//-----------------------------------------------------------------------------
int KMFolder::open(void)
{
int rc = 0;
mOpenCount++;
if (mOpenCount > 1) return 0; // already open
assert(name() != "");
mFilesLocked = FALSE;
mStream = fopen(location(), "r+"); // messages file
if (!mStream)
{
debug("Cannot open folder `%s': %s", (const char*)location(),
strerror(errno));
mOpenCount = 0;
return errno;
}
if (!path().isEmpty())
{
if (isIndexOutdated()) // test if contents file has changed
{
QString str;
mIndexStream = NULL;
str.sprintf(i18n("Folder `%s' changed. Recreating index."),
(const char*)name());
emit statusMsg(str);
}
else mIndexStream = fopen(indexLocation(), "r+"); // index file
if (!mIndexStream) rc = createIndexFromContents();
else readIndex();
}
else
{
//debug("No path specified for folder `" + name() +
// "' -- Turning autoCreateIndex off");
mAutoCreateIndex = FALSE;
rc = createIndexFromContents();
}
if (!rc) lock();
mQuiet = 0;
return rc;
}
bool KMFolderIndex::recreateIndex()
{
QApplication::setOverrideCursor( QCursor( Qt::ArrowCursor ) );
KMessageBox::error(0,
i18n("The mail index for '%1' is corrupted and will be regenerated now, "
"but some information, including status flags, will be lost.", label()));
QApplication::restoreOverrideCursor();
if ( createIndexFromContents() != 0 )
return false;
return readIndex();
}
//-----------------------------------------------------------------------------
bool KMFolder::readIndexHeader(void)
{
int indexVersion;
assert(mIndexStream != NULL);
fscanf(mIndexStream, "# KMail-Index V%d\n", &indexVersion);
if (indexVersion < INDEX_VERSION)
{
debug("Index file %s is out of date. Re-creating it.",
(const char*)indexLocation());
createIndexFromContents();
return FALSE;
}
return TRUE;
}
bool KMFolderIndex::readIndexHeader(int *gv)
{
int indexVersion;
assert(mIndexStream != 0);
mIndexSwapByteOrder = false;
mIndexSizeOfLong = sizeof(long);
int ret = fscanf(mIndexStream, "# KMail-Index V%d\n", &indexVersion);
if ( ret == EOF || ret == 0 )
return false; // index file has invalid header
if(gv)
*gv = indexVersion;
if (indexVersion < 1505 ) {
if(indexVersion == 1503) {
kDebug() << "Converting old index file" << indexLocation() << "to utf-8";
mConvertToUtf8 = true;
}
return true;
} else if (indexVersion == 1505) {
} else if (indexVersion < INDEX_VERSION) {
kDebug() << "Index file" << indexLocation() << "is out of date. Re-creating it.";
createIndexFromContents();
return false;
} else if(indexVersion > INDEX_VERSION) {
QApplication::setOverrideCursor( QCursor( Qt::ArrowCursor ) );
int r = KMessageBox::questionYesNo(0,
i18n(
"The mail index for '%1' is from an unknown version of KMail (%2).\n"
"This index can be regenerated from your mail folder, but some "
"information, including status flags, may be lost. Do you wish "
"to downgrade your index file?" , objectName() , indexVersion), QString(), KGuiItem(i18n("Downgrade")), KGuiItem(i18n("Do Not Downgrade")) );
QApplication::restoreOverrideCursor();
if (r == KMessageBox::Yes)
createIndexFromContents();
return false;
}
else {
// Header
quint32 byteOrder = 0;
quint32 sizeOfLong = sizeof(long); // default
quint32 header_length = 0;
KDE_fseek(mIndexStream, sizeof(char), SEEK_CUR );
fread(&header_length, sizeof(header_length), 1, mIndexStream);
if (header_length > 0xFFFF)
header_length = kmail_swap_32(header_length);
off_t endOfHeader = KDE_ftell(mIndexStream) + header_length;
bool needs_update = true;
// Process available header parts
if (header_length >= sizeof(byteOrder))
{
fread(&byteOrder, sizeof(byteOrder), 1, mIndexStream);
mIndexSwapByteOrder = (byteOrder == 0x78563412);
header_length -= sizeof(byteOrder);
if (header_length >= sizeof(sizeOfLong))
{
fread(&sizeOfLong, sizeof(sizeOfLong), 1, mIndexStream);
if (mIndexSwapByteOrder)
sizeOfLong = kmail_swap_32(sizeOfLong);
mIndexSizeOfLong = sizeOfLong;
header_length -= sizeof(sizeOfLong);
needs_update = false;
}
}
if (needs_update || mIndexSwapByteOrder || (mIndexSizeOfLong != sizeof(long)))
setDirty( true );
// Seek to end of header
KDE_fseek(mIndexStream, endOfHeader, SEEK_SET );
if ( mIndexSwapByteOrder ) {
kDebug() << "Index File has byte order swapped!";
}
if ( mIndexSizeOfLong != sizeof( long ) ) {
kDebug() << "Index File sizeOfLong is" << mIndexSizeOfLong << "while sizeof(long) is" << sizeof(long) << "!";
}
}
return true;
}
