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2021 lines
54 KiB
Go
2021 lines
54 KiB
Go
//
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// Copyright (c) 2011-2019 Canonical Ltd
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// Copyright (c) 2006-2010 Kirill Simonov
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package yaml
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import (
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"bytes"
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"fmt"
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)
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// Flush the buffer if needed.
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func flush(emitter *yaml_emitter_t) bool {
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if emitter.buffer_pos+5 >= len(emitter.buffer) {
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return yaml_emitter_flush(emitter)
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}
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return true
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}
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// Put a character to the output buffer.
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func put(emitter *yaml_emitter_t, value byte) bool {
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if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) {
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return false
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}
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emitter.buffer[emitter.buffer_pos] = value
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emitter.buffer_pos++
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emitter.column++
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return true
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}
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// Put a line break to the output buffer.
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func put_break(emitter *yaml_emitter_t) bool {
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if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) {
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return false
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}
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switch emitter.line_break {
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case yaml_CR_BREAK:
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emitter.buffer[emitter.buffer_pos] = '\r'
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emitter.buffer_pos += 1
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case yaml_LN_BREAK:
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emitter.buffer[emitter.buffer_pos] = '\n'
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emitter.buffer_pos += 1
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case yaml_CRLN_BREAK:
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emitter.buffer[emitter.buffer_pos+0] = '\r'
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emitter.buffer[emitter.buffer_pos+1] = '\n'
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emitter.buffer_pos += 2
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default:
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panic("unknown line break setting")
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}
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if emitter.column == 0 {
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emitter.space_above = true
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}
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emitter.column = 0
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emitter.line++
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// [Go] Do this here and below and drop from everywhere else (see commented lines).
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emitter.indention = true
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return true
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}
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// Copy a character from a string into buffer.
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func write(emitter *yaml_emitter_t, s []byte, i *int) bool {
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if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) {
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return false
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}
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p := emitter.buffer_pos
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w := width(s[*i])
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switch w {
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case 4:
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emitter.buffer[p+3] = s[*i+3]
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fallthrough
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case 3:
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emitter.buffer[p+2] = s[*i+2]
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fallthrough
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case 2:
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emitter.buffer[p+1] = s[*i+1]
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fallthrough
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case 1:
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emitter.buffer[p+0] = s[*i+0]
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default:
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panic("unknown character width")
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}
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emitter.column++
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emitter.buffer_pos += w
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*i += w
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return true
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}
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// Write a whole string into buffer.
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func write_all(emitter *yaml_emitter_t, s []byte) bool {
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for i := 0; i < len(s); {
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if !write(emitter, s, &i) {
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return false
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}
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}
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return true
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}
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// Copy a line break character from a string into buffer.
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func write_break(emitter *yaml_emitter_t, s []byte, i *int) bool {
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if s[*i] == '\n' {
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if !put_break(emitter) {
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return false
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}
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*i++
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} else {
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if !write(emitter, s, i) {
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return false
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}
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if emitter.column == 0 {
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emitter.space_above = true
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}
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emitter.column = 0
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emitter.line++
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// [Go] Do this here and above and drop from everywhere else (see commented lines).
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emitter.indention = true
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}
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return true
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}
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// Set an emitter error and return false.
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func yaml_emitter_set_emitter_error(emitter *yaml_emitter_t, problem string) bool {
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emitter.error = yaml_EMITTER_ERROR
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emitter.problem = problem
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return false
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}
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// Emit an event.
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func yaml_emitter_emit(emitter *yaml_emitter_t, event *yaml_event_t) bool {
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emitter.events = append(emitter.events, *event)
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for !yaml_emitter_need_more_events(emitter) {
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event := &emitter.events[emitter.events_head]
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if !yaml_emitter_analyze_event(emitter, event) {
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return false
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}
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if !yaml_emitter_state_machine(emitter, event) {
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return false
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}
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yaml_event_delete(event)
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emitter.events_head++
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}
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return true
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}
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// Check if we need to accumulate more events before emitting.
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//
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// We accumulate extra
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// - 1 event for DOCUMENT-START
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// - 2 events for SEQUENCE-START
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// - 3 events for MAPPING-START
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//
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func yaml_emitter_need_more_events(emitter *yaml_emitter_t) bool {
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if emitter.events_head == len(emitter.events) {
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return true
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}
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var accumulate int
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switch emitter.events[emitter.events_head].typ {
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case yaml_DOCUMENT_START_EVENT:
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accumulate = 1
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break
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case yaml_SEQUENCE_START_EVENT:
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accumulate = 2
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break
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case yaml_MAPPING_START_EVENT:
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accumulate = 3
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break
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default:
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return false
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}
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if len(emitter.events)-emitter.events_head > accumulate {
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return false
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}
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var level int
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for i := emitter.events_head; i < len(emitter.events); i++ {
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switch emitter.events[i].typ {
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case yaml_STREAM_START_EVENT, yaml_DOCUMENT_START_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT:
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level++
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case yaml_STREAM_END_EVENT, yaml_DOCUMENT_END_EVENT, yaml_SEQUENCE_END_EVENT, yaml_MAPPING_END_EVENT:
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level--
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}
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if level == 0 {
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return false
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}
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}
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return true
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}
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// Append a directive to the directives stack.
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func yaml_emitter_append_tag_directive(emitter *yaml_emitter_t, value *yaml_tag_directive_t, allow_duplicates bool) bool {
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for i := 0; i < len(emitter.tag_directives); i++ {
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if bytes.Equal(value.handle, emitter.tag_directives[i].handle) {
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if allow_duplicates {
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return true
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}
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return yaml_emitter_set_emitter_error(emitter, "duplicate %TAG directive")
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}
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}
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// [Go] Do we actually need to copy this given garbage collection
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// and the lack of deallocating destructors?
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tag_copy := yaml_tag_directive_t{
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handle: make([]byte, len(value.handle)),
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prefix: make([]byte, len(value.prefix)),
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}
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copy(tag_copy.handle, value.handle)
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copy(tag_copy.prefix, value.prefix)
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emitter.tag_directives = append(emitter.tag_directives, tag_copy)
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return true
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}
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// Increase the indentation level.
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func yaml_emitter_increase_indent(emitter *yaml_emitter_t, flow, indentless bool) bool {
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emitter.indents = append(emitter.indents, emitter.indent)
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if emitter.indent < 0 {
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if flow {
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emitter.indent = emitter.best_indent
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} else {
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emitter.indent = 0
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}
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} else if !indentless {
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// [Go] This was changed so that indentations are more regular.
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if emitter.states[len(emitter.states)-1] == yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE {
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// The first indent inside a sequence will just skip the "- " indicator.
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emitter.indent += 2
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} else {
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// Everything else aligns to the chosen indentation.
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emitter.indent = emitter.best_indent*((emitter.indent+emitter.best_indent)/emitter.best_indent)
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}
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}
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return true
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}
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// State dispatcher.
