include/library/serialization.hpp

   1 #ifndef _library__serialization__hpp__included__
   2 #define _library__serialization__hpp__included__
   3
   4 #include <cstdlib>
   5 #include <map>
   6
   7 template<typename T1, typename T2, size_t ssize, bool be>
   8 void _write_common(unsigned char* target, T1 value)
   9 {
  10         for(size_t i = 0; i < ssize; i++)
  11                 if(be)
  12                         target[i] = static_cast<T2>(value) >> 8 * (ssize - i - 1);
  13                 else
  14                         target[i] = static_cast<T2>(value) >> 8 * i;
  15 }
  16
  17 template<typename T1, typename T2, size_t ssize, bool be>
  18 T1 _read_common(const unsigned char* source)
  19 {
  20         T2 value = 0;
  21         for(size_t i = 0; i < ssize; i++)
  22                 if(be)
  23                         value |= static_cast<T2>(source[i]) << 8 * (ssize - i - 1);
  24                 else
  25                         value |= static_cast<T2>(source[i]) << 8 * i;
  26         return static_cast<T1>(value);
  27 }
  28
  29 #define write8sbe(t, v)  _write_common<  int8_t,  uint8_t, 1,  true>(reinterpret_cast<unsigned char*>(t), (v))
  30 #define write8sle(t, v)  _write_common<  int8_t,  uint8_t, 1, false>(reinterpret_cast<unsigned char*>(t), (v))
  31 #define write8ube(t, v)  _write_common< uint8_t,  uint8_t, 1,  true>(reinterpret_cast<unsigned char*>(t), (v))
  32 #define write8ule(t, v)  _write_common< uint8_t,  uint8_t, 1, false>(reinterpret_cast<unsigned char*>(t), (v))
  33 #define write16sbe(t, v) _write_common< int16_t, uint16_t, 2,  true>(reinterpret_cast<unsigned char*>(t), (v))
  34 #define write16sle(t, v) _write_common< int16_t, uint16_t, 2, false>(reinterpret_cast<unsigned char*>(t), (v))
  35 #define write16ube(t, v) _write_common<uint16_t, uint16_t, 2,  true>(reinterpret_cast<unsigned char*>(t), (v))
  36 #define write16ule(t, v) _write_common<uint16_t, uint16_t, 2, false>(reinterpret_cast<unsigned char*>(t), (v))
  37 #define write32sbe(t, v) _write_common< int32_t, uint32_t, 4,  true>(reinterpret_cast<unsigned char*>(t), (v))
  38 #define write32sle(t, v) _write_common< int32_t, uint32_t, 4, false>(reinterpret_cast<unsigned char*>(t), (v))
  39 #define write32ube(t, v) _write_common<uint32_t, uint32_t, 4,  true>(reinterpret_cast<unsigned char*>(t), (v))
  40 #define write32ule(t, v) _write_common<uint32_t, uint32_t, 4, false>(reinterpret_cast<unsigned char*>(t), (v))
  41 #define write64sbe(t, v) _write_common< int64_t, uint64_t, 8,  true>(reinterpret_cast<unsigned char*>(t), (v))
  42 #define write64sle(t, v) _write_common< int64_t, uint64_t, 8, false>(reinterpret_cast<unsigned char*>(t), (v))
  43 #define write64ube(t, v) _write_common<uint64_t, uint64_t, 8,  true>(reinterpret_cast<unsigned char*>(t), (v))
  44 #define write64ule(t, v) _write_common<uint64_t, uint64_t, 8, false>(reinterpret_cast<unsigned char*>(t), (v))
  45 #define read8sbe(t)  _read_common<  int8_t,  uint8_t, 1,  true>(reinterpret_cast<const unsigned char*>(t))
  46 #define read8sle(t)  _read_common<  int8_t,  uint8_t, 1, false>(reinterpret_cast<const unsigned char*>(t))
  47 #define read8ube(t)  _read_common< uint8_t,  uint8_t, 1,  true>(reinterpret_cast<const unsigned char*>(t))
  48 #define read8ule(t)  _read_common< uint8_t,  uint8_t, 1, false>(reinterpret_cast<const unsigned char*>(t))
  49 #define read16sbe(t) _read_common< int16_t, uint16_t, 2,  true>(reinterpret_cast<const unsigned char*>(t))
  50 #define read16sle(t) _read_common< int16_t, uint16_t, 2, false>(reinterpret_cast<const unsigned char*>(t))
  51 #define read16ube(t) _read_common<uint16_t, uint16_t, 2,  true>(reinterpret_cast<const unsigned char*>(t))
  52 #define read16ule(t) _read_common<uint16_t, uint16_t, 2, false>(reinterpret_cast<const unsigned char*>(t))
  53 #define read32sbe(t) _read_common< int32_t, uint32_t, 4,  true>(reinterpret_cast<const unsigned char*>(t))
  54 #define read32sle(t) _read_common< int32_t, uint32_t, 4, false>(reinterpret_cast<const unsigned char*>(t))
  55 #define read32ube(t) _read_common<uint32_t, uint32_t, 4,  true>(reinterpret_cast<const unsigned char*>(t))
  56 #define read32ule(t) _read_common<uint32_t, uint32_t, 4, false>(reinterpret_cast<const unsigned char*>(t))
  57 #define read64sbe(t) _read_common< int64_t, uint64_t, 8,  true>(reinterpret_cast<const unsigned char*>(t))
  58 #define read64sle(t) _read_common< int64_t, uint64_t, 8, false>(reinterpret_cast<const unsigned char*>(t))
  59 #define read64ube(t) _read_common<uint64_t, uint64_t, 8,  true>(reinterpret_cast<const unsigned char*>(t))
  60 #define read64ule(t) _read_common<uint64_t, uint64_t, 8, false>(reinterpret_cast<const unsigned char*>(t))
  61
  62 template<typename T> void swap_endian(T& value)
  63 {
  64         char* _value = reinterpret_cast<char*>(&value);
  65         for(size_t i = 0; i < sizeof(T)/2; i++)
  66                 std::swap(_value[i], _value[sizeof(T)-i-1]);
  67 }
  68
  69 template<typename T> void swap_endian(T& value, int endian)
  70 {
  71         short _magic = 258;
  72         char magic = *reinterpret_cast<char*>(&_magic);
  73         bool do_swap = (endian == -1 && magic == 1) || (endian == 1 && magic == 2);
  74         if(do_swap)
  75                 swap_endian(value);
  76 }
  77
  78 template<typename T> T read_of_endian(const void* value, int endian)
  79 {
  80         T val;
  81         memcpy(&val, value, sizeof(T));
  82         swap_endian(val, endian);
  83         return val;
  84 }
  85
  86 template<typename T> void write_of_endian(void* value, const T& val, int endian)
  87 {
  88         T val2;
  89         memcpy(value, &val, sizeof(T));
  90         swap_endian(*reinterpret_cast<T*>(value), endian);
  91 }
  92
  93 #endif