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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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45
libretroshare/src/file_sharing/filelist_io.h
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@ -1,6 +1,10 @@
#pragma once
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "util/rsmemory.h"
// This file implements load/save of various fields used for file lists and directory content.
// WARNING: the encoding is system-dependent, so this should *not* be used to exchange data between computers.
@ -15,6 +19,7 @@ static const uint8_t FILE_LIST_IO_TAG_MODIF_TS = 0x05 ;
static const uint8_t FILE_LIST_IO_TAG_RECURS_MODIF_TS = 0x06 ;
static const uint8_t FILE_LIST_IO_TAG_HASH_STORAGE_ENTRY = 0x07 ;
static const uint8_t FILE_LIST_IO_TAG_UPDATE_TS = 0x08 ;
static const uint8_t FILE_LIST_IO_TAG_BINARY_DATA = 0x09 ;
class FileListIO
{
@ -34,7 +39,30 @@ public:
return true;
}
template<typename T>
static bool readField(const unsigned char *buff,uint32_t buff_size,uint32_t& offset,uint8_t check_section_tag,T& val)
{
uint32_t section_size ;
if(!readSectionHeader(buff,buff_size,offset,check_section_tag,section_size))
return false;
if(section_size != sizeof(T))
return false ;
memcpy(reinterpret_cast<uint8_t*>(&val),&buff[offset],sizeof(T)) ;
offset += sizeof(T) ;
return true;
}
static bool writeField( unsigned char*&buff,uint32_t& buff_size,uint32_t& offset,uint8_t section_tag,const unsigned char * val,uint32_t size) ;
static bool readField (const unsigned char *buff,uint32_t buff_size,uint32_t& offset,uint8_t check_section_tag, unsigned char *& val,uint32_t& size) ;
private:
static bool write125Size(unsigned char *data,uint32_t total_size,uint32_t& offset,uint32_t size) ;
static bool read125Size (const unsigned char *data,uint32_t total_size,uint32_t& offset,uint32_t& size) ;
static bool checkSectionSize(unsigned char *& buff,uint32_t& buff_size,uint32_t offset,uint32_t S)
{
if(offset + S > buff_size)
@ -48,11 +76,24 @@ private:
return true ;
}
static bool writeSectionHeader(unsigned char *& buff,uint32_t& buff_size,uint32_t offset,uint8_t section_tag,uint32_t S)
static bool writeSectionHeader(unsigned char *& buff,uint32_t& buff_size,uint32_t& offset,uint8_t section_tag,uint32_t S)
{
buff[offset++] = section_tag ;
if(!write125Size(buff,offset,buff_size,S)) return false ;
if(!write125Size(buff,buff_size,offset,S)) return false ;
return true;
}
static bool readSectionHeader(const unsigned char *& buff,uint32_t buff_size,uint32_t& offset,uint8_t check_section_tag,uint32_t& S)
{
if(offset + 1 > buff_size)
return false ;
uint8_t section_tag = buff[offset++] ;
if(section_tag != check_section_tag)
return false;
return read125Size(buff,buff_size,offset,S) ;
}
};