本文整理汇总了C++中CharSet::minBytesPerChar方法的典型用法代码示例。如果您正苦于以下问题：C++ CharSet::minBytesPerChar方法的具体用法？C++ CharSet::minBytesPerChar怎么用？C++ CharSet::minBytesPerChar使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CharSet的用法示例。
在下文中一共展示了CharSet::minBytesPerChar方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: lookupCollation
Collation* CharSetContainer::lookupCollation(thread_db* tdbb, USHORT tt_id)
{
const USHORT id = TTYPE_TO_COLLATION(tt_id);
if (id < charset_collations.getCount() && charset_collations[id] != NULL)
{
if (!charset_collations[id]->obsolete)
return charset_collations[id];
}
Jrd::Attachment* att = tdbb->getAttachment();
Jrd::Attachment::CheckoutLockGuard guard(att, createCollationMtx, FB_FUNCTION); // do we need it ?
Collation* to_delete = NULL;
if (id < charset_collations.getCount() && charset_collations[id] != NULL)
{
if (charset_collations[id]->obsolete)
{
// if obsolete collation is not used delete it immediately,
// else wait until all references are released
if (charset_collations[id]->useCount == 0)
{
charset_collations[id]->destroy(tdbb);
delete charset_collations[id];
}
else
to_delete = charset_collations[id];
charset_collations[id] = NULL;
}
else
return charset_collations[id];
}
SubtypeInfo info;
if (MET_get_char_coll_subtype_info(tdbb, tt_id, &info))
{
CharSet* charset = INTL_charset_lookup(tdbb, TTYPE_TO_CHARSET(tt_id));
if (TTYPE_TO_CHARSET(tt_id) != CS_METADATA)
{
Firebird::UCharBuffer specificAttributes;
ULONG size = info.specificAttributes.getCount() * charset->maxBytesPerChar();
size = INTL_convert_bytes(tdbb, TTYPE_TO_CHARSET(tt_id),
specificAttributes.getBuffer(size), size,
CS_METADATA, info.specificAttributes.begin(),
info.specificAttributes.getCount(), ERR_post);
specificAttributes.shrink(size);
info.specificAttributes = specificAttributes;
}
texttype* tt = FB_NEW_POOL(*att->att_pool) texttype;
memset(tt, 0, sizeof(texttype));
if (!lookup_texttype(tt, &info))
{
delete tt;
ERR_post(Arg::Gds(isc_collation_not_installed) << Arg::Str(info.collationName) <<
Arg::Str(info.charsetName));
}
if (charset_collations.getCount() <= id)
charset_collations.grow(id + 1);
fb_assert((tt->texttype_canonical_width == 0 && tt->texttype_fn_canonical == NULL) ||
(tt->texttype_canonical_width != 0 && tt->texttype_fn_canonical != NULL));
if (tt->texttype_canonical_width == 0)
{
if (charset->isMultiByte())
tt->texttype_canonical_width = sizeof(ULONG); // UTF-32
else
{
tt->texttype_canonical_width = charset->minBytesPerChar();
// canonical is equal to string, then TEXTTYPE_DIRECT_MATCH can be turned on
tt->texttype_flags |= TEXTTYPE_DIRECT_MATCH;
}
}
charset_collations[id] = Collation::createInstance(*att->att_pool, tt_id, tt, charset);
charset_collations[id]->name = info.collationName;
// we don't need a lock in the charset
if (id != 0)
{
Lock* lock = charset_collations[id]->existenceLock =
CharSetContainer::createCollationLock(tdbb, tt_id, charset_collations[id]);
fb_assert(charset_collations[id]->useCount == 0);
fb_assert(!charset_collations[id]->obsolete);
LCK_lock(tdbb, lock, LCK_SR, LCK_WAIT);
// as we just obtained SR lock for new collation instance
// we could safely delete obsolete instance
if (to_delete)
{
to_delete->destroy(tdbb);
//.........这里部分代码省略.........