| package yaml |
| |
| import ( |
| "bytes" |
| ) |
| |
| // The parser implements the following grammar: |
| // |
| // stream ::= STREAM-START implicit_document? explicit_document* STREAM-END |
| // implicit_document ::= block_node DOCUMENT-END* |
| // explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* |
| // block_node_or_indentless_sequence ::= |
| // ALIAS |
| // | properties (block_content | indentless_block_sequence)? |
| // | block_content |
| // | indentless_block_sequence |
| // block_node ::= ALIAS |
| // | properties block_content? |
| // | block_content |
| // flow_node ::= ALIAS |
| // | properties flow_content? |
| // | flow_content |
| // properties ::= TAG ANCHOR? | ANCHOR TAG? |
| // block_content ::= block_collection | flow_collection | SCALAR |
| // flow_content ::= flow_collection | SCALAR |
| // block_collection ::= block_sequence | block_mapping |
| // flow_collection ::= flow_sequence | flow_mapping |
| // block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END |
| // indentless_sequence ::= (BLOCK-ENTRY block_node?)+ |
| // block_mapping ::= BLOCK-MAPPING_START |
| // ((KEY block_node_or_indentless_sequence?)? |
| // (VALUE block_node_or_indentless_sequence?)?)* |
| // BLOCK-END |
| // flow_sequence ::= FLOW-SEQUENCE-START |
| // (flow_sequence_entry FLOW-ENTRY)* |
| // flow_sequence_entry? |
| // FLOW-SEQUENCE-END |
| // flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // flow_mapping ::= FLOW-MAPPING-START |
| // (flow_mapping_entry FLOW-ENTRY)* |
| // flow_mapping_entry? |
| // FLOW-MAPPING-END |
| // flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| |
| // Peek the next token in the token queue. |
| func peek_token(parser *yaml_parser_t) *yaml_token_t { |
| if parser.token_available || yaml_parser_fetch_more_tokens(parser) { |
| return &parser.tokens[parser.tokens_head] |
| } |
| return nil |
| } |
| |
| // Remove the next token from the queue (must be called after peek_token). |
| func skip_token(parser *yaml_parser_t) { |
| parser.token_available = false |
| parser.tokens_parsed++ |
| parser.stream_end_produced = parser.tokens[parser.tokens_head].typ == yaml_STREAM_END_TOKEN |
| parser.tokens_head++ |
| } |
| |
| // Get the next event. |
| func yaml_parser_parse(parser *yaml_parser_t, event *yaml_event_t) bool { |
| // Erase the event object. |
| *event = yaml_event_t{} |
| |
| // No events after the end of the stream or error. |
| if parser.stream_end_produced || parser.error != yaml_NO_ERROR || parser.state == yaml_PARSE_END_STATE { |
| return true |
| } |
| |
| // Generate the next event. |
| return yaml_parser_state_machine(parser, event) |
| } |
| |
| // Set parser error. |
| func yaml_parser_set_parser_error(parser *yaml_parser_t, problem string, problem_mark yaml_mark_t) bool { |
| parser.error = yaml_PARSER_ERROR |
| parser.problem = problem |
| parser.problem_mark = problem_mark |
| return false |
| } |
| |
| func yaml_parser_set_parser_error_context(parser *yaml_parser_t, context string, context_mark yaml_mark_t, problem string, problem_mark yaml_mark_t) bool { |
| parser.error = yaml_PARSER_ERROR |
| parser.context = context |
| parser.context_mark = context_mark |
| parser.problem = problem |
| parser.problem_mark = problem_mark |
| return false |
| } |
| |
| // State dispatcher. |
| func yaml_parser_state_machine(parser *yaml_parser_t, event *yaml_event_t) bool { |
| //trace("yaml_parser_state_machine", "state:", parser.state.String()) |
| |
| switch parser.state { |
| case yaml_PARSE_STREAM_START_STATE: |
| return yaml_parser_parse_stream_start(parser, event) |
| |
| case yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE: |
| return yaml_parser_parse_document_start(parser, event, true) |
| |
| case yaml_PARSE_DOCUMENT_START_STATE: |
| return yaml_parser_parse_document_start(parser, event, false) |
| |
| case yaml_PARSE_DOCUMENT_CONTENT_STATE: |
