Yes, str and str2 are Unicode string, 2 bytes per character. lPos counts per character, not byte, so if the string in the database is abcde and I want to find the first position of d in that string then lPos will be 4.
> You are converting in one direction (SQLite to VB), but not in the other I thought SQLite would handle VB Unicode strings to UTF8 strings, but I think you may be onto something there, because if I move VB Unicode strings to SQLite I do sqlite3_bind_text16 and I understand sqlite3_result_text is very similar to sqlite3_bind_text. So, it makes sense I need sqlite3_result_text16 instead. Will do some further testing. RBS On Tue, Dec 15, 2015 at 12:22 AM, Igor Tandetnik <igor at tandetnik.org> wrote: > On 12/14/2015 5:46 PM, Bart Smissaert wrote: > >> OK, thanks, will have to study this carefully. >> So, if I understand you well then the way I do it now I would need >> sqlite3_free? >> > > First, I don't know how you do it now - you've never described that. > Second, I have not ever said you needed sqlite3_free; nothing in your > description of the problem so far suggests you need it. > > 'string not found, so return original field string >> '------------------------------------------------- >> 140 If lPos = 0 Then >> 150 sqlite3_result_value lPtr_ObjContext, lPtr1 >> 160 Exit Sub >> 170 End If >> 180 sqlite3_result_text lPtr_ObjContext, StrPtr(str), _ >> (lPos - 2) * 2, SQLITE_TRANSIENT >> > > To the extent I understand what's going on (I'm not really familiar with > VB, so I'm taking and educated guess for the most part), the memory > management part looks OK to me. > > However, I have doubts about encoding. Comments seem to suggest str points > to a Unicode string; also the fact that you multiply lPos by 2. But > sqlite3_result_text expects UTF-8 string. You are converting in one > direction (SQLite to VB), but not in the other, as far as I can tell. I > suspect you need sqlite3_result_text16 instead. > > Also lPos-2 looks wrong. Can't the substring be found at lPos == 1 ? > > -- > Igor Tandetnik > > _______________________________________________ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >
