static void
write_pair(struct writer_control *p, struct pic_pair *pair)
{
pic_state *pic = p->pic;
xFILE *file = p->file;
pic_sym *tag;
if (pic_pair_p(pair->cdr) && pic_nil_p(pic_cdr(pic, pair->cdr)) && pic_sym_p(pair->car)) {
tag = pic_sym_ptr(pair->car);
if (tag == pic->sQUOTE) {
xfprintf(pic, file, "'");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sUNQUOTE) {
xfprintf(pic, file, ",");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sUNQUOTE_SPLICING) {
xfprintf(pic, file, ",@");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sQUASIQUOTE) {
xfprintf(pic, file, "`");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sSYNTAX_QUOTE) {
xfprintf(pic, file, "#'");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sSYNTAX_UNQUOTE) {
xfprintf(pic, file, "#,");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sSYNTAX_UNQUOTE_SPLICING) {
xfprintf(pic, file, "#,@");
write_core(p, pic_car(pic, pair->cdr));
return;
}
else if (tag == pic->sSYNTAX_QUASIQUOTE) {
xfprintf(pic, file, "#`");
write_core(p, pic_car(pic, pair->cdr));
return;
}
}
xfprintf(pic, file, "(");
write_pair_help(p, pair);
xfprintf(pic, file, ")");
}
static void
write_pair(pic_state *pic, pic_value pair, pic_value port, struct writer_control *p)
{
pic_value tag;
if (pic_pair_p(pic, pic_cdr(pic, pair)) && pic_nil_p(pic, pic_cddr(pic, pair)) && pic_sym_p(pic, pic_car(pic, pair))) {
tag = pic_car(pic, pair);
if (EQ(tag, "quote")) {
pic_fprintf(pic, port, "'");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "unquote")) {
pic_fprintf(pic, port, ",");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "unquote-splicing")) {
pic_fprintf(pic, port, ",@");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "quasiquote")) {
pic_fprintf(pic, port, "`");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "syntax-quote")) {
pic_fprintf(pic, port, "#'");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "syntax-unquote")) {
pic_fprintf(pic, port, "#,");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "syntax-unquote-splicing")) {
pic_fprintf(pic, port, "#,@");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
else if (EQ(tag, "syntax-quasiquote")) {
pic_fprintf(pic, port, "#`");
write_core(pic, pic_cadr(pic, pair), port, p);
return;
}
}
pic_fprintf(pic, port, "(");
write_pair_help(pic, pair, port, p);
pic_fprintf(pic, port, ")");
}
static void
write_pair_help(struct writer_control *p, struct pic_pair *pair)
{
pic_state *pic = p->pic;
khash_t(l) *lh = &p->labels;
khash_t(v) *vh = &p->visited;
khiter_t it;
int ret;
write_core(p, pair->car);
if (pic_nil_p(pair->cdr)) {
return;
}
else if (pic_pair_p(pair->cdr)) {
/* shared objects */
if ((it = kh_get(l, lh, pic_ptr(pair->cdr))) != kh_end(lh) && kh_val(lh, it) != -1) {
xfprintf(pic, p->file, " . ");
kh_put(v, vh, pic_ptr(pair->cdr), &ret);
if (ret == 0) { /* if exists */
xfprintf(pic, p->file, "#%d#", kh_val(lh, it));
return;
}
xfprintf(pic, p->file, "#%d=", kh_val(lh, it));
}
else {
xfprintf(pic, p->file, " ");
}
write_pair_help(p, pic_pair_ptr(pair->cdr));
if (p->op == OP_WRITE) {
if ((it = kh_get(l, lh, pic_ptr(pair->cdr))) != kh_end(lh) && kh_val(lh, it) != -1) {
it = kh_get(v, vh, pic_ptr(pair->cdr));
kh_del(v, vh, it);
}
}
return;
}
else {
xfprintf(pic, p->file, " . ");
write_core(p, pair->cdr);
}
}
static void
write_pair_help(pic_state *pic, pic_value pair, pic_value port, struct writer_control *p)
{
pic_value cdr = pic_cdr(pic, pair);
write_core(pic, pic_car(pic, pair), port, p);
if (pic_nil_p(pic, cdr)) {
return;
}
else if (pic_pair_p(pic, cdr) && ! is_shared_object(pic, cdr, p)) {
pic_fprintf(pic, port, " ");
write_pair_help(pic, cdr, port, p);
}
else {
pic_fprintf(pic, port, " . ");
write_core(pic, cdr, port, p);
}
}
