105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
#include <assert.h>
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#include <stddef.h>
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#include "uclisp.h"
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#include "common.h"
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#include "scope.h"
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#include <string.h>
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struct ucl_object *ucl_evaluate_builtin_form(struct ucl *state, struct ucl_scope *scope, struct ucl_object *list) {
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// TODO: Reasonably split builtin and non-builtin evaluation
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struct ucl_object *evaluated_list = ucl_nil_create(state);
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struct ucl_object *evaluated_list_tail = evaluated_list;
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FOREACH_LIST(list, iter, item) {
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struct ucl_object *obj = ucl_evaluate_in_scope(state, scope, item);
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UCL_RET_IF_ERROR(obj);
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evaluated_list_tail = ucl_list_append(state, evaluated_list_tail, obj);
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};
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struct ucl_object *fun = ucl_car(state, evaluated_list);
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struct ucl_object *result = NULL;
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if (fun->type == UCL_TYPE_BUILTIN) {
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struct ucl_object *args = ucl_cdr(state, evaluated_list);
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result = fun->builtin(state, scope, args);
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} else if (fun->type == UCL_TYPE_CELL) {
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struct ucl_scope *fun_scope = ucl_scope_create_child(state, scope);
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struct ucl_object *fun_arg_syms = ucl_car(state, fun);
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struct ucl_object *fun_forms = ucl_cdr(state, fun);
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int i = 0;
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FOREACH_LIST(fun_arg_syms, iter, sym) {
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ucl_scope_put(state, fun_scope, sym->symbol, ucl_list_nth(evaluated_list, i + 1));
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i++;
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}
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result = ucl_progn(state, fun_scope, fun_forms);
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ucl_scope_delete(state, fun_scope);
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} else {
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assert(0);
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}
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return (result == NULL) ? ucl_nil_create(state) : result;
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}
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struct ucl_object *ucl_evaluate_special_form(struct ucl* state, struct ucl_scope *scope, struct ucl_object *list) {
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const char *fun_sym = ucl_car(state, list)->symbol;
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struct ucl_object *fun = ucl_scope_get(state, scope, fun_sym);
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struct ucl_object *args = ucl_cdr(state, list);
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struct ucl_object *result = NULL;
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result = fun->special(state, scope, args);
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return result;
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}
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struct ucl_object *ucl_evaluate_list(struct ucl* state, struct ucl_scope *scope, struct ucl_object *list) {
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if (list->cell.car == NULL) {
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return list;
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}
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struct ucl_object *fun = ucl_evaluate_in_scope(state, scope, ucl_car(state, list));
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UCL_RET_IF_ERROR(fun);
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if (fun->type == UCL_TYPE_SPECIAL) {
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return ucl_evaluate_special_form(state, scope, list);
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} else if (fun->type == UCL_TYPE_BUILTIN || fun->type == UCL_TYPE_CELL) {
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return ucl_evaluate_builtin_form(state, scope, list);
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} else {
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assert(0);
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UCL_COND_OR_RET_ERROR(false, "Unreachable error in ucl_evaluate_list");
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}
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}
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struct ucl_object *ucl_evaluate_in_scope(struct ucl *state, struct ucl_scope *scope, struct ucl_object *obj) {
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assert(obj != NULL);
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switch (obj->type) {
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case UCL_TYPE_CELL:
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return ucl_evaluate_list(state, scope, obj);
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case UCL_TYPE_SYMBOL:
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return ucl_scope_get(state, scope, obj->symbol);
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case UCL_TYPE_INT:
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case UCL_TYPE_STRING:
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case UCL_TYPE_ERROR:
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return obj;
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case UCL_TYPE_BUILTIN:
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case UCL_TYPE_SPECIAL:
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case UCL_TYPE_COUNT:
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assert(0);
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return NULL;
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}
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assert(0);
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return ucl_error_create(state, "Unreachable error in ucl_evaluate");
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}
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struct ucl_object *ucl_evaluate(struct ucl *state, struct ucl_object *obj) {
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return ucl_evaluate_in_scope(state, state->global_scope, obj);
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}
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struct ucl_object *ucl_evaluate_progn(struct ucl *state, struct ucl_object *forms) {
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return ucl_progn(state, state->global_scope, forms);
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}
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