1261 lines
30 KiB
C
1261 lines
30 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of Mes.
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*
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* Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if __GNUC__
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#include "mlibc.c"
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#endif
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#define assert(x) ((x) ? (void)0 : assert_fail (#x))
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#define MES_MINI 1
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#define FIXED_PRIMITIVES 0
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#if __GNUC__
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#define FIXME_NYACC 1
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#define __NYACC__ 0
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#define NYACC_CAR
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#define NYACC_CDR
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#else
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#define __NYACC__ 1
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#define NYACC_CAR nyacc_car
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#define NYACC_CDR nyacc_cdr
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#endif
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int ARENA_SIZE = 1200000;
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char arena[1200000];
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typedef int SCM;
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int g_debug = 0;
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int g_free = 0;
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SCM g_continuations = 0;
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SCM g_symbols = 0;
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SCM g_stack = 0;
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// a/env
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SCM r0 = 0;
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// param 1
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SCM r1 = 0;
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// save 2+load/dump
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SCM r2 = 0;
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// continuation
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SCM r3 = 0;
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enum type_t {TCHAR, TCLOSURE, TCONTINUATION, TFUNCTION, TKEYWORD, TMACRO, TNUMBER, TPAIR, TREF, TSPECIAL, TSTRING, TSYMBOL, TVALUES, TVECTOR, TBROKEN_HEART};
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struct scm {
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enum type_t type;
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SCM car;
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SCM cdr;
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};
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typedef int (*f_t) (void);
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struct function {
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int (*function) (void);
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int arity;
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char *name;
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};
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struct scm *g_cells = arena;
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//FIXME
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//struct scm *g_news = 0;
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struct scm scm_nil = {TSPECIAL, "()",0};
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struct scm scm_f = {TSPECIAL, "#f",0};
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struct scm scm_t = {TSPECIAL, "#t",0};
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struct scm scm_dot = {TSPECIAL, ".",0};
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struct scm scm_arrow = {TSPECIAL, "=>",0};
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struct scm scm_undefined = {TSPECIAL, "*undefined*",0};
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struct scm scm_unspecified = {TSPECIAL, "*unspecified*",0};
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struct scm scm_closure = {TSPECIAL, "*closure*",0};
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struct scm scm_circular = {TSPECIAL, "*circular*",0};
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struct scm scm_begin = {TSPECIAL, "*begin*",0};
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struct scm scm_symbol_dot = {TSYMBOL, "*dot*",0};
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struct scm scm_symbol_lambda = {TSYMBOL, "lambda",0};
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struct scm scm_symbol_begin = {TSYMBOL, "begin",0};
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struct scm scm_symbol_if = {TSYMBOL, "if",0};
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struct scm scm_symbol_quote = {TSYMBOL, "quote",0};
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struct scm scm_symbol_set_x = {TSYMBOL, "set!",0};
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struct scm scm_symbol_sc_expand = {TSYMBOL, "sc-expand",0};
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struct scm scm_symbol_macro_expand = {TSYMBOL, "macro-expand",0};
