On Thu, Apr 19, 2018 at 3:22 PM, Keith Medcalf <kmedc...@dessus.com> wrote:
> > Actually, nothing in the C or C++ world will "go past" the NULL byte since > the very definition of a C string is a "bunch-o-bytes that are non-zero > followed by one that is". > > that doesnt' mean you can use a custom token structure that contains both the pointer and length of the data. (which it already has) sure, using standard C api - strlen, etc sure... but sqlite uses a custom function internally sqlite3stlren30 which can easily be extended to take the length of the string; but wait, if it was saved, it wouldn't need to be called, and a overall performance gain is created. the biggest problem is really the internal function '(something)printf' which returns a char *, and has no space to return the length, like snprintf would. and I can easily put nuls into a string.... char buf[256]; int len = snprintf( buf, 256, "put a nul %c here and here %c", 0, 0 ); and the length returned would be 27. > If you want to embed non UTF8 text you should be using a BLOB not TEXT. > Text means "an array of non-zero characters terminated by a zero byte" and > a BLOB means a "bag-o-bytes" of a specific size. > > Blob means binary; havihng to deal with a binary structure to convert to a string and back is ridiculous when the interface already supports storing and getting strings with \0 in them. > Things meants to work on C "strings" should always stop at the zero > terminator. Failure to do so can lead to AHBL. > > So don't use the standard library. That was one of the first htings I created for my MUD client; a smart text string class. (I say class in the generic term, not the literal, since it was written in C) > (Note, this applies to "wide" (as in word) and "fat" (as in double word) > and obese (as in quad word) strings as well. They are a sequence of > words/double-words/quad-words/ten-words (whatever) that are non-zero > followed by one that is zero -- and the narrow/wide/fat/obese string ends > at the zeo value). > > utf8everywhere.org No reason to use wide char. get good, son. (sorry if that's overly offensive) --- > The fact that there's a Highway to Hell but only a Stairway to Heaven says > a lot about anticipated traffic volume. > _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
