From a477a1998c03bc0e7251463aff5486e3c0872d23 Mon Sep 17 00:00:00 2001
From: am <am@f440f766-f032-0410-8965-dc7d17de2ca0>
Date: Fri, 17 Jul 2009 17:36:23 +0000
Subject: Huge changes: -Created an application icon and one for archives
 -implemented database configuration dialog -implemented listeditor
 -implemented covereditor -implemented md5sum helper -implemented
 archivefilewidget -Debugging spree: fixed SQL-statements and ListModel

git-svn-id: file:///var/svn/repos2/shemov/trunk@389 f440f766-f032-0410-8965-dc7d17de2ca0
---
 helper.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'helper.cpp')

diff --git a/helper.cpp b/helper.cpp
index 116efa5..baaacbb 100644
--- a/helper.cpp
+++ b/helper.cpp
@@ -7,6 +7,14 @@
 
 #include <QString>
 #include <QByteArray>
+#include <QFileInfo>
+#include <QFile>
+
+#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1
+#include <md5.h>
+#include <files.h>
+#include <filters.h>
+#include <hex.h>
 
 #include "helper.h"
 
@@ -35,5 +43,37 @@ namespace Helper {
 			return retval;
 		}
 	}
+
+	const QString md5Sum(const QString &path){
+		QFileInfo info(path);
+		if(!info.exists() || !info.isFile()){
+			return QString();
+		}
+
+		using namespace CryptoPP;
+		Weak::MD5 hash;
+		std::string res;
+		QString retval;
+		if(info.size() < (5 * 1024 * 1024)){
+			FileSource f(qPrintable(path), true, new HashFilter(hash, new HexEncoder(new StringSink(res))));
+			retval = QString::fromStdString(res).toLower();
+		}else{
+			QFile file(path);
+			file.open(QIODevice::ReadOnly);
+			int offset = info.size() / 3;
+			file.seek(offset);
+			int numBytes = 512 * 1024;
+			char *data = new char[numBytes];
+			int read = file.read(data, numBytes);
+			if(read != numBytes){
+				delete [] data;
+				return QString();
+			}
+			StringSource s((byte*)data, numBytes, true, new HashFilter(hash, new HexEncoder(new StringSink(res))));
+			retval = QString::fromStdString(res).toLower();
+			delete [] data;
+		}
+		return retval;
+	}
 }
 
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