mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-09 23:00:57 +00:00
98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
|
|
#include <qpdf/Pl_Count.hh>
|
|
#include <qpdf/Pl_Flate.hh>
|
|
#include <qpdf/Pl_StdioFile.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
|
|
#include <cstdlib>
|
|
#include <iostream>
|
|
|
|
void
|
|
run(char const* filename)
|
|
{
|
|
std::string n1 = std::string(filename) + ".1";
|
|
std::string n2 = std::string(filename) + ".2";
|
|
std::string n3 = std::string(filename) + ".3";
|
|
|
|
FILE* o1 = QUtil::safe_fopen(n1.c_str(), "wb");
|
|
FILE* o2 = QUtil::safe_fopen(n2.c_str(), "wb");
|
|
FILE* o3 = QUtil::safe_fopen(n3.c_str(), "wb");
|
|
Pipeline* out1 = new Pl_StdioFile("o1", o1);
|
|
Pipeline* out2 = new Pl_StdioFile("o2", o2);
|
|
Pipeline* out3 = new Pl_StdioFile("o3", o3);
|
|
|
|
// Compress the file
|
|
Pipeline* def1 = new Pl_Flate("def1", out1, Pl_Flate::a_deflate);
|
|
|
|
// Decompress the file
|
|
Pipeline* inf2 = new Pl_Flate("inf2", out2, Pl_Flate::a_inflate);
|
|
|
|
// Count bytes written to o3
|
|
auto* count3 = new Pl_Count("count3", out3);
|
|
|
|
// Do both simultaneously
|
|
Pipeline* inf3 = new Pl_Flate("inf3", count3, Pl_Flate::a_inflate);
|
|
Pipeline* def3 = new Pl_Flate("def3", inf3, Pl_Flate::a_deflate);
|
|
|
|
FILE* in1 = QUtil::safe_fopen(filename, "rb");
|
|
unsigned char buf[1024];
|
|
size_t len;
|
|
while ((len = fread(buf, 1, sizeof(buf), in1)) > 0) {
|
|
// Write to the compression pipeline
|
|
def1->write(buf, len);
|
|
|
|
// Write to the both pipeline
|
|
def3->write(buf, len);
|
|
}
|
|
fclose(in1);
|
|
|
|
def1->finish();
|
|
delete def1;
|
|
delete out1;
|
|
fclose(o1);
|
|
|
|
def3->finish();
|
|
|
|
std::cout << "bytes written to o3: " << count3->getCount() << std::endl;
|
|
|
|
delete def3;
|
|
delete inf3;
|
|
delete count3;
|
|
delete out3;
|
|
fclose(o3);
|
|
|
|
// Now read the compressed data and write to the output uncompress pipeline
|
|
FILE* in2 = QUtil::safe_fopen(n1.c_str(), "rb");
|
|
while ((len = fread(buf, 1, sizeof(buf), in2)) > 0) {
|
|
inf2->write(buf, len);
|
|
}
|
|
fclose(in2);
|
|
|
|
inf2->finish();
|
|
delete inf2;
|
|
delete out2;
|
|
fclose(o2);
|
|
|
|
// At this point, filename, filename.2, and filename.3 should have
|
|
// identical contents. filename.1 should be a compressed version.
|
|
|
|
std::cout << "done" << std::endl;
|
|
}
|
|
|
|
int
|
|
main(int argc, char* argv[])
|
|
{
|
|
if (argc != 2) {
|
|
std::cerr << "Usage: pipeline filename" << std::endl;
|
|
exit(2);
|
|
}
|
|
char* filename = argv[1];
|
|
|
|
try {
|
|
run(filename);
|
|
} catch (std::exception& e) {
|
|
std::cout << e.what() << std::endl;
|
|
}
|
|
return 0;
|
|
}
|