.gitignore: Add a couple more automatically generated files.

[collection4.git] / src / utils_cgi.c

diff --git a/src/utils_cgi.c b/src/utils_cgi.c
index 1845788..9efa01f 100644 (file)
--- a/src/utils_cgi.c
+++ b/src/utils_cgi.c
@@ -288,4 +288,68 @@ int time_to_rfc1123 (time_t t, char *buffer, size_t buffer_size) /* {{{ */
   return (0);
 } /* }}} int time_to_rfc1123 */
 
+#define COPY_ENTITY(e) do {    \
+  size_t len = strlen (e);     \
+  if (dest_size < (len + 1)) \
+    break;                     \
+  strcpy (dest_ptr, (e));    \
+  dest_ptr += len;           \
+  dest_size -= len;          \
+} while (0)
+
+char *html_escape_copy (char *dest, const char *src, size_t n) /* {{{ */
+{
+  char *dest_ptr;
+  size_t dest_size;
+  size_t pos;
+
+  dest[0] = 0;
+  dest_ptr = dest;
+  dest_size = n;
+  for (pos = 0; src[pos] != 0; pos++)
+  {
+    if (src[pos] == '"')
+      COPY_ENTITY ("&quot;");
+    else if (src[pos] == '<')
+      COPY_ENTITY ("&lt;");
+    else if (src[pos] == '>')
+      COPY_ENTITY ("&gt;");
+    else if (src[pos] == '&')
+      COPY_ENTITY ("&amp;");
+    else
+    {
+      *dest_ptr = src[pos];
+      dest_ptr++;
+      dest_size--;
+      *dest_ptr = 0;
+    }
+
+    if (dest_size <= 1)
+      break;
+  }
+
+  return (src);
+} /* }}} char *html_escape_copy */
+
+#undef COPY_ENTITY
+
+char *html_escape_buffer (char *buffer, size_t buffer_size) /* {{{ */
+{
+  char tmp[buffer_size];
+
+  html_escape_copy (tmp, buffer, sizeof (tmp));
+  memcpy (buffer, tmp, buffer_size);
+
+  return (buffer);
+} /* }}} char *html_escape_buffer */
+
+char *html_escape (const char *string) /* {{{ */
+{
+  char buffer[4096];
+
+  html_escape_copy (buffer, string, sizeof (buffer));
+
+  return (strdup (buffer));
+} /* }}} char *html_escape */
+
 /* vim: set sw=2 sts=2 et fdm=marker : */