src/ast.h



#ifndef CMARK_AST_H
#define CMARK_AST_H

#include <stdio.h>
#include "config.h"
#include "buffer.h"
#include "chunk.h"
#include "cmark.h"

#ifdef __cplusplus
extern "C" {
#endif

#define CMARK_VERSION "0.1"
#define CMARK_CODE_INDENT 4
#define REFMAP_SIZE 16
#define CMARK_MAX_LINK_LABEL_LENGTH 1000

typedef enum {
    CMARK_INL_STRING,
    CMARK_INL_SOFTBREAK,
    CMARK_INL_LINEBREAK,
    CMARK_INL_CODE,
    CMARK_INL_RAW_HTML,
    CMARK_INL_EMPH,
    CMARK_INL_STRONG,
    CMARK_INL_LINK,
    CMARK_INL_IMAGE
} cmark_inl_tag;

struct cmark_node_inl {
    cmark_inl_tag tag;
    union {
        cmark_chunk literal;
        struct cmark_node_inl *inlines;
        struct {
            struct cmark_node_inl *label;
            unsigned char *url;
            unsigned char *title;
        } linkable;
    } content;
    struct cmark_node_inl *next;
};

struct cmark_reference {
    struct cmark_reference *next;
    unsigned char *label;
    unsigned char *url;
    unsigned char *title;
    unsigned int hash;
};

typedef struct cmark_reference cmark_reference;

struct cmark_reference_map {
    cmark_reference *table[REFMAP_SIZE];
};

typedef struct cmark_reference_map cmark_reference_map;

typedef enum {
    bullet,
    ordered
}  cmark_list_type;

typedef enum {
    period,
    parens
} cmark_delim_type;

// Types for blocks
struct cmark_ListData {
    cmark_list_type   list_type;
    int               marker_offset;
    int               padding;
    int               start;
    cmark_delim_type  delimiter;
    unsigned char     bullet_char;
    bool              tight;
};

struct cmark_FencedCodeData {
    int               fence_length;
    int               fence_offset;
    unsigned char     fence_char;
    cmark_strbuf      info;
};

typedef enum {
    CMARK_BLOCK_DOCUMENT,
    CMARK_BLOCK_BQUOTE,
    CMARK_BLOCK_LIST,
    CMARK_BLOCK_LIST_ITEM,
    CMARK_BLOCK_FENCED_CODE,
    CMARK_BLOCK_INDENTED_CODE,
    CMARK_BLOCK_HTML,
    CMARK_BLOCK_PARAGRAPH,
    CMARK_BLOCK_ATX_HEADER,
    CMARK_BLOCK_SETEXT_HEADER,
    CMARK_BLOCK_HRULE,
    CMARK_BLOCK_REFERENCE_DEF
} cmark_block_tag;

struct cmark_node_block {
    cmark_block_tag tag;
    int start_line;
    int start_column;
    int end_line;
    bool open;
    bool last_line_blank;
    struct cmark_node_block* children;
    struct cmark_node_block* last_child;
    struct cmark_node_block* parent;
    struct cmark_node_block* top;
    cmark_strbuf string_content;
    struct cmark_node_inl* inline_content;

    union  {
        struct cmark_ListData list;
        struct cmark_FencedCodeData code;
        struct {
            int level;
        } header;
        struct {
            cmark_reference_map *refmap;
        } document;
    } as;

    struct cmark_node_block *next;
    struct cmark_node_block *prev;
};

struct cmark_doc_parser {
    struct cmark_node_block* head;
    struct cmark_node_block* current;
    int line_number;
    cmark_strbuf *curline;
};

unsigned char *cmark_clean_autolink(chunk *url, int is_email);

static inline cmark_node_inl *cmark_make_link(cmark_node_inl *label, unsigned char *url, unsigned char *title)
{
    cmark_node_inl* e = (cmark_node_inl *)calloc(1, sizeof(*e));
    if(e != NULL) {
        e->tag = CMARK_INL_LINK;
        e->content.linkable.label = label;
        e->content.linkable.url   = url;
        e->content.linkable.title = title;
        e->next = NULL;
    }
    return e;
}

static inline cmark_node_inl* cmark_make_autolink(cmark_node_inl* label, cmark_chunk url, int is_email)
{
    return cmark_make_link(label, cmark_clean_autolink(&url, is_email), NULL);
}

static inline cmark_node_inl* cmark_make_inlines(cmark_inl_tag t, cmark_node_inl* contents)
{
    cmark_node_inl * e = (cmark_node_inl *)calloc(1, sizeof(*e));
    if(e != NULL) {
        e->tag = t;
        e->content.inlines = contents;
        e->next = NULL;
    }
    return e;
}

