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-rw-r--r--depends/hoedown/src/document.c2958
1 files changed, 0 insertions, 2958 deletions
diff --git a/depends/hoedown/src/document.c b/depends/hoedown/src/document.c
deleted file mode 100644
index 8ba82e47..00000000
--- a/depends/hoedown/src/document.c
+++ /dev/null
@@ -1,2958 +0,0 @@
-#include "hoedown/document.h"
-
-#include <assert.h>
-#include <string.h>
-#include <ctype.h>
-#include <stdio.h>
-
-#include "hoedown/stack.h"
-
-#ifndef _MSC_VER
-#include <strings.h>
-#else
-#define strncasecmp _strnicmp
-#endif
-
-#define REF_TABLE_SIZE 8
-
-#define BUFFER_BLOCK 0
-#define BUFFER_SPAN 1
-
-#define HOEDOWN_LI_END 8 /* internal list flag */
-
-const char *hoedown_find_block_tag(const char *str, unsigned int len);
-
-/***************
- * LOCAL TYPES *
- ***************/
-
-/* link_ref: reference to a link */
-struct link_ref {
- unsigned int id;
-
- hoedown_buffer *link;
- hoedown_buffer *title;
-
- struct link_ref *next;
-};
-
-/* footnote_ref: reference to a footnote */
-struct footnote_ref {
- unsigned int id;
-
- int is_used;
- unsigned int num;
-
- hoedown_buffer *contents;
-};
-
-/* footnote_item: an item in a footnote_list */
-struct footnote_item {
- struct footnote_ref *ref;
- struct footnote_item *next;
-};
-
-/* footnote_list: linked list of footnote_item */
-struct footnote_list {
- unsigned int count;
- struct footnote_item *head;
- struct footnote_item *tail;
-};
-
-/* char_trigger: function pointer to render active chars */
-/* returns the number of chars taken care of */
-/* data is the pointer of the beginning of the span */
-/* offset is the number of valid chars before data */
-typedef size_t
-(*char_trigger)(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-
-static size_t char_emphasis(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_quote(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_linebreak(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_codespan(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_escape(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_entity(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_langle_tag(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_autolink_url(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_autolink_email(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_autolink_www(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_link(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_superscript(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-static size_t char_math(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
-
-enum markdown_char_t {
- MD_CHAR_NONE = 0,
- MD_CHAR_EMPHASIS,
- MD_CHAR_CODESPAN,
- MD_CHAR_LINEBREAK,
- MD_CHAR_LINK,
- MD_CHAR_LANGLE,
- MD_CHAR_ESCAPE,
- MD_CHAR_ENTITY,
- MD_CHAR_AUTOLINK_URL,
- MD_CHAR_AUTOLINK_EMAIL,
- MD_CHAR_AUTOLINK_WWW,
- MD_CHAR_SUPERSCRIPT,
- MD_CHAR_QUOTE,
- MD_CHAR_MATH
-};
-
-static char_trigger markdown_char_ptrs[] = {
- NULL,
- &char_emphasis,
- &char_codespan,
- &char_linebreak,
- &char_link,
- &char_langle_tag,
- &char_escape,
- &char_entity,
- &char_autolink_url,
- &char_autolink_email,
- &char_autolink_www,
- &char_superscript,
- &char_quote,
- &char_math
-};
-
-struct hoedown_document {
- hoedown_renderer md;
- hoedown_renderer_data data;
-
- struct link_ref *refs[REF_TABLE_SIZE];
- struct footnote_list footnotes_found;
- struct footnote_list footnotes_used;
- uint8_t active_char[256];
- hoedown_stack work_bufs[2];
- hoedown_extensions ext_flags;
- size_t max_nesting;
- int in_link_body;
-};
-
-/***************************
- * HELPER FUNCTIONS *
- ***************************/
-
-static hoedown_buffer *
-newbuf(hoedown_document *doc, int type)
-{
- static const size_t buf_size[2] = {256, 64};
- hoedown_buffer *work = NULL;
- hoedown_stack *pool = &doc->work_bufs[type];
-
- if (pool->size < pool->asize &&
- pool->item[pool->size] != NULL) {
- work = pool->item[pool->size++];
- work->size = 0;
- } else {
- work = hoedown_buffer_new(buf_size[type]);
- hoedown_stack_push(pool, work);
- }
-
- return work;
-}
-
-static void
-popbuf(hoedown_document *doc, int type)
-{
- doc->work_bufs[type].size--;
-}
-
-static void
-unscape_text(hoedown_buffer *ob, hoedown_buffer *src)
-{
- size_t i = 0, org;
- while (i < src->size) {
- org = i;
- while (i < src->size && src->data[i] != '\\')
- i++;
-
- if (i > org)
- hoedown_buffer_put(ob, src->data + org, i - org);
-
- if (i + 1 >= src->size)
- break;
-
- hoedown_buffer_putc(ob, src->data[i + 1]);
- i += 2;
- }
-}
-
-static unsigned int
-hash_link_ref(const uint8_t *link_ref, size_t length)
-{
- size_t i;
- unsigned int hash = 0;
-
- for (i = 0; i < length; ++i)
- hash = tolower(link_ref[i]) + (hash << 6) + (hash << 16) - hash;
-
- return hash;
-}
-
-static struct link_ref *
-add_link_ref(
- struct link_ref **references,
- const uint8_t *name, size_t name_size)
-{
- struct link_ref *ref = hoedown_calloc(1, sizeof(struct link_ref));
-
- ref->id = hash_link_ref(name, name_size);
- ref->next = references[ref->id % REF_TABLE_SIZE];
-
- references[ref->id % REF_TABLE_SIZE] = ref;
- return ref;
-}
-
-static struct link_ref *
-find_link_ref(struct link_ref **references, uint8_t *name, size_t length)
-{
- unsigned int hash = hash_link_ref(name, length);
- struct link_ref *ref = NULL;
-
- ref = references[hash % REF_TABLE_SIZE];
-
- while (ref != NULL) {
- if (ref->id == hash)
- return ref;
-
- ref = ref->next;
- }
-
- return NULL;
-}
-
-static void
-free_link_refs(struct link_ref **references)
-{
- size_t i;
-
- for (i = 0; i < REF_TABLE_SIZE; ++i) {
- struct link_ref *r = references[i];
- struct link_ref *next;
-
- while (r) {
- next = r->next;
- hoedown_buffer_free(r->link);
- hoedown_buffer_free(r->title);
- free(r);
- r = next;
- }
- }
-}
-
-static struct footnote_ref *
-create_footnote_ref(struct footnote_list *list, const uint8_t *name, size_t name_size)
-{
- struct footnote_ref *ref = hoedown_calloc(1, sizeof(struct footnote_ref));
-
- ref->id = hash_link_ref(name, name_size);
-
- return ref;
-}
-
-static int
-add_footnote_ref(struct footnote_list *list, struct footnote_ref *ref)
-{
- struct footnote_item *item = hoedown_calloc(1, sizeof(struct footnote_item));
- if (!item)
- return 0;
- item->ref = ref;
-
- if (list->head == NULL) {
- list->head = list->tail = item;
- } else {
- list->tail->next = item;
- list->tail = item;
- }
- list->count++;
-
- return 1;
-}
-
-static struct footnote_ref *
-find_footnote_ref(struct footnote_list *list, uint8_t *name, size_t length)
-{
- unsigned int hash = hash_link_ref(name, length);
- struct footnote_item *item = NULL;
-
- item = list->head;
-
- while (item != NULL) {
- if (item->ref->id == hash)
- return item->ref;
- item = item->next;
- }
-
- return NULL;
-}
-
-static void
-free_footnote_ref(struct footnote_ref *ref)
-{
- hoedown_buffer_free(ref->contents);
- free(ref);
-}
-
-static void
-free_footnote_list(struct footnote_list *list, int free_refs)
-{
- struct footnote_item *item = list->head;
- struct footnote_item *next;
-
- while (item) {
- next = item->next;
- if (free_refs)
- free_footnote_ref(item->ref);
- free(item);
- item = next;
- }
-}
-
-
-/*
- * Check whether a char is a Markdown spacing char.
-
- * Right now we only consider spaces the actual
- * space and a newline: tabs and carriage returns
- * are filtered out during the preprocessing phase.
- *
- * If we wanted to actually be UTF-8 compliant, we
- * should instead extract an Unicode codepoint from
- * this character and check for space properties.
- */
-static int
-_isspace(int c)
-{
- return c == ' ' || c == '\n';
-}
-
-/* is_empty_all: verify that all the data is spacing */
-static int
-is_empty_all(const uint8_t *data, size_t size)
-{
- size_t i = 0;
- while (i < size && _isspace(data[i])) i++;
- return i == size;
-}
-
-/*
- * Replace all spacing characters in data with spaces. As a special
- * case, this collapses a newline with the previous space, if possible.
