bool
disk_super_block::IsValid() const
{
if (Magic1() != (int32)SUPER_BLOCK_MAGIC1
|| Magic2() != (int32)SUPER_BLOCK_MAGIC2
|| Magic3() != (int32)SUPER_BLOCK_MAGIC3
|| (int32)block_size != inode_size
|| ByteOrder() != SUPER_BLOCK_FS_LENDIAN
|| (1UL << BlockShift()) != BlockSize()
|| AllocationGroups() < 1
|| AllocationGroupShift() < 1
|| BlocksPerAllocationGroup() < 1
|| NumBlocks() < 10
|| AllocationGroups() != divide_roundup(NumBlocks(),
1L << AllocationGroupShift()))
return false;
return true;
}
// Convert HLS to RGB.
/* static */ COLORREF MyGraph::HLStoRGB(WORD wH, WORD wL, WORD wS)
{
_ASSERTE(0 <= wH && 240 >= wH && "Illegal hue value");
_ASSERTE(0 <= wL && 240 >= wL && "Illegal lum value");
_ASSERTE(0 <= wS && 240 >= wS && "Illegal sat value");
WORD wR(0);
WORD wG(0);
WORD wB(0);
// Achromatic case.
if (0 == wS) {
wR = wG = wB = (wL * RGBMAX) / HLSMAX;
if (UNDEFINED != wH) {
_ASSERTE(! "ERROR");
}
}
else {
// Chromatic case.
WORD Magic1(0);
WORD Magic2(0);
// Set up magic numbers.
if (wL <= HLSMAX / 2) {
Magic2 = (wL * (HLSMAX + wS) + (HLSMAX / 2)) / HLSMAX;
}
else {
Magic2 = wL + wS - ((wL * wS) + (HLSMAX / 2)) / HLSMAX;
}
Magic1 = 2 * wL - Magic2;
// Get RGB, change units from HLSMAX to RGBMAX.
wR = (HueToRGB(Magic1, Magic2, wH + (HLSMAX / 3)) * RGBMAX + (HLSMAX / 2)) / HLSMAX;
wG = (HueToRGB(Magic1, Magic2, wH) * RGBMAX + (HLSMAX / 2)) / HLSMAX;
wB = (HueToRGB(Magic1, Magic2, wH - (HLSMAX / 3)) * RGBMAX + (HLSMAX / 2)) / HLSMAX;
}
return RGB(wR,wG,wB);
}
