/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 * Jonathan Schleifer <js@heap.zone> * * All rights reserved. * * This file is part of ObjFW. It may be distributed under the terms of the * Q Public License 1.0, which can be found in the file LICENSE.QPL included in * the packaging of this file. * * Alternatively, it may be distributed under the terms of the GNU General * Public License, either version 2 or 3, which can be found in the file * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this * file. */ #ifndef __STDC_LIMIT_MACROS # define __STDC_LIMIT_MACROS #endif #ifndef __STDC_CONSTANT_MACROS # define __STDC_CONSTANT_MACROS #endif #include <stdarg.h> #import "OFObject.h" #import "OFString.h" #ifdef OF_HAVE_SOCKETS # import "OFKernelEventObserver.h" #endif OF_ASSUME_NONNULL_BEGIN /*! @file */ @class OFStream; @class OFData; #if defined(OF_HAVE_SOCKETS) && defined(OF_HAVE_BLOCKS) /*! * @brief A block which is called when data was read from the stream. * * @param stream The stream on which data was read * @param buffer A buffer with the data that has been read * @param length The length of the data that has been read * @param exception An exception which occurred while reading or `nil` on * success * @return A bool whether the same block should be used for the next read */ typedef bool (^of_stream_async_read_block_t)(OFStream *stream, void *buffer, size_t length, id _Nullable exception); /*! * @brief A block which is called when a line was read from the stream. * * @param stream The stream on which a line was read * @param line The line which has been read or `nil` when the end of stream * occurred * @param exception An exception which occurred while reading or `nil` on * success * @return A bool whether the same block should be used for the next read */ typedef bool (^of_stream_async_read_line_block_t)(OFStream *stream, OFString *_Nullable line, id _Nullable exception); /*! * @brief A block which is called when data was written to the stream. * * @param stream The stream to which data was written * @param buffer A pointer to the buffer which was written to the stream. This * can be changed to point to a different buffer to be used on the * next write. * @param bytesWritten The number of bytes which have been written. This * matches the length specified on the asynchronous write * if no exception was encountered. * @param exception An exception which occurred while writing or `nil` on * success * @return The length to repeat the write with or 0 if it should not repeat. * The buffer may be changed, so that every time a new buffer and length * can be specified while the callback stays the same. */ typedef size_t (^of_stream_async_write_block_t)(OFStream *stream, const void *_Nonnull *_Nonnull buffer, size_t bytesWritten, id _Nullable exception); #endif /*! * @class OFStream OFStream.h ObjFW/OFStream.h * * @brief A base class for different types of streams. * * @warning Even though the OFCopying protocol is implemented, it does *not* * return an independent copy of the stream, but instead retains it. * This is so that the stream can be used as a key for a dictionary, * so context can be associated with a stream. Using a stream in more * than one thread at the same time is not thread-safe, even if copy * was called to create one "instance" for every thread! * * @note If you want to subclass this, override * @ref lowlevelReadIntoBuffer:length:, @ref lowlevelWriteBuffer:length: * and @ref lowlevelIsAtEndOfStream, but nothing else, as those are are * the methods that do the actual work. OFStream uses those for all other * methods and does all the caching and other stuff for you. If you * override these methods without the `lowlevel` prefix, you *will* break * caching and get broken results! */ @interface OFStream: OFObject < #ifdef OF_HAVE_SOCKETS OFReadyForReadingObserving, OFReadyForWritingObserving, #endif OFCopying> { #if !defined(OF_SEEKABLE_STREAM_M) && !defined(OF_TCP_SOCKET_M) @private #endif char *_Nullable _readBuffer, *_Nullable _readBufferMemory; char *_Nullable _writeBuffer; size_t _readBufferLength, _writeBufferLength; bool _writeBuffered, _waitingForDelimiter; @protected bool _blocking; } /*! * @brief Whether the end of the stream has been reached. */ @property (readonly, nonatomic, getter=isAtEndOfStream) bool atEndOfStream; /*! * @brief Whether writes are buffered. */ @property (nonatomic, nonatomic, getter=isWriteBuffered) bool writeBuffered; /*! * @brief Whether data is present in the internal read buffer. */ @property (readonly, nonatomic) bool hasDataInReadBuffer; /*! * @brief Whether the stream is in blocking mode. * * By default, a stream is in blocking mode. * On Win32, setting this currently only works for sockets! */ @property (readonly, nonatomic, getter=isBlocking) bool blocking; /*! * @brief The file descriptor for the read end of the stream. */ @property (readonly, nonatomic) int fileDescriptorForReading; /*! * @brief The file descriptor for the write end of the stream. */ @property (readonly, nonatomic) int fileDescriptorForWriting; /*! * @brief Reads *at most* size bytes from the stream into a buffer. * * On network streams, this might read less than the