82 lines
2.3 KiB
Java
82 lines
2.3 KiB
Java
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package org.bouncycastle.asn1;
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import java.io.ByteArrayInputStream;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.channels.FileChannel;
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/* loaded from: classes6.dex */
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class StreamUtil {
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private static final long MAX_MEMORY = Runtime.getRuntime().maxMemory();
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/* JADX INFO: Access modifiers changed from: package-private */
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public static int calculateBodyLength(int i) {
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int i2 = 1;
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if (i > 127) {
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int i3 = 1;
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while (true) {
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i >>>= 8;
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if (i == 0) {
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break;
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}
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i3++;
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}
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for (int i4 = (i3 - 1) << 3; i4 >= 0; i4 -= 8) {
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i2++;
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}
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}
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return i2;
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static int findLimit(InputStream inputStream) {
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if (inputStream instanceof LimitedInputStream) {
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return ((LimitedInputStream) inputStream).getRemaining();
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}
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if (inputStream instanceof ASN1InputStream) {
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return ((ASN1InputStream) inputStream).getLimit();
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}
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if (inputStream instanceof ByteArrayInputStream) {
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return ((ByteArrayInputStream) inputStream).available();
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}
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if (inputStream instanceof FileInputStream) {
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try {
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FileChannel channel = ((FileInputStream) inputStream).getChannel();
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long size = channel != null ? channel.size() : 2147483647L;
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if (size < 2147483647L) {
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return (int) size;
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}
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} catch (IOException unused) {
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}
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}
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long j = MAX_MEMORY;
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if (j > 2147483647L) {
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return Integer.MAX_VALUE;
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}
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return (int) j;
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static int calculateTagLength(int i) throws IOException {
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if (i < 31) {
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return 1;
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}
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if (i < 128) {
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return 2;
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}
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byte[] bArr = new byte[5];
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int i2 = 4;
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bArr[4] = (byte) (i & 127);
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do {
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i >>= 7;
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i2--;
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bArr[i2] = (byte) ((i & 127) | 128);
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} while (i > 127);
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return 6 - i2;
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}
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StreamUtil() {
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}
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}
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