103 lines
2.1 KiB
C
103 lines
2.1 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 "value.h"
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#include "object.h"
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#include "state.h"
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/* FIXME: arena is consumed every time hash/cmp is executed */
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#define kh_pic_str_hash(a) (pic_str_hash(pic, obj_value(pic, (a))))
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#define kh_pic_str_equal(a,b) (pic_str_cmp(pic, obj_value(pic, (a)), obj_value(pic, (b))) == 0)
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KHASH_DEFINE(oblist, struct string *, struct symbol *, kh_pic_str_hash, kh_pic_str_equal)
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pic_value
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pic_intern(pic_state *pic, pic_value str)
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{
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khash_t(oblist) *h = &pic->oblist;
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struct symbol *sym;
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int it;
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int ret;
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it = kh_put(oblist, h, str_ptr(pic, str), &ret);
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if (ret == 0) { /* if exists */
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sym = kh_val(h, it);
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pic_protect(pic, obj_value(pic, sym));
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return obj_value(pic, sym);
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}
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kh_val(h, it) = NULL; /* dummy */
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sym = (struct symbol *)pic_obj_alloc(pic, PIC_TYPE_SYMBOL);
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sym->str = str_ptr(pic, str);
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kh_val(h, it) = sym;
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return obj_value(pic, sym);
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}
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pic_value
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pic_sym_name(pic_state *pic, pic_value sym)
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{
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return obj_value(pic, sym_ptr(pic, sym)->str);
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}
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static pic_value
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pic_symbol_symbol_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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return pic_bool_value(pic, pic_sym_p(pic, v));
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}
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static pic_value
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pic_symbol_symbol_eq_p(pic_state *pic)
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{
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int argc, i;
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pic_value *argv;
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pic_get_args(pic, "*", &argc, &argv);
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for (i = 0; i < argc; ++i) {
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if (! pic_sym_p(pic, argv[i])) {
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return pic_false_value(pic);
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}
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if (! pic_eq_p(pic, argv[i], argv[0])) {
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return pic_false_value(pic);
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}
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}
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return pic_true_value(pic);
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}
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static pic_value
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pic_symbol_symbol_to_string(pic_state *pic)
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{
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pic_value sym;
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pic_get_args(pic, "m", &sym);
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return pic_sym_name(pic, sym);
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}
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static pic_value
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pic_symbol_string_to_symbol(pic_state *pic)
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{
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pic_value str;
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pic_get_args(pic, "s", &str);
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return pic_intern(pic, str);
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}
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void
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pic_init_symbol(pic_state *pic)
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{
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pic_defun(pic, "symbol?", pic_symbol_symbol_p);
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pic_defun(pic, "symbol=?", pic_symbol_symbol_eq_p);
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pic_defun(pic, "symbol->string", pic_symbol_symbol_to_string);
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pic_defun(pic, "string->symbol", pic_symbol_string_to_symbol);
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}
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