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authorPetr Mrázek <peterix@gmail.com>2016-04-10 15:53:05 +0200
committerPetr Mrázek <peterix@gmail.com>2016-05-01 00:00:14 +0200
commitb6d455a02bd338e9dc0faa09d4d8177ecd8d569a (patch)
tree41982bca1ede50049f2f8c7109dd18edeefde6d0 /libraries/hoedown/src/html_smartypants.c
parent47e37635f50c09b4f9a9ee7699e3120bab3e4088 (diff)
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NOISSUE reorganize and document libraries
Diffstat (limited to 'libraries/hoedown/src/html_smartypants.c')
-rw-r--r--libraries/hoedown/src/html_smartypants.c435
1 files changed, 435 insertions, 0 deletions
diff --git a/libraries/hoedown/src/html_smartypants.c b/libraries/hoedown/src/html_smartypants.c
new file mode 100644
index 00000000..e24b6bf0
--- /dev/null
+++ b/libraries/hoedown/src/html_smartypants.c
@@ -0,0 +1,435 @@
+#include "hoedown/html.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#ifdef _MSC_VER
+#define snprintf _snprintf
+#endif
+
+struct smartypants_data {
+ int in_squote;
+ int in_dquote;
+};
+
+static size_t smartypants_cb__ltag(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__dquote(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__amp(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__period(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__number(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__dash(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__parens(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__squote(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__backtick(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+static size_t smartypants_cb__escape(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size);
+
+static size_t (*smartypants_cb_ptrs[])
+ (hoedown_buffer *, struct smartypants_data *, uint8_t, const uint8_t *, size_t) =
+{
+ NULL, /* 0 */
+ smartypants_cb__dash, /* 1 */
+ smartypants_cb__parens, /* 2 */
+ smartypants_cb__squote, /* 3 */
+ smartypants_cb__dquote, /* 4 */
+ smartypants_cb__amp, /* 5 */
+ smartypants_cb__period, /* 6 */
+ smartypants_cb__number, /* 7 */
+ smartypants_cb__ltag, /* 8 */
+ smartypants_cb__backtick, /* 9 */
+ smartypants_cb__escape, /* 10 */
+};
+
+static const uint8_t smartypants_cb_chars[UINT8_MAX+1] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 4, 0, 0, 0, 5, 3, 2, 0, 0, 0, 0, 1, 6, 0,
+ 0, 7, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0, 0, 0,
+ 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+static int
+word_boundary(uint8_t c)
+{
+ return c == 0 || isspace(c) || ispunct(c);
+}
+
+/*
+ If 'text' begins with any kind of single quote (e.g. "'" or "&apos;" etc.),
+ returns the length of the sequence of characters that makes up the single-
+ quote. Otherwise, returns zero.
+*/
+static size_t
+squote_len(const uint8_t *text, size_t size)
+{
+ static char* single_quote_list[] = { "'", "&#39;", "&#x27;", "&apos;", NULL };
+ char** p;
+
+ for (p = single_quote_list; *p; ++p) {
+ size_t len = strlen(*p);
+ if (size >= len && memcmp(text, *p, len) == 0) {
+ return len;
+ }
+ }
+
+ return 0;
+}
+
+/* Converts " or ' at very beginning or end of a word to left or right quote */
+static int
+smartypants_quotes(hoedown_buffer *ob, uint8_t previous_char, uint8_t next_char, uint8_t quote, int *is_open)
+{
+ char ent[8];
+
+ if (*is_open && !word_boundary(next_char))
+ return 0;
+
+ if (!(*is_open) && !word_boundary(previous_char))
+ return 0;
+
+ snprintf(ent, sizeof(ent), "&%c%cquo;", (*is_open) ? 'r' : 'l', quote);
+ *is_open = !(*is_open);
+ hoedown_buffer_puts(ob, ent);
+ return 1;
+}
+
+/*
+ Converts ' to left or right single quote; but the initial ' might be in
+ different forms, e.g. &apos; or &#39; or &#x27;.
+ 'squote_text' points to the original single quote, and 'squote_size' is its length.
