实现基础web服务器
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							| @@ -0,0 +1,807 @@ | ||||
| // | ||||
| // Copyright (c) 2011-2019 Canonical Ltd | ||||
| // Copyright (c) 2006-2010 Kirill Simonov | ||||
| // | ||||
| // Permission is hereby granted, free of charge, to any person obtaining a copy of | ||||
| // this software and associated documentation files (the "Software"), to deal in | ||||
| // the Software without restriction, including without limitation the rights to | ||||
| // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | ||||
| // of the Software, and to permit persons to whom the Software is furnished to do | ||||
| // so, subject to the following conditions: | ||||
| // | ||||
| // The above copyright notice and this permission notice shall be included in all | ||||
| // copies or substantial portions of the Software. | ||||
| // | ||||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||||
| // SOFTWARE. | ||||
|  | ||||
| package yaml | ||||
|  | ||||
| import ( | ||||
| 	"fmt" | ||||
| 	"io" | ||||
| ) | ||||
|  | ||||
| // The version directive data. | ||||
| type yaml_version_directive_t struct { | ||||
| 	major int8 // The major version number. | ||||
| 	minor int8 // The minor version number. | ||||
| } | ||||
|  | ||||
| // The tag directive data. | ||||
| type yaml_tag_directive_t struct { | ||||
| 	handle []byte // The tag handle. | ||||
| 	prefix []byte // The tag prefix. | ||||
| } | ||||
|  | ||||
| type yaml_encoding_t int | ||||
|  | ||||
| // The stream encoding. | ||||
| const ( | ||||
| 	// Let the parser choose the encoding. | ||||
| 	yaml_ANY_ENCODING yaml_encoding_t = iota | ||||
|  | ||||
| 	yaml_UTF8_ENCODING    // The default UTF-8 encoding. | ||||
| 	yaml_UTF16LE_ENCODING // The UTF-16-LE encoding with BOM. | ||||
| 	yaml_UTF16BE_ENCODING // The UTF-16-BE encoding with BOM. | ||||
| ) | ||||
|  | ||||
| type yaml_break_t int | ||||
|  | ||||
| // Line break types. | ||||
| const ( | ||||
| 	// Let the parser choose the break type. | ||||
| 	yaml_ANY_BREAK yaml_break_t = iota | ||||
|  | ||||
| 	yaml_CR_BREAK   // Use CR for line breaks (Mac style). | ||||
| 	yaml_LN_BREAK   // Use LN for line breaks (Unix style). | ||||
| 	yaml_CRLN_BREAK // Use CR LN for line breaks (DOS style). | ||||
| ) | ||||
|  | ||||
| type yaml_error_type_t int | ||||
|  | ||||
| // Many bad things could happen with the parser and emitter. | ||||
| const ( | ||||
| 	// No error is produced. | ||||
| 	yaml_NO_ERROR yaml_error_type_t = iota | ||||
|  | ||||
| 	yaml_MEMORY_ERROR   // Cannot allocate or reallocate a block of memory. | ||||
| 	yaml_READER_ERROR   // Cannot read or decode the input stream. | ||||
| 	yaml_SCANNER_ERROR  // Cannot scan the input stream. | ||||
| 	yaml_PARSER_ERROR   // Cannot parse the input stream. | ||||
| 	yaml_COMPOSER_ERROR // Cannot compose a YAML document. | ||||
| 	yaml_WRITER_ERROR   // Cannot write to the output stream. | ||||
| 	yaml_EMITTER_ERROR  // Cannot emit a YAML stream. | ||||
| ) | ||||
|  | ||||
| // The pointer position. | ||||
| type yaml_mark_t struct { | ||||
| 	index  int // The position index. | ||||
| 	line   int // The position line. | ||||
| 	column int // The position column. | ||||
| } | ||||
|  | ||||
| // Node Styles | ||||
|  | ||||
| type yaml_style_t int8 | ||||
|  | ||||
| type yaml_scalar_style_t yaml_style_t | ||||
|  | ||||
| // Scalar styles. | ||||
| const ( | ||||
| 	// Let the emitter choose the style. | ||||
| 	yaml_ANY_SCALAR_STYLE yaml_scalar_style_t = 0 | ||||
|  | ||||
| 	yaml_PLAIN_SCALAR_STYLE         yaml_scalar_style_t = 1 << iota // The plain scalar style. | ||||
| 	yaml_SINGLE_QUOTED_SCALAR_STYLE                                 // The single-quoted scalar style. | ||||
| 	yaml_DOUBLE_QUOTED_SCALAR_STYLE                                 // The double-quoted scalar style. | ||||
| 	yaml_LITERAL_SCALAR_STYLE                                       // The literal scalar style. | ||||
| 	yaml_FOLDED_SCALAR_STYLE                                        // The folded scalar style. | ||||
| ) | ||||
|  | ||||
| type yaml_sequence_style_t yaml_style_t | ||||
|  | ||||
| // Sequence styles. | ||||
| const ( | ||||
| 	// Let the emitter choose the style. | ||||
| 	yaml_ANY_SEQUENCE_STYLE yaml_sequence_style_t = iota | ||||
|  | ||||
| 	yaml_BLOCK_SEQUENCE_STYLE // The block sequence style. | ||||
| 	yaml_FLOW_SEQUENCE_STYLE  // The flow sequence style. | ||||
| ) | ||||
|  | ||||
| type yaml_mapping_style_t yaml_style_t | ||||
|  | ||||
| // Mapping styles. | ||||
