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hyung-hwan 2005-09-18 10:18:35 +00:00
parent 5615eb8208
commit 250170a4f8
4 changed files with 273 additions and 191 deletions
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188
ase/lsp/eval.c
View File

@ -1,36 +1,36 @@
/* /*
* $Id: eval.c,v 1.7 2005-05-28 13:34:26 bacon Exp $ * $Id: eval.c,v 1.8 2005-09-18 10:18:35 bacon Exp $
*/ */
#include <xp/lsp/lisp.h> #include <xp/lsp/lsp.h>
#include <xp/lsp/env.h> #include <xp/lsp/env.h>
#include <xp/lsp/primitive.h> #include <xp/lsp/prim.h>
#include <xp/bas/assert.h> #include <xp/bas/assert.h>
static xp_lisp_obj_t* make_func (xp_lisp_t* lsp, xp_lisp_obj_t* cdr, int is_macro); static xp_lsp_obj_t* make_func (xp_lsp_t* lsp, xp_lsp_obj_t* cdr, int is_macro);
static xp_lisp_obj_t* eval_cons (xp_lisp_t* lsp, xp_lisp_obj_t* cons); static xp_lsp_obj_t* eval_cons (xp_lsp_t* lsp, xp_lsp_obj_t* cons);
static xp_lisp_obj_t* apply (xp_lisp_t* lsp, xp_lisp_obj_t* func, xp_lisp_obj_t* actual); static xp_lsp_obj_t* apply (xp_lsp_t* lsp, xp_lsp_obj_t* func, xp_lsp_obj_t* actual);
xp_lisp_obj_t* xp_lisp_eval (xp_lisp_t* lsp, xp_lisp_obj_t* obj) xp_lsp_obj_t* xp_lsp_eval (xp_lsp_t* lsp, xp_lsp_obj_t* obj)
{ {
lsp->error = XP_LISP_ERR_NONE; lsp->errnum = XP_LSP_ERR_NONE;
if (XP_LISP_TYPE(obj) == XP_LISP_OBJ_CONS) if (XP_LSP_TYPE(obj) == XP_LSP_OBJ_CONS)
return eval_cons (lsp, obj); return eval_cons (lsp, obj);
else if (XP_LISP_TYPE(obj) == XP_LISP_OBJ_SYMBOL) { else if (XP_LSP_TYPE(obj) == XP_LSP_OBJ_SYMBOL) {
xp_lisp_assoc_t* assoc; xp_lsp_assoc_t* assoc;
/* /*
if (obj == lsp->mem->lambda || obj == lsp->mem->macro) { if (obj == lsp->mem->lambda || obj == lsp->mem->macro) {
printf ("lambda or macro can't be used as a normal symbol\n"); printf ("lambda or macro can't be used as a normal symbol\n");
lsp->error = XP_LISP_ERR_BAD_SYMBOL; lsp->errnum = XP_LSP_ERR_BAD_SYMBOL;
return XP_NULL; return XP_NULL;
} }
*/ */
if ((assoc = xp_lisp_lookup (lsp->mem, obj)) == XP_NULL) { if ((assoc = xp_lsp_lookup (lsp->mem, obj)) == XP_NULL) {
if (lsp->opt_undef_symbol) { if (lsp->opt_undef_symbol) {
lsp->error = XP_LISP_ERR_UNDEF_SYMBOL; lsp->errnum = XP_LSP_ERR_UNDEF_SYMBOL;
return XP_NULL; return XP_NULL;
} }
return lsp->mem->nil; return lsp->mem->nil;
@ -42,50 +42,50 @@ xp_lisp_obj_t* xp_lisp_eval (xp_lisp_t* lsp, xp_lisp_obj_t* obj)
return obj; return obj;
} }
static xp_lisp_obj_t* make_func (xp_lisp_t* lsp, xp_lisp_obj_t* cdr, int is_macro) static xp_lsp_obj_t* make_func (xp_lsp_t* lsp, xp_lsp_obj_t* cdr, int is_macro)
{ {
// TODO: lambda expression syntax check. // TODO: lambda expression syntax check.
