Initial release
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civ
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// This file is part of VSTGUI. It is subject to the license terms
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// in the LICENSE file found in the top-level directory of this
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// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
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#pragma once
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#include "../lib/vstguifwd.h"
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#include "../lib/optional.h"
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#include <algorithm>
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#include <string>
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#include <limits>
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#include <memory>
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#include <vector>
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#include <iostream>
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namespace VSTGUI {
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/**
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ByteOrder aware output stream interface
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*/
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class OutputStream
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{
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public:
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explicit OutputStream (ByteOrder byteOrder = kNativeByteOrder) : byteOrder (byteOrder) {}
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virtual ~OutputStream () noexcept = default;
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ByteOrder getByteOrder () const { return byteOrder; }
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void setByteOrder (ByteOrder newByteOrder) { byteOrder = newByteOrder; }
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bool operator<< (const int8_t& input);
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bool operator<< (const uint8_t& input);
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bool operator<< (const int16_t& input);
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bool operator<< (const uint16_t& input);
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bool operator<< (const int32_t& input);
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bool operator<< (const uint32_t& input);
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bool operator<< (const int64_t& input);
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bool operator<< (const uint64_t& input);
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bool operator<< (const double& input);
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virtual bool operator<< (const std::string& str) = 0;
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virtual uint32_t writeRaw (const void* buffer, uint32_t size) = 0;
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private:
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ByteOrder byteOrder;
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};
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/**
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ByteOrder aware input stream interface
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*/
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class InputStream
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{
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public:
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explicit InputStream (ByteOrder byteOrder = kNativeByteOrder) : byteOrder (byteOrder) {}
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virtual ~InputStream () noexcept = default;
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ByteOrder getByteOrder () const { return byteOrder; }
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void setByteOrder (ByteOrder newByteOrder) { byteOrder = newByteOrder; }
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bool operator>> (int8_t& output);
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bool operator>> (uint8_t& output);
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bool operator>> (int16_t& output);
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bool operator>> (uint16_t& output);
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bool operator>> (int32_t& output);
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bool operator>> (uint32_t& output);
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bool operator>> (int64_t& output);
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bool operator>> (uint64_t& output);
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bool operator>> (double& output);
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virtual bool operator>> (std::string& string) = 0;
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virtual uint32_t readRaw (void* buffer, uint32_t size) = 0;
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private:
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ByteOrder byteOrder;
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};
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/**
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Seekable stream interface
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*/
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class SeekableStream
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{
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public:
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virtual ~SeekableStream () noexcept = default;
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enum SeekMode {
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kSeekSet,
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kSeekCurrent,
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kSeekEnd
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};
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/** returns -1 if seek fails otherwise new position */
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virtual int64_t seek (int64_t pos, SeekMode mode) = 0;
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virtual int64_t tell () const = 0;
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virtual void rewind () = 0;
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};
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/**
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Memory input and output stream
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*/
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class CMemoryStream : virtual public OutputStream, virtual public InputStream, public SeekableStream, public AtomicReferenceCounted
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{
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public:
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CMemoryStream (uint32_t initialSize = 1024, uint32_t delta = 1024, bool binaryMode = true, ByteOrder byteOrder = kNativeByteOrder);
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CMemoryStream (const int8_t* buffer, uint32_t bufferSize, bool binaryMode = true, ByteOrder byteOrder = kNativeByteOrder);
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~CMemoryStream () noexcept override;
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uint32_t writeRaw (const void* buffer, uint32_t size) override;
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uint32_t readRaw (void* buffer, uint32_t size) override;
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int64_t seek (int64_t pos, SeekMode mode) override;
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int64_t tell () const override { return static_cast<int64_t> (pos); }
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void rewind () override { pos = 0; }
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const int8_t* getBuffer () const { return buffer; }
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bool operator<< (const std::string& str) override;
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bool operator>> (std::string& string) override;
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using OutputStream::operator<<;
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using InputStream::operator>>;
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bool end (); // write a zero byte if binaryMode is false
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protected:
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bool resize (uint32_t newSize);
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int8_t* buffer;
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uint32_t bufferSize;
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uint32_t size;
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uint32_t pos;
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uint32_t delta;
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bool binaryMode;
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bool ownsBuffer;
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};
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/**
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File input and output stream
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*/
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class CFileStream : public OutputStream, public InputStream, public SeekableStream, public AtomicReferenceCounted
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{
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public:
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CFileStream ();
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~CFileStream () noexcept override;
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enum {
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kReadMode = 1 << 0,
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kWriteMode = 1 << 1,
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kTruncateMode = 1 << 2,
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kBinaryMode = 1 << 3
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};
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bool open (UTF8StringPtr path, int32_t mode, ByteOrder byteOrder = kNativeByteOrder);
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bool isEndOfFile () const;
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uint32_t writeRaw (const void* buffer, uint32_t size) override;
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uint32_t readRaw (void* buffer, uint32_t size) override;
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int64_t seek (int64_t pos, SeekMode mode) override;
