Source/WinDefs.cpp

   1 /**> HEADER FILES <**/
   2 #include "WinDefs.h"
   3 #include <windows.h>
   4 #include <errno.h>
   5 #include <time.h>
   6 #include <stdio.h>
   7
   8
   9 class AppTime
  10 {
  11 public:
  12         AppTime()
  13         {
  14                 counterRate = 1;
  15                 baseCounter = 0;
  16                 QueryPerformanceFrequency( (LARGE_INTEGER*)&counterRate);
  17                 QueryPerformanceCounter( (LARGE_INTEGER*)&baseCounter);
  18         }
  19         __int64 counterRate;            // LARGE_INTEGER type has no math functions so use int64
  20         __int64 baseCounter;
  21 };
  22 static AppTime g_appTime;
  23
  24
  25
  26 void CopyCStringToPascal( const char* src, unsigned char dst[256])
  27 {
  28         int len = strlen( src);
  29         dst[ 0] = len;
  30         memcpy( dst + 1, src, len);
  31 }
  32
  33
  34 void CopyPascalStringToC( const unsigned char* src, char* dst)
  35 {
  36         int len = src[ 0];
  37         memcpy( dst, src + 1, len);
  38         dst[ len] = 0;
  39 }
  40
  41
  42 AbsoluteTime UpTime()
  43 {
  44         __int64 counter;
  45         QueryPerformanceCounter( (LARGE_INTEGER*)&counter);
  46
  47         counter -= g_appTime.baseCounter;
  48
  49         AbsoluteTime time;
  50         time.lo = (unsigned long)counter;
  51         time.hi = (unsigned long)(counter >> 32);
  52         return time;
  53 }
  54
  55
  56 Duration AbsoluteDeltaToDuration( AbsoluteTime& a, AbsoluteTime& b)
  57 {
  58         __int64 value = a.hi;
  59         value <<= 32;
  60         value |= a.lo;
  61         __int64 value2 = b.hi;
  62         value2 <<= 32;
  63         value2 |= b.lo;
  64         value -= value2;
  65
  66         if (value <= 0)
  67                 return durationImmediate;
  68
  69         __int64 frac = value % g_appTime.counterRate;
  70         value /= g_appTime.counterRate;
  71
  72         Duration time;
  73
  74         if (value == 0)
  75         {
  76                 frac *= -1000000;
  77                 frac /= g_appTime.counterRate;
  78                 time = (Duration)frac;
  79         }
  80         else
  81         {
  82                 frac *= 1000;
  83                 frac /= g_appTime.counterRate;
  84                 value *= 1000;
  85                 value += frac;
  86                 time = (Duration)value;
  87         }
  88
  89         return time;
  90 }
  91
  92
  93 static char g_filename[ 256];
  94 char* ConvertFileName( const char* orgfilename)
  95 {
  96         // translate filename into proper path name
  97         if (orgfilename[ 0] == ':')
  98                 orgfilename++;
  99         strcpy( g_filename, orgfilename);
 100
 101         for (int n = 0; g_filename[ n]; n++)
 102         {
 103                 if (g_filename[ n] == ':')
 104                         g_filename[ n] = '/';
 105         }
 106
 107         return g_filename;
 108 }