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-rw-r--r--quazip/quacrc32.cpp28
1 files changed, 28 insertions, 0 deletions
diff --git a/quazip/quacrc32.cpp b/quazip/quacrc32.cpp
new file mode 100644
index 00000000..9381f24c
--- /dev/null
+++ b/quazip/quacrc32.cpp
@@ -0,0 +1,28 @@
+#include "quacrc32.h"
+
+#include "zlib.h"
+
+QuaCrc32::QuaCrc32()
+{
+ reset();
+}
+
+quint32 QuaCrc32::calculate(const QByteArray &data)
+{
+ return crc32( crc32(0L, Z_NULL, 0), (const Bytef*)data.data(), data.size() );
+}
+
+void QuaCrc32::reset()
+{
+ checksum = crc32(0L, Z_NULL, 0);
+}
+
+void QuaCrc32::update(const QByteArray &buf)
+{
+ checksum = crc32( checksum, (const Bytef*)buf.data(), buf.size() );
+}
+
+quint32 QuaCrc32::value()
+{
+ return checksum;
+}