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func yaml_emitter_state_machine(emitter *yaml_emitter_t, event *yaml_event_t) bool {
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switch emitter.state {
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default:
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case yaml_EMIT_STREAM_START_STATE:
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return yaml_emitter_emit_stream_start(emitter, event)
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case yaml_EMIT_FIRST_DOCUMENT_START_STATE:
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return yaml_emitter_emit_document_start(emitter, event, true)
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case yaml_EMIT_DOCUMENT_START_STATE:
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return yaml_emitter_emit_document_start(emitter, event, false)
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case yaml_EMIT_DOCUMENT_CONTENT_STATE:
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return yaml_emitter_emit_document_content(emitter, event)
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case yaml_EMIT_DOCUMENT_END_STATE:
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return yaml_emitter_emit_document_end(emitter, event)
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case yaml_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE:
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return yaml_emitter_emit_flow_sequence_item(emitter, event, true, false)
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case yaml_EMIT_FLOW_SEQUENCE_TRAIL_ITEM_STATE:
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return yaml_emitter_emit_flow_sequence_item(emitter, event, false, true)
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case yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE:
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return yaml_emitter_emit_flow_sequence_item(emitter, event, false, false)
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case yaml_EMIT_FLOW_MAPPING_FIRST_KEY_STATE:
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return yaml_emitter_emit_flow_mapping_key(emitter, event, true, false)
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case yaml_EMIT_FLOW_MAPPING_TRAIL_KEY_STATE:
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return yaml_emitter_emit_flow_mapping_key(emitter, event, false, true)
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case yaml_EMIT_FLOW_MAPPING_KEY_STATE:
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return yaml_emitter_emit_flow_mapping_key(emitter, event, false, false)
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case yaml_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE:
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return yaml_emitter_emit_flow_mapping_value(emitter, event, true)
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case yaml_EMIT_FLOW_MAPPING_VALUE_STATE:
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return yaml_emitter_emit_flow_mapping_value(emitter, event, false)
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case yaml_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE:
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return yaml_emitter_emit_block_sequence_item(emitter, event, true)
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case yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE:
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return yaml_emitter_emit_block_sequence_item(emitter, event, false)
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case yaml_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE:
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return yaml_emitter_emit_block_mapping_key(emitter, event, true)
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case yaml_EMIT_BLOCK_MAPPING_KEY_STATE:
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return yaml_emitter_emit_block_mapping_key(emitter, event, false)
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case yaml_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE:
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return yaml_emitter_emit_block_mapping_value(emitter, event, true)
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case yaml_EMIT_BLOCK_MAPPING_VALUE_STATE:
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return yaml_emitter_emit_block_mapping_value(emitter, event, false)
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case yaml_EMIT_END_STATE:
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return yaml_emitter_set_emitter_error(emitter, "expected nothing after STREAM-END")
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}
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panic("invalid emitter state")
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}
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// Expect STREAM-START.
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func yaml_emitter_emit_stream_start(emitter *yaml_emitter_t, event *yaml_event_t) bool {
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if event.typ != yaml_STREAM_START_EVENT {
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return yaml_emitter_set_emitter_error(emitter, "expected STREAM-START")
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}
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if emitter.encoding == yaml_ANY_ENCODING {
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emitter.encoding = event.encoding
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if emitter.encoding == yaml_ANY_ENCODING {
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emitter.encoding = yaml_UTF8_ENCODING
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}
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}
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if emitter.best_indent < 2 || emitter.best_indent > 9 {
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emitter.best_indent = 2
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}
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if emitter.best_width >= 0 && emitter.best_width <= emitter.best_indent*2 {
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emitter.best_width = 80
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}
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if emitter.best_width < 0 {
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emitter.best_width = 1<<31 - 1
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}
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if emitter.line_break == yaml_ANY_BREAK {
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emitter.line_break = yaml_LN_BREAK
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}
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emitter.indent = -1
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emitter.line = 0
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emitter.column = 0
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emitter.whitespace = true
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emitter.indention = true
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emitter.space_above = true
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emitter.foot_indent = -1
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if emitter.encoding != yaml_UTF8_ENCODING {
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if !yaml_emitter_write_bom(emitter) {
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return false
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}
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}
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emitter.state = yaml_EMIT_FIRST_DOCUMENT_START_STATE
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return true
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}
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// Expect DOCUMENT-START or STREAM-END.
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func yaml_emitter_emit_document_start(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool {
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if event.typ == yaml_DOCUMENT_START_EVENT {
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if event.version_directive != nil {
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if !yaml_emitter_analyze_version_directive(emitter, event.version_directive) {
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return false
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}
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}
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for i := 0; i < len(event.tag_directives); i++ {
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tag_directive := &event.tag_directives[i]
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if !yaml_emitter_analyze_tag_directive(emitter, tag_directive) {
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return false
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}
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if !yaml_emitter_append_tag_directive(emitter, tag_directive, false) {
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return false
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}
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}
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for i := 0; i < len(default_tag_directives); i++ {
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tag_directive := &default_tag_directives[i]
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if !yaml_emitter_append_tag_directive(emitter, tag_directive, true) {
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return false
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}
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}
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implicit := event.implicit
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if !first || emitter.canonical {
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implicit = false
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}
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if emitter.open_ended && (event.version_directive != nil || len(event.tag_directives) > 0) {
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if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) {
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return false
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}
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if !yaml_emitter_write_indent(emitter) {
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return false
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}
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}
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if event.version_directive != nil {
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implicit = false
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if !yaml_emitter_write_indicator(emitter, []byte("%YAML"), true, false, false) {
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return false
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}
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if !yaml_emitter_write_indicator(emitter, []byte("1.1"), true, false, false) {
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return false
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}
|
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if !yaml_emitter_write_indent(emitter) {
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return false
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}
|
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}
|
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|
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if len(event.tag_directives) > 0 {
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implicit = false
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for i := 0; i < len(event.tag_directives); i++ {
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tag_directive := &event.tag_directives[i]
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if !yaml_emitter_write_indicator(emitter, []byte("%TAG"), true, false, false) {
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return false
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}
|
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if !yaml_emitter_write_tag_handle(emitter, tag_directive.handle) {
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return false
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}
|
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if !yaml_emitter_write_tag_content(emitter, tag_directive.prefix, true) {
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return false
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}
|
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if !yaml_emitter_write_indent(emitter) {
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return false
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}
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}
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}
|
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|
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if yaml_emitter_check_empty_document(emitter) {
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implicit = false
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}
|
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if !implicit {
|
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if !yaml_emitter_write_indent(emitter) {
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return false
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}
|
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if !yaml_emitter_write_indicator(emitter, []byte("---"), true, false, false) {
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return false
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}
|
|
if emitter.canonical || true {
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if !yaml_emitter_write_indent(emitter) {
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return false
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}
|
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}
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|
}
|
|
|
|
if len(emitter.head_comment) > 0 {
|
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if !yaml_emitter_process_head_comment(emitter) {
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return false
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|
}
|
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if !put_break(emitter) {
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return false
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}
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}
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|
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emitter.state = yaml_EMIT_DOCUMENT_CONTENT_STATE
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return true
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|
}
|
|
|
|
if event.typ == yaml_STREAM_END_EVENT {
|
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if emitter.open_ended {
|
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if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) {
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return false
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}
|
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if !yaml_emitter_write_indent(emitter) {
|
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return false
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}
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}
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if !yaml_emitter_flush(emitter) {
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return false
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|
}
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emitter.state = yaml_EMIT_END_STATE
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return true
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|
}
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|
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return yaml_emitter_set_emitter_error(emitter, "expected DOCUMENT-START or STREAM-END")
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}
|
|
|
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// Expect the root node.
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func yaml_emitter_emit_document_content(emitter *yaml_emitter_t, event *yaml_event_t) bool {
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emitter.states = append(emitter.states, yaml_EMIT_DOCUMENT_END_STATE)
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|
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if !yaml_emitter_process_head_comment(emitter) {
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return false
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}
|
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if !yaml_emitter_emit_node(emitter, event, true, false, false, false) {
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return false
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}
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if !yaml_emitter_process_line_comment(emitter) {
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return false
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}
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if !yaml_emitter_process_foot_comment(emitter) {
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return false
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}
|
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return true
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}
|
|
|
|
// Expect DOCUMENT-END.
|
|
func yaml_emitter_emit_document_end(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
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if event.typ != yaml_DOCUMENT_END_EVENT {
|
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return yaml_emitter_set_emitter_error(emitter, "expected DOCUMENT-END")
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}
|
|
// [Go] Force document foot separation.
|
|
emitter.foot_indent = 0
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|
if !yaml_emitter_process_foot_comment(emitter) {
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return false
|
|
}
|
|
emitter.foot_indent = -1
|
|
if !yaml_emitter_write_indent(emitter) {
|
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return false
|
|
}
|
|
if !event.implicit {
|
|
// [Go] Allocate the slice elsewhere.