| const ( | ||||
| 	// Let the emitter choose the style. | ||||
| 	yaml_ANY_MAPPING_STYLE yaml_mapping_style_t = iota | ||||
|  | ||||
| 	yaml_BLOCK_MAPPING_STYLE // The block mapping style. | ||||
| 	yaml_FLOW_MAPPING_STYLE  // The flow mapping style. | ||||
| ) | ||||
|  | ||||
| // Tokens | ||||
|  | ||||
| type yaml_token_type_t int | ||||
|  | ||||
| // Token types. | ||||
| const ( | ||||
| 	// An empty token. | ||||
| 	yaml_NO_TOKEN yaml_token_type_t = iota | ||||
|  | ||||
| 	yaml_STREAM_START_TOKEN // A STREAM-START token. | ||||
| 	yaml_STREAM_END_TOKEN   // A STREAM-END token. | ||||
|  | ||||
| 	yaml_VERSION_DIRECTIVE_TOKEN // A VERSION-DIRECTIVE token. | ||||
| 	yaml_TAG_DIRECTIVE_TOKEN     // A TAG-DIRECTIVE token. | ||||
| 	yaml_DOCUMENT_START_TOKEN    // A DOCUMENT-START token. | ||||
| 	yaml_DOCUMENT_END_TOKEN      // A DOCUMENT-END token. | ||||
|  | ||||
| 	yaml_BLOCK_SEQUENCE_START_TOKEN // A BLOCK-SEQUENCE-START token. | ||||
| 	yaml_BLOCK_MAPPING_START_TOKEN  // A BLOCK-SEQUENCE-END token. | ||||
| 	yaml_BLOCK_END_TOKEN            // A BLOCK-END token. | ||||
|  | ||||
| 	yaml_FLOW_SEQUENCE_START_TOKEN // A FLOW-SEQUENCE-START token. | ||||
| 	yaml_FLOW_SEQUENCE_END_TOKEN   // A FLOW-SEQUENCE-END token. | ||||
| 	yaml_FLOW_MAPPING_START_TOKEN  // A FLOW-MAPPING-START token. | ||||
| 	yaml_FLOW_MAPPING_END_TOKEN    // A FLOW-MAPPING-END token. | ||||
|  | ||||
| 	yaml_BLOCK_ENTRY_TOKEN // A BLOCK-ENTRY token. | ||||
| 	yaml_FLOW_ENTRY_TOKEN  // A FLOW-ENTRY token. | ||||
| 	yaml_KEY_TOKEN         // A KEY token. | ||||
| 	yaml_VALUE_TOKEN       // A VALUE token. | ||||
|  | ||||
| 	yaml_ALIAS_TOKEN  // An ALIAS token. | ||||
| 	yaml_ANCHOR_TOKEN // An ANCHOR token. | ||||
| 	yaml_TAG_TOKEN    // A TAG token. | ||||
| 	yaml_SCALAR_TOKEN // A SCALAR token. | ||||
| ) | ||||
|  | ||||
| func (tt yaml_token_type_t) String() string { | ||||
| 	switch tt { | ||||
| 	case yaml_NO_TOKEN: | ||||
| 		return "yaml_NO_TOKEN" | ||||
| 	case yaml_STREAM_START_TOKEN: | ||||
| 		return "yaml_STREAM_START_TOKEN" | ||||
| 	case yaml_STREAM_END_TOKEN: | ||||
| 		return "yaml_STREAM_END_TOKEN" | ||||
| 	case yaml_VERSION_DIRECTIVE_TOKEN: | ||||
| 		return "yaml_VERSION_DIRECTIVE_TOKEN" | ||||
| 	case yaml_TAG_DIRECTIVE_TOKEN: | ||||
| 		return "yaml_TAG_DIRECTIVE_TOKEN" | ||||
| 	case yaml_DOCUMENT_START_TOKEN: | ||||
| 		return "yaml_DOCUMENT_START_TOKEN" | ||||
| 	case yaml_DOCUMENT_END_TOKEN: | ||||
| 		return "yaml_DOCUMENT_END_TOKEN" | ||||
| 	case yaml_BLOCK_SEQUENCE_START_TOKEN: | ||||
| 		return "yaml_BLOCK_SEQUENCE_START_TOKEN" | ||||
| 	case yaml_BLOCK_MAPPING_START_TOKEN: | ||||
| 		return "yaml_BLOCK_MAPPING_START_TOKEN" | ||||
| 	case yaml_BLOCK_END_TOKEN: | ||||
| 		return "yaml_BLOCK_END_TOKEN" | ||||
| 	case yaml_FLOW_SEQUENCE_START_TOKEN: | ||||
| 		return "yaml_FLOW_SEQUENCE_START_TOKEN" | ||||
| 	case yaml_FLOW_SEQUENCE_END_TOKEN: | ||||
| 		return "yaml_FLOW_SEQUENCE_END_TOKEN" | ||||
| 	case yaml_FLOW_MAPPING_START_TOKEN: | ||||
| 		return "yaml_FLOW_MAPPING_START_TOKEN" | ||||
| 	case yaml_FLOW_MAPPING_END_TOKEN: | ||||
| 		return "yaml_FLOW_MAPPING_END_TOKEN" | ||||
| 	case yaml_BLOCK_ENTRY_TOKEN: | ||||
| 		return "yaml_BLOCK_ENTRY_TOKEN" | ||||
| 	case yaml_FLOW_ENTRY_TOKEN: | ||||
| 		return "yaml_FLOW_ENTRY_TOKEN" | ||||
| 	case yaml_KEY_TOKEN: | ||||
| 		return "yaml_KEY_TOKEN" | ||||
| 	case yaml_VALUE_TOKEN: | ||||
| 		return "yaml_VALUE_TOKEN" | ||||
| 	case yaml_ALIAS_TOKEN: | ||||
| 		return "yaml_ALIAS_TOKEN" | ||||
| 	case yaml_ANCHOR_TOKEN: | ||||
| 		return "yaml_ANCHOR_TOKEN" | ||||
| 	case yaml_TAG_TOKEN: | ||||
| 		return "yaml_TAG_TOKEN" | ||||
| 	case yaml_SCALAR_TOKEN: | ||||
| 		return "yaml_SCALAR_TOKEN" | ||||
| 	} | ||||
| 	return "<unknown token>" | ||||
| } | ||||
|  | ||||
| // The token structure. | ||||
| type yaml_token_t struct { | ||||
| 	// The token type. | ||||
| 	typ yaml_token_type_t | ||||
|  | ||||
| 	// The start/end of the token. | ||||
| 	start_mark, end_mark yaml_mark_t | ||||
|  | ||||
| 	// The stream encoding (for yaml_STREAM_START_TOKEN). | ||||
| 	encoding yaml_encoding_t | ||||
|  | ||||
| 	// The alias/anchor/scalar value or tag/tag directive handle | ||||
| 	// (for yaml_ALIAS_TOKEN, yaml_ANCHOR_TOKEN, yaml_SCALAR_TOKEN, yaml_TAG_TOKEN, yaml_TAG_DIRECTIVE_TOKEN). | ||||
| 	value []byte | ||||
|  | ||||
| 	// The tag suffix (for yaml_TAG_TOKEN). | ||||
| 	suffix []byte | ||||
|  | ||||
| 	// The tag directive prefix (for yaml_TAG_DIRECTIVE_TOKEN). | ||||