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struct scm scm_symbol_sc_expander_alist = {TSYMBOL, "*sc-expander-alist*",0};
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struct scm scm_symbol_call_with_values = {TSYMBOL, "call-with-values",0};
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struct scm scm_call_with_current_continuation = {TSPECIAL, "*call/cc*",0};
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struct scm scm_symbol_call_with_current_continuation = {TSYMBOL, "call-with-current-continuation",0};
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struct scm scm_symbol_current_module = {TSYMBOL, "current-module",0};
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struct scm scm_symbol_primitive_load = {TSYMBOL, "primitive-load",0};
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struct scm scm_symbol_read_input_file = {TSYMBOL, "read-input-file",0};
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struct scm scm_symbol_write = {TSYMBOL, "write",0};
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struct scm scm_symbol_display = {TSYMBOL, "display",0};
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struct scm scm_symbol_throw = {TSYMBOL, "throw",0};
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struct scm scm_symbol_not_a_pair = {TSYMBOL, "not-a-pair",0};
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struct scm scm_symbol_system_error = {TSYMBOL, "system-error",0};
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struct scm scm_symbol_wrong_number_of_args = {TSYMBOL, "wrong-number-of-args",0};
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struct scm scm_symbol_wrong_type_arg = {TSYMBOL, "wrong-type-arg",0};
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struct scm scm_symbol_unbound_variable = {TSYMBOL, "unbound-variable",0};
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struct scm scm_symbol_argv = {TSYMBOL, "%argv",0};
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struct scm scm_symbol_mes_prefix = {TSYMBOL, "%prefix",0};
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struct scm scm_symbol_mes_version = {TSYMBOL, "%version",0};
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struct scm scm_symbol_car = {TSYMBOL, "car",0};
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struct scm scm_symbol_cdr = {TSYMBOL, "cdr",0};
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struct scm scm_symbol_null_p = {TSYMBOL, "null?",0};
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struct scm scm_symbol_eq_p = {TSYMBOL, "eq?",0};
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struct scm scm_symbol_cons = {TSYMBOL, "cons",0};
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struct scm scm_vm_evlis = {TSPECIAL, "*vm-evlis*",0};
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struct scm scm_vm_evlis2 = {TSPECIAL, "*vm-evlis2*",0};
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struct scm scm_vm_evlis3 = {TSPECIAL, "*vm-evlis3*",0};
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struct scm scm_vm_apply = {TSPECIAL, "core:apply",0};
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struct scm scm_vm_apply2 = {TSPECIAL, "*vm-apply2*",0};
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struct scm scm_vm_eval = {TSPECIAL, "core:eval",0};
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//FIXED_PRIMITIVES
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struct scm scm_vm_eval_car = {TSPECIAL, "*vm-eval-car*",0};
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struct scm scm_vm_eval_cdr = {TSPECIAL, "*vm-eval-cdr*",0};
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struct scm scm_vm_eval_cons = {TSPECIAL, "*vm-eval-cons*",0};
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struct scm scm_vm_eval_null_p = {TSPECIAL, "*vm-eval-null-p*",0};
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struct scm scm_vm_eval_set_x = {TSPECIAL, "*vm-eval-set!*",0};
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struct scm scm_vm_eval_macro = {TSPECIAL, "*vm-eval-macro*",0};
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struct scm scm_vm_eval2 = {TSPECIAL, "*vm-eval2*",0};
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struct scm scm_vm_macro_expand = {TSPECIAL, "core:macro-expand",0};
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struct scm scm_vm_begin = {TSPECIAL, "*vm-begin*",0};
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struct scm scm_vm_begin_read_input_file = {TSPECIAL, "*vm-begin-read-input-file*",0};
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struct scm scm_vm_begin2 = {TSPECIAL, "*vm-begin2*",0};
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struct scm scm_vm_if = {TSPECIAL, "*vm-if*",0};
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struct scm scm_vm_if_expr = {TSPECIAL, "*vm-if-expr*",0};
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struct scm scm_vm_call_with_values2 = {TSPECIAL, "*vm-call-with-values2*",0};
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struct scm scm_vm_call_with_current_continuation2 = {TSPECIAL, "*vm-call-with-current-continuation2*",0};
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struct scm scm_vm_return = {TSPECIAL, "*vm-return*",0};
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struct scm scm_test = {TSYMBOL, "test",0};
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#include "mini-mes.symbols.h"
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SCM tmp;