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int64_t tell () const override;
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void rewind () override;
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bool operator<< (const std::string& str) override;
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bool operator>> (std::string& string) override;
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using OutputStream::operator<<;
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using InputStream::operator>>;
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protected:
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FILE* stream;
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int32_t openMode;
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};
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static const int8_t unixPathSeparator = '/';
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static const int8_t windowsPathSeparator = '\\';
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/**
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Helper function to transform all Windows path separators to unix ones
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*/
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inline void unixfyPath (std::string& path)
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{
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std::replace (path.begin (), path.end (), windowsPathSeparator, unixPathSeparator);
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}
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//------------------------------------------------------------------------
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inline bool removeLastPathComponent (std::string& path)
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{
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size_t sepPos = path.find_last_of (unixPathSeparator);
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if (sepPos != std::string::npos)
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{
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path.erase (sepPos);
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return true;
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}
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return false;
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}
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//------------------------------------------------------------------------
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inline Optional<std::string> lastPathComponent (const std::string path)
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{
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size_t sepPos = path.find_last_of (unixPathSeparator);
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if (sepPos == std::string::npos)
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return Optional<std::string> (path);
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return {path.substr (sepPos + 1)};
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}
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//------------------------------------------------------------------------
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inline bool pathIsAbsolute (const std::string& path)
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{
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#if MAC || LINUX
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return !path.empty () && path[0] == unixPathSeparator;
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#elif WINDOWS
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return path.length () >= 2 && path[1] == ':';
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#else
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return false;
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#endif
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}
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/**
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Resource input stream
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*/
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class CResourceInputStream : public InputStream, public SeekableStream
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{
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public:
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explicit CResourceInputStream (ByteOrder byteOrder = kNativeByteOrder);
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~CResourceInputStream () noexcept override;
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bool open (const CResourceDescription& res);
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bool operator>> (std::string& string) override { return false; }
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uint32_t readRaw (void* buffer, uint32_t size) override;
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int64_t seek (int64_t pos, SeekMode mode) override;
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int64_t tell () const override;
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void rewind () override;
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using InputStream::operator>>;
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protected:
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PlatformResourceInputStreamPtr platformStream;
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};
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//------------------------------------------------------------------------
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class BufferedOutputStream : public OutputStream
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{
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public:
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BufferedOutputStream (OutputStream& stream, size_t bufferSize = 8192)
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: stream (stream), bufferSize (bufferSize)
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{
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buffer.reserve (bufferSize);
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}
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~BufferedOutputStream () noexcept override { flush (); }
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bool operator<< (const std::string& str) override
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{
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return writeRaw (str.c_str (), static_cast<uint32_t> (str.size ())) == str.size ();
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}
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uint32_t writeRaw (const void* inBuffer, uint32_t size) override
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{
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auto written = size;
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const uint8_t* ptr = reinterpret_cast<const uint8_t*> (inBuffer);
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while (size)
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{
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auto toWrite = 1;
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buffer.emplace_back (*ptr);
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if (buffer.size () == bufferSize)
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{
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if (!flush ())
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return kStreamIOError;
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}
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size -= toWrite;
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ptr += toWrite;
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}
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return written;
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}
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bool flush ()
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{
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if (buffer.empty ())
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return true;
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auto result = stream.writeRaw (buffer.data (), static_cast<uint32_t> (buffer.size ())) ==
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buffer.size ();
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buffer.clear ();
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return result;
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}
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private:
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OutputStream& stream;
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std::vector<uint8_t> buffer;
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size_t bufferSize;
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};
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//------------------------------------------------------------------------
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class StdOutStream : public OutputStream
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{
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public:
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StdOutStream () {}
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uint32_t writeRaw (const void* buffer, uint32_t size) override
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{
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auto byteBuffer = reinterpret_cast<const uint8_t*>(buffer);
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for (auto i = 0u; i < size; ++i, ++byteBuffer)
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{
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std::cout << *byteBuffer;
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}
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return size;
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}
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bool operator<< (const std::string& str) override
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{
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std::cout << str;
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return true;
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}
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};
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//------------------------------------------------------------------------
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} // VSTGUI
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