intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 1987 insertions, 0 deletions

diff --git a/contrib/libs/yaml/include/yaml.h b/contrib/libs/yaml/include/yaml.h
new file mode 100644
index 0000000000..7ccd5ed97a
--- /dev/null
+++ b/contrib/libs/yaml/include/yaml.h
@@ -0,0 +1,1987 @@
+/**
+ * @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. */
+
+#define YAML_DECLARE_STATIC
+
+#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 */
+