312 lines
9.8 KiB
C
312 lines
9.8 KiB
C
#include <stdlib.h>
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#include <float.h>
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#include "lang.h"
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#include "main.h"
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void lenv_add_builtin(lenv* env, char* sym, lbuiltin func) {
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lval* symval = lval_sym(sym);
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lval* funcval = lval_builtin(func, sym);
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lenv_put(env, symval, funcval);
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lval_delete(symval);
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lval_delete(funcval);
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}
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void lenv_add_builtin_funcs(lenv* env) {
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//Math functions
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lenv_add_builtin(env, "+", builtin_add);
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lenv_add_builtin(env, "-", builtin_sub);
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lenv_add_builtin(env, "/", builtin_div);
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lenv_add_builtin(env, "*", builtin_mul);
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lenv_add_builtin(env, "^", builtin_pow);
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//Comparison functions
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lenv_add_builtin(env, ">", builtin_comp_gt);
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lenv_add_builtin(env, "<", builtin_comp_lt);
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lenv_add_builtin(env, ">=", builtin_comp_ge);
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lenv_add_builtin(env, "<=", builtin_comp_le);
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lenv_add_builtin(env, "==", builtin_comp_eq);
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lenv_add_builtin(env, "!=", builtin_comp_neq);
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//List/Util functions
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lenv_add_builtin(env, "list", builtin_list);
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lenv_add_builtin(env, "eval", builtin_eval);
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lenv_add_builtin(env, "join", builtin_join);
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lenv_add_builtin(env, "head", builtin_head);
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lenv_add_builtin(env, "tail", builtin_tail);
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//ENV Functions
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lenv_add_builtin(env, "def", builtin_def);
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lenv_add_builtin(env, "var", builtin_var);
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lenv_add_builtin(env, "listenv", builtin_listenv);
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lenv_add_builtin(env, "exit", builtin_exit);
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lenv_add_builtin(env, "lambda", builtin_lambda);
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lenv_add_builtin(env, "\\", builtin_lambda);
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}
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char* builtin_op_strname(BUILTIN_OP_TYPE op) {
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switch(op) {
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// Operators
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case BUILTIN_OP_ADD: return "+";
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case BUILTIN_OP_SUB: return "-";
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case BUILTIN_OP_MUL: return "*";
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case BUILTIN_OP_DIV: return "/";
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case BUILTIN_OP_POW: return "^";
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// Comparisons
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case BUILTIN_COMP_GT: return ">";
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case BUILTIN_COMP_LT: return "<";
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case BUILTIN_COMP_GE: return ">=";
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case BUILTIN_COMP_LE: return "<=";
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case BUILTIN_COMP_EQ: return "==";
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case BUILTIN_COMP_NEQ: return "!=";
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default: return "UNKNOWN";
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}
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}
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//Start Math Functions
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lval* builtin_op(lenv* env, lval* val, BUILTIN_OP_TYPE op) {
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//Ensure numbers only
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for(int i = 0; i < val->cell_count; i++) {
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LASSERT_TYPE(builtin_op_strname(op), val, val->cell_list[i], LVAL_NUM);
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}
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//Get the first element
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lval* x = lval_pop(val, 0);
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if (op == BUILTIN_OP_SUB && val->cell_count == 0) {
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x->data.num = -x->data.num;
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}
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while(val->cell_count > 0) {
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//Get next to process
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lval* y = lval_pop(val, 0);
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switch(op) {
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case BUILTIN_OP_ADD: x->data.num += y->data.num; break;
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case BUILTIN_OP_SUB: x->data.num -= y->data.num; break;
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case BUILTIN_OP_MUL: x->data.num *= y->data.num; break;
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case BUILTIN_OP_POW: x->data.num = pow(x->data.num,y->data.num); break;
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case BUILTIN_OP_DIV: ;
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short divZero = 0;
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if (y->type == LVAL_NUM && fabs(y->data.num) <= DBL_EPSILON) {divZero = 1;}
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if (divZero) {
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lval_delete(x);
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lval_delete(y);
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x = lval_err(LERR_DIV_ZERO);
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break;
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} else {
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x->data.num /= y->data.num;
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}
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break;
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default:
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lval_delete(val);