| return yaml_parser_parse_document_content(parser, event) |
| |
| case yaml_PARSE_DOCUMENT_END_STATE: |
| return yaml_parser_parse_document_end(parser, event) |
| |
| case yaml_PARSE_BLOCK_NODE_STATE: |
| return yaml_parser_parse_node(parser, event, true, false) |
| |
| case yaml_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE: |
| return yaml_parser_parse_node(parser, event, true, true) |
| |
| case yaml_PARSE_FLOW_NODE_STATE: |
| return yaml_parser_parse_node(parser, event, false, false) |
| |
| case yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE: |
| return yaml_parser_parse_block_sequence_entry(parser, event, true) |
| |
| case yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE: |
| return yaml_parser_parse_block_sequence_entry(parser, event, false) |
| |
| case yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE: |
| return yaml_parser_parse_indentless_sequence_entry(parser, event) |
| |
| case yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE: |
| return yaml_parser_parse_block_mapping_key(parser, event, true) |
| |
| case yaml_PARSE_BLOCK_MAPPING_KEY_STATE: |
| return yaml_parser_parse_block_mapping_key(parser, event, false) |
| |
| case yaml_PARSE_BLOCK_MAPPING_VALUE_STATE: |
| return yaml_parser_parse_block_mapping_value(parser, event) |
| |
| case yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE: |
| return yaml_parser_parse_flow_sequence_entry(parser, event, true) |
| |
| case yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE: |
| return yaml_parser_parse_flow_sequence_entry(parser, event, false) |
| |
| case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE: |
| return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event) |
| |
| case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE: |
| return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event) |
| |
| case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE: |
| return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event) |
| |
| case yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE: |
| return yaml_parser_parse_flow_mapping_key(parser, event, true) |
| |
| case yaml_PARSE_FLOW_MAPPING_KEY_STATE: |
| return yaml_parser_parse_flow_mapping_key(parser, event, false) |
| |
| case yaml_PARSE_FLOW_MAPPING_VALUE_STATE: |
| return yaml_parser_parse_flow_mapping_value(parser, event, false) |
| |
| case yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE: |
| return yaml_parser_parse_flow_mapping_value(parser, event, true) |
| |
| default: |
| panic("invalid parser state") |
| } |
| return false |
| } |
| |
| // Parse the production: |
| // stream ::= STREAM-START implicit_document? explicit_document* STREAM-END |
| // ************ |
| func yaml_parser_parse_stream_start(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_STREAM_START_TOKEN { |
| return yaml_parser_set_parser_error(parser, "did not find expected <stream-start>", token.start_mark) |
| } |
| parser.state = yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE |
| *event = yaml_event_t{ |
| typ: yaml_STREAM_START_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| encoding: token.encoding, |
| } |
| skip_token(parser) |
| return true |
| } |
| |
| // Parse the productions: |
| // implicit_document ::= block_node DOCUMENT-END* |
| // * |
| // explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* |
| // ************************* |
| func yaml_parser_parse_document_start(parser *yaml_parser_t, event *yaml_event_t, implicit bool) bool { |
| |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| // Parse extra document end indicators. |
| if !implicit { |
| for token.typ == yaml_DOCUMENT_END_TOKEN { |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| } |
| } |
| |
| if implicit && token.typ != yaml_VERSION_DIRECTIVE_TOKEN && |
| token.typ != yaml_TAG_DIRECTIVE_TOKEN && |
| token.typ != yaml_DOCUMENT_START_TOKEN && |