+ 'text' points at the last character of the single-quote, e.g. ' or ;
+*/
+static size_t
+smartypants_squote(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size,
+ const uint8_t *squote_text, size_t squote_size)
+{
+ if (size >= 2) {
+ uint8_t t1 = tolower(text[1]);
+ size_t next_squote_len = squote_len(text+1, size-1);
+
+ /* convert '' to &ldquo; or &rdquo; */
+ if (next_squote_len > 0) {
+ uint8_t next_char = (size > 1+next_squote_len) ? text[1+next_squote_len] : 0;
+ if (smartypants_quotes(ob, previous_char, next_char, 'd', &smrt->in_dquote))
+ return next_squote_len;
+ }
+
+ /* Tom's, isn't, I'm, I'd */
+ if ((t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') &&
+ (size == 3 || word_boundary(text[2]))) {
+ HOEDOWN_BUFPUTSL(ob, "&rsquo;");
+ return 0;
+ }
+
+ /* you're, you'll, you've */
+ if (size >= 3) {
+ uint8_t t2 = tolower(text[2]);
+
+ if (((t1 == 'r' && t2 == 'e') ||
+ (t1 == 'l' && t2 == 'l') ||
+ (t1 == 'v' && t2 == 'e')) &&
+ (size == 4 || word_boundary(text[3]))) {
+ HOEDOWN_BUFPUTSL(ob, "&rsquo;");
+ return 0;
+ }
+ }
+ }
+
+ if (smartypants_quotes(ob, previous_char, size > 0 ? text[1] : 0, 's', &smrt->in_squote))
+ return 0;
+
+ hoedown_buffer_put(ob, squote_text, squote_size);
+ return 0;
+}
+
+/* Converts ' to left or right single quote. */
+static size_t
+smartypants_cb__squote(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ return smartypants_squote(ob, smrt, previous_char, text, size, text, 1);
+}
+
+/* Converts (c), (r), (tm) */
+static size_t
+smartypants_cb__parens(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (size >= 3) {
+ uint8_t t1 = tolower(text[1]);
+ uint8_t t2 = tolower(text[2]);
+
+ if (t1 == 'c' && t2 == ')') {
+ HOEDOWN_BUFPUTSL(ob, "&copy;");
+ return 2;
+ }
+
+ if (t1 == 'r' && t2 == ')') {
+ HOEDOWN_BUFPUTSL(ob, "&reg;");
+ return 2;
+ }
+
+ if (size >= 4 && t1 == 't' && t2 == 'm' && text[3] == ')') {
+ HOEDOWN_BUFPUTSL(ob, "&trade;");
+ return 3;
+ }
+ }
+
+ hoedown_buffer_putc(ob, text[0]);
+ return 0;
+}
+
+/* Converts "--" to em-dash, etc. */
+static size_t
+smartypants_cb__dash(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (size >= 3 && text[1] == '-' && text[2] == '-') {
+ HOEDOWN_BUFPUTSL(ob, "&mdash;");
+ return 2;
+ }
+
+ if (size >= 2 && text[1] == '-') {
+ HOEDOWN_BUFPUTSL(ob, "&ndash;");
+ return 1;
+ }
+
+ hoedown_buffer_putc(ob, text[0]);
+ return 0;
+}
+
+/* Converts &quot; etc. */
+static size_t
+smartypants_cb__amp(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ size_t len;
+ if (size >= 6 && memcmp(text, "&quot;", 6) == 0) {
+ if (smartypants_quotes(ob, previous_char, size >= 7 ? text[6] : 0, 'd', &smrt->in_dquote))
+ return 5;
+ }
+
+ len = squote_len(text, size);
+ if (len > 0) {
+ return (len-1) + smartypants_squote(ob, smrt, previous_char, text+(len-1), size-(len-1), text, len);
+ }
+
+ if (size >= 4 && memcmp(text, "&#0;", 4) == 0)
+ return 3;
+
+ hoedown_buffer_putc(ob, '&');
+ return 0;
+}
+
+/* Converts "..." to ellipsis */
+static size_t
+smartypants_cb__period(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (size >= 3 && text[1] == '.' && text[2] == '.') {
+ HOEDOWN_BUFPUTSL(ob, "&hellip;");
+ return 2;
+ }
+
+ if (size >= 5 && text[1] == ' ' && text[2] == '.' && text[3] == ' ' && text[4] == '.') {
+ HOEDOWN_BUFPUTSL(ob, "&hellip;");
+ return 4;
+ }
+
+ hoedown_buffer_putc(ob, text[0]);
+ return 0;
+}
+
+/* Converts `` to opening double quote */
+static size_t
+smartypants_cb__backtick(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (size >= 2 && text[1] == '`') {
+ if (smartypants_quotes(ob, previous_char, size >= 3 ? text[2] : 0, 'd', &smrt->in_dquote))
+ return 1;
+ }
+
+ hoedown_buffer_putc(ob, text[0]);
+ return 0;
+}
+
+/* Converts 1/2, 1/4, 3/4 */
+static size_t
+smartypants_cb__number(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (word_boundary(previous_char) && size >= 3) {
