mirror of
https://github.com/qpdf/qpdf.git
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96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
#include <qpdf/Pl_Flate.hh>
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#include <qpdf/Pl_StdioFile.hh>
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#include <qpdf/QPDF.hh>
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#include <qpdf/QUtil.hh>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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static char const* whoami = nullptr;
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void
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usage()
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{
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std::cerr << "Usage: " << whoami << " { -uncompress | -compress[=n] }" << std::endl
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<< "If n is specified with -compress, it is a zlib compression level from"
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<< std::endl
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<< "1 to 9 where lower numbers are faster and less compressed and higher" << std::endl
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<< "numbers are slower and more compressed" << std::endl;
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exit(2);
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}
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int
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main(int argc, char* argv[])
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{
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if ((whoami = strrchr(argv[0], '/')) == nullptr) {
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whoami = argv[0];
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} else {
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++whoami;
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}
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if ((argc == 2) && (strcmp(argv[1], "--version") == 0)) {
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std::cout << whoami << " from qpdf version " << QPDF::QPDFVersion() << std::endl;
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exit(0);
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}
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if (argc != 2) {
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usage();
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}
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Pl_Flate::action_e action = Pl_Flate::a_inflate;
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if ((strcmp(argv[1], "-uncompress") == 0)) {
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// okay
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} else if ((strcmp(argv[1], "-compress") == 0)) {
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action = Pl_Flate::a_deflate;
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} else if ((strncmp(argv[1], "-compress=", 10) == 0)) {
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action = Pl_Flate::a_deflate;
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int level = QUtil::string_to_int(argv[1] + 10);
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Pl_Flate::setCompressionLevel(level);
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} else if (strcmp(argv[1], "--_zopfli") == 0) {
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// Undocumented option, but that doesn't mean someone doesn't use it...
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// This is primarily here to support the test suite.
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std::cout << (Pl_Flate::zopfli_supported() ? "1" : "0")
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<< (Pl_Flate::zopfli_enabled() ? "1" : "0") << std::endl;
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return 0;
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} else {
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usage();
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}
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bool warn = false;
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try {
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QUtil::binary_stdout();
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QUtil::binary_stdin();
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Pl_Flate::zopfli_check_env();
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auto out = std::make_shared<Pl_StdioFile>("stdout", stdout);
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auto flate = std::make_shared<Pl_Flate>("flate", out.get(), action);
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flate->setWarnCallback([&warn](char const* msg, int code) {
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warn = true;
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std::cerr << whoami << ": WARNING: zlib code " << code << ", msg = " << msg
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<< std::endl;
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});
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unsigned char buf[10000];
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bool done = false;
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while (!done) {
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size_t len = fread(buf, 1, sizeof(buf), stdin);
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if (len <= 0) {
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done = true;
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} else {
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flate->write(buf, len);
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}
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}
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flate->finish();
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} catch (std::exception& e) {
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std::cerr << whoami << ": " << e.what() << std::endl;
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exit(2);
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}
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if (warn) {
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exit(3);
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}
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return 0;
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}
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