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return lval_err_detail(LERR_BAD_OP, "expected operator got %s", builtin_op_strname(op));
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break;
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}
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lval_delete(y);
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}
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lval_delete(val);
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return x;
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}
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lval* builtin_add(lenv* env, lval* val) {
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return builtin_op(env, val, BUILTIN_OP_ADD);
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}
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lval* builtin_sub(lenv* env, lval* val) {
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return builtin_op(env, val, BUILTIN_OP_SUB);
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}
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lval* builtin_div(lenv* env, lval* val) {
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return builtin_op(env, val, BUILTIN_OP_DIV);
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}
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lval* builtin_mul(lenv* env, lval* val) {
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return builtin_op(env, val, BUILTIN_OP_MUL);
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}
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lval* builtin_pow(lenv* env, lval* val){
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return builtin_op(env, val, BUILTIN_OP_POW);
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}
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//End Math Functions
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//Start Comparison Functions
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lval* builtin_comp_num(lenv* env, lval* val, BUILTIN_OP_TYPE op) {
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char* opName = builtin_op_strname(op);
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LASSERT_ARG_COUNT(opName, val, val, 2);
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LASSERT_TYPE(opName, val, val->cell_list[0], LVAL_NUM);
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LASSERT_TYPE(opName, val, val->cell_list[1], LVAL_NUM);
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int r = 0;
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switch(op) {
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case BUILTIN_COMP_GT: r = val->cell_list[0]->data.num > val->cell_list[1]->data.num; break;
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case BUILTIN_COMP_LT: r = val->cell_list[0]->data.num < val->cell_list[1]->data.num; break;
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case BUILTIN_COMP_GE: r = val->cell_list[0]->data.num >= val->cell_list[1]->data.num; break;
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case BUILTIN_COMP_LE: r = val->cell_list[0]->data.num <= val->cell_list[1]->data.num; break;
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default:
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lval_delete(val);
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return lval_err_detail(LERR_BAD_OP, "Invalid comparison got %s", builtin_op_strname(op));
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break;
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}
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lval_delete(val);
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return lval_num(r);
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}
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lval* builtin_comp_gt(lenv* env, lval* val) {
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return builtin_comp_num(env, val, BUILTIN_COMP_GT);
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}
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lval* builtin_comp_lt(lenv* env, lval* val) {
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return builtin_comp_num(env, val, BUILTIN_COMP_LT);
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}
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lval* builtin_comp_ge(lenv* env, lval* val) {
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return builtin_comp_num(env, val, BUILTIN_COMP_GE);
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}
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lval* builtin_comp_le(lenv* env, lval* val) {
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return builtin_comp_num(env, val, BUILTIN_COMP_LE);
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}
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lval* builtin_comp_value(lenv* env, lval* val, BUILTIN_OP_TYPE op) {
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LASSERT_ARG_COUNT(builtin_op_strname(op), val, val, 2);
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BOOL result = FALSE;
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result = lval_equal(val->cell_list[0], val->cell_list[1]);
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if (op == BUILTIN_COMP_NEQ) {
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result = !result;
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}
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return lval_num((int)result);
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}
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lval* builtin_comp_eq(lenv* env, lval* val) {
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return builtin_comp_value(env, val, BUILTIN_COMP_EQ);
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}
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lval* builtin_comp_neq(lenv* env, lval* val) {
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return builtin_comp_value(env, val, BUILTIN_COMP_NEQ);
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}
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//End Comparison Functions
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//Start List/Util functions
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lval* builtin_list(lenv* env, lval* val){
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val->type = LVAL_Q_EXPR;
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return val;
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}
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lval* builtin_eval(lenv* env, lval* val){
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LASSERT_ARG_COUNT("eval", val, val, 1);
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LASSERT_TYPE("eval", val, val->cell_list[0], LVAL_Q_EXPR);
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lval* x = lval_take(val, 0);
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x->type = LVAL_S_EXPR;
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return eval(env, x);
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}
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lval* builtin_join(lenv* env, lval* val){
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LASSERT_MIN_ARG_COUNT("join", val, val, 1);
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for(int i = 0; i < val->cell_count; i++) {
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LASSERT_TYPE("join", val, val->cell_list[i], LVAL_Q_EXPR);
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}
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lval* x = lval_pop(val,0);
