| package yaml |
| |
| import ( |
| "bytes" |
| ) |
| |
| // Flush the buffer if needed. |
| func flush(emitter *yaml_emitter_t) bool { |
| if emitter.buffer_pos+5 >= len(emitter.buffer) { |
| return yaml_emitter_flush(emitter) |
| } |
| return true |
| } |
| |
| // Put a character to the output buffer. |
| func put(emitter *yaml_emitter_t, value byte) bool { |
| if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) { |
| return false |
| } |
| emitter.buffer[emitter.buffer_pos] = value |
| emitter.buffer_pos++ |
| emitter.column++ |
| return true |
| } |
| |
| // Put a line break to the output buffer. |
| func put_break(emitter *yaml_emitter_t) bool { |
| if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) { |
| return false |
| } |
| switch emitter.line_break { |
| case yaml_CR_BREAK: |
| emitter.buffer[emitter.buffer_pos] = '\r' |
| emitter.buffer_pos += 1 |
| case yaml_LN_BREAK: |
| emitter.buffer[emitter.buffer_pos] = '\n' |
| emitter.buffer_pos += 1 |
| case yaml_CRLN_BREAK: |
| emitter.buffer[emitter.buffer_pos+0] = '\r' |
| emitter.buffer[emitter.buffer_pos+1] = '\n' |
| emitter.buffer_pos += 2 |
| default: |
| panic("unknown line break setting") |
| } |
| emitter.column = 0 |
| emitter.line++ |
| return true |
| } |
| |
| // Copy a character from a string into buffer. |
| func write(emitter *yaml_emitter_t, s []byte, i *int) bool { |
| if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) { |
| return false |
| } |
| p := emitter.buffer_pos |
| w := width(s[*i]) |
| switch w { |
| case 4: |
| emitter.buffer[p+3] = s[*i+3] |
| fallthrough |
| case 3: |
| emitter.buffer[p+2] = s[*i+2] |
| fallthrough |
| case 2: |
| emitter.buffer[p+1] = s[*i+1] |
| fallthrough |
| case 1: |
| emitter.buffer[p+0] = s[*i+0] |
| default: |
| panic("unknown character width") |
| } |
| emitter.column++ |
| emitter.buffer_pos += w |
| *i += w |
| return true |
| } |
| |
| // Write a whole string into buffer. |
| func write_all(emitter *yaml_emitter_t, s []byte) bool { |
| for i := 0; i < len(s); { |
| if !write(emitter, s, &i) { |
| return false |
| } |
| } |
| return true |
| } |
| |
| // Copy a line break character from a string into buffer. |
| func write_break(emitter *yaml_emitter_t, s []byte, i *int) bool { |
| if s[*i] == '\n' { |
| if !put_break(emitter) { |
| return false |
| } |
| *i++ |
| } else { |
| if !write(emitter, s, i) { |
| return false |
| } |
| emitter.column = 0 |
| emitter.line++ |
| } |
| return true |
| } |
| |
| // Set an emitter error and return false. |
| func yaml_emitter_set_emitter_error(emitter *yaml_emitter_t, problem string) bool { |
| emitter.error = yaml_EMITTER_ERROR |
| emitter.problem = problem |
| return false |
| } |
| |
| // Emit an event. |
| func yaml_emitter_emit(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| emitter.events = append(emitter.events, *event) |
| for !yaml_emitter_need_more_events(emitter) { |
| event := &emitter.events[emitter.events_head] |
| if !yaml_emitter_analyze_event(emitter, event) { |
| return false |
| } |
| if !yaml_emitter_state_machine(emitter, event) { |
| return false |
| } |
| yaml_event_delete(event) |
| emitter.events_head++ |
| } |
| return true |
| } |
| |
| // Check if we need to accumulate more events before emitting. |
| // |
| // We accumulate extra |
| // - 1 event for DOCUMENT-START |
| // - 2 events for SEQUENCE-START |
| // - 3 events for MAPPING-START |
| // |
| func yaml_emitter_need_more_events(emitter *yaml_emitter_t) bool { |
| if emitter.events_head == len(emitter.events) { |
| return true |
| } |
| var accumulate int |
| switch emitter.events[emitter.events_head].typ { |
| case yaml_DOCUMENT_START_EVENT: |
| accumulate = 1 |
| break |
| case yaml_SEQUENCE_START_EVENT: |
| accumulate = 2 |
| break |
| case yaml_MAPPING_START_EVENT: |
| accumulate = 3 |
| break |
| default: |
| return false |
| } |
| if len(emitter.events)-emitter.events_head > accumulate { |
| return false |
| } |
| var level int |
| for i := emitter.events_head; i < len(emitter.events); i++ { |
| switch emitter.events[i].typ { |
