libgta 1.0.5 Read and Write Generic Tagged Array (GTA) files

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Examples written in C++: Stream-based input/output
/* This file is in the public domain. */
#include <iostream>
#include <fstream>
#include <exception>
#include <limits>
#include <vector>
#include <gta/gta.hpp>
/* This example transforms an input GTA into an output GTA.
* It reads, manipulates and writes the array elements one at a time; the array
* data does not have to fit into memory. */
int main(void)
{
try {
/* Initialize input */
std::ifstream instream("input.gta", std::ios::in | std::ios::binary);
gta::header inheader;
gta::io_state instate;
/* Initialize output */
std::ofstream outstream("output.gta", std::ios::out | std::ios::binary);
gta::header outheader;
gta::io_state outstate;
/* Copy the GTA header */
inheader.read_from(instream);
outheader = inheader;
/* In this example, the output GTA is always uncompressed */
outheader.set_compression(gta::none);
outheader.write_to(outstream);
/* Copy the array data */
if (inheader.element_size() > std::numeric_limits<size_t>::max()) {
throw std::exception();
}
std::vector<char> element(inheader.element_size());
for (uintmax_t i = 0; i < inheader.elements(); i++) {
inheader.read_elements(instate, instream, 1, &(element[0]));
/* ... manipulate the element ... */
outheader.write_elements(outstate, outstream, 1, &(element[0]));
}
}
catch (std::exception &e) {
std::cerr << e.what() << std::endl;
return 1;
}
return 0;
}