mdw@git.distorted.org.uk Git - clg/blob - gffi/alien/memory.c

   1 #include <stdint.h>
   2
   3 uint16_t gffi_get_uint_16_swapped (uint8_t* location, int offset)
   4 {
   5   uint8_t buf[2];
   6   buf[1] = location[offset];
   7   buf[0] = location[offset + 1];
   8   return *(uint16_t*)buf;
   9 }
  10
  11 void gffi_set_uint_16_swapped (uint8_t* location, int offset, uint16_t value)
  12 {
  13   uint8_t *buf = (uint8_t*)&value;
  14
  15   location[offset + 0] = buf[1];
  16   location[offset + 1] = buf[0];
  17 }
  18
  19 uint32_t gffi_get_uint_32_swapped (uint8_t* location, int offset)
  20 {
  21   uint8_t buf[4];
  22   buf[3] = location[offset];
  23   buf[2] = location[offset + 1];
  24   buf[1] = location[offset + 2];
  25   buf[0] = location[offset + 3];
  26   return *(uint32_t*)buf;
  27 }
  28
  29 void gffi_set_uint_32_swapped (uint8_t* location, int offset, uint32_t value)
  30 {
  31   uint8_t *buf = (uint8_t*)&value;
  32
  33   location[offset + 0] = buf[3];
  34   location[offset + 1] = buf[2];
  35   location[offset + 2] = buf[1];
  36   location[offset + 3] = buf[0];
  37 }
  38
  39 uint64_t gffi_get_uint_64_swapped (uint8_t* location, int offset)
  40 {
  41   uint8_t buf[8];
  42   buf[7] = location[offset];
  43   buf[6] = location[offset + 1];
  44   buf[5] = location[offset + 2];
  45   buf[4] = location[offset + 3];
  46   buf[3] = location[offset + 4];
  47   buf[2] = location[offset + 5];
  48   buf[1] = location[offset + 6];
  49   buf[0] = location[offset + 7];
  50   return *(uint64_t*)buf;
  51 }
  52
  53 void gffi_set_uint_64_swapped (uint8_t* location, int offset, uint64_t value)
  54 {
  55   uint8_t *buf = (uint8_t*)&value;
  56
  57   location[offset + 0] = buf[7];
  58   location[offset + 1] = buf[6];
  59   location[offset + 2] = buf[5];
  60   location[offset + 3] = buf[4];
  61   location[offset + 4] = buf[3];
  62   location[offset + 5] = buf[2];
  63   location[offset + 6] = buf[1];
  64   location[offset + 7] = buf[0];
  65 }
  66
  67 int16_t gffi_get_int_16_swapped (int8_t* location, int offset)
  68 {
  69   int8_t buf[2];
  70   buf[1] = location[offset];
  71   buf[0] = location[offset + 1];
  72   return *(int16_t*)buf;
  73 }
  74
  75 void gffi_set_int_16_swapped (uint8_t* location, int offset, int16_t value)
  76 {
  77   uint8_t *buf = (uint8_t*)&value;
  78
  79   location[offset + 0] = buf[1];
  80   location[offset + 1] = buf[0];
  81 }
  82
  83 int32_t gffi_get_int_32_swapped (int8_t* location, int offset)
  84 {
  85   int8_t buf[4];
  86   buf[3] = location[offset];
  87   buf[2] = location[offset + 1];
  88   buf[1] = location[offset + 2];
  89   buf[0] = location[offset + 3];
  90   return *(int32_t*)buf;
  91 }
  92
  93 void gffi_set_int_32_swapped (uint8_t* location, int offset, int32_t value)
  94 {
  95   uint8_t *buf = (uint8_t*)&value;
  96
  97   location[offset + 0] = buf[3];
  98   location[offset + 1] = buf[2];
  99   location[offset + 2] = buf[1];
 100   location[offset + 3] = buf[0];
 101 }
 102
 103 int64_t gffi_get_int_64_swapped (int8_t* location, int offset)
 104 {
 105   int8_t buf[8];
 106   buf[7] = location[offset];
 107   buf[6] = location[offset + 1];
 108   buf[5] = location[offset + 2];
 109   buf[4] = location[offset + 3];
 110   buf[3] = location[offset + 4];
 111   buf[2] = location[offset + 5];
 112   buf[1] = location[offset + 6];
 113   buf[0] = location[offset + 7];
 114   return *(int64_t*)buf;
 115 }
 116
 117 void gffi_set_int_64_swapped (uint8_t* location, int offset, int64_t value)
 118 {
 119   uint8_t *buf = (uint8_t*)&value;
 120
 121   location[offset + 0] = buf[7];
 122   location[offset + 1] = buf[6];
 123   location[offset + 2] = buf[5];
 124   location[offset + 3] = buf[4];
 125   location[offset + 4] = buf[3];
 126   location[offset + 5] = buf[2];
 127   location[offset + 6] = buf[1];
 128   location[offset + 7] = buf[0];
 129 }
 130
 131 float gffi_get_single_float_swapped (int8_t* location, int offset)
 132 {
 133   int8_t buf[4];
 134   buf[3] = location[offset];
 135   buf[2] = location[offset + 1];
 136   buf[1] = location[offset + 2];
 137   buf[0] = location[offset + 3];
 138   return *(float*)buf;
 139 }
 140
 141 void gffi_set_single_float_swapped (uint8_t* location, int offset, float value)
 142 {
 143   uint8_t *buf = (uint8_t*)&value;
 144
 145   location[offset + 0] = buf[3];
 146   location[offset + 1] = buf[2];
 147   location[offset + 2] = buf[1];
 148   location[offset + 3] = buf[0];
 149 }
 150
 151 double gffi_get_double_float_swapped (int8_t* location, int offset)
 152 {
 153   int8_t buf[8];
 154   buf[7] = location[offset];
 155   buf[6] = location[offset + 1];
 156   buf[5] = location[offset + 2];
 157   buf[4] = location[offset + 3];
 158   buf[3] = location[offset + 4];
 159   buf[2] = location[offset + 5];
 160   buf[1] = location[offset + 6];
 161   buf[0] = location[offset + 7];
 162   return *(double*)buf;
 163 }
 164
 165 void gffi_set_double_float_swapped (uint8_t* location, int offset, double value)
 166 {
 167   uint8_t *buf = (uint8_t*)&value;
 168
 169   location[offset + 0] = buf[7];
 170   location[offset + 1] = buf[6];
 171   location[offset + 2] = buf[5];
 172   location[offset + 3] = buf[4];
 173   location[offset + 4] = buf[3];
 174   location[offset + 5] = buf[2];
 175   location[offset + 6] = buf[1];
 176   location[offset + 7] = buf[0];
 177 }