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|
if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) {
|
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return false
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|
}
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_flush(emitter) {
|
|
return false
|
|
}
|
|
emitter.state = yaml_EMIT_DOCUMENT_START_STATE
|
|
emitter.tag_directives = emitter.tag_directives[:0]
|
|
return true
|
|
}
|
|
|
|
// Expect a flow item node.
|
|
func yaml_emitter_emit_flow_sequence_item(emitter *yaml_emitter_t, event *yaml_event_t, first, trail bool) bool {
|
|
if first {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'['}, true, true, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_increase_indent(emitter, true, false) {
|
|
return false
|
|
}
|
|
emitter.flow_level++
|
|
}
|
|
|
|
if event.typ == yaml_SEQUENCE_END_EVENT {
|
|
if emitter.canonical && !first && !trail {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
emitter.flow_level--
|
|
emitter.indent = emitter.indents[len(emitter.indents)-1]
|
|
emitter.indents = emitter.indents[:len(emitter.indents)-1]
|
|
if emitter.column == 0 || emitter.canonical && !first {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{']'}, false, false, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_foot_comment(emitter) {
|
|
return false
|
|
}
|
|
emitter.state = emitter.states[len(emitter.states)-1]
|
|
emitter.states = emitter.states[:len(emitter.states)-1]
|
|
|
|
return true
|
|
}
|
|
|
|
if !first && !trail {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if !yaml_emitter_process_head_comment(emitter) {
|
|
return false
|
|
}
|
|
if emitter.column == 0 {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if emitter.canonical || emitter.column > emitter.best_width {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if len(emitter.line_comment)+len(emitter.foot_comment)+len(emitter.tail_comment) > 0 {
|
|
emitter.states = append(emitter.states, yaml_EMIT_FLOW_SEQUENCE_TRAIL_ITEM_STATE)
|
|
} else {
|
|
emitter.states = append(emitter.states, yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE)
|
|
}
|
|
if !yaml_emitter_emit_node(emitter, event, false, true, false, false) {
|
|
return false
|
|
}
|
|
if len(emitter.line_comment)+len(emitter.foot_comment)+len(emitter.tail_comment) > 0 {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_foot_comment(emitter) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Expect a flow key node.
|
|
func yaml_emitter_emit_flow_mapping_key(emitter *yaml_emitter_t, event *yaml_event_t, first, trail bool) bool {
|
|
if first {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'{'}, true, true, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_increase_indent(emitter, true, false) {
|
|
return false
|
|
}
|
|
emitter.flow_level++
|
|
}
|
|
|
|
if event.typ == yaml_MAPPING_END_EVENT {
|
|
if (emitter.canonical || len(emitter.head_comment)+len(emitter.foot_comment)+len(emitter.tail_comment) > 0) && !first && !trail {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_process_head_comment(emitter) {
|
|
return false
|
|
}
|
|
emitter.flow_level--
|
|
emitter.indent = emitter.indents[len(emitter.indents)-1]
|
|
emitter.indents = emitter.indents[:len(emitter.indents)-1]
|
|
if emitter.canonical && !first {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'}'}, false, false, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_foot_comment(emitter) {
|
|
return false
|
|
}
|
|
emitter.state = emitter.states[len(emitter.states)-1]
|
|
emitter.states = emitter.states[:len(emitter.states)-1]
|
|
return true
|
|
}
|
|
|
|
if !first && !trail {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if !yaml_emitter_process_head_comment(emitter) {
|
|
return false
|
|
}
|
|
|
|
if emitter.column == 0 {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if emitter.canonical || emitter.column > emitter.best_width {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if !emitter.canonical && yaml_emitter_check_simple_key(emitter) {
|
|
emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE)
|
|
return yaml_emitter_emit_node(emitter, event, false, false, true, true)
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'?'}, true, false, false) {
|
|
return false
|
|
}
|
|
emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_VALUE_STATE)
|
|
return yaml_emitter_emit_node(emitter, event, false, false, true, false)
|
|
}
|
|
|
|
// Expect a flow value node.
|
|
func yaml_emitter_emit_flow_mapping_value(emitter *yaml_emitter_t, event *yaml_event_t, simple bool) bool {
|
|
if simple {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{':'}, false, false, false) {
|
|
return false
|
|
}
|
|
} else {
|
|
if emitter.canonical || emitter.column > emitter.best_width {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{':'}, true, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
if len(emitter.line_comment)+len(emitter.foot_comment)+len(emitter.tail_comment) > 0 {
|
|
emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_TRAIL_KEY_STATE)
|
|
} else {
|
|
emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_KEY_STATE)
|
|
}
|
|
if !yaml_emitter_emit_node(emitter, event, false, false, true, false) {
|
|
return false
|
|
}
|
|
if len(emitter.line_comment)+len(emitter.foot_comment)+len(emitter.tail_comment) > 0 {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_foot_comment(emitter) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Expect a block item node.
|
|
func yaml_emitter_emit_block_sequence_item(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool {
|
|
if first {
|
|
if !yaml_emitter_increase_indent(emitter, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
if event.typ == yaml_SEQUENCE_END_EVENT {
|
|
emitter.indent = emitter.indents[len(emitter.indents)-1]
|
|
emitter.indents = emitter.indents[:len(emitter.indents)-1]
|
|
emitter.state = emitter.states[len(emitter.states)-1]
|
|
emitter.states = emitter.states[:len(emitter.states)-1]
|
|
return true
|
|
}
|
|
if !yaml_emitter_process_head_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'-'}, true, false, true) {
|
|
return false
|
|
}
|
|
emitter.states = append(emitter.states, yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE)
|
|
if !yaml_emitter_emit_node(emitter, event, false, true, false, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_foot_comment(emitter) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Expect a block key node.
|
|
func yaml_emitter_emit_block_mapping_key(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool {
|
|
if first {
|
|
if !yaml_emitter_increase_indent(emitter, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_process_head_comment(emitter) {
|
|
return false
|
|
}
|
|
if event.typ == yaml_MAPPING_END_EVENT {
|
|
emitter.indent = emitter.indents[len(emitter.indents)-1]
|
|
emitter.indents = emitter.indents[:len(emitter.indents)-1]
|
|
emitter.state = emitter.states[len(emitter.states)-1]
|
|
emitter.states = emitter.states[:len(emitter.states)-1]
|
|
return true
|
|
}
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if len(emitter.line_comment) > 0 {
|
|
// [Go] A line comment was provided for the key. That's unusual as the
|
|
// scanner associates line comments with the value. Either way,
|
|
// save the line comment and render it appropriately later.
|
|
emitter.key_line_comment = emitter.line_comment
|
|
emitter.line_comment = nil
|
|
}
|
|
if yaml_emitter_check_simple_key(emitter) {
|
|
emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE)
|
|
return yaml_emitter_emit_node(emitter, event, false, false, true, true)
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'?'}, true, false, true) {
|
|
return false
|
|
}
|
|
emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_VALUE_STATE)
|
|
return yaml_emitter_emit_node(emitter, event, false, false, true, false)
|
|
}
|
|
|
|
// Expect a block value node.
