/* markdown • parses the input buffer and renders it into the output buffer */
void
markdown(struct buf *ob, struct buf *ib, const struct mkd_renderer *rndrer) {
struct link_ref *lr;
struct buf *text = bufnew(TEXT_UNIT);
size_t i, beg, end;
struct render rndr;
/* filling the render structure */
if (!rndrer) return;
rndr.make = *rndrer;
if (rndr.make.max_work_stack < 1)
rndr.make.max_work_stack = 1;
arr_init(&rndr.refs, sizeof (struct link_ref));
parr_init(&rndr.work);
for (i = 0; i < 256; i += 1) rndr.active_char[i] = 0;
if ((rndr.make.emphasis || rndr.make.double_emphasis
|| rndr.make.triple_emphasis)
&& rndr.make.emph_chars)
for (i = 0; rndr.make.emph_chars[i]; i += 1)
rndr.active_char[(unsigned char)rndr.make.emph_chars[i]]
= char_emphasis;
if (rndr.make.codespan) rndr.active_char['`'] = char_codespan;
if (rndr.make.linebreak) rndr.active_char['\n'] = char_linebreak;
if (rndr.make.image || rndr.make.link)
rndr.active_char['['] = char_link;
rndr.active_char['<'] = char_langle_tag;
rndr.active_char['\\'] = char_escape;
rndr.active_char['&'] = char_entity;
/* first pass: looking for references, copying everything else */
beg = 0;
while (beg < ib->size) /* iterating over lines */
if (is_ref(ib->data, beg, ib->size, &end, &rndr.refs))
beg = end;
else { /* skipping to the next line */
end = beg;
while (end < ib->size
&& ib->data[end] != '\n' && ib->data[end] != '\r')
end += 1;
/* adding the line body if present */
if (end > beg) bufput(text, ib->data + beg, end - beg);
while (end < ib->size
&& (ib->data[end] == '\n' || ib->data[end] == '\r')) {
/* add one \n per newline */
if (ib->data[end] == '\n'
|| (end + 1 < ib->size
&& ib->data[end + 1] != '\n'))
bufputc(text, '\n');
end += 1; }
beg = end; }
/* sorting the reference array */
if (rndr.refs.size)
qsort(rndr.refs.base, rndr.refs.size, rndr.refs.unit,
cmp_link_ref_sort);
/* adding a final newline if not already present */
if (text->size
&& text->data[text->size - 1] != '\n'
&& text->data[text->size - 1] != '\r')
bufputc(text, '\n');
/* second pass: actual rendering */
if (rndr.make.prolog)
rndr.make.prolog(ob, rndr.make.opaque);
parse_block(ob, &rndr, text->data, text->size);
if (rndr.make.epilog)
rndr.make.epilog(ob, rndr.make.opaque);
/* clean-up */
bufrelease(text);
lr = rndr.refs.base;
for (i = 0; i < rndr.refs.size; i += 1) {
bufrelease(lr[i].id);
bufrelease(lr[i].link);
bufrelease(lr[i].title); }
arr_free(&rndr.refs);
assert(rndr.work.size == 0);
for (i = 0; i < rndr.work.asize; i += 1)
bufrelease(rndr.work.item[i]);
parr_free(&rndr.work); }
/* markdown • parses the input buffer and renders it into the output buffer */
void
ups_markdown(struct buf *ob, struct buf *ib, const struct mkd_renderer *rndrer, unsigned int extensions) {
struct link_ref *lr;
struct buf *text;
size_t i, beg, end;
struct render rndr;
/* filling the render structure */
if (!rndrer)
return;
text = bufnew(TEXT_UNIT);
if (!text)
return;
rndr.make = *rndrer;
arr_init(&rndr.refs, sizeof (struct link_ref));
parr_init(&rndr.work);
for (i = 0; i < 256; i += 1)
rndr.active_char[i] = 0;
if (rndr.make.emphasis || rndr.make.double_emphasis || rndr.make.triple_emphasis) {
rndr.active_char['*'] = char_emphasis;
rndr.active_char['_'] = char_emphasis;
if (extensions & MKDEXT_STRIKETHROUGH)
rndr.active_char['~'] = char_emphasis;
}
if (rndr.make.codespan)
rndr.active_char['`'] = char_codespan;
if (rndr.make.linebreak)
rndr.active_char['\n'] = char_linebreak;
if (rndr.make.image || rndr.make.link)
rndr.active_char['['] = char_link;
rndr.active_char['<'] = char_langle_tag;
rndr.active_char['\\'] = char_escape;
rndr.active_char['&'] = char_entity;
if (extensions & MKDEXT_AUTOLINK) {
rndr.active_char['h'] = char_autolink; // http, https
rndr.active_char['H'] = char_autolink;
rndr.active_char['f'] = char_autolink; // ftp
rndr.active_char['F'] = char_autolink;
rndr.active_char['m'] = char_autolink; // mailto
rndr.active_char['M'] = char_autolink;
}
/* Extension data */
rndr.ext_flags = extensions;
rndr.max_nesting = 16;
/* first pass: looking for references, copying everything else */
beg = 0;
while (beg < ib->size) /* iterating over lines */
if (is_ref(ib->data, beg, ib->size, &end, &rndr.refs))
beg = end;
else { /* skipping to the next line */
end = beg;
while (end < ib->size && ib->data[end] != '\n' && ib->data[end] != '\r')
end += 1;
/* adding the line body if present */
if (end > beg)
expand_tabs(text, ib->data + beg, end - beg);
while (end < ib->size && (ib->data[end] == '\n' || ib->data[end] == '\r')) {
/* add one \n per newline */
if (ib->data[end] == '\n' || (end + 1 < ib->size && ib->data[end + 1] != '\n'))
bufputc(text, '\n');
end += 1;
}
beg = end;
}
/* sorting the reference array */
if (rndr.refs.size)
qsort(rndr.refs.base, rndr.refs.size, rndr.refs.unit, cmp_link_ref_sort);
/* adding a final newline if not already present */
if (!text->size)
goto cleanup;
if (text->data[text->size - 1] != '\n' && text->data[text->size - 1] != '\r')
bufputc(text, '\n');
/* second pass: actual rendering */
if (rndr.make.doc_header)
rndr.make.doc_header(ob, rndr.make.opaque);
parse_block(ob, &rndr, text->data, text->size);
if (rndr.make.doc_footer)
rndr.make.doc_footer(ob, rndr.make.opaque);
/* clean-up */
cleanup:
bufrelease(text);
lr = rndr.refs.base;
for (i = 0; i < (size_t)rndr.refs.size; i += 1) {
bufrelease(lr[i].id);
bufrelease(lr[i].link);
bufrelease(lr[i].title);
}
arr_free(&rndr.refs);
assert(rndr.work.size == 0);
for (i = 0; i < (size_t)rndr.work.asize; i += 1)
bufrelease(rndr.work.item[i]);
parr_free(&rndr.work);
}