| case yaml_STREAM_START_EVENT, yaml_DOCUMENT_START_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT: |
| level++ |
| case yaml_STREAM_END_EVENT, yaml_DOCUMENT_END_EVENT, yaml_SEQUENCE_END_EVENT, yaml_MAPPING_END_EVENT: |
| level-- |
| } |
| if level == 0 { |
| return false |
| } |
| } |
| return true |
| } |
| |
| // Append a directive to the directives stack. |
| func yaml_emitter_append_tag_directive(emitter *yaml_emitter_t, value *yaml_tag_directive_t, allow_duplicates bool) bool { |
| for i := 0; i < len(emitter.tag_directives); i++ { |
| if bytes.Equal(value.handle, emitter.tag_directives[i].handle) { |
| if allow_duplicates { |
| return true |
| } |
| return yaml_emitter_set_emitter_error(emitter, "duplicate %TAG directive") |
| } |
| } |
| |
| // [Go] Do we actually need to copy this given garbage collection |
| // and the lack of deallocating destructors? |
| tag_copy := yaml_tag_directive_t{ |
| handle: make([]byte, len(value.handle)), |
| prefix: make([]byte, len(value.prefix)), |
| } |
| copy(tag_copy.handle, value.handle) |
| copy(tag_copy.prefix, value.prefix) |
| emitter.tag_directives = append(emitter.tag_directives, tag_copy) |
| return true |
| } |
| |
| // Increase the indentation level. |
| func yaml_emitter_increase_indent(emitter *yaml_emitter_t, flow, indentless bool) bool { |
| emitter.indents = append(emitter.indents, emitter.indent) |
| if emitter.indent < 0 { |
| if flow { |
| emitter.indent = emitter.best_indent |
| } else { |
| emitter.indent = 0 |
| } |
| } else if !indentless { |
| emitter.indent += emitter.best_indent |
| } |
| return true |
| } |
| |
| // State dispatcher. |
| func yaml_emitter_state_machine(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| switch emitter.state { |
| default: |
| case yaml_EMIT_STREAM_START_STATE: |
| return yaml_emitter_emit_stream_start(emitter, event) |
| |
| case yaml_EMIT_FIRST_DOCUMENT_START_STATE: |
| return yaml_emitter_emit_document_start(emitter, event, true) |
| |
| case yaml_EMIT_DOCUMENT_START_STATE: |
| return yaml_emitter_emit_document_start(emitter, event, false) |
| |
| case yaml_EMIT_DOCUMENT_CONTENT_STATE: |
| return yaml_emitter_emit_document_content(emitter, event) |
| |
| case yaml_EMIT_DOCUMENT_END_STATE: |
| return yaml_emitter_emit_document_end(emitter, event) |
| |
| case yaml_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE: |
| return yaml_emitter_emit_flow_sequence_item(emitter, event, true) |
| |
| case yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE: |
| return yaml_emitter_emit_flow_sequence_item(emitter, event, false) |
| |
| case yaml_EMIT_FLOW_MAPPING_FIRST_KEY_STATE: |
| return yaml_emitter_emit_flow_mapping_key(emitter, event, true) |
| |
| case yaml_EMIT_FLOW_MAPPING_KEY_STATE: |
| return yaml_emitter_emit_flow_mapping_key(emitter, event, false) |
| |
| case yaml_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE: |
| return yaml_emitter_emit_flow_mapping_value(emitter, event, true) |
| |
| case yaml_EMIT_FLOW_MAPPING_VALUE_STATE: |
| return yaml_emitter_emit_flow_mapping_value(emitter, event, false) |
| |
| case yaml_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE: |
| return yaml_emitter_emit_block_sequence_item(emitter, event, true) |
| |
| case yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE: |
| return yaml_emitter_emit_block_sequence_item(emitter, event, false) |
| |
| case yaml_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE: |
| return yaml_emitter_emit_block_mapping_key(emitter, event, true) |
| |
| case yaml_EMIT_BLOCK_MAPPING_KEY_STATE: |
| return yaml_emitter_emit_block_mapping_key(emitter, event, false) |
| |
| case yaml_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE: |
| return yaml_emitter_emit_block_mapping_value(emitter, event, true) |
| |
| case yaml_EMIT_BLOCK_MAPPING_VALUE_STATE: |
| return yaml_emitter_emit_block_mapping_value(emitter, event, false) |
| |
| case yaml_EMIT_END_STATE: |
| return yaml_emitter_set_emitter_error(emitter, "expected nothing after STREAM-END") |
| } |
| panic("invalid emitter state") |
| } |
| |
| // Expect STREAM-START. |
