DanilaFe/Abacus
1
0
Fork 0
mirror of https://github.com/DanilaFe/abacus synced 2026-01-11 01:35:18 +00:00
Code Issues Releases Wiki Activity

Move the standard functions into a standard plugin.

Browse Source
This commit is contained in:
Danila Fedorin
2017-07-25 21:50:41 -07:00
parent b3c795e42f
commit 0b5c72d274
1 changed files with 15 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
src/org/nwapw/abacus/plugin/StandardPlugin.java Normal file
View File

@@ -0,0 +1,90 @@
package org.nwapw.abacus.plugin;
import org.nwapw.abacus.number.Function;
import org.nwapw.abacus.number.NaiveNumber;
import org.nwapw.abacus.number.NumberInterface;
public class StandardPlugin extends Plugin {
public StandardPlugin(PluginManager manager) {
super(manager);
}
@Override
public void load() {
registerFunction("+", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length >= 1;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
NumberInterface sum = params[0];
for(int i = 1; i < params.length; i++){
sum = sum.add(params[i]);
}
return sum;
}
});
registerFunction("-", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length == 2;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
return params[0].subtract(params[1]);
}
});
registerFunction("*", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length >= 1;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
NumberInterface product = params[0];
for(int i = 1; i < params.length; i++){
product = product.multiply(params[i]);
}
return product;
}
});
registerFunction("/", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length == 2;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
return params[0].divide(params[1]);
}
});
registerFunction("!", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length == 1;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
NumberInterface factorial = params[0];
NumberInterface multiplier = params[0];
//It is necessary to later prevent calls of factorial on anything but non-negative integers.
while((multiplier = multiplier.subtract(NaiveNumber.ONE.promoteTo(multiplier.getClass()))).signum() == 1){
factorial = factorial.multiply(multiplier);
}
return factorial;
}
});
}
}