示例#1
0
/*
 * computes a checksum (we call it fingerprint) on all the catalog-keys. We do
 * not include the values, since we want catalogs for different languages of the
 * same app to have the same fingerprint, since we use it to separate different
 * catalog-versions. We use a simple sum because there is no well known
 * checksum algorithm that gives the same result if the string are sorted in the
 * wrong order, and this does happen, as an hash map is an unsorted container.
 */
uint32
BHashMapCatalog::ComputeFingerprint() const
{
	uint32 checksum = 0;

	int32 hash;
	CatMap::Iterator iter = fCatMap.GetIterator();
	CatMap::Entry entry;
	while (iter.HasNext())
	{
		entry = iter.Next();
		hash = entry.key.fHashVal;
		checksum += hash;
	}
	return checksum;
}
示例#2
0
status_t
DefaultCatalog::Flatten(BDataIO *dataIO)
{
	UpdateFingerprint();
		// make sure we have the correct fingerprint before we flatten it

	status_t res;
	BMessage archive;
	int32 count = fCatMap.Size();
	res = archive.AddString("class", "DefaultCatalog");
	if (res == B_OK)
		res = archive.AddInt32("c:sz", count);
	if (res == B_OK)
		res = archive.AddInt16("c:ver", kCatArchiveVersion);
	if (res == B_OK)
		res = archive.AddString("c:lang", fLanguageName.String());
	if (res == B_OK)
		res = archive.AddString("c:sig", fSignature.String());
	if (res == B_OK)
		res = archive.AddInt32("c:fpr", fFingerprint);
	if (res == B_OK)
		res = archive.Flatten(dataIO);

	CatMap::Iterator iter = fCatMap.GetIterator();
	CatMap::Entry entry;
	while (res == B_OK && iter.HasNext()) {
		entry = iter.Next();
		archive.MakeEmpty();
		res = archive.AddString("c:ostr", entry.key.fString.String());
		if (res == B_OK)
			res = archive.AddString("c:ctxt", entry.key.fContext.String());
		if (res == B_OK)
			res = archive.AddString("c:comt", entry.key.fComment.String());
		if (res == B_OK)
			res = archive.AddInt32("c:hash", entry.key.fHashVal);
		if (res == B_OK)
			res = archive.AddString("c:tstr", entry.value.String());
		if (res == B_OK)
			res = archive.Flatten(dataIO);
	}

	return res;
}