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/**
* @file lldatapacker.h
* @brief Data packer declaration for tightly storing binary data.
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLDATAPACKER_H
#define LL_LLDATAPACKER_H
class LLColor4;
class LLColor4U;
class LLVector2;
class LLVector3;
class LLVector4;
class LLUUID;
class LLDataPacker
{
public:
virtual ~LLDataPacker() {}
// Not required to override, but error to call?
virtual void reset();
virtual void dumpBufferToLog();
virtual bool hasNext() const = 0;
virtual bool packString(const std::string& value, const char *name) = 0;
virtual bool unpackString(std::string& value, const char *name) = 0;
virtual bool packBinaryData(const U8 *value, S32 size, const char *name) = 0;
virtual bool unpackBinaryData(U8 *value, S32 &size, const char *name) = 0;
// Constant size binary data packing
virtual bool packBinaryDataFixed(const U8 *value, S32 size, const char *name) = 0;
virtual bool unpackBinaryDataFixed(U8 *value, S32 size, const char *name) = 0;
virtual bool packU8(const U8 value, const char *name) = 0;
virtual bool unpackU8(U8 &value, const char *name) = 0;
virtual bool packU16(const U16 value, const char *name) = 0;
virtual bool unpackU16(U16 &value, const char *name) = 0;
bool unpackU16s(U16 *value, S32 count, const char *name);
virtual bool packS16(const S16 value, const char *name) = 0;
virtual bool unpackS16(S16 &value, const char *name) = 0;
bool unpackS16s(S16 *value, S32 count, const char *name);
virtual bool packU32(const U32 value, const char *name) = 0;
virtual bool unpackU32(U32 &value, const char *name) = 0;
virtual bool packS32(const S32 value, const char *name) = 0;
virtual bool unpackS32(S32 &value, const char *name) = 0;
virtual bool packF32(const F32 value, const char *name) = 0;
virtual bool unpackF32(F32 &value, const char *name) = 0;
bool unpackF32s(F32 *values, S32 count, const char *name);
// Packs a float into an integer, using the given size
// and picks the right U* data type to pack into.
bool packFixed(const F32 value, const char *name,
const bool is_signed, const U32 int_bits, const U32 frac_bits);
bool unpackFixed(F32 &value, const char *name,
const bool is_signed, const U32 int_bits, const U32 frac_bits);
virtual bool packColor4(const LLColor4 &value, const char *name) = 0;
virtual bool unpackColor4(LLColor4 &value, const char *name) = 0;
virtual bool packColor4U(const LLColor4U &value, const char *name) = 0;
virtual bool unpackColor4U(LLColor4U &value, const char *name) = 0;
bool unpackColor4Us(LLColor4U *values, S32 count, const char *name);
virtual bool packVector2(const LLVector2 &value, const char *name) = 0;
virtual bool unpackVector2(LLVector2 &value, const char *name) = 0;
virtual bool packVector3(const LLVector3 &value, const char *name) = 0;
virtual bool unpackVector3(LLVector3 &value, const char *name) = 0;
virtual bool packVector4(const LLVector4 &value, const char *name) = 0;
virtual bool unpackVector4(LLVector4 &value, const char *name) = 0;
virtual bool packUUID(const LLUUID &value, const char *name) = 0;
virtual bool unpackUUID(LLUUID &value, const char *name) = 0;
bool unpackUUIDs(LLUUID *values, S32 count, const char *name);
U32 getPassFlags() const { return mPassFlags; }
void setPassFlags(U32 flags) { mPassFlags = flags; }
protected:
LLDataPacker();
protected:
U32 mPassFlags;
bool mWriteEnabled; // disable this to do things like determine filesize without actually copying data
};
class LLDataPackerBinaryBuffer : public LLDataPacker
{
public:
