Spectral/include/cmark/houdini_html_e.c

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C
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#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "houdini.h"
/**
* According to the OWASP rules:
*
* & --> &amp;
* < --> &lt;
* > --> &gt;
* " --> &quot;
* ' --> &#x27; &apos; is not recommended
* / --> &#x2F; forward slash is included as it helps end an HTML entity
*
*/
static const char HTML_ESCAPE_TABLE[] = {
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, 1, 0, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 4,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 6, 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, 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 const char *HTML_ESCAPES[] = {"", "&quot;", "&amp;", "&#39;",
"&#47;", "&lt;", "&gt;"};
int houdini_escape_html0(cmark_strbuf *ob, const uint8_t *src, bufsize_t size,
int secure) {
bufsize_t i = 0, org, esc = 0;
while (i < size) {
org = i;
while (i < size && (esc = HTML_ESCAPE_TABLE[src[i]]) == 0)
i++;
if (i > org)
cmark_strbuf_put(ob, src + org, i - org);
/* escaping */
if (unlikely(i >= size))
break;
/* The forward slash is only escaped in secure mode */
if ((src[i] == '/' || src[i] == '\'') && !secure) {
cmark_strbuf_putc(ob, src[i]);
} else {
cmark_strbuf_puts(ob, HTML_ESCAPES[esc]);
}
i++;
}
return 1;
}
int houdini_escape_html(cmark_strbuf *ob, const uint8_t *src, bufsize_t size) {
return houdini_escape_html0(ob, src, size, 1);
}