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SCM tmp_num;
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SCM tmp_num2;
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struct function g_functions[200];
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int g_function = 0;
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// #include "lib.h"
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// #include "math.h"
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#include "mini-mes.h"
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// #include "posix.h"
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// #include "reader.h"
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#define TYPE(x) (g_cells[x].type)
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#define CAR(x) g_cells[x].car
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#define LENGTH(x) g_cells[x].car
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#define STRING(x) g_cells[x].car
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#define CDR(x) g_cells[x].cdr
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#define CLOSURE(x) g_cells[x].cdr
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#define CONTINUATION(x) g_cells[x].cdr
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#if __GNUC__
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//#define FUNCTION(x) g_functions[g_cells[x].function]
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#endif
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#define FUNCTION(x) g_functions[g_cells[x].cdr]
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#define MACRO(x) g_cells[x].car
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#define VALUE(x) g_cells[x].cdr
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#define VECTOR(x) g_cells[x].cdr
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#define MAKE_CHAR(n) make_cell (tmp_num_ (TCHAR), 0, tmp_num2_ (n))
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#define MAKE_CONTINUATION(n) make_cell (tmp_num_ (TCONTINUATION), n, g_stack)
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#define MAKE_NUMBER(n) make_cell (tmp_num_ (TNUMBER), 0, tmp_num2_ (n))
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//#define MAKE_REF(n) make_cell (tmp_num_ (REF), n, 0)
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#define CAAR(x) CAR (CAR (x))
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#define CDAR(x) CDR (CAR (x))
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#define CADAR(x) CAR (CDR (CAR (x)))
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#define CADDR(x) CAR (CDR (CDR (x)))
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// #define CDDDR(x) CDR (CDR (CDR (x)))
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#define CDADAR(x) CAR (CDR (CAR (CDR (x))))
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#define CADR(x) CAR (CDR (x))
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#define MAKE_STRING(x) make_cell (tmp_num_ (TSTRING), x, 0)
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SCM
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alloc (int n)
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{
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#if __GNUC__
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assert (g_free + n < ARENA_SIZE);
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#endif
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SCM x = g_free;
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g_free += n;
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return x;
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}
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#define DEBUG 0
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SCM
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make_cell (SCM type, SCM car, SCM cdr)
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{
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SCM x = alloc (1);
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#if __GNUC__
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assert (TYPE (type) == TNUMBER);
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#endif
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TYPE (x) = VALUE (type);
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if (VALUE (type) == TCHAR || VALUE (type) == TNUMBER) {
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if (car) CAR (x) = CAR (car);
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if (cdr) CDR(x) = CDR(cdr);
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}
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else if (VALUE (type) == TFUNCTION) {
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if (car) CAR (x) = car;
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if (cdr) CDR(x) = CDR(cdr);
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}
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else {
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CAR (x) = car;
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CDR(x) = cdr;
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}
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return x;
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}
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SCM
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tmp_num_ (int x)
