// Probably file arrived on the disk
bool notifyDatabaseName(const Firebird::PathName& file)
{
#ifdef HAVE_ID_BY_NAME
// notifyDatabaseName typically causes changes in aliasesConf()
// cause it's called only from Config created for missing database.
// Therefore always take write lock at once.
WriteLockGuard guard(aliasesConf().rwLock, "notifyDatabaseName");
DbName* db = aliasesConf().dbHash.lookup(file);
if (!db)
return true;
if (db->id)
return true;
UCharBuffer id;
os_utils::getUniqueFileId(file.c_str(), id);
if (id.hasData())
{
aliasesConf().linkId(db, id);
return true;
}
#endif
return false;
}
void PreparedStatement::parseDsqlMessage(const dsql_msg* dsqlMsg, Array<dsc>& values,
MsgMetadata* msgMetadata, UCharBuffer& msg)
{
// hvlad: Parameters in dsqlMsg->msg_parameters almost always linked in descending
// order by par_index. The only known exception is EXECUTE BLOCK statement.
// To generate correct metadata we must walk params in ascending par_index order.
// So store all params in array in an ascending par_index order despite of
// order in linked list.
// ASF: Input parameters don't come necessarily in ascending or descending order,
// so I changed the code to use a SortedArray.
// AP: removed assertions for correct parameters order - useless with SortedArray.
SortedArray<const dsql_par*, InlineStorage<const dsql_par*, 16>, const dsql_par*,
DefaultKeyValue<const dsql_par*>, ParamCmp> params;
for (size_t i = 0; i < dsqlMsg->msg_parameters.getCount(); ++i)
{
dsql_par* par = dsqlMsg->msg_parameters[i];
if (par->par_index)
params.add(par);
}
size_t paramCount = params.getCount();
values.resize(paramCount * 2);
msgMetadata->setItemsCount(paramCount);
for (size_t i = 0; i < paramCount; ++i)
dscToMetaItem(¶ms[i]->par_desc, msgMetadata->getItem(i));
msgMetadata->makeOffsets();
msg.resize(msgMetadata->getMessageLength());
dsc* value = values.begin();
for (size_t i = 0; i < paramCount; ++i)
{
// value
*value = params[i]->par_desc;
value->dsc_address = msg.begin() + msgMetadata->getItem(i).offset;
++value;
// NULL indicator
value->makeShort(0);
value->dsc_address = msg.begin() + msgMetadata->getItem(i).nullInd;
// set NULL indicator value
*((SSHORT*) value->dsc_address) = -1;
++value;
}
}
void PIO_get_unique_file_id(const Jrd::jrd_file* file, UCharBuffer& id)
{
/**************************************
*
* P I O _ g e t _ u n i q u e _ f i l e _ i d
*
**************************************
*
* Functional description
* Return a binary string that uniquely identifies the file.
*
**************************************/
struct stat statistics;
if (fstat(file->fil_desc, &statistics) != 0) {
unix_error("fstat", file, isc_io_access_err);
}
const size_t len1 = sizeof(statistics.st_dev);
const size_t len2 = sizeof(statistics.st_ino);
UCHAR* p = id.getBuffer(len1 + len2);
memcpy(p, &statistics.st_dev, len1);
p += len1;
memcpy(p, &statistics.st_ino, len2);
}
string Database::getUniqueFileId() const
{
const PageSpace* const pageSpace = dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
UCharBuffer buffer;
os_utils::getUniqueFileId(pageSpace->file->fil_desc, buffer);
string file_id;
char* s = file_id.getBuffer(2 * buffer.getCount());
for (FB_SIZE_T i = 0; i < buffer.getCount(); i++)
{
sprintf(s, "%02x", (int) buffer[i]);
s += 2;
}
return file_id;
}
void IntlUtil::getDefaultCollationAttributes(UCharBuffer& collAttributes, charset& cs)
{
string attributes("ICU-VERSION=");
attributes += Jrd::UnicodeUtil::getDefaultIcuVersion();
setupIcuAttributes(&cs, attributes, "", attributes);
collAttributes.push(reinterpret_cast<const UCHAR*>(attributes.c_str()), attributes.length());
}
// We store in CS_METADATA.