// Create an inline with a literal string value.
static inline cmark_node_inl* cmark_make_literal(cmark_inl_tag t, cmark_chunk s)
{
    cmark_node_inl * e = (cmark_node_inl *)calloc(1, sizeof(*e));
    if(e != NULL) {
        e->tag = t;
        e->content.literal = s;
        e->next = NULL;
    }
    return e;
}

// Create an inline with no value.
static inline cmark_node_inl* cmark_make_simple(cmark_inl_tag t)
{
    cmark_node_inl* e = (cmark_node_inl *)calloc(1, sizeof(*e));
    if(e != NULL) {
        e->tag = t;
        e->next = NULL;
    }
    return e;
}

// Macros for creating various kinds of simple.
#define cmark_make_str(s) cmark_make_literal(INL_STRING, s)
#define cmark_make_code(s) cmark_make_literal(INL_CODE, s)
#define cmark_make_raw_html(s) cmark_make_literal(INL_RAW_HTML, s)
#define cmark_make_linebreak() cmark_make_simple(INL_LINEBREAK)
#define cmark_make_softbreak() cmark_make_simple(INL_SOFTBREAK)
#define cmark_make_emph(contents) cmark_make_inlines(INL_EMPH, contents)
#define cmark_make_strong(contents) cmark_make_inlines(INL_STRONG, contents)


#ifndef CMARK_NO_SHORT_NAMES
  #define node_inl                  cmark_node_inl
  #define INL_STRING                CMARK_INL_STRING
  #define INL_SOFTBREAK             CMARK_INL_SOFTBREAK
  #define INL_LINEBREAK             CMARK_INL_LINEBREAK
  #define INL_CODE                  CMARK_INL_CODE
  #define INL_RAW_HTML              CMARK_INL_RAW_HTML
  #define INL_EMPH                  CMARK_INL_EMPH
  #define INL_STRONG                CMARK_INL_STRONG
  #define INL_LINK                  CMARK_INL_LINK
  #define INL_IMAGE                 CMARK_INL_IMAGE
  #define ListData                  cmark_ListData
  #define FencedCodeData            cmark_FencedCodeData
  #define node_block                cmark_node_block
  #define BLOCK_DOCUMENT            CMARK_BLOCK_DOCUMENT
  #define BLOCK_BQUOTE              CMARK_BLOCK_BQUOTE
  #define BLOCK_LIST                CMARK_BLOCK_LIST
  #define BLOCK_LIST_ITEM           CMARK_BLOCK_LIST_ITEM
  #define BLOCK_FENCED_CODE         CMARK_BLOCK_FENCED_CODE
  #define BLOCK_INDENTED_CODE       CMARK_BLOCK_INDENTED_CODE
  #define BLOCK_HTML                CMARK_BLOCK_HTML
  #define BLOCK_PARAGRAPH           CMARK_BLOCK_PARAGRAPH
  #define BLOCK_ATX_HEADER          CMARK_BLOCK_ATX_HEADER
  #define BLOCK_SETEXT_HEADER       CMARK_BLOCK_SETEXT_HEADER
  #define BLOCK_HRULE               CMARK_BLOCK_HRULE
  #define BLOCK_REFERENCE_DEF       CMARK_BLOCK_REFERENCE_DEF
  #define make_link                 cmark_make_link
  #define make_autolink             cmark_make_autolink
  #define make_str                  cmark_make_str
  #define make_code                 cmark_make_code
  #define make_raw_html             cmark_make_raw_html
  #define make_linebreak            cmark_make_linebreak
  #define make_softbreak            cmark_make_softbreak
  #define make_emph                 cmark_make_emph
  #define make_strong               cmark_make_strong
  #define make_simple               cmark_make_simple
  #define make_literal              cmark_make_literal
  #define make_inlines              cmark_make_inlines
#endif

#ifdef __cplusplus
}
#endif

#endif