400 lines
8.4 KiB
C
400 lines
8.4 KiB
C
/*
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* $Id: prim.c,v 1.7 2005-09-20 12:06:51 bacon Exp $
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*/
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#include <xp/lsp/lsp.h>
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#include <xp/lsp/mem.h>
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#include <xp/lsp/prim.h>
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#include <xp/bas/string.h>
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#include <xp/bas/assert.h>
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static int __add_prim (xp_lsp_mem_t* mem,
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const xp_char_t* name, xp_size_t len, xp_lsp_prim_t prim);
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int xp_lsp_add_prim (
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xp_lsp_t* lsp, const xp_char_t* name, xp_lsp_prim_t prim)
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{
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return __add_prim (lsp->mem, name, xp_strlen(name), prim);
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}
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int xp_lsp_remove_prim (xp_lsp_t* lsp, const xp_char_t* name)
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{
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// TODO:
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return -1;
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}
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static int __add_prim (xp_lsp_mem_t* mem,
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const xp_char_t* name, xp_size_t len, xp_lsp_prim_t prim)
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{
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xp_lsp_obj_t* n, * p;
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n = xp_lsp_make_symbolx (mem, name, len);
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if (n == XP_NULL) return -1;
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xp_lsp_lock (n);
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p = xp_lsp_make_prim (mem, prim);
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if (p == XP_NULL) return -1;
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xp_lsp_unlock (n);
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if (xp_lsp_set_func(mem, n, p) == XP_NULL) return -1;
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return 0;
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}
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xp_lsp_obj_t* xp_lsp_prim_abort (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 0, 0);
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lsp->errnum = XP_LSP_ERR_ABORT;
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return XP_NULL;
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}
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xp_lsp_obj_t* xp_lsp_prim_eval (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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xp_lsp_obj_t* tmp;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 1, 1);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (tmp == XP_NULL) return XP_NULL;
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tmp = xp_lsp_eval (lsp, tmp);
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if (tmp == XP_NULL) return XP_NULL;
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return tmp;
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}
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xp_lsp_obj_t* xp_lsp_prim_gc (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 0, 0);
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xp_lsp_garbage_collect (lsp->mem);
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return lsp->mem->nil;
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}
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xp_lsp_obj_t* xp_lsp_prim_cond (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (cond
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* (condition1 result1)
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* (consition2 result2)
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* ...
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* (t resultN))
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*/
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xp_lsp_obj_t* tmp, * ret;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 0, XP_LSP_PRIM_MAX_ARG_COUNT);
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while (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS) {
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if (XP_LSP_TYPE(XP_LSP_CAR(args)) != XP_LSP_OBJ_CONS) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(XP_LSP_CAR(args)));
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if (tmp == XP_NULL) return XP_NULL;
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if (tmp != lsp->mem->nil) {
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tmp = XP_LSP_CDR(XP_LSP_CAR(args));
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ret = lsp->mem->nil;
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while (XP_LSP_TYPE(tmp) == XP_LSP_OBJ_CONS) {
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ret = xp_lsp_eval (lsp, XP_LSP_CAR(tmp));
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if (ret == XP_NULL) return XP_NULL;
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tmp = XP_LSP_CDR(tmp);
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}
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if (tmp != lsp->mem->nil) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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return ret;
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}
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args = XP_LSP_CDR(args);
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}
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return lsp->mem->nil;
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}
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xp_lsp_obj_t* xp_lsp_prim_if (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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xp_lsp_obj_t* tmp;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 2, XP_LSP_PRIM_MAX_ARG_COUNT);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (tmp == XP_NULL) return XP_NULL;
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if (tmp != lsp->mem->nil) {
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(XP_LSP_CDR(args)));
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if (tmp == XP_NULL) return XP_NULL;
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return tmp;
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}
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else {
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xp_lsp_obj_t* res = lsp->mem->nil;
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tmp = XP_LSP_CDR(XP_LSP_CDR(args));
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while (XP_LSP_TYPE(tmp) == XP_LSP_OBJ_CONS) {
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res = xp_lsp_eval (lsp, XP_LSP_CAR(tmp));
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if (res == XP_NULL) return XP_NULL;
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tmp = XP_LSP_CDR(tmp);
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}
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if (tmp != lsp->mem->nil) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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return res;
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}
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}
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xp_lsp_obj_t* xp_lsp_prim_while (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (setq a 1)
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* (while (< a 100) (setq a (+ a 1)))
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*/
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xp_lsp_obj_t* tmp;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 1, XP_LSP_PRIM_MAX_ARG_COUNT);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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for (;;) {
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (tmp == XP_NULL) return XP_NULL;
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if (tmp == lsp->mem->nil) break;
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tmp = XP_LSP_CDR(args);
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while (XP_LSP_TYPE(tmp) == XP_LSP_OBJ_CONS) {
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if (xp_lsp_eval(lsp, XP_LSP_CAR(tmp)) == XP_NULL)
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return XP_NULL;
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tmp = XP_LSP_CDR(tmp);
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}
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if (tmp != lsp->mem->nil) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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}
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return lsp->mem->nil;
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}
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xp_lsp_obj_t* xp_lsp_prim_car (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (car '(10 20 30))
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*/
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xp_lsp_obj_t* tmp;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 1, 1);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (tmp == XP_NULL) return XP_NULL;
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if (tmp == lsp->mem->nil) return lsp->mem->nil;
