508 lines
12 KiB
C
508 lines
12 KiB
C
/**
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* See Copyright Notice in picrin.h
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*/
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#include "picrin.h"
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#include "picrin/extra.h"
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#include "picrin/private/object.h"
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#if PIC_USE_WRITE
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struct writer_control {
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int mode;
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int op;
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int cnt;
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pic_value shared; /* is object shared? (yes if >0) */
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pic_value labels; /* object -> int */
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};
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#define WRITE_MODE 1
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#define DISPLAY_MODE 2
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#define OP_WRITE 1
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#define OP_WRITE_SHARED 2
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#define OP_WRITE_SIMPLE 3
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static void
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writer_control_init(pic_state *pic, struct writer_control *p, int mode, int op)
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{
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p->mode = mode;
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p->op = op;
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p->cnt = 0;
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p->shared = pic_make_weak(pic);
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p->labels = pic_make_weak(pic);
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}
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static void
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traverse(pic_state *pic, pic_value obj, struct writer_control *p)
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{
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pic_value shared = p->shared;
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if (p->op == OP_WRITE_SIMPLE) {
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return;
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}
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switch (pic_type(pic, obj)) {
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case PIC_TYPE_PAIR:
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case PIC_TYPE_VECTOR:
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case PIC_TYPE_DICT: {
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if (! pic_weak_has(pic, shared, obj)) {
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/* first time */
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pic_weak_set(pic, shared, obj, pic_int_value(pic, 0));
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if (pic_pair_p(pic, obj)) {
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/* pair */
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traverse(pic, pic_car(pic, obj), p);
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traverse(pic, pic_cdr(pic, obj), p);
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} else if (pic_vec_p(pic, obj)) {
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/* vector */
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int i, len = pic_vec_len(pic, obj);
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for (i = 0; i < len; ++i) {
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traverse(pic, pic_vec_ref(pic, obj, i), p);
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}
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} else {
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/* dictionary */
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int it = 0;
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pic_value val;
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while (pic_dict_next(pic, obj, &it, NULL, &val)) {
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traverse(pic, val, p);
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}
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}
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if (p->op == OP_WRITE) {
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if (pic_int(pic, pic_weak_ref(pic, shared, obj)) == 0) {
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pic_weak_del(pic, shared, obj);
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}
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}
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} else {
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/* second time */
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pic_weak_set(pic, shared, obj, pic_int_value(pic, 1));
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}
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break;
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}
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default:
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break;
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}
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}
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static bool
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is_shared_object(pic_state *pic, pic_value obj, struct writer_control *p) {
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pic_value shared = p->shared;
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if (! pic_obj_p(pic, obj)) {
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return false;
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}
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if (! pic_weak_has(pic, shared, obj)) {
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return false;
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}
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return pic_int(pic, pic_weak_ref(pic, shared, obj)) > 0;
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}
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static void
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write_blob(pic_state *pic, pic_value blob, xFILE *file)
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{
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const unsigned char *buf;
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int len, i;
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buf = pic_blob(pic, blob, &len);
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xfprintf(pic, file, "#u8(");
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for (i = 0; i < len; ++i) {
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xfprintf(pic, file, "%d", buf[i]);
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if (i + 1 < len) {
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xfprintf(pic, file, " ");
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}
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}
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xfprintf(pic, file, ")");
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}
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static void
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write_char(pic_state *pic, pic_value ch, xFILE *file, struct writer_control *p)
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{
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char c = pic_char(pic, ch);
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if (p->mode == DISPLAY_MODE) {
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xfputc(pic, c, file);
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return;
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}
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switch (c) {
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default: xfprintf(pic, file, "#\\%c", c); break;
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case '\a': xfprintf(pic, file, "#\\alarm"); break;
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case '\b': xfprintf(pic, file, "#\\backspace"); break;
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case 0x7f: xfprintf(pic, file, "#\\delete"); break;
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case 0x1b: xfprintf(pic, file, "#\\escape"); break;
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case '\n': xfprintf(pic, file, "#\\newline"); break;
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case '\r': xfprintf(pic, file, "#\\return"); break;
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case ' ': xfprintf(pic, file, "#\\space"); break;
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case '\t': xfprintf(pic, file, "#\\tab"); break;
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}
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}
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static void
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write_str(pic_state *pic, pic_value str, xFILE *file, struct writer_control *p)
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{
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int i;
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const char *cstr = pic_str(pic, str);
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if (p->mode == DISPLAY_MODE) {
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xfprintf(pic, file, "%s", pic_str(pic, str));
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return;
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}
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xfprintf(pic, file, "\"");
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for (i = 0; i < pic_str_len(pic, str); ++i) {
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if (cstr[i] == '"' || cstr[i] == '\\') {
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xfputc(pic, '\\', file);
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}
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xfputc(pic, cstr[i], file);
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}
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xfprintf(pic, file, "\"");
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}
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static void