| func yaml_emitter_emit_stream_start(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| if event.typ != yaml_STREAM_START_EVENT { |
| return yaml_emitter_set_emitter_error(emitter, "expected STREAM-START") |
| } |
| if emitter.encoding == yaml_ANY_ENCODING { |
| emitter.encoding = event.encoding |
| if emitter.encoding == yaml_ANY_ENCODING { |
| emitter.encoding = yaml_UTF8_ENCODING |
| } |
| } |
| if emitter.best_indent < 2 || emitter.best_indent > 9 { |
| emitter.best_indent = 2 |
| } |
| if emitter.best_width >= 0 && emitter.best_width <= emitter.best_indent*2 { |
| emitter.best_width = 80 |
| } |
| if emitter.best_width < 0 { |
| emitter.best_width = 1<<31 - 1 |
| } |
| if emitter.line_break == yaml_ANY_BREAK { |
| emitter.line_break = yaml_LN_BREAK |
| } |
| |
| emitter.indent = -1 |
| emitter.line = 0 |
| emitter.column = 0 |
| emitter.whitespace = true |
| emitter.indention = true |
| |
| if emitter.encoding != yaml_UTF8_ENCODING { |
| if !yaml_emitter_write_bom(emitter) { |
| return false |
| } |
| } |
| emitter.state = yaml_EMIT_FIRST_DOCUMENT_START_STATE |
| return true |
| } |
| |
| // Expect DOCUMENT-START or STREAM-END. |
| func yaml_emitter_emit_document_start(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool { |
| |
| if event.typ == yaml_DOCUMENT_START_EVENT { |
| |
| if event.version_directive != nil { |
| if !yaml_emitter_analyze_version_directive(emitter, event.version_directive) { |
| return false |
| } |
| } |
| |
| for i := 0; i < len(event.tag_directives); i++ { |
| tag_directive := &event.tag_directives[i] |
| if !yaml_emitter_analyze_tag_directive(emitter, tag_directive) { |
| return false |
| } |
| if !yaml_emitter_append_tag_directive(emitter, tag_directive, false) { |
| return false |
| } |
| } |
| |
| for i := 0; i < len(default_tag_directives); i++ { |
| tag_directive := &default_tag_directives[i] |
| if !yaml_emitter_append_tag_directive(emitter, tag_directive, true) { |
| return false |
| } |
| } |
| |
| implicit := event.implicit |
| if !first || emitter.canonical { |
| implicit = false |
| } |
| |
| if emitter.open_ended && (event.version_directive != nil || len(event.tag_directives) > 0) { |
| if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| |
| if event.version_directive != nil { |
| implicit = false |
| if !yaml_emitter_write_indicator(emitter, []byte("%YAML"), true, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_indicator(emitter, []byte("1.1"), true, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| |
| if len(event.tag_directives) > 0 { |
| implicit = false |
| for i := 0; i < len(event.tag_directives); i++ { |
| tag_directive := &event.tag_directives[i] |
| if !yaml_emitter_write_indicator(emitter, []byte("%TAG"), true, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_tag_handle(emitter, tag_directive.handle) { |
| return false |
| } |
| if !yaml_emitter_write_tag_content(emitter, tag_directive.prefix, true) { |
| return false |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| } |
| |
| if yaml_emitter_check_empty_document(emitter) { |
| implicit = false |
| } |
| if !implicit { |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| if !yaml_emitter_write_indicator(emitter, []byte("---"), true, false, false) { |
| return false |
| } |
| if emitter.canonical { |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| } |
| |
| emitter.state = yaml_EMIT_DOCUMENT_CONTENT_STATE |
| return true |
| } |
| |
| if event.typ == yaml_STREAM_END_EVENT { |
| if emitter.open_ended { |
| if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| if !yaml_emitter_flush(emitter) { |
| return false |
| } |
| emitter.state = yaml_EMIT_END_STATE |
| return true |
| } |
| |
| return yaml_emitter_set_emitter_error(emitter, "expected DOCUMENT-START or STREAM-END") |
| } |
| |
| // Expect the root node. |
| func yaml_emitter_emit_document_content(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| emitter.states = append(emitter.states, yaml_EMIT_DOCUMENT_END_STATE) |
| return yaml_emitter_emit_node(emitter, event, true, false, false, false) |
| } |
| |
| // Expect DOCUMENT-END. |
| func yaml_emitter_emit_document_end(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| if event.typ != yaml_DOCUMENT_END_EVENT { |