xp_lisp_obj_t* func, * formal, * body; xp_lsp_obj_t* func, * formal, * body;
printf ("about to create a function or a macro ....\n"); xp_printf (XP_TEXT("about to create a function or a macro ....\n"));
if (cdr == lsp->mem->nil) { if (cdr == lsp->mem->nil) {
lsp->error = XP_LISP_ERR_TOO_FEW_ARGS; lsp->errnum = XP_LSP_ERR_TOO_FEW_ARGS;
return XP_NULL; return XP_NULL;
} }
if (XP_LISP_TYPE(cdr) != XP_LISP_OBJ_CONS) { if (XP_LSP_TYPE(cdr) != XP_LSP_OBJ_CONS) {
lsp->error = XP_LISP_ERR_BAD_ARG; lsp->errnum = XP_LSP_ERR_BAD_ARG;
return XP_NULL; return XP_NULL;
} }
formal = XP_LISP_CAR(cdr); formal = XP_LSP_CAR(cdr);
body = XP_LISP_CDR(cdr); body = XP_LSP_CDR(cdr);
if (body == lsp->mem->nil) { if (body == lsp->mem->nil) {
lsp->error = XP_LISP_ERR_EMPTY_BODY; lsp->errnum = XP_LSP_ERR_EMPTY_BODY;
return XP_NULL; return XP_NULL;
} }
func = (is_macro)? func = (is_macro)?
xp_lisp_make_macro (lsp->mem, formal, body): xp_lsp_make_macro (lsp->mem, formal, body):
xp_lisp_make_func (lsp->mem, formal, body); xp_lsp_make_func (lsp->mem, formal, body);
if (func == XP_NULL) { if (func == XP_NULL) {
lsp->error = XP_LISP_ERR_MEM; lsp->errnum = XP_LSP_ERR_MEM;
return XP_NULL; return XP_NULL;
} }
return func; return func;
} }
static xp_lisp_obj_t* eval_cons (xp_lisp_t* lsp, xp_lisp_obj_t* cons) static xp_lsp_obj_t* eval_cons (xp_lsp_t* lsp, xp_lsp_obj_t* cons)
{ {
xp_lisp_obj_t* car, * cdr; xp_lsp_obj_t* car, * cdr;
xp_assert (XP_LISP_TYPE(cons) == XP_LISP_OBJ_CONS); xp_assert (XP_LSP_TYPE(cons) == XP_LSP_OBJ_CONS);
car = XP_LISP_CAR(cons); car = XP_LSP_CAR(cons);
cdr = XP_LISP_CDR(cons); cdr = XP_LSP_CDR(cons);
if (car == lsp->mem->lambda) { if (car == lsp->mem->lambda) {
return make_func (lsp, cdr, 0); return make_func (lsp, cdr, 0);
@ -93,89 +93,89 @@ static xp_lisp_obj_t* eval_cons (xp_lisp_t* lsp, xp_lisp_obj_t* cons)
else if (car == lsp->mem->macro) { else if (car == lsp->mem->macro) {
return make_func (lsp, cdr, 1); return make_func (lsp, cdr, 1);
} }
else if (XP_LISP_TYPE(car) == XP_LISP_OBJ_SYMBOL) { else if (XP_LSP_TYPE(car) == XP_LSP_OBJ_SYMBOL) {
xp_lisp_assoc_t* assoc; xp_lsp_assoc_t* assoc;
if ((assoc = xp_lisp_lookup (lsp->mem, car)) != XP_NULL) { if ((assoc = xp_lsp_lookup (lsp->mem, car)) != XP_NULL) {
xp_lisp_obj_t* func = assoc->value; xp_lsp_obj_t* func = assoc->value;
if (XP_LISP_TYPE(func) == XP_LISP_OBJ_FUNC || if (XP_LSP_TYPE(func) == XP_LSP_OBJ_FUNC ||
XP_LISP_TYPE(func) == XP_LISP_OBJ_MACRO) { XP_LSP_TYPE(func) == XP_LSP_OBJ_MACRO) {
return apply (lsp, func, cdr); return apply (lsp, func, cdr);
} }
else if (XP_LISP_TYPE(func) == XP_LISP_OBJ_PRIM) { else if (XP_LSP_TYPE(func) == XP_LSP_OBJ_PRIM) {
// primitive function // primitive function
return XP_LISP_PIMPL(func) (lsp, cdr); return XP_LSP_PIMPL(func) (lsp, cdr);
} }
else { else {
printf ("undefined function: "); printf ("undefined function: ");
xp_lisp_print (lsp, car); xp_lsp_print (lsp, car);
printf ("\n"); printf ("\n");
lsp->error = XP_LISP_ERR_UNDEF_FUNC; lsp->errnum = XP_LSP_ERR_UNDEF_FUNC;
return XP_NULL; return XP_NULL;
} }
} }
else { else {
//TODO: better error handling. //TODO: better error handling.
