59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
#ifndef MARISA_WRITER_H_
|
|
#define MARISA_WRITER_H_
|
|
|
|
#include <cstdio>
|
|
#include <iostream>
|
|
|
|
#include "base.h"
|
|
|
|
namespace marisa {
|
|
|
|
class Writer {
|
|
public:
|
|
Writer();
|
|
explicit Writer(std::FILE *file);
|
|
explicit Writer(int fd);
|
|
explicit Writer(std::ostream *stream);
|
|
~Writer();
|
|
|
|
void open(const char *filename, bool trunc_flag = true,
|
|
long offset = 0, int whence = SEEK_SET);
|
|
|
|
template <typename T>
|
|
void write(const T &obj) {
|
|
write_data(&obj, sizeof(T));
|
|
}
|
|
|
|
template <typename T>
|
|
void write(const T *objs, std::size_t num_objs) {
|
|
MARISA_THROW_IF((objs == NULL) && (num_objs != 0), MARISA_PARAM_ERROR);
|
|
MARISA_THROW_IF(num_objs > (MARISA_UINT32_MAX / sizeof(T)),
|
|
MARISA_SIZE_ERROR);
|
|
if (num_objs != 0) {
|
|
write_data(objs, sizeof(T) * num_objs);
|
|
}
|
|
}
|
|
|
|
bool is_open() const {
|
|
return (file_ != NULL) || (fd_ != -1) || (stream_ != NULL);
|
|
}
|
|
|
|
void clear();
|
|
void swap(Writer *rhs);
|
|
|
|
private:
|
|
std::FILE *file_;
|
|
int fd_;
|
|
std::ostream *stream_;
|
|
bool needs_fclose_;
|
|
|
|
void write_data(const void *data, std::size_t size);
|
|
|
|
// Disallows copy and assignment.
|
|
Writer(const Writer &);
|
|
Writer &operator=(const Writer &);
|
|
};
|
|
|
|
} // namespace marisa
|
|
|
|
#endif // MARISA_WRITER_H_
|