mirror of https://github.com/qpdf/qpdf.git
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
#include <qpdf/assert_test.h>
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#include <qpdf/Pl_Base64.hh>
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#include <qpdf/Pl_StdioFile.hh>
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#include <qpdf/QUtil.hh>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include <stdexcept>
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static bool
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write_some(FILE* f, size_t bytes, Pipeline* p)
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{
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unsigned char buf[1000];
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assert(bytes <= sizeof(buf));
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size_t len = fread(buf, 1, bytes, f);
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if (len > 0) {
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p->write(buf, len);
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}
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if (len < bytes) {
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if (ferror(f)) {
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std::cerr << "error reading file" << std::endl;
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exit(2);
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}
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p->finish();
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return false;
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}
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return (len == bytes);
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}
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static void
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usage()
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{
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std::cerr << "Usage: base64 encode|decode" << 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 (argc != 2) {
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usage();
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}
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QUtil::binary_stdout();
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QUtil::binary_stdin();
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Pl_Base64::action_e action = Pl_Base64::a_decode;
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if (strcmp(argv[1], "encode") == 0) {
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action = Pl_Base64::a_encode;
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} else if (strcmp(argv[1], "decode") != 0) {
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usage();
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}
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try {
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Pl_StdioFile out("stdout", stdout);
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Pl_Base64 decode("decode", &out, action);
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// The comments are "n: n%4 n%3", where n is the number of
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// bytes read at the end of the call, and are there to
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// indicate that we are reading in chunks that exercise
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// various boundary conditions around subsequent writes and
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// the state of buf and pos. There are some writes that don't
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// do flush at all, some that call flush multiple times, and
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// some that start in the middle and do flush, and this is
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// true for both encode and decode.
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if (write_some(stdin, 1, &decode) && // 1: 1 1
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write_some(stdin, 4, &decode) && // 5: 1 2
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write_some(stdin, 2, &decode) && // 7: 3 1
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write_some(stdin, 2, &decode) && // 9: 1 0
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write_some(stdin, 7, &decode) && // 16: 0 1
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write_some(stdin, 1, &decode) && // 17: 1 2
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write_some(stdin, 9, &decode) && // 26: 2 2
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write_some(stdin, 2, &decode)) { // 28: 0 1
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while (write_some(stdin, 1000, &decode)) {
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}
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}
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} catch (std::exception& e) {
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std::cout << "exception: " << e.what() << std::endl;
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exit(2);
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}
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return 0;
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}
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