#ifndef _AO_LISP_H_
#define _AO_LISP_H_
-#if !defined(AO_LISP_TEST) && !defined(AO_LISP_MAKE_CONST)
-#include <ao.h>
-#define AO_LISP_ALTOS 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
extern uint8_t ao_lisp_const[AO_LISP_POOL_CONST];
-#define _ao_lisp_atom_quote ao_lisp_atom_poly(ao_lisp_atom_intern("quote"))
+#define ao_lisp_pool ao_lisp_const
+#define AO_LISP_POOL AO_LISP_POOL_CONST
+
+#define _atom(n) ao_lisp_atom_poly(ao_lisp_atom_intern(n))
+
+#define _ao_lisp_atom_quote _atom("quote")
+#define _ao_lisp_atom_set _atom("set")
+#define _ao_lisp_atom_setq _atom("setq")
+#define _ao_lisp_atom_t _atom("t")
+#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_POOL 16384
+#endif
+extern uint8_t ao_lisp_pool[AO_LISP_POOL];
#endif
/* Primitive types */
/* These have a type value at the start of the struct */
#define AO_LISP_ATOM 4
#define AO_LISP_BUILTIN 5
-#define AO_LISP_NUM_TYPE 6
+#define AO_LISP_FRAME 6
+#define AO_LISP_LAMBDA 7
+#define AO_LISP_NUM_TYPE 8
#define AO_LISP_NIL 0
-#define AO_LISP_POOL 1024
-
-extern uint8_t ao_lisp_pool[AO_LISP_POOL];
extern uint16_t ao_lisp_top;
#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;
typedef uint16_t ao_poly;
+typedef int16_t ao_signed_poly;
static inline int
ao_lisp_is_const(ao_poly poly) {
return poly & AO_LISP_CONST;
}
+#define AO_LISP_POOL_BASE (ao_lisp_pool - 4)
+#define AO_LISP_CONST_BASE (ao_lisp_const - 4)
+
+#define AO_LISP_IS_CONST(a) (ao_lisp_const <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_const + AO_LISP_POOL_CONST)
+#define AO_LISP_IS_POOL(a) (ao_lisp_pool <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_pool + AO_LISP_POOL)
+
static inline void *
ao_lisp_ref(ao_poly poly) {
+ if (poly == 0xBEEF)
+ ao_lisp_abort();
if (poly == AO_LISP_NIL)
return NULL;
if (poly & AO_LISP_CONST)
- return (void *) ((ao_lisp_const - 4) + (poly & AO_LISP_REF_MASK));
- else
- return (void *) ((ao_lisp_pool - 4) + (poly & AO_LISP_REF_MASK));
+ return (void *) (AO_LISP_CONST_BASE + (poly & AO_LISP_REF_MASK));
+ return (void *) (AO_LISP_POOL_BASE + (poly & AO_LISP_REF_MASK));
}
static inline ao_poly
ao_lisp_poly(const void *addr, ao_poly type) {
const uint8_t *a = addr;
- if (addr == NULL)
+ if (a == NULL)
return AO_LISP_NIL;
- if (ao_lisp_pool <= a && a < ao_lisp_pool + AO_LISP_POOL)
- return (a - (ao_lisp_pool - 4)) | type;
- else if (ao_lisp_const <= a && a <= ao_lisp_const + AO_LISP_POOL_CONST)
- return AO_LISP_CONST | (a - (ao_lisp_const - 4)) | type;
- else {
- ao_lisp_exception |= AO_LISP_INVALID;
- return AO_LISP_NIL;
- }
+ if (AO_LISP_IS_CONST(a))
+ return AO_LISP_CONST | (a - AO_LISP_CONST_BASE) | type;
+ return (a - AO_LISP_POOL_BASE) | type;
}
-#define AO_LISP_POLY(addr, type) (((ao_lisp_pool <= ((uint8_t *) (a)) && \
- ((uint8_t *) (a)) < ao_lisp_pool + AO_LISP_POOL) ? \
- ((uint8_t *) (a) - (ao_lisp_pool - 4)) : \
- (((uint8_t *) (a) - (ao_lisp_const - 4)) | AO_LISP_POOL_CONST)) | \
- (type))
-
struct ao_lisp_type {
- void (*mark)(void *addr);
int (*size)(void *addr);
+ void (*mark)(void *addr);
void (*move)(void *addr);
};
struct ao_lisp_atom {
uint8_t type;
uint8_t pad[1];
- ao_poly val;
ao_poly next;
char name[];
};
-#define AO_LISP_LAMBDA 0
-#define AO_LISP_NLAMBDA 1
-#define AO_LISP_MACRO 2
-#define AO_LISP_LEXPR 3
+struct ao_lisp_val {
+ ao_poly atom;
+ ao_poly val;
+};
+
+struct ao_lisp_frame {
+ uint8_t type;
+ uint8_t num;
+ ao_poly next;
+ struct ao_lisp_val vals[];
+};
+
+static inline struct ao_lisp_frame *