printf ("undefined function: "); printf ("undefined function: ");
xp_lisp_print (lsp, car); xp_lsp_print (lsp, car);
printf ("\n"); printf ("\n");
lsp->error = XP_LISP_ERR_UNDEF_FUNC; lsp->errnum = XP_LSP_ERR_UNDEF_FUNC;
return XP_NULL; return XP_NULL;
} }
} }
else if (XP_LISP_TYPE(car) == XP_LISP_OBJ_FUNC || else if (XP_LSP_TYPE(car) == XP_LSP_OBJ_FUNC ||
XP_LISP_TYPE(car) == XP_LISP_OBJ_MACRO) { XP_LSP_TYPE(car) == XP_LSP_OBJ_MACRO) {
return apply (lsp, car, cdr); return apply (lsp, car, cdr);
} }
else if (XP_LISP_TYPE(car) == XP_LISP_OBJ_CONS) { else if (XP_LSP_TYPE(car) == XP_LSP_OBJ_CONS) {
if (XP_LISP_CAR(car) == lsp->mem->lambda) { if (XP_LSP_CAR(car) == lsp->mem->lambda) {
xp_lisp_obj_t* func = make_func (lsp, XP_LISP_CDR(car), 0); xp_lsp_obj_t* func = make_func (lsp, XP_LSP_CDR(car), 0);
if (func == XP_NULL) return XP_NULL; if (func == XP_NULL) return XP_NULL;
return apply (lsp, func, cdr); return apply (lsp, func, cdr);
} }
else if (XP_LISP_CAR(car) == lsp->mem->macro) { else if (XP_LSP_CAR(car) == lsp->mem->macro) {
xp_lisp_obj_t* func = make_func (lsp, XP_LISP_CDR(car), 1); xp_lsp_obj_t* func = make_func (lsp, XP_LSP_CDR(car), 1);
if (func == XP_NULL) return XP_NULL; if (func == XP_NULL) return XP_NULL;
return apply (lsp, func, cdr); return apply (lsp, func, cdr);
} }
} }
xp_printf (XP_TEXT("bad function: ")); xp_printf (XP_TEXT("bad function: "));
xp_lisp_print (lsp, car); xp_lsp_print (lsp, car);
xp_printf (XP_TEXT("\n")); xp_printf (XP_TEXT("\n"));
lsp->error = XP_LISP_ERR_BAD_FUNC; lsp->errnum = XP_LSP_ERR_BAD_FUNC;
return XP_NULL; return XP_NULL;
} }
static xp_lisp_obj_t* apply (xp_lisp_t* lsp, xp_lisp_obj_t* func, xp_lisp_obj_t* actual) static xp_lsp_obj_t* apply (xp_lsp_t* lsp, xp_lsp_obj_t* func, xp_lsp_obj_t* actual)
{ {
xp_lisp_frame_t* frame; xp_lsp_frame_t* frame;
xp_lisp_obj_t* formal; xp_lsp_obj_t* formal;
xp_lisp_obj_t* body; xp_lsp_obj_t* body;
xp_lisp_obj_t* value; xp_lsp_obj_t* value;
xp_lisp_mem_t* mem; xp_lsp_mem_t* mem;
xp_assert ( xp_assert (
XP_LISP_TYPE(func) == XP_LISP_OBJ_FUNC || XP_LSP_TYPE(func) == XP_LSP_OBJ_FUNC ||
XP_LISP_TYPE(func) == XP_LISP_OBJ_MACRO); XP_LSP_TYPE(func) == XP_LSP_OBJ_MACRO);
xp_assert (XP_LISP_TYPE(XP_LISP_CDR(func)) == XP_LISP_OBJ_CONS); xp_assert (XP_LSP_TYPE(XP_LSP_CDR(func)) == XP_LSP_OBJ_CONS);
mem = lsp->mem; mem = lsp->mem;
if (XP_LISP_TYPE(func) == XP_LISP_OBJ_MACRO) { if (XP_LSP_TYPE(func) == XP_LSP_OBJ_MACRO) {
formal = XP_LISP_MFORMAL (func); formal = XP_LSP_MFORMAL (func);
body = XP_LISP_MBODY (func); body = XP_LSP_MBODY (func);
} }
else { else {
formal = XP_LISP_FFORMAL (func); formal = XP_LSP_FFORMAL (func);
body = XP_LISP_FBODY (func); body = XP_LSP_FBODY (func);
} }
// make a new frame. // make a new frame.