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write_float(pic_state *pic, pic_value flo, xFILE *file)
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{
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double f = pic_float(pic, flo);
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if (f != f) {
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xfprintf(pic, file, "+nan.0");
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} else if (f == 1.0 / 0.0) {
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xfprintf(pic, file, "+inf.0");
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} else if (f == -1.0 / 0.0) {
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xfprintf(pic, file, "-inf.0");
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} else {
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xfprintf(pic, file, "%f", f);
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}
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}
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static void write_core(pic_state *, pic_value, xFILE *, struct writer_control *);
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static void
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write_pair_help(pic_state *pic, pic_value pair, xFILE *file, struct writer_control *p)
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{
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pic_value cdr = pic_cdr(pic, pair);
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write_core(pic, pic_car(pic, pair), file, p);
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if (pic_nil_p(pic, cdr)) {
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return;
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}
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else if (pic_pair_p(pic, cdr) && ! is_shared_object(pic, cdr, p)) {
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xfprintf(pic, file, " ");
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write_pair_help(pic, cdr, file, p);
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}
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else {
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xfprintf(pic, file, " . ");
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write_core(pic, cdr, file, p);
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}
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}
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#define EQ(sym, lit) (strcmp(pic_sym(pic, sym), lit) == 0)
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static void
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write_pair(pic_state *pic, pic_value pair, xFILE *file, struct writer_control *p)
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{
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pic_value tag;
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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))) {
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tag = pic_car(pic, pair);
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if (EQ(tag, "quote")) {
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xfprintf(pic, file, "'");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "unquote")) {
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xfprintf(pic, file, ",");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "unquote-splicing")) {
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xfprintf(pic, file, ",@");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "quasiquote")) {
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xfprintf(pic, file, "`");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "syntax-quote")) {
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xfprintf(pic, file, "#'");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "syntax-unquote")) {
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xfprintf(pic, file, "#,");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "syntax-unquote-splicing")) {
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xfprintf(pic, file, "#,@");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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else if (EQ(tag, "syntax-quasiquote")) {
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xfprintf(pic, file, "#`");
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write_core(pic, pic_cadr(pic, pair), file, p);
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return;
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}
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}
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xfprintf(pic, file, "(");
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write_pair_help(pic, pair, file, p);
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xfprintf(pic, file, ")");
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}
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static void
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write_vec(pic_state *pic, pic_value vec, xFILE *file, struct writer_control *p)
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{
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int i, len = pic_vec_len(pic, vec);
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xfprintf(pic, file, "#(");
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for (i = 0; i < len; ++i) {
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write_core(pic, pic_vec_ref(pic, vec, i), file, p);
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if (i + 1 < len) {
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xfprintf(pic, file, " ");
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}
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}
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xfprintf(pic, file, ")");
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}
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static void
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write_dict(pic_state *pic, pic_value dict, xFILE *file, struct writer_control *p)
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{
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pic_value key, val;
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int it = 0;
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xfprintf(pic, file, "#.(dictionary");
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while (pic_dict_next(pic, dict, &it, &key, &val)) {
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xfprintf(pic, file, " '%s ", pic_sym(pic, key));
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write_core(pic, val, file, p);
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}
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xfprintf(pic, file, ")");
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}
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static void
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write_core(pic_state *pic, pic_value obj, xFILE *file, struct writer_control *p)
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{
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pic_value labels = p->labels;
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int i;
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/* shared objects */
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if (is_shared_object(pic, obj, p)) {
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if (pic_weak_has(pic, labels, obj)) {
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xfprintf(pic, file, "#%d#", pic_int(pic, pic_weak_ref(pic, labels, obj)));
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return;
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}
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i = p->cnt++;
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xfprintf(pic, file, "#%d=", i);
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pic_weak_set(pic, labels, obj, pic_int_value(pic, i));
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}
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switch (pic_type(pic, obj)) {
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case PIC_TYPE_UNDEF:
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xfprintf(pic, file, "#undefined");
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break;
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case PIC_TYPE_NIL:
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xfprintf(pic, file, "()");
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break;
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case PIC_TYPE_TRUE:
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xfprintf(pic, file, "#t");
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break;
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case PIC_TYPE_FALSE:
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xfprintf(pic, file, "#f");
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break;
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case PIC_TYPE_ID:
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xfprintf(pic, file, "#<identifier %s>", pic_str(pic, pic_id_name(pic, obj)));
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break;
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case PIC_TYPE_EOF:
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xfprintf(pic, file, "#.(eof-object)");
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break;
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case PIC_TYPE_INT:
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xfprintf(pic, file, "%d", pic_int(pic, obj));
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break;
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case PIC_TYPE_SYMBOL:
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xfprintf(pic, file, "%s", pic_sym(pic, obj));
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break;
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case PIC_TYPE_FLOAT:
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write_float(pic, obj, file);
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break;
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case PIC_TYPE_BLOB:
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write_blob(pic, obj, file);
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break;
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case PIC_TYPE_CHAR:
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write_char(pic, obj, file, p);
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break;
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case PIC_TYPE_STRING:
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write_str(pic, obj, file, p);
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break;
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case PIC_TYPE_PAIR:
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write_pair(pic, obj, file, p);
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break;
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case PIC_TYPE_VECTOR:
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write_vec(pic, obj, file, p);
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break;
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case PIC_TYPE_DICT:
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write_dict(pic, obj, file, p);
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break;
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default:
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xfprintf(pic, file, "#<%s %p>", pic_typename(pic, pic_type(pic, obj)), pic_obj_ptr(obj));
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break;
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}
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if (p->op == OP_WRITE) {
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if (is_shared_object(pic, obj, p)) {
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pic_weak_del(pic, labels, obj);
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}
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}
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}
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static void
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write(pic_state *pic, pic_value obj, xFILE *file, int mode, int op)
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{
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struct writer_control p;
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writer_control_init(pic, &p, mode, op);
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traverse(pic, obj, &p);
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write_core(pic, obj, file, &p);
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}
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void
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pic_vfprintf(pic_state *pic, pic_value port, const char *fmt, va_list ap)
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{
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xFILE *file = pic_fileno(pic, port);
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char c;
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while ((c = *fmt++) != '\0') {
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switch (c) {
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default:
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xfputc(pic, c, file);
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break;
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case '%':
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c = *fmt++;
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if (! c)
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goto exit;
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switch (c) {
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default:
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xfputc(pic, c, file);
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break;
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case '%':
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xfputc(pic, '%', file);
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break;
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case 'c':
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xfprintf(pic, file, "%c", va_arg(ap, int));
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break;
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case 's':
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xfprintf(pic, file, "%s", va_arg(ap, const char *));
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break;
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case 'd':
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xfprintf(pic, file, "%d", va_arg(ap, int));
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break;
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case 'p':
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xfprintf(pic, file, "%p", va_arg(ap, void *));
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break;
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case 'f':
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xfprintf(pic, file, "%f", va_arg(ap, double));
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break;
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}
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break;
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case '~':
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c = *fmt++;
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if (! c)
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goto exit;
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switch (c) {
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default:
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xfputc(pic, c, file);
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break;
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case '~':
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xfputc(pic, '~', file);
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break;
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case '%':
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xfputc(pic, '\n', file);
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break;
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case 'a':
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write(pic, va_arg(ap, pic_value), file, DISPLAY_MODE, OP_WRITE);
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break;
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case 's':
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write(pic, va_arg(ap, pic_value), file, WRITE_MODE, OP_WRITE);
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break;
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}
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break;
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}
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}
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exit:
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xfflush(pic, file);
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}
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void
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pic_fprintf(pic_state *pic, pic_value port, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pic_vfprintf(pic, port, fmt, ap);
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va_end(ap);
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}
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void
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pic_printf(pic_state *pic, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pic_vfprintf(pic, pic_stdout(pic), fmt, ap);
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va_end(ap);
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}
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static pic_value
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pic_write_write(pic_state *pic)
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{
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pic_value v, port = pic_stdout(pic);
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pic_get_args(pic, "o|p", &v, &port);
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write(pic, v, pic_fileno(pic, port), WRITE_MODE, OP_WRITE);
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return pic_undef_value(pic);
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}
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static pic_value
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pic_write_write_simple(pic_state *pic)
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{
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pic_value v, port = pic_stdout(pic);
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pic_get_args(pic, "o|p", &v, &port);
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write(pic, v, pic_fileno(pic, port), WRITE_MODE, OP_WRITE_SIMPLE);
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return pic_undef_value(pic);
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}
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static pic_value
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pic_write_write_shared(pic_state *pic)
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{
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pic_value v, port = pic_stdout(pic);
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pic_get_args(pic, "o|p", &v, &port);
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write(pic, v, pic_fileno(pic, port), WRITE_MODE, OP_WRITE_SHARED);
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return pic_undef_value(pic);
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}
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static pic_value
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pic_write_display(pic_state *pic)
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{
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pic_value v, port = pic_stdout(pic);
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pic_get_args(pic, "o|p", &v, &port);
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write(pic, v, pic_fileno(pic, port), DISPLAY_MODE, OP_WRITE);
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return pic_undef_value(pic);
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}
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void
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pic_init_write(pic_state *pic)
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{
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pic_defun(pic, "write", pic_write_write);
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pic_defun(pic, "write-simple", pic_write_write_simple);
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pic_defun(pic, "write-shared", pic_write_write_shared);
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pic_defun(pic, "display", pic_write_display);
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}
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#endif
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