#ifndef _YAML_H
#define _YAML_H

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    YAML_READER_ERROR,
    YAML_SCANNER_ERROR,
    YAML_PARSER_ERROR,
    YAML_EMITTER_ERROR
} yaml_error_type_t;

typedef enum {
    YAML_UTF8_ENCODING,
    YAML_UTF16LE_ENCODING,
    YAML_UTF16BE_ENCODING
} yaml_encoding_t;

typedef enum {
    YAML_PLAIN_SCALAR_STYLE,
    YAML_SINGLE_QUOTED_SCALAR_STYLE,
    YAML_DOUBLE_QUOTED_SCALAR_STYLE,
    YAML_LITERAL_SCALAR_STYLE,
    YAML_FOLDED_SCALAR_STYLE
} yaml_scalar_style_t;

typedef enum {
    YAML_BLOCK_SEQUENCE_STYLE,
    YAML_FLOW_SEQUENCE_STYLE
} yaml_sequence_style_t;

typedef enum {
    YAML_BLOCK_MAPPING_STYLE,
    YAML_FLOW_MAPPING_STYLE
} yaml_mapping_style_t;

typedef enum {
    YAML_STREAM_START_TOKEN,
    YAML_STREAM_END_TOKEN,
    YAML_VERSION_DIRECTIVE_TOKEN,
    YAML_TAG_DIRECTIVE_TOKEN,
    YAML_DOCUMENT_START_TOKEN,
    YAML_DOCUMENT_END_TOKEN,
    YAML_BLOCK_SEQUENCE_START_TOKEN,
    YAML_BLOCK_MAPPING_START_TOKEN,
    YAML_BLOCK_END_TOKEN,
    YAML_FLOW_SEQUENCE_START_TOKEN,
    YAML_FLOW_SEQUENCE_END_TOKEN,
    YAML_FLOW_MAPPING_START_TOKEN,
    YAML_FLOW_MAPPING_END_TOKEN,
    YAML_BLOCK_ENTRY_TOKEN,
    YAML_FLOW_ENTRY_TOKEN,
    YAML_KEY_TOKEN,
    YAML_VALUE_TOKEN,
    YAML_ALIAS_TOKEN,
    YAML_ANCHOR_TOKEN,
    YAML_TAG_TOKEN,
    YAML_SCALAR_TOKEN
} yaml_token_type_t;

typedef enum {
    YAML_STREAM_START_EVENT,
    YAML_STREAM_END_EVENT,
    YAML_DOCUMENT_START_EVENT,
    YAML_DOCUMENT_END_EVENT,
    YAML_ALIAS_EVENT,
    YAML_SEQUENCE_START_EVENT,
    YAML_SEQUENCE_END_EVENT,
    YAML_MAPPING_START_EVENT,
    YAML_MAPPING_END_EVENT,
    YAML_SCALAR_EVENT
} yaml_event_type_t;

typedef struct {
    char *value;
    size_t length;
} yaml_string_t;

typedef struct {
    size_t index;
    size_t line;
    size_t column;
} yaml_mark_t;

typedef struct {
    yaml_error_type_t type;
    char *context;
    yaml_mark_t context_mark;
    char *problem;
    yaml_mark_t problem_mark;
} yaml_error_t;

typedef struct {
    yaml_token_type_t type;
    union {
        yaml_encoding_t encoding;
        yaml_string_t anchor;
        yaml_string_t tag;
        struct {
            yaml_string_t value;
            yaml_scalar_style_t style;
        } scalar;
        struct {
            int major;
            int minor;
        } version;
        struct {
          yaml_string_t handle;
          yaml_string_t prefix;
        } tag_pair;
    } data;
    yaml_mark_t start_mark;
    yaml_mark_t end_mark;
} yaml_token_t;

typedef struct {
    yaml_event_type_t type;
    union {
        struct {
            yaml_encoding_t encoding;
        } stream_start;
        struct {
            struct {
                int major;
                int minor;
            } version;
            struct {
                yaml_string_t handle;
                yaml_string_t prefix;
            } **tag_pairs;
            int implicit;
        } document_start;
        struct {
            int implicit;
        } document_end;
        struct {
            yaml_string_t anchor;
        } alias;
        struct {
            yaml_string_t anchor;
            yaml_string_t tag;
            int plain_implicit;
            int quoted_implicit;
            yaml_scalar_style_t style;
        } scalar;
        struct {
            yaml_string_t anchor;
            yaml_string_t tag;
            int implicit;
            yaml_sequence_style_t style;
        } sequence_start;
        struct {
            yaml_string_t anchor;
            yaml_string_t tag;
            int implicit;
            yaml_mapping_style_t style;
        } mapping_start;
    } data;
    yaml_mark_t start_mark;
    yaml_mark_t end_mark;
} yaml_event_t;

typedef struct {
} yaml_scanner_t;

typedef struct {
} yaml_parser_t;

typedef struct {
} yaml_composer_t;

typedef struct {
} yaml_emitter_t;

typedef struct {
} yaml_serializer_t;

#ifdef __cplusplus
}
#endif

#endif /* #ifndef _YAML_H */