misc/quazip/quaadler32.cpp
author Wolfgang Steffens <WolfgangSteff@gmail.com>
Tue, 22 May 2012 09:25:03 +0200
changeset 7111 5ba5a92d74fb
parent 5752 ea95ee97c805
permissions -rw-r--r--
Replaced matrix related FFP code with explicit matrix calculations. The modelview matrices now get uploaded at a single point via glLoadMatrix4 rather than using the GL1 matrix stack. In the GL2 variant this will become a uniform upload.

#include "quaadler32.h"

#include "zlib.h"

QuaAdler32::QuaAdler32()
{
	reset();
}

quint32 QuaAdler32::calculate(const QByteArray &data)
{
	return adler32( adler32(0L, Z_NULL, 0), (const Bytef*)data.data(), data.size() );
}

void QuaAdler32::reset()
{
	checksum = adler32(0L, Z_NULL, 0);
}

void QuaAdler32::update(const QByteArray &buf)
{
	checksum = adler32( checksum, (const Bytef*)buf.data(), buf.size() );
}

quint32 QuaAdler32::value()
{
	return checksum;
}