empathicqubit/langtoncant
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simplify

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This commit is contained in:
Bjorn Einar Bjarntes 2021-12-18 17:44:30 +01:00
parent 55462f53e4
commit 14dab751ba
1 changed files with 4 additions and 4 deletions
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8
src/main.c
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@ -44,12 +44,12 @@ int isPositionWhite(long x, int y)
return 0; // 0 er false...
}
int power(int base, int exponent)
int power2(int exponent)
{
int result=1;
for (exponent; exponent>0; exponent--)
{
result = result * base;
result = result * 2;
}
return result;
}
@ -59,7 +59,7 @@ void setPositionWhite(unsigned short x, BYTE y)
{
unsigned short ra = (320 * (BYTE)(y/8)) + (y & 7);
unsigned short ba = 8 * (BYTE)(x/8);
unsigned short ma = power(2,(7-(x & 7)));
unsigned short ma = power2((7-(x & 7)));
unsigned short sa = 0x2000;
unsigned short ad = sa+ra+ba;
*(unsigned short*)(ad) = *(unsigned short*)(ad) | ma;
@ -69,7 +69,7 @@ void setPositionBlack(unsigned short x, BYTE y)
{
unsigned short ra = (320 * (BYTE)(y/8)) + (y & 7);
unsigned short ba = 8 * (BYTE)(x/8);
unsigned short ma = 255 - power(2,(7-(x & 7)));
unsigned short ma = 255 - power2((7-(x & 7)));
unsigned short sa = 0x2000;
unsigned short ad = sa+ra+ba;
*(unsigned short*)(ad) = *(unsigned short*)(ad) & ma;