|
|
func yaml_emitter_emit_block_mapping_value(emitter *yaml_emitter_t, event *yaml_event_t, simple bool) bool {
|
|
if simple {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{':'}, false, false, false) {
|
|
return false
|
|
}
|
|
} else {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{':'}, true, false, true) {
|
|
return false
|
|
}
|
|
}
|
|
if len(emitter.key_line_comment) > 0 {
|
|
// [Go] Line comments are generally associated with the value, but when there's
|
|
// no value on the same line as a mapping key they end up attached to the
|
|
// key itself.
|
|
if event.typ == yaml_SCALAR_EVENT {
|
|
if len(emitter.line_comment) == 0 {
|
|
// A scalar is coming and it has no line comments by itself yet,
|
|
// so just let it handle the line comment as usual. If it has a
|
|
// line comment, we can't have both so the one from the key is lost.
|
|
emitter.line_comment = emitter.key_line_comment
|
|
emitter.key_line_comment = nil
|
|
}
|
|
} else if event.sequence_style() != yaml_FLOW_SEQUENCE_STYLE && (event.typ == yaml_MAPPING_START_EVENT || event.typ == yaml_SEQUENCE_START_EVENT) {
|
|
// An indented block follows, so write the comment right now.
|
|
emitter.line_comment, emitter.key_line_comment = emitter.key_line_comment, emitter.line_comment
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
emitter.line_comment, emitter.key_line_comment = emitter.key_line_comment, emitter.line_comment
|
|
}
|
|
}
|
|
emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_KEY_STATE)
|
|
if !yaml_emitter_emit_node(emitter, event, false, false, true, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_foot_comment(emitter) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_silent_nil_event(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
return event.typ == yaml_SCALAR_EVENT && event.implicit && !emitter.canonical && len(emitter.scalar_data.value) == 0
|
|
}
|
|
|
|
// Expect a node.
|
|
func yaml_emitter_emit_node(emitter *yaml_emitter_t, event *yaml_event_t,
|
|
root bool, sequence bool, mapping bool, simple_key bool) bool {
|
|
|
|
emitter.root_context = root
|
|
emitter.sequence_context = sequence
|
|
emitter.mapping_context = mapping
|
|
emitter.simple_key_context = simple_key
|
|
|
|
switch event.typ {
|
|
case yaml_ALIAS_EVENT:
|
|
return yaml_emitter_emit_alias(emitter, event)
|
|
case yaml_SCALAR_EVENT:
|
|
return yaml_emitter_emit_scalar(emitter, event)
|
|
case yaml_SEQUENCE_START_EVENT:
|
|
return yaml_emitter_emit_sequence_start(emitter, event)
|
|
case yaml_MAPPING_START_EVENT:
|
|
return yaml_emitter_emit_mapping_start(emitter, event)
|
|
default:
|
|
return yaml_emitter_set_emitter_error(emitter,
|
|
fmt.Sprintf("expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS, but got %v", event.typ))
|
|
}
|
|
}
|
|
|
|
// Expect ALIAS.
|
|
func yaml_emitter_emit_alias(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
if !yaml_emitter_process_anchor(emitter) {
|
|
return false
|
|
}
|
|
emitter.state = emitter.states[len(emitter.states)-1]
|
|
emitter.states = emitter.states[:len(emitter.states)-1]
|
|
return true
|
|
}
|
|
|
|
// Expect SCALAR.
|
|
func yaml_emitter_emit_scalar(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
if !yaml_emitter_select_scalar_style(emitter, event) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_anchor(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_tag(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_increase_indent(emitter, true, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_scalar(emitter) {
|
|
return false
|
|
}
|
|
emitter.indent = emitter.indents[len(emitter.indents)-1]
|
|
emitter.indents = emitter.indents[:len(emitter.indents)-1]
|
|
emitter.state = emitter.states[len(emitter.states)-1]
|
|
emitter.states = emitter.states[:len(emitter.states)-1]
|
|
return true
|
|
}
|
|
|
|
// Expect SEQUENCE-START.
|
|
func yaml_emitter_emit_sequence_start(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
if !yaml_emitter_process_anchor(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_tag(emitter) {
|
|
return false
|
|
}
|
|
if emitter.flow_level > 0 || emitter.canonical || event.sequence_style() == yaml_FLOW_SEQUENCE_STYLE ||
|
|
yaml_emitter_check_empty_sequence(emitter) {
|
|
emitter.state = yaml_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE
|
|
} else {
|
|
emitter.state = yaml_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Expect MAPPING-START.
|
|
func yaml_emitter_emit_mapping_start(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
if !yaml_emitter_process_anchor(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_tag(emitter) {
|
|
return false
|
|
}
|
|
if emitter.flow_level > 0 || emitter.canonical || event.mapping_style() == yaml_FLOW_MAPPING_STYLE ||
|
|
yaml_emitter_check_empty_mapping(emitter) {
|
|
emitter.state = yaml_EMIT_FLOW_MAPPING_FIRST_KEY_STATE
|
|
} else {
|
|
emitter.state = yaml_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Check if the document content is an empty scalar.
|
|
func yaml_emitter_check_empty_document(emitter *yaml_emitter_t) bool {
|
|
return false // [Go] Huh?
|
|
}
|
|
|
|
// Check if the next events represent an empty sequence.
|
|
func yaml_emitter_check_empty_sequence(emitter *yaml_emitter_t) bool {
|
|
if len(emitter.events)-emitter.events_head < 2 {
|
|
return false
|
|
}
|
|
return emitter.events[emitter.events_head].typ == yaml_SEQUENCE_START_EVENT &&
|
|
emitter.events[emitter.events_head+1].typ == yaml_SEQUENCE_END_EVENT
|
|
}
|
|
|
|
// Check if the next events represent an empty mapping.
|
|
func yaml_emitter_check_empty_mapping(emitter *yaml_emitter_t) bool {
|
|
if len(emitter.events)-emitter.events_head < 2 {
|
|
return false
|
|
}
|
|
return emitter.events[emitter.events_head].typ == yaml_MAPPING_START_EVENT &&
|
|
emitter.events[emitter.events_head+1].typ == yaml_MAPPING_END_EVENT
|
|
}
|
|
|
|
// Check if the next node can be expressed as a simple key.
|
|
func yaml_emitter_check_simple_key(emitter *yaml_emitter_t) bool {
|
|
length := 0
|
|
switch emitter.events[emitter.events_head].typ {
|
|
case yaml_ALIAS_EVENT:
|
|
length += len(emitter.anchor_data.anchor)
|
|
case yaml_SCALAR_EVENT:
|
|
if emitter.scalar_data.multiline {
|
|
return false
|
|
}
|
|
length += len(emitter.anchor_data.anchor) +
|
|
len(emitter.tag_data.handle) +
|
|
len(emitter.tag_data.suffix) +
|
|
len(emitter.scalar_data.value)
|
|
case yaml_SEQUENCE_START_EVENT:
|
|
if !yaml_emitter_check_empty_sequence(emitter) {
|
|
return false
|
|
}
|
|
length += len(emitter.anchor_data.anchor) +
|
|
len(emitter.tag_data.handle) +
|
|
len(emitter.tag_data.suffix)
|
|
case yaml_MAPPING_START_EVENT:
|
|
if !yaml_emitter_check_empty_mapping(emitter) {
|
|
return false
|
|
}
|
|
length += len(emitter.anchor_data.anchor) +
|
|
len(emitter.tag_data.handle) +
|
|
len(emitter.tag_data.suffix)
|
|
default:
|
|
return false
|
|
}
|
|
return length <= 128
|
|
}
|
|
|
|
// Determine an acceptable scalar style.