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{
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VALUE (tmp_num) = x;
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return tmp_num;
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}
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SCM
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tmp_num2_ (int x)
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{
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VALUE (tmp_num2) = x;
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return tmp_num2;
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}
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SCM
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cons (SCM x, SCM y)
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{
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VALUE (tmp_num) = TPAIR;
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return make_cell (tmp_num, x, y);
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}
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SCM
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car (SCM x)
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{
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#if MES_MINI
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//Nyacc
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//assert ("!car");
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#else
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if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
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#endif
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return CAR (x);
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}
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SCM
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cdr (SCM x)
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{
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#if MES_MINI
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//Nyacc
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//assert ("!cdr");
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#else
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if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
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#endif
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return CDR(x);
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}
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SCM
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null_p (SCM x)
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{
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return x == cell_nil ? cell_t : cell_f;
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}
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SCM
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eq_p (SCM x, SCM y)
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{
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return (x == y
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|| ((TYPE (x) == TKEYWORD && TYPE (y) == TKEYWORD
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&& STRING (x) == STRING (y)))
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|| (TYPE (x) == TCHAR && TYPE (y) == TCHAR
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&& VALUE (x) == VALUE (y))
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|| (TYPE (x) == TNUMBER && TYPE (y) == TNUMBER
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&& VALUE (x) == VALUE (y)))
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? cell_t : cell_f;
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}
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SCM
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type_ (SCM x)
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{
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return MAKE_NUMBER (TYPE (x));
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}
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SCM
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car_ (SCM x)
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{
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return (TYPE (x) != TCONTINUATION
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&& (TYPE (CAR (x)) == TPAIR // FIXME: this is weird
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|| TYPE (CAR (x)) == TREF
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|| TYPE (CAR (x)) == TSPECIAL
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|| TYPE (CAR (x)) == TSYMBOL
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|| TYPE (CAR (x)) == TSTRING)) ? CAR (x) : MAKE_NUMBER (CAR (x));
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}
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SCM
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cdr_ (SCM x)
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{
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return (TYPE (CDR (x)) == TPAIR
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|| TYPE (CDR (x)) == TREF
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|| TYPE (CAR (x)) == TSPECIAL
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|| TYPE (CDR (x)) == TSYMBOL
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|| TYPE (CDR (x)) == TSTRING) ? CDR (x) : MAKE_NUMBER (CDR (x));
