1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/libopenjpeg20/opj_intmath.h b/third_party/libopenjpeg20/opj_intmath.h
index cf97c15b12..ad13597661 100644
--- a/third_party/libopenjpeg20/opj_intmath.h
+++ b/third_party/libopenjpeg20/opj_intmath.h
@@ -96,6 +96,15 @@ static INLINE OPJ_UINT32 opj_uint_adds(OPJ_UINT32 a, OPJ_UINT32 b)
 }
 
 /**
+ Get the saturated difference of two unsigned integers
+ @return Returns saturated sum of a-b
+ */
+static INLINE OPJ_UINT32 opj_uint_subs(OPJ_UINT32 a, OPJ_UINT32 b)
+{
+    return (a >= b) ? a - b : 0;
+}
+
+/**
 Clamp an integer inside an interval
 @return
 <ul>
@@ -115,6 +124,28 @@ static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min,
     }
     return a;
 }
+
+/**
+Clamp an integer inside an interval
+@return
+<ul>
+<li>Returns a if (min < a < max)
+<li>Returns max if (a > max)
+<li>Returns min if (a < min)
+</ul>
+*/
+static INLINE OPJ_INT64 opj_int64_clamp(OPJ_INT64 a, OPJ_INT64 min,
+                                        OPJ_INT64 max)
+{
+    if (a < min) {
+        return min;
+    }
+    if (a > max) {
+        return max;
+    }
+    return a;
+}
+
 /**
 @return Get absolute value of integer
 */