src/emulation/sky/gauge.cpp

   1 #include "gauge.hpp"
   2 #include "util.hpp"
   3 #include "library/string.hpp"
   4
   5 namespace sky
   6 {
   7         gauge::gauge()
   8         {
   9                 dummyimage[0] = dummyimage[1] = 0;
  10         }
  11
  12         gauge::gauge(const std::vector<char>& dispdat, size_t cells)
  13         {
  14                 dummyimage[0] = dummyimage[1] = 0;
  15                 if(dispdat.size() < 2 * cells)
  16                         (stringfmt() << "Entry pointer table incomplete").throwex();
  17                 data.resize(dispdat.size() - 2 * cells);
  18                 memcpy(&data[0], &dispdat[2 * cells], data.size());
  19                 for(unsigned i = 0; i < cells; i++)
  20                         unpack_image(dispdat, i, cells);
  21         }
  22
  23         void gauge::unpack_image(const std::vector<char>& dispdat, size_t i, size_t total)
  24         {
  25                 size_t offset = combine(dispdat[2 * i + 0], dispdat[2 * i + 1]);
  26                 //Check that the offset is in-range.
  27                 if(data.size() < offset)
  28                         (stringfmt() << "Entry " << i << " points outside file").throwex();
  29                 if(data.size() < offset + 4)
  30                         (stringfmt() << "Entry " << i << " header incomplete").throwex();
  31                 size_t imagesize = (uint16_t)data[offset + 2] * data[offset + 3];
  32                 if(data.size() < offset + 4 + imagesize)
  33                         (stringfmt() << "Entry " << i << " bitmap incomplete").throwex();
  34                 ptr.push_back(offset);
  35         }
  36 }