| token.typ != yaml_STREAM_END_TOKEN { |
| // Parse an implicit document. |
| if !yaml_parser_process_directives(parser, nil, nil) { |
| return false |
| } |
| parser.states = append(parser.states, yaml_PARSE_DOCUMENT_END_STATE) |
| parser.state = yaml_PARSE_BLOCK_NODE_STATE |
| |
| *event = yaml_event_t{ |
| typ: yaml_DOCUMENT_START_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| } |
| |
| } else if token.typ != yaml_STREAM_END_TOKEN { |
| // Parse an explicit document. |
| var version_directive *yaml_version_directive_t |
| var tag_directives []yaml_tag_directive_t |
| start_mark := token.start_mark |
| if !yaml_parser_process_directives(parser, &version_directive, &tag_directives) { |
| return false |
| } |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_DOCUMENT_START_TOKEN { |
| yaml_parser_set_parser_error(parser, |
| "did not find expected <document start>", token.start_mark) |
| return false |
| } |
| parser.states = append(parser.states, yaml_PARSE_DOCUMENT_END_STATE) |
| parser.state = yaml_PARSE_DOCUMENT_CONTENT_STATE |
| end_mark := token.end_mark |
| |
| *event = yaml_event_t{ |
| typ: yaml_DOCUMENT_START_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| version_directive: version_directive, |
| tag_directives: tag_directives, |
| implicit: false, |
| } |
| skip_token(parser) |
| |
| } else { |
| // Parse the stream end. |
| parser.state = yaml_PARSE_END_STATE |
| *event = yaml_event_t{ |
| typ: yaml_STREAM_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| } |
| skip_token(parser) |
| } |
| |
| return true |
| } |
| |
| // Parse the productions: |
| // explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* |
| // *********** |
| // |
| func yaml_parser_parse_document_content(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ == yaml_VERSION_DIRECTIVE_TOKEN || |
| token.typ == yaml_TAG_DIRECTIVE_TOKEN || |
| token.typ == yaml_DOCUMENT_START_TOKEN || |
| token.typ == yaml_DOCUMENT_END_TOKEN || |
| token.typ == yaml_STREAM_END_TOKEN { |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| return yaml_parser_process_empty_scalar(parser, event, |
| token.start_mark) |
| } |
| return yaml_parser_parse_node(parser, event, true, false) |
| } |
| |
| // Parse the productions: |
| // implicit_document ::= block_node DOCUMENT-END* |
| // ************* |
| // explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* |
| // |
| func yaml_parser_parse_document_end(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| start_mark := token.start_mark |
| end_mark := token.start_mark |
| |
| implicit := true |
| if token.typ == yaml_DOCUMENT_END_TOKEN { |
| end_mark = token.end_mark |
| skip_token(parser) |
| implicit = false |
| } |
| |
| parser.tag_directives = parser.tag_directives[:0] |
| |
| parser.state = yaml_PARSE_DOCUMENT_START_STATE |
| *event = yaml_event_t{ |
| typ: yaml_DOCUMENT_END_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| implicit: implicit, |
| } |
| return true |
| } |
| |
| // Parse the productions: |
| // block_node_or_indentless_sequence ::= |
| // ALIAS |
| // ***** |
| // | properties (block_content | indentless_block_sequence)? |
| // ********** * |
| // | block_content | indentless_block_sequence |
| // * |
| // block_node ::= ALIAS |
| // ***** |
| // | properties block_content? |
| // ********** * |
| // | block_content |
| // * |
| // flow_node ::= ALIAS |
| // ***** |
| // | properties flow_content? |
| // ********** * |
| // | flow_content |
| // * |
| // properties ::= TAG ANCHOR? | ANCHOR TAG? |
| // ************************* |
| // block_content ::= block_collection | flow_collection | SCALAR |
| // ****** |
| // flow_content ::= flow_collection | SCALAR |
| // ****** |
| func yaml_parser_parse_node(parser *yaml_parser_t, event *yaml_event_t, block, indentless_sequence bool) bool { |
| //defer trace("yaml_parser_parse_node", "block:", block, "indentless_sequence:", indentless_sequence)() |