| 	prefix []byte | ||||
|  | ||||
| 	// The scalar style (for yaml_SCALAR_TOKEN). | ||||
| 	style yaml_scalar_style_t | ||||
|  | ||||
| 	// The version directive major/minor (for yaml_VERSION_DIRECTIVE_TOKEN). | ||||
| 	major, minor int8 | ||||
| } | ||||
|  | ||||
| // Events | ||||
|  | ||||
| type yaml_event_type_t int8 | ||||
|  | ||||
| // Event types. | ||||
| const ( | ||||
| 	// An empty event. | ||||
| 	yaml_NO_EVENT yaml_event_type_t = iota | ||||
|  | ||||
| 	yaml_STREAM_START_EVENT   // A STREAM-START event. | ||||
| 	yaml_STREAM_END_EVENT     // A STREAM-END event. | ||||
| 	yaml_DOCUMENT_START_EVENT // A DOCUMENT-START event. | ||||
| 	yaml_DOCUMENT_END_EVENT   // A DOCUMENT-END event. | ||||
| 	yaml_ALIAS_EVENT          // An ALIAS event. | ||||
| 	yaml_SCALAR_EVENT         // A SCALAR event. | ||||
| 	yaml_SEQUENCE_START_EVENT // A SEQUENCE-START event. | ||||
| 	yaml_SEQUENCE_END_EVENT   // A SEQUENCE-END event. | ||||
| 	yaml_MAPPING_START_EVENT  // A MAPPING-START event. | ||||
| 	yaml_MAPPING_END_EVENT    // A MAPPING-END event. | ||||
| 	yaml_TAIL_COMMENT_EVENT | ||||
| ) | ||||
|  | ||||
| var eventStrings = []string{ | ||||
| 	yaml_NO_EVENT:             "none", | ||||
| 	yaml_STREAM_START_EVENT:   "stream start", | ||||
| 	yaml_STREAM_END_EVENT:     "stream end", | ||||
| 	yaml_DOCUMENT_START_EVENT: "document start", | ||||
| 	yaml_DOCUMENT_END_EVENT:   "document end", | ||||
| 	yaml_ALIAS_EVENT:          "alias", | ||||
| 	yaml_SCALAR_EVENT:         "scalar", | ||||
| 	yaml_SEQUENCE_START_EVENT: "sequence start", | ||||
| 	yaml_SEQUENCE_END_EVENT:   "sequence end", | ||||
| 	yaml_MAPPING_START_EVENT:  "mapping start", | ||||
| 	yaml_MAPPING_END_EVENT:    "mapping end", | ||||
| 	yaml_TAIL_COMMENT_EVENT:   "tail comment", | ||||
| } | ||||
|  | ||||
| func (e yaml_event_type_t) String() string { | ||||
| 	if e < 0 || int(e) >= len(eventStrings) { | ||||
| 		return fmt.Sprintf("unknown event %d", e) | ||||
| 	} | ||||
| 	return eventStrings[e] | ||||
| } | ||||
|  | ||||
| // The event structure. | ||||
| type yaml_event_t struct { | ||||
|  | ||||
| 	// The event type. | ||||
| 	typ yaml_event_type_t | ||||
|  | ||||
| 	// The start and end of the event. | ||||
| 	start_mark, end_mark yaml_mark_t | ||||
|  | ||||
| 	// The document encoding (for yaml_STREAM_START_EVENT). | ||||
| 	encoding yaml_encoding_t | ||||
|  | ||||
| 	// The version directive (for yaml_DOCUMENT_START_EVENT). | ||||
| 	version_directive *yaml_version_directive_t | ||||
|  | ||||
| 	// The list of tag directives (for yaml_DOCUMENT_START_EVENT). | ||||
| 	tag_directives []yaml_tag_directive_t | ||||
|  | ||||
| 	// The comments | ||||
| 	head_comment []byte | ||||
| 	line_comment []byte | ||||
| 	foot_comment []byte | ||||
| 	tail_comment []byte | ||||
|  | ||||
| 	// The anchor (for yaml_SCALAR_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT, yaml_ALIAS_EVENT). | ||||
| 	anchor []byte | ||||
|  | ||||
| 	// The tag (for yaml_SCALAR_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT). | ||||
| 	tag []byte | ||||
|  | ||||
| 	// The scalar value (for yaml_SCALAR_EVENT). | ||||
| 	value []byte | ||||
|  | ||||
| 	// Is the document start/end indicator implicit, or the tag optional? | ||||
| 	// (for yaml_DOCUMENT_START_EVENT, yaml_DOCUMENT_END_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT, yaml_SCALAR_EVENT). | ||||
| 	implicit bool | ||||
|  | ||||
| 	// Is the tag optional for any non-plain style? (for yaml_SCALAR_EVENT). | ||||
| 	quoted_implicit bool | ||||
|  | ||||
| 	// The style (for yaml_SCALAR_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT). | ||||
| 	style yaml_style_t | ||||
| } | ||||
|  | ||||
| func (e *yaml_event_t) scalar_style() yaml_scalar_style_t     { return yaml_scalar_style_t(e.style) } | ||||
| func (e *yaml_event_t) sequence_style() yaml_sequence_style_t { return yaml_sequence_style_t(e.style) } | ||||
| func (e *yaml_event_t) mapping_style() yaml_mapping_style_t   { return yaml_mapping_style_t(e.style) } | ||||
|  | ||||
| // Nodes | ||||
|  | ||||
| const ( | ||||
| 	yaml_NULL_TAG      = "tag:yaml.org,2002:null"      // The tag !!null with the only possible value: null. | ||||
| 	yaml_BOOL_TAG      = "tag:yaml.org,2002:bool"      // The tag !!bool with the values: true and false. | ||||
| 	yaml_STR_TAG       = "tag:yaml.org,2002:str"       // The tag !!str for string values. | ||||
| 	yaml_INT_TAG       = "tag:yaml.org,2002:int"       // The tag !!int for integer values. | ||||