void Jrd::Attachment::storeMetaDataBlob(thread_db* tdbb, jrd_tra* transaction,
bid* blobId, const string& text, USHORT fromCharSet)
{
UCharBuffer bpb;
if (fromCharSet != CS_METADATA)
BLB_gen_bpb(isc_blob_text, isc_blob_text, fromCharSet, CS_METADATA, bpb);
blb* blob = blb::create2(tdbb, transaction, blobId, bpb.getCount(), bpb.begin());
try
{
blob->BLB_put_data(tdbb, (const UCHAR*) text.c_str(), text.length());
}
catch (const Exception&)
{
blob->BLB_close(tdbb);
throw;
}
blob->BLB_close(tdbb);
}
static void makeUniqueFileId(const struct stat& statistics, UCharBuffer& id)
{
const size_t len1 = sizeof(statistics.st_dev);
const size_t len2 = sizeof(statistics.st_ino);
UCHAR* p = id.getBuffer(len1 + len2);
memcpy(p, &statistics.st_dev, len1);
p += len1;
memcpy(p, &statistics.st_ino, len2);
}
void getUniqueFileId(const char* name, UCharBuffer& id)
{
struct STAT statistics;
if (os_utils::stat(name, &statistics) != 0)
{
id.clear();
return;
}
makeUniqueFileId(statistics, id);
}
UnicodeCollationHolder::UnicodeCollationHolder(MemoryPool& pool)
{
cs = FB_NEW(pool) charset;
tt = FB_NEW(pool) texttype;
IntlUtil::initUtf8Charset(cs);
string collAttributes("ICU-VERSION=");
collAttributes += Jrd::UnicodeUtil::DEFAULT_ICU_VERSION;
IntlUtil::setupIcuAttributes(cs, collAttributes, "", collAttributes);
UCharBuffer collAttributesBuffer;
collAttributesBuffer.push(reinterpret_cast<const UCHAR*>(collAttributes.c_str()),
collAttributes.length());
if (!IntlUtil::initUnicodeCollation(tt, cs, "UNICODE", 0, collAttributesBuffer, string()))
fatal_exception::raiseFmt("cannot initialize UNICODE collation to use in trace plugin");
charSet = Jrd::CharSet::createInstance(pool, 0, cs);
textType = FB_NEW(pool) Jrd::TextType(0, tt, charSet);
}
void getUniqueFileId(const char* name, UCharBuffer& id)
{
struct stat statistics;
while (stat(name, &statistics) != 0)
{
if (errno == EINTR)
continue;
id.clear();
return;
}
makeUniqueFileId(statistics, id);
}
// Parse routine BLR.
void Routine::parseBlr(thread_db* tdbb, CompilerScratch* csb, bid* blob_id)
{
Jrd::Attachment* attachment = tdbb->getAttachment();
UCharBuffer tmp;
if (blob_id)
{
blb* blob = blb::open(tdbb, attachment->getSysTransaction(), blob_id);
ULONG length = blob->blb_length + 10;
UCHAR* temp = tmp.getBuffer(length);
length = blob->BLB_get_data(tdbb, temp, length);
tmp.resize(length);
}
parseMessages(tdbb, csb, BlrReader(tmp.begin(), (unsigned) tmp.getCount()));
JrdStatement* statement = getStatement();
PAR_blr(tdbb, NULL, tmp.begin(), (ULONG) tmp.getCount(), NULL, &csb, &statement, false, 0);
setStatement(statement);
if (!blob_id)
setImplemented(false);
}
bool MergeJoin::getRecord(thread_db* tdbb) const
{
if (--tdbb->tdbb_quantum < 0)
JRD_reschedule(tdbb, 0, true);
jrd_req* const request = tdbb->getRequest();
Impure* const impure = request->getImpure<Impure>(m_impure);
if (!(impure->irsb_flags & irsb_open))
return false;
// If there is a record group already formed, fetch the next combination
if (fetchRecord(tdbb, m_args.getCount() - 1))
return true;
// Assuming we are done with the current value group, advance each
// stream one record. If any comes up dry, we're done.
const NestConst<SortedStream>* highest_ptr = m_args.begin();
FB_SIZE_T highest_index = 0;
for (FB_SIZE_T i = 0; i < m_args.getCount(); i++)
{
const NestConst<SortedStream>* const ptr = &m_args[i];
const SortedStream* const sort_rsb = *ptr;
const NestValueArray* const sort_key = m_keys[i];
Impure::irsb_mrg_repeat* const tail = &impure->irsb_mrg_rpt[i];
MergeFile* const mfb = &tail->irsb_mrg_file;
// reset equality group record positions
tail->irsb_mrg_equal = 0;
tail->irsb_mrg_equal_current = 0;
tail->irsb_mrg_equal_end = 0;
// If there is a record waiting, use it. Otherwise get another.