| |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| if token.typ == yaml_ALIAS_TOKEN { |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| *event = yaml_event_t{ |
| typ: yaml_ALIAS_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| anchor: token.value, |
| } |
| skip_token(parser) |
| return true |
| } |
| |
| start_mark := token.start_mark |
| end_mark := token.start_mark |
| |
| var tag_token bool |
| var tag_handle, tag_suffix, anchor []byte |
| var tag_mark yaml_mark_t |
| if token.typ == yaml_ANCHOR_TOKEN { |
| anchor = token.value |
| start_mark = token.start_mark |
| end_mark = token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ == yaml_TAG_TOKEN { |
| tag_token = true |
| tag_handle = token.value |
| tag_suffix = token.suffix |
| tag_mark = token.start_mark |
| end_mark = token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| } |
| } else if token.typ == yaml_TAG_TOKEN { |
| tag_token = true |
| tag_handle = token.value |
| tag_suffix = token.suffix |
| start_mark = token.start_mark |
| tag_mark = token.start_mark |
| end_mark = token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ == yaml_ANCHOR_TOKEN { |
| anchor = token.value |
| end_mark = token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| } |
| } |
| |
| var tag []byte |
| if tag_token { |
| if len(tag_handle) == 0 { |
| tag = tag_suffix |
| tag_suffix = nil |
| } else { |
| for i := range parser.tag_directives { |
| if bytes.Equal(parser.tag_directives[i].handle, tag_handle) { |
| tag = append([]byte(nil), parser.tag_directives[i].prefix...) |
| tag = append(tag, tag_suffix...) |
| break |
| } |
| } |
| if len(tag) == 0 { |
| yaml_parser_set_parser_error_context(parser, |
| "while parsing a node", start_mark, |
| "found undefined tag handle", tag_mark) |
| return false |
| } |
| } |
| } |
| |
| implicit := len(tag) == 0 |
| if indentless_sequence && token.typ == yaml_BLOCK_ENTRY_TOKEN { |
| end_mark = token.end_mark |
| parser.state = yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_SEQUENCE_START_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| implicit: implicit, |
| style: yaml_style_t(yaml_BLOCK_SEQUENCE_STYLE), |
| } |
| return true |
| } |
| if token.typ == yaml_SCALAR_TOKEN { |
| var plain_implicit, quoted_implicit bool |
| end_mark = token.end_mark |
| if (len(tag) == 0 && token.style == yaml_PLAIN_SCALAR_STYLE) || (len(tag) == 1 && tag[0] == '!') { |
| plain_implicit = true |
| } else if len(tag) == 0 { |
| quoted_implicit = true |
| } |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| |
| *event = yaml_event_t{ |
| typ: yaml_SCALAR_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| value: token.value, |
| implicit: plain_implicit, |
| quoted_implicit: quoted_implicit, |
| style: yaml_style_t(token.style), |
| } |
| skip_token(parser) |
| return true |
| } |
| if token.typ == yaml_FLOW_SEQUENCE_START_TOKEN { |
| // [Go] Some of the events below can be merged as they differ only on style. |
| end_mark = token.end_mark |
| parser.state = yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_SEQUENCE_START_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| implicit: implicit, |
| style: yaml_style_t(yaml_FLOW_SEQUENCE_STYLE), |
| } |
| return true |
| } |
| if token.typ == yaml_FLOW_MAPPING_START_TOKEN { |
| end_mark = token.end_mark |
| parser.state = yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_MAPPING_START_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| implicit: implicit, |
| style: yaml_style_t(yaml_FLOW_MAPPING_STYLE), |
| } |
| return true |
| } |
| if block && token.typ == yaml_BLOCK_SEQUENCE_START_TOKEN { |
| end_mark = token.end_mark |
| parser.state = yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_SEQUENCE_START_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| implicit: implicit, |