LLDataPackerBinaryBuffer(U8 *bufferp, S32 size)
: LLDataPacker(),
mBufferp(bufferp),
mCurBufferp(bufferp),
mBufferSize(size)
{
mWriteEnabled = true;
}
LLDataPackerBinaryBuffer()
: LLDataPacker(),
mBufferp(NULL),
mCurBufferp(NULL),
mBufferSize(0)
{
}
/*virtual*/ bool packString(const std::string& value, const char *name);
/*virtual*/ bool unpackString(std::string& value, const char *name);
/*virtual*/ bool packBinaryData(const U8 *value, S32 size, const char *name);
/*virtual*/ bool unpackBinaryData(U8 *value, S32 &size, const char *name);
// Constant size binary data packing
/*virtual*/ bool packBinaryDataFixed(const U8 *value, S32 size, const char *name);
/*virtual*/ bool unpackBinaryDataFixed(U8 *value, S32 size, const char *name);
/*virtual*/ bool packU8(const U8 value, const char *name);
/*virtual*/ bool unpackU8(U8 &value, const char *name);
/*virtual*/ bool packU16(const U16 value, const char *name);
/*virtual*/ bool unpackU16(U16 &value, const char *name);
/*virtual*/ bool packS16(const S16 value, const char *name);
/*virtual*/ bool unpackS16(S16 &value, const char *name);
/*virtual*/ bool packU32(const U32 value, const char *name);
/*virtual*/ bool unpackU32(U32 &value, const char *name);
/*virtual*/ bool packS32(const S32 value, const char *name);
/*virtual*/ bool unpackS32(S32 &value, const char *name);
/*virtual*/ bool packF32(const F32 value, const char *name);
/*virtual*/ bool unpackF32(F32 &value, const char *name);
/*virtual*/ bool packColor4(const LLColor4 &value, const char *name);
/*virtual*/ bool unpackColor4(LLColor4 &value, const char *name);
/*virtual*/ bool packColor4U(const LLColor4U &value, const char *name);
/*virtual*/ bool unpackColor4U(LLColor4U &value, const char *name);
/*virtual*/ bool packVector2(const LLVector2 &value, const char *name);
/*virtual*/ bool unpackVector2(LLVector2 &value, const char *name);
/*virtual*/ bool packVector3(const LLVector3 &value, const char *name);
/*virtual*/ bool unpackVector3(LLVector3 &value, const char *name);
/*virtual*/ bool packVector4(const LLVector4 &value, const char *name);
/*virtual*/ bool unpackVector4(LLVector4 &value, const char *name);
/*virtual*/ bool packUUID(const LLUUID &value, const char *name);
/*virtual*/ bool unpackUUID(LLUUID &value, const char *name);
S32 getCurrentSize() const { return (S32)(mCurBufferp - mBufferp); }
S32 getBufferSize() const { return mBufferSize; }
const U8* getBuffer() const { return mBufferp; }
void reset() { mCurBufferp = mBufferp; mWriteEnabled = (mCurBufferp != NULL); }
void shift(S32 offset) { reset(); mCurBufferp += offset;}
void freeBuffer() { delete [] mBufferp; mBufferp = mCurBufferp = NULL; mBufferSize = 0; mWriteEnabled = false; }
void assignBuffer(U8 *bufferp, S32 size)
{
if(mBufferp && mBufferp != bufferp)
{
freeBuffer() ;
}
mBufferp = bufferp;
mCurBufferp = bufferp;
mBufferSize = size;
mWriteEnabled = true;
}
const LLDataPackerBinaryBuffer& operator=(const LLDataPackerBinaryBuffer &a);
/*virtual*/ bool hasNext() const { return getCurrentSize() < getBufferSize(); }
/*virtual*/ void dumpBufferToLog();
protected:
inline bool verifyLength(const S32 data_size, const char *name);
U8 *mBufferp;
U8 *mCurBufferp;
S32 mBufferSize;
};
inline bool LLDataPackerBinaryBuffer::verifyLength(const S32 data_size, const char *name)
{
if (mWriteEnabled && (mCurBufferp - mBufferp) > mBufferSize - data_size)
{
LL_WARNS() << "Buffer overflow in BinaryBuffer length verify, field name " << name << "!" << LL_ENDL;
