int BDATreader::open(string fn,bool makeTOC) {
if(state==0) {
char FID[8];
unsigned int BOM;
if(fn.length()>0) filename=fn;
f=FileOpen(filename,fmOpenRead);
if(f<0) return -2;
size=FileSize(f);
pos=0;
FileRead(f,FID,4);FID[4]=0;pos+=4;
FileRead(f,&BOM,4);pos+=4;
if(string(FID)!="BDAT") return -3;
//check for endian encoding of file data - not implemented/used
switch (BOM) {
case 0xFEFF:
endian=0; //match
break;
default:
endian=-1;
break;
}
if(makeTOC) createTOC();
state=1;
lastinfo.records=0;
}
else return -1;
return 0;
};
void DocumentationPlugin::reload()
{
clear();
for (QValueList<DocumentationCatalogItem *>::iterator it = catalogs.begin();
it != catalogs.end(); ++it)
{
createTOC(*it);
}
}
int BDATreader::seek(unsigned int ID,datablockinfo &db) {
int n=0;
if(!hasTOC) createTOC();
if(!hasTOC) return -1; //no TOC available (empty file?)
while((n<TOCN) && (TOCID[n]!=ID)) n++;
if(n==TOCN) return -2; //entry not found
pos=TOCpos[n];state=1;
FileSeek(f,pos,SEEK_SET);
return getnextblockinfo(db);
};