STYLE: Add a lot of comments for the CMake build system

[openjpeg.git] / libopenjpeg / fix.c

diff --git a/libopenjpeg/fix.c b/libopenjpeg/fix.c
index 21466ae910bb40c3eeef84d75d4bb22a8e2978e6..e9ba82be8a39d3a886ebedafdffa388f6ccc5b8d 100644 (file)
--- a/libopenjpeg/fix.c
+++ b/libopenjpeg/fix.c
@@ -1,5 +1,9 @@
 /*
- * Copyright (c) 2001-2002, David Janssens
+ * Copyright (c) 2001-2003, David Janssens
+ * Copyright (c) 2002-2003, Yannick Verschueren
+ * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
+ * Copyright (c) 2005, Herv� Drolon, FreeImage Team
+ * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,16 +30,16 @@
 
 #include "fix.h"
 
-#ifdef WIN32
+#if defined(_MSC_VER) || defined(__BORLANDC__)
 #define int64 __int64
 #else
 #define int64 long long
 #endif
 
-/*
- * Multiply two fixed-precision rational numbers.
- */
-int fix_mul(int a, int b)
-{
-       return (int) ((int64) a * (int64) b >> 13);
+int fix_mul(int a, int b) {
+    int64 temp = (int64) a * (int64) b >> 12;
+    return (int) ((temp >> 1) + (temp & 1)) ;
 }
+
+
+