| 	yaml_FLOAT_TAG     = "tag:yaml.org,2002:float"     // The tag !!float for float values. | ||||
| 	yaml_TIMESTAMP_TAG = "tag:yaml.org,2002:timestamp" // The tag !!timestamp for date and time values. | ||||
|  | ||||
| 	yaml_SEQ_TAG = "tag:yaml.org,2002:seq" // The tag !!seq is used to denote sequences. | ||||
| 	yaml_MAP_TAG = "tag:yaml.org,2002:map" // The tag !!map is used to denote mapping. | ||||
|  | ||||
| 	// Not in original libyaml. | ||||
| 	yaml_BINARY_TAG = "tag:yaml.org,2002:binary" | ||||
| 	yaml_MERGE_TAG  = "tag:yaml.org,2002:merge" | ||||
|  | ||||
| 	yaml_DEFAULT_SCALAR_TAG   = yaml_STR_TAG // The default scalar tag is !!str. | ||||
| 	yaml_DEFAULT_SEQUENCE_TAG = yaml_SEQ_TAG // The default sequence tag is !!seq. | ||||
| 	yaml_DEFAULT_MAPPING_TAG  = yaml_MAP_TAG // The default mapping tag is !!map. | ||||
| ) | ||||
|  | ||||
| type yaml_node_type_t int | ||||
|  | ||||
| // Node types. | ||||
| const ( | ||||
| 	// An empty node. | ||||
| 	yaml_NO_NODE yaml_node_type_t = iota | ||||
|  | ||||
| 	yaml_SCALAR_NODE   // A scalar node. | ||||
| 	yaml_SEQUENCE_NODE // A sequence node. | ||||
| 	yaml_MAPPING_NODE  // A mapping node. | ||||
| ) | ||||
|  | ||||
| // An element of a sequence node. | ||||
| type yaml_node_item_t int | ||||
|  | ||||
| // An element of a mapping node. | ||||
| type yaml_node_pair_t struct { | ||||
| 	key   int // The key of the element. | ||||
| 	value int // The value of the element. | ||||
| } | ||||
|  | ||||
| // The node structure. | ||||
| type yaml_node_t struct { | ||||
| 	typ yaml_node_type_t // The node type. | ||||
| 	tag []byte           // The node tag. | ||||
|  | ||||
| 	// The node data. | ||||
|  | ||||
| 	// The scalar parameters (for yaml_SCALAR_NODE). | ||||
| 	scalar struct { | ||||
| 		value  []byte              // The scalar value. | ||||
| 		length int                 // The length of the scalar value. | ||||
| 		style  yaml_scalar_style_t // The scalar style. | ||||
| 	} | ||||
|  | ||||
| 	// The sequence parameters (for YAML_SEQUENCE_NODE). | ||||
| 	sequence struct { | ||||
| 		items_data []yaml_node_item_t    // The stack of sequence items. | ||||
| 		style      yaml_sequence_style_t // The sequence style. | ||||
| 	} | ||||
|  | ||||
| 	// The mapping parameters (for yaml_MAPPING_NODE). | ||||
| 	mapping struct { | ||||
| 		pairs_data  []yaml_node_pair_t   // The stack of mapping pairs (key, value). | ||||
| 		pairs_start *yaml_node_pair_t    // The beginning of the stack. | ||||
| 		pairs_end   *yaml_node_pair_t    // The end of the stack. | ||||
| 		pairs_top   *yaml_node_pair_t    // The top of the stack. | ||||
| 		style       yaml_mapping_style_t // The mapping style. | ||||
| 	} | ||||
|  | ||||
| 	start_mark yaml_mark_t // The beginning of the node. | ||||
| 	end_mark   yaml_mark_t // The end of the node. | ||||
|  | ||||
| } | ||||
|  | ||||
| // The document structure. | ||||
| type yaml_document_t struct { | ||||
|  | ||||
| 	// The document nodes. | ||||
| 	nodes []yaml_node_t | ||||
|  | ||||
| 	// The version directive. | ||||
| 	version_directive *yaml_version_directive_t | ||||
|  | ||||
| 	// The list of tag directives. | ||||
| 	tag_directives_data  []yaml_tag_directive_t | ||||
| 	tag_directives_start int // The beginning of the tag directives list. | ||||
| 	tag_directives_end   int // The end of the tag directives list. | ||||
|  | ||||
| 	start_implicit int // Is the document start indicator implicit? | ||||
| 	end_implicit   int // Is the document end indicator implicit? | ||||
|  | ||||
| 	// The start/end of the document. | ||||
| 	start_mark, end_mark yaml_mark_t | ||||
| } | ||||
|  | ||||
| // The prototype of a read handler. | ||||
| // | ||||
| // The read handler is called when the parser needs to read more bytes from the | ||||
| // source. The handler should write not more than size bytes to the buffer. | ||||
| // The number of written bytes should be set to the size_read variable. | ||||
| // | ||||
| // [in,out]   data        A pointer to an application data specified by | ||||
| //                        yaml_parser_set_input(). | ||||
| // [out]      buffer      The buffer to write the data from the source. | ||||
| // [in]       size        The size of the buffer. | ||||
| // [out]      size_read   The actual number of bytes read from the source. | ||||
| // | ||||
| // On success, the handler should return 1.  If the handler failed, | ||||
| // the returned value should be 0. On EOF, the handler should set the | ||||
| // size_read to 0 and return 1. | ||||
