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added data_streamer methods

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This commit is contained in:
Bob Polis 2020-02-18 23:07:40 +01:00
parent e17e68f64c
commit 2ab53159ce
1 changed files with 105 additions and 1 deletions
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106
libscio.hpp
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@ -12,12 +12,13 @@
#include <iostream>
#include <streambuf>
#include <cstdio>
#include <cstdint>
namespace sc {
namespace io {
class fdoutbuf: public std::streambuf {
class fdoutbuf : public std::streambuf {
public:
fdoutbuf(int fd): _fd(fd) {}
@ -44,6 +45,109 @@ namespace sc {
};
class fdstream : public fdostream, public fdistream {
};
class socketstream : public fdstream {
};
class meminbuf : public std::streambuf {
};
class memistream : public std::istream {
};
class memoutbuf : public std::streambuf {
};
class memostream : public std::ostream {
};
class memstream : public memostream, public memistream {
};
enum class byte_order {
undefined,
little_endian,
big_endian
};
class data_streamer {
public:
static byte_order cur_byte_order();
static inline void byte_swap(void* val, size_t n) {
char* p = reinterpret_cast<char*>(val);
for (size_t i = 0; i < n / 2; ++i) {
std::swap(p[i], p[n - 1 - i]);
}
}
data_streamer() = default;
byte_order target_byte_order() const { return _target_byte_order; }
void target_byte_order(byte_order new_byte_order) { _target_byte_order = new_byte_order; }
std::string get4chars(std::istream& file) const;
uint8_t getui8(std::istream& file) const;
int8_t getsi8(std::istream& file) const;
uin16_t getui16(std::istream& file) const;
int16_t getsi16(std::istream& file) const;
uint32_t getui24(std::istream& file) const;
int32_t getsi24(std::istream& file) const;
uint32_t getui32(std::istream& file) const;
int32_t getsi32(std::istream& file) const;
uint64_t getui64(std::istream& file) const;
int64_t getsi64(std::istream& file) const;
float getf32(std::istream& file) const;
double getf64(std::istream& file) const;
double getf80(std::istream& file) const;
void put4chars(const std::string& s, ostream& file) const;
void putui8(uint8_t val, std::ostream& file) const;
void putsi8(int8_t val, std::ostream& file) const;
void putui16(uint16_t val, std::ostream& file) const;
void putsi16(int16_t val, std::ostream& file) const;
void putui24(uint32_t val, std::ostream& file) const;
void putsi24(int32_t val, std::ostream& file) const;
void putui32(uint32_t val, std::ostream& file) const;
void putsi32(int32_t val, std::ostream& file) const;
void putui64(uint64_t val, std::ostream& file) const;
void putsi64(int64_t val, std::ostream& file) const;
void putf32(float val, std::ostream& file) const;
void putf64(double val, std::ostream& file) const;
void putf80(double val, std::ostream& file) const;
private:
byte_order _target_byte_order {cur_byte_order()};
};
class byte_order_changer {
public:
byte_order_changer(const data_streamer* ds, byte_order order);
~byte_order_changer();
byte_order_changer(byte_order_changer&& other);
byte_order_changer& operator=(byte_order_changer&& other);
byte_order_changer(const byte_order_changer&) = delete;
byte_order_changer& operator=(const byte_order_changer&) = delete;
private:
data_streamer* _data_streamer {nullptr};
byte_order _saved_byte_order {byte_order::undefined};
};
}
}