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modules/CommonMark/src/inlines.c  view on Meta::CPAN

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "cmark_ctype.h"
#include "node.h"
#include "parser.h"
#include "references.h"
#include "cmark.h"
#include "houdini.h"
#include "utf8.h"
#include "scanners.h"
#include "inlines.h"

static const char *EMDASH = "\xE2\x80\x94";
static const char *ENDASH = "\xE2\x80\x93";
static const char *ELLIPSES = "\xE2\x80\xA6";
static const char *LEFTDOUBLEQUOTE = "\xE2\x80\x9C";
static const char *RIGHTDOUBLEQUOTE = "\xE2\x80\x9D";
static const char *LEFTSINGLEQUOTE = "\xE2\x80\x98";
static const char *RIGHTSINGLEQUOTE = "\xE2\x80\x99";

// Macros for creating various kinds of simple.
#define make_linebreak(mem) make_simple(mem, CMARK_NODE_LINEBREAK)
#define make_softbreak(mem) make_simple(mem, CMARK_NODE_SOFTBREAK)
#define make_emph(mem) make_simple(mem, CMARK_NODE_EMPH)
#define make_strong(mem) make_simple(mem, CMARK_NODE_STRONG)

#define MAXBACKTICKS 1000

typedef struct delimiter {
  struct delimiter *previous;
  struct delimiter *next;
  cmark_node *inl_text;
  bufsize_t position;
  bufsize_t length;
  unsigned char delim_char;
  bool can_open;
  bool can_close;
} delimiter;

typedef struct bracket {
  struct bracket *previous;
  cmark_node *inl_text;
  bufsize_t position;
  bool image;
  bool active;
  bool bracket_after;
} bracket;

#define FLAG_SKIP_HTML_CDATA        (1u << 0)
#define FLAG_SKIP_HTML_DECLARATION  (1u << 1)
#define FLAG_SKIP_HTML_PI           (1u << 2)
#define FLAG_SKIP_HTML_COMMENT      (1u << 3)

typedef struct {
  cmark_mem *mem;
  cmark_chunk input;
  unsigned flags;
  int line;
  bufsize_t pos;
  int block_offset;
  int column_offset;
  cmark_reference_map *refmap;
  delimiter *last_delim;
  bracket *last_bracket;
  bufsize_t backticks[MAXBACKTICKS + 1];
  bool scanned_for_backticks;
  bool no_link_openers;
} subject;

static inline bool S_is_line_end_char(char c) {
  return (c == '\n' || c == '\r');
}

static delimiter *S_insert_emph(subject *subj, delimiter *opener,
                                delimiter *closer);

static int parse_inline(subject *subj, cmark_node *parent, int options);

static void subject_from_buf(cmark_mem *mem, int line_number, int block_offset, subject *e,
                             cmark_chunk *chunk, cmark_reference_map *refmap);
static bufsize_t subject_find_special_char(subject *subj, int options);