| type yaml_read_handler_t func(parser *yaml_parser_t, buffer []byte) (n int, err error) | ||||
|  | ||||
| // This structure holds information about a potential simple key. | ||||
| type yaml_simple_key_t struct { | ||||
| 	possible     bool        // Is a simple key possible? | ||||
| 	required     bool        // Is a simple key required? | ||||
| 	token_number int         // The number of the token. | ||||
| 	mark         yaml_mark_t // The position mark. | ||||
| } | ||||
|  | ||||
| // The states of the parser. | ||||
| type yaml_parser_state_t int | ||||
|  | ||||
| const ( | ||||
| 	yaml_PARSE_STREAM_START_STATE yaml_parser_state_t = iota | ||||
|  | ||||
| 	yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE           // Expect the beginning of an implicit document. | ||||
| 	yaml_PARSE_DOCUMENT_START_STATE                    // Expect DOCUMENT-START. | ||||
| 	yaml_PARSE_DOCUMENT_CONTENT_STATE                  // Expect the content of a document. | ||||
| 	yaml_PARSE_DOCUMENT_END_STATE                      // Expect DOCUMENT-END. | ||||
| 	yaml_PARSE_BLOCK_NODE_STATE                        // Expect a block node. | ||||
| 	yaml_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE // Expect a block node or indentless sequence. | ||||
| 	yaml_PARSE_FLOW_NODE_STATE                         // Expect a flow node. | ||||
| 	yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE        // Expect the first entry of a block sequence. | ||||
| 	yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE              // Expect an entry of a block sequence. | ||||
| 	yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE         // Expect an entry of an indentless sequence. | ||||
| 	yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE           // Expect the first key of a block mapping. | ||||
| 	yaml_PARSE_BLOCK_MAPPING_KEY_STATE                 // Expect a block mapping key. | ||||
| 	yaml_PARSE_BLOCK_MAPPING_VALUE_STATE               // Expect a block mapping value. | ||||
| 	yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE         // Expect the first entry of a flow sequence. | ||||
| 	yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE               // Expect an entry of a flow sequence. | ||||
| 	yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE   // Expect a key of an ordered mapping. | ||||
| 	yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE // Expect a value of an ordered mapping. | ||||
| 	yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE   // Expect the and of an ordered mapping entry. | ||||
| 	yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE            // Expect the first key of a flow mapping. | ||||
| 	yaml_PARSE_FLOW_MAPPING_KEY_STATE                  // Expect a key of a flow mapping. | ||||
| 	yaml_PARSE_FLOW_MAPPING_VALUE_STATE                // Expect a value of a flow mapping. | ||||
| 	yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE          // Expect an empty value of a flow mapping. | ||||
| 	yaml_PARSE_END_STATE                               // Expect nothing. | ||||
| ) | ||||
|  | ||||
| func (ps yaml_parser_state_t) String() string { | ||||
| 	switch ps { | ||||
| 	case yaml_PARSE_STREAM_START_STATE: | ||||
| 		return "yaml_PARSE_STREAM_START_STATE" | ||||
| 	case yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE: | ||||
| 		return "yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE" | ||||
| 	case yaml_PARSE_DOCUMENT_START_STATE: | ||||
| 		return "yaml_PARSE_DOCUMENT_START_STATE" | ||||
| 	case yaml_PARSE_DOCUMENT_CONTENT_STATE: | ||||
| 		return "yaml_PARSE_DOCUMENT_CONTENT_STATE" | ||||
| 	case yaml_PARSE_DOCUMENT_END_STATE: | ||||
| 		return "yaml_PARSE_DOCUMENT_END_STATE" | ||||
| 	case yaml_PARSE_BLOCK_NODE_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_NODE_STATE" | ||||
| 	case yaml_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE" | ||||
| 	case yaml_PARSE_FLOW_NODE_STATE: | ||||
| 		return "yaml_PARSE_FLOW_NODE_STATE" | ||||
| 	case yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE" | ||||
| 	case yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE" | ||||
| 	case yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE: | ||||
| 		return "yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE" | ||||
| 	case yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE" | ||||
| 	case yaml_PARSE_BLOCK_MAPPING_KEY_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_MAPPING_KEY_STATE" | ||||
| 	case yaml_PARSE_BLOCK_MAPPING_VALUE_STATE: | ||||