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}
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SCM
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assert_defined (SCM x, SCM e) ///((internal))
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{
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if (e != cell_undefined) return e;
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// error (cell_symbol_unbound_variable, x);
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puts ("unbound variable");
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exit (33);
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return e;
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}
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SCM
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gc_push_frame () ///((internal))
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{
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SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
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g_stack = cons (frame, g_stack);
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return g_stack;
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}
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SCM
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append2 (SCM x, SCM y)
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{
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if (x == cell_nil) return y;
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#if __GNUC__
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assert (TYPE (x) == TPAIR);
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#endif
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return cons (car (x), append2 (cdr (x), y));
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}
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SCM
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pairlis (SCM x, SCM y, SCM a)
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{
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if (x == cell_nil)
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return a;
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if (TYPE (x) != TPAIR)
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return cons (cons (x, y), a);
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return cons (cons (car (x), car (y)),
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pairlis (cdr (x), cdr (y), a));
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}
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SCM display_ (SCM);
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SCM
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call (SCM fn, SCM x)
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{
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if ((FUNCTION (fn).arity > 0 || FUNCTION (fn).arity == -1)
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&& x != cell_nil && TYPE (CAR (x)) == TVALUES)
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x = cons (CADAR (x), CDR (x));
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if ((FUNCTION (fn).arity > 1 || FUNCTION (fn).arity == -1)
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&& x != cell_nil && TYPE (CDR (x)) == TPAIR && TYPE (CADR (x)) == TVALUES)
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x = cons (CAR (x), cons (CDADAR (x), CDR (x)));
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switch (FUNCTION (fn).arity)
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{
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case 0: {return (FUNCTION (fn).function) ();}
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case 1: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (car (x));}
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case 2: {return ((SCM(*)(SCM,SCM))(FUNCTION (fn).function)) (car (x), cadr (x));}
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case 3: {return ((SCM(*)(SCM,SCM,SCM))(FUNCTION (fn).function)) (car (x), cadr (x), car (cddr (x)));}
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||
case -1: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (x);}
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||
default: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (x);}
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||
}
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||
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||
return cell_unspecified;
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||
}
|
||
|
||
SCM
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assq (SCM x, SCM a)
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||
{
|
||
//FIXME: eq_p
|
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//while (a != cell_nil && eq_p (x, CAAR (a)) == cell_f) a = CDR (a);
|
||
while (a != cell_nil && x != CAAR (a)) a = CDR (a);
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||
return a != cell_nil ? car (a) : cell_f;
|
||
}
|
||
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SCM
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||
assq_ref_env (SCM x, SCM a)
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||
{
|
||
x = assq (x, a);
|
||
if (x == cell_f) return cell_undefined;
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return cdr (x);
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}
|
||
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SCM