frame = xp_lisp_frame_new (); frame = xp_lsp_frame_new ();
if (frame == XP_NULL) { if (frame == XP_NULL) {
lsp->error = XP_LISP_ERR_MEM; lsp->errnum = XP_LSP_ERR_MEM;
return XP_NULL; return XP_NULL;
} }
@ -187,50 +187,50 @@ static xp_lisp_obj_t* apply (xp_lisp_t* lsp, xp_lisp_obj_t* func, xp_lisp_obj_t*
// evaluate arguments and push them into the frame. // evaluate arguments and push them into the frame.
while (formal != mem->nil) { while (formal != mem->nil) {
if (actual == mem->nil) { if (actual == mem->nil) {
lsp->error = XP_LISP_ERR_TOO_FEW_ARGS; lsp->errnum = XP_LSP_ERR_TOO_FEW_ARGS;
mem->brooding_frame = frame->link; mem->brooding_frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
value = XP_LISP_CAR(actual); value = XP_LSP_CAR(actual);
if (XP_LISP_TYPE(func) != XP_LISP_OBJ_MACRO) { if (XP_LSP_TYPE(func) != XP_LSP_OBJ_MACRO) {
// macro doesn't evaluate actual arguments. // macro doesn't evaluate actual arguments.
value = xp_lisp_eval (lsp, value); value = xp_lsp_eval (lsp, value);
if (value == XP_NULL) { if (value == XP_NULL) {
mem->brooding_frame = frame->link; mem->brooding_frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
} }
if (xp_lisp_frame_lookup (frame, XP_LISP_CAR(formal)) != XP_NULL) { if (xp_lsp_frame_lookup (frame, XP_LSP_CAR(formal)) != XP_NULL) {
lsp->error = XP_LISP_ERR_DUP_FORMAL; lsp->errnum = XP_LSP_ERR_DUP_FORMAL;
mem->brooding_frame = frame->link; mem->brooding_frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
if (xp_lisp_frame_insert (frame, XP_LISP_CAR(formal), value) == XP_NULL) { if (xp_lsp_frame_insert (frame, XP_LSP_CAR(formal), value) == XP_NULL) {
lsp->error = XP_LISP_ERR_MEM; lsp->errnum = XP_LSP_ERR_MEM;
mem->brooding_frame = frame->link; mem->brooding_frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
actual = XP_LISP_CDR(actual); actual = XP_LSP_CDR(actual);
formal = XP_LISP_CDR(formal); formal = XP_LSP_CDR(formal);
} }
if (XP_LISP_TYPE(actual) == XP_LISP_OBJ_CONS) { if (XP_LSP_TYPE(actual) == XP_LSP_OBJ_CONS) {
lsp->error = XP_LISP_ERR_TOO_MANY_ARGS; lsp->errnum = XP_LSP_ERR_TOO_MANY_ARGS;
mem->brooding_frame = frame->link; mem->brooding_frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
else if (actual != mem->nil) { else if (actual != mem->nil) {
lsp->error = XP_LISP_ERR_BAD_ARG; lsp->errnum = XP_LSP_ERR_BAD_ARG;
mem->brooding_frame = frame->link; mem->brooding_frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
@ -242,24 +242,24 @@ static xp_lisp_obj_t* apply (xp_lisp_t* lsp, xp_lisp_obj_t* func, xp_lisp_obj_t*
// do the evaluation of the body // do the evaluation of the body
value = mem->nil; value = mem->nil;
while (body != mem->nil) { while (body != mem->nil) {
value = xp_lisp_eval(lsp, XP_LISP_CAR(body)); value = xp_lsp_eval(lsp, XP_LSP_CAR(body));
if (value == XP_NULL) { if (value == XP_NULL) {
mem->frame = frame->link; mem->frame = frame->link;
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
return XP_NULL; return XP_NULL;
} }
body = XP_LISP_CDR(body); body = XP_LSP_CDR(body);
} }
// pop the frame. // pop the frame.