| 		return "yaml_PARSE_BLOCK_MAPPING_VALUE_STATE" | ||||
| 	case yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE: | ||||
| 		return "yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE" | ||||
| 	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE: | ||||
| 		return "yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE" | ||||
| 	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE: | ||||
| 		return "yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE" | ||||
| 	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE: | ||||
| 		return "yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE" | ||||
| 	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE: | ||||
| 		return "yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE" | ||||
| 	case yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE: | ||||
| 		return "yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE" | ||||
| 	case yaml_PARSE_FLOW_MAPPING_KEY_STATE: | ||||
| 		return "yaml_PARSE_FLOW_MAPPING_KEY_STATE" | ||||
| 	case yaml_PARSE_FLOW_MAPPING_VALUE_STATE: | ||||
| 		return "yaml_PARSE_FLOW_MAPPING_VALUE_STATE" | ||||
| 	case yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE: | ||||
| 		return "yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE" | ||||
| 	case yaml_PARSE_END_STATE: | ||||
| 		return "yaml_PARSE_END_STATE" | ||||
| 	} | ||||
| 	return "<unknown parser state>" | ||||
| } | ||||
|  | ||||
| // This structure holds aliases data. | ||||
| type yaml_alias_data_t struct { | ||||
| 	anchor []byte      // The anchor. | ||||
| 	index  int         // The node id. | ||||
| 	mark   yaml_mark_t // The anchor mark. | ||||
| } | ||||
|  | ||||
| // The parser structure. | ||||
| // | ||||
| // All members are internal. Manage the structure using the | ||||
| // yaml_parser_ family of functions. | ||||
| type yaml_parser_t struct { | ||||
|  | ||||
| 	// Error handling | ||||
|  | ||||
| 	error yaml_error_type_t // Error type. | ||||
|  | ||||
| 	problem string // Error description. | ||||
|  | ||||
| 	// The byte about which the problem occurred. | ||||
| 	problem_offset int | ||||
| 	problem_value  int | ||||
| 	problem_mark   yaml_mark_t | ||||
|  | ||||
| 	// The error context. | ||||
| 	context      string | ||||
| 	context_mark yaml_mark_t | ||||
|  | ||||
| 	// Reader stuff | ||||
|  | ||||
| 	read_handler yaml_read_handler_t // Read handler. | ||||
|  | ||||
| 	input_reader io.Reader // File input data. | ||||
| 	input        []byte    // String input data. | ||||
| 	input_pos    int | ||||
|  | ||||
| 	eof bool // EOF flag | ||||
|  | ||||
| 	buffer     []byte // The working buffer. | ||||
| 	buffer_pos int    // The current position of the buffer. | ||||
|  | ||||
| 	unread int // The number of unread characters in the buffer. | ||||
|  | ||||
| 	newlines int // The number of line breaks since last non-break/non-blank character | ||||
|  | ||||
| 	raw_buffer     []byte // The raw buffer. | ||||
| 	raw_buffer_pos int    // The current position of the buffer. | ||||
|  | ||||
| 	encoding yaml_encoding_t // The input encoding. | ||||
|  | ||||
| 	offset int         // The offset of the current position (in bytes). | ||||
| 	mark   yaml_mark_t // The mark of the current position. | ||||
|  | ||||
| 	// Comments | ||||
|  | ||||
| 	head_comment []byte // The current head comments | ||||
| 	line_comment []byte // The current line comments | ||||
| 	foot_comment []byte // The current foot comments | ||||
| 	tail_comment []byte // Foot comment that happens at the end of a block. | ||||
| 	stem_comment []byte // Comment in item preceding a nested structure (list inside list item, etc) | ||||
|  | ||||
| 	comments      []yaml_comment_t // The folded comments for all parsed tokens | ||||
| 	comments_head int | ||||
|  | ||||
| 	// Scanner stuff | ||||
|  | ||||
| 	stream_start_produced bool // Have we started to scan the input stream? | ||||
| 	stream_end_produced   bool // Have we reached the end of the input stream? | ||||
|  | ||||
| 	flow_level int // The number of unclosed '[' and '{' indicators. | ||||
|  | ||||
| 	tokens          []yaml_token_t // The tokens queue. | ||||
| 	tokens_head     int            // The head of the tokens queue. | ||||
| 	tokens_parsed   int            // The number of tokens fetched from the queue. | ||||
| 	token_available bool           // Does the tokens queue contain a token ready for dequeueing. | ||||
|  | ||||
| 	indent  int   // The current indentation level. | ||||
| 	indents []int // The indentation levels stack. | ||||