|
||
set_car_x (SCM x, SCM e)
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||
{
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||
#if __GNUC__
|
||
assert (TYPE (x) == TPAIR);
|
||
#endif
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||
CAR (x) = e;
|
||
return cell_unspecified;
|
||
}
|
||
|
||
SCM
|
||
set_cdr_x (SCM x, SCM e)
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||
{
|
||
//if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_set_cdr_x));
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CDR (x) = e;
|
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return cell_unspecified;
|
||
}
|
||
|
||
SCM
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set_env_x (SCM x, SCM e, SCM a)
|
||
{
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SCM p = assert_defined (x, assq (x, a));
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//if (TYPE (p) != TPAIR) error (cell_symbol_not_a_pair, cons (p, x));
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return set_cdr_x (p, e);
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}
|
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|
||
SCM
|
||
call_lambda (SCM e, SCM x, SCM aa, SCM a) ///((internal))
|
||
{
|
||
SCM cl = cons (cons (cell_closure, x), x);
|
||
cl = cons (cons (cell_closure, x), x);
|
||
r1 = e;
|
||
r0 = cl;
|
||
return cell_unspecified;
|
||
}
|
||
|
||
SCM
|
||
make_closure (SCM args, SCM body, SCM a)
|
||
{
|
||
return make_cell (tmp_num_ (TCLOSURE), cell_f, cons (cons (cell_circular, a), cons (args, body)));
|
||
}
|
||
|
||
SCM
|
||
lookup_macro (SCM x, SCM a)
|
||
{
|
||
if (TYPE (x) != TSYMBOL) return cell_f;
|
||
SCM m = assq_ref_env (x, a);
|
||
if (TYPE (m) == TMACRO) return MACRO (m);
|
||
return cell_f;
|
||
}
|
||
|
||
SCM
|
||
push_cc (SCM p1, SCM p2, SCM a, SCM c) ///((internal))
|
||
{
|
||
SCM x = r3;
|
||
r3 = c;
|
||
r2 = p2;
|
||
gc_push_frame ();
|
||
r1 = p1;
|
||
r0 = a;
|
||
r3 = x;
|
||
return cell_unspecified;
|
||
}
|
||
|
||
SCM caar (SCM x) {return car (car (x));}
|
||
SCM cadr (SCM x) {return car (cdr (x));}
|
||
SCM cdar (SCM x) {return cdr (car (x));}
|
||
SCM cddr (SCM x) {return cdr (cdr (x));}
|
||
|
||
SCM gc_pop_frame (); //((internal))
|
||
|
||
SCM
|
||
eval_apply ()
|
||
{
|
||
eval_apply:
|
||
// if (g_free + GC_SAFETY > ARENA_SIZE)
|
||
// gc_pop_frame (gc (gc_push_frame ()));
|
||
|
||
switch (r3)
|
||
{
|
||
case cell_vm_evlis: goto evlis;
|
||
case cell_vm_evlis2: goto evlis2;
|
||
case cell_vm_evlis3: goto evlis3;
|
||
case cell_vm_apply: goto apply;
|
||
case cell_vm_apply2: goto apply2;
|
||
case cell_vm_eval: goto eval;
|
||
#if FIXED_PRIMITIVES
|
||
case cell_vm_eval_car: goto eval_car;
|
||
case cell_vm_eval_cdr: goto eval_cdr;
|
||
case cell_vm_eval_cons: goto eval_cons;
|
||
case cell_vm_eval_null_p: goto eval_null_p;
|
||
#endif
|
||
case cell_vm_eval_set_x: goto eval_set_x;
|
||
case cell_vm_eval_macro: goto eval_macro;
|
||
case cell_vm_eval2: goto eval2;
|
||
case cell_vm_macro_expand: goto macro_expand;
|
||
case cell_vm_begin: goto begin;
|
||
///case cell_vm_begin_read_input_file: goto begin_read_input_file;
|
||
case cell_vm_begin2: goto begin2;
|
||
case cell_vm_if: goto vm_if;
|
||
case cell_vm_if_expr: goto if_expr;
|
||
case cell_vm_call_with_current_continuation2: goto call_with_current_continuation2;
|
||
case cell_vm_call_with_values2: goto call_with_values2;
|
||
case cell_vm_return: goto vm_return;
|
||
case cell_unspecified: return r1;
|
||
default: assert (0);
|
||
}
|
||
|
||
SCM x = cell_nil;
|
||
SCM y = cell_nil;
|
||
evlis:
|
||
if (r1 == cell_nil) goto vm_return;
|
||
if (TYPE (r1) != TPAIR) goto eval;
|
||
push_cc (car (r1), r1, r0, cell_vm_evlis2);
|
||
goto eval;
|
||
evlis2:
|
||
push_cc (cdr (r2), r1, r0, cell_vm_evlis3);
|
||
goto evlis;
|
||
evlis3:
|
||
r1 = cons (r2, r1);
|
||
goto vm_return;
|
||
|
||
apply:
|
||
switch (TYPE (car (r1)))
|
||
{
|
||
case TFUNCTION: {
|
||
//check_formals (car (r1), MAKE_NUMBER (FUNCTION (car (r1)).arity), cdr (r1));
|
||
r1 = call (car (r1), cdr (r1)); /// FIXME: move into eval_apply
|
||
goto vm_return;
|
||
}
|
||
case TCLOSURE:
|
||
{
|
||
SCM cl = CLOSURE (car (r1));
|
||
SCM formals = cadr (cl);
|
||
SCM body = cddr (cl);
|
||
SCM aa = cdar (cl);
|
||
aa = cdr (aa);
|
||
//check_formals (car (r1), formals, cdr (r1));
|
||
SCM p = pairlis (formals, cdr (r1), aa);
|
||
call_lambda (body, p, aa, r0);
|
||
goto begin;
|
||
}
|
||
case TCONTINUATION:
|
||
{
|
||
x = r1;
|
||
g_stack = CONTINUATION (CAR (r1));
|
||
gc_pop_frame ();
|
||
r1 = cadr (x);
|
||
goto eval_apply;
|
||
}
|
||
case TSPECIAL:
|
||
{
|
||
switch (car (r1))
|
||
{
|
||
case cell_vm_apply:
|
||
{
|
||
push_cc (cons (CADR (r1), CADDR (r1)), r1, r0, cell_vm_return);
|
||
goto apply;
|
||
}
|
||
case cell_vm_eval:
|
||
{
|
||
push_cc (CADR (r1), r1, CADDR (r1), cell_vm_return);
|
||
goto eval;
|
||
}
|
||
case cell_call_with_current_continuation:
|
||
{
|
||
r1 = cdr (r1);
|
||
goto call_with_current_continuation;
|
||
}
|
||
//default: check_apply (cell_f, car (r1));
|
||
}
|
||
}
|
||
case TSYMBOL:
|
||
{
|
||
if (car (r1) == cell_symbol_call_with_values)
|
||
{
|
||
r1 = cdr (r1);
|
||
goto call_with_values;
|
||
}
|
||
if (car (r1) == cell_symbol_current_module)
|
||
{
|
||
r1 = r0;
|
||
goto vm_return;
|
||
}
|
||
break;
|
||
}
|
||
case TPAIR:
|
||
{
|
||
switch (caar (r1))
|
||
{
|
||
case cell_symbol_lambda:
|
||
{
|
||
SCM formals = cadr (car (r1));
|
||
SCM body = cddr (car (r1));
