RetroShare/libretroshare/src/serialiser/rsbaseserial.cc

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/*
* libretroshare/src/serialiser: rsbaseserial.cc
*
* RetroShare Serialiser.
*
* Copyright 2007-2008 by Robert Fernie.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "retroshare@lunamutt.com".
*
*/
#include <stdlib.h> /* Included because GCC4.4 wants it */
#include <string.h> /* Included because GCC4.4 wants it */
#include "retroshare/rstypes.h"
#include "serialiser/rsbaseserial.h"
#include "util/rsnet.h"
#include <iostream>
/* UInt8 get/set */
bool getRawUInt8(void *data, uint32_t size, uint32_t *offset, uint8_t *out)
{
/* first check there is space */
if (size < *offset + 1)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* extract the data */
memcpy(out, buf, sizeof(uint8_t));
(*offset) += 1;
return true;
}
bool setRawUInt8(void *data, uint32_t size, uint32_t *offset, uint8_t in)
{
/* first check there is space */
if (size < *offset + 1)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* pack it in */
memcpy(buf, &in, sizeof(uint8_t));
(*offset) += 1;
return true;
}
/* UInt16 get/set */
bool getRawUInt16(void *data, uint32_t size, uint32_t *offset, uint16_t *out)
{
/* first check there is space */
if (size < *offset + 2)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* extract the data */
uint16_t netorder_num;
memcpy(&netorder_num, buf, sizeof(uint16_t));
(*out) = ntohs(netorder_num);
(*offset) += 2;
return true;
}
bool setRawUInt16(void *data, uint32_t size, uint32_t *offset, uint16_t in)
{
/* first check there is space */
if (size < *offset + 2)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* convert the data to the right format */
uint16_t netorder_num = htons(in);
/* pack it in */
memcpy(buf, &netorder_num, sizeof(uint16_t));
(*offset) += 2;
return true;
}
/* UInt32 get/set */
bool getRawUInt32(void *data, uint32_t size, uint32_t *offset, uint32_t *out)
{
/* first check there is space */
if (size < *offset + 4)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* extract the data */
uint32_t netorder_num;
memcpy(&netorder_num, buf, sizeof(uint32_t));
(*out) = ntohl(netorder_num);
(*offset) += 4;
return true;
}
bool setRawUInt32(void *data, uint32_t size, uint32_t *offset, uint32_t in)
{
/* first check there is space */
if (size < *offset + 4)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* convert the data to the right format */
uint32_t netorder_num = htonl(in);
/* pack it in */
memcpy(buf, &netorder_num, sizeof(uint32_t));
(*offset) += 4;
return true;
}
/* UInt64 get/set */
bool getRawUInt64(void *data, uint32_t size, uint32_t *offset, uint64_t *out)
{
/* first check there is space */
if (size < *offset + 8)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* extract the data */
uint64_t netorder_num;
memcpy(&netorder_num, buf, sizeof(uint64_t));
(*out) = ntohll(netorder_num);
(*offset) += 8;
return true;
}
bool setRawUInt64(void *data, uint32_t size, uint32_t *offset, uint64_t in)
{
/* first check there is space */
if (size < *offset + 8)
{
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* convert the data to the right format */
uint64_t netorder_num = htonll(in);
/* pack it in */
memcpy(buf, &netorder_num, sizeof(uint64_t));
(*offset) += 8;
return true;
}
bool getRawUFloat32(void *data,uint32_t size,uint32_t *offset,float& f)
{
uint32_t n ;
if(!getRawUInt32(data, size, offset, &n) )
return false ;
f = 1.0f/ ( n/(float)(~(uint32_t)0)) - 1.0f ;
return true ;
}
bool setRawUFloat32(void *data,uint32_t size,uint32_t *offset,float f)
{
if(f < 0.0f)
{
std::cerr << "(EE) Cannot serialise invalid negative float value " << f << " in " << __PRETTY_FUNCTION__ << std::endl;
return false ;
}
// This serialisation is quite accurate. The max relative error is approx.
// 0.01% and most of the time less than 1e-05% The error is well distributed
// over numbers also.