- */
-static void
-replace_spacing(hoedown_buffer *ob, const uint8_t *data, size_t size)
-{
- size_t i = 0, mark;
- hoedown_buffer_grow(ob, size);
- while (1) {
- mark = i;
- while (i < size && data[i] != '\n') i++;
- hoedown_buffer_put(ob, data + mark, i - mark);
-
- if (i >= size) break;
-
- if (!(i > 0 && data[i-1] == ' '))
- hoedown_buffer_putc(ob, ' ');
- i++;
- }
-}
-
-/****************************
- * INLINE PARSING FUNCTIONS *
- ****************************/
-
-/* is_mail_autolink • looks for the address part of a mail autolink and '>' */
-/* this is less strict than the original markdown e-mail address matching */
-static size_t
-is_mail_autolink(uint8_t *data, size_t size)
-{
- size_t i = 0, nb = 0;
-
- /* address is assumed to be: [-@._a-zA-Z0-9]+ with exactly one '@' */
- for (i = 0; i < size; ++i) {
- if (isalnum(data[i]))
- continue;
-
- switch (data[i]) {
- case '@':
- nb++;
-
- case '-':
- case '.':
- case '_':
- break;
-
- case '>':
- return (nb == 1) ? i + 1 : 0;
-
- default:
- return 0;
- }
- }
-
- return 0;
-}
-
-/* tag_length • returns the length of the given tag, or 0 is it's not valid */
-static size_t
-tag_length(uint8_t *data, size_t size, hoedown_autolink_type *autolink)
-{
- size_t i, j;
-
- /* a valid tag can't be shorter than 3 chars */
- if (size < 3) return 0;
-
- /* begins with a '<' optionally followed by '/', followed by letter or number */
- if (data[0] != '<') return 0;
- i = (data[1] == '/') ? 2 : 1;
-
- if (!isalnum(data[i]))
- return 0;
-
- /* scheme test */
- *autolink = HOEDOWN_AUTOLINK_NONE;
-
- /* try to find the beginning of an URI */
- while (i < size && (isalnum(data[i]) || data[i] == '.' || data[i] == '+' || data[i] == '-'))
- i++;
-
- if (i > 1 && data[i] == '@') {
- if ((j = is_mail_autolink(data + i, size - i)) != 0) {
- *autolink = HOEDOWN_AUTOLINK_EMAIL;
- return i + j;
- }
- }
-
- if (i > 2 && data[i] == ':') {
- *autolink = HOEDOWN_AUTOLINK_NORMAL;
- i++;
- }
-
- /* completing autolink test: no spacing or ' or " */
- if (i >= size)
- *autolink = HOEDOWN_AUTOLINK_NONE;
-
- else if (*autolink) {
- j = i;
-
- while (i < size) {
- if (data[i] == '\\') i += 2;
- else if (data[i] == '>' || data[i] == '\'' ||
- data[i] == '"' || data[i] == ' ' || data[i] == '\n')
- break;
- else i++;
- }
-
- if (i >= size) return 0;
- if (i > j && data[i] == '>') return i + 1;
- /* one of the forbidden chars has been found */
- *autolink = HOEDOWN_AUTOLINK_NONE;
- }
-
- /* looking for something looking like a tag end */
- while (i < size && data[i] != '>') i++;
- if (i >= size) return 0;
- return i + 1;
-}
-
-/* parse_inline • parses inline markdown elements */
-static void
-parse_inline(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- size_t i = 0, end = 0, consumed = 0;
- hoedown_buffer work = { 0, 0, 0, 0, NULL, NULL, NULL };
- uint8_t *active_char = doc->active_char;
-
- if (doc->work_bufs[BUFFER_SPAN].size +
- doc->work_bufs[BUFFER_BLOCK].size > doc->max_nesting)
- return;
-
- while (i < size) {
- /* copying inactive chars into the output */
- while (end < size && active_char[data[end]] == 0)
- end++;
-
- if (doc->md.normal_text) {
- work.data = data + i;
- work.size = end - i;
- doc->md.normal_text(ob, &work, &doc->data);
- }
- else
- hoedown_buffer_put(ob, data + i, end - i);
-
- if (end >= size) break;
- i = end;
-
- end = markdown_char_ptrs[ (int)active_char[data[end]] ](ob, doc, data + i, i - consumed, size - i);
- if (!end) /* no action from the callback */
- end = i + 1;
- else {
- i += end;
- end = i;
- consumed = i;
- }
- }
-}
-
-/* is_escaped • returns whether special char at data[loc] is escaped by '\\' */
-static int
-is_escaped(uint8_t *data, size_t loc)
-{
- size_t i = loc;
- while (i >= 1 && data[i - 1] == '\\')
- i--;
-
- /* odd numbers of backslashes escapes data[loc] */
- return (loc - i) % 2;
-}
-
-/* find_emph_char • looks for the next emph uint8_t, skipping other constructs */
-static size_t
-find_emph_char(uint8_t *data, size_t size, uint8_t c)
-{
- size_t i = 0;
-
- while (i < size) {
- while (i < size && data[i] != c && data[i] != '[' && data[i] != '`')
- i++;
-
- if (i == size)
- return 0;
-
- /* not counting escaped chars */
- if (is_escaped(data, i)) {
- i++; continue;
- }
-
- if (data[i] == c)
- return i;
-
- /* skipping a codespan */
- if (data[i] == '`') {
- size_t span_nb = 0, bt;
- size_t tmp_i = 0;
-
- /* counting the number of opening backticks */
- while (i < size && data[i] == '`') {
- i++; span_nb++;
- }
-
- if (i >= size) return 0;
-
- /* finding the matching closing sequence */
- bt = 0;
- while (i < size && bt < span_nb) {
- if (!tmp_i && data[i] == c) tmp_i = i;
- if (data[i] == '`') bt++;
- else bt = 0;
- i++;
- }
-
- /* not a well-formed codespan; use found matching emph char */
- if (i >= size) return tmp_i;
- }
- /* skipping a link */
- else if (data[i] == '[') {
- size_t tmp_i = 0;
- uint8_t cc;
-
- i++;
- while (i < size && data[i] != ']') {
- if (!tmp_i && data[i] == c) tmp_i = i;
- i++;
- }
-
- i++;
- while (i < size && _isspace(data[i]))
- i++;
-
- if (i >= size)
- return tmp_i;
-
- switch (data[i]) {
- case '[':
- cc = ']'; break;
-
- case '(':
- cc = ')'; break;
-
- default:
- if (tmp_i)
- return tmp_i;
- else
- continue;
- }
-
- i++;
- while (i < size && data[i] != cc) {
- if (!tmp_i && data[i] == c) tmp_i = i;
- i++;
- }
-
- if (i >= size)
- return tmp_i;
-
- i++;
- }
- }
-
- return 0;
-}
-
-/* parse_emph1 • parsing single emphase */
-/* closed by a symbol not preceded by spacing and not followed by symbol */
-static size_t
-parse_emph1(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, uint8_t c)
-{
- size_t i = 0, len;
- hoedown_buffer *work = 0;
- int r;
-
- /* 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 (data[i] == c && !_isspace(data[i - 1])) {
-
- if (doc->ext_flags & HOEDOWN_EXT_NO_INTRA_EMPHASIS) {
- if (i + 1 < size && isalnum(data[i + 1]))
- continue;
- }
-
- work = newbuf(doc, BUFFER_SPAN);
- parse_inline(work, doc, data, i);
-
- if (doc->ext_flags & HOEDOWN_EXT_UNDERLINE && c == '_')
- r = doc->md.underline(ob, work, &doc->data);
- else
- r = doc->md.emphasis(ob, work, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
- return r ? i + 1 : 0;
- }
- }
-
- return 0;
-}
-
-/* parse_emph2 • parsing single emphase */
-static size_t
-parse_emph2(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, uint8_t c)
-{
- size_t i = 0, len;
- hoedown_buffer *work = 0;
- int r;
-
- 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 = newbuf(doc, BUFFER_SPAN);
- parse_inline(work, doc, data, i);
-
- if (c == '~')
- r = doc->md.strikethrough(ob, work, &doc->data);
- else if (c == '=')
- r = doc->md.highlight(ob, work, &doc->data);
- else
- r = doc->md.double_emphasis(ob, work, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
- return r ? i + 2 : 0;
- }
- i++;
- }
- return 0;
-}
-
-/* parse_emph3 • parsing single emphase */
-/* finds the first closing tag, and delegates to the other emph */
-static size_t
-parse_emph3(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, uint8_t 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 spacing preceded symbols */
- if (data[i] != c || _isspace(data[i - 1]))
- continue;
-
- if (i + 2 < size && data[i + 1] == c && data[i + 2] == c && doc->md.triple_emphasis) {
- /* triple symbol found */
- hoedown_buffer *work = newbuf(doc, BUFFER_SPAN);
-
- parse_inline(work, doc, data, i);
- r = doc->md.triple_emphasis(ob, work, &doc->data);
- popbuf(doc, BUFFER_SPAN);
- 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, doc, 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, doc, data - 1, size + 1, c);
- if (!len) return 0;
- else return len - 1;
- }
- }
- return 0;
-}
-
-/* parse_math • parses a math span until the given ending delimiter */
-static size_t
-parse_math(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size, const char *end, size_t delimsz, int displaymode)
-{
- hoedown_buffer text = { NULL, 0, 0, 0, NULL, NULL, NULL };
- size_t i = delimsz;
-
- if (!doc->md.math)
- return 0;
-
- /* find ending delimiter */
- while (1) {
- while (i < size && data[i] != (uint8_t)end[0])
- i++;
-
- if (i >= size)
- return 0;
-
- if (!is_escaped(data, i) && !(i + delimsz > size)
- && memcmp(data + i, end, delimsz) == 0)
- break;
-
- i++;
- }
-
- /* prepare buffers */
- text.data = data + delimsz;
- text.size = i - delimsz;
-
- /* if this is a $$ and MATH_EXPLICIT is not active,
- * guess whether displaymode should be enabled from the context */
- i += delimsz;
- if (delimsz == 2 && !(doc->ext_flags & HOEDOWN_EXT_MATH_EXPLICIT))
- displaymode = is_empty_all(data - offset, offset) && is_empty_all(data + i, size - i);
-
- /* call callback */
- if (doc->md.math(ob, &text, displaymode, &doc->data))
- return i;
-
- return 0;
-}
-
-/* char_emphasis • single and double emphasis parsing */
-static size_t
-char_emphasis(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- uint8_t c = data[0];
- size_t ret;
-
- if (doc->ext_flags & HOEDOWN_EXT_NO_INTRA_EMPHASIS) {
- if (offset > 0 && !_isspace(data[-1]) && data[-1] != '>' && data[-1] != '(')
- return 0;
- }
-
- if (size > 2 && data[1] != c) {
- /* spacing cannot follow an opening emphasis;
- * strikethrough and highlight only takes two characters '~~' */
- if (c == '~' || c == '=' || _isspace(data[1]) || (ret = parse_emph1(ob, doc, data + 1, size - 1, c)) == 0)
- return 0;
-
- return ret + 1;
- }
-
- if (size > 3 && data[1] == c && data[2] != c) {
- if (_isspace(data[2]) || (ret = parse_emph2(ob, doc, data + 2, size - 2, c)) == 0)
- return 0;
-
- return ret + 2;
- }
-
- if (size > 4 && data[1] == c && data[2] == c && data[3] != c) {
- if (c == '~' || c == '=' || _isspace(data[3]) || (ret = parse_emph3(ob, doc, data + 3, size - 3, c)) == 0)
- return 0;
-
- return ret + 3;
- }
-
- return 0;
-}
-
-
-/* char_linebreak • '\n' preceded by two spaces (assuming linebreak != 0) */
-static size_t
-char_linebreak(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- if (offset < 2 || data[-1] != ' ' || data[-2] != ' ')
- return 0;
-
- /* removing the last space from ob and rendering */
- while (ob->size && ob->data[ob->size - 1] == ' ')
- ob->size--;
-
- return doc->md.linebreak(ob, &doc->data) ? 1 : 0;
-}
-
-
-/* char_codespan • '`' parsing a code span (assuming codespan != 0) */
-static size_t
-char_codespan(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- hoedown_buffer work = { NULL, 0, 0, 0, NULL, NULL, NULL };
- size_t end, nb = 0, i, f_begin, f_end;
-
- /* counting the number of backticks in the delimiter */
- while (nb < size && data[nb] == '`')
- nb++;
-
- /* finding the next delimiter */
- i = 0;
- for (end = nb; end < size && i < nb; end++) {
- if (data[end] == '`') i++;
- else i = 0;
- }
-
- if (i < nb && end >= size)
- return 0; /* no matching delimiter */
-
- /* trimming outside spaces */
- f_begin = nb;