LL_WARNS() << "Current pos: " << (int)(mCurBufferp - mBufferp) << " Buffer size: " << mBufferSize << " Data size: " << data_size << LL_ENDL;
return false;
}
return true;
}
class LLDataPackerAsciiBuffer : public LLDataPacker
{
public:
LLDataPackerAsciiBuffer(char* bufferp, S32 size)
{
mBufferp = bufferp;
mCurBufferp = bufferp;
mBufferSize = size;
mPassFlags = 0;
mIncludeNames = false;
mWriteEnabled = true;
}
LLDataPackerAsciiBuffer()
{
mBufferp = NULL;
mCurBufferp = NULL;
mBufferSize = 0;
mPassFlags = 0;
mIncludeNames = false;
mWriteEnabled = false;
}
/*virtual*/ bool packString(const std::string& value, const char *name);
/*virtual*/ bool unpackString(std::string& value, const char *name);
/*virtual*/ bool packBinaryData(const U8 *value, S32 size, const char *name);
/*virtual*/ bool unpackBinaryData(U8 *value, S32 &size, const char *name);
// Constant size binary data packing
/*virtual*/ bool packBinaryDataFixed(const U8 *value, S32 size, const char *name);
/*virtual*/ bool unpackBinaryDataFixed(U8 *value, S32 size, const char *name);
/*virtual*/ bool packU8(const U8 value, const char *name);
/*virtual*/ bool unpackU8(U8 &value, const char *name);
/*virtual*/ bool packU16(const U16 value, const char *name);
/*virtual*/ bool unpackU16(U16 &value, const char *name);
/*virtual*/ bool packS16(const S16 value, const char *name);
/*virtual*/ bool unpackS16(S16 &value, const char *name);
/*virtual*/ bool packU32(const U32 value, const char *name);
/*virtual*/ bool unpackU32(U32 &value, const char *name);
/*virtual*/ bool packS32(const S32 value, const char *name);
/*virtual*/ bool unpackS32(S32 &value, const char *name);
/*virtual*/ bool packF32(const F32 value, const char *name);
/*virtual*/ bool unpackF32(F32 &value, const char *name);
/*virtual*/ bool packColor4(const LLColor4 &value, const char *name);
/*virtual*/ bool unpackColor4(LLColor4 &value, const char *name);
/*virtual*/ bool packColor4U(const LLColor4U &value, const char *name);
/*virtual*/ bool unpackColor4U(LLColor4U &value, const char *name);
/*virtual*/ bool packVector2(const LLVector2 &value, const char *name);
/*virtual*/ bool unpackVector2(LLVector2 &value, const char *name);
/*virtual*/ bool packVector3(const LLVector3 &value, const char *name);
/*virtual*/ bool unpackVector3(LLVector3 &value, const char *name);
/*virtual*/ bool packVector4(const LLVector4 &value, const char *name);
/*virtual*/ bool unpackVector4(LLVector4 &value, const char *name);
/*virtual*/ bool packUUID(const LLUUID &value, const char *name);
/*virtual*/ bool unpackUUID(LLUUID &value, const char *name);
void setIncludeNames(bool b) { mIncludeNames = b; }
// Include the trailing NULL so it's always a valid string
S32 getCurrentSize() const { return (S32)(mCurBufferp - mBufferp) + 1; }
S32 getBufferSize() const { return mBufferSize; }
/*virtual*/ void reset() { mCurBufferp = mBufferp; mWriteEnabled = (mCurBufferp != NULL); }
/*virtual*/ bool hasNext() const { return getCurrentSize() < getBufferSize(); }
inline void freeBuffer();
inline void assignBuffer(char* bufferp, S32 size);
void dump();
protected:
void writeIndentedName(const char *name);
bool getValueStr(const char *name, char *out_value, const S32 value_len);
protected:
inline bool verifyLength(const S32 data_size, const char *name);
char *mBufferp;
char *mCurBufferp;
S32 mBufferSize;
bool mIncludeNames; // useful for debugging, print the name of each field
};
inline void LLDataPackerAsciiBuffer::freeBuffer()
{
delete [] mBufferp;
mBufferp = mCurBufferp = NULL;
mBufferSize = 0;
mWriteEnabled = false;
}