mem->frame = frame->link; mem->frame = frame->link;
// destroy the frame. // destroy the frame.
xp_lisp_frame_free (frame); xp_lsp_frame_free (frame);
//if (XP_LISP_CAR(func) == mem->macro) { //if (XP_LSP_CAR(func) == mem->macro) {
if (XP_LISP_TYPE(func) == XP_LISP_OBJ_MACRO) { if (XP_LSP_TYPE(func) == XP_LSP_OBJ_MACRO) {
value = xp_lisp_eval(lsp, value); value = xp_lsp_eval(lsp, value);
if (value == XP_NULL) return XP_NULL; if (value == XP_NULL) return XP_NULL;
} }

125
ase/lsp/init.c Normal file
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@ -0,0 +1,125 @@
/*
* $Id: init.c,v 1.1 2005-09-18 10:18:35 bacon Exp $
*/
#include <xp/lsp/lsp.h>
#include <xp/bas/memory.h>
#include <xp/bas/assert.h>
xp_lsp_t* xp_lsp_open (xp_lsp_t* lsp,
xp_size_t mem_ubound, xp_size_t mem_ubound_inc)
{
if (lsp == XP_NULL) {
lsp = (xp_lsp_t*)xp_malloc(xp_sizeof(xp_lsp_t));
if (lsp == XP_NULL) return lsp;
lsp->__malloced = xp_true;
}
else lsp->__malloced = xp_false;
if (xp_lsp_token_open(&lsp->token, 0) == XP_NULL) {
if (lsp->__malloced) xp_free (lsp);
return XP_NULL;
}
lsp->errnum = XP_LSP_ERR_NONE;
//lsp->opt_undef_symbol = 1;
lsp->opt_undef_symbol = 0;
lsp->curc = XP_CHAR_EOF;
lsp->input_func = XP_NULL;
lsp->output_func = XP_NULL;
lsp->mem = xp_lsp_mem_new (mem_ubound, mem_ubound_inc);
if (lsp->mem == XP_NULL) {
xp_lsp_token_close (&lsp->token);
if (lsp->__malloced) xp_free (lsp);
return XP_NULL;
}
if (xp_lsp_add_prims (lsp->mem) == -1) {
xp_lsp_mem_free (lsp->mem);
xp_lsp_token_close (&lsp->token);
if (lsp->__malloced) xp_free (lsp);
return XP_NULL;
}
return lsp;
}
void xp_lsp_close (xp_lsp_t* lsp)
{
xp_assert (lsp != XP_NULL);
xp_lsp_mem_free (lsp->mem);
xp_lsp_token_close (&lsp->token);
if (lsp->__malloced) xp_free (lsp);
}
int xp_lsp_error (xp_lsp_t* lsp, xp_char_t* buf, xp_size_t size)
{
if (buf != XP_NULL || size == 0) return lsp->errnum;
// TODO:...
/*
switch (lsp->errnum) {
default:
xp_lsp_copy_string (buf, size, "unknown error");
}
*/
return lsp->errnum;
}
int xp_lsp_attach_input (xp_lsp_t* lsp, xp_lsp_io_t input)
{
if (xp_lsp_detach_input(lsp) == -1) return -1;
xp_assert (lsp->input_func == XP_NULL);
if (input(XP_LSP_IO_OPEN, lsp, XP_NULL) == -1) {
/* TODO: set error number */
return -1;
}
lsp->input_func = input;
return 0;
}
int xp_lsp_detach_input (xp_lsp_t* lsp)
{
if (lsp->input_func != XP_NULL) {
if (lsp->input_func(XP_LSP_IO_CLOSE, lsp, XP_NULL) == -1) {
/* TODO: set error number */
return -1;
}
lsp->input_func = XP_NULL;
}
return 0;
}
int xp_lsp_attach_output (xp_lsp_t* lsp, xp_lsp_io_t output)