- while (f_begin < end && data[f_begin] == ' ')
- f_begin++;
-
- f_end = end - nb;
- while (f_end > nb && data[f_end-1] == ' ')
- f_end--;
-
- /* real code span */
- if (f_begin < f_end) {
- work.data = data + f_begin;
- work.size = f_end - f_begin;
-
- if (!doc->md.codespan(ob, &work, &doc->data))
- end = 0;
- } else {
- if (!doc->md.codespan(ob, 0, &doc->data))
- end = 0;
- }
-
- return end;
-}
-
-/* char_quote • '"' parsing a quote */
-static size_t
-char_quote(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- size_t end, nq = 0, i, f_begin, f_end;
-
- /* counting the number of quotes in the delimiter */
- while (nq < size && data[nq] == '"')
- nq++;
-
- /* finding the next delimiter */
- end = nq;
- while (1) {
- i = end;
- end += find_emph_char(data + end, size - end, '"');
- if (end == i) return 0; /* no matching delimiter */
- i = end;
- while (end < size && data[end] == '"' && end - i < nq) end++;
- if (end - i >= nq) break;
- }
-
- /* trimming outside spaces */
- f_begin = nq;
- while (f_begin < end && data[f_begin] == ' ')
- f_begin++;
-
- f_end = end - nq;
- while (f_end > nq && data[f_end-1] == ' ')
- f_end--;
-
- /* real quote */
- if (f_begin < f_end) {
- hoedown_buffer *work = newbuf(doc, BUFFER_SPAN);
- parse_inline(work, doc, data + f_begin, f_end - f_begin);
-
- if (!doc->md.quote(ob, work, &doc->data))
- end = 0;
- popbuf(doc, BUFFER_SPAN);
- } else {
- if (!doc->md.quote(ob, 0, &doc->data))
- end = 0;
- }
-
- return end;
-}
-
-
-/* char_escape • '\\' backslash escape */
-static size_t
-char_escape(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- static const char *escape_chars = "\\`*_{}[]()#+-.!:|&<>^~=\"$";
- hoedown_buffer work = { 0, 0, 0, 0, NULL, NULL, NULL };
- size_t w;
-
- if (size > 1) {
- if (data[1] == '\\' && (doc->ext_flags & HOEDOWN_EXT_MATH) &&
- size > 2 && (data[2] == '(' || data[2] == '[')) {
- const char *end = (data[2] == '[') ? "\\\\]" : "\\\\)";
- w = parse_math(ob, doc, data, offset, size, end, 3, data[2] == '[');
- if (w) return w;
- }
-
- if (strchr(escape_chars, data[1]) == NULL)
- return 0;
-
- if (doc->md.normal_text) {
- work.data = data + 1;
- work.size = 1;
- doc->md.normal_text(ob, &work, &doc->data);
- }
- else hoedown_buffer_putc(ob, data[1]);
- } else if (size == 1) {
- hoedown_buffer_putc(ob, data[0]);
- }
-
- return 2;
-}
-
-/* char_entity • '&' escaped when it doesn't belong to an entity */
-/* valid entities are assumed to be anything matching &#?[A-Za-z0-9]+; */
-static size_t
-char_entity(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- size_t end = 1;
- hoedown_buffer work = { 0, 0, 0, 0, NULL, NULL, NULL };
-
- if (end < size && data[end] == '#')
- end++;
-
- while (end < size && isalnum(data[end]))
- end++;
-
- if (end < size && data[end] == ';')
- end++; /* real entity */
- else
- return 0; /* lone '&' */
-
- if (doc->md.entity) {
- work.data = data;
- work.size = end;
- doc->md.entity(ob, &work, &doc->data);
- }
- else hoedown_buffer_put(ob, data, end);
-
- return end;
-}
-
-/* char_langle_tag • '<' when tags or autolinks are allowed */
-static size_t
-char_langle_tag(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- hoedown_buffer work = { NULL, 0, 0, 0, NULL, NULL, NULL };
- hoedown_autolink_type altype = HOEDOWN_AUTOLINK_NONE;
- size_t end = tag_length(data, size, &altype);
- int ret = 0;
-
- work.data = data;
- work.size = end;
-
- if (end > 2) {
- if (doc->md.autolink && altype != HOEDOWN_AUTOLINK_NONE) {
- hoedown_buffer *u_link = newbuf(doc, BUFFER_SPAN);
- work.data = data + 1;
- work.size = end - 2;
- unscape_text(u_link, &work);
- ret = doc->md.autolink(ob, u_link, altype, &doc->data);
- popbuf(doc, BUFFER_SPAN);
- }
- else if (doc->md.raw_html)
- ret = doc->md.raw_html(ob, &work, &doc->data);
- }
-
- if (!ret) return 0;
- else return end;
-}
-
-static size_t
-char_autolink_www(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- hoedown_buffer *link, *link_url, *link_text;
- size_t link_len, rewind;
-
- if (!doc->md.link || doc->in_link_body)
- return 0;
-
- link = newbuf(doc, BUFFER_SPAN);
-
- if ((link_len = hoedown_autolink__www(&rewind, link, data, offset, size, HOEDOWN_AUTOLINK_SHORT_DOMAINS)) > 0) {
- link_url = newbuf(doc, BUFFER_SPAN);
- HOEDOWN_BUFPUTSL(link_url, "http://");
- hoedown_buffer_put(link_url, link->data, link->size);
-
- ob->size -= rewind;
- if (doc->md.normal_text) {
- link_text = newbuf(doc, BUFFER_SPAN);
- doc->md.normal_text(link_text, link, &doc->data);
- doc->md.link(ob, link_text, link_url, NULL, &doc->data);
- popbuf(doc, BUFFER_SPAN);
- } else {
- doc->md.link(ob, link, link_url, NULL, &doc->data);
- }
- popbuf(doc, BUFFER_SPAN);
- }
-
- popbuf(doc, BUFFER_SPAN);
- return link_len;
-}
-
-static size_t
-char_autolink_email(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- hoedown_buffer *link;
- size_t link_len, rewind;
-
- if (!doc->md.autolink || doc->in_link_body)
- return 0;
-
- link = newbuf(doc, BUFFER_SPAN);
-
- if ((link_len = hoedown_autolink__email(&rewind, link, data, offset, size, 0)) > 0) {
- ob->size -= rewind;
- doc->md.autolink(ob, link, HOEDOWN_AUTOLINK_EMAIL, &doc->data);
- }
-
- popbuf(doc, BUFFER_SPAN);
- return link_len;
-}
-
-static size_t
-char_autolink_url(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- hoedown_buffer *link;
- size_t link_len, rewind;
-
- if (!doc->md.autolink || doc->in_link_body)
- return 0;
-
- link = newbuf(doc, BUFFER_SPAN);
-
- if ((link_len = hoedown_autolink__url(&rewind, link, data, offset, size, 0)) > 0) {
- ob->size -= rewind;
- doc->md.autolink(ob, link, HOEDOWN_AUTOLINK_NORMAL, &doc->data);
- }
-
- popbuf(doc, BUFFER_SPAN);
- return link_len;
-}
-
-/* char_link • '[': parsing a link, a footnote or an image */
-static size_t
-char_link(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- int is_img = (offset && data[-1] == '!' && !is_escaped(data - offset, offset - 1));
- int is_footnote = (doc->ext_flags & HOEDOWN_EXT_FOOTNOTES && data[1] == '^');
- size_t i = 1, txt_e, link_b = 0, link_e = 0, title_b = 0, title_e = 0;
- hoedown_buffer *content = NULL;
- hoedown_buffer *link = NULL;
- hoedown_buffer *title = NULL;
- hoedown_buffer *u_link = NULL;
- size_t org_work_size = doc->work_bufs[BUFFER_SPAN].size;
- int ret = 0, in_title = 0, qtype = 0;
-
- /* checking whether the correct renderer exists */
- if ((is_footnote && !doc->md.footnote_ref) || (is_img && !doc->md.image)
- || (!is_img && !is_footnote && !doc->md.link))
- goto cleanup;
-
- /* looking for the matching closing bracket */
- i += find_emph_char(data + i, size - i, ']');
- txt_e = i;
-
- if (i < size && data[i] == ']') i++;
- else goto cleanup;
-
- /* footnote link */
- if (is_footnote) {
- hoedown_buffer id = { NULL, 0, 0, 0, NULL, NULL, NULL };
- struct footnote_ref *fr;
-
- if (txt_e < 3)
- goto cleanup;
-
- id.data = data + 2;
- id.size = txt_e - 2;
-
- fr = find_footnote_ref(&doc->footnotes_found, id.data, id.size);
-
- /* mark footnote used */
- if (fr && !fr->is_used) {
- if(!add_footnote_ref(&doc->footnotes_used, fr))
- goto cleanup;
- fr->is_used = 1;
- fr->num = doc->footnotes_used.count;
-
- /* render */
- if (doc->md.footnote_ref)
- ret = doc->md.footnote_ref(ob, fr->num, &doc->data);
- }
-
- goto cleanup;
- }
-
- /* skip any amount of spacing */
- /* (this is much more laxist than original markdown syntax) */
- while (i < size && _isspace(data[i]))
- i++;
-
- /* inline style link */
- if (i < size && data[i] == '(') {
- size_t nb_p;
-
- /* skipping initial spacing */
- i++;
-
- while (i < size && _isspace(data[i]))
- i++;
-
- link_b = i;
-
- /* looking for link end: ' " ) */
- /* Count the number of open parenthesis */
- nb_p = 0;
-
- while (i < size) {
- if (data[i] == '\\') i += 2;
- else if (data[i] == '(' && i != 0) {
- nb_p++; i++;
- }
- else if (data[i] == ')') {
- if (nb_p == 0) break;
- else nb_p--; i++;
- } else if (i >= 1 && _isspace(data[i-1]) && (data[i] == '\'' || data[i] == '"')) break;
- else i++;
- }
-
- if (i >= size) goto cleanup;
- link_e = i;
-
- /* looking for title end if present */
- if (data[i] == '\'' || data[i] == '"') {
- qtype = data[i];
- in_title = 1;
- i++;
- title_b = i;
-
- while (i < size) {
- if (data[i] == '\\') i += 2;
- else if (data[i] == qtype) {in_title = 0; i++;}
- else if ((data[i] == ')') && !in_title) break;
- else i++;
- }
-
- if (i >= size) goto cleanup;
-
- /* skipping spacing after title */
- title_e = i - 1;
- while (title_e > title_b && _isspace(data[title_e]))
- title_e--;
-
- /* checking for closing quote presence */
- if (data[title_e] != '\'' && data[title_e] != '"') {
- title_b = title_e = 0;
- link_e = i;
- }
- }
-
- /* remove spacing at the end of the link */
- while (link_e > link_b && _isspace(data[link_e - 1]))
- link_e--;
-
- /* remove optional angle brackets around the link */
- if (data[link_b] == '<') link_b++;
- if (data[link_e - 1] == '>') link_e--;
-
- /* building escaped link and title */
- if (link_e > link_b) {
- link = newbuf(doc, BUFFER_SPAN);
- hoedown_buffer_put(link, data + link_b, link_e - link_b);
- }
-
- if (title_e > title_b) {
- title = newbuf(doc, BUFFER_SPAN);
- hoedown_buffer_put(title, data + title_b, title_e - title_b);
- }
-
- i++;
- }
-
- /* reference style link */
- else if (i < size && data[i] == '[') {
- hoedown_buffer *id = newbuf(doc, BUFFER_SPAN);
- struct link_ref *lr;
-
- /* looking for the id */
- i++;
- link_b = i;
- while (i < size && data[i] != ']') i++;
- if (i >= size) goto cleanup;
- link_e = i;
-
- /* finding the link_ref */
- if (link_b == link_e)
- replace_spacing(id, data + 1, txt_e - 1);
- else
- hoedown_buffer_put(id, data + link_b, link_e - link_b);
-
- lr = find_link_ref(doc->refs, id->data, id->size);
- if (!lr)
- goto cleanup;
-
- /* keeping link and title from link_ref */
- link = lr->link;
- title = lr->title;
- i++;
- }
-
- /* shortcut reference style link */
- else {
- hoedown_buffer *id = newbuf(doc, BUFFER_SPAN);
- struct link_ref *lr;
-
- /* crafting the id */
- replace_spacing(id, data + 1, txt_e - 1);
-
- /* finding the link_ref */
- lr = find_link_ref(doc->refs, id->data, id->size);
- if (!lr)
- goto cleanup;
-
- /* keeping link and title from link_ref */
- link = lr->link;
- title = lr->title;
-
- /* rewinding the spacing */
- i = txt_e + 1;
- }
-
- /* building content: img alt is kept, only link content is parsed */
- if (txt_e > 1) {
- content = newbuf(doc, BUFFER_SPAN);
- if (is_img) {
- hoedown_buffer_put(content, data + 1, txt_e - 1);
- } else {
- /* disable autolinking when parsing inline the
- * content of a link */
- doc->in_link_body = 1;
- parse_inline(content, doc, data + 1, txt_e - 1);
- doc->in_link_body = 0;
- }
- }
-
- if (link) {
- u_link = newbuf(doc, BUFFER_SPAN);
- unscape_text(u_link, link);
- }
-
- /* calling the relevant rendering function */
- if (is_img) {
- if (ob->size && ob->data[ob->size - 1] == '!')
