From 53e22b11857fed62e2313d6d84d90f88ed412ffb Mon Sep 17 00:00:00 2001 From: Alexander Harkness Date: Mon, 29 Jul 2013 12:13:03 +0100 Subject: Changed everyting to Unix line endings. --- source/ByteBuffer.cpp | 1322 ++++++++++++++++++++++++------------------------- 1 file changed, 661 insertions(+), 661 deletions(-) (limited to 'source/ByteBuffer.cpp') diff --git a/source/ByteBuffer.cpp b/source/ByteBuffer.cpp index 6d630068a..c82951271 100644 --- a/source/ByteBuffer.cpp +++ b/source/ByteBuffer.cpp @@ -1,661 +1,661 @@ - -// ByteBuffer.cpp - -// Implements the cByteBuffer class representing a ringbuffer of bytes - -#include "Globals.h" - -#include "ByteBuffer.h" -#include "Endianness.h" -#include "OSSupport/IsThread.h" - - - - - -#define NEEDBYTES(Num) if (!CanReadBytes(Num)) return false; -#define PUTBYTES(Num) if (!CanWriteBytes(Num)) return false; - - - - - -#ifdef _DEBUG - -/// Simple RAII class that uses one internal unsigned long for checking if two threads are using an object simultanously -class cSingleThreadAccessChecker -{ -public: - cSingleThreadAccessChecker(unsigned long * a_ThreadID) : - m_ThreadID(a_ThreadID) - { - ASSERT((*a_ThreadID == 0) || (*a_ThreadID == cIsThread::GetCurrentID())); - } - - ~cSingleThreadAccessChecker() - { - *m_ThreadID = 0; - } - -protected: - unsigned long * m_ThreadID; -} ; - -#define CHECK_THREAD cSingleThreadAccessChecker Checker(const_cast(&m_ThreadID)) - -#else - #define CHECK_THREAD -#endif - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// cByteBuffer: - -cByteBuffer::cByteBuffer(int a_BufferSize) : - m_Buffer(new char[a_BufferSize + 1]), - m_BufferSize(a_BufferSize + 1), - #ifdef _DEBUG - m_ThreadID(0), - #endif // _DEBUG - m_DataStart(0), - m_WritePos(0), - m_ReadPos(0) -{ - // Allocating one byte more than the buffer size requested, so that we can distinguish between - // completely-full and completely-empty states -} - - - - - -cByteBuffer::~cByteBuffer() -{ - CheckValid(); - delete[] m_Buffer; -} - - - - - -bool cByteBuffer::Write(const char * a_Bytes, int a_Count) -{ - CHECK_THREAD; - CheckValid(); - - // Store the current free space for a check after writing: - int CurFreeSpace = GetFreeSpace(); - int CurReadableSpace = GetReadableSpace(); - int WrittenBytes = 0; - - if (GetFreeSpace() < a_Count) - { - return false; - } - int TillEnd = m_BufferSize - m_WritePos; - if (TillEnd <= a_Count) - { - // Need to wrap around the ringbuffer end - if (TillEnd > 0) - { - memcpy(m_Buffer + m_WritePos, a_Bytes, TillEnd); - a_Bytes += TillEnd; - a_Count -= TillEnd; - WrittenBytes = TillEnd; - } - m_WritePos = 0; - } - - // We're guaranteed that we'll fit in a single write op - if (a_Count > 0) - { - memcpy(m_Buffer + m_WritePos, a_Bytes, a_Count); - m_WritePos += a_Count; - WrittenBytes += a_Count; - } - - ASSERT(GetFreeSpace() == CurFreeSpace - WrittenBytes); - ASSERT(GetReadableSpace() == CurReadableSpace + WrittenBytes); - return true; -} - - - - - -int cByteBuffer::GetFreeSpace(void) const -{ - CHECK_THREAD; - CheckValid(); - if (m_WritePos >= m_DataStart) - { - // Wrap around the buffer end: - return m_BufferSize - m_WritePos + m_DataStart - 1; - } - // Single free space partition: - return m_DataStart - m_WritePos - 1; -} - - - - - -/// Returns the number of bytes that are currently in the ringbuffer. Note