SLONG record = tail->irsb_mrg_last_fetched;
if (record >= 0)
{
tail->irsb_mrg_last_fetched = -1;
const UCHAR* const last_data = getData(tdbb, mfb, record);
mfb->mfb_current_block = 0;
UCHAR* const first_data = getData(tdbb, mfb, 0);
if (first_data != last_data)
memcpy(first_data, last_data, sort_rsb->getLength());
mfb->mfb_equal_records = 1;
record = 0;
}
else
{
mfb->mfb_current_block = 0;
mfb->mfb_equal_records = 0;
if ((record = getRecord(tdbb, i)) < 0)
return false;
}
// map data into target records and do comparison
sort_rsb->mapData(tdbb, request, getData(tdbb, mfb, record));
if (ptr != highest_ptr && compare(tdbb, m_keys[highest_index], sort_key) < 0)
{
highest_ptr = ptr;
highest_index = i;
}
}
// Loop thru the streams advancing each up to the target value.
// If any exceeds the target value, start over.
while (true)
{
bool recycle = false;
for (FB_SIZE_T i = 0; i < m_args.getCount(); i++)
{
const NestConst<SortedStream>* const ptr = &m_args[i];
const SortedStream* const sort_rsb = *ptr;
const NestValueArray* const sort_key = m_keys[i];
Impure::irsb_mrg_repeat* const tail = &impure->irsb_mrg_rpt[i];
if (highest_ptr != ptr)
{
int result;
while ( (result = compare(tdbb, m_keys[highest_index], sort_key)) )
{
if (result < 0)
{
highest_ptr = ptr;
highest_index = i;
recycle = true;
break;
}
MergeFile* const mfb = &tail->irsb_mrg_file;
mfb->mfb_current_block = 0;
mfb->mfb_equal_records = 0;
const SLONG record = getRecord(tdbb, i);
if (record < 0)
return false;
sort_rsb->mapData(tdbb, request, getData(tdbb, mfb, record));
}
if (recycle)
break;
}
}
if (!recycle)
break;
}
// finally compute equality group for each stream in sort/merge
for (FB_SIZE_T i = 0; i < m_args.getCount(); i++)
{
const SortedStream* const sort_rsb = m_args[i];
Impure::irsb_mrg_repeat* const tail = &impure->irsb_mrg_rpt[i];
MergeFile* const mfb = &tail->irsb_mrg_file;
UCharBuffer key;
const ULONG key_length = sort_rsb->getKeyLength();
UCHAR* const first_data = key.getBuffer(key_length);
memcpy(first_data, getData(tdbb, mfb, 0), key_length);
SLONG record;
while ((record = getRecord(tdbb, i)) >= 0)
{
const UCHAR* p = first_data;
const UCHAR* q = getData(tdbb, mfb, record);
if (!sort_rsb->compareKeys(p, q))
{
tail->irsb_mrg_last_fetched = record;
break;
}
tail->irsb_mrg_equal_end = record;
}
if (mfb->mfb_current_block)
{
if (!mfb->mfb_space)
{
MemoryPool& pool = *getDefaultMemoryPool();
mfb->mfb_space = FB_NEW_POOL(pool) TempSpace(pool, SCRATCH, false);
}
Sort::writeBlock(mfb->mfb_space, mfb->mfb_block_size * mfb->mfb_current_block,
mfb->mfb_block_data, mfb->mfb_block_size);
}
}
// Optimize cross product of equivalence groups by ordering the streams
// from left (outermost) to right (innermost) by descending cardinality
// of merge blocks. This ordering will vary for each set of equivalence
// groups and cannot be statically assigned by the optimizer.
typedef Stack<Impure::irsb_mrg_repeat*> ImrStack;
ImrStack best_tails;
Impure::irsb_mrg_repeat* tail = impure->irsb_mrg_rpt;
for (const Impure::irsb_mrg_repeat* const tail_end = tail + m_args.getCount();
tail < tail_end; tail++)
{
Impure::irsb_mrg_repeat* best_tail = NULL;
ULONG most_blocks = 0;
for (Impure::irsb_mrg_repeat* tail2 = impure->irsb_mrg_rpt; tail2 < tail_end; tail2++)
{
ImrStack::iterator stack(best_tails);
for (; stack.hasData(); ++stack)
{
if (stack.object() == tail2)
break;
}
if (stack.hasData())
continue;
MergeFile* const mfb = &tail2->irsb_mrg_file;
ULONG blocks = mfb->mfb_equal_records / mfb->mfb_blocking_factor;
if (++blocks > most_blocks)
{
most_blocks = blocks;
best_tail = tail2;
}
}
best_tails.push(best_tail);
tail->irsb_mrg_order = best_tail - impure->irsb_mrg_rpt;
}
return true;
}
bool IntlUtil::initUnicodeCollation(texttype* tt, charset* cs, const ASCII* name,
USHORT attributes, const UCharBuffer& specificAttributes, const string& configInfo)
{
memset(tt, 0, sizeof(*tt));
// name comes from stack. Copy it.
