Block*
sourceBlock(Source *r, uint32_t bn, int mode)
{
Block *b;
b = _sourceBlock(r, bn, mode, 0, 0);
if(b)
b->pc = getcallerpc(&r);
return b;
}
/*
* Changes the file block bn to be the given block score.
* Very sneaky. Only used by flfmt.
*/
int
fileMapBlock(File *f, ulong bn, uchar score[VtScoreSize], ulong tag)
{
Block *b;
Entry e;
Source *s;
if(!fileLock(f))
return 0;
s = nil;
if(f->dir.mode & ModeDir){
vtSetError(ENotFile);
goto Err;
}
if(f->source->mode != OReadWrite){
vtSetError(EReadOnly);
goto Err;
}
if(!sourceLock(f->source, -1))
goto Err;
s = f->source;
b = _sourceBlock(s, bn, OReadWrite, 1, tag);
if(b == nil)
goto Err;
if(!sourceGetEntry(s, &e))
goto Err;
if(b->l.type == BtDir){
memmove(e.score, score, VtScoreSize);
assert(e.tag == tag || e.tag == 0);
e.tag = tag;
e.flags |= VtEntryLocal;
entryPack(&e, b->data, f->source->offset % f->source->epb);
}else
memmove(b->data + (bn%(e.psize/VtScoreSize))*VtScoreSize, score, VtScoreSize);
blockDirty(b);
blockPut(b);
sourceUnlock(s);
fileUnlock(f);
return 1;
Err:
if(s)
sourceUnlock(s);
fileUnlock(f);
return 0;
}
