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DREAMWEB: Ported 'findfirstpath' to C++.

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This conversion could do with a bit more work to remove the es/ax/cx
temp usage and clean up the code.
This commit is contained in:
D G Turner 2011-12-25 23:33:11 +00:00
parent 1f346baa92
commit c7b1ec2198
5 changed files with 29 additions and 46 deletions
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29
engines/dreamweb/object.cpp
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@ -341,6 +341,32 @@ void DreamGenContext::openOb() {
_openChangeSize = getOpenedSlotCount() * kItempicsize + kInventx;
}
uint8 DreamGenContext::findFirstPath(uint16 param) {
es = data.word(kReels);
uint16 ptr = 144 * data.byte(kRoomnum);
// TODO: Replace ax, cx usage with temporary uint8/16 variables...
cx = param;
for (uint8 pathLoop = 0; pathLoop < 12; pathLoop++, ptr += 8) {
ax = es.word(ptr+2);
if (ax == 0x0ffff)
continue; // "nofirst"
if (cl < al || ch < ah)
continue; // "nofirst"
ax = es.word(ptr+4);
if (cl > al || ch > ah)
continue; // "nofirst"
return es.byte(ptr+6); // "gotfirst"
}
return 0;
}
void DreamGenContext::identifyOb() {
if (data.word(kWatchingtime) != 0) {
blank();
@ -362,8 +388,7 @@ void DreamGenContext::identifyOb() {
data.byte(kPointerspath) = dl;
ax = pop();
push(ax);
findFirstPath();
data.byte(kPointerfirstpath) = al;
data.byte(kPointerfirstpath) = findFirstPath(ax);
ax = pop();
byte x = al;