ASCII* nameCopy = FB_NEW ASCII[strlen(name) + 1];
strcpy(nameCopy, name);
tt->texttype_name = nameCopy;
tt->texttype_version = TEXTTYPE_VERSION_1;
tt->texttype_country = CC_INTL;
tt->texttype_canonical_width = 4; // UTF-32
tt->texttype_fn_destroy = unicodeDestroy;
tt->texttype_fn_compare = unicodeCompare;
tt->texttype_fn_key_length = unicodeKeyLength;
tt->texttype_fn_string_to_key = unicodeStrToKey;
tt->texttype_fn_canonical = unicodeCanonical;
IntlUtil::SpecificAttributesMap map;
Jrd::CharSet* charSet = NULL;
try
{
charSet = Jrd::CharSet::createInstance(*getDefaultMemoryPool(), 0, cs);
IntlUtil::parseSpecificAttributes(charSet, specificAttributes.getCount(),
specificAttributes.begin(), &map);
delete charSet;
}
catch (...)
{
delete charSet;
gds__log("initUnicodeCollation failed - unexpected exception caught");
return false;
}
IntlUtil::SpecificAttributesMap map16;
SpecificAttributesMap::Accessor accessor(&map);
bool found = accessor.getFirst();
while (found)
{
UCharBuffer s1, s2;
USHORT errCode;
ULONG errPosition;
s1.resize(cs->charset_to_unicode.csconvert_fn_convert(
&cs->charset_to_unicode, accessor.current()->first.length(), NULL, 0, NULL, &errCode, &errPosition));
s1.resize(cs->charset_to_unicode.csconvert_fn_convert(
&cs->charset_to_unicode, accessor.current()->first.length(), (UCHAR*) accessor.current()->first.c_str(),
s1.getCapacity(), s1.begin(), &errCode, &errPosition));
s2.resize(cs->charset_to_unicode.csconvert_fn_convert(
&cs->charset_to_unicode, accessor.current()->second.length(), NULL, 0, NULL, &errCode, &errPosition));
s2.resize(cs->charset_to_unicode.csconvert_fn_convert(
&cs->charset_to_unicode, accessor.current()->second.length(), (UCHAR*) accessor.current()->second.c_str(),
s2.getCapacity(), s2.begin(), &errCode, &errPosition));
map16.put(string((char*) s1.begin(), s1.getCount()), string((char*) s2.begin(), s2.getCount()));
found = accessor.getNext();
}
UnicodeUtil::Utf16Collation* collation =
UnicodeUtil::Utf16Collation::create(tt, attributes, map16, configInfo);
if (!collation)
{
gds__log("initUnicodeCollation failed - UnicodeUtil::Utf16Collation::create failed");
return false;
}
tt->texttype_impl = FB_NEW TextTypeImpl(cs, collation);
return true;
}
// Full processing of database name
// Returns true if alias was found in databases.conf
bool expandDatabaseName(Firebird::PathName alias,
Firebird::PathName& file,
Firebird::RefPtr<Config>* config)
{
try
{
aliasesConf().checkLoadConfig();
}
catch (const fatal_exception& ex)
{
gds__log("File databases.conf contains bad data: %s", ex.what());
Arg::Gds(isc_server_misconfigured).raise();
}
// remove whitespaces from database name
alias.trim();
ReadLockGuard guard(aliasesConf().rwLock, "expandDatabaseName");
// First of all check in databases.conf
if (resolveAlias(alias, file, config))
{
return true;
}
// Now try ISC_PATH environment variable
if (!setPath(alias, file))
{
// At this step check DatabaseAccess paths in firebird.conf
if (!resolveDatabaseAccess(alias, file))
{
// Last chance - regular filename expansion
file = alias;
ISC_systemToUtf8(file);
ISC_unescape(file);
ISC_utf8ToSystem(file);
ISC_expand_filename(file, true);
ISC_systemToUtf8(file);
ISC_escape(file);
ISC_utf8ToSystem(file);
}
}
// Search for correct config in databases.conf
if (config)
{
DbName* db = aliasesConf().dbHash.lookup(file);
#ifdef HAVE_ID_BY_NAME
if (!db)
{
UCharBuffer id;
os_utils::getUniqueFileId(file.c_str(), id);
if (id.hasData())
{
Id* i = aliasesConf().idHash.lookup(id);
if (i)
db = i->db;
}
}
#endif
*config = (db && db->config.hasData()) ? db->config : Config::getDefaultConfig();
}
return false;
}