|
|
func yaml_emitter_select_scalar_style(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
|
|
no_tag := len(emitter.tag_data.handle) == 0 && len(emitter.tag_data.suffix) == 0
|
|
if no_tag && !event.implicit && !event.quoted_implicit {
|
|
return yaml_emitter_set_emitter_error(emitter, "neither tag nor implicit flags are specified")
|
|
}
|
|
|
|
style := event.scalar_style()
|
|
if style == yaml_ANY_SCALAR_STYLE {
|
|
style = yaml_PLAIN_SCALAR_STYLE
|
|
}
|
|
if emitter.canonical {
|
|
style = yaml_DOUBLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
if emitter.simple_key_context && emitter.scalar_data.multiline {
|
|
style = yaml_DOUBLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
|
|
if style == yaml_PLAIN_SCALAR_STYLE {
|
|
if emitter.flow_level > 0 && !emitter.scalar_data.flow_plain_allowed ||
|
|
emitter.flow_level == 0 && !emitter.scalar_data.block_plain_allowed {
|
|
style = yaml_SINGLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
if len(emitter.scalar_data.value) == 0 && (emitter.flow_level > 0 || emitter.simple_key_context) {
|
|
style = yaml_SINGLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
if no_tag && !event.implicit {
|
|
style = yaml_SINGLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
}
|
|
if style == yaml_SINGLE_QUOTED_SCALAR_STYLE {
|
|
if !emitter.scalar_data.single_quoted_allowed {
|
|
style = yaml_DOUBLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
}
|
|
if style == yaml_LITERAL_SCALAR_STYLE || style == yaml_FOLDED_SCALAR_STYLE {
|
|
if !emitter.scalar_data.block_allowed || emitter.flow_level > 0 || emitter.simple_key_context {
|
|
style = yaml_DOUBLE_QUOTED_SCALAR_STYLE
|
|
}
|
|
}
|
|
|
|
if no_tag && !event.quoted_implicit && style != yaml_PLAIN_SCALAR_STYLE {
|
|
emitter.tag_data.handle = []byte{'!'}
|
|
}
|
|
emitter.scalar_data.style = style
|
|
return true
|
|
}
|
|
|
|
// Write an anchor.
|
|
func yaml_emitter_process_anchor(emitter *yaml_emitter_t) bool {
|
|
if emitter.anchor_data.anchor == nil {
|
|
return true
|
|
}
|
|
c := []byte{'&'}
|
|
if emitter.anchor_data.alias {
|
|
c[0] = '*'
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, c, true, false, false) {
|
|
return false
|
|
}
|
|
return yaml_emitter_write_anchor(emitter, emitter.anchor_data.anchor)
|
|
}
|
|
|
|
// Write a tag.
|
|
func yaml_emitter_process_tag(emitter *yaml_emitter_t) bool {
|
|
if len(emitter.tag_data.handle) == 0 && len(emitter.tag_data.suffix) == 0 {
|
|
return true
|
|
}
|
|
if len(emitter.tag_data.handle) > 0 {
|
|
if !yaml_emitter_write_tag_handle(emitter, emitter.tag_data.handle) {
|
|
return false
|
|
}
|
|
if len(emitter.tag_data.suffix) > 0 {
|
|
if !yaml_emitter_write_tag_content(emitter, emitter.tag_data.suffix, false) {
|
|
return false
|
|
}
|
|
}
|
|
} else {
|
|
// [Go] Allocate these slices elsewhere.
|
|
if !yaml_emitter_write_indicator(emitter, []byte("!<"), true, false, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_tag_content(emitter, emitter.tag_data.suffix, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'>'}, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Write a scalar.
|
|
func yaml_emitter_process_scalar(emitter *yaml_emitter_t) bool {
|
|
switch emitter.scalar_data.style {
|
|
case yaml_PLAIN_SCALAR_STYLE:
|
|
return yaml_emitter_write_plain_scalar(emitter, emitter.scalar_data.value, !emitter.simple_key_context)
|
|
|
|
case yaml_SINGLE_QUOTED_SCALAR_STYLE:
|
|
return yaml_emitter_write_single_quoted_scalar(emitter, emitter.scalar_data.value, !emitter.simple_key_context)
|
|
|
|
case yaml_DOUBLE_QUOTED_SCALAR_STYLE:
|
|
return yaml_emitter_write_double_quoted_scalar(emitter, emitter.scalar_data.value, !emitter.simple_key_context)
|
|
|
|
case yaml_LITERAL_SCALAR_STYLE:
|
|
return yaml_emitter_write_literal_scalar(emitter, emitter.scalar_data.value)
|
|
|
|
case yaml_FOLDED_SCALAR_STYLE:
|
|
return yaml_emitter_write_folded_scalar(emitter, emitter.scalar_data.value)
|
|
}
|
|
panic("unknown scalar style")
|
|
}
|
|
|
|
// Write a head comment.
|
|
func yaml_emitter_process_head_comment(emitter *yaml_emitter_t) bool {
|
|
if len(emitter.tail_comment) > 0 {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_comment(emitter, emitter.tail_comment) {
|
|
return false
|
|
}
|
|
emitter.tail_comment = emitter.tail_comment[:0]
|
|
emitter.foot_indent = emitter.indent
|
|
if emitter.foot_indent < 0 {
|
|
emitter.foot_indent = 0
|
|
}
|
|
}
|
|
|
|
if len(emitter.head_comment) == 0 {
|
|
return true
|
|
}
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_comment(emitter, emitter.head_comment) {
|
|
return false
|
|
}
|
|
emitter.head_comment = emitter.head_comment[:0]
|
|
return true
|
|
}
|
|
|
|
// Write an line comment.
|
|
func yaml_emitter_process_line_comment(emitter *yaml_emitter_t) bool {
|
|
if len(emitter.line_comment) == 0 {
|
|
return true
|
|
}
|
|
if !emitter.whitespace {
|
|
if !put(emitter, ' ') {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_write_comment(emitter, emitter.line_comment) {
|
|
return false
|
|
}
|
|
emitter.line_comment = emitter.line_comment[:0]
|
|
return true
|
|
}
|
|
|
|
// Write a foot comment.
|
|
func yaml_emitter_process_foot_comment(emitter *yaml_emitter_t) bool {
|
|
if len(emitter.foot_comment) == 0 {
|
|
return true
|
|
}
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_comment(emitter, emitter.foot_comment) {
|
|
return false
|
|
}
|
|
emitter.foot_comment = emitter.foot_comment[:0]
|
|
emitter.foot_indent = emitter.indent
|
|
if emitter.foot_indent < 0 {
|
|
emitter.foot_indent = 0
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Check if a %YAML directive is valid.
|
|
func yaml_emitter_analyze_version_directive(emitter *yaml_emitter_t, version_directive *yaml_version_directive_t) bool {
|
|
if version_directive.major != 1 || version_directive.minor != 1 {
|
|
return yaml_emitter_set_emitter_error(emitter, "incompatible %YAML directive")
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Check if a %TAG directive is valid.
|
|
func yaml_emitter_analyze_tag_directive(emitter *yaml_emitter_t, tag_directive *yaml_tag_directive_t) bool {
|
|
handle := tag_directive.handle
|
|
prefix := tag_directive.prefix
|
|
if len(handle) == 0 {
|
|
return yaml_emitter_set_emitter_error(emitter, "tag handle must not be empty")
|
|
}
|
|
if handle[0] != '!' {
|
|
return yaml_emitter_set_emitter_error(emitter, "tag handle must start with '!'")
|
|
}
|
|
if handle[len(handle)-1] != '!' {
|
|
return yaml_emitter_set_emitter_error(emitter, "tag handle must end with '!'")
|
|
}
|
|
for i := 1; i < len(handle)-1; i += width(handle[i]) {
|
|
if !is_alpha(handle, i) {
|
|
return yaml_emitter_set_emitter_error(emitter, "tag handle must contain alphanumerical characters only")
|
|
}
|
|
}
|
|
if len(prefix) == 0 {
|
|
return yaml_emitter_set_emitter_error(emitter, "tag prefix must not be empty")
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Check if an anchor is valid.
