fn_putc
fn_putc(fnp, *s++);
fn_putc(fnp, c);
fn_putc(fnp, *ptr);
void fn_putc(struct fn *fnp, int c);
fn_putc(matchfnp, '/');
fn_putc(ret, '\\');
fn_putc(ret, c);
fn_putc(ret, '.');
fn_putc(ret, '.');
fn_putc(ret, '*');
fn_putc(ret, c);
fn_putc(dst, '\\');
fn_putc(dst, c);
fn_putc(dst, '.');
fn_putc(dst, '.');
fn_putc(dst, '*');
fn_putc(dst, '\\');
fn_putc(dst, '$');
fn_putc(kw, c);
fn_putc(kw, fn_getc(src));
fn_putc(dst, '\\');
fn_putc(dst, '$');
fn_putc(dst, c);
fn_putc(fnp, ',');