summaryrefslogtreecommitdiffstats
path: root/mobile/android/thirdparty/com/squareup/picasso/MarkableInputStream.java
diff options
context:
space:
mode:
Diffstat (limited to 'mobile/android/thirdparty/com/squareup/picasso/MarkableInputStream.java')
-rw-r--r--mobile/android/thirdparty/com/squareup/picasso/MarkableInputStream.java157
1 files changed, 0 insertions, 157 deletions
diff --git a/mobile/android/thirdparty/com/squareup/picasso/MarkableInputStream.java b/mobile/android/thirdparty/com/squareup/picasso/MarkableInputStream.java
deleted file mode 100644
index 17043a1b0..000000000
--- a/mobile/android/thirdparty/com/squareup/picasso/MarkableInputStream.java
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright (C) 2013 Square, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.squareup.picasso;
-
-import java.io.BufferedInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-
-/**
- * An input stream wrapper that supports unlimited independent cursors for
- * marking and resetting. Each cursor is a token, and it's the caller's
- * responsibility to keep track of these.
- */
-final class MarkableInputStream extends InputStream {
- private final InputStream in;
-
- private long offset;
- private long reset;
- private long limit;
-
- private long defaultMark = -1;
-
- public MarkableInputStream(InputStream in) {
- if (!in.markSupported()) {
- in = new BufferedInputStream(in);
- }
- this.in = in;
- }
-
- /** Marks this place in the stream so we can reset back to it later. */
- @Override public void mark(int readLimit) {
- defaultMark = savePosition(readLimit);
- }
-
- /**
- * Returns an opaque token representing the current position in the stream.
- * Call {@link #reset(long)} to return to this position in the stream later.
- * It is an error to call {@link #reset(long)} after consuming more than
- * {@code readLimit} bytes from this stream.
- */
- public long savePosition(int readLimit) {
- long offsetLimit = offset + readLimit;
- if (limit < offsetLimit) {
- setLimit(offsetLimit);
- }
- return offset;
- }
-
- /**
- * Makes sure that the underlying stream can backtrack the full range from
- * {@code reset} thru {@code limit}. Since we can't call {@code mark()}
- * without also adjusting the reset-to-position on the underlying stream this
- * method resets first and then marks the union of the two byte ranges. On
- * buffered streams this additional cursor motion shouldn't result in any
- * additional I/O.
- */
- private void setLimit(long limit) {
- try {
- if (reset < offset && offset <= this.limit) {
- in.reset();
- in.mark((int) (limit - reset));
- skip(reset, offset);
- } else {
- reset = offset;
- in.mark((int) (limit - offset));
- }
- this.limit = limit;
- } catch (IOException e) {
- throw new IllegalStateException("Unable to mark: " + e);
- }
- }
-
- /** Resets the stream to the most recent {@link #mark mark}. */
- @Override public void reset() throws IOException {
- reset(defaultMark);
- }
-
- /** Resets the stream to the position recorded by {@code token}. */
- public void reset(long token) throws IOException {
- if (offset > limit || token < reset) {
- throw new IOException("Cannot reset");
- }
- in.reset();
- skip(reset, token);
- offset = token;
- }
-
- /** Skips {@code target - current} bytes and returns. */
- private void skip(long current, long target) throws IOException {
- while (current < target) {
- long skipped = in.skip(target - current);
- if (skipped == 0) {
- if (read() == -1) {
- break; // EOF
- } else {
- skipped = 1;
- }
- }
- current += skipped;
- }
- }
-
- @Override public int read() throws IOException {
- int result = in.read();
- if (result != -1) {
- offset++;
- }
- return result;
- }
-
- @Override public int read(byte[] buffer) throws IOException {
- int count = in.read(buffer);
- if (count != -1) {
- offset += count;
- }
- return count;
- }
-
- @Override public int read(byte[] buffer, int offset, int length) throws IOException {
- int count = in.read(buffer, offset, length);
- if (count != -1) {
- this.offset += count;
- }
- return count;
- }
-
- @Override public long skip(long byteCount) throws IOException {
- long skipped = in.skip(byteCount);
- offset += skipped;
- return skipped;
- }
-
- @Override public int available() throws IOException {
- return in.available();
- }
-
- @Override public void close() throws IOException {
- in.close();
- }
-
- @Override public boolean markSupported() {
- return in.markSupported();
- }
-}