|
|
func yaml_emitter_analyze_anchor(emitter *yaml_emitter_t, anchor []byte, alias bool) bool {
|
|
if len(anchor) == 0 {
|
|
problem := "anchor value must not be empty"
|
|
if alias {
|
|
problem = "alias value must not be empty"
|
|
}
|
|
return yaml_emitter_set_emitter_error(emitter, problem)
|
|
}
|
|
for i := 0; i < len(anchor); i += width(anchor[i]) {
|
|
if !is_alpha(anchor, i) {
|
|
problem := "anchor value must contain alphanumerical characters only"
|
|
if alias {
|
|
problem = "alias value must contain alphanumerical characters only"
|
|
}
|
|
return yaml_emitter_set_emitter_error(emitter, problem)
|
|
}
|
|
}
|
|
emitter.anchor_data.anchor = anchor
|
|
emitter.anchor_data.alias = alias
|
|
return true
|
|
}
|
|
|
|
// Check if a tag is valid.
|
|
func yaml_emitter_analyze_tag(emitter *yaml_emitter_t, tag []byte) bool {
|
|
if len(tag) == 0 {
|
|
return yaml_emitter_set_emitter_error(emitter, "tag value must not be empty")
|
|
}
|
|
for i := 0; i < len(emitter.tag_directives); i++ {
|
|
tag_directive := &emitter.tag_directives[i]
|
|
if bytes.HasPrefix(tag, tag_directive.prefix) {
|
|
emitter.tag_data.handle = tag_directive.handle
|
|
emitter.tag_data.suffix = tag[len(tag_directive.prefix):]
|
|
return true
|
|
}
|
|
}
|
|
emitter.tag_data.suffix = tag
|
|
return true
|
|
}
|
|
|
|
// Check if a scalar is valid.
|
|
func yaml_emitter_analyze_scalar(emitter *yaml_emitter_t, value []byte) bool {
|
|
var (
|
|
block_indicators = false
|
|
flow_indicators = false
|
|
line_breaks = false
|
|
special_characters = false
|
|
tab_characters = false
|
|
|
|
leading_space = false
|
|
leading_break = false
|
|
trailing_space = false
|
|
trailing_break = false
|
|
break_space = false
|
|
space_break = false
|
|
|
|
preceded_by_whitespace = false
|
|
followed_by_whitespace = false
|
|
previous_space = false
|
|
previous_break = false
|
|
)
|
|
|
|
emitter.scalar_data.value = value
|
|
|
|
if len(value) == 0 {
|
|
emitter.scalar_data.multiline = false
|
|
emitter.scalar_data.flow_plain_allowed = false
|
|
emitter.scalar_data.block_plain_allowed = true
|
|
emitter.scalar_data.single_quoted_allowed = true
|
|
emitter.scalar_data.block_allowed = false
|
|
return true
|
|
}
|
|
|
|
if len(value) >= 3 && ((value[0] == '-' && value[1] == '-' && value[2] == '-') || (value[0] == '.' && value[1] == '.' && value[2] == '.')) {
|
|
block_indicators = true
|
|
flow_indicators = true
|
|
}
|
|
|
|
preceded_by_whitespace = true
|
|
for i, w := 0, 0; i < len(value); i += w {
|
|
w = width(value[i])
|
|
followed_by_whitespace = i+w >= len(value) || is_blank(value, i+w)
|
|
|
|
if i == 0 {
|
|
switch value[i] {
|
|
case '#', ',', '[', ']', '{', '}', '&', '*', '!', '|', '>', '\'', '"', '%', '@', '`':
|
|
flow_indicators = true
|
|
block_indicators = true
|
|
case '?', ':':
|
|
flow_indicators = true
|
|
if followed_by_whitespace {
|
|
block_indicators = true
|
|
}
|
|
case '-':
|
|
if followed_by_whitespace {
|
|
flow_indicators = true
|
|
block_indicators = true
|
|
}
|
|
}
|
|
} else {
|
|
switch value[i] {
|
|
case ',', '?', '[', ']', '{', '}':
|
|
flow_indicators = true
|
|
case ':':
|
|
flow_indicators = true
|
|
if followed_by_whitespace {
|
|
block_indicators = true
|
|
}
|
|
case '#':
|
|
if preceded_by_whitespace {
|
|
flow_indicators = true
|
|
block_indicators = true
|
|
}
|
|
}
|
|
}
|
|
|
|
if value[i] == '\t' {
|
|
tab_characters = true
|
|
} else if !is_printable(value, i) || !is_ascii(value, i) && !emitter.unicode {
|
|
special_characters = true
|
|
}
|
|
if is_space(value, i) {
|
|
if i == 0 {
|
|
leading_space = true
|
|
}
|
|
if i+width(value[i]) == len(value) {
|
|
trailing_space = true
|
|
}
|
|
if previous_break {
|
|
break_space = true
|
|
}
|
|
previous_space = true
|
|
previous_break = false
|
|
} else if is_break(value, i) {
|
|
line_breaks = true
|
|
if i == 0 {
|
|
leading_break = true
|
|
}
|
|
if i+width(value[i]) == len(value) {
|
|
trailing_break = true
|
|
}
|
|
if previous_space {
|
|
space_break = true
|
|
}
|
|
previous_space = false
|
|
previous_break = true
|
|
} else {
|
|
previous_space = false
|
|
previous_break = false
|
|
}
|
|
|
|
// [Go]: Why 'z'? Couldn't be the end of the string as that's the loop condition.
|
|
preceded_by_whitespace = is_blankz(value, i)
|
|
}
|
|
|
|
emitter.scalar_data.multiline = line_breaks
|
|
emitter.scalar_data.flow_plain_allowed = true
|
|
emitter.scalar_data.block_plain_allowed = true
|
|
emitter.scalar_data.single_quoted_allowed = true
|
|
emitter.scalar_data.block_allowed = true
|
|
|
|
if leading_space || leading_break || trailing_space || trailing_break {
|
|
emitter.scalar_data.flow_plain_allowed = false
|
|
emitter.scalar_data.block_plain_allowed = false
|
|
}
|
|
if trailing_space {
|
|
emitter.scalar_data.block_allowed = false
|
|
}
|
|
if break_space {
|
|
emitter.scalar_data.flow_plain_allowed = false
|
|
emitter.scalar_data.block_plain_allowed = false
|
|
emitter.scalar_data.single_quoted_allowed = false
|
|
}
|
|
if space_break || tab_characters || special_characters {
|
|
emitter.scalar_data.flow_plain_allowed = false
|
|
emitter.scalar_data.block_plain_allowed = false
|
|
emitter.scalar_data.single_quoted_allowed = false
|
|
}
|
|
if space_break || special_characters {
|
|
emitter.scalar_data.block_allowed = false
|
|
}
|
|
if line_breaks {
|
|
emitter.scalar_data.flow_plain_allowed = false
|
|
emitter.scalar_data.block_plain_allowed = false
|
|
}
|
|
if flow_indicators {
|
|
emitter.scalar_data.flow_plain_allowed = false
|
|
}
|
|
if block_indicators {
|
|
emitter.scalar_data.block_plain_allowed = false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Check if the event data is valid.
