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/*
* Copyright (C) 2019 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 okio
/**
* A sink that keeps a buffer internally so that callers can do small writes without a performance
* penalty.
*/
expect sealed interface BufferedSink : Sink {
/** This sink's internal buffer. */
val buffer: Buffer
fun write(byteString: ByteString): BufferedSink
fun write(byteString: ByteString, offset: Int, byteCount: Int): BufferedSink
/** Like [OutputStream.write], this writes a complete byte array to this sink. */
fun write(source: ByteArray): BufferedSink
/** Like [OutputStream.write], this writes `byteCount` bytes of `source`, starting at `offset`. */
fun write(source: ByteArray, offset: Int, byteCount: Int): BufferedSink
/**
* Removes all bytes from `source` and appends them to this sink. Returns the number of bytes read
* which will be 0 if `source` is exhausted.
*/
fun writeAll(source: Source): Long
/** Removes `byteCount` bytes from `source` and appends them to this sink. */
fun write(source: Source, byteCount: Long): BufferedSink
/**
* Encodes `string` in UTF-8 and writes it to this sink.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeUtf8("Uh uh uh!");
* buffer.writeByte(' ');
* buffer.writeUtf8("You didn't say the magic word!");
*
* assertEquals("Uh uh uh! You didn't say the magic word!", buffer.readUtf8());
* ```
*/
fun writeUtf8(string: String): BufferedSink
/**
* Encodes the characters at `beginIndex` up to `endIndex` from `string` in UTF-8 and writes it to
* this sink.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeUtf8("I'm a hacker!\n", 6, 12);
* buffer.writeByte(' ');
* buffer.writeUtf8("That's what I said: you're a nerd.\n", 29, 33);
* buffer.writeByte(' ');
* buffer.writeUtf8("I prefer to be called a hacker!\n", 24, 31);
*
* assertEquals("hacker nerd hacker!", buffer.readUtf8());
* ```
*/
fun writeUtf8(string: String, beginIndex: Int, endIndex: Int): BufferedSink
/** Encodes `codePoint` in UTF-8 and writes it to this sink. */
fun writeUtf8CodePoint(codePoint: Int): BufferedSink
/** Writes a byte to this sink. */
fun writeByte(b: Int): BufferedSink
/**
* Writes a big-endian short to this sink using two bytes.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeShort(32767);
* buffer.writeShort(15);
*
* assertEquals(4, buffer.size());
* assertEquals((byte) 0x7f, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x0f, buffer.readByte());
* assertEquals(0, buffer.size());
* ```
*/
fun writeShort(s: Int): BufferedSink
/**
* Writes a little-endian short to this sink using two bytes.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeShortLe(32767);
* buffer.writeShortLe(15);
*
* assertEquals(4, buffer.size());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0x7f, buffer.readByte());
* assertEquals((byte) 0x0f, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals(0, buffer.size());
* ```
*/
fun writeShortLe(s: Int): BufferedSink
/**
* Writes a big-endian int to this sink using four bytes.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeInt(2147483647);
* buffer.writeInt(15);
*
* assertEquals(8, buffer.size());
* assertEquals((byte) 0x7f, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x0f, buffer.readByte());
* assertEquals(0, buffer.size());
* ```
*/
fun writeInt(i: Int): BufferedSink
/**
* Writes a little-endian int to this sink using four bytes.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeIntLe(2147483647);
* buffer.writeIntLe(15);
*
* assertEquals(8, buffer.size());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0x7f, buffer.readByte());
* assertEquals((byte) 0x0f, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals(0, buffer.size());
* ```
*/
fun writeIntLe(i: Int): BufferedSink
/**
* Writes a big-endian long to this sink using eight bytes.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeLong(9223372036854775807L);
* buffer.writeLong(15);
*
* assertEquals(16, buffer.size());
* assertEquals((byte) 0x7f, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x0f, buffer.readByte());
* assertEquals(0, buffer.size());
* ```
*/
fun writeLong(v: Long): BufferedSink
/**
* Writes a little-endian long to this sink using eight bytes.