| style: yaml_style_t(yaml_BLOCK_SEQUENCE_STYLE), |
| } |
| return true |
| } |
| if block && token.typ == yaml_BLOCK_MAPPING_START_TOKEN { |
| end_mark = token.end_mark |
| parser.state = yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_MAPPING_START_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| implicit: implicit, |
| style: yaml_style_t(yaml_BLOCK_MAPPING_STYLE), |
| } |
| return true |
| } |
| if len(anchor) > 0 || len(tag) > 0 { |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| |
| *event = yaml_event_t{ |
| typ: yaml_SCALAR_EVENT, |
| start_mark: start_mark, |
| end_mark: end_mark, |
| anchor: anchor, |
| tag: tag, |
| implicit: implicit, |
| quoted_implicit: false, |
| style: yaml_style_t(yaml_PLAIN_SCALAR_STYLE), |
| } |
| return true |
| } |
| |
| context := "while parsing a flow node" |
| if block { |
| context = "while parsing a block node" |
| } |
| yaml_parser_set_parser_error_context(parser, context, start_mark, |
| "did not find expected node content", token.start_mark) |
| return false |
| } |
| |
| // Parse the productions: |
| // block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END |
| // ******************** *********** * ********* |
| // |
| func yaml_parser_parse_block_sequence_entry(parser *yaml_parser_t, event *yaml_event_t, first bool) bool { |
| if first { |
| token := peek_token(parser) |
| parser.marks = append(parser.marks, token.start_mark) |
| skip_token(parser) |
| } |
| |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| if token.typ == yaml_BLOCK_ENTRY_TOKEN { |
| mark := token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_BLOCK_ENTRY_TOKEN && token.typ != yaml_BLOCK_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE) |
| return yaml_parser_parse_node(parser, event, true, false) |
| } else { |
| parser.state = yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE |
| return yaml_parser_process_empty_scalar(parser, event, mark) |
| } |
| } |
| if token.typ == yaml_BLOCK_END_TOKEN { |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| |
| *event = yaml_event_t{ |
| typ: yaml_SEQUENCE_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| } |
| |
| skip_token(parser) |
| return true |
| } |
| |
| context_mark := parser.marks[len(parser.marks)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| return yaml_parser_set_parser_error_context(parser, |
| "while parsing a block collection", context_mark, |
| "did not find expected '-' indicator", token.start_mark) |
| } |
| |
| // Parse the productions: |
| // indentless_sequence ::= (BLOCK-ENTRY block_node?)+ |
| // *********** * |
| func yaml_parser_parse_indentless_sequence_entry(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| if token.typ == yaml_BLOCK_ENTRY_TOKEN { |
| mark := token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_BLOCK_ENTRY_TOKEN && |
| token.typ != yaml_KEY_TOKEN && |
| token.typ != yaml_VALUE_TOKEN && |
| token.typ != yaml_BLOCK_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE) |
| return yaml_parser_parse_node(parser, event, true, false) |
| } |
| parser.state = yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE |
| return yaml_parser_process_empty_scalar(parser, event, mark) |
| } |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| |
| *event = yaml_event_t{ |
| typ: yaml_SEQUENCE_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.start_mark, // [Go] Shouldn't this be token.end_mark? |
| } |
| return true |
| } |
| |
| // Parse the productions: |
| // block_mapping ::= BLOCK-MAPPING_START |
| // ******************* |
| // ((KEY block_node_or_indentless_sequence?)? |
| // *** * |
| // (VALUE block_node_or_indentless_sequence?)?)* |
| // |
| // BLOCK-END |
| // ********* |
| // |
| func yaml_parser_parse_block_mapping_key(parser *yaml_parser_t, event *yaml_event_t, first bool) bool { |
| if first { |
| token := peek_token(parser) |