+ao_lisp_poly_frame(ao_poly poly) {
+ return ao_lisp_ref(poly);
+}
+
+static inline ao_poly
+ao_lisp_frame_poly(struct ao_lisp_frame *frame) {
+ return ao_lisp_poly(frame, AO_LISP_OTHER);
+}
+
+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_divide,
builtin_mod,
- builtin_last
+ builtin_equal,
+ builtin_less,
+ builtin_greater,
+ builtin_less_equal,
+ builtin_greater_equal,
+ 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);
}
+static inline uint8_t
+ao_lisp_other_type(void *other) {
+ return *((uint8_t *) other);
+}
+
static inline ao_poly
ao_lisp_other_poly(const void *other)
{
#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 & 3;
+ int type = poly & AO_LISP_TYPE_MASK;
if (type == AO_LISP_OTHER)
- return *((uint8_t *) ao_lisp_poly_other(poly));
+ return ao_lisp_other_type(ao_lisp_poly_other(poly));
return type;
}
static inline int
ao_lisp_poly_int(ao_poly poly)
{
- return (int) poly >> AO_LISP_TYPE_SHIFT;
+ return (int) ((ao_signed_poly) poly >> AO_LISP_TYPE_SHIFT);
}
static inline ao_poly
ao_lisp_int_poly(int i)
{
- return ((ao_poly) i << 2) + AO_LISP_INT;
+ return ((ao_poly) i << 2) | AO_LISP_INT;
}
static inline char *
}
/* memory functions */
-void
+/* returns 1 if the object was already marked */
+int
ao_lisp_mark(const struct ao_lisp_type *type, void *addr);
/* returns 1 if the object was already marked */
ao_lisp_mark_memory(void *addr, int size);
void *
-ao_lisp_move(const struct ao_lisp_type *type, void *addr);
+ao_lisp_move_map(void *addr);
-/* returns NULL if the object was already moved */
-void *
-ao_lisp_move_memory(void *addr, int size);
+/* returns 1 if the object was already moved */
+int
+ao_lisp_move(const struct ao_lisp_type *type, void **ref);
+
+/* returns 1 if the object was already moved */
+int
+ao_lisp_move_memory(void **ref, int size);
void *
ao_lisp_alloc(int size);
+void
+ao_lisp_collect(void);
+
int
ao_lisp_root_add(const struct ao_lisp_type *type, void *addr);
+int
+ao_lisp_root_poly_add(ao_poly *p);
+
void
ao_lisp_root_clear(void *addr);
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;
-
-void
-ao_lisp_atom_init(void);
+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);
struct ao_lisp_atom *
ao_lisp_atom_intern(char *name);
+ao_poly
+ao_lisp_atom_get(ao_poly atom);
+
+ao_poly
+ao_lisp_atom_set(ao_poly atom, ao_poly val);
+
/* int */
void
ao_lisp_int_print(ao_poly i);
/* prim */
-ao_poly
+void
ao_lisp_poly_print(ao_poly p);
void
-ao_lisp_poly_mark(ao_poly p);
+ao_lisp_poly_patom(ao_poly p);
-ao_poly
-ao_lisp_poly_move(ao_poly p);
+int
+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, uint8_t note_cons);
/* eval */
+
ao_poly
ao_lisp_eval(ao_poly p);
+ao_poly
+ao_lisp_set_cond(struct ao_lisp_cons *cons);
+
/* builtin */
void
ao_lisp_builtin_print(ao_poly b);
+extern const struct ao_lisp_type ao_lisp_builtin_type;
+
+/* Check argument count */
+ao_poly
+ao_lisp_check_argc(ao_poly name, struct ao_lisp_cons *cons, int min, int max);
+
+/* Check argument type */
+ao_poly
+ao_lisp_check_argt(ao_poly name, struct ao_lisp_cons *cons, int argc, int type, int nil_ok);
+
+/* Fetch an arg (nil if off the end) */
+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);
ao_poly
ao_lisp_read_eval_print(void);
+/* frame */
+extern const struct ao_lisp_type ao_lisp_frame_type;
+
+ao_poly *
+ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom);
+
+struct ao_lisp_frame *
+ao_lisp_frame_new(int num);
+
+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