specified number of bytes. * If you want to read exactly the specified number of bytes, use * @ref readIntoBuffer:exactLength:. Note that a read can even return 0 bytes - * this does not necessarily mean that the stream ended, so you still need to * check @ref atEndOfStream. * * @param buffer The buffer into which the data is read * @param length The length of the data that should be read at most. * The buffer *must* be *at least* this big! * @return The number of bytes read */ - (size_t)readIntoBuffer: (void *)buffer length: (size_t)length; /*! * @brief Reads exactly the specified length bytes from the stream into a * buffer. * * Unlike @ref readIntoBuffer:length:, this method does not return when less * than the specified length has been read - instead, it waits until it got * exactly the specified length. * * @warning Only call this when you know that specified amount of data is * available! Otherwise you will get an exception! * * @param buffer The buffer into which the data is read * @param length The length of the data that should be read. * The buffer *must* be *at least* this big! */ - (void)readIntoBuffer: (void *)buffer exactLength: (size_t)length; #ifdef OF_HAVE_SOCKETS /*! * @brief Asynchronously reads *at most* size bytes from the stream into a * buffer. * * On network streams, this might read less than the specified number of bytes. * If you want to read exactly the specified number of bytes, use * @ref asyncReadIntoBuffer:exactLength:target:selector:context:. Note that a * read can even return 0 bytes - this does not necessarily mean that the * stream ended, so you still need to check @ref atEndOfStream. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param buffer The buffer into which the data is read. * The buffer must not be freed before the async read completed! * @param length The length of the data that should be read at most. * The buffer *must* be *at least* this big! * @param target The target on which the selector should be called when the * data has been received. If the method returns true, it will be * called again with the same buffer and maximum length when more * data has been received. If you want the next method in the * queue to handle the data received next, you need to return * false from the method. * @param selector The selector to call on the target. The signature must be * `bool (OFStream *stream, void *buffer, size_t length, * id context, id exception)`. * @param context A context object to pass along to the target */ - (void)asyncReadIntoBuffer: (void *)buffer length: (size_t)length target: (id)target selector: (SEL)selector context: (nullable id)context; /*! * @brief Asynchronously reads exactly the specified length bytes from the * stream into a buffer. * * Unlike @ref asyncReadIntoBuffer:length:target:selector:context:, this method * does not call the method when less than the specified length has been read - * instead, it waits until it got exactly the specified length, the stream has * ended or an exception occurred. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param buffer The buffer into which the data is read * @param length The length of the data that should be read. * The buffer *must* be *at least* this big! * @param target The target on which the selector should be called when the * data has been received. If the method returns true, it will be * called again with the same buffer and exact length when more * data has been received. If you want the next method in the * queue to handle the data received next, you need to return * false from the method. * @param selector The selector to call on the target. The signature must be * `bool (OFStream *stream, void *buffer, size_t size, * id context, id exception)`. * @param context A context object to pass along to the target */ - (void)asyncReadIntoBuffer: (void *)buffer exactLength: (size_t)length target: (id)target selector: (SEL)selector context: (nullable id)context; # ifdef OF_HAVE_BLOCKS /*! * @brief Asynchronously reads *at most* ref size bytes from the stream into a * buffer. * * On network streams, this might read less than the specified number of bytes. * If you want to read exactly the specified number of bytes, use * @ref asyncReadIntoBuffer:exactLength:block:. Note that a read can even * return 0 bytes - this does not necessarily mean that the stream ended, so * you still need to check @ref atEndOfStream. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param buffer The buffer into which the data is read. * The buffer must not be freed before the async read completed! * @param length The length of the data that should be read at most. * The buffer *must* be *at least* this big! * @param block The block to call when the data has been received. * If the block returns true, it will be called again with the same * buffer and maximum length when more data has been received. If * you want the next block in the queue to handle the data * received next, you need to return false from the block. */ - (void)asyncReadIntoBuffer: (void *)buffer length: (size_t)length block: (of_stream_async_read_block_t)block; /*! * @brief Asynchronously reads exactly the specified length bytes from the * stream into a buffer. * * Unlike @ref asyncReadIntoBuffer:length:block:, this method does not invoke * the block when less than the specified length has been read - instead, it * waits until it got exactly the specified length, the stream has ended or an * exception occurred. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param buffer The buffer into which the data is read * @param length The length of the data that should be read. * The buffer *must* be *at least* this big! * @param block The block to call when the data has been received. * If the block returns true, it will be called again with the same * buffer and exact length when more data has been received. If * you want the next block in the queue to handle the data * received next, you need to return false from the block. */ - (void)asyncReadIntoBuffer: (void *)buffer exactLength: (size_t)length block: (of_stream_async_read_block_t)block; # endif #endif /*! * @brief Reads a uint8_t from the stream. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint8_t from the stream */ - (uint8_t)readInt8; /*! * @brief Reads a uint16_t from the stream which is encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint16_t from the stream in native endianess */ - (uint16_t)readBigEndianInt16; /*! * @brief Reads a uint32_t from the stream which is encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint32_t from the stream in the native endianess */ - (uint32_t)readBigEndianInt32; /*! * @brief Reads a uint64_t from the stream which is encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint64_t from the stream in the native endianess */ - (uint64_t)readBigEndianInt64; /*! * @brief Reads a float from the stream which is encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A float from the stream in the native endianess */ - (float)readBigEndianFloat; /*! * @brief Reads a double from the stream which is encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A double from the stream in the native endianess */ - (double)readBigEndianDouble; /*! * @brief Reads the specified number of uint16_ts from the stream which are * encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * uint16_ts * @param count The number of uint16_ts to read * @return The number of bytes read */ - (size_t)readBigEndianInt16sIntoBuffer: (uint16_t *)buffer count: (size_t)count; /*! * @brief Reads the specified number of uint32_ts from the stream which are * encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * uint32_ts * @param count The number of uint32_ts to read * @return The number of bytes read */ - (size_t)readBigEndianInt32sIntoBuffer: (uint32_t *)buffer count: (size_t)count; /*! * @brief Reads the specified number of uint64_ts from the stream which are * encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * uint64_ts * @param count The number of uint64_ts to read * @return The number of bytes read */ - (size_t)readBigEndianInt64sIntoBuffer: (uint64_t *)buffer count: (size_t)count; /*! * @brief Reads the specified number of floats from the stream which are encoded * in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * floats * @param count The number of floats to read * @return The number of bytes read */ - (size_t)readBigEndianFloatsIntoBuffer: (float *)buffer count: (size_t)count; /*! * @brief Reads the specified number of doubles from the stream which are * encoded in big endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * doubles * @param count The number of doubles to read * @return The number of bytes read */ - (size_t)readBigEndianDoublesIntoBuffer: (double *)buffer count: (size_t)count; /*! * @brief Reads a uint16_t from the stream which is encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint16_t from the stream in native endianess */ - (uint16_t)readLittleEndianInt16; /*! * @brief Reads a uint32_t from the stream which is encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint32_t from the stream in the native endianess */ - (uint32_t)readLittleEndianInt32; /*! * @brief Reads a uint64_t from the stream which is encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A uint64_t from the stream in the native endianess */ - (uint64_t)readLittleEndianInt64; /*! * @brief Reads a float from the stream which is encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A float from the stream in the native endianess */ - (float)readLittleEndianFloat; /*! * @brief Reads a double from the stream which is encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @return A double from the stream in the native endianess */ - (double)readLittleEndianDouble; /*! * @brief Reads the specified number of uint16_ts from the stream which are * encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * uint16_ts * @param count The number of uint16_ts to read * @return The number of bytes read */ - (size_t)readLittleEndianInt16sIntoBuffer: (uint16_t *)buffer count: (size_t)count; /*! * @brief Reads the specified number of uint32_ts from the stream which are * encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * uint32_ts * @param count The number of uint32_ts to read * @return The number of bytes read */ - (size_t)readLittleEndianInt32sIntoBuffer: (uint32_t *)buffer count: (size_t)count; /*! * @brief Reads the specified number of uint64_ts from the stream which are * encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * uint64_ts * @param count The number of uint64_ts to read * @return The number of bytes read */ - (size_t)readLittleEndianInt64sIntoBuffer: (uint64_t *)buffer count: (size_t)count; /*! * @brief Reads the specified number of floats from the stream which are * encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * floats * @param count The number of floats to read * @return The number of bytes read */ - (size_t)readLittleEndianFloatsIntoBuffer: (float *)buffer count: (size_t)count; /*! * @brief Reads the specified number of doubles from the stream which are * encoded in little endian. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param buffer A buffer of sufficient size to store the specified number of * doubles * @param count The number of doubles to read * @return The number of bytes read */ - (size_t)readLittleEndianDoublesIntoBuffer: (double *)buffer count: (size_t)count; /*! * @brief Reads the specified number of items with an item size of 1 from the * stream and returns them as OFData. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param count The number of items to read * @return OFData with count items. */ - (OFData *)readDataWithCount: (size_t)count; /*! * @brief Reads the specified number of items with the specified item size from * the stream and returns them as OFData. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param itemSize The size of each item * @param count The number of items to read * @return OFData with count items. */ - (OFData *)readDataWithItemSize: (size_t)itemSize count: (size_t)count; /*! * @brief Returns OFData with all the remaining data of the stream. * * @return OFData with an item size of 1 with all the data of the stream until * the end of the stream is reached. */ - (OFData *)readDataUntilEndOfStream; /*! * @brief Reads a string with the specified length from the stream. * * If `\0` appears in the stream, the string will be truncated at the `\0` and * the rest of the bytes of the string will be lost. This way, reading from the * stream will not break because of a `\0` because the specified number of * bytes is still being read and only the string gets truncated. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param length The length (in bytes) of the string to read from the stream * @return A string with the specified length */ - (OFString *)readStringWithLength: (size_t)length; /*! * @brief Reads a string with the specified encoding and length from the stream. * * If a `\0` appears in the stream, the string will be truncated at the `\0` * and the rest of the bytes of the string will be lost. This way, reading from * the stream will not break because of a `\0` because the specified number of * bytes is still being read and only the string gets truncated. * * @warning Only call this when you know that enough data is available! * Otherwise you will get an exception! * * @param encoding The encoding of the string to read from the stream * @param length The length (in bytes) of the string to read from the stream * @return A string with the specified length */ - (OFString *)readStringWithLength: (size_t)length encoding: (of_string_encoding_t)encoding; /*! * @brief Reads until a newline, `\0` or end of stream occurs. * * @return The line that was read, autoreleased, or `nil` if the end of the * stream has been reached. */ - (nullable OFString *)readLine; /*! * @brief Reads with the specified encoding until a newline, `\0` or end of * stream occurs. * * @param encoding The encoding used by the stream * @return The line that was read, autoreleased, or `nil` if the end of the * stream has been reached. */ - (nullable OFString *)readLineWithEncoding: (of_string_encoding_t)encoding; #ifdef OF_HAVE_SOCKETS /*! * @brief Asynchronously reads until a newline, `\0`, end of stream or an * exception occurs. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param target The target on which to call the selector when the data has * been received. If the method returns true, it will be called * again when the next line has been received. If you want the * next method in the queue to handle the next line, you need to * return false from the method * @param selector The selector to call on the target. The signature must be * `bool (OFStream *stream, OFString *line, id context, * id exception)`. * @param context A context object to pass along to the target */ - (void)asyncReadLineWithTarget: (id)target selector: (SEL)selector context: (nullable id)context; /*! * @brief Asynchronously reads with the specified encoding until a newline, * `\0`, end of stream or an exception occurs. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param encoding The encoding used by the stream * @param target The target on which to call the selector when the data has * been received. If the method returns true, it will be called * again when the next line has been received. If you want the * next method in the queue to handle the next line, you need to * return false from the method * @param selector The selector to call on the target. The signature must be * `bool (OFStream *stream, OFString *line, id context, * id exception)`. * @param context A context object to pass along to the target */ - (void)asyncReadLineWithEncoding: (of_string_encoding_t)encoding target: (id)target selector: (SEL)selector context: (nullable id)context; # ifdef OF_HAVE_BLOCKS /*! * @brief Asynchronously reads until a newline, `\0`, end of stream or an * exception occurs. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param block The block to call when the data has been received. * If the block returns true, it will be called again when the next * line has been received. If you want the next block in the queue * to handle the next line, you need to return false from the * block. */ - (void)asyncReadLineWithBlock: (of_stream_async_read_line_block_t)block; /*! * @brief Asynchronously reads with the specified encoding until a newline, * `\0`, end of stream or an exception occurs. * * @note The stream must implement @ref fileDescriptorForReading and return a * valid file descriptor in order for this to work! * * @param encoding The encoding used by the stream * @param block The block to call when the data has been received. * If the block returns true, it will be called again when the next * line has been received. If you want the next block in the queue * to handle the next line, you need to return false from the * block. */ - (void)asyncReadLineWithEncoding: (of_string_encoding_t)encoding block: (of_stream_async_read_line_block_t)block; # endif #endif /*! * @brief Tries to read a line from the stream (see @ref readLine) and returns * `nil` if no complete line has been received yet. * * @return The line that was read, autoreleased, or `nil` if the line is not * complete yet */ - (nullable OFString *)tryReadLine; /*! * @brief Tries to read a line from the stream with the specified encoding (see * @ref readLineWithEncoding:) and returns `nil` if no complete line has * been received yet. * * @param encoding The encoding used by the stream * @return The line that was read, autoreleased, or `nil` if the line is not * complete yet */ - (nullable OFString *)tryReadLineWithEncoding: (of_string_encoding_t)encoding; /*! * @brief Reads until the specified string or `\0` is found or the end of * stream occurs. * * @param delimiter The delimiter * @return The line that was read, autoreleased, or `nil` if the end of the * stream has been reached. */ - (nullable OFString *)readTillDelimiter: (OFString *)delimiter; /*! * @brief Reads until the specified string or `\0` is found or the end of * stream occurs. * * @param delimiter The delimiter * @param encoding The encoding used by the stream * @return The line that was read, autoreleased, or `nil` if the end of the * stream has been reached. */ - (nullable OFString *)readTillDelimiter: (OFString *)delimiter encoding: (of_string_encoding_t)encoding; /*! * @brief Tries to reads until the specified string or `\0` is found or the end * of stream (see @ref readTillDelimiter:) and returns `nil` if not * enough data has been received yet. * * @param delimiter The delimiter * @return The line that was read, autoreleased, or `nil` if the end of the * stream has been reached. */ - (nullable OFString *)tryReadTillDelimiter: (OFString *)delimiter; /*! * @brief Tries to read until the specified string or `\0` is found or the end * of stream occurs (see @ref readTillDelimiter:encoding:) and returns * `nil` if not enough data has been received yet. * * @param delimiter The delimiter * @param encoding The encoding used by the stream * @return The line that was read, autoreleased, or `nil` if the end of the * stream has been reached. */ - (nullable OFString *)tryReadTillDelimiter: (OFString *)delimiter encoding: (of_string_encoding_t)encoding; /*! * @brief Writes everything in the write buffer to the stream. */ - (void)flushWriteBuffer; /*! * @brief Writes from a buffer into the stream. * * @param buffer The buffer from which the data is written into the stream * @param length The length of the data that should be written * @return The number of bytes written. This can only differ from the specified * length in non-blocking mode. */ - (size_t)writeBuffer: (const void *)buffer length: (size_t)length; #ifdef OF_HAVE_SOCKETS /*! * @brief Asynchronously writes a buffer into the stream. * * @note The stream must implement @ref fileDescriptorForWriting and return a * valid file descriptor in order for this to work! * * @param buffer The buffer from which the data is written into the stream. The * buffer needs to be valid until the write request is completed! * @param length The length of the data that should be written * @param target The target on which the selector should be called when the * data has been written. The method should return the length for * the next write with the same callback or 0 if it should not * repeat. The buffer may be changed, so that every time a new * buffer and length can be specified while the callback stays * the same. * @param selector The selector to call on the target. The signature must be * `size_t (OFStream *stream, const void *buffer, * size_t