+ if (text[0] == '1' && text[1] == '/' && text[2] == '2') {
+ if (size == 3 || word_boundary(text[3])) {
+ HOEDOWN_BUFPUTSL(ob, "&frac12;");
+ return 2;
+ }
+ }
+
+ if (text[0] == '1' && text[1] == '/' && text[2] == '4') {
+ if (size == 3 || word_boundary(text[3]) ||
+ (size >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h')) {
+ HOEDOWN_BUFPUTSL(ob, "&frac14;");
+ return 2;
+ }
+ }
+
+ if (text[0] == '3' && text[1] == '/' && text[2] == '4') {
+ if (size == 3 || word_boundary(text[3]) ||
+ (size >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's')) {
+ HOEDOWN_BUFPUTSL(ob, "&frac34;");
+ return 2;
+ }
+ }
+ }
+
+ hoedown_buffer_putc(ob, text[0]);
+ return 0;
+}
+
+/* Converts " to left or right double quote */
+static size_t
+smartypants_cb__dquote(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (!smartypants_quotes(ob, previous_char, size > 0 ? text[1] : 0, 'd', &smrt->in_dquote))
+ HOEDOWN_BUFPUTSL(ob, "&quot;");
+
+ return 0;
+}
+
+static size_t
+smartypants_cb__ltag(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ static const char *skip_tags[] = {
+ "pre", "code", "var", "samp", "kbd", "math", "script", "style"
+ };
+ static const size_t skip_tags_count = 8;
+
+ size_t tag, i = 0;
+
+ /* This is a comment. Copy everything verbatim until --> or EOF is seen. */
+ if (i + 4 < size && memcmp(text, "<!--", 4) == 0) {
+ i += 4;
+ while (i + 3 < size && memcmp(text + i, "-->", 3) != 0)
+ i++;
+ i += 3;
+ hoedown_buffer_put(ob, text, i + 1);
+ return i;
+ }
+
+ while (i < size && text[i] != '>')
+ i++;
+
+ for (tag = 0; tag < skip_tags_count; ++tag) {
+ if (hoedown_html_is_tag(text, size, skip_tags[tag]) == HOEDOWN_HTML_TAG_OPEN)
+ break;
+ }
+
+ if (tag < skip_tags_count) {
+ for (;;) {
+ while (i < size && text[i] != '<')
+ i++;
+
+ if (i == size)
+ break;
+
+ if (hoedown_html_is_tag(text + i, size - i, skip_tags[tag]) == HOEDOWN_HTML_TAG_CLOSE)
+ break;
+
+ i++;
+ }
+
+ while (i < size && text[i] != '>')
+ i++;
+ }
+
+ hoedown_buffer_put(ob, text, i + 1);
+ return i;
+}
+
+static size_t
+smartypants_cb__escape(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t previous_char, const uint8_t *text, size_t size)
+{
+ if (size < 2)
+ return 0;
+
+ switch (text[1]) {
+ case '\\':
+ case '"':
+ case '\'':
+ case '.':
+ case '-':
+ case '`':
+ hoedown_buffer_putc(ob, text[1]);
+ return 1;
+
+ default:
+ hoedown_buffer_putc(ob, '\\');
+ return 0;
+ }
+}
+
+#if 0
+static struct {
+ uint8_t c0;
+ const uint8_t *pattern;
+ const uint8_t *entity;
+ int skip;
+} smartypants_subs[] = {
+ { '\'', "'s>", "&rsquo;", 0 },
+ { '\'', "'t>", "&rsquo;", 0 },
+ { '\'', "'re>", "&rsquo;", 0 },
+ { '\'', "'ll>", "&rsquo;", 0 },
+ { '\'', "'ve>", "&rsquo;", 0 },
+ { '\'', "'m>", "&rsquo;", 0 },
+ { '\'', "'d>", "&rsquo;", 0 },
+ { '-', "--", "&mdash;", 1 },
+ { '-', "<->", "&ndash;", 0 },
+ { '.', "...", "&hellip;", 2 },
+ { '.', ". . .", "&hellip;", 4 },
+ { '(', "(c)", "&copy;", 2 },
+ { '(', "(r)", "&reg;", 2 },
+ { '(', "(tm)", "&trade;", 3 },
+ { '3', "<3/4>", "&frac34;", 2 },
+ { '3', "<3/4ths>", "&frac34;", 2 },
+ { '1', "<1/2>", "&frac12;", 2 },
+ { '1', "<1/4>", "&frac14;", 2 },
+ { '1', "<1/4th>", "&frac14;", 2 },
+ { '&', "&#0;", 0, 3 },
+};
+#endif
+
+void
+hoedown_html_smartypants(hoedown_buffer *ob, const uint8_t *text, size_t size)
+{
+ size_t i;
+ struct smartypants_data smrt = {0, 0};
+
+ if (!text)
+ return;
+
+ hoedown_buffer_grow(ob, size);
+
+ for (i = 0; i < size; ++i) {
+ size_t org;
+ uint8_t action = 0;
+
+ org = i;
+ while (i < size && (action = smartypants_cb_chars[text[i]]) == 0)
+ i++;
+
+ if (i > org)
+ hoedown_buffer_put(ob, text + org, i - org);
+
+ if (i < size) {
+ i += smartypants_cb_ptrs[(int)action]
+ (ob, &smrt, i ? text[i - 1] : 0, text + i, size - i);
+ }
+ }
+}