- ob->size -= 1;
-
- ret = doc->md.image(ob, u_link, title, content, &doc->data);
- } else {
- ret = doc->md.link(ob, content, u_link, title, &doc->data);
- }
-
- /* cleanup */
-cleanup:
- doc->work_bufs[BUFFER_SPAN].size = (int)org_work_size;
- return ret ? i : 0;
-}
-
-static size_t
-char_superscript(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- size_t sup_start, sup_len;
- hoedown_buffer *sup;
-
- if (!doc->md.superscript)
- return 0;
-
- if (size < 2)
- return 0;
-
- if (data[1] == '(') {
- sup_start = 2;
- sup_len = find_emph_char(data + 2, size - 2, ')') + 2;
-
- if (sup_len == size)
- return 0;
- } else {
- sup_start = sup_len = 1;
-
- while (sup_len < size && !_isspace(data[sup_len]))
- sup_len++;
- }
-
- if (sup_len - sup_start == 0)
- return (sup_start == 2) ? 3 : 0;
-
- sup = newbuf(doc, BUFFER_SPAN);
- parse_inline(sup, doc, data + sup_start, sup_len - sup_start);
- doc->md.superscript(ob, sup, &doc->data);
- popbuf(doc, BUFFER_SPAN);
-
- return (sup_start == 2) ? sup_len + 1 : sup_len;
-}
-
-static size_t
-char_math(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
-{
- /* double dollar */
- if (size > 1 && data[1] == '$')
- return parse_math(ob, doc, data, offset, size, "$$", 2, 1);
-
- /* single dollar allowed only with MATH_EXPLICIT flag */
- if (doc->ext_flags & HOEDOWN_EXT_MATH_EXPLICIT)
- return parse_math(ob, doc, data, offset, size, "$", 1, 0);
-
- return 0;
-}
-
-/*********************************
- * BLOCK-LEVEL PARSING FUNCTIONS *
- *********************************/
-
-/* is_empty • returns the line length when it is empty, 0 otherwise */
-static size_t
-is_empty(const uint8_t *data, size_t size)
-{
- size_t i;
-
- for (i = 0; i < size && data[i] != '\n'; i++)
- if (data[i] != ' ')
- return 0;
-
- return i + 1;
-}
-
-/* is_hrule • returns whether a line is a horizontal rule */
-static int
-is_hrule(uint8_t *data, size_t size)
-{
- size_t i = 0, n = 0;
- uint8_t c;
-
- /* skipping initial spaces */
- if (size < 3) return 0;
- if (data[0] == ' ') { i++;
- if (data[1] == ' ') { i++;
- if (data[2] == ' ') { i++; } } }
-
- /* looking at the hrule uint8_t */
- if (i + 2 >= size
- || (data[i] != '*' && data[i] != '-' && data[i] != '_'))
- return 0;
- c = data[i];
-
- /* the whole line must be the char or space */
- while (i < size && data[i] != '\n') {
- if (data[i] == c) n++;
- else if (data[i] != ' ')
- return 0;
-
- i++;
- }
-
- return n >= 3;
-}
-
-/* check if a line is a code fence; return the
- * end of the code fence. if passed, width of
- * the fence rule and character will be returned */
-static size_t
-is_codefence(uint8_t *data, size_t size, size_t *width, uint8_t *chr)
-{
- size_t i = 0, n = 1;
- uint8_t c;
-
- /* skipping initial spaces */
- if (size < 3)
- return 0;
-
- if (data[0] == ' ') { i++;
- if (data[1] == ' ') { i++;
- if (data[2] == ' ') { i++; } } }
-
- /* looking at the hrule uint8_t */
- c = data[i];
- if (i + 2 >= size || !(c=='~' || c=='`'))
- return 0;
-
- /* the fence must be that same character */
- while (++i < size && data[i] == c)
- ++n;
-
- if (n < 3)
- return 0;
-
- if (width) *width = n;
- if (chr) *chr = c;
- return i;
-}
-
-/* expects single line, checks if it's a codefence and extracts language */
-static size_t
-parse_codefence(uint8_t *data, size_t size, hoedown_buffer *lang, size_t *width, uint8_t *chr)
-{
- size_t i, w, lang_start;
-
- i = w = is_codefence(data, size, width, chr);
- if (i == 0)
- return 0;
-
- while (i < size && _isspace(data[i]))
- i++;
-
- lang_start = i;
-
- while (i < size && !_isspace(data[i]))
- i++;
-
- lang->data = data + lang_start;
- lang->size = i - lang_start;
-
- /* Avoid parsing a codespan as a fence */
- i = lang_start + 2;
- while (i < size && !(data[i] == *chr && data[i-1] == *chr && data[i-2] == *chr)) i++;
- if (i < size) return 0;
-
- return w;
-}
-
-/* is_atxheader • returns whether the line is a hash-prefixed header */
-static int
-is_atxheader(hoedown_document *doc, uint8_t *data, size_t size)
-{
- if (data[0] != '#')
- return 0;
-
- if (doc->ext_flags & HOEDOWN_EXT_SPACE_HEADERS) {
- size_t level = 0;
-
- while (level < size && level < 6 && data[level] == '#')
- level++;
-
- if (level < size && data[level] != ' ')
- return 0;
- }
-
- return 1;
-}
-
-/* is_headerline • returns whether the line is a setext-style hdr underline */
-static int
-is_headerline(uint8_t *data, size_t size)
-{
- size_t i = 0;
-
- /* test of level 1 header */
- if (data[i] == '=') {
- for (i = 1; i < size && data[i] == '='; i++);
- while (i < size && data[i] == ' ') i++;
- return (i >= size || data[i] == '\n') ? 1 : 0; }
-
- /* test of level 2 header */
- if (data[i] == '-') {
- for (i = 1; i < size && data[i] == '-'; i++);
- while (i < size && data[i] == ' ') i++;
- return (i >= size || data[i] == '\n') ? 2 : 0; }
-
- return 0;
-}
-
-static int
-is_next_headerline(uint8_t *data, size_t size)
-{
- size_t i = 0;
-
- while (i < size && data[i] != '\n')
- i++;
-
- if (++i >= size)
- return 0;
-
- return is_headerline(data + i, size - i);
-}
-
-/* prefix_quote • returns blockquote prefix length */
-static size_t
-prefix_quote(uint8_t *data, size_t size)
-{
- size_t i = 0;
- if (i < size && data[i] == ' ') i++;
- if (i < size && data[i] == ' ') i++;
- if (i < size && data[i] == ' ') i++;
-
- if (i < size && data[i] == '>') {
- if (i + 1 < size && data[i + 1] == ' ')
- return i + 2;
-
- return i + 1;
- }
-
- return 0;
-}
-
-/* prefix_code • returns prefix length for block code*/
-static size_t
-prefix_code(uint8_t *data, size_t size)
-{
- if (size > 3 && data[0] == ' ' && data[1] == ' '
- && data[2] == ' ' && data[3] == ' ') return 4;
-
- return 0;
-}
-
-/* prefix_oli • returns ordered list item prefix */
-static size_t
-prefix_oli(uint8_t *data, size_t size)
-{
- size_t i = 0;
-
- if (i < size && data[i] == ' ') i++;
- if (i < size && data[i] == ' ') i++;
- if (i < size && data[i] == ' ') i++;
-
- if (i >= size || data[i] < '0' || data[i] > '9')
- return 0;
-
- while (i < size && data[i] >= '0' && data[i] <= '9')
- i++;
-
- if (i + 1 >= size || data[i] != '.' || data[i + 1] != ' ')
- return 0;
-
- if (is_next_headerline(data + i, size - i))
- return 0;
-
- return i + 2;
-}
-
-/* prefix_uli • returns ordered list item prefix */
-static size_t
-prefix_uli(uint8_t *data, size_t size)
-{
- size_t i = 0;
-
- if (i < size && data[i] == ' ') i++;
- if (i < size && data[i] == ' ') i++;
- if (i < size && data[i] == ' ') i++;
-
- if (i + 1 >= size ||
- (data[i] != '*' && data[i] != '+' && data[i] != '-') ||
- data[i + 1] != ' ')
- return 0;
-
- if (is_next_headerline(data + i, size - i))
- return 0;
-
- return i + 2;
-}
-
-
-/* parse_block • parsing of one block, returning next uint8_t to parse */
-static void parse_block(hoedown_buffer *ob, hoedown_document *doc,
- uint8_t *data, size_t size);
-
-
-/* parse_blockquote • handles parsing of a blockquote fragment */
-static size_t
-parse_blockquote(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- size_t beg, end = 0, pre, work_size = 0;
- uint8_t *work_data = 0;
- hoedown_buffer *out = 0;
-
- out = newbuf(doc, BUFFER_BLOCK);
- beg = 0;
- while (beg < size) {
- for (end = beg + 1; end < size && data[end - 1] != '\n'; end++);
-
- pre = prefix_quote(data + beg, end - beg);
-
- if (pre)
- beg += pre; /* skipping prefix */
-
- /* empty line followed by non-quote line */
- else if (is_empty(data + beg, end - beg) &&
- (end >= size || (prefix_quote(data + end, size - end) == 0 &&
- !is_empty(data + end, size - end))))
- break;
-
- if (beg < end) { /* copy into the in-place working buffer */
- /* hoedown_buffer_put(work, data + beg, end - beg); */
- if (!work_data)
- work_data = data + beg;
- else if (data + beg != work_data + work_size)
- memmove(work_data + work_size, data + beg, end - beg);
- work_size += end - beg;
- }
- beg = end;
- }
-
- parse_block(out, doc, work_data, work_size);
- if (doc->md.blockquote)
- doc->md.blockquote(ob, out, &doc->data);
- popbuf(doc, BUFFER_BLOCK);
- return end;
-}
-
-static size_t
-parse_htmlblock(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, int do_render);
-
-/* parse_blockquote • handles parsing of a regular paragraph */
-static size_t
-parse_paragraph(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- hoedown_buffer work = { NULL, 0, 0, 0, NULL, NULL, NULL };
- size_t i = 0, end = 0;
- int level = 0;
-
- work.data = data;
-
- while (i < size) {
