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/* parsing_functions.c - Functions for parsing markdown and
* freeing element lists. */
/* These yy_* functions come from markdown_parser.c which is
* generated from markdown_parser.leg
* */
typedef int (*yyrule)();
extern int yyparse();
extern int yyparsefrom(yyrule);
extern int yy_References();
extern int yy_Notes();
extern int yy_Doc();
#include "utility_functions.h"
#include "parsing_functions.h"
#include "markdown_peg.h"
static void free_element_contents(element elt);
/* free_element_list - free list of elements recursively */
void free_element_list(element * elt) {
element * next = NULL;
while (elt != NULL) {
next = elt->next;
free_element_contents(*elt);
if (elt->children != NULL) {
free_element_list(elt->children);
elt->children = NULL;
}
free(elt);
elt = next;
}
}
/* free_element_contents - free element contents depending on type */
static void free_element_contents(element elt) {
switch (elt.key) {
case STR:
case SPACE:
case RAW:
case HTMLBLOCK:
case HTML:
case VERBATIM:
case CODE:
case NOTE:
free(elt.contents.str);
elt.contents.str = NULL;
break;
case LINK:
case IMAGE:
case REFERENCE:
free(elt.contents.link->url);
elt.contents.link->url = NULL;
free(elt.contents.link->title);
elt.contents.link->title = NULL;
free_element_list(elt.contents.link->label);
free(elt.contents.link);
elt.contents.link = NULL;
break;
default:
;
}
}
/* free_element - free element and contents */
void free_element(element *elt) {
free_element_contents(*elt);
free(elt);
}
element * parse_references(char *string, int extensions) {
char *oldcharbuf;
syntax_extensions = extensions;
oldcharbuf = charbuf;
charbuf = string;
yyparsefrom(yy_References); /* first pass, just to collect references */
charbuf = oldcharbuf;
return references;
}
element * parse_notes(char *string, int extensions, element *reference_list) {
char *oldcharbuf;
notes = NULL;
syntax_extensions = extensions;
if (extension(EXT_NOTES)) {
references = reference_list;
oldcharbuf = charbuf;
charbuf = string;
yyparsefrom(yy_Notes); /* second pass for notes */
charbuf = oldcharbuf;
}
return notes;
}
element * parse_markdown(char *string, int extensions, element *reference_list, element *note_list) {
char *oldcharbuf;
syntax_extensions = extensions;
references = reference_list;
notes = note_list;
oldcharbuf = charbuf;
charbuf = string;
yyparsefrom(yy_Doc);
charbuf = oldcharbuf; /* restore charbuf to original value */
return parse_result;
}
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