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#ifndef UTIL_STREAM_BLOCK__
#define UTIL_STREAM_BLOCK__
#include <cstddef>
#include <stdint.h>
namespace util {
namespace stream {
class Block {
public:
Block() : mem_(NULL), valid_size_(0) {}
Block(void *mem, std::size_t size) : mem_(mem), valid_size_(size) {}
void SetValidSize(std::size_t to) { valid_size_ = to; }
// Read might fill in less than Allocated at EOF.
std::size_t ValidSize() const { return valid_size_; }
void *Get() { return mem_; }
const void *Get() const { return mem_; }
const void *ValidEnd() const {
return reinterpret_cast<const uint8_t*>(mem_) + valid_size_;
}
operator bool() const { return mem_ != NULL; }
bool operator!() const { return mem_ == NULL; }
private:
friend class Link;
void SetToPoison() {
mem_ = NULL;
}
void *mem_;
std::size_t valid_size_;
};
} // namespace stream
} // namespace util
#endif // UTIL_STREAM_BLOCK__
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