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/** * @file yaml.h * @brief Public interface for libyaml. * * Include the header file with the code: * @code * #include <yaml.h> * @endcode */ #ifndef YAML_H #define YAML_H #ifdef __cplusplus extern "C" { #endif #include <stdlib.h> #include <stdio.h> #include <string.h> /** * @defgroup export Export Definitions * @{ */ /** The public API declaration. */ #if defined(__MINGW32__) # define YAML_DECLARE(type) type #elif defined(_WIN32) # if defined(YAML_DECLARE_STATIC) # define YAML_DECLARE(type) type # elif defined(YAML_DECLARE_EXPORT) # define YAML_DECLARE(type) __declspec(dllexport) type # else # define YAML_DECLARE(type) __declspec(dllimport) type # endif #else # define YAML_DECLARE(type) type #endif /** @} */ /** * @defgroup version Version Information * @{ */ /** * Get the library version as a string. * * @returns The function returns the pointer to a static string of the form * @c "X.Y.Z", where @c X is the major version number, @c Y is a minor version * number, and @c Z is the patch version number. */ YAML_DECLARE(const char *) yaml_get_version_string(void); /** * Get the library version numbers. * * @param[out] major Major version number. * @param[out] minor Minor version number. * @param[out] patch Patch version number. */ YAML_DECLARE(void) yaml_get_version(int *major, int *minor, int *patch); /** @} */ /** * @defgroup basic Basic Types * @{ */ /** The character type (UTF-8 octet). */ typedef unsigned char yaml_char_t; /** The version directive data. */ typedef struct yaml_version_directive_s { /** The major version number. */ int major; /** The minor version number. */ int minor; } yaml_version_directive_t; /** The tag directive data. */ typedef struct yaml_tag_directive_s { /** The tag handle. */ yaml_char_t *handle; /** The tag prefix. */ yaml_char_t *prefix; } yaml_tag_directive_t; /** The stream encoding. */ typedef enum yaml_encoding_e { /** Let the parser choose the encoding. */ YAML_ANY_ENCODING, /** The default UTF-8 encoding. */ YAML_UTF8_ENCODING, /** The UTF-16-LE encoding with BOM. */ YAML_UTF16LE_ENCODING, /** The UTF-16-BE encoding with BOM. */ YAML_UTF16BE_ENCODING } yaml_encoding_t; /** Line break types. */ typedef enum yaml_break_e { /** Let the parser choose the break type. */ YAML_ANY_BREAK, /** Use CR for line breaks (Mac style). */ YAML_CR_BREAK, /** Use LN for line breaks (Unix style). */ YAML_LN_BREAK, /** Use CR LN for line breaks (DOS style). */ YAML_CRLN_BREAK } yaml_break_t; /** Many bad things could happen with the parser and emitter. */ typedef enum yaml_error_type_e { /** No error is produced. */ YAML_NO_ERROR, /** Cannot allocate or reallocate a block of memory. */ YAML_MEMORY_ERROR, /** Cannot read or decode the input stream. */ YAML_READER_ERROR, /** Cannot scan the input stream. */ YAML_SCANNER_ERROR, /** Cannot parse the input stream. */ YAML_PARSER_ERROR, /** Cannot compose a YAML document. */ YAML_COMPOSER_ERROR, /** Cannot write to the output stream. */ YAML_WRITER_ERROR, /** Cannot emit a YAML stream. */ YAML_EMITTER_ERROR } yaml_error_type_t; /** The pointer position. */ typedef struct yaml_mark_s { /** The position index. */ size_t index; /** The position line. */ size_t line; /** The position column. */ size_t column; } yaml_mark_t; /** @} */ /** * @defgroup styles Node Styles * @{ */ /** Scalar styles. */ typedef enum yaml_scalar_style_e { /** Let the emitter choose the style. */ YAML_ANY_SCALAR_STYLE, /** The plain scalar style. */ YAML_PLAIN_SCALAR_STYLE, /** The single-quoted scalar style. */ YAML_SINGLE_QUOTED_SCALAR_STYLE, /** The double-quoted scalar style. */ YAML_DOUBLE_QUOTED_SCALAR_STYLE, /** The literal scalar style. */ YAML_LITERAL_SCALAR_STYLE, /** The folded scalar style. */ YAML_FOLDED_SCALAR_STYLE } yaml_scalar_style_t; /** Sequence styles. */ typedef enum yaml_sequence_style_e { /** Let the emitter choose the style. */ YAML_ANY_SEQUENCE_STYLE, /** The block sequence style. */ YAML_BLOCK_SEQUENCE_STYLE, /** The flow sequence style. */ YAML_FLOW_SEQUENCE_STYLE } yaml_sequence_style_t; /** Mapping styles. */ typedef enum yaml_mapping_style_e { /** Let the emitter choose the style. */ YAML_ANY_MAPPING_STYLE, /** The block mapping style. */ YAML_BLOCK_MAPPING_STYLE, /** The flow mapping style. */ YAML_FLOW_MAPPING_STYLE /* YAML_FLOW_SET_MAPPING_STYLE */ } yaml_mapping_style_t; /** @} */ /** * @defgroup tokens Tokens * @{ */ /** Token types. */ typedef enum yaml_token_type_e { /** An empty token. */ YAML_NO_TOKEN, /** A STREAM-START token. */ YAML_STREAM_START_TOKEN, /** A STREAM-END token. */ YAML_STREAM_END_TOKEN, /** A VERSION-DIRECTIVE token. */ YAML_VERSION_DIRECTIVE_TOKEN, /** A TAG-DIRECTIVE token. */ YAML_TAG_DIRECTIVE_TOKEN, /** A DOCUMENT-START token. */ YAML_DOCUMENT_START_TOKEN, /** A DOCUMENT-END token. */ YAML_DOCUMENT_END_TOKEN, /** A BLOCK-SEQUENCE-START token. */ YAML_BLOCK_SEQUENCE_START_TOKEN, /** A BLOCK-MAPPING-START token. */ YAML_BLOCK_MAPPING_START_TOKEN, /** A BLOCK-END token. */ YAML_BLOCK_END_TOKEN, /** A FLOW-SEQUENCE-START token. */ YAML_FLOW_SEQUENCE_START_TOKEN, /** A FLOW-SEQUENCE-END token. */ YAML_FLOW_SEQUENCE_END_TOKEN, /** A FLOW-MAPPING-START token. */ YAML_FLOW_MAPPING_START_TOKEN, /** A FLOW-MAPPING-END token. */ YAML_FLOW_MAPPING_END_TOKEN, /** A BLOCK-ENTRY token. */ YAML_BLOCK_ENTRY_TOKEN, /** A FLOW-ENTRY token. */ YAML_FLOW_ENTRY_TOKEN, /** A KEY token. */ YAML_KEY_TOKEN, /** A VALUE token. */ YAML_VALUE_TOKEN, /** An ALIAS token. */ YAML_ALIAS_TOKEN, /** An ANCHOR token. */ YAML_ANCHOR_TOKEN, /** A TAG token. */ YAML_TAG_TOKEN, /** A SCALAR token. */ YAML_SCALAR_TOKEN } yaml_token_type_t; /** The token structure. */ typedef struct yaml_token_s { /** The token type. */ yaml_token_type_t type; /** The token data. */ union { /** The stream start (for @c YAML_STREAM_START_TOKEN). */ struct { /** The stream encoding. */ yaml_encoding_t encoding; } stream_start; /** The alias (for @c YAML_ALIAS_TOKEN). */ struct { /** The alias value. */ yaml_char_t *value; } alias; /** The anchor (for @c YAML_ANCHOR_TOKEN). */ struct { /** The anchor value. */ yaml_char_t *value; } anchor; /** The tag (for @c YAML_TAG_TOKEN). */ struct { /** The tag handle. */ yaml_char_t *handle; /** The tag suffix. */ yaml_char_t *suffix; } tag; /** The scalar value (for @c YAML_SCALAR_TOKEN). */ struct { /** The scalar value. */ yaml_char_t *value; /** The length of the scalar value. */ size_t length; /** The scalar style. */ yaml_scalar_style_t style; } scalar; /** The version directive (for @c YAML_VERSION_DIRECTIVE_TOKEN). */ struct { /** The major version number. */ int major; /** The minor version number. */ int minor; } version_directive; /** The tag directive (for @c YAML_TAG_DIRECTIVE_TOKEN). */ struct { /** The tag handle. */ yaml_char_t *handle; /** The tag prefix. */ yaml_char_t *prefix; } tag_directive; } data; /** The beginning of the token. */ yaml_mark_t start_mark; /** The end of the token. */ yaml_mark_t end_mark; } yaml_token_t; /** * Free any memory allocated for a token object. * * @param[in,out] token A token object. */ YAML_DECLARE(void) yaml_token_delete(yaml_token_t *token); /** @} */ /** * @defgroup events Events * @{ */ /** Event types. */ typedef enum yaml_event_type_e { /** An empty event. */ YAML_NO_EVENT, /** A STREAM-START event. */ YAML_STREAM_START_EVENT, /** A STREAM-END event. */ YAML_STREAM_END_EVENT, /** A DOCUMENT-START event. */ YAML_DOCUMENT_START_EVENT, /** A DOCUMENT-END event. */ YAML_DOCUMENT_END_EVENT, /** An ALIAS event. */ YAML_ALIAS_EVENT, /** A SCALAR event. */ YAML_SCALAR_EVENT, /** A SEQUENCE-START event. */ YAML_SEQUENCE_START_EVENT, /** A SEQUENCE-END event. */ YAML_SEQUENCE_END_EVENT, /** A MAPPING-START event. */ YAML_MAPPING_START_EVENT, /** A MAPPING-END event. */ YAML_MAPPING_END_EVENT } yaml_event_type_t; /** The event structure. */ typedef struct yaml_event_s { /** The event type. */ yaml_event_type_t type; /** The event data. */ union { /** The stream parameters (for @c YAML_STREAM_START_EVENT). */ struct { /** The document encoding. */ yaml_encoding_t encoding; } stream_start; /** The document parameters (for @c YAML_DOCUMENT_START_EVENT). */ struct { /** The version directive. */ yaml_version_directive_t *version_directive; /** The list of tag directives. */ struct { /** The beginning of the tag directives list. */ yaml_tag_directive_t *start; /** The end of the tag directives list. */ yaml_tag_directive_t *end; } tag_directives; /** Is the document indicator implicit? */ int implicit; } document_start; /** The document end parameters (for @c YAML_DOCUMENT_END_EVENT). */ struct { /** Is the document end indicator implicit? */ int implicit; } document_end; /** The alias parameters (for @c YAML_ALIAS_EVENT). */ struct { /** The anchor. */ yaml_char_t *anchor; } alias; /** The scalar parameters (for @c YAML_SCALAR_EVENT). */ struct { /** The anchor. */ yaml_char_t *anchor; /** The tag. */ yaml_char_t *tag; /** The scalar value. */ yaml_char_t *value; /** The length of the scalar value. */ size_t length; /** Is the tag optional for the plain style? */ int plain_implicit; /** Is the tag optional for any non-plain style? */ int quoted_implicit; /** The scalar style. */ yaml_scalar_style_t style; } scalar; /** The sequence parameters (for @c YAML_SEQUENCE_START_EVENT). */ struct { /** The anchor. */ yaml_char_t *anchor; /** The tag. */ yaml_char_t *tag; /** Is the tag optional? */ int implicit; /** The sequence style. */ yaml_sequence_style_t style; } sequence_start; /** The mapping parameters (for @c YAML_MAPPING_START_EVENT). */ struct { /** The anchor. */ yaml_char_t *anchor; /** The tag. */ yaml_char_t *tag; /** Is the tag optional? */ int implicit; /** The mapping style. */ yaml_mapping_style_t style; } mapping_start; } data; /** The beginning of the event. */ yaml_mark_t start_mark; /** The end of the event. */ yaml_mark_t end_mark; } yaml_event_t; /** * Create the STREAM-START event. * * @param[out] event An empty event object. * @param[in] encoding The stream encoding. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_stream_start_event_initialize(yaml_event_t *event, yaml_encoding_t encoding); /** * Create the STREAM-END event. * * @param[out] event An empty event object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_stream_end_event_initialize(yaml_event_t *event); /** * Create the DOCUMENT-START event. * * The @a implicit argument is considered as a stylistic parameter and may be * ignored by the emitter. * * @param[out] event An empty event object. * @param[in] version_directive The %YAML directive value or * @c NULL. * @param[in] tag_directives_start The beginning of the %TAG * directives list. * @param[in] tag_directives_end The end of the %TAG directives * list. * @param[in] implicit If the document start indicator is * implicit. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_document_start_event_initialize(yaml_event_t *event, yaml_version_directive_t *version_directive, yaml_tag_directive_t *tag_directives_start, yaml_tag_directive_t *tag_directives_end, int implicit); /** * Create the DOCUMENT-END event. * * The @a implicit argument is considered as a stylistic parameter and may be * ignored by the emitter. * * @param[out] event An empty event object. * @param[in] implicit If the document end indicator is implicit. