/* closed by a symbol not preceded by whitespace and not followed by symbol */
static size_t
parse_emph1(struct buf *ob, struct render *rndr,
char *data, size_t size, char c) {
size_t i = 0, len;
struct buf *work = 0;
int r;
if (!rndr->make.emphasis) return 0;
/* skipping one symbol if coming from emph3 */
if (size > 1 && data[0] == c && data[1] == c) i = 1;
while (i < size) {
len = find_emph_char(data + i, size - i, c);
if (!len) return 0;
i += len;
if (i >= size) return 0;
if (i + 1 < size && data[i + 1] == c) {
i += 1;
continue; }
if (data[i] == c && data[i - 1] != ' '
&& data[i - 1] != '\t' && data[i - 1] != '\n') {
work = new_work_buffer(rndr);
parse_inline(work, rndr, data, i);
r = rndr->make.emphasis(ob, work, c, rndr->make.opaque);
release_work_buffer(rndr, work);
return r ? i + 1 : 0; } }
return 0; }
/* parse_emph2 • parsing single emphase */
static size_t
parse_emph2(struct buf *ob, struct render *rndr, char *data, size_t size, char c)
{
int (*render_method)(struct buf *ob, struct buf *text, void *opaque);
size_t i = 0, len;
struct buf *work = 0;
int r;
render_method = (c == '~') ? rndr->make.strikethrough : rndr->make.double_emphasis;
if (!render_method)
return 0;
while (i < size) {
len = find_emph_char(data + i, size - i, c);
if (!len) return 0;
i += len;
if (i + 1 < size && data[i] == c && data[i + 1] == c && i && !isspace(data[i - 1])) {
work = rndr_newbuf(rndr);
parse_inline(work, rndr, data, i);
r = render_method(ob, work, rndr->make.opaque);
rndr_popbuf(rndr);
return r ? i + 2 : 0;
}
i++;
}
return 0;
}
/* closed by a symbol not preceded by whitespace and not followed by symbol */
static size_t
parse_emph1(struct buf *ob, struct render *rndr, char *data, size_t size, char c)
{
size_t i = 0, len;
struct buf *work = 0;
int r;
if (!rndr->make.emphasis) return 0;
/* skipping one symbol if coming from emph3 */
if (size > 1 && data[0] == c && data[1] == c) i = 1;
while (i < size) {
len = find_emph_char(data + i, size - i, c);
if (!len) return 0;
i += len;
if (i >= size) return 0;
if (i + 1 < size && data[i + 1] == c) {
i += 1;
continue;
}
if (data[i] == c && !isspace(data[i - 1])) {
if ((rndr->ext_flags & MKDEXT_LAX_EMPHASIS) == 0) {
if (!(i + 1 == size || isspace(data[i + 1]) || ispunct(data[i + 1])))
continue;
}
work = rndr_newbuf(rndr);
parse_inline(work, rndr, data, i);
r = rndr->make.emphasis(ob, work, rndr->make.opaque);
rndr_popbuf(rndr);
return r ? i + 1 : 0;
}
}
return 0;
}
/* finds the first closing tag, and delegates to the other emph */
static size_t
parse_emph3(struct buf *ob, struct render *rndr, char *data, size_t size, char c)
{
size_t i = 0, len;
int r;
while (i < size) {
len = find_emph_char(data + i, size - i, c);
if (!len) return 0;
i += len;
/* skip whitespace preceded symbols */
if (data[i] != c || isspace(data[i - 1]))
continue;
if (i + 2 < size && data[i + 1] == c && data[i + 2] == c && rndr->make.triple_emphasis) {
/* triple symbol found */
struct buf *work = rndr_newbuf(rndr);
parse_inline(work, rndr, data, i);
r = rndr->make.triple_emphasis(ob, work, rndr->make.opaque);
rndr_popbuf(rndr);
return r ? i + 3 : 0;
} else if (i + 1 < size && data[i + 1] == c) {
/* double symbol found, handing over to emph1 */
len = parse_emph1(ob, rndr, data - 2, size + 2, c);
if (!len) return 0;
else return len - 2;
} else {
/* single symbol found, handing over to emph2 */
len = parse_emph2(ob, rndr, data - 1, size + 1, c);
if (!len) return 0;
else return len - 1;
}
}
return 0;
}
/* parse_emph2 • parsing single emphase */
static size_t
parse_emph2(struct buf *ob, struct render *rndr,
char *data, size_t size, char c) {
size_t i = 0, len;
struct buf *work = 0;
int r;
if (!rndr->make.double_emphasis) return 0;
while (i < size) {
len = find_emph_char(data + i, size - i, c);
if (!len) return 0;
i += len;
if (i + 1 < size && data[i] == c && data[i + 1] == c
&& i && data[i - 1] != ' '
&& data[i - 1] != '\t' && data[i - 1] != '\n') {
work = new_work_buffer(rndr);
parse_inline(work, rndr, data, i);
r = rndr->make.double_emphasis(ob, work, c,
rndr->make.opaque);
release_work_buffer(rndr, work);
return r ? i + 2 : 0; }
i += 1; }
return 0; }