- for (end = i + 1; end < size && data[end - 1] != '\n'; end++) /* empty */;
-
- if (is_empty(data + i, size - i))
- break;
-
- if ((level = is_headerline(data + i, size - i)) != 0)
- break;
-
- if (is_atxheader(doc, data + i, size - i) ||
- is_hrule(data + i, size - i) ||
- prefix_quote(data + i, size - i)) {
- end = i;
- break;
- }
-
- i = end;
- }
-
- work.size = i;
- while (work.size && data[work.size - 1] == '\n')
- work.size--;
-
- if (!level) {
- hoedown_buffer *tmp = newbuf(doc, BUFFER_BLOCK);
- parse_inline(tmp, doc, work.data, work.size);
- if (doc->md.paragraph)
- doc->md.paragraph(ob, tmp, &doc->data);
- popbuf(doc, BUFFER_BLOCK);
- } else {
- hoedown_buffer *header_work;
-
- if (work.size) {
- size_t beg;
- i = work.size;
- work.size -= 1;
-
- while (work.size && data[work.size] != '\n')
- work.size -= 1;
-
- beg = work.size + 1;
- while (work.size && data[work.size - 1] == '\n')
- work.size -= 1;
-
- if (work.size > 0) {
- hoedown_buffer *tmp = newbuf(doc, BUFFER_BLOCK);
- parse_inline(tmp, doc, work.data, work.size);
-
- if (doc->md.paragraph)
- doc->md.paragraph(ob, tmp, &doc->data);
-
- popbuf(doc, BUFFER_BLOCK);
- work.data += beg;
- work.size = i - beg;
- }
- else work.size = i;
- }
-
- header_work = newbuf(doc, BUFFER_SPAN);
- parse_inline(header_work, doc, work.data, work.size);
-
- if (doc->md.header)
- doc->md.header(ob, header_work, (int)level, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
- }
-
- return end;
-}
-
-/* parse_fencedcode • handles parsing of a block-level code fragment */
-static size_t
-parse_fencedcode(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- hoedown_buffer text = { 0, 0, 0, 0, NULL, NULL, NULL };
- hoedown_buffer lang = { 0, 0, 0, 0, NULL, NULL, NULL };
- size_t i = 0, text_start, line_start;
- size_t w, w2;
- size_t width, width2;
- uint8_t chr, chr2;
-
- /* parse codefence line */
- while (i < size && data[i] != '\n')
- i++;
-
- w = parse_codefence(data, i, &lang, &width, &chr);
- if (!w)
- return 0;
-
- /* search for end */
- i++;
- text_start = i;
- while ((line_start = i) < size) {
- while (i < size && data[i] != '\n')
- i++;
-
- w2 = is_codefence(data + line_start, i - line_start, &width2, &chr2);
- if (w == w2 && width == width2 && chr == chr2 &&
- is_empty(data + (line_start+w), i - (line_start+w)))
- break;
-
- i++;
- }
-
- text.data = data + text_start;
- text.size = line_start - text_start;
-
- if (doc->md.blockcode)
- doc->md.blockcode(ob, text.size ? &text : NULL, lang.size ? &lang : NULL, &doc->data);
-
- return i;
-}
-
-static size_t
-parse_blockcode(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- size_t beg, end, pre;
- hoedown_buffer *work = 0;
-
- work = newbuf(doc, BUFFER_BLOCK);
-
- beg = 0;
- while (beg < size) {
- for (end = beg + 1; end < size && data[end - 1] != '\n'; end++) {};
- pre = prefix_code(data + beg, end - beg);
-
- if (pre)
- beg += pre; /* skipping prefix */
- else if (!is_empty(data + beg, end - beg))
- /* non-empty non-prefixed line breaks the pre */
- break;
-
- if (beg < end) {
- /* verbatim copy to the working buffer,
- escaping entities */
- if (is_empty(data + beg, end - beg))
- hoedown_buffer_putc(work, '\n');
- else hoedown_buffer_put(work, data + beg, end - beg);
- }
- beg = end;
- }
-
- while (work->size && work->data[work->size - 1] == '\n')
- work->size -= 1;
-
- hoedown_buffer_putc(work, '\n');
-
- if (doc->md.blockcode)
- doc->md.blockcode(ob, work, NULL, &doc->data);
-
- popbuf(doc, BUFFER_BLOCK);
- return beg;
-}
-
-/* parse_listitem • parsing of a single list item */
-/* assuming initial prefix is already removed */
-static size_t
-parse_listitem(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, hoedown_list_flags *flags)
-{
- hoedown_buffer *work = 0, *inter = 0;
- size_t beg = 0, end, pre, sublist = 0, orgpre = 0, i;
- int in_empty = 0, has_inside_empty = 0, in_fence = 0;
-
- /* keeping track of the first indentation prefix */
- while (orgpre < 3 && orgpre < size && data[orgpre] == ' ')
- orgpre++;
-
- beg = prefix_uli(data, size);
- if (!beg)
- beg = prefix_oli(data, size);
-
- if (!beg)
- return 0;
-
- /* skipping to the beginning of the following line */
- end = beg;
- while (end < size && data[end - 1] != '\n')
- end++;
-
- /* getting working buffers */
- work = newbuf(doc, BUFFER_SPAN);
- inter = newbuf(doc, BUFFER_SPAN);
-
- /* putting the first line into the working buffer */
- hoedown_buffer_put(work, data + beg, end - beg);
- beg = end;
-
- /* process the following lines */
- while (beg < size) {
- size_t has_next_uli = 0, has_next_oli = 0;
-
- end++;
-
- while (end < size && data[end - 1] != '\n')
- end++;
-
- /* process an empty line */
- if (is_empty(data + beg, end - beg)) {
- in_empty = 1;
- beg = end;
- continue;
- }
-
- /* calculating the indentation */
- i = 0;
- while (i < 4 && beg + i < end && data[beg + i] == ' ')
- i++;
-
- pre = i;
-
- if (doc->ext_flags & HOEDOWN_EXT_FENCED_CODE) {
- if (is_codefence(data + beg + i, end - beg - i, NULL, NULL))
- in_fence = !in_fence;
- }
-
- /* Only check for new list items if we are **not** inside
- * a fenced code block */
- if (!in_fence) {
- has_next_uli = prefix_uli(data + beg + i, end - beg - i);
- has_next_oli = prefix_oli(data + beg + i, end - beg - i);
- }
-
- /* checking for a new item */
- if ((has_next_uli && !is_hrule(data + beg + i, end - beg - i)) || has_next_oli) {
- if (in_empty)
- has_inside_empty = 1;
-
- /* the following item must have the same (or less) indentation */
- if (pre <= orgpre) {
- /* if the following item has different list type, we end this list */
- if (in_empty && (
- ((*flags & HOEDOWN_LIST_ORDERED) && has_next_uli) ||
- (!(*flags & HOEDOWN_LIST_ORDERED) && has_next_oli)))
- *flags |= HOEDOWN_LI_END;
-
- break;
- }
-
- if (!sublist)
- sublist = work->size;
- }
- /* joining only indented stuff after empty lines;
- * note that now we only require 1 space of indentation
- * to continue a list */
- else if (in_empty && pre == 0) {
- *flags |= HOEDOWN_LI_END;
- break;
- }
-
- if (in_empty) {
- hoedown_buffer_putc(work, '\n');
- has_inside_empty = 1;
- in_empty = 0;
- }
-
- /* adding the line without prefix into the working buffer */
- hoedown_buffer_put(work, data + beg + i, end - beg - i);
- beg = end;
- }
-
- /* render of li contents */
- if (has_inside_empty)
- *flags |= HOEDOWN_LI_BLOCK;
-
- if (*flags & HOEDOWN_LI_BLOCK) {
- /* intermediate render of block li */
- if (sublist && sublist < work->size) {
- parse_block(inter, doc, work->data, sublist);
- parse_block(inter, doc, work->data + sublist, work->size - sublist);
- }
- else
- parse_block(inter, doc, work->data, work->size);
- } else {
- /* intermediate render of inline li */
- if (sublist && sublist < work->size) {
- parse_inline(inter, doc, work->data, sublist);
- parse_block(inter, doc, work->data + sublist, work->size - sublist);
- }
- else
- parse_inline(inter, doc, work->data, work->size);
- }
-
- /* render of li itself */
- if (doc->md.listitem)
- doc->md.listitem(ob, inter, *flags, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
- popbuf(doc, BUFFER_SPAN);
- return beg;
-}
-
-
-/* parse_list • parsing ordered or unordered list block */
-static size_t
-parse_list(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, hoedown_list_flags flags)
-{
- hoedown_buffer *work = 0;
- size_t i = 0, j;
-
- work = newbuf(doc, BUFFER_BLOCK);
-
- while (i < size) {
- j = parse_listitem(work, doc, data + i, size - i, &flags);
- i += j;
-
- if (!j || (flags & HOEDOWN_LI_END))
- break;
- }
-
- if (doc->md.list)
- doc->md.list(ob, work, flags, &doc->data);
- popbuf(doc, BUFFER_BLOCK);
- return i;
-}
-
-/* parse_atxheader • parsing of atx-style headers */
-static size_t
-parse_atxheader(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- size_t level = 0;
- size_t i, end, skip;
-
- while (level < size && level < 6 && data[level] == '#')
- level++;
-
- for (i = level; i < size && data[i] == ' '; i++);
-
- for (end = i; end < size && data[end] != '\n'; end++);
- skip = end;
-
- while (end && data[end - 1] == '#')
- end--;
-
- while (end && data[end - 1] == ' ')
- end--;
-
- if (end > i) {
- hoedown_buffer *work = newbuf(doc, BUFFER_SPAN);
-
- parse_inline(work, doc, data + i, end - i);
-
- if (doc->md.header)
- doc->md.header(ob, work, (int)level, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
- }
-
- return skip;
-}
-
-/* parse_footnote_def • parse a single footnote definition */
-static void
