Misc. improvements, added WOZ file support to floppy emulation

[apple2] / src / crc32.cpp

diff --git a/src/crc32.cpp b/src/crc32.cpp
index 8c263701cd62efc1e3be2475ba26e60d290f4a1e..0e8cb895ed6ea444547c8d30c4c2284a5df01330 100644 (file)
--- a/src/crc32.cpp
+++ b/src/crc32.cpp
@@ -1,14 +1,10 @@
 //
 // CRC32 support
 //
-// by David Raingeard & James Hammons
+// by James Hammons
 // (C) 2010-2018 Underground Software
 //
-// JLH = James Hammons <jlhamm@acm.org>
-//
-// Who  When        What
-// ---  ----------  -----------------------------------------------------------
-// JLH  01/16/2010  Created this log ;-)
+// Based on the original 1986 implementation by Gary S. Brown
 //
 
 #include "crc32.h"
@@ -51,13 +47,13 @@ static uint32_t crcTable[256] =
 };
 
 
-uint32_t CRC32(uint8_t * data, uint32_t length)
+uint32_t CRC32(const uint8_t * data, uint32_t length)
 {
        uint32_t crc = 0xFFFFFFFF;
 
        for(uint32_t i=0; i<length; i++)
                crc = crcTable[(crc ^ *data++) & 0xFF] ^ (crc >> 8);
 
-       return crc ^ 0xFFFFFFFF;
+       return ~crc;
 }