com.oracle.truffle.regex.tregex.string.StringLATIN1 Maven / Gradle / Ivy

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/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
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 * The above copyright notice and either this complete permission notice or at a
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package com.oracle.truffle.regex.tregex.string;

import java.util.Arrays;

import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;

public final class StringLATIN1 implements AbstractString {

    @CompilationFinal(dimensions = 1) private final byte[] str;

    public StringLATIN1(byte[] str) {
        this.str = str;
    }

    @Override
    public int encodedLength() {
        return str.length;
    }

    @Override
    public Object content() {
        return str;
    }

    @Override
    public String toString() {
        return defaultToString();
    }

    @Override
    public StringLATIN1 substring(int start, int end) {
        return new StringLATIN1(Arrays.copyOfRange(str, start, end));
    }

    @Override
    public boolean regionMatches(int offset, AbstractString other, int ooffset, int encodedLength) {
        byte[] o = ((StringLATIN1) other).str;
        if (offset + encodedLength > str.length || ooffset + encodedLength > o.length) {
            return false;
        }
        for (int i = 0; i < encodedLength; i++) {
            if (str[offset + i] != o[ooffset + i]) {
                return false;
            }
        }
        return true;
    }

    @Override
    public AbstractStringIterator iterator() {
        return new StringLATIN1Iterator(str);
    }

    private static final class StringLATIN1Iterator extends AbstractStringIterator {

        private final byte[] str;

        private StringLATIN1Iterator(byte[] str) {
            this.str = str;
        }

        @Override
        public boolean hasNext() {
            return i < str.length;
        }

        @Override
        public int nextInt() {
            return Byte.toUnsignedInt(str[i++]);
        }
    }
}