Mmoffset HistoryTable::next() {
Commit* commit = 0;
if (rewound)
iter = theDB()->mmf->begin();
else
commit = (Commit*) *iter;
rewound = false;
const Mmfile::iterator end = theDB()->mmf->end();
while (iter != end) {
if (commit) {
if (id + 1 < commit->ndeletes)
return commit->deletes()[++id].unpack();
id = commit->ndeletes;
if (ic + 1 < commit->ncreates)
return commit->creates()[++ic].unpack();
ic = commit->ncreates;
}
do
if (++iter == end) {
rewind();
return 0;
}
while (iter.type() != MM_COMMIT);
commit = (Commit*) *iter;
id = ic = -1;
}
rewind();
return 0;
}
static void load_data_record(Istream& fin, const gcstring& table, int tran, int n)
{
try
{
if (n > loadbuf_size)
{
loadbuf_size = max(n, 2 * loadbuf_size);
mem_release(loadbuf);
loadbuf = (char*) mem_committed(loadbuf_size);
verify(loadbuf);
}
fin.read(loadbuf, n);
Record rec(loadbuf);
if (rec.cursize() != n)
except_err(table << ": rec size " << rec.cursize() << " not what was read " << n);
if (table == "views")
theDB()->add_any_record(tran, table, rec);
else
theDB()->add_record(tran, table, rec);
}
catch (const Except& e)
{
errlog("load: skipping corrupted record in: ", table.str(), e.str());
alert("skipping corrupted record in: " << table << ": " << e);
alerts = true;
}
}
Mmoffset HistoryTable::prev() {
Commit* commit = 0;
if (rewound)
iter = theDB()->mmf->end();
else
commit = (Commit*) *iter;
rewound = false;
const Mmfile::iterator begin = theDB()->mmf->begin();
while (iter != begin) {
if (commit) {
if (ic > 0)
return commit->creates()[--ic].unpack();
ic = -1;
if (id > 0)
return commit->deletes()[--id].unpack();
id = -1;
}
do
if (--iter == begin) {
rewind();
return 0;
}
while (iter.type() != MM_COMMIT);
commit = (Commit*) *iter;
id = commit->ndeletes;
ic = commit->ncreates;
}
rewind();
return 0;
}
static int load1(Istream& fin, gcstring tblspec)
{
int n = tblspec.find(' ', 7);
gcstring table = tblspec.substr(7, n - 7);
if (table != "views")
{
if (theDB()->istable(table))
theDB()->remove_table(table);
database_admin(tblspec.str());
}
return load_data(fin, table);
}
~Loading()
{
theDB()->loading = false;
mem_release(loadbuf);
loadbuf = 0;
loadbuf_size = 0;
}
Loading()
{
theDB()->loading = true;
loadbuf_size = 100000;
loadbuf = (char*) mem_committed(loadbuf_size);
verify(loadbuf);
}
void CAVolumeCurve::AddRange(SInt32 inMinRaw, SInt32 inMaxRaw, Float64 inMinDB, Float64 inMaxDB)
{
CARawPoint theRaw(inMinRaw, inMaxRaw);
CADBPoint theDB(inMinDB, inMaxDB);
bool isOverlapped = false;
bool isDone = false;
CurveMap::iterator theIterator = mCurveMap.begin();
while((theIterator != mCurveMap.end()) && !isOverlapped && !isDone)
{
isOverlapped = CARawPoint::Overlap(theRaw, theIterator->first);
isDone = theRaw >= theIterator->first;
if(!isOverlapped && !isDone)
{
std::advance(theIterator, 1);
}
}
if(!isOverlapped)
{
mCurveMap.insert(CurveMap::value_type(theRaw, theDB));
}
else
{
DebugMessage("CAVolumeCurve::AddRange: new point overlaps");
}
}
Row HistoryTable::get(Dir dir) {
void* p;
Mmoffset offset;
do {
offset = dir == NEXT ? next() : prev();
if (offset == 0)
return Eof;
p = theDB()->mmf->adr(offset - sizeof(int));
} while (*(int*) p != tblnum);
Record r1;
Commit* commit = (Commit*) *iter;
r1.addval(SuDate::parse(ctime(&commit->t)));
r1.addval(dir == NEXT
