Method read

gpcontrib/gpcloud/test/decompress_reader_test.cpp:23–37

    }

    uint64_t read(char *buf, uint64_t count) {
        uint64_t remaining = this->data.size() - offset;
        if (remaining <= 0) {
            return 0;
        }

        uint64_t size = (remaining > count) ? count : remaining;
        size = size < this->chunkSize ? size : this->chunkSize;
        for (uint64_t i = 0; i < size; i++) {
            buf[i] = this->data[offset + i];
        }

        this->offset += size;
        return size;
    }

    void clear() {
        this->data.clear();