|  | ||||
| 	simple_key_allowed bool                // May a simple key occur at the current position? | ||||
| 	simple_keys        []yaml_simple_key_t // The stack of simple keys. | ||||
| 	simple_keys_by_tok map[int]int         // possible simple_key indexes indexed by token_number | ||||
|  | ||||
| 	// Parser stuff | ||||
|  | ||||
| 	state          yaml_parser_state_t    // The current parser state. | ||||
| 	states         []yaml_parser_state_t  // The parser states stack. | ||||
| 	marks          []yaml_mark_t          // The stack of marks. | ||||
| 	tag_directives []yaml_tag_directive_t // The list of TAG directives. | ||||
|  | ||||
| 	// Dumper stuff | ||||
|  | ||||
| 	aliases []yaml_alias_data_t // The alias data. | ||||
|  | ||||
| 	document *yaml_document_t // The currently parsed document. | ||||
| } | ||||
|  | ||||
| type yaml_comment_t struct { | ||||
|  | ||||
| 	scan_mark  yaml_mark_t // Position where scanning for comments started | ||||
| 	token_mark yaml_mark_t // Position after which tokens will be associated with this comment | ||||
| 	start_mark yaml_mark_t // Position of '#' comment mark | ||||
| 	end_mark   yaml_mark_t // Position where comment terminated | ||||
|  | ||||
| 	head []byte | ||||
| 	line []byte | ||||
| 	foot []byte | ||||
| } | ||||
|  | ||||
| // Emitter Definitions | ||||
|  | ||||
| // The prototype of a write handler. | ||||
| // | ||||
| // The write handler is called when the emitter needs to flush the accumulated | ||||
| // characters to the output.  The handler should write @a size bytes of the | ||||
| // @a buffer to the output. | ||||
| // | ||||
| // @param[in,out]   data        A pointer to an application data specified by | ||||
| //                              yaml_emitter_set_output(). | ||||
| // @param[in]       buffer      The buffer with bytes to be written. | ||||
| // @param[in]       size        The size of the buffer. | ||||
| // | ||||
| // @returns On success, the handler should return @c 1.  If the handler failed, | ||||
| // the returned value should be @c 0. | ||||
| // | ||||
| type yaml_write_handler_t func(emitter *yaml_emitter_t, buffer []byte) error | ||||
|  | ||||
| type yaml_emitter_state_t int | ||||
|  | ||||
| // The emitter states. | ||||
| const ( | ||||
| 	// Expect STREAM-START. | ||||
| 	yaml_EMIT_STREAM_START_STATE yaml_emitter_state_t = iota | ||||
|  | ||||
| 	yaml_EMIT_FIRST_DOCUMENT_START_STATE       // Expect the first DOCUMENT-START or STREAM-END. | ||||
| 	yaml_EMIT_DOCUMENT_START_STATE             // Expect DOCUMENT-START or STREAM-END. | ||||
| 	yaml_EMIT_DOCUMENT_CONTENT_STATE           // Expect the content of a document. | ||||
| 	yaml_EMIT_DOCUMENT_END_STATE               // Expect DOCUMENT-END. | ||||
| 	yaml_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE   // Expect the first item of a flow sequence. | ||||
| 	yaml_EMIT_FLOW_SEQUENCE_TRAIL_ITEM_STATE   // Expect the next item of a flow sequence, with the comma already written out | ||||
| 	yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE         // Expect an item of a flow sequence. | ||||
| 	yaml_EMIT_FLOW_MAPPING_FIRST_KEY_STATE     // Expect the first key of a flow mapping. | ||||
| 	yaml_EMIT_FLOW_MAPPING_TRAIL_KEY_STATE     // Expect the next key of a flow mapping, with the comma already written out | ||||
| 	yaml_EMIT_FLOW_MAPPING_KEY_STATE           // Expect a key of a flow mapping. | ||||
| 	yaml_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE  // Expect a value for a simple key of a flow mapping. | ||||
| 	yaml_EMIT_FLOW_MAPPING_VALUE_STATE         // Expect a value of a flow mapping. | ||||
| 	yaml_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE  // Expect the first item of a block sequence. | ||||
| 	yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE        // Expect an item of a block sequence. | ||||
| 	yaml_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE    // Expect the first key of a block mapping. | ||||
| 	yaml_EMIT_BLOCK_MAPPING_KEY_STATE          // Expect the key of a block mapping. | ||||
| 	yaml_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE // Expect a value for a simple key of a block mapping. | ||||
| 	yaml_EMIT_BLOCK_MAPPING_VALUE_STATE        // Expect a value of a block mapping. | ||||
| 	yaml_EMIT_END_STATE                        // Expect nothing. | ||||
| ) | ||||
|  | ||||
| // The emitter structure. | ||||
| // | ||||
| // All members are internal.  Manage the structure using the @c yaml_emitter_ | ||||