? 0 <= ic && ic < commit->ncreates ? "create" : "delete"
: 0 <= id && id < commit->ndeletes ? "delete" : "create");
Record r2(theDB()->mmf, offset);
static Record emptyrec;
return Row(lisp(emptyrec, r1, emptyrec, r2));
}
static int load_data(Istream& fin, const gcstring& table)
{
int nrecs = 0;
int tran = theDB()->transaction(READWRITE);
for (;; ++nrecs)
{
int n;
fin.read((char*) &n, sizeof n);
if (fin.gcount() != sizeof n)
except("unexpected eof");
if (n == 0)
break ;
load_data_record(fin, table, tran, n);
if (nrecs % recsPerTran == recsPerTran - 1)
{
verify(theDB()->commit(tran));
tran = theDB()->transaction(READWRITE);
}
}
verify(theDB()->commit(tran));
return nrecs;
}
TranCloser::~TranCloser() {
theDB()->abort(t);
}
Row Project::get(Dir dir)
{
static Record emptyrec;
if (first)
{
first = false;
src_hdr = source->header();
proj_hdr = src_hdr.project(flds);
if (strategy == LOOKUP)
{
if (idx)
idx->free();
idx = new VVtree(td = new TempDest);
indexed = false;
}
}
if (strategy == COPY)
{
return source->get(dir);
}
else if (strategy == SEQUENTIAL)
{
if (dir == NEXT)
{
// output the first of each group
// i.e. skip over rows the same as previous output
Row row;
do
if (Eof == (row = source->get(NEXT)))
return Eof;
while (! rewound && equal(proj_hdr, row, currow));
rewound = false;
prevrow = currow;
currow = row;
// output the first row of a new group
return Row(lisp(emptyrec, row_to_key(src_hdr, row, flds)));
}
else // dir == PREV
{
// output the last of each group
// i.e. output when *next* record is different
// (to get the same records as NEXT)
if (rewound)
prevrow = source->get(PREV);
rewound = false;
Row row;
do
{
if (Eof == (row = prevrow))
return Eof;
prevrow = source->get(PREV);
}
while (equal(proj_hdr, row, prevrow));
// output the last row of a group
currow = row;
return Row(lisp(emptyrec, row_to_key(src_hdr, row, flds)));
}
}
else
{
verify(strategy == LOOKUP);
if (rewound)
{
rewound = false;
if (dir == PREV && ! indexed)
{
// pre-build the index
Row row;
while (Eof != (row = source->get(NEXT)))
{
Record key = row_to_key(src_hdr, row, flds);
Vdata data(row.data);
for (Lisp<Record> rs = row.data; ! nil(rs); ++rs)
td->addref(rs->ptr());
// insert will only succeed on first of dups
idx->insert(VVslot(key, &data));
}
source->rewind();
indexed = true;
}
}
Row row;
while (Eof != (row = source->get(dir)))
{
Record key = row_to_key(src_hdr, row, flds);
VVtree::iterator iter = idx->find(key);
if (iter == idx->end())
{
for (Lisp<Record> rs = row.data; ! nil(rs); ++rs)
td->addref(rs->ptr());
Vdata data(row.data);
verify(idx->insert(VVslot(key, &data)));
return Row(lisp(emptyrec, key));
}
else
{
Vdata* d = iter->data;
Records rs;
for (int i = d->n - 1; i >= 0; --i)
rs.push(Record::from_int(d->r[i], theDB()->mmf));
Row irow(rs);
if (row == irow)
return Row(lisp(emptyrec, key));
}
}
if (dir == NEXT)
indexed = true;
return Eof;
}
}
Header HistoryTable::header() {
return Header(lisp(Fields(), lisp(gcstring("_date"), gcstring("_action")),
Fields(), theDB()->get_fields(table)),
columns());
}
Fields HistoryTable::columns() {
Fields flds = theDB()->get_columns(table);
flds.push("_action");
flds.push("_date");
return flds;
}
HistoryTable::HistoryTable(const gcstring& t)
: table(t), tblnum(theDB()->ck_get_table(t)->num) {
}
