109 lines
2.0 KiB
C
109 lines
2.0 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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KHASH_DEFINE(s, const char *, pic_sym *, kh_str_hash_func, kh_str_hash_equal)
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pic_sym *
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pic_intern(pic_state *pic, pic_str *str)
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{
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return pic_intern_cstr(pic, pic_str_cstr(pic, str));
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}
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pic_sym *
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pic_intern_cstr(pic_state *pic, const char *cstr)
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{
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khash_t(s) *h = &pic->syms;
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pic_sym *sym;
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khiter_t it;
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int ret;
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char *copy;
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it = kh_put(s, h, cstr, &ret);
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if (ret == 0) { /* if exists */
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sym = kh_val(h, it);
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pic_gc_protect(pic, pic_obj_value(sym));
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return sym;
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}
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copy = pic_malloc(pic, strlen(cstr) + 1);
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strcpy(copy, cstr);
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kh_key(h, it) = copy;
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kh_val(h, it) = pic->sQUOTE; /* insert dummy */
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sym = (pic_sym *)pic_obj_alloc(pic, sizeof(pic_sym), PIC_TT_SYMBOL);
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sym->cstr = copy;
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kh_val(h, it) = sym;
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return sym;
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}
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const char *
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pic_symbol_name(pic_state PIC_UNUSED(*pic), pic_sym *sym)
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{
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return sym->cstr;
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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_sym_p(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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size_t 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(argv[i])) {
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return pic_false_value();
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}
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if (! pic_eq_p(argv[i], argv[0])) {
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return pic_false_value();
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}
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}
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return pic_true_value();
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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_sym *sym;
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pic_get_args(pic, "m", &sym);
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return pic_obj_value(pic_make_str_cstr(pic, sym->cstr));
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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_str *str;
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pic_get_args(pic, "s", &str);
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return pic_obj_value(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->string", pic_symbol_symbol_to_string);
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pic_defun(pic, "string->symbol", pic_symbol_string_to_symbol);
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pic_defun(pic, "symbol=?", pic_symbol_symbol_eq_p);
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}
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