84 lines
1.9 KiB
Java
84 lines
1.9 KiB
Java
import java.util.Collections;
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import java.util.Vector;
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import java.util.stream.Collectors;
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public class VariableType {
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/**
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* The base type of this variable which remove all ending stars. Each item is a
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* part of namespace string. If no namespace, this Vector will only have one
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* item.
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*/
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private Vector<String> mBaseType;
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/**
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* The pointer level of this type. It is equal with the count of stars.
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*/
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private int mPointerLevel;
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public VariableType() {
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mBaseType = new Vector<String>();
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mPointerLevel = 0;
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}
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private VariableType(Vector<String> base_type, int pointer_level) {
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mBaseType = (Vector<String>) base_type.clone();
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mPointerLevel = pointer_level;
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}
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public void fromCType(String ctype) {
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if (ctype.isEmpty())
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throw new IllegalArgumentException("empty string can not be parsed.");
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// get pointer part and name part
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int len = ctype.length();
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int star_pos = ctype.indexOf('*');
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String namepart;
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if (star_pos == -1) {
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// no star
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namepart = ctype;
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mPointerLevel = 0;
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} else {
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// has star
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if (star_pos == 0)
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throw new IllegalArgumentException("base type not found.");
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namepart = ctype.substring(0, star_pos);
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mPointerLevel = len - star_pos;
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}
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// resolve name part
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mBaseType.clear();
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for (String item : namepart.split("::")) {
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mBaseType.add(item);
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}
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}
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public String toCType() {
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return mBaseType.stream().collect(Collectors.joining("::"))
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+ String.join("", Collections.nCopies(mPointerLevel, "*"));
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}
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public String getBaseType() {
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return mBaseType.lastElement();
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}
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public boolean isPointer() {
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return mPointerLevel != 0;
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}
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public int getPointerLevel() {
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return mPointerLevel;
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}
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public Vector<String> getBaseTypeHierarchy() {
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return (Vector<String>) mBaseType.clone();
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}
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public boolean isValid() {
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return mBaseType.size() != 0;
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}
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public VariableType getPointerOfThis() {
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return new VariableType(mBaseType, mPointerLevel + 1);
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}
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}
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