|
|
func yaml_emitter_analyze_event(emitter *yaml_emitter_t, event *yaml_event_t) bool {
|
|
|
|
emitter.anchor_data.anchor = nil
|
|
emitter.tag_data.handle = nil
|
|
emitter.tag_data.suffix = nil
|
|
emitter.scalar_data.value = nil
|
|
|
|
if len(event.head_comment) > 0 {
|
|
emitter.head_comment = event.head_comment
|
|
}
|
|
if len(event.line_comment) > 0 {
|
|
emitter.line_comment = event.line_comment
|
|
}
|
|
if len(event.foot_comment) > 0 {
|
|
emitter.foot_comment = event.foot_comment
|
|
}
|
|
if len(event.tail_comment) > 0 {
|
|
emitter.tail_comment = event.tail_comment
|
|
}
|
|
|
|
switch event.typ {
|
|
case yaml_ALIAS_EVENT:
|
|
if !yaml_emitter_analyze_anchor(emitter, event.anchor, true) {
|
|
return false
|
|
}
|
|
|
|
case yaml_SCALAR_EVENT:
|
|
if len(event.anchor) > 0 {
|
|
if !yaml_emitter_analyze_anchor(emitter, event.anchor, false) {
|
|
return false
|
|
}
|
|
}
|
|
if len(event.tag) > 0 && (emitter.canonical || (!event.implicit && !event.quoted_implicit)) {
|
|
if !yaml_emitter_analyze_tag(emitter, event.tag) {
|
|
return false
|
|
}
|
|
}
|
|
if !yaml_emitter_analyze_scalar(emitter, event.value) {
|
|
return false
|
|
}
|
|
|
|
case yaml_SEQUENCE_START_EVENT:
|
|
if len(event.anchor) > 0 {
|
|
if !yaml_emitter_analyze_anchor(emitter, event.anchor, false) {
|
|
return false
|
|
}
|
|
}
|
|
if len(event.tag) > 0 && (emitter.canonical || !event.implicit) {
|
|
if !yaml_emitter_analyze_tag(emitter, event.tag) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
case yaml_MAPPING_START_EVENT:
|
|
if len(event.anchor) > 0 {
|
|
if !yaml_emitter_analyze_anchor(emitter, event.anchor, false) {
|
|
return false
|
|
}
|
|
}
|
|
if len(event.tag) > 0 && (emitter.canonical || !event.implicit) {
|
|
if !yaml_emitter_analyze_tag(emitter, event.tag) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Write the BOM character.
|
|
func yaml_emitter_write_bom(emitter *yaml_emitter_t) bool {
|
|
if !flush(emitter) {
|
|
return false
|
|
}
|
|
pos := emitter.buffer_pos
|
|
emitter.buffer[pos+0] = '\xEF'
|
|
emitter.buffer[pos+1] = '\xBB'
|
|
emitter.buffer[pos+2] = '\xBF'
|
|
emitter.buffer_pos += 3
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_indent(emitter *yaml_emitter_t) bool {
|
|
indent := emitter.indent
|
|
if indent < 0 {
|
|
indent = 0
|
|
}
|
|
if !emitter.indention || emitter.column > indent || (emitter.column == indent && !emitter.whitespace) {
|
|
if !put_break(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if emitter.foot_indent == indent {
|
|
if !put_break(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
for emitter.column < indent {
|
|
if !put(emitter, ' ') {
|
|
return false
|
|
}
|
|
}
|
|
emitter.whitespace = true
|
|
//emitter.indention = true
|
|
emitter.space_above = false
|
|
emitter.foot_indent = -1
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_indicator(emitter *yaml_emitter_t, indicator []byte, need_whitespace, is_whitespace, is_indention bool) bool {
|
|
if need_whitespace && !emitter.whitespace {
|
|
if !put(emitter, ' ') {
|
|
return false
|
|
}
|
|
}
|
|
if !write_all(emitter, indicator) {
|
|
return false
|
|
}
|
|
emitter.whitespace = is_whitespace
|
|
emitter.indention = (emitter.indention && is_indention)
|
|
emitter.open_ended = false
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_anchor(emitter *yaml_emitter_t, value []byte) bool {
|
|
if !write_all(emitter, value) {
|
|
return false
|
|
}
|
|
emitter.whitespace = false
|
|
emitter.indention = false
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_tag_handle(emitter *yaml_emitter_t, value []byte) bool {
|
|
if !emitter.whitespace {
|
|
if !put(emitter, ' ') {
|
|
return false
|
|
}
|
|
}
|
|
if !write_all(emitter, value) {
|
|
return false
|
|
}
|
|
emitter.whitespace = false
|
|
emitter.indention = false
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_tag_content(emitter *yaml_emitter_t, value []byte, need_whitespace bool) bool {
|
|
if need_whitespace && !emitter.whitespace {
|
|
if !put(emitter, ' ') {
|
|
return false
|
|
}
|
|
}
|
|
for i := 0; i < len(value); {
|
|
var must_write bool
|
|
switch value[i] {
|
|
case ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '_', '.', '~', '*', '\'', '(', ')', '[', ']':
|
|
must_write = true
|
|
default:
|
|
must_write = is_alpha(value, i)
|
|
}
|
|
if must_write {
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
} else {
|
|
w := width(value[i])
|
|
for k := 0; k < w; k++ {
|
|
octet := value[i]
|
|
i++
|
|
if !put(emitter, '%') {
|
|
return false
|
|
}
|
|
|
|
c := octet >> 4
|
|
if c < 10 {
|
|
c += '0'
|
|
} else {
|
|
c += 'A' - 10
|
|
}
|
|
if !put(emitter, c) {
|
|
return false
|
|
}
|
|
|
|
c = octet & 0x0f
|
|
if c < 10 {
|
|
c += '0'
|
|
} else {
|
|
c += 'A' - 10
|
|
}
|
|
if !put(emitter, c) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
}
|
|
emitter.whitespace = false
|
|
emitter.indention = false
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_plain_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {
|
|
if len(value) > 0 && !emitter.whitespace {
|
|
if !put(emitter, ' ') {
|
|
return false
|
|
}
|
|
}
|
|
|
|
spaces := false
|
|
breaks := false
|
|
for i := 0; i < len(value); {
|
|
if is_space(value, i) {
|
|
if allow_breaks && !spaces && emitter.column > emitter.best_width && !is_space(value, i+1) {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
i += width(value[i])
|
|
} else {
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
}
|
|
spaces = true
|
|
} else if is_break(value, i) {
|
|
if !breaks && value[i] == '\n' {
|
|
if !put_break(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !write_break(emitter, value, &i) {
|
|
return false
|
|
}
|
|
//emitter.indention = true
|
|
breaks = true
|
|
} else {
|
|
if breaks {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
emitter.indention = false
|
|
spaces = false
|
|
breaks = false
|
|
}
|
|
}
|
|
|
|
if len(value) > 0 {
|
|
emitter.whitespace = false
|
|
}
|
|
emitter.indention = false
|
|
if emitter.root_context {
|
|
emitter.open_ended = true
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_single_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {
|
|
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'\''}, true, false, false) {
|
|
return false
|
|
}
|
|
|
|
spaces := false
|
|
breaks := false
|
|
for i := 0; i < len(value); {
|
|
if is_space(value, i) {
|
|
if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 && !is_space(value, i+1) {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
i += width(value[i])
|
|
} else {
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
}
|
|
spaces = true
|
|
} else if is_break(value, i) {
|
|
if !breaks && value[i] == '\n' {
|
|
if !put_break(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !write_break(emitter, value, &i) {
|
|
return false
|
|
}
|
|
//emitter.indention = true
|
|
breaks = true
|
|
} else {
|
|
