Hello Sqlite users. I have a problem I can't solve. I have a C++ DLL
project in which I compile the Sqlite amalgamation code. The purpose is
to wrap the key Sqlite functions with exported functions I can call from
another C++ COM DLL. I'm using VS2003 for this because its part of a
legacy product. I've been using this project for years, updating the
Sqlite source code from time to time with no problems. I can call
functions like sqlite3_open_v2, sqlite3_prepare, sqlite3_step, etc. with
no problems. Now I'm trying to integrate the Backup API. When I call
sqlite3_backup_init it throws this error: _/"library /__/
/__/routine called out of sequence"/_. I want to step into the Sqlite
code to find out why but for some reason my debugger won't allow me to
step into the C code from my C++ code. So I'm hoping someone can help
me. Below is my C++ implementation which I modeled from the sample on
this page: sqlite.org/backup.html. My calling code is from a VB6
project which simply creates/opens a memory DB and calls the below
function (via my COM DLL). Any help is much appreciated.
Thanks,
BrettG
SQLITE_DLL_API int backup( /*sqlite3*/ void* pdb, const WCHAR
*pFilename, BOOL toFile )
{
int rc;
sqlite3 *pFileDb;
sqlite3_backup *pBackup;
sqlite3 *pTo;
sqlite3 *pFrom;
CTextConverter c(CP_UTF8);
//rc = sqlite3_open_v2( c.U2M(pFilename), &pFileDb,
SQLITE_OPEN_READWRITE, NULL);
rc = sqlite3_open( c.U2M(pFilename), &pFileDb);
if( rc==SQLITE_OK )
{
try
{
sqlite3 *pMemoryDb = (sqlite3*) pdb;
pFrom = (toFile ? pMemoryDb : pFileDb);
pTo = (toFile ? pFileDb : pMemoryDb);
// this line throws exception: "library routine called out of
sequence"
*pBackup = sqlite3_backup_init(pTo, "main", pFrom, "temp");*
if( pBackup )
{
sqlite3_backup_step(pBackup, -1);
sqlite3_backup_finish(pBackup);
}
rc = sqlite3_errcode(pTo);
sqlite3_close(pFileDb);
}
catch(...)
{
sqlite3_close(pFileDb);
const char* err = sqlite3_errmsg( (sqlite3*) pdb );
throw err;
}
}
return rc;
}
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