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/*
File : samplefiles.C
Project : LabPlot
Description : ROOT script to create test files for ROOT importer
-------------------------------------------------------------------------
SPDX-FileCopyrightText: 2018 Christoph Roick <chrisito@gmx.de>
SPDX-License-Identifier: GPL-2.0-or-later
*/
// ROOT test files are regenerated by calling 'root samplefiles.C'.
// Note that creation date and random numbers will be different in the new files.
void samplefiles()
{
TFile fBasic("basic_lz4.root", "RECREATE");
fBasic.SetCompressionAlgorithm(ROOT::kLZ4);
TH1D doubleHist("doubleHist", "", 100, -5., 5.);
doubleHist.Sumw2();
doubleHist.FillRandom("gaus", 10000);
doubleHist.Write();
TH1F floatHist("floatHist", "", 100, -5., 5.);
floatHist.Sumw2();
floatHist.FillRandom("gaus", 10000);
floatHist.Write();
TH1I intHist("intHist", "", 100, -5., 5.);
intHist.Sumw2();
intHist.FillRandom("gaus", 10000);
intHist.Write();
TH1S shortHist("shortHist", "", 100, -5., 5.);
shortHist.Sumw2();
shortHist.FillRandom("gaus", 10000);
shortHist.Write();
TH1C charHist("charHist", "", 100, -5., 5.);
charHist.Sumw2();
charHist.FillRandom("gaus", 1000);
charHist.Write();
fBasic.Close();
TFile fAdvanced("advanced_zlib.root", "RECREATE");
fAdvanced.SetCompressionAlgorithm(ROOT::kZLIB);
vector<double> borders;
for (size_t i = 0; i < 101; ++i)
borders.push_back(0.09 * i - 5. + 1.e-4 * i * i);
TH1D variableBinHist("variableBinHist", "", 100, borders.data());
variableBinHist.Sumw2();
variableBinHist.FillRandom("gaus", 10000);
variableBinHist.Write();
variableBinHist.FillRandom("gaus", 1000000);
variableBinHist.Write();
TTree tree("tree", "TTree title");
double d;
int i;
struct {
int a[2];
Double_t d;
float f;
} s;
tree.Branch("doubleTest", &d, "doubleTest/D");
tree.Branch("intTest", &i, "intTest/I");
tree.Branch("structTest", &s, "array[2]/I:double/D:float/F");
for (size_t j = 0; j < 10; ++j) {
d = j;
i = j;
s.f = 9 - j;
s.a[0] = j; s.a[1] = 2 * j;
s.d = s.f * s.f;
tree.Fill();
}
tree.Write();
TNtuple tuple("tuple", "TNtuple title", "x:y:z");
tuple.Fill(1., 2., 3.);
tuple.Write();
tuple.Fill(3., 4., 5.);
tuple.Write();
fAdvanced.Close();
ifstream infile("basic_lz4.root");
ofstream outfile("broken_basic.root");
char buffer[3000];
infile.read(buffer, 3000);
outfile.write(buffer, 3000);
}
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