diff --git a/private.h b/private.h
index f149223..fcbf02b 100644
--- a/private.h
+++ b/private.h
@@ -30,4 +30,36 @@ int blkmk_flsl(unsigned long n)
 	return i;
 }
 
+static inline
+uint16_t upk_u16le(const void * const bufp, const int offset)
+{
+	const uint8_t * const buf = bufp;
+	return (((uint16_t)buf[offset+0]) <<    0)
+	     | (((uint16_t)buf[offset+1]) <<    8);
+}
+
+static inline
+uint32_t upk_u32le(const void * const bufp, const int offset)
+{
+	const uint8_t * const buf = bufp;
+	return (((uint32_t)buf[offset+0]) <<    0)
+	     | (((uint32_t)buf[offset+1]) <<    8)
+	     | (((uint32_t)buf[offset+2]) << 0x10)
+	     | (((uint32_t)buf[offset+3]) << 0x18);
+}
+
+static inline
+uint64_t upk_u64le(const void * const bufp, const int offset)
+{
+	const uint8_t * const buf = bufp;
+	return (((uint64_t)buf[offset+0]) <<    0)
+	     | (((uint64_t)buf[offset+1]) <<    8)
+	     | (((uint64_t)buf[offset+2]) << 0x10)
+	     | (((uint64_t)buf[offset+3]) << 0x18)
+	     | (((uint64_t)buf[offset+4]) << 0x20)
+	     | (((uint64_t)buf[offset+5]) << 0x28)
+	     | (((uint64_t)buf[offset+6]) << 0x30)
+	     | (((uint64_t)buf[offset+7]) << 0x38);
+}
+
 #endif