bytesWritten, id context, id exception)`. * @param context A context object to pass along to the target */ - (void)asyncWriteBuffer: (const void *)buffer length: (size_t)length target: (id)target selector: (SEL)selector context: (nullable id)context; # ifdef OF_HAVE_BLOCKS /*! * @brief Asynchronously writes a buffer into the stream. * * @note The stream must implement @ref fileDescriptorForWriting and return a * valid file descriptor in order for this to work! * * @param buffer The buffer from which the data is written into the stream. The * buffer needs to be valid until the write request is completed! * @param length The length of the data that should be written * @param block The block to call when the data has been written. It should * return the length for the next write with the same callback or * 0 if it should not repeat. The buffer may be changed, so that * every time a new buffer and length can be specified while the * callback stays the same. */ - (void)asyncWriteBuffer: (const void *)buffer length: (size_t)length block: (of_stream_async_write_block_t)block; # endif #endif /*! * @brief Writes a uint8_t into the stream. * * @param int8 A uint8_t */ - (void)writeInt8: (uint8_t)int8; /*! * @brief Writes a uint16_t into the stream, encoded in big endian. * * @param int16 A uint16_t */ - (void)writeBigEndianInt16: (uint16_t)int16; /*! * @brief Writes a uint32_t into the stream, encoded in big endian. * * @param int32 A uint32_t */ - (void)writeBigEndianInt32: (uint32_t)int32; /*! * @brief Writes a uint64_t into the stream, encoded in big endian. * * @param int64 A uint64_t */ - (void)writeBigEndianInt64: (uint64_t)int64; /*! * @brief Writes a float into the stream, encoded in big endian. * * @param float_ A float */ - (void)writeBigEndianFloat: (float)float_; /*! * @brief Writes a double into the stream, encoded in big endian. * * @param double_ A double */ - (void)writeBigEndianDouble: (double)double_; /*! * @brief Writes the specified number of uint16_ts into the stream, encoded in * big endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of uint16_ts to write * @return The number of bytes written to the stream */ - (size_t)writeBigEndianInt16s: (const uint16_t *)buffer count: (size_t)count; /*! * @brief Writes the specified number of uint32_ts into the stream, encoded in * big endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of uint32_ts to write * @return The number of bytes written to the stream */ - (size_t)writeBigEndianInt32s: (const uint32_t *)buffer count: (size_t)count; /*! * @brief Writes the specified number of uint64_ts into the stream, encoded in * big endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of uint64_ts to write * @return The number of bytes written to the stream */ - (size_t)writeBigEndianInt64s: (const uint64_t *)buffer count: (size_t)count; /*! * @brief Writes the specified number of floats into the stream, encoded in big * endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of floats to write * @return The number of bytes written to the stream */ - (size_t)writeBigEndianFloats: (const float *)buffer count: (size_t)count; /*! * @brief Writes the specified number of doubles into the stream, encoded in * big endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of doubles to write * @return The number of bytes written to the stream */ - (size_t)writeBigEndianDoubles: (const double *)buffer count: (size_t)count; /*! * @brief Writes a uint16_t into the stream, encoded in little endian. * * @param int16 A uint16_t */ - (void)writeLittleEndianInt16: (uint16_t)int16; /*! * @brief Writes a uint32_t into the stream, encoded in little endian. * * @param int32 A uint32_t */ - (void)writeLittleEndianInt32: (uint32_t)int32; /*! * @brief Writes a uint64_t into the stream, encoded in little endian. * * @param int64 A uint64_t */ - (void)writeLittleEndianInt64: (uint64_t)int64; /*! * @brief Writes a float into the stream, encoded in little endian. * * @param float_ A float */ - (void)writeLittleEndianFloat: (float)float_; /*! * @brief Writes a double into the stream, encoded in little endian. * * @param double_ A double */ - (void)writeLittleEndianDouble: (double)double_; /*! * @brief Writes the specified number of uint16_ts into the stream, encoded in * little endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of uint16_ts to write * @return The number of bytes written to the stream */ - (size_t)writeLittleEndianInt16s: (const uint16_t *)buffer count: (size_t)count; /*! * @brief Writes the specified number of uint32_ts into the stream, encoded in * little endian. * * @param count The number of uint32_ts to write * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @return The number of bytes written to the stream */ - (size_t)writeLittleEndianInt32s: (const uint32_t *)buffer count: (size_t)count; /*! * @brief Writes the specified number of uint64_ts into the stream, encoded in * little endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of uint64_ts to write * @return The number of bytes written to the stream */ - (size_t)writeLittleEndianInt64s: (const uint64_t *)buffer count: (size_t)count; /*! * @brief Writes the specified number of floats into