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_document_end_event_initialize(yaml_event_t *event, int implicit); /** * Create an ALIAS event. * * @param[out] event An empty event object. * @param[in] anchor The anchor value. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_alias_event_initialize(yaml_event_t *event, const yaml_char_t *anchor); /** * Create a SCALAR event. * * The @a style argument may be ignored by the emitter. * * Either the @a tag attribute or one of the @a plain_implicit and * @a quoted_implicit flags must be set. * * @param[out] event An empty event object. * @param[in] anchor The scalar anchor or @c NULL. * @param[in] tag The scalar tag or @c NULL. * @param[in] value The scalar value. * @param[in] length The length of the scalar value. * @param[in] plain_implicit If the tag may be omitted for the plain * style. * @param[in] quoted_implicit If the tag may be omitted for any * non-plain style. * @param[in] style The scalar style. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_scalar_event_initialize(yaml_event_t *event, const yaml_char_t *anchor, const yaml_char_t *tag, const yaml_char_t *value, int length, int plain_implicit, int quoted_implicit, yaml_scalar_style_t style); /** * Create a SEQUENCE-START event. * * The @a style argument may be ignored by the emitter. * * Either the @a tag attribute or the @a implicit flag must be set. * * @param[out] event An empty event object. * @param[in] anchor The sequence anchor or @c NULL. * @param[in] tag The sequence tag or @c NULL. * @param[in] implicit If the tag may be omitted. * @param[in] style The sequence style. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_sequence_start_event_initialize(yaml_event_t *event, const yaml_char_t *anchor, const yaml_char_t *tag, int implicit, yaml_sequence_style_t style); /** * Create a SEQUENCE-END event. * * @param[out] event An empty event object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_sequence_end_event_initialize(yaml_event_t *event); /** * Create a MAPPING-START event. * * The @a style argument may be ignored by the emitter. * * Either the @a tag attribute or the @a implicit flag must be set. * * @param[out] event An empty event object. * @param[in] anchor The mapping anchor or @c NULL. * @param[in] tag The mapping tag or @c NULL. * @param[in] implicit If the tag may be omitted. * @param[in] style The mapping style. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_mapping_start_event_initialize(yaml_event_t *event, const yaml_char_t *anchor, const yaml_char_t *tag, int implicit, yaml_mapping_style_t style); /** * Create a MAPPING-END event. * * @param[out] event An empty event object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_mapping_end_event_initialize(yaml_event_t *event); /** * Free any memory allocated for an event object. * * @param[in,out] event An event object. */ YAML_DECLARE(void) yaml_event_delete(yaml_event_t *event); /** @} */ /** * @defgroup nodes Nodes * @{ */ /** The tag @c !!null with the only possible value: @c null. */ #define YAML_NULL_TAG "tag:yaml.org,2002:null" /** The tag @c !!bool with the values: @c true and @c false. */ #define YAML_BOOL_TAG "tag:yaml.org,2002:bool" /** The tag @c !!str for string values. */ #define YAML_STR_TAG "tag:yaml.org,2002:str" /** The tag @c !!int for integer values. */ #define YAML_INT_TAG "tag:yaml.org,2002:int" /** The tag @c !!float for float values. */ #define YAML_FLOAT_TAG "tag:yaml.org,2002:float" /** The tag @c !!timestamp for date and time values. */ #define YAML_TIMESTAMP_TAG "tag:yaml.org,2002:timestamp" /** The tag @c !!seq is used to denote sequences. */ #define YAML_SEQ_TAG "tag:yaml.org,2002:seq" /** The tag @c !!map is used to denote mapping. */ #define YAML_MAP_TAG "tag:yaml.org,2002:map" /** The default scalar tag is @c !!str. */ #define YAML_DEFAULT_SCALAR_TAG YAML_STR_TAG /** The default sequence tag is @c !!seq. */ #define YAML_DEFAULT_SEQUENCE_TAG YAML_SEQ_TAG /** The default mapping tag is @c !!map. */ #define YAML_DEFAULT_MAPPING_TAG YAML_MAP_TAG /** Node types. */ typedef enum yaml_node_type_e { /** An empty node. */ YAML_NO_NODE, /** A scalar node. */ YAML_SCALAR_NODE, /** A sequence node. */ YAML_SEQUENCE_NODE, /** A mapping node. */ YAML_MAPPING_NODE } yaml_node_type_t; /** The forward definition of a document node structure. */ typedef struct yaml_node_s yaml_node_t; /** An element of a sequence node. */ typedef int yaml_node_item_t; /** An element of a mapping node. */ typedef struct yaml_node_pair_s { /** The key of the element. */ int key; /** The value of the element. */ int value; } yaml_node_pair_t; /** The node structure. */ struct yaml_node_s { /** The node type. */ yaml_node_type_t type; /** The node tag. */ yaml_char_t *tag; /** The node data. */ union { /** The scalar parameters (for @c YAML_SCALAR_NODE). */ struct { /** The scalar value. */ yaml_char_t *value; /** The length of the scalar value. */ size_t length; /** The scalar style. */ yaml_scalar_style_t style; } scalar; /** The sequence parameters (for @c YAML_SEQUENCE_NODE). */ struct { /** The stack of sequence items. */ struct { /** The beginning of the stack. */ yaml_node_item_t *start; /** The end of the stack. */ yaml_node_item_t *end; /** The top of the stack. */ yaml_node_item_t *top; } items; /** The sequence style. */ yaml_sequence_style_t style; } sequence; /** The mapping parameters (for @c YAML_MAPPING_NODE). */ struct { /** The stack of mapping pairs (key, value). */ struct { /** The beginning of the stack. */ yaml_node_pair_t *start; /** The end of the stack. */ yaml_node_pair_t *end; /** The top of the stack. */ yaml_node_pair_t *top; } pairs; /** The mapping style. */ yaml_mapping_style_t style; } mapping; } data; /** The beginning of the node. */ yaml_mark_t start_mark; /** The end of the node. */ yaml_mark_t end_mark; }; /** The document structure. */ typedef struct yaml_document_s { /** The document nodes. */ struct { /** The beginning of the stack. */ yaml_node_t *start; /** The end of the stack. */ yaml_node_t *end; /** The top of the stack. */ yaml_node_t *top; } nodes; /** The version directive. */ yaml_version_directive_t *version_directive; /** The list of tag directives. */ struct { /** The beginning of the tag directives list. */ yaml_tag_directive_t *start; /** The end of the tag directives list. */ yaml_tag_directive_t *end; } tag_directives; /** Is the document start indicator implicit? */ int start_implicit; /** Is the document end indicator implicit? */ int end_implicit; /** The beginning of the document. */ yaml_mark_t start_mark; /** The end of the document. */ yaml_mark_t end_mark; } yaml_document_t; /** * Create a YAML document. * * @param[out] document An empty document object. * @param[in] version_directive The %YAML directive value or * @c NULL. * @param[in] tag_directives_start The beginning of the %TAG * directives list. * @param[in] tag_directives_end The end of the %TAG directives * list. * @param[in] start_implicit If the document start indicator is * implicit. * @param[in] end_implicit If the document end indicator is * implicit. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_document_initialize(yaml_document_t *document, yaml_version_directive_t *version_directive, yaml_tag_directive_t *tag_directives_start, yaml_tag_directive_t *tag_directives_end, int start_implicit, int end_implicit); /** * Delete a YAML document and all its nodes. * * @param[in,out] document A document object. */ YAML_DECLARE(void) yaml_document_delete(yaml_document_t *document); /** * Get a node of a YAML document. * * The pointer returned by this function is valid until any of the functions * modifying the documents are called. * * @param[in] document A document object. * @param[in] index The node id. * * @returns the node objct or @c NULL if @c node_id is out of range. */ YAML_DECLARE(yaml_node_t *) yaml_document_get_node(yaml_document_t *document, int index); /** * Get the root of a YAML document node. * * The root object is the first object added to the document. * * The pointer returned by this function is valid until any of the functions * modifying the documents are called. * * An empty document produced by the parser signifies the end of a YAML * stream. * * @param[in] document A document object. * * @returns the node object or @c NULL if the document is empty. */ YAML_DECLARE(yaml_node_t *) yaml_document_get_root_node(yaml_document_t *document); /** * Create a SCALAR node and attach it to the document. * * The @a style argument may be ignored by the emitter. * * @param[in,out] document A document object. * @param[in] tag The scalar tag. * @param[in] value The scalar value. * @param[in] length The length of the scalar value. * @param[in] style The scalar style. * * @returns the node id or @c 0 on error. */ YAML_DECLARE(int) yaml_document_add_scalar(yaml_document_t *document, const yaml_char_t *tag, const yaml_char_t *value, int length, yaml_scalar_style_t style); /** * Create a SEQUENCE node and attach it to the document. * * The @a style argument may be ignored by the emitter. * * @param[in,out] document A document object. * @param[in] tag The sequence tag. * @param[in] style The sequence style. * * @returns the node id or @c 0 on error. */ YAML_DECLARE(int) yaml_document_add_sequence(yaml_document_t *document, const yaml_char_t *tag, yaml_sequence_style_t style); /** * Create a MAPPING node and attach it to the document. * * The @a style argument may be ignored by the emitter. * * @param[in,out] document A document object. * @param[in] tag The sequence tag. * @param[in] style The sequence style. * * @returns the node id or @c 0 on error. */ YAML_DECLARE(int) yaml_document_add_mapping(yaml_document_t *document, const yaml_char_t *tag, yaml_mapping_style_t style); /** * Add an item to a SEQUENCE node. * * @param[in,out] document A document object. * @param[in] sequence The sequence node id. * @param[in] item The item node id. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_document_append_sequence_item(yaml_document_t *document, int sequence, int item); /** * Add a pair of a key and a value to a MAPPING node. * * @param[in,out] document A document object. * @param[in] mapping The mapping node id. * @param[in] key The key node id. * @param[in] value The value node id. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_document_append_mapping_pair(yaml_document_t *document, int mapping, int key, int value); /** @} */ /** * @defgroup parser Parser Definitions * @{ */ /** * 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 @a size bytes to the @a * buffer. The number of written bytes should be set to the @a length variable. * * @param[in,out] data A pointer to an application data specified by * yaml_parser_set_input(). * @param[out] buffer The buffer to write the data from the source. * @param[in] size The size of the buffer. * @param[out] size_read The actual number of bytes read from the source. * * @returns On success, the handler should return @c 1. If the handler failed, * the returned value should be @c 0. On EOF, the handler should set the * @a size_read to @c 0 and return @c 1. */ typedef int yaml_read_handler_t(void *data, unsigned char *buffer, size_t size, size_t *size_read); /** * This structure holds information about a potential simple key. */ typedef struct yaml_simple_key_s { /** Is a simple key possible? */ int possible; /** Is a simple key required? */ int required; /** The number of the token. */ size_t token_number; /** The position mark. */ yaml_mark_t mark; } yaml_simple_key_t; /** * The states of the parser. */ typedef enum yaml_parser_state_e { /** Expect STREAM-START. */ YAML_PARSE_STREAM_START_STATE, /** Expect the beginning of an implicit document. */ YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE, /** Expect DOCUMENT-START. */ YAML_PARSE_DOCUMENT_START_STATE, /** Expect the content of a document. */ YAML_PARSE_DOCUMENT_CONTENT_STATE, /** Expect DOCUMENT-END. */ YAML_PARSE_DOCUMENT_END_STATE, /** Expect a block node. */ YAML_PARSE_BLOCK_NODE_STATE, /** Expect a block node or indentless sequence. */ YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE, /** Expect a flow node. */ YAML_PARSE_FLOW_NODE_STATE, /** Expect the first entry of a block sequence. */ YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE, /** Expect an entry of a block sequence. */ YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE, /** Expect an entry of an indentless sequence. */ YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE, /** Expect the first key of a block mapping. */ YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE, /** Expect a block mapping key. */ YAML_PARSE_BLOCK_MAPPING_KEY_STATE, /** Expect a block mapping value. */ YAML_PARSE_BLOCK_MAPPING_VALUE_STATE, /** Expect the first entry of a flow sequence. */ YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE, /** Expect an entry of a flow sequence. */ YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE, /** Expect a key of an ordered mapping. */ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE, /** Expect a value of an ordered mapping. */ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE, /** Expect the and of an ordered mapping entry. */ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE, /** Expect the first key of a flow mapping. */ YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE, /** Expect a key of a flow mapping. */ YAML_PARSE_FLOW_MAPPING_KEY_STATE, /** Expect a value of a flow mapping. */ YAML_PARSE_FLOW_MAPPING_VALUE_STATE, /** Expect an empty value of a flow mapping. */ YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE, /** Expect nothing. */ YAML_PARSE_END_STATE } yaml_parser_state_t; /** * This structure holds aliases data. */ typedef struct yaml_alias_data_s { /** The anchor. */ yaml_char_t *anchor; /** The node id. */ int index; /** The anchor mark. */ yaml_mark_t mark; } yaml_alias_data_t; /** * The parser structure. * * All members are internal. Manage the structure using the @c yaml_parser_ * family of functions. */ typedef struct yaml_parser_s { /** * @name Error handling * @{ */ /** Error type. */ yaml_error_type_t error; /** Error description. */ const char *problem; /** The byte about which the problem occured. */ size_t problem_offset; /** The problematic value (@c -1 is none). */ int problem_value; /** The problem position. */ yaml_mark_t problem_mark; /** The error context. */ const char *context; /** The context position. */ yaml_mark_t context_mark; /** * @} */ /** * @name Reader stuff * @{ */ /** Read handler. */ yaml_read_handler_t *read_handler; /** A pointer for passing to the read handler. */ void *read_handler_data; /** Standard (string or file) input data. */ union { /** String input data. */ struct { /** The string start pointer. */ const unsigned char *start; /** The string end pointer. */ const unsigned char *end; /** The string current position. */ const unsigned char *current; } string; /** File input data. */ FILE *file; } input; /** EOF flag */ int eof; /** The working buffer. */ struct { /** The beginning of the buffer. */ yaml_char_t *start; /** The end of the buffer. */ yaml_char_t *end; /** The current position of the buffer. */ yaml_char_t *pointer; /** The last filled position of the buffer. */ yaml_char_t *last; } buffer; /* The number of unread characters in the buffer. */ size_t unread; /** The raw buffer. */ struct { /** The beginning of the buffer. */ unsigned char *start; /** The end of the buffer. */ unsigned char *end; /** The current position of the buffer. */ unsigned char *pointer; /** The last filled position of the buffer. */ unsigned char *last; } raw_buffer; /** The input encoding. */ yaml_encoding_t encoding; /** The offset of the current position (in bytes). */ size_t offset; /** The mark of the current position. */ yaml_mark_t mark; /** * @} */ /** * @name Scanner stuff * @{ */ /** Have we started to scan the input stream? */ int stream_start_produced; /** Have we reached the end of the input stream? */ int stream_end_produced; /** The number of unclosed '[' and '{' indicators. */ int flow_level; /** The tokens queue. */ struct { /** The beginning of the tokens queue. */ yaml_token_t *start; /** The end of the tokens queue. */ yaml_token_t *end; /** The head of the tokens queue. */ yaml_token_t *head; /** The tail of the tokens queue. */ yaml_token_t *tail; } tokens; /** The number of tokens fetched from the queue. */ size_t tokens_parsed; /** Does the tokens queue contain a token ready for dequeueing. */ int token_available; /** The indentation levels stack. */ struct { /** The beginning of the stack. */ int *start; /** The end of the stack. */ int *end; /** The top of the stack. */ int *top; } indents; /** The current indentation level. */ int