Another linked list bites the dust.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3928 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/util.js.c

@@ -214,3 +214,28 @@ int tf_util_get_length(JSContext* context, JSValue value)
 	JS_FreeValue(context, length);
 	return result;
 }
+
+int tf_util_insert_index(const void* key, const void* base, size_t count, size_t size, int (*compare)(const void*, const void*))
+{
+	int lower = 0;
+	int upper = count;
+	while (lower < upper && lower < (int)count)
+	{
+		int guess = (lower + upper) / 2;
+		int result = compare(key, ((char*)base) + size * guess);
+		if (result < 0)
+		{
+			upper = guess;
+		}
+		else if (result > 0)
+		{
+			lower = guess + 1;
+		}
+		else
+		{
+			return guess;
+		}
+	};
+	return lower;
+}
+