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comparison markdown_converter/markdown_to_html.c @ 158:1c0878eb17de

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[MrJuneJune] Readme file gets compiled in server side.
author June Park <parkjune1995@gmail.com>
date Wed, 14 Jan 2026 07:59:19 -0800
parents cd35e600ae34
children 8c74204fd362
comparison
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157:2db6253f355d 158:1c0878eb17de
1 /**
2 * Markdown to HTML Converter - C Implementation
3 * Supports: headers, bold, italic, links, lists, code blocks, blockquotes, horizontal rules
4 */
5
6 #ifndef MARKDOWN_TO_HTML_H
7 #define MARKDOWN_TO_HTML_H
8
9 #include <stddef.h>
10
11 // Export macro for WASM/Emscripten
12 #ifdef __EMSCRIPTEN__
13 #include <emscripten.h>
14 #define MDAPI EMSCRIPTEN_KEEPALIVE
15 #else
16 #ifdef _WIN32
17 #ifdef MARKDOWN_EXPORTS
18 #define MDAPI __declspec(dllexport)
19 #else
20 #define MDAPI __declspec(dllimport)
21 #endif
22 #else
23 #define MDAPI extern
24 #endif
25 #endif
26
27 /**
28 * Convert markdown string to HTML string.
29 *
30 * @param markdown The input markdown string (null-terminated)
31 * @return Newly allocated HTML string. Caller must free with markdown_free().
32 * Returns NULL on allocation failure.
33 *
34 * Supported markdown features:
35 * - Headers: # H1, ## H2, ... ###### H6
36 * - Bold: **text** or __text__
37 * - Italic: *text* or _text_
38 * - Strikethrough: ~~text~~
39 * - Links: [text](url)
40 * - Images: ![alt](url)
41 * - Inline code: `code`
42 * - Code blocks: ```code```
43 * - Unordered lists: -, *, +
44 * - Ordered lists: 1., 2., etc.
45 * - Blockquotes: > text
46 * - Horizontal rules: ---, ***, ___
47 */
48 MDAPI char *markdown_to_html(const char *markdown);
49
50 /**
51 * Free HTML string returned by markdown_to_html.
52 *
53 * @param html The HTML string to free
54 */
55 MDAPI void markdown_free(char *html);
56
57 /**
58 * Get length of HTML string (useful for WASM memory operations).
59 *
60 * @param html The HTML string
61 * @return Length of the string, or 0 if NULL
62 */
63 MDAPI size_t markdown_get_length(const char *html);
64
65 #endif // MARKDOWN_TO_HTML_H
66 #include <string.h> 1 #include <string.h>
67 #include <stdlib.h> 2 #include <stdlib.h>
68 #include <stdio.h> 3 #include <stdio.h>
69 #include <ctype.h> 4 #include <ctype.h>
70 5 #include "markdown_converter/markdown_to_html.h"
71 #define INITIAL_BUFFER_SIZE 4096 6
7 #define INITIAL_BUFFER_SIZE 1024 * 1024 // 1MB
72 8
73 // String buffer for building HTML output 9 // String buffer for building HTML output
74 typedef struct { 10 typedef struct {
75 char *data; 11 char *data;
76 size_t length; 12 size_t length;
317 i = end + 1; 253 i = end + 1;
318 continue; 254 continue;
319 } 255 }
320 } 256 }
321 257
258 // This might not be needed for now.
322 // HTML escape special characters 259 // HTML escape special characters
323 if (text[i] == '<') { 260 // if (text[i] == '<') {
324 buffer_append(buf, "&lt;"); 261 // buffer_append(buf, "&lt;");
325 } else if (text[i] == '>') { 262 // } else if (text[i] == '>') {
326 buffer_append(buf, "&gt;"); 263 // buffer_append(buf, "&gt;");
327 } else if (text[i] == '&') { 264 // } else if (text[i] == '&') {
328 buffer_append(buf, "&amp;"); 265 // buffer_append(buf, "&amp;");
329 } else { 266 // } else {
330 buffer_append_char(buf, text[i]); 267 // buffer_append_char(buf, text[i]);
331 } 268 // }
269 buffer_append_char(buf, text[i]);
332 i++; 270 i++;
333 } 271 }
334 } 272 }
335 273
336 // Convert markdown to HTML 274 // Convert markdown to HTML