//
uint32_t n = (f < 1e-7)?(~(uint32_t)0): ((uint32_t)( (1.0f/(1.0f+f) * (~(uint32_t)0)))) ;
return setRawUInt32(data, size, offset, n);
}
bool getRawSha1(void *data,uint32_t size,uint32_t *offset,Sha1CheckSum& cs)
{
uint32_t len = Sha1CheckSum::SIZE_IN_BYTES ; // SHA1 length in bytes = 20
/* check there is space for string */
if (size < *offset + len)
{
std::cerr << "getRawSha1() not enough size" << std::endl;
return false;
}
bool ok = true ;
cs = Sha1CheckSum(&((uint8_t*)data)[*offset]) ;
*offset += Sha1CheckSum::SIZE_IN_BYTES ;
return ok ;
}
bool setRawSha1(void *data,uint32_t size,uint32_t *offset,const Sha1CheckSum& cs)
{
uint32_t len = Sha1CheckSum::SIZE_IN_BYTES ; // SHA1 length in bytes
if (size < *offset + len)
{
std::cerr << "setRawSha1() Not enough size" << std::endl;
return false;
}
bool ok = true ;
/* pack it in */
memcpy((void *) &(((uint8_t *) data)[*offset]), cs.toByteArray(), Sha1CheckSum::SIZE_IN_BYTES) ;
offset += Sha1CheckSum::SIZE_IN_BYTES ;
return true ;
}
bool getRawSSLId(void *data,uint32_t size,uint32_t *offset,SSLIdType& cs)
{
uint32_t len = 16 ; // SSL id type
/* check there is space for string */
if (size < *offset + len)
{
std::cerr << "getRawSha1() not enough size" << std::endl;
return false;
}
bool ok = true ;
cs = SSLIdType(&((uint8_t*)data)[*offset]) ;
*offset += 16 ;
return ok ;
}
bool setRawSSLId(void *data,uint32_t size,uint32_t *offset,const SSLIdType& cs)
{
uint32_t len = 16 ; // SHA1 length in bytes
if (size < *offset + len)
{
std::cerr << "setRawSha1() Not enough size" << std::endl;
return false;
}
memcpy((void *) &(((uint8_t *) data)[*offset]), cs.toByteArray(), 16);
*offset += 16 ;
return true ;
}
bool getRawPGPFingerprint(void *data,uint32_t size,uint32_t *offset,PGPFingerprintType& cs)
{
uint32_t len = 20 ; // SSL id type
/* check there is space for string */
if (size < *offset + len)
{
std::cerr << "getRawPGPFingerprint() not enough size" << std::endl;
return false;
}
bool ok = true ;
cs = PGPFingerprintType(&((uint8_t*)data)[*offset]) ;
*offset += 20 ;
return ok ;
}
bool setRawPGPFingerprint(void *data,uint32_t size,uint32_t *offset,const PGPFingerprintType& cs)
{
uint32_t len = 20 ; // SHA1 length in bytes
if (size < *offset + len)
{
std::cerr << "setRawPGPFingerprint() Not enough size" << std::endl;
return false;
}
memcpy((void *) &(((uint8_t *) data)[*offset]), cs.toByteArray(), 20);
*offset += 20 ;
return true ;
}
bool getRawString(void *data, uint32_t size, uint32_t *offset, std::string &outStr)
{
uint32_t len = 0;
if (!getRawUInt32(data, size, offset, &len))
{
std::cerr << "getRawString() get size failed" << std::endl;
return false;
}
/* check there is space for string */
if (size < *offset + len)
{
std::cerr << "getRawString() not enough size" << std::endl;
return false;
}
uint8_t *buf = &(((uint8_t *) data)[*offset]);
for (uint32_t i = 0; i < len; i++)
{
outStr += buf[i];
}
(*offset) += len;
return true;
}
bool setRawString(void *data, uint32_t size, uint32_t *offset, const std::string &inStr)
{
uint32_t len = inStr.length();
/* first check there is space */
if (size < *offset + 4 + len)
{
//#ifdef RSSERIAL_DEBUG
std::cerr << "setRawString() Not enough size" << std::endl;
//#endif
return false;
}
if (!setRawUInt32(data, size, offset, len))
{
std::cerr << "setRawString() set size failed" << std::endl;
return false;
}
void *buf = (void *) &(((uint8_t *) data)[*offset]);
/* pack it in */
memcpy(buf, inStr.c_str(), len);
(*offset) += len;
return true;
}
bool getRawTimeT(void *data,uint32_t size,uint32_t *offset,time_t& t)
{
uint64_t T ;
bool res = getRawUInt64(data,size,offset,&T) ;
t = T ;
return res ;
}
bool setRawTimeT(void *data,uint32_t size,uint32_t *offset,const time_t& t)
{
return setRawUInt64(data,size,offset,t) ;
}