inline void LLDataPackerAsciiBuffer::assignBuffer(char* bufferp, S32 size)
{
mBufferp = bufferp;
mCurBufferp = bufferp;
mBufferSize = size;
mWriteEnabled = true;
}
inline bool LLDataPackerAsciiBuffer::verifyLength(const S32 data_size, const char *name)
{
if (mWriteEnabled && (mCurBufferp - mBufferp) > mBufferSize - data_size)
{
LL_WARNS() << "Buffer overflow in AsciiBuffer length verify, field name " << name << "!" << LL_ENDL;
LL_WARNS() << "Current pos: " << (int)(mCurBufferp - mBufferp) << " Buffer size: " << mBufferSize << " Data size: " << data_size << LL_ENDL;
return false;
}
return true;
}
class LLDataPackerAsciiFile : public LLDataPacker
{
public:
LLDataPackerAsciiFile(LLFILE *fp, const S32 indent = 2)
: LLDataPacker(),
mIndent(indent),
mFP(fp),
mOutputStream(NULL),
mInputStream(NULL)
{
}
LLDataPackerAsciiFile(std::ostream& output_stream, const S32 indent = 2)
: LLDataPacker(),
mIndent(indent),
mFP(NULL),
mOutputStream(&output_stream),
mInputStream(NULL)
{
mWriteEnabled = true;
}
LLDataPackerAsciiFile(std::istream& input_stream, const S32 indent = 2)
: LLDataPacker(),
mIndent(indent),
mFP(NULL),
mOutputStream(NULL),
mInputStream(&input_stream)
{
}
/*virtual*/ bool packString(const std::string& value, const char *name);
/*virtual*/ bool unpackString(std::string& value, const char *name);
/*virtual*/ bool packBinaryData(const U8 *value, S32 size, const char *name);
/*virtual*/ bool unpackBinaryData(U8 *value, S32 &size, const char *name);
/*virtual*/ bool packBinaryDataFixed(const U8 *value, S32 size, const char *name);
/*virtual*/ bool unpackBinaryDataFixed(U8 *value, S32 size, const char *name);
/*virtual*/ bool packU8(const U8 value, const char *name);
/*virtual*/ bool unpackU8(U8 &value, const char *name);
/*virtual*/ bool packU16(const U16 value, const char *name);
/*virtual*/ bool unpackU16(U16 &value, const char *name);
/*virtual*/ bool packS16(const S16 value, const char *name);
/*virtual*/ bool unpackS16(S16 &value, const char *name);
/*virtual*/ bool packU32(const U32 value, const char *name);
/*virtual*/ bool unpackU32(U32 &value, const char *name);
/*virtual*/ bool packS32(const S32 value, const char *name);
/*virtual*/ bool unpackS32(S32 &value, const char *name);
/*virtual*/ bool packF32(const F32 value, const char *name);
/*virtual*/ bool unpackF32(F32 &value, const char *name);
/*virtual*/ bool packColor4(const LLColor4 &value, const char *name);
/*virtual*/ bool unpackColor4(LLColor4 &value, const char *name);
/*virtual*/ bool packColor4U(const LLColor4U &value, const char *name);
/*virtual*/ bool unpackColor4U(LLColor4U &value, const char *name);
/*virtual*/ bool packVector2(const LLVector2 &value, const char *name);
/*virtual*/ bool unpackVector2(LLVector2 &value, const char *name);
/*virtual*/ bool packVector3(const LLVector3 &value, const char *name);
/*virtual*/ bool unpackVector3(LLVector3 &value, const char *name);
/*virtual*/ bool packVector4(const LLVector4 &value, const char *name);
/*virtual*/ bool unpackVector4(LLVector4 &value, const char *name);
/*virtual*/ bool packUUID(const LLUUID &value, const char *name);
/*virtual*/ bool unpackUUID(LLUUID &value, const char *name);
protected:
void writeIndentedName(const char *name);
bool getValueStr(const char *name, char *out_value, const S32 value_len);
/*virtual*/ bool hasNext() const { return true; }
protected:
S32 mIndent;
LLFILE *mFP;
std::ostream* mOutputStream;
std::istream* mInputStream;
};
#endif // LL_LLDATAPACKER
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