From ca59c95c2627bf7703eefc204623371d2fd0a7d0 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 15 Jun 2015 17:47:49 +1000
Subject: [PATCH] image: add bounds check for index operators

---
 image.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/image.cpp b/image.cpp
index 6fcfea04..ef034cc0 100644
--- a/image.cpp
+++ b/image.cpp
@@ -258,6 +258,9 @@ template <typename T>
 T
 buffer<T>::operator[] (point<2,size_t> p) const
 {
+    CHECK_LT (p.x, w);
+    CHECK_LT (p.y, h);
+
     return begin ()[p.y * s + p.x];
 }
 
@@ -267,6 +270,9 @@ template <typename T>
 T&
 buffer<T>::operator[] (point<2,size_t> p)
 {
+    CHECK_LT (p.x, w);
+    CHECK_LT (p.y, h);
+
     return begin ()[p.y * s + p.x];
 }
 
@@ -276,6 +282,8 @@ template <typename T>
 T
 buffer<T>::operator[] (size_t idx) const
 {
+    CHECK_LT (idx, h * s);
+
     return begin ()[idx];
 }
 
@@ -285,6 +293,8 @@ template <typename T>
 T&
 buffer<T>::operator[] (size_t idx)
 {
+    CHECK_LT (idx, h * s);
+
     return begin ()[idx];
 }