-parse_footnote_def(hoedown_buffer *ob, hoedown_document *doc, unsigned int num, uint8_t *data, size_t size)
-{
- hoedown_buffer *work = 0;
- work = newbuf(doc, BUFFER_SPAN);
-
- parse_block(work, doc, data, size);
-
- if (doc->md.footnote_def)
- doc->md.footnote_def(ob, work, num, &doc->data);
- popbuf(doc, BUFFER_SPAN);
-}
-
-/* parse_footnote_list • render the contents of the footnotes */
-static void
-parse_footnote_list(hoedown_buffer *ob, hoedown_document *doc, struct footnote_list *footnotes)
-{
- hoedown_buffer *work = 0;
- struct footnote_item *item;
- struct footnote_ref *ref;
-
- if (footnotes->count == 0)
- return;
-
- work = newbuf(doc, BUFFER_BLOCK);
-
- item = footnotes->head;
- while (item) {
- ref = item->ref;
- parse_footnote_def(work, doc, ref->num, ref->contents->data, ref->contents->size);
- item = item->next;
- }
-
- if (doc->md.footnotes)
- doc->md.footnotes(ob, work, &doc->data);
- popbuf(doc, BUFFER_BLOCK);
-}
-
-/* htmlblock_is_end • check for end of HTML block : </tag>( *)\n */
-/* returns tag length on match, 0 otherwise */
-/* assumes data starts with "<" */
-static size_t
-htmlblock_is_end(
- const char *tag,
- size_t tag_len,
- hoedown_document *doc,
- uint8_t *data,
- size_t size)
-{
- size_t i = tag_len + 3, w;
-
- /* try to match the end tag */
- /* note: we're not considering tags like "</tag >" which are still valid */
- if (i > size ||
- data[1] != '/' ||
- strncasecmp((char *)data + 2, tag, tag_len) != 0 ||
- data[tag_len + 2] != '>')
- return 0;
-
- /* rest of the line must be empty */
- if ((w = is_empty(data + i, size - i)) == 0 && i < size)
- return 0;
-
- return i + w;
-}
-
-/* htmlblock_find_end • try to find HTML block ending tag */
-/* returns the length on match, 0 otherwise */
-static size_t
-htmlblock_find_end(
- const char *tag,
- size_t tag_len,
- hoedown_document *doc,
- uint8_t *data,
- size_t size)
-{
- size_t i = 0, w;
-
- while (1) {
- while (i < size && data[i] != '<') i++;
- if (i >= size) return 0;
-
- w = htmlblock_is_end(tag, tag_len, doc, data + i, size - i);
- if (w) return i + w;
- i++;
- }
-}
-
-/* htmlblock_find_end_strict • try to find end of HTML block in strict mode */
-/* (it must be an unindented line, and have a blank line afterwads) */
-/* returns the length on match, 0 otherwise */
-static size_t
-htmlblock_find_end_strict(
- const char *tag,
- size_t tag_len,
- hoedown_document *doc,
- uint8_t *data,
- size_t size)
-{
- size_t i = 0, mark;
-
- while (1) {
- mark = i;
- while (i < size && data[i] != '\n') i++;
- if (i < size) i++;
- if (i == mark) return 0;
-
- if (data[mark] == ' ' && mark > 0) continue;
- mark += htmlblock_find_end(tag, tag_len, doc, data + mark, i - mark);
- if (mark == i && (is_empty(data + i, size - i) || i >= size)) break;
- }
-
- return i;
-}
-
-/* parse_htmlblock • parsing of inline HTML block */
-static size_t
-parse_htmlblock(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, int do_render)
-{
- hoedown_buffer work = { NULL, 0, 0, 0, NULL, NULL, NULL };
- size_t i, j = 0, tag_len, tag_end;
- const char *curtag = NULL;
-
- work.data = data;
-
- /* identification of the opening tag */
- if (size < 2 || data[0] != '<')
- return 0;
-
- i = 1;
- while (i < size && data[i] != '>' && data[i] != ' ')
- i++;
-
- if (i < size)
- curtag = hoedown_find_block_tag((char *)data + 1, (int)i - 1);
-
- /* handling of special cases */
- if (!curtag) {
-
- /* HTML comment, laxist form */
- if (size > 5 && data[1] == '!' && data[2] == '-' && data[3] == '-') {
- i = 5;
-
- while (i < size && !(data[i - 2] == '-' && data[i - 1] == '-' && data[i] == '>'))
- i++;
-
- i++;
-
- if (i < size)
- j = is_empty(data + i, size - i);
-
- if (j) {
- work.size = i + j;
- if (do_render && doc->md.blockhtml)
- doc->md.blockhtml(ob, &work, &doc->data);
- return work.size;
- }
- }
-
- /* HR, which is the only self-closing block tag considered */
- if (size > 4 && (data[1] == 'h' || data[1] == 'H') && (data[2] == 'r' || data[2] == 'R')) {
- i = 3;
- while (i < size && data[i] != '>')
- i++;
-
- if (i + 1 < size) {
- i++;
- j = is_empty(data + i, size - i);
- if (j) {
- work.size = i + j;
- if (do_render && doc->md.blockhtml)
- doc->md.blockhtml(ob, &work, &doc->data);
- return work.size;
- }
- }
- }
-
- /* no special case recognised */
- return 0;
- }
-
- /* looking for a matching closing tag in strict mode */
- tag_len = strlen(curtag);
- tag_end = htmlblock_find_end_strict(curtag, tag_len, doc, data, size);
-
- /* if not found, trying a second pass looking for indented match */
- /* but not if tag is "ins" or "del" (following original Markdown.pl) */
- if (!tag_end && strcmp(curtag, "ins") != 0 && strcmp(curtag, "del") != 0)
- tag_end = htmlblock_find_end(curtag, tag_len, doc, data, size);
-
- if (!tag_end)
- return 0;
-
- /* the end of the block has been found */
- work.size = tag_end;
- if (do_render && doc->md.blockhtml)
- doc->md.blockhtml(ob, &work, &doc->data);
-
- return tag_end;
-}
-
-static void
-parse_table_row(
- hoedown_buffer *ob,
- hoedown_document *doc,
- uint8_t *data,
- size_t size,
- size_t columns,
- hoedown_table_flags *col_data,
- hoedown_table_flags header_flag)
-{
- size_t i = 0, col, len;
- hoedown_buffer *row_work = 0;
-
- if (!doc->md.table_cell || !doc->md.table_row)
- return;
-
- row_work = newbuf(doc, BUFFER_SPAN);
-
- if (i < size && data[i] == '|')
- i++;
-
- for (col = 0; col < columns && i < size; ++col) {
- size_t cell_start, cell_end;
- hoedown_buffer *cell_work;
-
- cell_work = newbuf(doc, BUFFER_SPAN);
-
- while (i < size && _isspace(data[i]))
- i++;
-
- cell_start = i;
-
- len = find_emph_char(data + i, size - i, '|');
- i += len ? len : size - i;
-
- cell_end = i - 1;
-
- while (cell_end > cell_start && _isspace(data[cell_end]))
- cell_end--;
-
- parse_inline(cell_work, doc, data + cell_start, 1 + cell_end - cell_start);
- doc->md.table_cell(row_work, cell_work, col_data[col] | header_flag, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
- i++;
- }
-
- for (; col < columns; ++col) {
- hoedown_buffer empty_cell = { 0, 0, 0, 0, NULL, NULL, NULL };
- doc->md.table_cell(row_work, &empty_cell, col_data[col] | header_flag, &doc->data);
- }
-
- doc->md.table_row(ob, row_work, &doc->data);
-
- popbuf(doc, BUFFER_SPAN);
-}
-
-static size_t
-parse_table_header(
- hoedown_buffer *ob,
- hoedown_document *doc,
- uint8_t *data,
- size_t size,
- size_t *columns,
- hoedown_table_flags **column_data)
-{
- int pipes;
- size_t i = 0, col, header_end, under_end;
-
- pipes = 0;
- while (i < size && data[i] != '\n')
- if (data[i++] == '|')
- pipes++;
-
- if (i == size || pipes == 0)
- return 0;
-
- header_end = i;
-
- while (header_end > 0 && _isspace(data[header_end - 1]))
- header_end--;
-
- if (data[0] == '|')
- pipes--;
-
- if (header_end && data[header_end - 1] == '|')
- pipes--;
-
- if (pipes < 0)
- return 0;
-
- *columns = pipes + 1;
- *column_data = hoedown_calloc(*columns, sizeof(hoedown_table_flags));
-
- /* Parse the header underline */
- i++;
- if (i < size && data[i] == '|')
- i++;
-
- under_end = i;
- while (under_end < size && data[under_end] != '\n')
- under_end++;
-
- for (col = 0; col < *columns && i < under_end; ++col) {
- size_t dashes = 0;
-
- while (i < under_end && data[i] == ' ')
- i++;
-
- if (data[i] == ':') {
- i++; (*column_data)[col] |= HOEDOWN_TABLE_ALIGN_LEFT;
- dashes++;
- }
-
- while (i < under_end && data[i] == '-') {
- i++; dashes++;
- }
-
- if (i < under_end && data[i] == ':') {
- i++; (*column_data)[col] |= HOEDOWN_TABLE_ALIGN_RIGHT;
- dashes++;
- }
-
- while (i < under_end && data[i] == ' ')
- i++;
-
- if (i < under_end && data[i] != '|' && data[i] != '+')
- break;
-
- if (dashes < 3)
- break;
-
- i++;
- }
-
- if (col < *columns)
- return 0;
-
- parse_table_row(
- ob, doc, data,
- header_end,
- *columns,
- *column_data,
- HOEDOWN_TABLE_HEADER
- );
-
- return under_end + 1;
-}
-
-static size_t
-parse_table(
- hoedown_buffer *ob,
- hoedown_document *doc,
- uint8_t *data,
- size_t size)
-{
- size_t i;
-
- hoedown_buffer *work = 0;
- hoedown_buffer *header_work = 0;
- hoedown_buffer *body_work = 0;
-
- size_t columns;
- hoedown_table_flags *col_data = NULL;
-
- work = newbuf(doc, BUFFER_BLOCK);
- header_work = newbuf(doc, BUFFER_SPAN);
- body_work = newbuf(doc, BUFFER_BLOCK);
-
- i = parse_table_header(header_work, doc, data, size, &columns, &col_data);
- if (i > 0) {
-
- while (i < size) {
- size_t row_start;
- int pipes = 0;
-
