path: root/src/stmd.h

#ifndef _STDMD_H_
#define _STDMD_H_

#include <stdbool.h>
#include <stdio.h>
#include "buffer.h"
#include "chunk.h"
#include "uthash.h"

#define VERSION "0.1"
#define CODE_INDENT 4

struct node_inl {
    enum {
        INL_STRING,
        INL_SOFTBREAK,
        INL_LINEBREAK,
        INL_CODE,
        INL_RAW_HTML,
        INL_ENTITY,
        INL_EMPH,
        INL_STRONG,
        INL_LINK,
        INL_IMAGE
    } tag;
    union {
        chunk literal;
        struct node_inl *inlines;
        struct {
            struct node_inl *label;
            unsigned char *url;
            unsigned char *title;
        } linkable;
    } content;
    struct node_inl *next;
};

typedef struct node_inl node_inl;

struct reference {
  unsigned char *label;
  unsigned char *url;
  unsigned char *title;
  UT_hash_handle  hh; // used by uthash
};

typedef struct reference reference;

// Types for blocks

struct ListData {
  enum { bullet,
         ordered }  list_type;
  int               marker_offset;
  int               padding;
  int               start;
  enum { period,
         parens }   delimiter;
  unsigned char     bullet_char;
  bool              tight;
};

struct FencedCodeData {
  int               fence_length;
  int               fence_offset;
  char              fence_char;
  strbuf            info;
};

typedef struct Block {
  enum { BLOCK_DOCUMENT,
         BLOCK_BQUOTE,
         BLOCK_LIST,
         BLOCK_LIST_ITEM,
         BLOCK_FENCED_CODE,
         BLOCK_INDENTED_CODE,
         BLOCK_HTML,
         BLOCK_PARAGRAPH,
         BLOCK_ATX_HEADER,
         BLOCK_SETEXT_HEADER,
         BLOCK_HRULE,
         BLOCK_REFERENCE_DEF
  }                  tag;
  int                start_line;
  int                start_column;
  int                end_line;
  bool               open;
  bool               last_line_blank;
  struct Block*      children;
  struct Block*      last_child;
  struct Block*      parent;
  struct Block*      top;
  strbuf             string_content;
  node_inl*               inline_content;
  union  {
    struct ListData       list_data;
    struct FencedCodeData fenced_code_data;
    int                   header_level;
    reference**           refmap;
    }                     attributes;
  struct Block *     next;
  struct Block *     prev;
} node_block;

node_inl* parse_inlines(strbuf *input, reference** refmap);
void free_inlines(node_inl* e);

int parse_reference(strbuf *input, reference** refmap);
void free_reference(reference *ref);
void free_reference_map(reference **refmap);

void add_reference(reference** refmap, reference* ref);
void unescape_buffer(strbuf *buf);

extern node_block* make_document();
extern node_block* add_child(node_block* parent,
                        int block_type, int start_line, int start_column);
void free_blocks(node_block* e);

extern node_block *stmd_parse_document(const unsigned char *buffer, size_t len);
extern node_block *stmd_parse_file(FILE *f);

void print_inlines(node_inl* ils, int indent);
void print_blocks(node_block* blk, int indent);

void blocks_to_html(strbuf *html, node_block *b, bool tight);
void inlines_to_html(strbuf *html, node_inl *b);

void utf8proc_case_fold(strbuf *dest, const unsigned char *str, int len);

#endif