| parser.marks = append(parser.marks, token.start_mark) |
| skip_token(parser) |
| } |
| |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| if token.typ == yaml_KEY_TOKEN { |
| mark := token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_KEY_TOKEN && |
| token.typ != yaml_VALUE_TOKEN && |
| token.typ != yaml_BLOCK_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_BLOCK_MAPPING_VALUE_STATE) |
| return yaml_parser_parse_node(parser, event, true, true) |
| } else { |
| parser.state = yaml_PARSE_BLOCK_MAPPING_VALUE_STATE |
| return yaml_parser_process_empty_scalar(parser, event, mark) |
| } |
| } else if token.typ == yaml_BLOCK_END_TOKEN { |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| *event = yaml_event_t{ |
| typ: yaml_MAPPING_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| } |
| skip_token(parser) |
| return true |
| } |
| |
| context_mark := parser.marks[len(parser.marks)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| return yaml_parser_set_parser_error_context(parser, |
| "while parsing a block mapping", context_mark, |
| "did not find expected key", token.start_mark) |
| } |
| |
| // Parse the productions: |
| // block_mapping ::= BLOCK-MAPPING_START |
| // |
| // ((KEY block_node_or_indentless_sequence?)? |
| // |
| // (VALUE block_node_or_indentless_sequence?)?)* |
| // ***** * |
| // BLOCK-END |
| // |
| // |
| func yaml_parser_parse_block_mapping_value(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ == yaml_VALUE_TOKEN { |
| mark := token.end_mark |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_KEY_TOKEN && |
| token.typ != yaml_VALUE_TOKEN && |
| token.typ != yaml_BLOCK_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_BLOCK_MAPPING_KEY_STATE) |
| return yaml_parser_parse_node(parser, event, true, true) |
| } |
| parser.state = yaml_PARSE_BLOCK_MAPPING_KEY_STATE |
| return yaml_parser_process_empty_scalar(parser, event, mark) |
| } |
| parser.state = yaml_PARSE_BLOCK_MAPPING_KEY_STATE |
| return yaml_parser_process_empty_scalar(parser, event, token.start_mark) |
| } |
| |
| // Parse the productions: |
| // flow_sequence ::= FLOW-SEQUENCE-START |
| // ******************* |
| // (flow_sequence_entry FLOW-ENTRY)* |
| // * ********** |
| // flow_sequence_entry? |
| // * |
| // FLOW-SEQUENCE-END |
| // ***************** |
| // flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // * |
| // |
| func yaml_parser_parse_flow_sequence_entry(parser *yaml_parser_t, event *yaml_event_t, first bool) bool { |
| if first { |
| token := peek_token(parser) |
| parser.marks = append(parser.marks, token.start_mark) |
| skip_token(parser) |
| } |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_FLOW_SEQUENCE_END_TOKEN { |
| if !first { |
| if token.typ == yaml_FLOW_ENTRY_TOKEN { |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| } else { |
| context_mark := parser.marks[len(parser.marks)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| return yaml_parser_set_parser_error_context(parser, |
| "while parsing a flow sequence", context_mark, |
| "did not find expected ',' or ']'", token.start_mark) |
| } |
| } |
| |
| if token.typ == yaml_KEY_TOKEN { |
| parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_MAPPING_START_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| implicit: true, |
| style: yaml_style_t(yaml_FLOW_MAPPING_STYLE), |
| } |
| skip_token(parser) |
| return true |
| } else if token.typ != yaml_FLOW_SEQUENCE_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE) |
| return yaml_parser_parse_node(parser, event, false, false) |
| } |
| } |
| |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| |
| *event = yaml_event_t{ |
| typ: yaml_SEQUENCE_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| } |
| |
| skip_token(parser) |
| return true |
| } |
| |
| // |
| // Parse the productions: |
| // flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // *** * |
