/* Get the global comment string of the ZipFile, in the szComment buffer. uSizeBuf is the size of the szComment buffer. return the number of byte copied or an error code <0  */
int ZEXPORT unzGetGlobalComment(unzFile file, char *szComment, uLong uSizeBuf)
/* Get the global comment string of the ZipFile, in the szComment buffer. uSizeBuf is the size of the szComment buffer. return the number of byte copied or an error code <0  */
int ZEXPORT unzGetGlobalComment(unzFile file, char *szComment, uLong uSizeBuf)
{
    unz64_s* s;
    uLong uReadThis ;
    if (file==NULL)
        return (int)UNZ_PARAMERROR;
    s=(unz64_s*)file;
    uReadThis = uSizeBuf;
    if (uReadThis>s->gi.size_comment)
        uReadThis = s->gi.size_comment;
    if (ZSEEK64(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0)
        return UNZ_ERRNO;
    if (uReadThis>0)
    {
      *szComment='\0';
      if (ZREAD64(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis)
        return UNZ_ERRNO;
    }
    if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
        *(szComment+s->gi.size_comment)='\0';
    return (int)uReadThis;
}