GetReadableBytes() -int cByteBuffer::GetUsedSpace(void) const -{ - CHECK_THREAD; - CheckValid(); - return m_BufferSize - GetFreeSpace(); -} - - - - - -/// Returns the number of bytes that are currently available for reading (may be less than UsedSpace due to some data having been read already) -int cByteBuffer::GetReadableSpace(void) const -{ - CHECK_THREAD; - CheckValid(); - if (m_ReadPos > m_WritePos) - { - // Wrap around the buffer end: - return m_BufferSize - m_ReadPos + m_WritePos; - } - // Single readable space partition: - return m_WritePos - m_ReadPos ; -} - - - - - -bool cByteBuffer::CanReadBytes(int a_Count) const -{ - CHECK_THREAD; - CheckValid(); - return (a_Count <= GetReadableSpace()); -} - - - - - -bool cByteBuffer::CanWriteBytes(int a_Count) const -{ - CHECK_THREAD; - CheckValid(); - return (a_Count <= GetFreeSpace()); -} - - - - - -bool cByteBuffer::ReadChar(char & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(1); - ReadBuf(&a_Value, 1); - return true; -} - - - - - -bool cByteBuffer::ReadByte(unsigned char & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(1); - ReadBuf(&a_Value, 1); - return true; -} - - - - - -bool cByteBuffer::ReadBEShort(short & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(2); - ReadBuf(&a_Value, 2); - a_Value = ntohs(a_Value); - return true; -} - - - - - -bool cByteBuffer::ReadBEInt(int & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(4); - ReadBuf(&a_Value, 4); - a_Value = ntohl(a_Value); - return true; -} - - - - - -bool cByteBuffer::ReadBEInt64(Int64 & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(8); - ReadBuf(&a_Value, 8); - a_Value = NetworkToHostLong8(&a_Value); - return true; -} - - - - - -bool cByteBuffer::ReadBEFloat(float & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(4); - ReadBuf(&a_Value, 4); - a_Value = NetworkToHostFloat4(&a_Value); - return true; -} - - - - - -bool cByteBuffer::ReadBEDouble(double & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(8); - ReadBuf(&a_Value, 8); - a_Value = NetworkToHostDouble8(&a_Value); - return true; -} - - - - - -bool cByteBuffer::ReadBool(bool & a_Value) -{ - CHECK_THREAD; - CheckValid(); - NEEDBYTES(1); - char Value = 0; - ReadBuf(&Value, 1); - a_Value = (Value != 0); - return true; -} - - - - - -bool cByteBuffer::ReadBEUTF16String16(AString & a_Value) -{ - CHECK_THREAD; - CheckValid(); - short Length; - if (!ReadBEShort(Length)) - { - return false; - } - if (Length < 0) - { - ASSERT(!"Negative string length? Are you sure?"); - return true; - } - return ReadUTF16String(a_Value, Length); -} - - - - - -bool cByteBuffer::WriteChar(char a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(1); - return WriteBuf(&a_Value, 1); -} - - - - - -bool cByteBuffer::WriteByte(unsigned char a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(1); - return WriteBuf(&a_Value, 1); -} - - - - - -bool cByteBuffer::WriteBEShort(short a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(2); - short Converted = htons(a_Value); - return WriteBuf(&Converted, 2); -} - - - - - -bool cByteBuffer::WriteBEInt(int a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(4); - int Converted = HostToNetwork4(&a_Value); - return WriteBuf(&Converted, 4); -} - - - - - -bool cByteBuffer::WriteBEInt64(Int64 a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(8); - Int64 