|
||
SCM p = pairlis (formals, cdr (r1), r0);
|
||
//check_formals (r1, formals, cdr (r1));
|
||
call_lambda (body, p, p, r0);
|
||
goto begin;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
push_cc (car (r1), r1, r0, cell_vm_apply2);
|
||
goto eval;
|
||
apply2:
|
||
//check_apply (r1, car (r2));
|
||
r1 = cons (r1, cdr (r2));
|
||
goto apply;
|
||
|
||
eval:
|
||
switch (TYPE (r1))
|
||
{
|
||
case TPAIR:
|
||
{
|
||
switch (car (r1))
|
||
{
|
||
#if FIXED_PRIMITIVES
|
||
case cell_symbol_car:
|
||
{
|
||
push_cc (CADR (r1), r1, r0, cell_vm_eval_car); goto eval;
|
||
eval_car:
|
||
x = r1; gc_pop_frame (); r1 = car (x); goto eval_apply;
|
||
}
|
||
case cell_symbol_cdr:
|
||
{
|
||
push_cc (CADR (r1), r1, r0, cell_vm_eval_cdr); goto eval;
|
||
eval_cdr:
|
||
x = r1; gc_pop_frame (); r1 = cdr (x); goto eval_apply;
|
||
}
|
||
case cell_symbol_cons: {
|
||
push_cc (CDR (r1), r1, r0, cell_vm_eval_cons); goto evlis;
|
||
eval_cons:
|
||
x = r1;
|
||
gc_pop_frame ();
|
||
r1 = cons (CAR (x), CADR (x));
|
||
goto eval_apply;
|
||
}
|
||
case cell_symbol_null_p:
|
||
{
|
||
push_cc (CADR (r1), r1, r0, cell_vm_eval_null_p);
|
||
goto eval;
|
||
eval_null_p:
|
||
x = r1; gc_pop_frame (); r1 = null_p (x); goto eval_apply;
|
||
}
|
||
#endif // FIXED_PRIMITIVES
|
||
case cell_symbol_quote:
|
||
{
|
||
x = r1; gc_pop_frame (); r1 = cadr (x); goto eval_apply;
|
||
}
|
||
case cell_symbol_begin: goto begin;
|
||
case cell_symbol_lambda:
|
||
{
|
||
r1 = make_closure (cadr (r1), cddr (r1), assq (cell_closure, r0));
|
||
goto vm_return;
|
||
}
|
||
case cell_symbol_if: {r1=cdr (r1); goto vm_if;}
|
||
case cell_symbol_set_x:
|
||
{
|
||
push_cc (car (cddr (r1)), r1, r0, cell_vm_eval_set_x);
|
||
goto eval;
|
||
eval_set_x:
|
||
x = r2;
|
||
r1 = set_env_x (cadr (x), r1, r0);
|
||
goto vm_return;
|
||
}
|
||
case cell_vm_macro_expand:
|
||
{
|
||
push_cc (cadr (r1), r1, r0, cell_vm_return);
|
||
goto macro_expand;
|
||
}
|
||
default: {
|
||
push_cc (r1, r1, r0, cell_vm_eval_macro);
|
||
goto macro_expand;
|
||
eval_macro:
|
||
x = r2;
|
||
if (r1 != r2)
|
||
{
|
||
if (TYPE (r1) == TPAIR)
|
||
{
|
||
set_cdr_x (r2, cdr (r1));
|
||
set_car_x (r2, car (r1));
|
||
}
|
||
goto eval;
|
||
}
|
||
push_cc (CDR (r1), r1, r0, cell_vm_eval2); goto evlis;
|
||
eval2:
|
||
r1 = cons (car (r2), r1);
|
||
goto apply;
|
||
}
|
||
}
|
||
}
|
||
case TSYMBOL:
|
||
{
|
||
r1 = assert_defined (r1, assq_ref_env (r1, r0));
|
||
goto vm_return;
|
||
}
|
||
default: {goto vm_return;}
|
||
}
|
||
|
||
SCM macro;
|
||
SCM expanders;
|
||
macro_expand:
|
||
if (TYPE (r1) == TPAIR
|
||
&& (macro = lookup_macro (car (r1), r0)) != cell_f)
|
||
{
|
||
r1 = cons (macro, CDR (r1));
|
||
goto apply;
|
||
}
|
||
else if (TYPE (r1) == TPAIR
|
||
&& TYPE (CAR (r1)) == TSYMBOL
|
||
&& ((expanders = assq_ref_env (cell_symbol_sc_expander_alist, r0)) != cell_undefined)
|
||
&& ((macro = assq (CAR (r1), expanders)) != cell_f))
|
||
{
|
||
SCM sc_expand = assq_ref_env (cell_symbol_macro_expand, r0);
|
||
if (sc_expand != cell_undefined && sc_expand != cell_f)
|
||
{
|
||
r1 = cons (sc_expand, cons (r1, cell_nil));
|
||
goto apply;
|
||
}
|
||
}
|
||
goto vm_return;
|
||
begin:
|
||
x = cell_unspecified;
|
||
while (r1 != cell_nil) {
|
||
if (TYPE (r1) == TPAIR && TYPE (CAR (r1)) == TPAIR)
|
||
{
|
||
if (caar (r1) == cell_symbol_begin)
|
||
r1 = append2 (cdar (r1), cdr (r1));
|
||
else if (caar (r1) == cell_symbol_primitive_load)
|
||
{
|
||
push_cc (cons (cell_symbol_read_input_file, cell_nil), r1, r0, cell_vm_begin_read_input_file);
|
||
goto apply;
|
||
begin_read_input_file:
|
||
r1 = append2 (r1, cdr (r2));
|
||
}
|
||
}
|
||
if (CDR (r1) == cell_nil)
|
||
{
|
||
r1 = car (r1);
|
||
goto eval;
|
||
}
|
||
push_cc (CAR (r1), r1, r0, cell_vm_begin2);
|
||
goto eval;
|
||
begin2:
|
||
x = r1;
|
||
r1 = CDR (r2);
|
||
}
|
||
r1 = x;
|
||
goto vm_return;
|
||
|
||
vm_if:
|
||
push_cc (car (r1), r1, r0, cell_vm_if_expr);
|
||
goto eval;
|
||
if_expr:
|
||
x = r1;
|
||
r1 = r2;
|
||
if (x != cell_f)
|
||
{
|
||
r1 = cadr (r1);
|
||
goto eval;
|
||
}
|
||
if (cddr (r1) != cell_nil)
|
||
{
|
||
r1 = car (cddr (r1));
|
||
goto eval;
|
||
}
|
||
r1 = cell_unspecified;
|
||
goto vm_return;
|
||
|
||
call_with_current_continuation:
|
||
gc_push_frame ();
|
||
#if __GNUC__
|
||
// FIXME GCC
|
||
x = MAKE_CONTINUATION (g_continuations++);
|
||
#else
|
||
x = MAKE_CONTINUATION (g_continuations);
|
||
g_continuations++;
|
||
#endif
|
||
gc_pop_frame ();
|
||
push_cc (cons (car (r1), cons (x, cell_nil)), x, r0, cell_vm_call_with_current_continuation2);
|
||
goto apply;
|
||
call_with_current_continuation2:
|
||
CONTINUATION (r2) = g_stack;
|
||
goto vm_return;
|
||
|
||
call_with_values:
|
||
push_cc (cons (car (r1), cell_nil), r1, r0, cell_vm_call_with_values2);
|
||
goto apply;
|
||
call_with_values2:
|
||
if (TYPE (r1) == TVALUES)
|
||
r1 = CDR (r1);
|
||
r1 = cons (cadr (r2), r1);
|
||
goto apply;
|
||
|
||
vm_return:
|
||
x = r1;
|
||
gc_pop_frame ();
|
||
r1 = x;
|
||
goto eval_apply;
|
||
}
|
||
|
||
SCM
|
||
gc_peek_frame () ///((internal))
|
||
{
|
||
SCM frame = car (g_stack);
|
||
r1 = car (frame);
|
||
r2 = cadr (frame);
|
||
r3 = car (cddr (frame));
|
||
r0 = cadr (cddr (frame));
|
||
return frame;
|
||
}
|
||
|
||
SCM
|
||
gc_pop_frame () ///((internal))
|
||
{
|
||
SCM frame = gc_peek_frame (g_stack);
|
||
g_stack = cdr (g_stack);
|
||
return frame;
|
||
}
|
||
|
||
SCM
|
||
mes_g_stack (SCM a) ///((internal))
|
||
{
|
||
r0 = a;
|
||
r1 = MAKE_CHAR (0);