indent; /** May a simple key occur at the current position? */ int simple_key_allowed; /** The stack of simple keys. */ struct { /** The beginning of the stack. */ yaml_simple_key_t *start; /** The end of the stack. */ yaml_simple_key_t *end; /** The top of the stack. */ yaml_simple_key_t *top; } simple_keys; /** * @} */ /** * @name Parser stuff * @{ */ /** The parser states stack. */ struct { /** The beginning of the stack. */ yaml_parser_state_t *start; /** The end of the stack. */ yaml_parser_state_t *end; /** The top of the stack. */ yaml_parser_state_t *top; } states; /** The current parser state. */ yaml_parser_state_t state; /** The stack of marks. */ struct { /** The beginning of the stack. */ yaml_mark_t *start; /** The end of the stack. */ yaml_mark_t *end; /** The top of the stack. */ yaml_mark_t *top; } marks; /** The list of TAG directives. */ struct { /** The beginning of the list. */ yaml_tag_directive_t *start; /** The end of the list. */ yaml_tag_directive_t *end; /** The top of the list. */ yaml_tag_directive_t *top; } tag_directives; /** * @} */ /** * @name Dumper stuff * @{ */ /** The alias data. */ struct { /** The beginning of the list. */ yaml_alias_data_t *start; /** The end of the list. */ yaml_alias_data_t *end; /** The top of the list. */ yaml_alias_data_t *top; } aliases; /** The currently parsed document. */ yaml_document_t *document; /** * @} */ } yaml_parser_t; /** * Initialize a parser. * * This function creates a new parser object. An application is responsible * for destroying the object using the yaml_parser_delete() function. * * @param[out] parser An empty parser object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_parser_initialize(yaml_parser_t *parser); /** * Destroy a parser. * * @param[in,out] parser A parser object. */ YAML_DECLARE(void) yaml_parser_delete(yaml_parser_t *parser); /** * Set a string input. * * Note that the @a input pointer must be valid while the @a parser object * exists. The application is responsible for destroing @a input after * destroying the @a parser. * * @param[in,out] parser A parser object. * @param[in] input A source data. * @param[in] size The length of the source data in bytes. */ YAML_DECLARE(void) yaml_parser_set_input_string(yaml_parser_t *parser, const unsigned char *input, size_t size); /** * Set a file input. * * @a file should be a file object open for reading. The application is * responsible for closing the @a file. * * @param[in,out] parser A parser object. * @param[in] file An open file. */ YAML_DECLARE(void) yaml_parser_set_input_file(yaml_parser_t *parser, FILE *file); /** * Set a generic input handler. * * @param[in,out] parser A parser object. * @param[in] handler A read handler. * @param[in] data Any application data for passing to the read * handler. */ YAML_DECLARE(void) yaml_parser_set_input(yaml_parser_t *parser, yaml_read_handler_t *handler, void *data); /** * Set the source encoding. * * @param[in,out] parser A parser object. * @param[in] encoding The source encoding. */ YAML_DECLARE(void) yaml_parser_set_encoding(yaml_parser_t *parser, yaml_encoding_t encoding); /** * Scan the input stream and produce the next token. * * Call the function subsequently to produce a sequence of tokens corresponding * to the input stream. The initial token has the type * @c YAML_STREAM_START_TOKEN while the ending token has the type * @c YAML_STREAM_END_TOKEN. * * An application is responsible for freeing any buffers associated with the * produced token object using the @c yaml_token_delete function. * * An application must not alternate the calls of yaml_parser_scan() with the * calls of yaml_parser_parse() or yaml_parser_load(). Doing this will break * the parser. * * @param[in,out] parser A parser object. * @param[out] token An empty token object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token); /** * Parse the input stream and produce the next parsing event. * * Call the function subsequently to produce a sequence of events corresponding * to the input stream. The initial event has the type * @c YAML_STREAM_START_EVENT while the ending event has the type * @c YAML_STREAM_END_EVENT. * * An application is responsible for freeing any buffers associated with the * produced event object using the yaml_event_delete() function. * * An application must not alternate the calls of yaml_parser_parse() with the * calls of yaml_parser_scan() or yaml_parser_load(). Doing this will break the * parser. * * @param[in,out] parser A parser object. * @param[out] event An empty event object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event); /** * Parse the input stream and produce the next YAML document. * * Call this function subsequently to produce a sequence of documents * constituting the input stream. * * If the produced document has no root node, it means that the document * end has been reached. * * An application is responsible for freeing any data associated with the * produced document object using the yaml_document_delete() function. * * An application must not alternate the calls of yaml_parser_load() with the * calls of yaml_parser_scan() or yaml_parser_parse(). Doing this will break * the parser. * * @param[in,out] parser A parser object. * @param[out] document An empty document object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document); /** @} */ /** * @defgroup emitter 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. */ typedef int yaml_write_handler_t(void *data, unsigned char *buffer, size_t size); /** The emitter states. */ typedef enum yaml_emitter_state_e { /** Expect STREAM-START. */ YAML_EMIT_STREAM_START_STATE, /** Expect