INIGetARGB.c

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#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "FBLib_ini.h"
#include "libFireBird.h"
 
bool INIGetARGB(char *Key, byte *Alpha, byte *Red, byte *Green, byte *Blue, dword DefaultValue)
{
  TRACEENTER();
 
  char                  *i = NULL, *j = NULL, *k;
  char                  TempKey[80];
  dword                 l, x;
  size_t                plen;
 
  if(!Key)
  {
    TRACEEXIT();
    return FALSE;
  }
 
  strncpy(TempKey, Key, sizeof(TempKey) - 2);
  TempKey[sizeof(TempKey) - 2] = '\0';
  strcat(TempKey, "=");
  l = strlen(TempKey);
 
  INIFindStartEnd(TempKey, &i, &j, l + 19);
 
  if(!i || !j || (j < i + l)) x = DefaultValue;
  else
  {
    k = strchr(i + l, ',');
 
    if(!k || (k > j))
    {
      // old style
      x = (dword) strtoul(i + l, NULL, 16);
 
    }
    else
    {
      // new style
      k = i + l;
      x = 0;
 
      // alpha
      if((k = ParseLine(k, &plen, ',')) && (plen > 0 && k + plen < j))
      {
        x |= (strtoul(k, NULL, (plen > 2 && tolower(*(k + 1)) == 'x' ? 16 : 10)) & 1) << 15;
        k += plen;
 
        // red
        if((k = ParseLine(k, &plen, ',')) && (plen > 0 && k + plen < j))
        {
          x |= (strtoul(k, NULL, (plen > 2 && tolower(*(k + 1)) == 'x' ? 16 : 10)) & 0x1f) << 10;
          k += plen;
 
          // green
          if((k = ParseLine(k, &plen, ',')) && (plen > 0 && k + plen < j))
          {
            x |= (strtoul(k, NULL, (plen > 2 && tolower(*(k + 1)) == 'x' ? 16 : 10)) & 0x1f) << 5;
            k += plen;
 
            // blue
            if(*k == ',') k++;
            x |= strtoul(k, NULL, (j - k > 2 && tolower(*(k + 1)) == 'x' ? 16 : 10)) & 0x1f;
          }
          else x = DefaultValue;
        }
        else x = DefaultValue;
      }
      else x = DefaultValue;
    }
  }
 
  if(Alpha) *Alpha = A1555(x);
  if(Red)   *Red   = R1555(x);
  if(Green) *Green = G1555(x);
  if(Blue)  *Blue  = B1555(x);
 
  TRACEEXIT();
  return TRUE;
}