Method open

samples/zlib/iostream2/zstream.h:65–68

Opens a gzip (.gz) file for reading. * open() can be used to read a file which is not in gzip format; * in this case read() will directly read from the file without * decompression. errno can be checked to distinguish two error * cases (if errno is zero, the zlib error is Z_MEM_ERROR). */

         * cases (if errno is zero, the zlib error is Z_MEM_ERROR).
         */
        void open(const char* name) {
            if (m_fp) close();
            m_fp = ::gzopen(name, "rb");
        }

        void open(FILE* fp) {
            SET_BINARY_MODE(fp);