the first DOCUMENT-START or STREAM-END. */ YAML_EMIT_FIRST_DOCUMENT_START_STATE, /** Expect DOCUMENT-START or STREAM-END. */ YAML_EMIT_DOCUMENT_START_STATE, /** Expect the content of a document. */ YAML_EMIT_DOCUMENT_CONTENT_STATE, /** Expect DOCUMENT-END. */ YAML_EMIT_DOCUMENT_END_STATE, /** Expect the first item of a flow sequence. */ YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE, /** Expect an item of a flow sequence. */ YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE, /** Expect the first key of a flow mapping. */ YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE, /** Expect a key of a flow mapping. */ YAML_EMIT_FLOW_MAPPING_KEY_STATE, /** Expect a value for a simple key of a flow mapping. */ YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE, /** Expect a value of a flow mapping. */ YAML_EMIT_FLOW_MAPPING_VALUE_STATE, /** Expect the first item of a block sequence. */ YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE, /** Expect an item of a block sequence. */ YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE, /** Expect the first key of a block mapping. */ YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE, /** Expect the key of a block mapping. */ YAML_EMIT_BLOCK_MAPPING_KEY_STATE, /** Expect a value for a simple key of a block mapping. */ YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE, /** Expect a value of a block mapping. */ YAML_EMIT_BLOCK_MAPPING_VALUE_STATE, /** Expect nothing. */ YAML_EMIT_END_STATE } yaml_emitter_state_t; /* This is needed for C++ */ typedef struct yaml_anchors_s { /** The number of references. */ int references; /** The anchor id. */ int anchor; /** If the node has been emitted? */ int serialized; } yaml_anchors_t; /** * The emitter structure. * * All members are internal. Manage the structure using the @c yaml_emitter_ * family of functions. */ typedef struct yaml_emitter_s { /** * @name Error handling * @{ */ /** Error type. */ yaml_error_type_t error; /** Error description. */ const char *problem; /** * @} */ /** * @name Writer stuff * @{ */ /** Write handler. */ yaml_write_handler_t *write_handler; /** A pointer for passing to the write handler. */ void *write_handler_data; /** Standard (string or file) output data. */ union { /** String output data. */ struct { /** The buffer pointer. */ unsigned char *buffer; /** The buffer size. */ size_t size; /** The number of written bytes. */ size_t *size_written; } string; /** File output data. */ FILE *file; } output; /** The working buffer. */ struct { /** The beginning of the buffer. */ yaml_char_t *start; /** The end of the buffer. */ yaml_char_t *end; /** The current position of the buffer. */ yaml_char_t *pointer; /** The last filled position of the buffer. */ yaml_char_t *last; } buffer; /** The raw buffer. */ struct { /** The beginning of the buffer. */ unsigned char *start; /** The end of the buffer. */ unsigned char *end; /** The current position of the buffer. */ unsigned char *pointer; /** The last filled position of the buffer. */ unsigned char *last; } raw_buffer; /** The stream encoding. */ yaml_encoding_t encoding; /** * @} */ /** * @name Emitter stuff * @{ */ /** If the output is in the canonical style? */ int canonical; /** The number of indentation spaces. */ int best_indent; /** The preferred width of the output lines. */ int best_width; /** Allow unescaped non-ASCII characters? */ int unicode; /** The preferred line break. */ yaml_break_t line_break; /** The stack of states. */ struct { /** The beginning of the stack. */ yaml_emitter_state_t *start; /** The end of the stack. */ yaml_emitter_state_t *end; /** The top of the stack. */ yaml_emitter_state_t *top; } states; /** The current emitter state. */ yaml_emitter_state_t state; /** The event queue. */ struct { /** The beginning of the event queue. */ yaml_event_t *start; /** The end of the event queue. */ yaml_event_t *end; /** The head of the event queue. */ yaml_event_t *head; /** The tail of the event queue. */ yaml_event_t *tail; } events; /** The stack of indentation levels. */ struct { /** The beginning of the stack. */ int *start; /** The end of the stack. */ int *end; /** The top of the stack. */ int *top; } indents; /** The list of tag directives. */ struct { /** The beginning of the list. */ yaml_tag_directive_t *start; /** The end of the list. */ yaml_tag_directive_t *end; /** The top of the list. */ yaml_tag_directive_t *top; } tag_directives; /** The current indentation level. */ int indent; /** The current flow level. */ int flow_level; /** Is it the document root context? */ int root_context; /** Is it a sequence context? */ int sequence_context; /** Is it a mapping context? */ int mapping_context; /** Is it a simple mapping key context? */ int simple_key_context; /** The current line. */ int line; /** The current column. */ int column; /** If the last character was a whitespace? */ int whitespace; /** If the last character was an indentation character (' ', '-', '?', ':')? */ int indention; /** If an explicit document end is required? */ int open_ended; /** Anchor analysis. */ struct { /** The anchor value. */ yaml_char_t *anchor; /** The anchor length. */ size_t anchor_length; /** Is it an alias? */ int alias; } anchor_data; /** Tag analysis. */ struct { /** The tag handle. */ yaml_char_t *handle; /** The tag handle length. */ size_t handle_length; /** The tag suffix. */ yaml_char_t *suffix; /** The tag suffix length. */ size_t suffix_length; } tag_data; /** Scalar analysis. */ struct { /** The scalar value. */ yaml_char_t *value; /** The scalar length. */ size_t length; /** Does the