add util/log and the tests

run_tests.sh

@@ -3,3 +3,8 @@ echo "./mtl/test_util_exe/verify_constants"
 ./mtl/test_util_exe/verify_constants
 
 echo ==================================================================
+
+echo "./mtl/test_util_exe/verify_log"
+./mtl/test_util_exe/verify_log
+
+echo ==================================================================

test_util/verify_log.cc

+#include "util/log.hh"
+#include "util/constants.hh"
+#include <string>
+#include <iostream>
+using std::cout;
+using std::endl;
+
+int main(){
+    std::string line("abcdefghehe");
+    logToFile log(constGlobalConstants.logFile);
+    log<<line<<"\n";
+    return 0;
+}

util/Makefrag

 OBJDIRS += util
-UTILSRC := onions.cc cryptdb_log.cc ctr.cc util.cc version.cc constants.cc
+UTILSRC := onions.cc cryptdb_log.cc ctr.cc util.cc version.cc constants.cc log.cc
 
 all:    $(OBJDIR)/libedbutil.so $(OBJDIR)/libedbutil.a
 

util/log.cc

+#include "util/log.hh"
+#include <assert.h>
+#include <stdio.h>
+
+logToFile::logToFile(std::string filename){
+    logfileHandler = fopen(filename.c_str(),"w");
+    assert(logfileHandler!=NULL);
+}
+
+logToFile&
+logToFile::operator<<(std::string record) {
+    fwrite(record.c_str(),1,record.size(),logfileHandler);
+    return *this;
+}
+
+logToFile::~logToFile(){
+    fclose(logfileHandler);
+}

util/log.hh

+#pragma once
+
+#include <string>
+
+class logToFile{
+    FILE* logfileHandler;
+public:
+    logToFile(std::string filename);
+    logToFile& operator<<(std::string record);
+    ~logToFile();
+};