X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flisp%2Fao_lisp_eval.c;h=758a9232c27b24cd3d6f62752b256db094d5e59d;hb=cf5729a0bae51172f12fc9ec4339d4e975a45fcc;hp=3be7c9c4fa68c2fb29b60ec6f8b10ec6216ae705;hpb=4c812b8c903bd7e689572f8800ecc092af9cfe18;p=fw%2Faltos

diff --git a/src/lisp/ao_lisp_eval.c b/src/lisp/ao_lisp_eval.c
index 3be7c9c4..758a9232 100644
--- a/src/lisp/ao_lisp_eval.c
+++ b/src/lisp/ao_lisp_eval.c
@@ -17,6 +17,7 @@
 
 struct ao_lisp_stack		*ao_lisp_stack;
 ao_poly				ao_lisp_v;
+uint8_t				ao_lisp_skip_cons_free;
 
 ao_poly
 ao_lisp_set_cond(struct ao_lisp_cons *c)
@@ -107,6 +108,7 @@ ao_lisp_eval_sexpr(void)
 		DBGI("..frame "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
 		ao_lisp_v = ao_lisp_atom_get(ao_lisp_v);
 		/* fall through */
+	case AO_LISP_BOOL:
 	case AO_LISP_INT:
 	case AO_LISP_STRING:
 	case AO_LISP_BUILTIN:
@@ -210,7 +212,7 @@ ao_lisp_eval_formal(void)
 	}
 
 	/* Append formal to list of values */
-	formal = ao_lisp_cons_poly(ao_lisp_cons_cons(ao_lisp_v, NULL));
+	formal = ao_lisp__cons(ao_lisp_v, AO_LISP_NIL);
 	if (!formal)
 		return 0;
 
@@ -268,7 +270,7 @@ ao_lisp_eval_exec(void)
 				DBGI("set "); DBG_POLY(atom); DBG(" = "); DBG_POLY(val); DBG("\n");
 			});
 		builtin = ao_lisp_poly_builtin(ao_lisp_v);
-		if (builtin->args & AO_LISP_FUNC_FREE_ARGS && !ao_lisp_stack_marked(ao_lisp_stack))
+		if (builtin && builtin->args & AO_LISP_FUNC_FREE_ARGS && !ao_lisp_stack_marked(ao_lisp_stack) && !ao_lisp_skip_cons_free)
 			ao_lisp_cons_free(ao_lisp_poly_cons(ao_lisp_stack->values));
 
 		ao_lisp_v = v;
@@ -294,6 +296,38 @@ ao_lisp_eval_exec(void)
 		DBGI(".. frame "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
 		break;
 	}
+	ao_lisp_skip_cons_free = 0;
+	return 1;
+}
+
+/*
+ * Finish setting up the apply evaluation
+ *
+ * The value is the list to execute
+ */
+static int
+ao_lisp_eval_apply(void)
+{
+	struct ao_lisp_cons	*cons = ao_lisp_poly_cons(ao_lisp_v);
+	struct ao_lisp_cons	*cdr, *prev;
+
+	/* Glue the arguments into the right shape. That's all but the last
+	 * concatenated onto the last
+	 */
+	cdr = cons;
+	for (;;) {
+		prev = cdr;
+		cdr = ao_lisp_poly_cons(prev->cdr);
+		if (cdr->cdr == AO_LISP_NIL)
+			break;
+	}
+	DBGI("before mangling: "); DBG_POLY(ao_lisp_v); DBG("\n");
+	prev->cdr = cdr->car;
+	ao_lisp_stack->values = ao_lisp_v;
+	ao_lisp_v = ao_lisp_poly_cons(ao_lisp_stack->values)->car;
+	DBGI("apply: "); DBG_POLY(ao_lisp_stack->values); DBG ("\n");
+	ao_lisp_stack->state = eval_exec;
+	ao_lisp_skip_cons_free = 1;
 	return 1;
 }
 
@@ -323,6 +357,8 @@ ao_lisp_eval_cond(void)
 			return 0;
 		}
 		ao_lisp_v = ao_lisp_poly_cons(ao_lisp_v)->car;
+		if (ao_lisp_v == _ao_lisp_atom_else)
+			ao_lisp_v = _ao_lisp_bool_true;
 		ao_lisp_stack->state = eval_cond_test;
 		if (!ao_lisp_stack_push())
 			return 0;
@@ -345,7 +381,7 @@ ao_lisp_eval_cond_test(void)
 	DBGI("cond_test: "); DBG_POLY(ao_lisp_v); DBG(" sexprs "); DBG_POLY(ao_lisp_stack->sexprs); DBG("\n");
 	DBGI(".. frame "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
 	DBGI(".. saved frame "); DBG_POLY(ao_lisp_stack->frame); DBG("\n");
-	if (ao_lisp_v) {
+	if (ao_lisp_v != _ao_lisp_bool_false) {
 		struct ao_lisp_cons *car = ao_lisp_poly_cons(ao_lisp_poly_cons(ao_lisp_stack->sexprs)->car);
 		ao_poly c = car->cdr;
 
@@ -432,7 +468,7 @@ ao_lisp_eval_while_test(void)
 	DBGI(".. frame "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
 	DBGI(".. saved frame "); DBG_POLY(ao_lisp_stack->frame); DBG("\n");
 
-	if (ao_lisp_v) {
+	if (ao_lisp_v != _ao_lisp_bool_false) {
 		ao_lisp_stack->values = ao_lisp_v;
 		ao_lisp_v = ao_lisp_poly_cons(ao_lisp_stack->sexprs)->cdr;
 		ao_lisp_stack->state = eval_while;
@@ -475,6 +511,7 @@ static int (*const evals[])(void) = {
 	[eval_val] = ao_lisp_eval_val,
 	[eval_formal] = ao_lisp_eval_formal,
 	[eval_exec] = ao_lisp_eval_exec,
+	[eval_apply] = ao_lisp_eval_apply,
 	[eval_cond] = ao_lisp_eval_cond,
 	[eval_cond_test] = ao_lisp_eval_cond_test,
 	[eval_progn] = ao_lisp_eval_progn,
@@ -484,13 +521,17 @@ static int (*const evals[])(void) = {
 };
 
 const char *ao_lisp_state_names[] = {
-	"sexpr",
-	"val",
-	"formal",
-	"exec",
-	"cond",
-	"cond_test",
-	"progn",
+	[eval_sexpr] = "sexpr",
+	[eval_val] = "val",
+	[eval_formal] = "formal",
+	[eval_exec] = "exec",
+	[eval_apply] = "apply",
+	[eval_cond] = "cond",
+	[eval_cond_test] = "cond_test",
+	[eval_progn] = "progn",
+	[eval_while] = "while",
+	[eval_while_test] = "while_test",
+	[eval_macro] = "macro",
 };
 
 /*