if breaks {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if value[i] == '\'' {
|
|
if !put(emitter, '\'') {
|
|
return false
|
|
}
|
|
}
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
emitter.indention = false
|
|
spaces = false
|
|
breaks = false
|
|
}
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'\''}, false, false, false) {
|
|
return false
|
|
}
|
|
emitter.whitespace = false
|
|
emitter.indention = false
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_double_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {
|
|
spaces := false
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'"'}, true, false, false) {
|
|
return false
|
|
}
|
|
|
|
for i := 0; i < len(value); {
|
|
if !is_printable(value, i) || (!emitter.unicode && !is_ascii(value, i)) ||
|
|
is_bom(value, i) || is_break(value, i) ||
|
|
value[i] == '"' || value[i] == '\\' {
|
|
|
|
octet := value[i]
|
|
|
|
var w int
|
|
var v rune
|
|
switch {
|
|
case octet&0x80 == 0x00:
|
|
w, v = 1, rune(octet&0x7F)
|
|
case octet&0xE0 == 0xC0:
|
|
w, v = 2, rune(octet&0x1F)
|
|
case octet&0xF0 == 0xE0:
|
|
w, v = 3, rune(octet&0x0F)
|
|
case octet&0xF8 == 0xF0:
|
|
w, v = 4, rune(octet&0x07)
|
|
}
|
|
for k := 1; k < w; k++ {
|
|
octet = value[i+k]
|
|
v = (v << 6) + (rune(octet) & 0x3F)
|
|
}
|
|
i += w
|
|
|
|
if !put(emitter, '\\') {
|
|
return false
|
|
}
|
|
|
|
var ok bool
|
|
switch v {
|
|
case 0x00:
|
|
ok = put(emitter, '0')
|
|
case 0x07:
|
|
ok = put(emitter, 'a')
|
|
case 0x08:
|
|
ok = put(emitter, 'b')
|
|
case 0x09:
|
|
ok = put(emitter, 't')
|
|
case 0x0A:
|
|
ok = put(emitter, 'n')
|
|
case 0x0b:
|
|
ok = put(emitter, 'v')
|
|
case 0x0c:
|
|
ok = put(emitter, 'f')
|
|
case 0x0d:
|
|
ok = put(emitter, 'r')
|
|
case 0x1b:
|
|
ok = put(emitter, 'e')
|
|
case 0x22:
|
|
ok = put(emitter, '"')
|
|
case 0x5c:
|
|
ok = put(emitter, '\\')
|
|
case 0x85:
|
|
ok = put(emitter, 'N')
|
|
case 0xA0:
|
|
ok = put(emitter, '_')
|
|
case 0x2028:
|
|
ok = put(emitter, 'L')
|
|
case 0x2029:
|
|
ok = put(emitter, 'P')
|
|
default:
|
|
if v <= 0xFF {
|
|
ok = put(emitter, 'x')
|
|
w = 2
|
|
} else if v <= 0xFFFF {
|
|
ok = put(emitter, 'u')
|
|
w = 4
|
|
} else {
|
|
ok = put(emitter, 'U')
|
|
w = 8
|
|
}
|
|
for k := (w - 1) * 4; ok && k >= 0; k -= 4 {
|
|
digit := byte((v >> uint(k)) & 0x0F)
|
|
if digit < 10 {
|
|
ok = put(emitter, digit+'0')
|
|
} else {
|
|
ok = put(emitter, digit+'A'-10)
|
|
}
|
|
}
|
|
}
|
|
if !ok {
|
|
return false
|
|
}
|
|
spaces = false
|
|
} else if is_space(value, i) {
|
|
if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if is_space(value, i+1) {
|
|
if !put(emitter, '\\') {
|
|
return false
|
|
}
|
|
}
|
|
i += width(value[i])
|
|
} else if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
spaces = true
|
|
} else {
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
spaces = false
|
|
}
|
|
}
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'"'}, false, false, false) {
|
|
return false
|
|
}
|
|
emitter.whitespace = false
|
|
emitter.indention = false
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_block_scalar_hints(emitter *yaml_emitter_t, value []byte) bool {
|
|
if is_space(value, 0) || is_break(value, 0) {
|
|
indent_hint := []byte{'0' + byte(emitter.best_indent)}
|
|
if !yaml_emitter_write_indicator(emitter, indent_hint, false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
emitter.open_ended = false
|
|
|
|
var chomp_hint [1]byte
|
|
if len(value) == 0 {
|
|
chomp_hint[0] = '-'
|
|
} else {
|
|
i := len(value) - 1
|
|
for value[i]&0xC0 == 0x80 {
|
|
i--
|
|
}
|
|
if !is_break(value, i) {
|
|
chomp_hint[0] = '-'
|
|
} else if i == 0 {
|
|
chomp_hint[0] = '+'
|
|
emitter.open_ended = true
|
|
} else {
|
|
i--
|
|
for value[i]&0xC0 == 0x80 {
|
|
i--
|
|
}
|
|
if is_break(value, i) {
|
|
chomp_hint[0] = '+'
|
|
emitter.open_ended = true
|
|
}
|
|
}
|
|
}
|
|
if chomp_hint[0] != 0 {
|
|
if !yaml_emitter_write_indicator(emitter, chomp_hint[:], false, false, false) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_literal_scalar(emitter *yaml_emitter_t, value []byte) bool {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'|'}, true, false, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_block_scalar_hints(emitter, value) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
//emitter.indention = true
|
|
emitter.whitespace = true
|
|
breaks := true
|
|
for i := 0; i < len(value); {
|
|
if is_break(value, i) {
|
|
if !write_break(emitter, value, &i) {
|
|
return false
|
|
}
|
|
//emitter.indention = true
|
|
breaks = true
|
|
} else {
|
|
if breaks {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
emitter.indention = false
|
|
breaks = false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_folded_scalar(emitter *yaml_emitter_t, value []byte) bool {
|
|
if !yaml_emitter_write_indicator(emitter, []byte{'>'}, true, false, false) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_write_block_scalar_hints(emitter, value) {
|
|
return false
|
|
}
|
|
if !yaml_emitter_process_line_comment(emitter) {
|
|
return false
|
|
}
|
|
|
|
//emitter.indention = true
|
|
emitter.whitespace = true
|
|
|
|
breaks := true
|
|
leading_spaces := true
|
|
for i := 0; i < len(value); {
|
|
if is_break(value, i) {
|
|
if !breaks && !leading_spaces && value[i] == '\n' {
|
|
k := 0
|
|
for is_break(value, k) {
|
|
k += width(value[k])
|
|
}
|
|
if !is_blankz(value, k) {
|
|
if !put_break(emitter) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
if !write_break(emitter, value, &i) {
|
|
return false
|
|
}
|
|
//emitter.indention = true
|
|
breaks = true
|
|
} else {
|
|
if breaks {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
leading_spaces = is_blank(value, i)
|
|
}
|
|
if !breaks && is_space(value, i) && !is_space(value, i+1) && emitter.column > emitter.best_width {
|
|
if !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
i += width(value[i])
|
|
} else {
|
|
if !write(emitter, value, &i) {
|
|
return false
|
|
}
|
|
}
|
|
emitter.indention = false
|
|
breaks = false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func yaml_emitter_write_comment(emitter *yaml_emitter_t, comment []byte) bool {
|
|
breaks := false
|
|
pound := false
|
|
for i := 0; i < len(comment); {
|
|
if is_break(comment, i) {
|
|
if !write_break(emitter, comment, &i) {
|
|
return false
|
|
}
|
|
//emitter.indention = true
|
|
breaks = true
|
|
pound = false
|
|
} else {
|
|
if breaks && !yaml_emitter_write_indent(emitter) {
|
|
return false
|
|
}
|
|
if !pound {
|
|
if comment[i] != '#' && (!put(emitter, '#') || !put(emitter, ' ')) {
|
|
return false
|
|
}
|
|
pound = true
|
|
}
|
|
if !write(emitter, comment, &i) {
|
|
return false
|
|
}
|
|
emitter.indention = false
|
|
breaks = false
|
|
}
|
|
}
|
|
if !breaks && !put_break(emitter) {
|
|
return false
|
|
}
|
|
|
|
emitter.whitespace = true
|
|
//emitter.indention = true
|
|
return true
|
|
}
|