#ifndef _AO_LISP_H_
#define _AO_LISP_H_
-#include <stdlib.h>
-
-#if !defined(AO_LISP_TEST) && !defined(AO_LISP_MAKE_CONST)
-#include <ao.h>
-#define AO_LISP_ALTOS 1
-#define abort() ao_panic(1)
-#endif
-
#include <stdint.h>
#include <string.h>
-#include <stdio.h>
+//#include <stdio.h>
+#include <ao_lisp_os.h>
#ifdef AO_LISP_MAKE_CONST
#define AO_LISP_POOL_CONST 16384
#define _ao_lisp_atom_car _atom("car")
#define _ao_lisp_atom_cdr _atom("cdr")
#define _ao_lisp_atom_cons _atom("cons")
+#define _ao_lisp_atom_last _atom("last")
#define _ao_lisp_atom_cond _atom("cond")
+#define _ao_lisp_atom_lambda _atom("lambda")
+#define _ao_lisp_atom_led _atom("led")
+#define _ao_lisp_atom_delay _atom("delay")
#else
#include "ao_lisp_const.h"
#ifndef AO_LISP_POOL
#define AO_LISP_ATOM 4
#define AO_LISP_BUILTIN 5
#define AO_LISP_FRAME 6
-#define AO_LISP_NUM_TYPE 7
+#define AO_LISP_LAMBDA 7
+#define AO_LISP_NUM_TYPE 8
#define AO_LISP_NIL 0
#define AO_LISP_OOM 0x01
#define AO_LISP_DIVIDE_BY_ZERO 0x02
#define AO_LISP_INVALID 0x04
+#define AO_LISP_UNDEFINED 0x08
extern uint8_t ao_lisp_exception;
static inline void *
ao_lisp_ref(ao_poly poly) {
if (poly == 0xBEEF)
- abort();
+ ao_lisp_abort();
if (poly == AO_LISP_NIL)
return NULL;
if (poly & AO_LISP_CONST)
}
struct ao_lisp_type {
- void (*mark)(void *addr);
int (*size)(void *addr);
+ void (*mark)(void *addr);
void (*move)(void *addr);
};
return ao_lisp_poly(frame, AO_LISP_OTHER);
}
-#define AO_LISP_LAMBDA 0
-#define AO_LISP_NLAMBDA 1
-#define AO_LISP_MACRO 2
-#define AO_LISP_LEXPR 3
+enum eval_state {
+ eval_sexpr, /* Evaluate an sexpr */
+ eval_val,
+ eval_formal,
+ eval_exec,
+ eval_cond,
+ eval_cond_test
+};
+
+struct ao_lisp_stack {
+ uint8_t state; /* enum eval_state */
+ ao_poly prev; /* previous stack frame */
+ ao_poly sexprs; /* expressions to evaluate */
+ ao_poly values; /* values computed */
+ ao_poly values_tail; /* end of the values list for easy appending */
+ ao_poly frame; /* current lookup frame */
+ ao_poly list; /* most recent function call */
+};
+
+static inline struct ao_lisp_stack *
+ao_lisp_poly_stack(ao_poly p)
+{
+ return ao_lisp_ref(p);
+}
+
+static inline ao_poly
+ao_lisp_stack_poly(struct ao_lisp_stack *stack)
+{
+ return ao_lisp_poly(stack, AO_LISP_OTHER);
+}
+
+extern struct ao_lisp_stack *ao_lisp_stack;
+extern ao_poly ao_lisp_v;
+
+#define AO_LISP_FUNC_LAMBDA 0
+#define AO_LISP_FUNC_NLAMBDA 1
+#define AO_LISP_FUNC_MACRO 2
+#define AO_LISP_FUNC_LEXPR 3
struct ao_lisp_builtin {
uint8_t type;
};
enum ao_lisp_builtin_id {
+ builtin_lambda,
+ builtin_lexpr,
+ builtin_nlambda,
+ builtin_macro,
builtin_car,
builtin_cdr,
builtin_cons,
+ builtin_last,
builtin_quote,
builtin_set,
builtin_setq,
builtin_cond,
builtin_print,
+ builtin_patom,
builtin_plus,
builtin_minus,
builtin_times,
builtin_greater,
builtin_less_equal,
builtin_greater_equal,
- builtin_last
+ builtin_delay,
+ builtin_led,
+ _builtin_last
};
typedef ao_poly (*ao_lisp_func_t)(struct ao_lisp_cons *cons);
-extern ao_lisp_func_t ao_lisp_builtins[];
+extern const ao_lisp_func_t ao_lisp_builtins[];
static inline ao_lisp_func_t
ao_lisp_func(struct ao_lisp_builtin *b)
return ao_lisp_builtins[b->func];
}
+struct ao_lisp_lambda {
+ uint8_t type;
+ uint8_t args;
+ ao_poly code;
+ ao_poly frame;
+};
+
+static inline struct ao_lisp_lambda *
+ao_lisp_poly_lambda(ao_poly poly)
+{
+ return ao_lisp_ref(poly);
+}
+
+static inline ao_poly
+ao_lisp_lambda_poly(struct ao_lisp_lambda *lambda)
+{
+ return ao_lisp_poly(lambda, AO_LISP_OTHER);
+}
+
static inline void *
ao_lisp_poly_other(ao_poly poly) {
return ao_lisp_ref(poly);
#define AO_LISP_OTHER_POLY(other) ((ao_poly)(other) + AO_LISP_OTHER)
+static inline int ao_lisp_poly_base_type(ao_poly poly) {
+ return poly & AO_LISP_TYPE_MASK;
+}
+
static inline int ao_lisp_poly_type(ao_poly poly) {
int type = poly & AO_LISP_TYPE_MASK;
if (type == AO_LISP_OTHER)
void
ao_lisp_cons_print(ao_poly);
+void
+ao_lisp_cons_patom(ao_poly);
+
/* string */
extern const struct ao_lisp_type ao_lisp_string_type;
void
ao_lisp_string_print(ao_poly s);
+void
+ao_lisp_string_patom(ao_poly s);
+
/* atom */
extern const struct ao_lisp_type ao_lisp_atom_type;
-extern struct ao_lisp_atom *ao_lisp_atoms;
-
-extern struct ao_lisp_frame *ao_lisp_frame_current;
+extern struct ao_lisp_atom *ao_lisp_atoms;
+extern struct ao_lisp_frame *ao_lisp_frame_global;
+extern struct ao_lisp_frame *ao_lisp_frame_current;
void
ao_lisp_atom_print(ao_poly a);
ao_lisp_int_print(ao_poly i);
/* prim */
-ao_poly
+void
ao_lisp_poly_print(ao_poly p);
+void
+ao_lisp_poly_patom(ao_poly p);
+
int
-ao_lisp_poly_mark(ao_poly p);
+ao_lisp_poly_mark(ao_poly p, uint8_t note_cons);
/* returns 1 if the object has already been moved */
int
-ao_lisp_poly_move(ao_poly *p);
+ao_lisp_poly_move(ao_poly *p, uint8_t note_cons);
/* eval */
ao_poly
ao_lisp_arg(struct ao_lisp_cons *cons, int argc);
+char *
+ao_lisp_args_name(uint8_t args);
+
/* read */
ao_poly
ao_lisp_read(void);
struct ao_lisp_frame *
ao_lisp_frame_add(struct ao_lisp_frame *frame, ao_poly atom, ao_poly val);
+void
+ao_lisp_frame_print(ao_poly p);
+
+/* lambda */
+extern const struct ao_lisp_type ao_lisp_lambda_type;
+
+struct ao_lisp_lambda *
+ao_lisp_lambda_new(ao_poly cons);
+
+void
+ao_lisp_lambda_print(ao_poly lambda);
+
+ao_poly
+ao_lisp_lambda(struct ao_lisp_cons *cons);
+
+ao_poly
+ao_lisp_lexpr(struct ao_lisp_cons *cons);
+
+ao_poly
+ao_lisp_nlambda(struct ao_lisp_cons *cons);
+
+ao_poly
+ao_lisp_macro(struct ao_lisp_cons *cons);
+
+ao_poly
+ao_lisp_lambda_eval(struct ao_lisp_lambda *lambda,
+ struct ao_lisp_cons *cons);
+
/* error */
+void
+ao_lisp_stack_print(void);
+
ao_poly
ao_lisp_error(int error, char *format, ...);
+/* debugging macros */
+
+#if DBG_EVAL
+#define DBG_CODE 1
+int ao_lisp_stack_depth;
+#define DBG_DO(a) a
+#define DBG_INDENT() do { int _s; for(_s = 0; _s < ao_lisp_stack_depth; _s++) printf(" "); } while(0)
+#define DBG_IN() (++ao_lisp_stack_depth)
+#define DBG_OUT() (--ao_lisp_stack_depth)
+#define DBG_RESET() (ao_lisp_stack_depth = 0)
+#define DBG(...) printf(__VA_ARGS__)
+#define DBGI(...) do { DBG("%4d: ", __LINE__); DBG_INDENT(); DBG(__VA_ARGS__); } while (0)
+#define DBG_CONS(a) ao_lisp_cons_print(ao_lisp_cons_poly(a))
+#define DBG_POLY(a) ao_lisp_poly_print(a)
+#define OFFSET(a) ((a) ? (int) ((uint8_t *) a - ao_lisp_pool) : -1)
+#define DBG_STACK() ao_lisp_stack_print()
+static inline void
+ao_lisp_frames_dump(void)
+{
+ struct ao_lisp_stack *s;
+ DBGI(".. current frame: "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
+ for (s = ao_lisp_stack; s; s = ao_lisp_poly_stack(s->prev)) {
+ DBGI(".. stack frame: "); DBG_POLY(s->frame); DBG("\n");
+ }
+}
+#define DBG_FRAMES() ao_lisp_frames_dump()
+#else
+#define DBG_DO(a)
+#define DBG_INDENT()
+#define DBG_IN()
+#define DBG_OUT()
+#define DBG(...)
+#define DBGI(...)
+#define DBG_CONS(a)
+#define DBG_POLY(a)
+#define DBG_RESET()
+#define DBG_STACK()
+#define DBG_FRAMES()
+#endif
+
#endif /* _AO_LISP_H_ */
projects / fw / altos / blobdiff