- row_start = i;
-
- while (i < size && data[i] != '\n')
- if (data[i++] == '|')
- pipes++;
-
- if (pipes == 0 || i == size) {
- i = row_start;
- break;
- }
-
- parse_table_row(
- body_work,
- doc,
- data + row_start,
- i - row_start,
- columns,
- col_data, 0
- );
-
- i++;
- }
-
- if (doc->md.table_header)
- doc->md.table_header(work, header_work, &doc->data);
-
- if (doc->md.table_body)
- doc->md.table_body(work, body_work, &doc->data);
-
- if (doc->md.table)
- doc->md.table(ob, work, &doc->data);
- }
-
- free(col_data);
- popbuf(doc, BUFFER_SPAN);
- popbuf(doc, BUFFER_BLOCK);
- popbuf(doc, BUFFER_BLOCK);
- return i;
-}
-
-/* parse_block • parsing of one block, returning next uint8_t to parse */
-static void
-parse_block(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
-{
- size_t beg, end, i;
- uint8_t *txt_data;
- beg = 0;
-
- if (doc->work_bufs[BUFFER_SPAN].size +
- doc->work_bufs[BUFFER_BLOCK].size > doc->max_nesting)
- return;
-
- while (beg < size) {
- txt_data = data + beg;
- end = size - beg;
-
- if (is_atxheader(doc, txt_data, end))
- beg += parse_atxheader(ob, doc, txt_data, end);
-
- else if (data[beg] == '<' && doc->md.blockhtml &&
- (i = parse_htmlblock(ob, doc, txt_data, end, 1)) != 0)
- beg += i;
-
- else if ((i = is_empty(txt_data, end)) != 0)
- beg += i;
-
- else if (is_hrule(txt_data, end)) {
- if (doc->md.hrule)
- doc->md.hrule(ob, &doc->data);
-
- while (beg < size && data[beg] != '\n')
- beg++;
-
- beg++;
- }
-
- else if ((doc->ext_flags & HOEDOWN_EXT_FENCED_CODE) != 0 &&
- (i = parse_fencedcode(ob, doc, txt_data, end)) != 0)
- beg += i;
-
- else if ((doc->ext_flags & HOEDOWN_EXT_TABLES) != 0 &&
- (i = parse_table(ob, doc, txt_data, end)) != 0)
- beg += i;
-
- else if (prefix_quote(txt_data, end))
- beg += parse_blockquote(ob, doc, txt_data, end);
-
- else if (!(doc->ext_flags & HOEDOWN_EXT_DISABLE_INDENTED_CODE) && prefix_code(txt_data, end))
- beg += parse_blockcode(ob, doc, txt_data, end);
-
- else if (prefix_uli(txt_data, end))
- beg += parse_list(ob, doc, txt_data, end, 0);
-
- else if (prefix_oli(txt_data, end))
- beg += parse_list(ob, doc, txt_data, end, HOEDOWN_LIST_ORDERED);
-
- else
- beg += parse_paragraph(ob, doc, txt_data, end);
- }
-}
-
-
-
-/*********************
- * REFERENCE PARSING *
- *********************/
-
-/* is_footnote • returns whether a line is a footnote definition or not */
-static int
-is_footnote(const uint8_t *data, size_t beg, size_t end, size_t *last, struct footnote_list *list)
-{
- size_t i = 0;
- hoedown_buffer *contents = 0;
- size_t ind = 0;
- int in_empty = 0;
- size_t start = 0;
-
- size_t id_offset, id_end;
-
- /* up to 3 optional leading spaces */
- if (beg + 3 >= end) return 0;
- if (data[beg] == ' ') { i = 1;
- if (data[beg + 1] == ' ') { i = 2;
- if (data[beg + 2] == ' ') { i = 3;
- if (data[beg + 3] == ' ') return 0; } } }
- i += beg;
-
- /* id part: caret followed by anything between brackets */
- if (data[i] != '[') return 0;
- i++;
- if (i >= end || data[i] != '^') return 0;
- i++;
- id_offset = i;
- while (i < end && data[i] != '\n' && data[i] != '\r' && data[i] != ']')
- i++;
- if (i >= end || data[i] != ']') return 0;
- id_end = i;
-
- /* spacer: colon (space | tab)* newline? (space | tab)* */
- i++;
- if (i >= end || data[i] != ':') return 0;
- i++;
-
- /* getting content buffer */
- contents = hoedown_buffer_new(64);
-
- start = i;
-
- /* process lines similar to a list item */
- while (i < end) {
- while (i < end && data[i] != '\n' && data[i] != '\r') i++;
-
- /* process an empty line */
- if (is_empty(data + start, i - start)) {
- in_empty = 1;
- if (i < end && (data[i] == '\n' || data[i] == '\r')) {
- i++;
- if (i < end && data[i] == '\n' && data[i - 1] == '\r') i++;
- }
- start = i;
- continue;
- }
-
- /* calculating the indentation */
- ind = 0;
- while (ind < 4 && start + ind < end && data[start + ind] == ' ')
- ind++;
-
- /* joining only indented stuff after empty lines;
- * note that now we only require 1 space of indentation
- * to continue, just like lists */
- if (ind == 0) {
- if (start == id_end + 2 && data[start] == '\t') {}
- else break;
- }
- else if (in_empty) {
- hoedown_buffer_putc(contents, '\n');
- }
-
- in_empty = 0;
-
- /* adding the line into the content buffer */
- hoedown_buffer_put(contents, data + start + ind, i - start - ind);
- /* add carriage return */
- if (i < end) {
- hoedown_buffer_putc(contents, '\n');
- if (i < end && (data[i] == '\n' || data[i] == '\r')) {
- i++;
- if (i < end && data[i] == '\n' && data[i - 1] == '\r') i++;
- }
- }
- start = i;
- }
-
- if (last)
- *last = start;
-
- if (list) {
- struct footnote_ref *ref;
- ref = create_footnote_ref(list, data + id_offset, id_end - id_offset);
- if (!ref)
- return 0;
- if (!add_footnote_ref(list, ref)) {
- free_footnote_ref(ref);
- return 0;
- }
- ref->contents = contents;
- }
-
- return 1;
-}
-
-/* is_ref • returns whether a line is a reference or not */
-static int
-is_ref(const uint8_t *data, size_t beg, size_t end, size_t *last, struct link_ref **refs)
-{
-/* int n; */
- size_t i = 0;
- size_t id_offset, id_end;
- size_t link_offset, link_end;
- size_t title_offset, title_end;
- size_t line_end;
-
- /* up to 3 optional leading spaces */
- if (beg + 3 >= end) return 0;
- if (data[beg] == ' ') { i = 1;
- if (data[beg + 1] == ' ') { i = 2;
- if (data[beg + 2] == ' ') { i = 3;
- if (data[beg + 3] == ' ') return 0; } } }
- i += beg;
-
- /* id part: anything but a newline between brackets */
- if (data[i] != '[') return 0;
- i++;
- id_offset = i;
- while (i < end && data[i] != '\n' && data[i] != '\r' && data[i] != ']')
- i++;
- if (i >= end || data[i] != ']') return 0;
- id_end = i;
-
- /* spacer: colon (space | tab)* newline? (space | tab)* */
- i++;
- if (i >= end || data[i] != ':') return 0;
- i++;
- while (i < end && data[i] == ' ') i++;
- if (i < end && (data[i] == '\n' || data[i] == '\r')) {
- i++;
- if (i < end && data[i] == '\r' && data[i - 1] == '\n') i++; }
- while (i < end && data[i] == ' ') i++;
- if (i >= end) return 0;
-
- /* link: spacing-free sequence, optionally between angle brackets */
- if (data[i] == '<')
- i++;
-
- link_offset = i;
-
- while (i < end && data[i] != ' ' && data[i] != '\n' && data[i] != '\r')
- i++;
-
- if (data[i - 1] == '>') link_end = i - 1;
- else link_end = i;
-
- /* optional spacer: (space | tab)* (newline | '\'' | '"' | '(' ) */
- while (i < end && data[i] == ' ') i++;
- if (i < end && data[i] != '\n' && data[i] != '\r'
- && data[i] != '\'' && data[i] != '"' && data[i] != '(')
- return 0;
- line_end = 0;
- /* computing end-of-line */
- if (i >= end || data[i] == '\r' || data[i] == '\n') line_end = i;
- if (i + 1 < end && data[i] == '\n' && data[i + 1] == '\r')
- line_end = i + 1;
-
- /* optional (space|tab)* spacer after a newline */
- if (line_end) {
- i = line_end + 1;
- while (i < end && data[i] == ' ') i++; }
-
- /* optional title: any non-newline sequence enclosed in '"()
- alone on its line */
- title_offset = title_end = 0;
- if (i + 1 < end
- && (data[i] == '\'' || data[i] == '"' || data[i] == '(')) {
- i++;
- title_offset = i;
- /* looking for EOL */
- while (i < end && data[i] != '\n' && data[i] != '\r') i++;
- if (i + 1 < end && data[i] == '\n' && data[i + 1] == '\r')
- title_end = i + 1;
- else title_end = i;
- /* stepping back */
- i -= 1;
- while (i > title_offset && data[i] == ' ')
- i -= 1;
- if (i > title_offset
- && (data[i] == '\'' || data[i] == '"' || data[i] == ')')) {
- line_end = title_end;
- title_end = i; } }
-
- if (!line_end || link_end == link_offset)
- return 0; /* garbage after the link empty link */
-
- /* a valid ref has been found, filling-in return structures */
- if (last)
- *last = line_end;
-
- if (refs) {
- struct link_ref *ref;
-
- ref = add_link_ref(refs, data + id_offset, id_end - id_offset);
- if (!ref)
- return 0;
-
- ref->link = hoedown_buffer_new(link_end - link_offset);
- hoedown_buffer_put(ref->link, data + link_offset, link_end - link_offset);
-
- if (title_end > title_offset) {
- ref->title = hoedown_buffer_new(title_end - title_offset);
- hoedown_buffer_put(ref->title, data + title_offset, title_end - title_offset);
- }
- }
-
- return 1;
-}
-
-static void expand_tabs(hoedown_buffer *ob, const uint8_t *line, size_t size)
-{
- /* This code makes two assumptions:
- * - Input is valid UTF-8. (Any byte with top two bits 10 is skipped,
- * whether or not it is a valid UTF-8 continuation byte.)
