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added load/save for file hash cache

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This commit is contained in:
MrAlice 2016-08-09 15:07:02 +02:00
parent 2d1824b01d
commit 82c18bbb86
6 changed files with 245 additions and 13 deletions
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58
libretroshare/src/file_sharing/filelist_io.h Normal file
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#pragma once
#include <stdint.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.
static const uint8_t DIRECTORY_STORAGE_VERSION = 0x01 ;
static const uint8_t FILE_LIST_IO_TAG_FILE_SHA1_HASH = 0x01 ;
static const uint8_t FILE_LIST_IO_TAG_FILE_NAME = 0x02 ;
static const uint8_t FILE_LIST_IO_TAG_FILE_SIZE = 0x03 ;
static const uint8_t FILE_LIST_IO_TAG_DIR_NAME = 0x04 ;
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 ;
class FileListIO
{
public:
template<typename T>
static bool writeField(unsigned char *& buff,uint32_t& buff_size,uint32_t& offset,uint8_t section_tag,const T& val)
{
if(!checkSectionSize(buff,buff_size,offset,sizeof(T)))
return false;
if(!writeSectionHeader(buff,buff_size,offset,section_tag,sizeof(T)))
return false;
memcpy(&buff[offset],reinterpret_cast<const uint8_t*>(&val),sizeof(T)) ;
offset += sizeof(T) ;
return true;
}
private:
static bool checkSectionSize(unsigned char *& buff,uint32_t& buff_size,uint32_t offset,uint32_t S)
{
if(offset + S > buff_size)
{
buff = (unsigned char *)realloc(buff,offset + S) ;
buff_size = offset + S ;
if(!buff)
return false ;
}
return true ;
}
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 ;
return true;
}
};