{
if (xp_lsp_detach_output(lsp) == -1) return -1;
xp_assert (lsp->output_func == XP_NULL);
if (output(XP_LSP_IO_OPEN, lsp, XP_NULL) == -1) {
/* TODO: set error number */
return -1;
}
lsp->output_func = output;
return 0;
}
int xp_lsp_detach_output (xp_lsp_t* lsp)
{
if (lsp->output_func != XP_NULL) {
if (lsp->output_func(XP_LSP_IO_CLOSE, lsp, XP_NULL) == -1) {
/* TODO: set error number */
return -1;
}
lsp->output_func = XP_NULL;
}
return 0;
}

74
ase/lsp/lsp.c
View File

@ -1,74 +0,0 @@
/*
* $Id: lsp.c,v 1.3 2005-09-18 03:57:26 bacon Exp $
*/
#include <xp/lsp/lsp.h>
#include <xp/bas/memory.h>
#include <xp/bas/assert.h>
xp_lsp_t* xp_lsp_open (xp_lsp_t* lsp,
xp_size_t mem_ubound, xp_size_t mem_ubound_inc)
{
if (lsp == XP_NULL) {
lsp = (xp_lsp_t*)xp_malloc(sizeofxp_lsp_t));
if (lsp == XP_NULL) return lsp;
lsp->__malloced = xp_true;
}
else lsp->__malloced = xp_false;
lsp->token = xp_lsp_token_new (256);
if (lsp->token == XP_NULL) {
xp_free (lsp);
return XP_NULL;
}
lsp->error = XP_LISP_ERR_NONE;
//lsp->opt_undef_symbol = 1;
lsp->opt_undef_symbol = 0;
lsp->curc = XP_CHAR_EOF;
lsp->creader = XP_NULL;
lsp->creader_extra = XP_NULL;
lsp->creader_just_set = 0;
lsp->outstream = xp_stdout;
lsp->mem = xp_lsp_mem_new (mem_ubound, mem_ubound_inc);
if (lsp->mem == XP_NULL) {
xp_lsp_token_free (lsp->token);
if (lsp->__malloced) xp_free (lsp);
return XP_NULL;
}
if (xp_lsp_add_prims (lsp->mem) == -1) {
xp_lsp_mem_free (lsp->mem);
xp_lsp_token_free (lsp->token);
if (lsp->__malloced) xp_free (lsp);
return XP_NULL;
}
return lsp;
}
void xp_lsp_close (xp_lsp_t* lsp)
{
xp_assert (lsp != XP_NULL);
xp_lsp_mem_free (lsp->mem);
xp_lsp_token_free (lsp->token);
if (lsp->__malloced) xp_free (lsp);
}
intxp_lsp_error xp_lsp_t* lsp, xp_char_t* buf, xp_size_t size)
{
if (buf != XP_NULL || size == 0) return lsp->error;
// TODO:...
/*
switch (lsp->error) {
default:
xp_lsp_copy_string (buf, size, "unknown error");
}
*/
return lsp->error;
}

77
ase/lsp/lsp.h
View File

@ -1,5 +1,5 @@
/* /*
* $Id: lsp.h,v 1.4 2005-09-18 08:10:50 bacon Exp $ * $Id: lsp.h,v 1.5 2005-09-18 10:18:35 bacon Exp $
*/ */
#ifndef _XP_LSP_LSP_H_ #ifndef _XP_LSP_LSP_H_
@ -17,21 +17,17 @@
#include <xp/lsp/object.h> #include <xp/lsp/object.h>
#include <xp/lsp/memory.h> #include <xp/lsp/memory.h>
#include <xp/bas/stdio.h> // TODO: may have to remove dependency on stdio? #define XP_LSP_ERR(lsp) ((lsp)->errnum)
// NOTICE: the function of xp_lsp_creader_t must return -1 on error
// and 0 on success. the first argument must be set to
// XP_LSP_END_CHAR at the end of input.
