74 lines
1.3 KiB
Java
74 lines
1.3 KiB
Java
package net.filebot.util;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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public enum BOM {
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UTF_8((byte) 0xEF, (byte) 0xBB, (byte) 0xBF),
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UTF_16BE((byte) 0xFE, (byte) 0xFF),
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UTF_16LE((byte) 0xFF, (byte) 0xFE),
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UTF_32BE((byte) 0x00, (byte) 0x00, (byte) 0xFE, (byte) 0xFF),
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UTF_32LE((byte) 0xFF, (byte) 0xFE, (byte) 0x00, (byte) 0x00),
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GB_18030((byte) 0x84, (byte) 0x31, (byte) 0x95, (byte) 0x33);
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public static final int SIZE = 4;
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private byte[] bom;
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BOM(byte... bom) {
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this.bom = bom;
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}
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public int size() {
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return bom.length;
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}
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public boolean matches(byte[] bytes) {
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if (bytes.length < bom.length) {
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return false;
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}
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for (int i = 0; i < bom.length; i++) {
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if (bom[i] != bytes[i]) {
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return false;
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}
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}
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return true;
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}
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public Charset getCharset() {
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switch (this) {
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case UTF_8:
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return StandardCharsets.UTF_8;
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case UTF_16BE:
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return StandardCharsets.UTF_16BE;
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case UTF_16LE:
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return StandardCharsets.UTF_16LE;
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case UTF_32BE:
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return Charset.forName("UTF-32BE");
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case UTF_32LE:
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return Charset.forName("UTF-32LE");
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case GB_18030:
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return Charset.forName("GB18030");
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}
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return null;
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}
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public static BOM detect(byte[] bytes) {
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for (BOM bom : values()) {
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if (bom.matches(bytes)) {
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return bom;
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}
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}
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return null;
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}
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}
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