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added IO for hash cache

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This commit is contained in:
mr-alice 2016-08-12 15:20:23 +02:00
parent d8dfce4fff
commit 733ad438fb
3 changed files with 144 additions and 5 deletions
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99
libretroshare/src/file_sharing/filelist_io.cc
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@ -1,2 +1,101 @@
#include "filelist_io.h"
bool FileListIO::writeField( unsigned char*&buff,uint32_t& buff_size,uint32_t& offset,uint8_t section_tag,const unsigned char * val,uint32_t size)
{
if(!checkSectionSize(buff,buff_size,offset,size))
return false;
if(!writeSectionHeader(buff,buff_size,offset,FILE_LIST_IO_TAG_BINARY_DATA,size))
return false;
memcpy(&buff[offset],val,size) ;
offset += size ;
return true;
}
bool FileListIO::readField (const unsigned char *buff,uint32_t buff_size,uint32_t& offset,uint8_t check_section_tag, unsigned char *& val,uint32_t& size)
{
if(!readSectionHeader(buff,buff_size,offset,FILE_LIST_IO_TAG_BINARY_DATA,size))
return false;
val = (unsigned char *)rs_malloc(size) ;
if(!val)
return false;
memcpy(val,&buff[offset],size);
offset += size ;
return true ;
}
bool FileListIO::write125Size(unsigned char *data,uint32_t data_size,uint32_t& offset,uint32_t S)
{
if(S < 192)
{
if(offset+1 > data_size)
return false;
data[offset++] = (uint8_t)S ;
return true;
}
else if(S < 8384)
{
if(offset+2 > data_size)
return false;
data[offset++] = (uint8_t)((S >> 8) + 192) ;
data[offset++] = (uint8_t)((S & 255) - 192) ;
return true;
}
else
{
if(offset+5 > data_size)
return false;
data[offset++] = 0xff ;
data[offset++] = (uint8_t)((S >> 24) & 255) ;
data[offset++] = (uint8_t)((S >> 16) & 255) ;
data[offset++] = (uint8_t)((S >> 8) & 255) ;
data[offset++] = (uint8_t)((S ) & 255) ;
return true ;
}
}
bool FileListIO::read125Size(const unsigned char *data,uint32_t data_size,uint32_t& offset,uint32_t& S)
{
if(offset + 1 >= data_size) return false;
uint8_t b1 = data[offset++] ;
if(b1 < 192)
{
S = b1;
return true ;
}
if(offset + 1 >= data_size) return false;
uint8_t b2 = data[offset++] ;
if(b1 < 224)
{
S = ((b1-192) << 8) + b2 + 192 ;
return true;
}
if(b1 != 0xff)
return false;
if(offset + 3 >= data_size) return false;
uint8_t b3 = data[offset++];
uint8_t b4 = data[offset++];
uint8_t b5 = data[offset++];
S = (b2 << 24) | (b3 << 16) | (b4 << 8) | b5 ;
return true;
}