A standard-library-compatible implementation of a stream that compresses or decompresses with zlib.
Compile with
g++ --std=c++11 zstream.cc -lz
Run with
./a.out < foo.txt > foo.gz
These stream buffers can be used with any type that supports operator>> and/or operator<<.
Example: Compress the first N fibonacci numbers and capture the result as a std::string.
std::ostringstream ostrstr{};
def_streambuf osb{ostrstr};
std::ostream os{&osb};
constexpr std::size_t N = 1 << 8;
long curr = 0, next = 1;
for (std::size_t i = 0; i < N; ++i)
{
os << curr;
curr = std::exchange(next, next+curr);
}
os << std::flush;
std::string result = ostrstr.str();