[vorbis-dev] vorbis_comment_add_tag() and Codewarrior OS X

[Scott Wheeler]

Quoting Olaf Matthes <olaf.matthes at gmx.de>: 
 
> Hi, after banging my head against the wall for quite a while I finally 
> found what crashes my code: 
>  
> Because I'm working with Codewarrior 8 on OS X I had to compile the ogg 
> / vorbis libs with CW. To do so I used the CW projects for OS 9 and 
> modified them. Howerver, they don't work as expected. 
> Everything seems to be fine, encoding & decoding works, only 
> vorbis_comment_add_tag() crashes my App on any subsequent call. I.e. I 
> can call vorbis_comment_add_tag() several times for one stream/file and 
> it works. When I deinit the encoder and init it again all calls to 
> vorbis_comment_add_tag() will crash. 
> I've tested the very same code on Win2000 and IRIX 6.5 and on both 
> platforms it works, so I'm very shure my code is okay. So my question 
> is, is there a known bug in vorbis_comment_add_tag() that makes it crash 
> on Mac OS X when using CW or is it me having overlooked anything when 
> compling the libs with CW? 
 
There's really not much there -- the full function is: 
 
void vorbis_comment_add_tag(vorbis_comment *vc, char *tag, char *contents){ 
  char *comment=alloca(strlen(tag)+strlen(contents)+2); 
  strcpy(comment, tag); 
  strcat(comment, "="); 
  strcat(comment, contents); 
  vorbis_comment_add(vc, comment); 
} 
 
i.e. it's probably crashing deeper into the code than this, as such a 
backtrace (ideally with full debugging symbols that would give a line number) 
would be helpful... 
 
-Scott 
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