void copydupe(uint16_t c,osFile oldfh,osFile newfh)
{
char buf[300];
uint16_t size;
osSeek(oldfh,dupebuf[c].offset,OFFSET_BEGINNING);
if(osRead(oldfh,&size,sizeof(uint16_t))!=sizeof(uint16_t))
return;
if(osRead(oldfh,buf,size) != size)
return;
if(!osWrite(newfh,&size,sizeof(uint16_t)))
{
uint32_t err=osError();
LogWrite(1,SYSTEMERR,"Failed to write to temporary dupe file");
LogWrite(1,SYSTEMERR,"Error: %s",osErrorMsg(err));
return;
}
if(!osWrite(newfh,buf,size))
{
uint32_t err=osError();
LogWrite(1,SYSTEMERR,"Failed to write to temporary dupe file");
LogWrite(1,SYSTEMERR,"Error: %s",osErrorMsg(err));
return;
}
}
void AddDupeBuf(char *buf,uint16_t size)
{
uint32_t offset;
uint32_t crc32,*crc32p;
osSeek(dupefh,0,OFFSET_END);
offset=osFTell(dupefh);
crc32p=(uint32_t *)buf;
crc32=*crc32p;
if(!osWrite(dupefh,&size,sizeof(uint16_t)))
{
uint32_t err=osError();
LogWrite(1,SYSTEMERR,"Failed to write to dupe file");
LogWrite(1,SYSTEMERR,"Error: %s",osErrorMsg(err));
return;
}
if(!osWrite(dupefh,buf,size))
{
uint32_t err=osError();
LogWrite(1,SYSTEMERR,"Failed to write to dupe file");
LogWrite(1,SYSTEMERR,"Error: %s",osErrorMsg(err));
return;
}
adddupeindex(offset,crc32);
dupechanged=TRUE;
}
// a simple test for OS layer
void osTest() {
SqlVFS *os = osGetVFS("unix");
SqlFile *file = osGetFileHandle(os);
printf("%d\n", osOpen(os, "data", file, O_RDWR | O_CREAT));
printf("%d\n", osWrite(file, "123", 3, 0));
printf("%d\n", osWrite(file, "abcd", 4, 1));
printf("%d\n", osTruncate(file, 2));
char buf[20];
int ret = osRead(file, buf, 20, 0);
printf("%d\n", ret);
buf[ret] = 0;
printf("%s\n", buf);
}
void CloseDupeDB(void)
{
osFile newfh;
uint32_t c;
char duptemp[200];
if(!dupechanged)
{
osClose(dupefh);
return;
}
strcpy(duptemp,config.cfg_DupeFile);
strcat(duptemp,".tmp");
if(!(newfh=osOpen(duptemp,MODE_NEWFILE)))
{
uint32_t err=osError();
LogWrite(1,SYSTEMERR,"Failed to open temporary dupe file %s for writing",duptemp);
LogWrite(1,SYSTEMERR,"Error: %s",osErrorMsg(err));
osFree(dupebuf);
osClose(dupefh);
return;
}
osWrite(newfh,DUPES_IDENTIFIER,4);
for(c=dupeentrynum;c<dupeentrymax;c++)
copydupe(c,dupefh,newfh);
for(c=0;c<dupeentrynum;c++)
copydupe(c,dupefh,newfh);
osClose(dupefh);
osClose(newfh);
osFree(dupebuf);
dupechanged=FALSE;
osDelete(config.cfg_DupeFile);
osRename(duptemp,config.cfg_DupeFile);
return;
}
bool OpenDupeDB(void)
{
char buf[300];
uint32_t offset,crc32,*crc32p;
uint16_t size,res;
if(!(dupebuf=osAlloc(config.cfg_DupeSize*sizeof(struct dupeentry))))
{
LogWrite(1,SYSTEMERR,"Not enough memory for dupe-check buffer\n");
return(FALSE);
}
dupeentrynum=0;
dupeentrymax=0;
dupechanged=FALSE;
if(!(dupefh=osOpen(config.cfg_DupeFile,MODE_READWRITE)))
{
uint32_t err=osError();
LogWrite(1,SYSTEMERR,"Failed to open dupe file %s in read/write mode",config.cfg_DupeFile);
LogWrite(1,SYSTEMERR,"Error: %s",osErrorMsg(err));
return(FALSE);
}
res=osRead(dupefh,buf,4);
buf[4]=0;
if(res == 0)
{
/* New file */
LogWrite(3,TOSSINGINFO,"Creating new dupe file %s",config.cfg_DupeFile);
strcpy(buf,DUPES_IDENTIFIER);
osWrite(dupefh,buf,4);
}
else if(res != 4 || strcmp(buf,DUPES_IDENTIFIER)!=0)
{
LogWrite(1,SYSTEMERR,"Invalid format of dupe file %s, exiting...",config.cfg_DupeFile);
osClose(dupefh);
return(FALSE);
}
offset=4;
while(osRead(dupefh,&size,sizeof(uint16_t))==sizeof(uint16_t))
{
if(size == 0 || size > 300) /* Unreasonably big */
{
LogWrite(1,SYSTEMERR,"Error in dupe file %s, exiting...",config.cfg_DupeFile);
osClose(dupefh);
return(FALSE);
}
if(osRead(dupefh,buf,(uint32_t)size) != size)
{
LogWrite(1,SYSTEMERR,"Error in dupe file %s, exiting...",config.cfg_DupeFile);
osClose(dupefh);
return(FALSE);
}
crc32p=(uint32_t *)buf;
crc32=*crc32p;
adddupeindex(offset,crc32);
offset += size+2;
}
dupechanged=FALSE;
return(TRUE);
}