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeLongLe(9223372036854775807L);
* buffer.writeLongLe(15);
*
* assertEquals(16, buffer.size());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0xff, buffer.readByte());
* assertEquals((byte) 0x7f, buffer.readByte());
* assertEquals((byte) 0x0f, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals((byte) 0x00, buffer.readByte());
* assertEquals(0, buffer.size());
* ```
*/
fun writeLongLe(v: Long): BufferedSink
/**
* Writes a long to this sink in signed decimal form (i.e., as a string in base 10).
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeDecimalLong(8675309L);
* buffer.writeByte(' ');
* buffer.writeDecimalLong(-123L);
* buffer.writeByte(' ');
* buffer.writeDecimalLong(1L);
*
* assertEquals("8675309 -123 1", buffer.readUtf8());
* ```
*/
fun writeDecimalLong(v: Long): BufferedSink
/**
* Writes a long to this sink in hexadecimal form (i.e., as a string in base 16).
*
* ```java
* Buffer buffer = new Buffer();
* buffer.writeHexadecimalUnsignedLong(65535L);
* buffer.writeByte(' ');
* buffer.writeHexadecimalUnsignedLong(0xcafebabeL);
* buffer.writeByte(' ');
* buffer.writeHexadecimalUnsignedLong(0x10L);
*
* assertEquals("ffff cafebabe 10", buffer.readUtf8());
* ```
*/
fun writeHexadecimalUnsignedLong(v: Long): BufferedSink
/**
* Writes all buffered data to the underlying sink, if one exists. Then that sink is recursively
* flushed which pushes data as far as possible towards its ultimate destination. Typically that
* destination is a network socket or file.
*
* ```java
* BufferedSink b0 = new Buffer();
* BufferedSink b1 = Okio.buffer(b0);
* BufferedSink b2 = Okio.buffer(b1);
*
* b2.writeUtf8("hello");
* assertEquals(5, b2.buffer().size());
* assertEquals(0, b1.buffer().size());
* assertEquals(0, b0.buffer().size());
*
* b2.flush();
* assertEquals(0, b2.buffer().size());
* assertEquals(0, b1.buffer().size());
* assertEquals(5, b0.buffer().size());
* ```
*/
override fun flush()
/**
* Writes all buffered data to the underlying sink, if one exists. Like [flush], but weaker. Call
* this before this buffered sink goes out of scope so that its data can reach its destination.
*
* ```java
* BufferedSink b0 = new Buffer();
* BufferedSink b1 = Okio.buffer(b0);
* BufferedSink b2 = Okio.buffer(b1);
*
* b2.writeUtf8("hello");
* assertEquals(5, b2.buffer().size());
* assertEquals(0, b1.buffer().size());
* assertEquals(0, b0.buffer().size());
*
* b2.emit();
* assertEquals(0, b2.buffer().size());
* assertEquals(5, b1.buffer().size());
* assertEquals(0, b0.buffer().size());
*
* b1.emit();
* assertEquals(0, b2.buffer().size());
* assertEquals(0, b1.buffer().size());
* assertEquals(5, b0.buffer().size());
* ```
*/
fun emit(): BufferedSink
/**
* Writes complete segments to the underlying sink, if one exists. Like [flush], but weaker. Use
* this to limit the memory held in the buffer to a single segment. Typically application code
* will not need to call this: it is only necessary when application code writes directly to this
* [sink's buffer][buffer].
*
* ```java
* BufferedSink b0 = new Buffer();
* BufferedSink b1 = Okio.buffer(b0);
* BufferedSink b2 = Okio.buffer(b1);
*
* b2.buffer().write(new byte[20_000]);
* assertEquals(20_000, b2.buffer().size());
* assertEquals( 0, b1.buffer().size());
* assertEquals( 0, b0.buffer().size());
*
* b2.emitCompleteSegments();
* assertEquals( 3_616, b2.buffer().size());
* assertEquals( 0, b1.buffer().size());
* assertEquals(16_384, b0.buffer().size()); // This example assumes 8192 byte segments.
* ```
*/
fun emitCompleteSegments(): BufferedSink
}
