diff options
Diffstat (limited to 'depends/hoedown/src/autolink.c')
| -rw-r--r-- | depends/hoedown/src/autolink.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/depends/hoedown/src/autolink.c b/depends/hoedown/src/autolink.c deleted file mode 100644 index 9bc7fad5..00000000 --- a/depends/hoedown/src/autolink.c +++ /dev/null @@ -1,281 +0,0 @@ -#include "hoedown/autolink.h" - -#include <string.h> -#include <stdlib.h> -#include <stdio.h> -#include <ctype.h> - -#ifndef _MSC_VER -#include <strings.h> -#else -#define strncasecmp _strnicmp -#endif - -int -hoedown_autolink_is_safe(const uint8_t *data, size_t size) -{ - static const size_t valid_uris_count = 6; - static const char *valid_uris[] = { - "http://", "https://", "/", "#", "ftp://", "mailto:" - }; - static const size_t valid_uris_size[] = { 7, 8, 1, 1, 6, 7 }; - size_t i; - - for (i = 0; i < valid_uris_count; ++i) { - size_t len = valid_uris_size[i]; - - if (size > len && - strncasecmp((char *)data, valid_uris[i], len) == 0 && - isalnum(data[len])) - return 1; - } - - return 0; -} - -static size_t -autolink_delim(uint8_t *data, size_t link_end, size_t max_rewind, size_t size) -{ - uint8_t cclose, copen = 0; - size_t i; - - for (i = 0; i < link_end; ++i) - if (data[i] == '<') { - link_end = i; - break; - } - - while (link_end > 0) { - if (strchr("?!.,:", data[link_end - 1]) != NULL) - link_end--; - - else if (data[link_end - 1] == ';') { - size_t new_end = link_end - 2; - - while (new_end > 0 && isalpha(data[new_end])) - new_end--; - - if (new_end < link_end - 2 && data[new_end] == '&') - link_end = new_end; - else - link_end--; - } - else break; - } - - if (link_end == 0) - return 0; - - cclose = data[link_end - 1]; - - switch (cclose) { - case '"': copen = '"'; break; - case '\'': copen = '\''; break; - case ')': copen = '('; break; - case ']': copen = '['; break; - case '}': copen = '{'; break; - } - - if (copen != 0) { - size_t closing = 0; - size_t opening = 0; - size_t i = 0; - - /* Try to close the final punctuation sign in this same line; - * if we managed to close it outside of the URL, that means that it's - * not part of the URL. If it closes inside the URL, that means it - * is part of the URL. - * - * Examples: - * - * foo http://www.pokemon.com/Pikachu_(Electric) bar - * => http://www.pokemon.com/Pikachu_(Electric) - * - * foo (http://www.pokemon.com/Pikachu_(Electric)) bar - * => http://www.pokemon.com/Pikachu_(Electric) - * - * foo http://www.pokemon.com/Pikachu_(Electric)) bar - * => http://www.pokemon.com/Pikachu_(Electric)) - * - * (foo http://www.pokemon.com/Pikachu_(Electric)) bar - * => foo http://www.pokemon.com/Pikachu_(Electric) - */ - - while (i < link_end) { - if (data[i] == copen) - opening++; - else if (data[i] == cclose) - closing++; - - i++; - } - - if (closing != opening) - link_end--; - } - - return link_end; -} - -static size_t -check_domain(uint8_t *data, size_t size, int allow_short) -{ - size_t i, np = 0; - - if (!isalnum(data[0])) - return 0; - - for (i = 1; i < size - 1; ++i) { - if (strchr(".:", data[i]) != NULL) np++; - else if (!isalnum(data[i]) && data[i] != '-') break; - } - - if (allow_short) { - /* We don't need a valid domain in the strict sense (with - * least one dot; so just make sure it's composed of valid - * domain characters and return the length of the the valid - * sequence. */ - return i; - } else { - /* a valid domain needs to have at least a dot. - * that's as far as we get */ - return np ? i : 0; - } -} - -size_t -hoedown_autolink__www( - size_t *rewind_p, - hoedown_buffer *link, - uint8_t *data, - size_t max_rewind, - size_t size, - unsigned int flags) -{ - size_t link_end; - - if (max_rewind > 0 && !ispunct(data[-1]) && !isspace(data[-1])) - return 0; - - if (size < 4 || memcmp(data, "www.", strlen("www.")) != 0) - return 0; - - link_end = check_domain(data, size, 0); - - if (link_end == 0) - return 0; - - while (link_end < size && !isspace(data[link_end])) - link_end++; - - link_end = autolink_delim(data, link_end, max_rewind, size); - - if (link_end == 0) - return 0; - - hoedown_buffer_put(link, data, link_end); - *rewind_p = 0; - - return (int)link_end; -} - -size_t -hoedown_autolink__email( - size_t *rewind_p, - hoedown_buffer *link, - uint8_t *data, - size_t max_rewind, - size_t size, - unsigned int flags) -{ - size_t link_end, rewind; - int nb = 0, np = 0; - - for (rewind = 0; rewind < max_rewind; ++rewind) { - uint8_t c = data[-1 - rewind]; - - if (isalnum(c)) - continue; - - if (strchr(".+-_", c) != NULL) - continue; - - break; - } - - if (rewind == 0) - return 0; - - for (link_end = 0; link_end < size; ++link_end) { - uint8_t c = data[link_end]; - - if (isalnum(c)) - continue; - - if (c == '@') - nb++; - else if (c == '.' && link_end < size - 1) - np++; - else if (c != '-' && c != '_') - break; - } - - if (link_end < 2 || nb != 1 || np == 0 || - !isalpha(data[link_end - 1])) - return 0; - - link_end = autolink_delim(data, link_end, max_rewind, size); - - if (link_end == 0) - return 0; - - hoedown_buffer_put(link, data - rewind, link_end + rewind); - *rewind_p = rewind; - - return link_end; -} - -size_t -hoedown_autolink__url( - size_t *rewind_p, - hoedown_buffer *link, - uint8_t *data, - size_t max_rewind, - size_t size, - unsigned int flags) -{ - size_t link_end, rewind = 0, domain_len; - - if (size < 4 || data[1] != '/' || data[2] != '/') - return 0; - - while (rewind < max_rewind && isalpha(data[-1 - rewind])) - rewind++; - - if (!hoedown_autolink_is_safe(data - rewind, size + rewind)) - return 0; - - link_end = strlen("://"); - - domain_len = check_domain( - data + link_end, - size - link_end, - flags & HOEDOWN_AUTOLINK_SHORT_DOMAINS); - - if (domain_len == 0) - return 0; - - link_end += domain_len; - while (link_end < size && !isspace(data[link_end])) - link_end++; - - link_end = autolink_delim(data, link_end, max_rewind, size); - - if (link_end == 0) - return 0; - - hoedown_buffer_put(link, data - rewind, link_end + rewind); - *rewind_p = rewind; - - return link_end; -} |