Converted = HostToNetwork8(&a_Value); - return WriteBuf(&Converted, 8); -} - - - - - -bool cByteBuffer::WriteBEFloat(float a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(4); - int Converted = HostToNetwork4(&a_Value); - return WriteBuf(&Converted, 4); -} - - - - - -bool cByteBuffer::WriteBEDouble(double a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(8); - Int64 Converted = HostToNetwork8(&a_Value); - return WriteBuf(&Converted, 8); -} - - - - - - -bool cByteBuffer::WriteBool(bool a_Value) -{ - CHECK_THREAD; - CheckValid(); - return WriteChar(a_Value ? 1 : 0); -} - - - - - -bool cByteBuffer::WriteBEUTF16String16(const AString & a_Value) -{ - CHECK_THREAD; - CheckValid(); - PUTBYTES(2); - AString UTF16BE; - UTF8ToRawBEUTF16(a_Value.data(), a_Value.size(), UTF16BE); - WriteBEShort((short)(UTF16BE.size() / 2)); - PUTBYTES(UTF16BE.size()); - WriteBuf(UTF16BE.data(), UTF16BE.size()); - return true; -} - - - - - -bool cByteBuffer::ReadBuf(void * a_Buffer, int a_Count) -{ - CHECK_THREAD; - CheckValid(); - ASSERT(a_Count >= 0); - NEEDBYTES(a_Count); - char * Dst = (char *)a_Buffer; // So that we can do byte math - int BytesToEndOfBuffer = m_BufferSize - m_ReadPos; - ASSERT(BytesToEndOfBuffer >= 0); // Sanity check - if (BytesToEndOfBuffer <= a_Count) - { - // Reading across the ringbuffer end, read the first part and adjust parameters: - if (BytesToEndOfBuffer > 0) - { - memcpy(Dst, m_Buffer + m_ReadPos, BytesToEndOfBuffer); - Dst += BytesToEndOfBuffer; - a_Count -= BytesToEndOfBuffer; - } - m_ReadPos = 0; - } - - // Read the rest of the bytes in a single read (guaranteed to fit): - if (a_Count > 0) - { - memcpy(Dst, m_Buffer + m_ReadPos, a_Count); - m_ReadPos += a_Count; - } - return true; -} - - - - - -bool cByteBuffer::WriteBuf(const void * a_Buffer, int a_Count) -{ - CHECK_THREAD; - CheckValid(); - ASSERT(a_Count >= 0); - PUTBYTES(a_Count); - char * Src = (char *)a_Buffer; // So that we can do byte math - int BytesToEndOfBuffer = m_BufferSize - m_WritePos; - if (BytesToEndOfBuffer <= a_Count) - { - // Reading across the ringbuffer end, read the first part and adjust parameters: - memcpy(m_Buffer + m_WritePos, Src, BytesToEndOfBuffer); - Src += BytesToEndOfBuffer; - a_Count -= BytesToEndOfBuffer; - m_WritePos = 0; - } - - // Read the rest of the bytes in a single read (guaranteed to fit): - if (a_Count > 0) - { - memcpy(m_Buffer + m_WritePos, Src, a_Count); - m_WritePos += a_Count; - } - return true; -} - - - - - -bool cByteBuffer::ReadString(AString & a_String, int a_Count) -{ - CHECK_THREAD; - CheckValid(); - ASSERT(a_Count >= 0); - NEEDBYTES(a_Count); - a_String.clear(); - a_String.reserve(a_Count); - int BytesToEndOfBuffer = m_BufferSize - m_ReadPos; - ASSERT(BytesToEndOfBuffer >= 0); // Sanity check - if (BytesToEndOfBuffer <= a_Count) - { - // Reading across the ringbuffer end, read the first part and adjust parameters: - if (BytesToEndOfBuffer > 0) - { - a_String.assign(m_Buffer + m_ReadPos, BytesToEndOfBuffer); - a_Count -= BytesToEndOfBuffer; - } - m_ReadPos = 0; - } - - // Read the rest of the bytes in a single read (guaranteed to fit): - if (a_Count > 0) - { - a_String.append(m_Buffer + m_ReadPos, a_Count); - m_ReadPos += a_Count; - } - return true; -} - - - - - -bool cByteBuffer::ReadUTF16String(AString & a_String, int a_NumChars) -{ - // Reads 2 * a_NumChars bytes and interprets it as a UTF16 string, converting it into UTF8 string a_String - CHECK_THREAD; - CheckValid(); - ASSERT(a_NumChars >= 0); - AString RawData; - if (!ReadString(RawData, a_NumChars * 2)) - { - return false; - } - RawBEToUTF8((short *)(RawData.data()), a_NumChars, a_String); - return true; -} - - - - - -bool cByteBuffer::SkipRead(int a_Count) -{ - CHECK_THREAD; - CheckValid(); - ASSERT(a_Count >= 0); - if (!CanReadBytes(a_Count)) - { - return false; - } - AdvanceReadPos(a_Count); - return true; -} - - - - - -void cByteBuffer::ReadAll(AString & a_Data) -{ - CHECK_THREAD; - CheckValid(); - ReadString(a_Data, GetReadableSpace()); -} - - - - - -void cByteBuffer::CommitRead(void) -{ - CHECK_THREAD; - CheckValid(); - m_DataStart = m_ReadPos; -} - - - - - -void cByteBuffer::ResetRead(void) -{ - CHECK_THREAD; - CheckValid(); - m_ReadPos = m_DataStart; -} - - - - - -void cByteBuffer::ReadAgain(AString & a_Out) -{ - // Return the data between m_DataStart and m_ReadPos (the data that has been read but not committed) - // Used by ProtoProxy to repeat communication twice, once for parsing and the other time for the remote party - CHECK_THREAD; - CheckValid(); - int DataStart = m_DataStart; - if (m_ReadPos < m_DataStart) - { - // Across the ringbuffer end, read the first part and adjust next part's start: - a_Out.append(m_Buffer + m_DataStart, m_BufferSize - m_DataStart); - DataStart = 0; - } - a_Out.append(m_Buffer + DataStart, m_ReadPos - DataStart); -} - - - - - -void cByteBuffer::AdvanceReadPos(int a_Count) -{ - CHECK_THREAD; - CheckValid(); - m_ReadPos += a_Count; - if (m_ReadPos > m_BufferSize) - { - m_ReadPos -= m_BufferSize; - } -} - - - - - -void cByteBuffer::CheckValid(void) const -{ - ASSERT(m_ReadPos >= 0); - ASSERT(m_ReadPos < m_BufferSize); - ASSERT(m_WritePos >= 0); - ASSERT(m_WritePos < m_BufferSize); -} - - - - + +// ByteBuffer.cpp + +// Implements the cByteBuffer class representing a ringbuffer of bytes + +#include "Globals.h" + +#include "ByteBuffer.h" +#include "Endianness.h" +#include "OSSupport/IsThread.h" + + + + + +#define NEEDBYTES(Num) if (!CanReadBytes(Num)) return false; +#define PUTBYTES(Num) if (!CanWriteBytes(Num)) return false; + + + + + +#ifdef _DEBUG + +/// Simple RAII class that uses one internal unsigned long for checking if two threads are using an object simultanously +class cSingleThreadAccessChecker +{ +public: + cSingleThreadAccessChecker(unsigned long * a_ThreadID) : + m_ThreadID(a_ThreadID) + { + ASSERT((*a_ThreadID == 0) || (*a_ThreadID == cIsThread::GetCurrentID())); + } + + ~cSingleThreadAccessChecker() + { + *m_ThreadID = 0; + } + +protected: + unsigned long * m_ThreadID; +} ; + +#define CHECK_THREAD cSingleThreadAccessChecker Checker(const_cast(&m_ThreadID)) + +#else + #define CHECK_THREAD +#endif + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cByteBuffer: + +cByteBuffer::cByteBuffer(int a_BufferSize) : + m_Buffer(new char[a_BufferSize + 1]), + m_BufferSize(a_BufferSize + 1), + #ifdef _DEBUG + m_ThreadID(0), + #endif // _DEBUG + m_DataStart(0), + m_WritePos(0), + m_ReadPos(0) +{ + // Allocating one byte more than the buffer size requested, so that we can distinguish between + // completely-full and completely-empty states +} + + + + + +cByteBuffer::~cByteBuffer() +{ + CheckValid(); + delete[] m_Buffer; +} + + + + + +bool cByteBuffer::Write(const char * a_Bytes, int a_Count) +{ + CHECK_THREAD; + CheckValid(); + + // Store the current free space for a check after writing: + int CurFreeSpace = GetFreeSpace(); + int CurReadableSpace = GetReadableSpace(); + int WrittenBytes = 0; + + if (GetFreeSpace() < a_Count) + { + return false; + } + int TillEnd = m_BufferSize - m_WritePos; + if (TillEnd <= a_Count) + { + // Need to wrap around the ringbuffer end + if (TillEnd > 0) + { + memcpy(m_Buffer + m_WritePos, a_Bytes, TillEnd); + a_Bytes += TillEnd; + a_Count -= TillEnd; + WrittenBytes = TillEnd; + } + m_WritePos = 0; + } + + // We're guaranteed that we'll fit in a single write op + if (a_Count > 0) + { + memcpy(m_Buffer + m_WritePos, a_Bytes, a_Count); + m_WritePos += a_Count; + WrittenBytes += a_Count; + } + + ASSERT(GetFreeSpace() == CurFreeSpace - WrittenBytes); + ASSERT(GetReadableSpace() == CurReadableSpace + WrittenBytes); + return true; +} + + + + + +int cByteBuffer::GetFreeSpace(void) const +{ + CHECK_THREAD; + CheckValid(); + if (m_WritePos >= m_DataStart) + { + // Wrap around the buffer end: + return m_BufferSize - m_WritePos + m_DataStart - 1; + } + // Single free space partition: + return m_DataStart - m_WritePos - 1; +} + + + + + +/// Returns the number of bytes that are currently in the ringbuffer. Note GetReadableBytes() +int cByteBuffer::GetUsedSpace(void) const +{ + CHECK_THREAD; + CheckValid(); + return m_BufferSize - GetFreeSpace(); +} + + + + + +/// Returns the number of bytes that are currently available for reading (may be less than UsedSpace due to some data having been read already) +int cByteBuffer::GetReadableSpace(void) const +{ + CHECK_THREAD; + CheckValid(); + if (m_ReadPos > m_WritePos) + { + // Wrap around the buffer end: + return m_BufferSize - m_ReadPos + m_WritePos; + } + // Single readable space partition: + return m_WritePos - m_ReadPos ; +} + + + + + +bool cByteBuffer::CanReadBytes(int a_Count) const +{ + CHECK_THREAD; + CheckValid(); + return (a_Count <= GetReadableSpace()); +} + + + + + +bool cByteBuffer::CanWriteBytes(int a_Count) const +{ + CHECK_THREAD; + CheckValid(); + return (a_Count <= GetFreeSpace()); +} + + + + + +bool cByteBuffer::ReadChar(char & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(1); + ReadBuf(&a_Value, 1); + return true; +} + + + + + +bool cByteBuffer::ReadByte(unsigned char & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(1); + ReadBuf(&a_Value, 1); + return true; +} + + + + + +bool cByteBuffer::ReadBEShort(short & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(2); + ReadBuf(&a_Value, 2); + a_Value = ntohs(a_Value); + return true; +} + + + + + +bool cByteBuffer::ReadBEInt(int & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(4); + ReadBuf(&a_Value, 4); + a_Value = ntohl(a_Value); + return true; +} + + + + + +bool cByteBuffer::ReadBEInt64(Int64 & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(8); + ReadBuf(&a_Value, 8); + a_Value = NetworkToHostLong8(&a_Value); + return true; +} + + + + + +bool cByteBuffer::ReadBEFloat(float & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(4); + ReadBuf(&a_Value, 4); + a_Value = NetworkToHostFloat4(&a_Value); + return true; +} + + + + + +bool cByteBuffer::ReadBEDouble(double & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(8); + ReadBuf(&a_Value, 8); + a_Value = NetworkToHostDouble8(&a_Value); + return true; +} + + + + + +bool cByteBuffer::ReadBool(bool & a_Value) +{ + CHECK_THREAD; + CheckValid(); + NEEDBYTES(1); + char Value = 0; + ReadBuf(&Value, 1); + a_Value = (Value != 0); + return true; +} + + + + + +bool cByteBuffer::ReadBEUTF16String16(AString & a_Value) +{ + CHECK_THREAD; + CheckValid(); + short Length; + if (!ReadBEShort(Length)) + { + return false; + } + if (Length < 0) + { + ASSERT(!"Negative string length? Are you sure?"); + return true; + } + return ReadUTF16String(a_Value, Length); +} + + + + + +bool cByteBuffer::WriteChar(char a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(1); + return WriteBuf(&a_Value, 1); +} + + + + + +bool cByteBuffer::WriteByte(unsigned char a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(1); + return WriteBuf(&a_Value, 1); +} + + + + + +bool cByteBuffer::WriteBEShort(short a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(2); + short Converted = htons(a_Value); + return WriteBuf(&Converted, 2); +} + + + + + +bool cByteBuffer::WriteBEInt(int a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(4); + int Converted = HostToNetwork4(&a_Value); + return WriteBuf(&Converted, 4); +} + + + + + +bool cByteBuffer::WriteBEInt64(Int64 a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(8); + Int64 Converted = HostToNetwork8(&a_Value); + return WriteBuf(&Converted, 8); +} + + + + + +bool cByteBuffer::WriteBEFloat(float a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(4); + int Converted = HostToNetwork4(&a_Value); + return WriteBuf(&Converted, 4); +} + + + + + +bool cByteBuffer::WriteBEDouble(double a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(8); + Int64 Converted = HostToNetwork8(&a_Value); + return WriteBuf(&Converted, 8); +} + + + + + + +bool cByteBuffer::WriteBool(bool a_Value) +{ + CHECK_THREAD; + CheckValid(); + return WriteChar(a_Value ? 1 : 0); +} + + + + + +bool cByteBuffer::WriteBEUTF16String16(const AString & a_Value) +{ + CHECK_THREAD; + CheckValid(); + PUTBYTES(2); + AString UTF16BE; + UTF8ToRawBEUTF16(a_Value.data(), a_Value.size(), UTF16BE); + WriteBEShort((short)(UTF16BE.size() / 2)); + PUTBYTES(UTF16BE.size()); + WriteBuf(UTF16BE.data(), UTF16BE.size()); + return true; +} + + + + + +bool cByteBuffer::ReadBuf(void * a_Buffer, int a_Count) +{ + CHECK_THREAD; + CheckValid(); + ASSERT(a_Count >= 0); + NEEDBYTES(a_Count); + char * Dst = (char *)a_Buffer; // So that we can do byte math + int BytesToEndOfBuffer = m_BufferSize - m_ReadPos; + ASSERT(BytesToEndOfBuffer >= 0); // Sanity check + if (BytesToEndOfBuffer <= a_Count) + { + // Reading across the ringbuffer end, read the first part and adjust parameters: + if (BytesToEndOfBuffer > 0) + { + memcpy(Dst, m_Buffer + m_ReadPos, BytesToEndOfBuffer); + Dst += BytesToEndOfBuffer; + a_Count -= BytesToEndOfBuffer; + } + m_ReadPos = 0; + } + + // Read the rest of the bytes in a single read (guaranteed to fit): + if (a_Count > 0) + { + memcpy(Dst, m_Buffer + m_ReadPos, a_Count); + m_ReadPos += a_Count; + } + return true; +} + + + + + +bool cByteBuffer::WriteBuf(const void * a_Buffer, int a_Count) +{ + CHECK_THREAD; + CheckValid(); + ASSERT(a_Count >= 0); + PUTBYTES(a_Count); + char * Src = (char *)a_Buffer; // So that we can do byte math + int BytesToEndOfBuffer = m_BufferSize - m_WritePos; + if (BytesToEndOfBuffer <= a_Count) + { + // Reading across the ringbuffer end, read the first part and adjust parameters: + memcpy(m_Buffer + m_WritePos, Src, BytesToEndOfBuffer); + Src += BytesToEndOfBuffer; + a_Count -= BytesToEndOfBuffer; + m_WritePos = 0; + } + + // Read the rest of the bytes in a single read (guaranteed to fit): + if (a_Count > 0) + { + memcpy(m_Buffer + m_WritePos, Src, a_Count); + m_WritePos += a_Count; + } + return true; +} + + + + + +bool cByteBuffer::ReadString(AString & a_String, int a_Count) +{ + CHECK_THREAD; + CheckValid(); + ASSERT(a_Count >= 0); + NEEDBYTES(a_Count); + a_String.clear(); + a_String.reserve(a_Count); + int BytesToEndOfBuffer = m_BufferSize - m_ReadPos; + ASSERT(BytesToEndOfBuffer >= 0); // Sanity check + if (BytesToEndOfBuffer <= a_Count) + { + // Reading across the ringbuffer end, read the first part and adjust parameters: + if (BytesToEndOfBuffer > 0) + { + a_String.assign(m_Buffer + m_ReadPos, BytesToEndOfBuffer); + a_Count -= BytesToEndOfBuffer; + } + m_ReadPos = 0; + } + + // Read the rest of the bytes in a single read (guaranteed to fit): + if (a_Count > 0) + { + a_String.append(m_Buffer + m_ReadPos, a_Count); + m_ReadPos += a_Count; + } + return true; +} + + + + + +bool cByteBuffer::ReadUTF16String(AString & a_String, int a_NumChars) +{ + // Reads 2 * a_NumChars bytes and interprets it as a UTF16 string, converting it into UTF8 string a_String + CHECK_THREAD; + CheckValid(); + ASSERT(a_NumChars >= 0); + AString RawData; + if (!ReadString(RawData, a_NumChars * 2)) + { + return false; + } + RawBEToUTF8((short *)(RawData.data()), a_NumChars, a_String); + return true; +} + + + + + +bool cByteBuffer::SkipRead(int a_Count) +{ + CHECK_THREAD; + CheckValid(); + ASSERT(a_Count >= 0); + if (!CanReadBytes(a_Count)) + { + return false; + } + AdvanceReadPos(a_Count); + return true; +} + + + + + +void cByteBuffer::ReadAll(AString & a_Data) +{ + CHECK_THREAD; + CheckValid(); + ReadString(a_Data, GetReadableSpace()); +} + + + + + +void cByteBuffer::CommitRead(void) +{ + CHECK_THREAD; + CheckValid(); + m_DataStart = m_ReadPos; +} + + + + + +void cByteBuffer::ResetRead(void) +{ + CHECK_THREAD; + CheckValid(); + m_ReadPos = m_DataStart; +} + + + + + +void cByteBuffer::ReadAgain(AString & a_Out) +{ + // Return the data between m_DataStart and m_ReadPos (the data that has been read but not committed) + // Used by ProtoProxy to repeat communication twice, once for parsing and the other time for the remote party + CHECK_THREAD; + CheckValid(); + int DataStart = m_DataStart; + if (m_ReadPos < m_DataStart) + { + // Across the ringbuffer end, read the first part and adjust next part's start: + a_Out.append(m_Buffer + m_DataStart, m_BufferSize - m_DataStart); + DataStart = 0; + } + a_Out.append(m_Buffer + DataStart, m_ReadPos - DataStart); +} + + + + + +void cByteBuffer::AdvanceReadPos(int a_Count) +{ + CHECK_THREAD; + CheckValid(); + m_ReadPos += a_Count; + if (m_ReadPos > m_BufferSize) + { + m_ReadPos -= m_BufferSize; + } +} + + + + + +void cByteBuffer::CheckValid(void) const +{ + ASSERT(m_ReadPos >= 0); + ASSERT(m_ReadPos < m_BufferSize); + ASSERT(m_WritePos >= 0); + ASSERT(m_WritePos < m_BufferSize); +} + + + + -- cgit v1.2.3