- * - Input contains no combining characters. (Combining characters
- * should be skipped but are not.)
- */
- size_t i = 0, tab = 0;
-
- while (i < size) {
- size_t org = i;
-
- while (i < size && line[i] != '\t') {
- /* ignore UTF-8 continuation bytes */
- if ((line[i] & 0xc0) != 0x80)
- tab++;
- i++;
- }
-
- if (i > org)
- hoedown_buffer_put(ob, line + org, i - org);
-
- if (i >= size)
- break;
-
- do {
- hoedown_buffer_putc(ob, ' '); tab++;
- } while (tab % 4);
-
- i++;
- }
-}
-
-/**********************
- * EXPORTED FUNCTIONS *
- **********************/
-
-hoedown_document *
-hoedown_document_new(
- const hoedown_renderer *renderer,
- hoedown_extensions extensions,
- size_t max_nesting)
-{
- hoedown_document *doc = NULL;
-
- assert(max_nesting > 0 && renderer);
-
- doc = hoedown_malloc(sizeof(hoedown_document));
- memcpy(&doc->md, renderer, sizeof(hoedown_renderer));
-
- doc->data.opaque = renderer->opaque;
-
- hoedown_stack_init(&doc->work_bufs[BUFFER_BLOCK], 4);
- hoedown_stack_init(&doc->work_bufs[BUFFER_SPAN], 8);
-
- memset(doc->active_char, 0x0, 256);
-
- if (extensions & HOEDOWN_EXT_UNDERLINE && doc->md.underline) {
- doc->active_char['_'] = MD_CHAR_EMPHASIS;
- }
-
- if (doc->md.emphasis || doc->md.double_emphasis || doc->md.triple_emphasis) {
- doc->active_char['*'] = MD_CHAR_EMPHASIS;
- doc->active_char['_'] = MD_CHAR_EMPHASIS;
- if (extensions & HOEDOWN_EXT_STRIKETHROUGH)
- doc->active_char['~'] = MD_CHAR_EMPHASIS;
- if (extensions & HOEDOWN_EXT_HIGHLIGHT)
- doc->active_char['='] = MD_CHAR_EMPHASIS;
- }
-
- if (doc->md.codespan)
- doc->active_char['`'] = MD_CHAR_CODESPAN;
-
- if (doc->md.linebreak)
- doc->active_char['\n'] = MD_CHAR_LINEBREAK;
-
- if (doc->md.image || doc->md.link || doc->md.footnotes || doc->md.footnote_ref)
- doc->active_char['['] = MD_CHAR_LINK;
-
- doc->active_char['<'] = MD_CHAR_LANGLE;
- doc->active_char['\\'] = MD_CHAR_ESCAPE;
- doc->active_char['&'] = MD_CHAR_ENTITY;
-
- if (extensions & HOEDOWN_EXT_AUTOLINK) {
- doc->active_char[':'] = MD_CHAR_AUTOLINK_URL;
- doc->active_char['@'] = MD_CHAR_AUTOLINK_EMAIL;
- doc->active_char['w'] = MD_CHAR_AUTOLINK_WWW;
- }
-
- if (extensions & HOEDOWN_EXT_SUPERSCRIPT)
- doc->active_char['^'] = MD_CHAR_SUPERSCRIPT;
-
- if (extensions & HOEDOWN_EXT_QUOTE)
- doc->active_char['"'] = MD_CHAR_QUOTE;
-
- if (extensions & HOEDOWN_EXT_MATH)
- doc->active_char['$'] = MD_CHAR_MATH;
-
- /* Extension data */
- doc->ext_flags = extensions;
- doc->max_nesting = max_nesting;
- doc->in_link_body = 0;
-
- return doc;
-}
-
-void
-hoedown_document_render(hoedown_document *doc, hoedown_buffer *ob, const uint8_t *data, size_t size)
-{
- static const uint8_t UTF8_BOM[] = {0xEF, 0xBB, 0xBF};
-
- hoedown_buffer *text;
- size_t beg, end;
-
- int footnotes_enabled;
-
- text = hoedown_buffer_new(64);
-
- /* Preallocate enough space for our buffer to avoid expanding while copying */
- hoedown_buffer_grow(text, size);
-
- /* reset the references table */
- memset(&doc->refs, 0x0, REF_TABLE_SIZE * sizeof(void *));
-
- footnotes_enabled = doc->ext_flags & HOEDOWN_EXT_FOOTNOTES;
-
- /* reset the footnotes lists */
- if (footnotes_enabled) {
- memset(&doc->footnotes_found, 0x0, sizeof(doc->footnotes_found));
- memset(&doc->footnotes_used, 0x0, sizeof(doc->footnotes_used));
- }
-
- /* first pass: looking for references, copying everything else */
- beg = 0;
-
- /* Skip a possible UTF-8 BOM, even though the Unicode standard
- * discourages having these in UTF-8 documents */
- if (size >= 3 && memcmp(data, UTF8_BOM, 3) == 0)
- beg += 3;
-
- while (beg < size) /* iterating over lines */
- if (footnotes_enabled && is_footnote(data, beg, size, &end, &doc->footnotes_found))
- beg = end;
- else if (is_ref(data, beg, size, &end, doc->refs))
- beg = end;
- else { /* skipping to the next line */
- end = beg;
- while (end < size && data[end] != '\n' && data[end] != '\r')
- end++;
-
- /* adding the line body if present */
- if (end > beg)
- expand_tabs(text, data + beg, end - beg);
-
- while (end < size && (data[end] == '\n' || data[end] == '\r')) {
- /* add one \n per newline */
- if (data[end] == '\n' || (end + 1 < size && data[end + 1] != '\n'))
- hoedown_buffer_putc(text, '\n');
- end++;
- }
-
- beg = end;
- }
-
- /* pre-grow the output buffer to minimize allocations */
- hoedown_buffer_grow(ob, text->size + (text->size >> 1));
-
- /* second pass: actual rendering */
- if (doc->md.doc_header)
- doc->md.doc_header(ob, 0, &doc->data);
-
- if (text->size) {
- /* adding a final newline if not already present */
- if (text->data[text->size - 1] != '\n' && text->data[text->size - 1] != '\r')
- hoedown_buffer_putc(text, '\n');
-
- parse_block(ob, doc, text->data, text->size);
- }
-
- /* footnotes */
- if (footnotes_enabled)
- parse_footnote_list(ob, doc, &doc->footnotes_used);
-
- if (doc->md.doc_footer)
- doc->md.doc_footer(ob, 0, &doc->data);
-
- /* clean-up */
- hoedown_buffer_free(text);
- free_link_refs(doc->refs);
- if (footnotes_enabled) {
- free_footnote_list(&doc->footnotes_found, 1);
- free_footnote_list(&doc->footnotes_used, 0);
- }
-
- assert(doc->work_bufs[BUFFER_SPAN].size == 0);
- assert(doc->work_bufs[BUFFER_BLOCK].size == 0);
-}
-
-void
-hoedown_document_render_inline(hoedown_document *doc, hoedown_buffer *ob, const uint8_t *data, size_t size)
-{
- size_t i = 0, mark;
- hoedown_buffer *text = hoedown_buffer_new(64);
-
- /* reset the references table */
- memset(&doc->refs, 0x0, REF_TABLE_SIZE * sizeof(void *));
-
- /* first pass: expand tabs and process newlines */
- hoedown_buffer_grow(text, size);
- while (1) {
- mark = i;
- while (i < size && data[i] != '\n' && data[i] != '\r')
- i++;
-
- expand_tabs(text, data + mark, i - mark);
-
- if (i >= size)
- break;
-
- while (i < size && (data[i] == '\n' || data[i] == '\r')) {
- /* add one \n per newline */
- if (data[i] == '\n' || (i + 1 < size && data[i + 1] != '\n'))
- hoedown_buffer_putc(text, '\n');
- i++;
- }
- }
-
- /* second pass: actual rendering */
- hoedown_buffer_grow(ob, text->size + (text->size >> 1));
-
- if (doc->md.doc_header)
- doc->md.doc_header(ob, 1, &doc->data);
-
- parse_inline(ob, doc, text->data, text->size);
-
- if (doc->md.doc_footer)
- doc->md.doc_footer(ob, 1, &doc->data);
-
- /* clean-up */
- hoedown_buffer_free(text);
-
- assert(doc->work_bufs[BUFFER_SPAN].size == 0);
- assert(doc->work_bufs[BUFFER_BLOCK].size == 0);
-}
-
-void
-hoedown_document_free(hoedown_document *doc)
-{
- size_t i;
-
- for (i = 0; i < (size_t)doc->work_bufs[BUFFER_SPAN].asize; ++i)
- hoedown_buffer_free(doc->work_bufs[BUFFER_SPAN].item[i]);
-
- for (i = 0; i < (size_t)doc->work_bufs[BUFFER_BLOCK].asize; ++i)
- hoedown_buffer_free(doc->work_bufs[BUFFER_BLOCK].item[i]);
-
- hoedown_stack_uninit(&doc->work_bufs[BUFFER_SPAN]);
- hoedown_stack_uninit(&doc->work_bufs[BUFFER_BLOCK]);
-
- free(doc);
-}
generated by cgit (git 2.46.0) at 2025-02-10 02:31:37 +0000