typedef int (*xp_lsp_creader_t) (xp_cint_t*, void*);
#define XP_LSP_ERR(lsp) ((lsp)->error)
enum enum
{ {
XP_LSP_ERR_NONE = 0, XP_LSP_ERR_NONE = 0,
XP_LSP_ERR_ABORT, XP_LSP_ERR_ABORT,
XP_LSP_ERR_END, XP_LSP_ERR_END,
XP_LSP_ERR_MEM, XP_LSP_ERR_MEM,
XP_LSP_ERR_READ, XP_LSP_ERR_INPUT_NOT_ATTACHED,
XP_LSP_ERR_INPUT,
XP_LSP_ERR_OUTPUT_NOT_ATTACHED,
XP_LSP_ERR_OUTPUT,
XP_LSP_ERR_SYNTAX, XP_LSP_ERR_SYNTAX,
XP_LSP_ERR_BAD_ARG, XP_LSP_ERR_BAD_ARG,
XP_LSP_ERR_WRONG_ARG, XP_LSP_ERR_WRONG_ARG,
@ -46,6 +42,15 @@ enum
XP_LSP_ERR_BAD_VALUE XP_LSP_ERR_BAD_VALUE
}; };
typedef int (*xp_lsp_io_t) (int cmd, void* owner, void* arg);
enum
{
XP_LSP_IO_OPEN,
XP_LSP_IO_CLOSE,
XP_LSP_IO_CHAR,
XP_LSP_IO_STR
};
/* /*
* STRUCT: xp_lsp_t * STRUCT: xp_lsp_t
* Defines the lisp object * Defines the lisp object
@ -53,22 +58,20 @@ enum
struct xp_lsp_t struct xp_lsp_t
{ {
/* error number */ /* error number */
int error; int errnum;
int opt_undef_symbol; int opt_undef_symbol;
/* for read */ /* for read */
xp_cint_t curc; xp_cint_t curc;
xp_lsp_creader_t creader; xp_lsp_token_t token;
void* creader_extra;
int creader_just_set;
xp_lsp_token_t* token;
/* for eval */ /* for eval */
xp_size_t max_eval_depth; // TODO:.... xp_size_t max_eval_depth; // TODO:....
xp_size_t eval_depth; xp_size_t eval_depth;
/* for print */ /* io functions */
XP_FILE* outstream; xp_lsp_io_t input_func;
xp_lsp_io_t output_func;
/* memory manager */ /* memory manager */
xp_lsp_mem_t* mem; xp_lsp_mem_t* mem;
@ -87,6 +90,7 @@ extern "C" {
*/ */
xp_lsp_t* xp_lsp_open (xp_lsp_t* lisp, xp_lsp_t* xp_lsp_open (xp_lsp_t* lisp,
xp_size_t mem_ubound, xp_size_t mem_ubound_inc); xp_size_t mem_ubound, xp_size_t mem_ubound_inc);
/* /*
* FUNCTION: xp_lsp_close * FUNCTION: xp_lsp_close
* Destroys the lisp object * Destroys the lisp object
@ -96,18 +100,45 @@ xp_lsp_t* xp_lsp_open (xp_lsp_t* lisp,
*/ */
void xp_lsp_close (xp_lsp_t* lsp); void xp_lsp_close (xp_lsp_t* lsp);
/*
* FUNCTION: xp_lsp_error
*/
int xp_lsp_error (xp_lsp_t* lsp, xp_char_t* buf, xp_size_t size); int xp_lsp_error (xp_lsp_t* lsp, xp_char_t* buf, xp_size_t size);
/* read.c */ /*
// TODO: move xp_lsp_set_creader to lsp.c * FUNCTION: xp_lsp_attach_input
void xp_lsp_set_creader (xp_lsp_t* lsp, xp_lsp_creader_t func, void* extra); */
int xp_lsp_attach_input (xp_lsp_t* lsp, xp_lsp_io_t input);
/*
* FUNCTION: xp_lsp_detach_input
*/
int xp_lsp_detach_input (xp_lsp_t* lsp);
/*
* FUNCTION: xp_lsp_attach_output
*/
int xp_lsp_attach_output (xp_lsp_t* lsp, xp_lsp_io_t output);
/*
* FUNCTION: xp_lsp_detach_output
*/
int xp_lsp_detach_output (xp_lsp_t* lsp);
/*
* FUNCTION: xp_lsp_read
*/
xp_lsp_obj_t* xp_lsp_read (xp_lsp_t* lsp); xp_lsp_obj_t* xp_lsp_read (xp_lsp_t* lsp);
/* eval.c */ /*
* FUNCTION: xp_lsp_eval
*/
xp_lsp_obj_t* xp_lsp_eval (xp_lsp_t* lsp, xp_lsp_obj_t* obj); xp_lsp_obj_t* xp_lsp_eval (xp_lsp_t* lsp, xp_lsp_obj_t* obj);
/* print.c */ /*
void xp_lsp_print (xp_lsp_t* lsp, xp_lsp_obj_t* obj); * FUNCTION: xp_lsp_print
*/
int xp_lsp_print (xp_lsp_t* lsp, const xp_lsp_obj_t* obj);
#ifdef __cplusplus #ifdef __cplusplus
} }