| return yaml_emitter_set_emitter_error(emitter, "expected DOCUMENT-END") |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| if !event.implicit { |
| // [Go] Allocate the slice elsewhere. |
| if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) { |
| return false |
| } |
| 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 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 { |
| 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_indicator(emitter, []byte{','}, false, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| if !yaml_emitter_write_indicator(emitter, []byte{']'}, false, false, false) { |
| return false |
| } |
| emitter.state = emitter.states[len(emitter.states)-1] |
| emitter.states = emitter.states[:len(emitter.states)-1] |
| |
| return true |
| } |
| |
| if !first { |
| if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) { |
| return false |
| } |
| } |
| |
| if emitter.canonical || emitter.column > emitter.best_width { |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| emitter.states = append(emitter.states, yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE) |
| return yaml_emitter_emit_node(emitter, event, false, true, false, false) |
| } |
| |
| // Expect a flow key node. |
| func yaml_emitter_emit_flow_mapping_key(emitter *yaml_emitter_t, event *yaml_event_t, first 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 { |
| 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_indicator(emitter, []byte{','}, false, false, false) { |
| return false |
| } |
| if !yaml_emitter_write_indent(emitter) { |
| return false |
| } |
| } |
| if !yaml_emitter_write_indicator(emitter, []byte{'}'}, false, false, false) { |
| return false |
| } |
| emitter.state = emitter.states[len(emitter.states)-1] |
| emitter.states = emitter.states[:len(emitter.states)-1] |
| return true |
| } |
| |
| if !first { |
| if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) { |
| 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 |
| } |
| } |
| emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_KEY_STATE) |
| return yaml_emitter_emit_node(emitter, event, false, false, true, false) |
| } |
| |
| // 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, emitter.mapping_context && !emitter.indention) { |
| 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_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) |
| return yaml_emitter_emit_node(emitter, event, false, true, false, false) |
| } |
| |
| // 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 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 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 |
| } |
| } |
| emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_KEY_STATE) |
| return yaml_emitter_emit_node(emitter, event, false, false, true, false) |
| } |
| |
| // 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, |
| "expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS") |
| } |
| } |
| |
| // 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 achor. |
| 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") |
| } |
| |
| // 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 |
| |
| 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 !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 || special_characters { |
| emitter.scalar_data.flow_plain_allowed = false |
| emitter.scalar_data.block_plain_allowed = false |
| emitter.scalar_data.single_quoted_allowed = false |
| 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 |
| |
| 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 |
| } |
| } |
| for emitter.column < indent { |
| if !put(emitter, ' ') { |
| return false |
| } |
| } |
| emitter.whitespace = true |
| emitter.indention = true |
| 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 !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 |
| } |
| } |
| |
| 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 !put_break(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 !put_break(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 |
| } |