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while(val->cell_count > 0) {
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x = lval_join(x, lval_pop(val, 0));
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}
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return x;
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}
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lval* builtin_head(lenv* env, lval* val){
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LASSERT_ARG_COUNT("head", val, val, 1);
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LASSERT_TYPE("head", val, val->cell_list[0], LVAL_Q_EXPR);
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LASSERT_MIN_ARG_COUNT("head", val, val->cell_list[0], 1);
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lval* x = lval_take(val, 0);
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while(x->cell_count > 1) { lval_delete(lval_pop(x, 1)); }
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return x;
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}
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lval* builtin_tail(lenv* env, lval* val){
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LASSERT_ARG_COUNT("tail",val , val, 1);
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LASSERT_TYPE("tail", val, val->cell_list[0], LVAL_Q_EXPR);
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LASSERT_MIN_ARG_COUNT("tail", val, val->cell_list[0], 1);
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lval* x = lval_take(val, 0);
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lval_delete(lval_pop(x, 0));
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return x;
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}
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//End List/Util functions
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//Start ENV Functions
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lval* builtin_envdef(lenv* env, lval* val, char* type){
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LASSERT_MIN_ARG_COUNT(type, val, val, 1);
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LASSERT_TYPE(type, val, val->cell_list[0], LVAL_Q_EXPR);
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lval* symbols = val->cell_list[0];
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for(int i = 0; i < symbols->cell_count; i++) {
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LASSERT_TYPE(type, val, symbols->cell_list[i], LVAL_SYM);
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}
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LASSERT(val, symbols->cell_count == val->cell_count -1,
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LERR_OTHER, "%s: incorrect number of definitions for symbols", type);
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for(int i = 0; i < symbols->cell_count; i++) {
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if (strcmp(type, "def") == 0) {
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lenv_def(env, symbols->cell_list[i], val->cell_list[i+1]);
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} else if (strcmp(type, "var") == 0) {
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lenv_put(env, symbols->cell_list[i], val->cell_list[i+1]);
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}
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}
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lval_delete(val);
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return lval_s_expr();
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}
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lval* builtin_var(lenv* env, lval* val) {
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return builtin_envdef(env, val, "var");
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}
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lval* builtin_def(lenv* env, lval* val) {
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return builtin_envdef(env, val, "def");
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}
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lval* builtin_listenv(lenv* env, lval* val) {
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for(int i=0; i< env->count; i++) {
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printf("%s: ", env->syms[i]->sym);
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lval_println(env->syms[i]->lval);
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}
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lval_delete(val);
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return lval_s_expr();
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}
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lval* builtin_exit(lenv* env, lval* val) {
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lval* args = lval_q_expr();
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for(int i=0; i<val->cell_count; i++) {
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lval_add(args, lval_copy(val->cell_list[i]));
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}
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lval* sym = lval_sym("exitcode");
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lenv_put(env, sym, args);
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lval_delete(args);
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lval_delete(sym);
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lval_delete(val);
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return lval_exit();
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}
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lval* builtin_lambda(lenv* env, lval* val) {
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LASSERT_ARG_COUNT("lambda", val, val, 2);
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LASSERT_TYPE("lambda", val, val->cell_list[0], LVAL_Q_EXPR);
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LASSERT_TYPE("lambda", val, val->cell_list[1], LVAL_Q_EXPR);
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lval* symbols = val->cell_list[0];
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lval* va = NULL;
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for(int i = 0; i < symbols->cell_count; i++) {
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LASSERT_TYPE("lambda args", val, symbols->cell_list[i], LVAL_SYM);
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if (strcmp("&", symbols->cell_list[i]->data.sym) == 0 && i+1 == symbols->cell_count) {
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va = lval_pop(symbols, i);
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break;
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}
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}
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lval* formals = lval_pop(val, 0);
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lval* body = lval_pop(val, 0);
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body->type = LVAL_S_EXPR;
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lval* lambda = lval_lambda(formals, body);
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lambda->data.func->va = va;
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lval_delete(val);
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return lambda;
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}
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//End ENV Functions
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