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// Like cat but interprets compressed files.
#include "util/file.hh"
#include "util/read_compressed.hh"
#include <string.h>
#include <iostream>
namespace {
const std::size_t kBufSize = 16384;
void Copy(util::ReadCompressed &from, int to) {
util::scoped_malloc buffer(util::MallocOrThrow(kBufSize));
while (std::size_t amount = from.Read(buffer.get(), kBufSize)) {
util::WriteOrThrow(to, buffer.get(), amount);
}
}
} // namespace
int main(int argc, char *argv[]) {
// Lane Schwartz likes -h and --help
for (int i = 1; i < argc; ++i) {
char *arg = argv[i];
if (!strcmp(arg, "--")) break;
if (!strcmp(arg, "-h") || !strcmp(arg, "--help")) {
std::cerr <<
"A cat implementation that interprets compressed files.\n"
"Usage: " << argv[0] << " [file1] [file2] ...\n"
"If no file is provided, then stdin is read.\n";
return 1;
}
}
try {
if (argc == 1) {
util::ReadCompressed in(0);
Copy(in, 1);
} else {
for (int i = 1; i < argc; ++i) {
util::ReadCompressed in(util::OpenReadOrThrow(argv[i]));
Copy(in, 1);
}
}
} catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
return 2;
}
return 0;
}
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