scalar contain line breaks? */ int multiline; /** Can the scalar be expessed in the flow plain style? */ int flow_plain_allowed; /** Can the scalar be expressed in the block plain style? */ int block_plain_allowed; /** Can the scalar be expressed in the single quoted style? */ int single_quoted_allowed; /** Can the scalar be expressed in the literal or folded styles? */ int block_allowed; /** The output style. */ yaml_scalar_style_t style; } scalar_data; /** * @} */ /** * @name Dumper stuff * @{ */ /** If the stream was already opened? */ int opened; /** If the stream was already closed? */ int closed; /** The information associated with the document nodes. */ yaml_anchors_t *anchors; /** The last assigned anchor id. */ int last_anchor_id; /** The currently emitted document. */ yaml_document_t *document; /** * @} */ } yaml_emitter_t; /** * Initialize an emitter. * * This function creates a new emitter object. An application is responsible * for destroying the object using the yaml_emitter_delete() function. * * @param[out] emitter An empty parser object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_emitter_initialize(yaml_emitter_t *emitter); /** * Destroy an emitter. * * @param[in,out] emitter An emitter object. */ YAML_DECLARE(void) yaml_emitter_delete(yaml_emitter_t *emitter); /** * Set a string output. * * The emitter will write the output characters to the @a output buffer of the * size @a size. The emitter will set @a size_written to the number of written * bytes. If the buffer is smaller than required, the emitter produces the * YAML_WRITE_ERROR error. * * @param[in,out] emitter An emitter object. * @param[in] output An output buffer. * @param[in] size The buffer size. * @param[in] size_written The pointer to save the number of written * bytes. */ YAML_DECLARE(void) yaml_emitter_set_output_string(yaml_emitter_t *emitter, unsigned char *output, size_t size, size_t *size_written); /** * Set a file output. * * @a file should be a file object open for writing. The application is * responsible for closing the @a file. * * @param[in,out] emitter An emitter object. * @param[in] file An open file. */ YAML_DECLARE(void) yaml_emitter_set_output_file(yaml_emitter_t *emitter, FILE *file); /** * Set a generic output handler. * * @param[in,out] emitter An emitter object. * @param[in] handler A write handler. * @param[in] data Any application data for passing to the write * handler. */ YAML_DECLARE(void) yaml_emitter_set_output(yaml_emitter_t *emitter, yaml_write_handler_t *handler, void *data); /** * Set the output encoding. * * @param[in,out] emitter An emitter object. * @param[in] encoding The output encoding. */ YAML_DECLARE(void) yaml_emitter_set_encoding(yaml_emitter_t *emitter, yaml_encoding_t encoding); /** * Set if the output should be in the "canonical" format as in the YAML * specification. * * @param[in,out] emitter An emitter object. * @param[in] canonical If the output is canonical. */ YAML_DECLARE(void) yaml_emitter_set_canonical(yaml_emitter_t *emitter, int canonical); /** * Set the indentation increment. * * @param[in,out] emitter An emitter object. * @param[in] indent The indentation increment (1 < . < 10). */ YAML_DECLARE(void) yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent); /** * Set the preferred line width. @c -1 means unlimited. * * @param[in,out] emitter An emitter object. * @param[in] width The preferred line width. */ YAML_DECLARE(void) yaml_emitter_set_width(yaml_emitter_t *emitter, int width); /** * Set if unescaped non-ASCII characters are allowed. * * @param[in,out] emitter An emitter object. * @param[in] unicode If unescaped Unicode characters are allowed. */ YAML_DECLARE(void) yaml_emitter_set_unicode(yaml_emitter_t *emitter, int unicode); /** * Set the preferred line break. * * @param[in,out] emitter An emitter object. * @param[in] line_break The preferred line break. */ YAML_DECLARE(void) yaml_emitter_set_break(yaml_emitter_t *emitter, yaml_break_t line_break); /** * Emit an event. * * The event object may be generated using the yaml_parser_parse() function. * The emitter takes the responsibility for the event object and destroys its * content after it is emitted. The event object is destroyed even if the * function fails. * * @param[in,out] emitter An emitter object. * @param[in,out] event An event object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event); /** * Start a YAML stream. * * This function should be used before yaml_emitter_dump() is called. * * @param[in,out] emitter An emitter object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_emitter_open(yaml_emitter_t *emitter); /** * Finish a YAML stream. * * This function should be used after yaml_emitter_dump() is called. * * @param[in,out] emitter An emitter object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_emitter_close(yaml_emitter_t *emitter); /** * Emit a YAML document. * * The documen object may be generated using the yaml_parser_load() function * or the yaml_document_initialize() function. The emitter takes the * responsibility for the document object and destroys its content after * it is emitted. The document object is destroyed even if the function fails. * * @param[in,out] emitter An emitter object. * @param[in,out] document A document object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document); /** * Flush the accumulated characters to the output. * * @param[in,out] emitter An emitter object. * * @returns @c 1 if the function succeeded, @c 0 on error. */ YAML_DECLARE(int) yaml_emitter_flush(yaml_emitter_t *emitter); /** @} */ #ifdef __cplusplus } #endif #endif /* #ifndef YAML_H */