char *CJHTreeNode::expandKeys(void *src,unsigned keylength,size32_t &retsize, bool rowcompression)
{
Owned<IExpander> exp = rowcompression?createRDiffExpander():createLZWExpander(true);
int len=exp->init(src);
if (len==0) {
retsize = 0;
return NULL;
}
char *outkeys=(char *) allocMem(len);
exp->expand(outkeys);
retsize = len;
return outkeys;
}
size32_t ThorExpand(const void * src, size32_t srcSz, void * dest, size32_t destSz)
{
size32_t ret;
memcpy(&ret, src, sizeof(size32_t));
byte *data = (byte *)src+sizeof(size32_t);
if(ret) // compressed
{
Owned<IExpander> expander = createLZWExpander();
assertex(destSz >= ret);
expander->init(data);
expander->expand(dest);
}
else
{
ret = srcSz - sizeof(size32_t);
assertex(destSz >= ret);
memcpy(dest, data, ret);
}
return ret;
}