DanilaFe/Abacus
1
0
Fork 0
mirror of https://github.com/DanilaFe/abacus synced 2026-01-10 17:25:19 +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 3cf4f958b0
commit 989ac80bf4
1 changed files with 15 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

94
src/org/nwapw/abacus/number/FunctionDatabase.java
View File

@@ -1,94 +0,0 @@
package org.nwapw.abacus.number;
import java.util.HashMap;
public class FunctionDatabase {
private HashMap<String, Function> functions;
private void registerDefault(){
functions.put("+", 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;
}
});
functions.put("-", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length == 2;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
return params[0].subtract(params[1]);
}
});
functions.put("*", 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;
}
});
functions.put("/", new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length == 2;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
return params[0].divide(params[1]);
}
});
functions.put("!", 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;
}
});
}
public FunctionDatabase(){
functions = new HashMap<>();
registerDefault();
}
public Function getFunction(String name){
return functions.get(name);
}
}