| // family of functions. | ||||
| type yaml_emitter_t struct { | ||||
|  | ||||
| 	// Error handling | ||||
|  | ||||
| 	error   yaml_error_type_t // Error type. | ||||
| 	problem string            // Error description. | ||||
|  | ||||
| 	// Writer stuff | ||||
|  | ||||
| 	write_handler yaml_write_handler_t // Write handler. | ||||
|  | ||||
| 	output_buffer *[]byte   // String output data. | ||||
| 	output_writer io.Writer // File output data. | ||||
|  | ||||
| 	buffer     []byte // The working buffer. | ||||
| 	buffer_pos int    // The current position of the buffer. | ||||
|  | ||||
| 	raw_buffer     []byte // The raw buffer. | ||||
| 	raw_buffer_pos int    // The current position of the buffer. | ||||
|  | ||||
| 	encoding yaml_encoding_t // The stream encoding. | ||||
|  | ||||
| 	// Emitter stuff | ||||
|  | ||||
| 	canonical   bool         // If the output is in the canonical style? | ||||
| 	best_indent int          // The number of indentation spaces. | ||||
| 	best_width  int          // The preferred width of the output lines. | ||||
| 	unicode     bool         // Allow unescaped non-ASCII characters? | ||||
| 	line_break  yaml_break_t // The preferred line break. | ||||
|  | ||||
| 	state  yaml_emitter_state_t   // The current emitter state. | ||||
| 	states []yaml_emitter_state_t // The stack of states. | ||||
|  | ||||
| 	events      []yaml_event_t // The event queue. | ||||
| 	events_head int            // The head of the event queue. | ||||
|  | ||||
| 	indents []int // The stack of indentation levels. | ||||
|  | ||||
| 	tag_directives []yaml_tag_directive_t // The list of tag directives. | ||||
|  | ||||
| 	indent int // The current indentation level. | ||||
|  | ||||
| 	flow_level int // The current flow level. | ||||
|  | ||||
| 	root_context       bool // Is it the document root context? | ||||
| 	sequence_context   bool // Is it a sequence context? | ||||
| 	mapping_context    bool // Is it a mapping context? | ||||
| 	simple_key_context bool // Is it a simple mapping key context? | ||||
|  | ||||
| 	line       int  // The current line. | ||||
| 	column     int  // The current column. | ||||
| 	whitespace bool // If the last character was a whitespace? | ||||
| 	indention  bool // If the last character was an indentation character (' ', '-', '?', ':')? | ||||
| 	open_ended bool // If an explicit document end is required? | ||||
|  | ||||
| 	space_above bool // Is there's an empty line above? | ||||
| 	foot_indent int  // The indent used to write the foot comment above, or -1 if none. | ||||
|  | ||||
| 	// Anchor analysis. | ||||
| 	anchor_data struct { | ||||
| 		anchor []byte // The anchor value. | ||||
| 		alias  bool   // Is it an alias? | ||||
| 	} | ||||
|  | ||||
| 	// Tag analysis. | ||||
| 	tag_data struct { | ||||
| 		handle []byte // The tag handle. | ||||
| 		suffix []byte // The tag suffix. | ||||
| 	} | ||||
|  | ||||
| 	// Scalar analysis. | ||||
| 	scalar_data struct { | ||||
| 		value                 []byte              // The scalar value. | ||||
| 		multiline             bool                // Does the scalar contain line breaks? | ||||
| 		flow_plain_allowed    bool                // Can the scalar be expessed in the flow plain style? | ||||
| 		block_plain_allowed   bool                // Can the scalar be expressed in the block plain style? | ||||
| 		single_quoted_allowed bool                // Can the scalar be expressed in the single quoted style? | ||||
| 		block_allowed         bool                // Can the scalar be expressed in the literal or folded styles? | ||||
| 		style                 yaml_scalar_style_t // The output style. | ||||
| 	} | ||||
|  | ||||
| 	// Comments | ||||
| 	head_comment []byte | ||||
| 	line_comment []byte | ||||
| 	foot_comment []byte | ||||
| 	tail_comment []byte | ||||
|  | ||||
| 	key_line_comment []byte | ||||
|  | ||||
| 	// Dumper stuff | ||||
|  | ||||
| 	opened bool // If the stream was already opened? | ||||
| 	closed bool // If the stream was already closed? | ||||
|  | ||||
| 	// The information associated with the document nodes. | ||||
| 	anchors *struct { | ||||
| 		references int  // The number of references. | ||||
| 		anchor     int  // The anchor id. | ||||
| 		serialized bool // If the node has been emitted? | ||||
| 	} | ||||
|  | ||||
| 	last_anchor_id int // The last assigned anchor id. | ||||
|  | ||||
| 	document *yaml_document_t // The currently emitted document. | ||||
| } | ||||
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