| // |
| func yaml_parser_parse_flow_sequence_entry_mapping_key(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_VALUE_TOKEN && |
| token.typ != yaml_FLOW_ENTRY_TOKEN && |
| token.typ != yaml_FLOW_SEQUENCE_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE) |
| return yaml_parser_parse_node(parser, event, false, false) |
| } |
| mark := token.end_mark |
| skip_token(parser) |
| parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE |
| return yaml_parser_process_empty_scalar(parser, event, mark) |
| } |
| |
| // Parse the productions: |
| // flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // ***** * |
| // |
| func yaml_parser_parse_flow_sequence_entry_mapping_value(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ == yaml_VALUE_TOKEN { |
| skip_token(parser) |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_FLOW_ENTRY_TOKEN && token.typ != yaml_FLOW_SEQUENCE_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE) |
| return yaml_parser_parse_node(parser, event, false, false) |
| } |
| } |
| parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE |
| return yaml_parser_process_empty_scalar(parser, event, token.start_mark) |
| } |
| |
| // Parse the productions: |
| // flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // * |
| // |
| func yaml_parser_parse_flow_sequence_entry_mapping_end(parser *yaml_parser_t, event *yaml_event_t) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE |
| *event = yaml_event_t{ |
| typ: yaml_MAPPING_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.start_mark, // [Go] Shouldn't this be end_mark? |
| } |
| return true |
| } |
| |
| // Parse the productions: |
| // flow_mapping ::= FLOW-MAPPING-START |
| // ****************** |
| // (flow_mapping_entry FLOW-ENTRY)* |
| // * ********** |
| // flow_mapping_entry? |
| // ****************** |
| // FLOW-MAPPING-END |
| // **************** |
| // flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // * *** * |
| // |
| func yaml_parser_parse_flow_mapping_key(parser *yaml_parser_t, event *yaml_event_t, first bool) bool { |
| if first { |
| token := peek_token(parser) |
| parser.marks = append(parser.marks, token.start_mark) |
| skip_token(parser) |
| } |
| |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| if token.typ != yaml_FLOW_MAPPING_END_TOKEN { |
| if !first { |
| if token.typ == yaml_FLOW_ENTRY_TOKEN { |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| } else { |
| context_mark := parser.marks[len(parser.marks)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| return yaml_parser_set_parser_error_context(parser, |
| "while parsing a flow mapping", context_mark, |
| "did not find expected ',' or '}'", token.start_mark) |
| } |
| } |
| |
| if token.typ == yaml_KEY_TOKEN { |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_VALUE_TOKEN && |
| token.typ != yaml_FLOW_ENTRY_TOKEN && |
| token.typ != yaml_FLOW_MAPPING_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_VALUE_STATE) |
| return yaml_parser_parse_node(parser, event, false, false) |
| } else { |
| parser.state = yaml_PARSE_FLOW_MAPPING_VALUE_STATE |
| return yaml_parser_process_empty_scalar(parser, event, token.start_mark) |
| } |
| } else if token.typ != yaml_FLOW_MAPPING_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE) |
| return yaml_parser_parse_node(parser, event, false, false) |
| } |
| } |
| |
| parser.state = parser.states[len(parser.states)-1] |
| parser.states = parser.states[:len(parser.states)-1] |
| parser.marks = parser.marks[:len(parser.marks)-1] |
| *event = yaml_event_t{ |
| typ: yaml_MAPPING_END_EVENT, |
| start_mark: token.start_mark, |
| end_mark: token.end_mark, |
| } |
| skip_token(parser) |
| return true |
| } |
| |
| // Parse the productions: |
| // flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? |
| // * ***** * |
| // |
