1 files changed, 38 insertions, 0 deletions
diff --git a/src/libtipidee/tipidee_util_htmlescape.c b/src/libtipidee/tipidee_util_htmlescape.c
new file mode 100644
index 0000000..1dfd552
--- /dev/null
+++ b/src/libtipidee/tipidee_util_htmlescape.c
@@ -0,0 +1,38 @@
+/* ISC license. */
+
+#include <stdlib.h>
+
+#include <tipidee/util.h>
+
+struct htmlescape_s
+{
+  char c ;
+  char const *code ;
+} ;
+
+static struct htmlescape_s const table[] =
+{
+  { .c = '\"', .code = "&quot;" },
+  { .c = '&', .code = "&amp;" },
+  { .c = '\'', .code = "&#39;" },
+  { .c = '<', .code = "&lt;" },
+  { .c = '>', .code = "&gt;" },
+} ;
+
+static int htmlescape_cmp (void const *a, void const *b)
+{
+  char aa = *((char const *)a) ;
+  char bb = ((struct htmlescape_s const *)b)->c ;
+  return aa < bb ? -1 : aa > bb ;
+}
+
+char const *tipidee_util_htmlescape (char const *s)
+{
+  struct htmlescape_s const *p = bsearch(
+    s,
+    table,
+    sizeof(table) / sizeof(struct htmlescape_s),
+    sizeof(struct htmlescape_s),
+    &htmlescape_cmp) ;
+  return p ? p->code : s ;
+}