misc/quazip/quacrc32.cpp
author unc0rr
Mon, 12 Sep 2011 21:51:14 +0400
changeset 5879 42cf124c305b
parent 5752 ea95ee97c805
permissions -rw-r--r--
This should check if Qt provides zlib functions, and adds zlib dependency in case of zlibless Qt. Tested with Qt providing zlib functions only.

#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;
}