41 lines
1.4 KiB
Java
41 lines
1.4 KiB
Java
package com.genymobile.scrcpy;
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import android.system.ErrnoException;
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import android.system.Os;
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import android.system.OsConstants;
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import java.io.FileDescriptor;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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public final class IO {
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private IO() {
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// not instantiable
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}
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public static void writeFully(FileDescriptor fd, ByteBuffer from) throws IOException {
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// ByteBuffer position is not updated as expected by Os.write() on old Android versions, so
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// count the remaining bytes manually.
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// See <https://github.com/Genymobile/scrcpy/issues/291>.
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int remaining = from.remaining();
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while (remaining > 0) {
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try {
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int w = Os.write(fd, from);
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if (BuildConfig.DEBUG && w < 0) {
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// w should not be negative, since an exception is thrown on error
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throw new AssertionError("Os.write() returned a negative value (" + w + ")");
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}
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remaining -= w;
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} catch (ErrnoException e) {
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if (e.errno != OsConstants.EINTR) {
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throw new IOException(e);
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}
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}
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}
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}
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public static void writeFully(FileDescriptor fd, byte[] buffer, int offset, int len) throws IOException {
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writeFully(fd, ByteBuffer.wrap(buffer, offset, len));
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}
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}
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