reflect.Slice { |
|
|
828 |
failf("invalid map key: %#v", k.Interface()) |
|
|
829 |
} |
|
|
830 |
e := reflect.New(et).Elem() |
|
|
831 |
if d.unmarshal(n.Content[i+1], e) || n.Content[i+1].ShortTag() == nullTag && (mapIsNew || !out.MapIndex(k).IsValid()) { |
|
|
832 |
out.SetMapIndex(k, e) |
|
|
833 |
} |
|
|
834 |
} |
|
|
835 |
} |
|
|
836 |
d.stringMapType = stringMapType |
|
|
837 |
d.generalMapType = generalMapType |
|
|
838 |
return true |
|
|
839 |
} |
|
|
840 |
|
|
|
841 |
func isStringMap(n *Node) bool { |
|
|
842 |
if n.Kind != MappingNode { |
|
|
843 |
return false |
|
|
844 |
} |
|
|
845 |
l := len(n.Content) |
|
|
846 |
for i := 0; i < l; i += 2 { |
|
|
847 |
if n.Content[i].ShortTag() != strTag { |
|
|
848 |
return false |
|
|
849 |
} |
|
|
850 |
} |
|
|
851 |
return true |
|
|
852 |
} |
|
|
853 |
|
|
|
854 |
func (d *decoder) mappingStruct(n *Node, out reflect.Value) (good bool) { |
|
|
855 |
sinfo, err := getStructInfo(out.Type()) |
|
|
856 |
if err != nil { |
|
|
857 |
panic(err) |
|
|
858 |
} |
|
|
859 |
|
|
|
860 |
var inlineMap reflect.Value |
|
|
861 |
var elemType reflect.Type |
|
|
862 |
if sinfo.InlineMap != -1 { |
|
|
863 |
inlineMap = out.Field(sinfo.InlineMap) |
|
|
864 |
inlineMap.Set(reflect.New(inlineMap.Type()).Elem()) |
|
|
865 |
elemType = inlineMap.Type().Elem() |
|
|
866 |
} |
|
|
867 |
|
|
|
868 |
for _, index := range sinfo.InlineUnmarshalers { |
|
|
869 |
field := d.fieldByIndex(n, out, index) |
|
|
870 |
d.prepare(n, field) |
|
|
871 |
} |
|
|
872 |
|
|
|
873 |
var doneFields []bool |
|
|
874 |
if d.uniqueKeys { |
|
|
875 |
doneFields = make([]bool, len(sinfo.FieldsList)) |
|
|
876 |
} |
|
|
877 |
name := settableValueOf("") |
|
|
878 |
l := len(n.Content) |
|
|
879 |
for i := 0; i < l; i += 2 { |
|
|
880 |
ni := n.Content[i] |
|
|
881 |
if isMerge(ni) { |
|
|
882 |
d.merge(n.Content[i+1], out) |
|
|
883 |
continue |
|
|
884 |
} |
|
|
885 |
if !d.unmarshal(ni, name) { |
|
|
886 |
continue |
|
|
887 |
} |
|
|
888 |
if info, ok := sinfo.FieldsMap[name.String()]; ok { |
|
|
889 |
if d.uniqueKeys { |
|
|
890 |
if doneFields[info.Id] { |
|
|
891 |
d.terrors = append(d.terrors, fmt.Sprintf("line %d: field %s already set in type %s", ni.Line, name.String(), out.Type())) |
|
|
892 |
continue |
|
|
893 |
} |
|
|
894 |
doneFields[info.Id] = true |
|
|
895 |
} |
|
|
896 |
var field reflect.Value |
|
|
897 |
if info.Inline == nil { |
|
|
898 |
field = out.Field(info.Num) |
|
|
899 |
} else { |
|
|
900 |
field = d.fieldByIndex(n, out, info.Inline) |
|
|
901 |
} |
|
|
902 |
d.unmarshal(n.Content[i+1], field) |
|
|
903 |
} else if sinfo.InlineMap != -1 { |
|
|
904 |
if inlineMap.IsNil() { |
|
|
905 |
inlineMap.Set(reflect.MakeMap(inlineMap.Type())) |
|
|
906 |
} |
|
|
907 |
value := reflect.New(elemType).Elem() |
|
|
908 |
d.unmarshal(n.Content[i+1], value) |
|
|
909 |
inlineMap.SetMapIndex(name, value) |
|
|
910 |
} else if d.knownFields { |
|
|
911 |
d.terrors = append(d.terrors, fmt.Sprintf("line %d: field %s not found in type %s", ni.Line, name.String(), out.Type())) |
|
|
912 |
} |
|
|
913 |
} |
|
|
914 |
return true |
|
|
915 |
} |
|
|
916 |
|
|
|
917 |
func failWantMap() { |
|
|
918 |
failf("map merge requires map or sequence of maps as the value") |
|
|
919 |
} |
|
|
920 |
|
|
|
921 |
func (d *decoder) merge(n *Node, out reflect.Value) { |
|
|
922 |
switch n.Kind { |
|
|
923 |
case MappingNode: |
|
|
924 |
d.unmarshal(n, out) |
|
|
925 |
case AliasNode: |
|
|
926 |
if n.Alias != nil && n.Alias.Kind != MappingNode { |
|
|
927 |
failWantMap() |
|
|
928 |
} |
|
|
929 |
d.unmarshal(n, out) |
|
|
930 |
case SequenceNode: |
|
|
931 |
// Step backwards as earlier nodes take precedence. |
|
|
932 |
for i := len(n.Content) - 1; i >= 0; i-- { |
|
|
933 |
ni := n.Content[i] |
|
|
934 |
if ni.Kind == AliasNode { |
|
|
935 |
if ni.Alias != nil && ni.Alias.Kind != MappingNode { |
|
|
936 |
failWantMap() |
|
|
937 |
} |
|
|
938 |
} else if ni.Kind != MappingNode { |
|
|
939 |
failWantMap() |
|
|
940 |
} |
|
|
941 |
d.unmarshal(ni, out) |
|
|
942 |
} |
|
|
943 |
default: |
|
|
944 |
failWantMap() |
|
|
945 |
} |
|
|
946 |
} |
|
|
947 |
|
|
|
948 |
func isMerge(n *Node) bool { |
|
|
949 |
return n.Kind == ScalarNode && n.Value == "<<" && (n.Tag == "" || n.Tag == "!" || shortTag(n.Tag) == mergeTag) |
|
|
950 |
} |