void
merge_pathnames( COStream out, boolean just_dir,
const char* dpath, const char* npath, const char* tpath ) {
/* create a pathname by taking the directory from the first argument,
the name from the second, and the extension from the third. */
const char* dname;
const char* nname;
const char* ntype;
const char* p;
ntype = pathname_type(npath);
if ( is_absolute_pathname(npath) || dpath == NULL || dpath[0] == '\0' )
nname = npath;
else {
nname = pathname_name_and_type(npath);
if ( just_dir ) {
cos_puts(out,dpath);
if ( cos_prevch(out) != DirDelim )
cos_putch(out,DirDelim);
}
else {
dname = pathname_name_and_type(dpath);
for ( p = dpath ; p < dname ; p++ )
cos_putch(out,*p);
}
}
if ( ntype == NULL )
cos_puts(out,nname);
else
for ( p = nname ; p < ntype ; p++ )
cos_putch(out,*p);
p = NULL;
if ( tpath != NULL ) {
p = pathname_type(tpath);
if ( p == NULL && tpath[0] != '\0' && strchr(tpath,DirDelim)==NULL )
p = tpath;
}
if ( p == NULL )
p = ntype;
if ( p != NULL ) {
if ( cos_prevch(out) != '.' )
cos_putch(out,'.');
cos_puts(out, p);
}
}
std::string operator()(const std::string &pathname) {
return make_pathname(new_directory,
pathname_name(pathname),
pathname_type(pathname));
}
