summaryrefslogtreecommitdiffstats
path: root/source/ByteBuffer.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'source/ByteBuffer.cpp')
-rw-r--r--source/ByteBuffer.cpp787
1 files changed, 0 insertions, 787 deletions
diff --git a/source/ByteBuffer.cpp b/source/ByteBuffer.cpp
deleted file mode 100644
index 1cdd2f430..000000000
--- a/source/ByteBuffer.cpp
+++ /dev/null
@@ -1,787 +0,0 @@
-
-// ByteBuffer.cpp
-
-// Implements the cByteBuffer class representing a ringbuffer of bytes
-
-#include "Globals.h"
-
-#include "ByteBuffer.h"
-#include "Endianness.h"
-#include "OSSupport/IsThread.h"
-
-
-
-
-
-// If a string sent over the protocol is larger than this, a warning is emitted to the console
-#define MAX_STRING_SIZE (512 KiB)
-
-#define NEEDBYTES(Num) if (!CanReadBytes(Num)) return false; // Check if at least Num bytes can be read from the buffer, return false if not
-#define PUTBYTES(Num) if (!CanWriteBytes(Num)) return false; // Check if at least Num bytes can be written to the buffer, return false if not
-
-
-
-
-
-#if 0
-
-/// Self-test of the VarInt-reading and writing code
-class cByteBufferSelfTest
-{
-public:
- cByteBufferSelfTest(void)
- {
- TestRead();
- TestWrite();
- }
-
- void TestRead(void)
- {
- cByteBuffer buf(50);
- buf.Write("\x05\xac\x02\x00", 4);
- UInt32 v1;
- ASSERT(buf.ReadVarInt(v1) && (v1 == 5));
- UInt32 v2;
- ASSERT(buf.ReadVarInt(v2) && (v2 == 300));
- UInt32 v3;
- ASSERT(buf.ReadVarInt(v3) && (v3 == 0));
- }
-
- void TestWrite(void)
- {
- cByteBuffer buf(50);
- buf.WriteVarInt(5);
- buf.WriteVarInt(300);
- buf.WriteVarInt(0);
- AString All;
- buf.ReadAll(All);
- ASSERT(All.size() == 4);
- ASSERT(memcmp(All.data(), "\x05\xac\x02\x00", All.size()) == 0);
- }
-} g_ByteBufferTest;
-
-#endif
-
-
-
-
-
-#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<unsigned long *>(&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() - 1;
-}
-
-
-
-
-
-/// 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::ReadVarInt(UInt32 & a_Value)
-{
- CHECK_THREAD;
- CheckValid();
- UInt32 Value = 0;
- int Shift = 0;
- unsigned char b = 0;
- do
- {
- NEEDBYTES(1);
- ReadBuf(&b, 1);
- Value = Value | (((Int64)(b & 0x7f)) << Shift);
- Shift += 7;
- } while ((b & 0x80) != 0);
- a_Value = Value;
- return true;
-}
-
-
-
-
-
-bool cByteBuffer::ReadVarUTF8String(AString & a_Value)
-{
- CHECK_THREAD;
- CheckValid();
- UInt32 Size = 0;
- if (!ReadVarInt(Size))
- {
- return false;
- }
- if (Size > MAX_STRING_SIZE)
- {
- LOGWARNING("%s: String too large: %llu (%llu KiB)", __FUNCTION__, Size, Size / 1024);
- }
- return ReadString(a_Value, (int)Size);
-}
-
-
-
-
-
-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::WriteVarInt(UInt32 a_Value)
-{
- CHECK_THREAD;
- CheckValid();
-
- // A 32-bit integer can be encoded by at most 5 bytes:
- unsigned char b[5];
- int idx = 0;
- do
- {
- b[idx] = (a_Value & 0x7f) | ((a_Value > 0x7f) ? 0x80 : 0x00);
- a_Value = a_Value >> 7;
- idx++;
- } while (a_Value > 0);
-
- return WriteBuf(b, idx);
-}
-
-
-
-
-bool cByteBuffer::WriteVarUTF8String(const AString & a_Value)
-{
- CHECK_THREAD;
- CheckValid();
- PUTBYTES(a_Value.size() + 1); // This is a lower-bound on the bytes that will be actually written. Fail early.
- bool res = WriteVarInt(a_Value.size());
- if (!res)
- {
- return false;
- }
- return WriteBuf(a_Value.data(), a_Value.size());
-}
-
-
-
-
-
-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);
-}
-
-
-
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 05:54:20 +0100