| func yaml_parser_parse_flow_mapping_value(parser *yaml_parser_t, event *yaml_event_t, empty bool) bool { |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if empty { |
| parser.state = yaml_PARSE_FLOW_MAPPING_KEY_STATE |
| return yaml_parser_process_empty_scalar(parser, event, token.start_mark) |
| } |
| if token.typ == yaml_VALUE_TOKEN { |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| if token.typ != yaml_FLOW_ENTRY_TOKEN && token.typ != yaml_FLOW_MAPPING_END_TOKEN { |
| parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_KEY_STATE) |
| return yaml_parser_parse_node(parser, event, false, false) |
| } |
| } |
| parser.state = yaml_PARSE_FLOW_MAPPING_KEY_STATE |
| return yaml_parser_process_empty_scalar(parser, event, token.start_mark) |
| } |
| |
| // Generate an empty scalar event. |
| func yaml_parser_process_empty_scalar(parser *yaml_parser_t, event *yaml_event_t, mark yaml_mark_t) bool { |
| *event = yaml_event_t{ |
| typ: yaml_SCALAR_EVENT, |
| start_mark: mark, |
| end_mark: mark, |
| value: nil, // Empty |
| implicit: true, |
| style: yaml_style_t(yaml_PLAIN_SCALAR_STYLE), |
| } |
| return true |
| } |
| |
| var default_tag_directives = []yaml_tag_directive_t{ |
| {[]byte("!"), []byte("!")}, |
| {[]byte("!!"), []byte("tag:yaml.org,2002:")}, |
| } |
| |
| // Parse directives. |
| func yaml_parser_process_directives(parser *yaml_parser_t, |
| version_directive_ref **yaml_version_directive_t, |
| tag_directives_ref *[]yaml_tag_directive_t) bool { |
| |
| var version_directive *yaml_version_directive_t |
| var tag_directives []yaml_tag_directive_t |
| |
| token := peek_token(parser) |
| if token == nil { |
| return false |
| } |
| |
| for token.typ == yaml_VERSION_DIRECTIVE_TOKEN || token.typ == yaml_TAG_DIRECTIVE_TOKEN { |
| if token.typ == yaml_VERSION_DIRECTIVE_TOKEN { |
| if version_directive != nil { |
| yaml_parser_set_parser_error(parser, |
| "found duplicate %YAML directive", token.start_mark) |
| return false |
| } |
| if token.major != 1 || token.minor != 1 { |
| yaml_parser_set_parser_error(parser, |
| "found incompatible YAML document", token.start_mark) |
| return false |
| } |
| version_directive = &yaml_version_directive_t{ |
| major: token.major, |
| minor: token.minor, |
| } |
| } else if token.typ == yaml_TAG_DIRECTIVE_TOKEN { |
| value := yaml_tag_directive_t{ |
| handle: token.value, |
| prefix: token.prefix, |
| } |
| if !yaml_parser_append_tag_directive(parser, value, false, token.start_mark) { |
| return false |
| } |
| tag_directives = append(tag_directives, value) |
| } |
| |
| skip_token(parser) |
| token = peek_token(parser) |
| if token == nil { |
| return false |
| } |
| } |
| |
| for i := range default_tag_directives { |
| if !yaml_parser_append_tag_directive(parser, default_tag_directives[i], true, token.start_mark) { |
| return false |
| } |
| } |
| |
| if version_directive_ref != nil { |
| *version_directive_ref = version_directive |
| } |
| if tag_directives_ref != nil { |
| *tag_directives_ref = tag_directives |
| } |
| return true |
| } |
| |
| // Append a tag directive to the directives stack. |
| func yaml_parser_append_tag_directive(parser *yaml_parser_t, value yaml_tag_directive_t, allow_duplicates bool, mark yaml_mark_t) bool { |
| for i := range parser.tag_directives { |
| if bytes.Equal(value.handle, parser.tag_directives[i].handle) { |
| if allow_duplicates { |
| return true |
| } |
| return yaml_parser_set_parser_error(parser, "found duplicate %TAG directive", mark) |
| } |
| } |
| |
| // [Go] I suspect the copy is unnecessary. This was likely done |
| // because there was no way to track ownership of the data. |
| value_copy := yaml_tag_directive_t{ |
| handle: make([]byte, len(value.handle)), |
| prefix: make([]byte, len(value.prefix)), |
| } |
| copy(value_copy.handle, value.handle) |
| copy(value_copy.prefix, value.prefix) |
| parser.tag_directives = append(parser.tag_directives, value_copy) |
| return true |
| } |