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if (XP_LSP_TYPE(tmp) != XP_LSP_OBJ_CONS) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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return XP_LSP_CAR(tmp);
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}
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xp_lsp_obj_t* xp_lsp_prim_cdr (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (cdr '(10 20 30))
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*/
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xp_lsp_obj_t* tmp;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 1, 1);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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tmp = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (tmp == XP_NULL) return XP_NULL;
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if (tmp == lsp->mem->nil) return lsp->mem->nil;
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if (XP_LSP_TYPE(tmp) != XP_LSP_OBJ_CONS) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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return XP_LSP_CDR(tmp);
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}
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xp_lsp_obj_t* xp_lsp_prim_cons (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (cons 10 20)
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* (cons '(10 20) 30)
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*/
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xp_lsp_obj_t* car, * cdr, * cons;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 2, 2);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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car = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (car == XP_NULL) return XP_NULL;
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cdr = xp_lsp_eval (lsp, XP_LSP_CAR(XP_LSP_CDR(args)));
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if (cdr == XP_NULL) return XP_NULL;
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cons = xp_lsp_make_cons (lsp->mem, car, cdr);
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if (cons == XP_NULL) {
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lsp->errnum = XP_LSP_ERR_MEM;
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return XP_NULL;
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}
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return cons;
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}
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xp_lsp_obj_t* xp_lsp_prim_set (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (set 'flowers 'rose)
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* (set flowers 20)
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* (rose)
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*/
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xp_lsp_obj_t* p1, * p2;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 2, 2);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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p1 = xp_lsp_eval (lsp, XP_LSP_CAR(args));
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if (p1 == XP_NULL) return XP_NULL;
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if (XP_LSP_TYPE(p1) != XP_LSP_OBJ_SYMBOL) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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p2 = xp_lsp_eval (lsp, XP_LSP_CAR(XP_LSP_CDR(args)));
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if (p2 == XP_NULL) return XP_NULL;
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if (xp_lsp_set_value (lsp->mem, p1, p2) == XP_NULL) {
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lsp->errnum = XP_LSP_ERR_MEM;
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return XP_NULL;
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}
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return p2;
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}
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xp_lsp_obj_t* xp_lsp_prim_setq (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (setq x 10)
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* (setq x "stirng")
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*/
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xp_lsp_obj_t* p = args, * p1, * p2 = lsp->mem->nil;
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while (p != lsp->mem->nil) {
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xp_assert (XP_LSP_TYPE(p) == XP_LSP_OBJ_CONS);
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p1 = XP_LSP_CAR(p);
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if (XP_LSP_TYPE(p1) != XP_LSP_OBJ_SYMBOL) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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if (XP_LSP_TYPE(XP_LSP_CDR(p)) != XP_LSP_OBJ_CONS) {
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lsp->errnum = XP_LSP_ERR_TOO_FEW_ARGS;
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return XP_NULL;
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}
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p2 = xp_lsp_eval (lsp, XP_LSP_CAR(XP_LSP_CDR(p)));
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if (p2 == XP_NULL) return XP_NULL;
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if (xp_lsp_set_value (lsp->mem, p1, p2) == XP_NULL) {
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lsp->errnum = XP_LSP_ERR_MEM;
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return XP_NULL;
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}
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p = XP_LSP_CDR(XP_LSP_CDR(p));
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}
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return p2;
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}
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xp_lsp_obj_t* xp_lsp_prim_quote (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (quote (10 20 30 50))
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*/
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 1, 1);
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xp_assert (XP_LSP_TYPE(args) == XP_LSP_OBJ_CONS);
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return XP_LSP_CAR(args);
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}
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xp_lsp_obj_t* xp_lsp_prim_defun (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (defun x (a b) (+ a b 100))
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* (x 40 50)
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*
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* (setq x (lambda (x y) (setq temp 10) (+ x y temp)))
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* (x 40 50)
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* temp
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*/
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xp_lsp_obj_t* name, * fun;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 3, XP_LSP_PRIM_MAX_ARG_COUNT);
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name = XP_LSP_CAR(args);
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if (XP_LSP_TYPE(name) != XP_LSP_OBJ_SYMBOL) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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fun = xp_lsp_make_func (lsp->mem,
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XP_LSP_CAR(XP_LSP_CDR(args)), XP_LSP_CDR(XP_LSP_CDR(args)));
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if (fun == XP_NULL) return XP_NULL;
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if (xp_lsp_set_func (lsp->mem, XP_LSP_CAR(args), fun) == XP_NULL) {
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lsp->errnum = XP_LSP_ERR_MEM;
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return XP_NULL;
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}
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return fun;
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}
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xp_lsp_obj_t* xp_lsp_prim_demac (xp_lsp_t* lsp, xp_lsp_obj_t* args)
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{
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/*
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* (demac x (abc) x y z)
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*(setq x (macro (abc) x y z))
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*/
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xp_lsp_obj_t* name, * mac;
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XP_LSP_PRIM_CHECK_ARG_COUNT (lsp, args, 3, XP_LSP_PRIM_MAX_ARG_COUNT);
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name = XP_LSP_CAR(args);
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if (XP_LSP_TYPE(name) != XP_LSP_OBJ_SYMBOL) {
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lsp->errnum = XP_LSP_ERR_BAD_ARG;
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return XP_NULL;
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}
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mac = xp_lsp_make_macro (lsp->mem,
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XP_LSP_CAR(XP_LSP_CDR(args)), XP_LSP_CDR(XP_LSP_CDR(args)));
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if (mac == XP_NULL) return XP_NULL;
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if (xp_lsp_set_func (lsp->mem, XP_LSP_CAR(args), mac) == XP_NULL) {
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lsp->errnum = XP_LSP_ERR_MEM;
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return XP_NULL;
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}
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return mac;
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}
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