the stream, encoded in * little endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of floats to write * @return The number of bytes written to the stream */ - (size_t)writeLittleEndianFloats: (const float *)buffer count: (size_t)count; /*! * @brief Writes the specified number of doubles into the stream, encoded in * little endian. * * @param buffer The buffer from which the data is written to the stream after * it has been byte swapped if necessary * @param count The number of doubles to write * @return The number of bytes written to the stream */ - (size_t)writeLittleEndianDoubles: (const double *)buffer count: (size_t)count; /*! * @brief Writes OFData into the stream. * * @param data The OFData to write into the stream * @return The number of bytes written */ - (size_t)writeData: (OFData *)data; /*! * @brief Writes a string into the stream, without the trailing zero. * * @param string The string from which the data is written to the stream * @return The number of bytes written */ - (size_t)writeString: (OFString *)string; /*! * @brief Writes a string into the stream in the specified encoding, without * the trailing zero. * * @param string The string from which the data is written to the stream * @param encoding The encoding in which to write the string to the stream * @return The number of bytes written */ - (size_t)writeString: (OFString *)string encoding: (of_string_encoding_t)encoding; /*! * @brief Writes a string into the stream with a trailing newline. * * @param string The string from which the data is written to the stream * @return The number of bytes written */ - (size_t)writeLine: (OFString *)string; /*! * @brief Writes a string into the stream in the specified encoding with a * trailing newline. * * @param string The string from which the data is written to the stream * @param encoding The encoding in which to write the string to the stream * @return The number of bytes written */ - (size_t)writeLine: (OFString *)string encoding: (of_string_encoding_t)encoding; /*! * @brief Writes a formatted string into the stream. * * See printf for the format syntax. As an addition, `%@` is available as * format specifier for objects, `%C` for `of_unichar_t` and `%S` for * `const of_unichar_t *`. * * @param format A string used as format * @return The number of bytes written */ - (size_t)writeFormat: (OFConstantString *)format, ...; /*! * @brief Writes a formatted string into the stream. * * See printf for the format syntax. As an addition, `%@` is available as * format specifier for objects, `%C` for `of_unichar_t` and `%S` for * `const of_unichar_t *`. * * @param format A string used as format * @param arguments The arguments used in the format string * @return The number of bytes written */ - (size_t)writeFormat: (OFConstantString *)format arguments: (va_list)arguments; #ifdef OF_HAVE_SOCKETS /*! * @brief Cancels all pending asynchronous requests on the stream. */ - (void)cancelAsyncRequests; #endif /*! * @brief "Reverses" a read operation, meaning the bytes from the specified * buffer will be returned on the next read operation. * * This is useful for reading into a buffer, parsing the data and then giving * back the data which does not need to be processed. This can be used to * optimize situations in which the length of the data that needs to be * processed is not known before all data has been processed - for example in * decompression - in which it would otherwise be necessary to read byte by * byte to avoid consuming bytes that need to be parsed by something else - * for example the data descriptor in a ZIP archive which immediately follows * the compressed data. * * If the stream is a file, this method does not change any data in the file. * * If the stream is seekable, a seek operation will discard any data which was * unread. * * @param buffer The buffer to unread * @param length The length of the buffer to unread */ - (void)unreadFromBuffer: (const void *)buffer length: (size_t)length; /*! * @brief Closes the stream. * * @note If you override this, make sure to call `[super close]`! */ - (void)close; /*! * @brief Performs a lowlevel read. * * @warning Do not call this directly! * * @note Override this method with your actual read implementation when * subclassing! * * @param buffer The buffer for the data to read * @param length The length of the buffer * @return The number of bytes read */ - (size_t)lowlevelReadIntoBuffer: (void *)buffer length: (size_t)length; /*! * @brief Performs a lowlevel write. * * @warning Do not call this directly! * * @note Override this method with your actual write implementation when * subclassing! * * @param buffer The buffer with the data to write * @param length The length of the data to write * @return The number of bytes written */ - (size_t)lowlevelWriteBuffer: (const void *)buffer length: (size_t)length; /*! * @brief Returns whether the lowlevel is at the end of the stream. * * @warning Do not call this directly! * * @note Override this method with your actual end of stream checking * implementation when subclassing! * * @return Whether the lowlevel is at the end of the stream */ - (bool)lowlevelIsAtEndOfStream; @end OF_ASSUME_NONNULL_END