|
||
r2 = MAKE_CHAR (0);
|
||
r3 = MAKE_CHAR (0);
|
||
g_stack = cons (cell_nil, cell_nil);
|
||
return r0;
|
||
}
|
||
|
||
// Environment setup
|
||
SCM
|
||
make_tmps (struct scm* cells)
|
||
{
|
||
tmp = g_free++;
|
||
cells[tmp].type = TCHAR;
|
||
tmp_num = g_free++;
|
||
cells[tmp_num].type = TNUMBER;
|
||
tmp_num2 = g_free++;
|
||
cells[tmp_num2].type = TNUMBER;
|
||
return 0;
|
||
}
|
||
|
||
SCM
|
||
make_symbol_ (SCM s)
|
||
{
|
||
VALUE (tmp_num) = TSYMBOL;
|
||
SCM x = make_cell (tmp_num, s, 0);
|
||
g_symbols = cons (x, g_symbols);
|
||
return x;
|
||
}
|
||
|
||
SCM
|
||
list_of_char_equal_p (SCM a, SCM b)
|
||
{
|
||
while (a != cell_nil && b != cell_nil && VALUE (car (a)) == VALUE (car (b))) {
|
||
#if __GNUC__
|
||
assert (TYPE (car (a)) == TCHAR);
|
||
assert (TYPE (car (b)) == TCHAR);
|
||
#endif
|
||
a = cdr (a);
|
||
b = cdr (b);
|
||
}
|
||
return (a == cell_nil && b == cell_nil) ? cell_t : cell_f;
|
||
}
|
||
|
||
SCM
|
||
lookup_symbol_ (SCM s)
|
||
{
|
||
SCM x = g_symbols;
|
||
#if !MES_MINI
|
||
while (x) {
|
||
if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) break;
|
||
x = cdr (x);
|
||
}
|
||
if (x) x = car (x);
|
||
#endif;
|
||
return x;
|
||
}
|
||
|
||
SCM
|
||
make_symbol (SCM s)
|
||
{
|
||
#if MES_MINI
|
||
return make_symbol_ (s);
|
||
#else
|
||
SCM x = lookup_symbol_ (s);
|
||
return x ? x : make_symbol_ (s);
|
||
#endif
|
||
}
|
||
|
||
SCM
|
||
cstring_to_list (char const* s)
|
||
{
|
||
char *x = s;
|
||
SCM p = cell_nil;
|
||
int i = strlen (s);
|
||
while (i--)
|
||
{
|
||
p = cons (MAKE_CHAR (s[i]), p);
|
||
x++;
|
||
}
|
||
return p;
|
||
}
|
||
|
||
SCM
|
||
acons (SCM key, SCM value, SCM alist)
|
||
{
|
||
return cons (cons (key, value), alist);
|
||
}
|
||
|
||
|
||
// MINI_MES: temp-lib
|
||
|
||
SCM
|
||
write_byte (SCM x) ///((arity . n))
|
||
{
|
||
SCM c = car (x);
|
||
SCM p = cdr (x);
|
||
int fd = 1;
|
||
if (TYPE (p) == TPAIR && TYPE (car (p)) == TNUMBER) fd = VALUE (car (p));
|
||
//FILE *f = fd == 1 ? stdout : stderr;
|
||
#if __GNUC__
|
||
assert (TYPE (c) == TNUMBER || TYPE (c) == TCHAR);
|
||
#endif
|
||
// fputc (VALUE (c), f);
|
||
char cc = VALUE (c);
|
||
write (1, (char*)&cc, fd);
|
||
return c;
|
||
}
|
||
|
||
SCM
|
||
display_ (SCM x)
|
||
{
|
||
// eputs ("<display>\n");
|
||
switch (TYPE (x))
|
||
{
|
||
case TCHAR:
|
||
{
|
||
//puts ("<char>\n");
|
||
puts ("#\\");
|
||
putchar (VALUE (x));
|
||
break;
|
||
}
|
||
case TFUNCTION:
|
||
{
|
||
puts ("#<procedure ");
|
||
///puts (FUNCTION (x).name ? FUNCTION (x).name : "?");
|
||
char *p = "?";
|
||
if (FUNCTION (x).name != 0)
|
||
p = FUNCTION (x).name;
|
||
puts (p);
|
||
puts ("[");
|
||
puts (itoa (CDR (x)));
|
||
puts ("]>");
|
||
break;
|
||
}
|
||
case TNUMBER:
|
||
{
|
||
//puts ("<number>\n");
|
||
puts (itoa (VALUE (x)));
|
||
break;
|
||
}
|
||
case TPAIR:
|
||
{
|
||
//puts ("<pair>\n");
|
||
//if (cont != cell_f) puts "(");
|
||
puts ("(");
|
||
if (x && x != cell_nil) display_ (CAR (x));
|
||
if (CDR (x) && CDR (x) != cell_nil)
|
||
{
|
||
if (TYPE (CDR (x)) != TPAIR)
|
||
puts (" . ");
|
||
display_ (CDR (x));
|
||
}
|
||
//if (cont != cell_f) puts (")");
|
||
puts (")");
|
||
break;
|
||
}
|
||
case TSPECIAL:
|
||
{
|
||
switch (x)
|
||
{
|
||
case 1: {puts ("()"); break;}
|
||
case 2: {puts ("#f"); break;}
|
||
case 3: {puts ("#t"); break;}
|
||
default:
|
||
{
|
||
puts ("<x:");
|
||
puts (itoa (x));
|
||
puts (">");
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case TSYMBOL:
|
||
{
|
||
SCM t = CAR (x);
|
||
while (t != cell_nil)
|
||
{
|
||
putchar (VALUE (CAR (t)));
|
||
t = CDR (t);
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
{
|
||
//puts ("<default>\n");
|
||
puts ("<");
|
||
puts (itoa (TYPE (x)));
|
||
puts (":");
|
||
puts (itoa (x));
|
||
puts (">");
|
||
break;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
// Jam Collector
|
||
SCM g_symbol_max;
|
||
|
||
SCM
|
||
gc_init_cells () ///((internal))
|
||
{
|
||
return 0;
|
||
// g_cells = (scm *)malloc (2*ARENA_SIZE*sizeof(scm));
|
||
|
||
// #if __NYACC__ || FIXME_NYACC
|
||
// TYPE (0) = TVECTOR;
|
||
// // #else
|
||
// // TYPE (0) = VECTOR;
|
||
// #endif
|
||
// LENGTH (0) = 1000;
|
||
// VECTOR (0) = 0;
|
||
// g_cells++;
|
||
// TYPE (0) = CHAR;
|
||
// VALUE (0) = 'c';
|
||
}
|
||
|
||
// INIT NEWS
|
||
|
||
SCM
|
||
mes_symbols () ///((internal))
|
||
{
|
||
gc_init_cells ();
|
||
// gc_init_news ();
|
||
|
||
#include "mini-mes.symbols.i"
|
||
|
||
g_symbol_max = g_free;
|
||
make_tmps (g_cells);
|
||
|
||
g_symbols = 0;
|
||
for (int i=1; i<g_symbol_max; i++)
|
||
g_symbols = cons (i, g_symbols);
|
||
|
||
SCM a = cell_nil;
|
||
|
||
#include "mini-mes.symbol-names.i"
|
||
|
||
// a = acons (cell_symbol_mes_version, MAKE_STRING (cstring_to_list (VERSION)), a);
|
||
// a = acons (cell_symbol_mes_prefix, MAKE_STRING (cstring_to_list (PREFIX)), a);
|
||
|
||
a = acons (cell_symbol_dot, cell_dot, a);
|
||
a = acons (cell_symbol_begin, cell_begin, a);
|
||
a = acons (cell_closure, a, a);
|
||
|
||
// a = acons (cell_symbol_call_with_current_continuation, cell_call_with_current_continuation, a);
|
||
// a = acons (cell_symbol_sc_expand, cell_f, a);
|
||
|
||
return a;
|
||
}
|
||
|
||
SCM
|
||
mes_environment () ///((internal))
|
||
{
|
||
SCM a = 0;
|
||
a = mes_symbols ();
|
||
a = mes_g_stack (a);
|
||
return a;
|
||
}
|
||
|
||
SCM
|
||
mes_builtins (SCM a) ///((internal))
|
||
{
|
||
#include "mini-mes.i"
|
||
|
||
// #include "lib.i"
|
||
// #include "math.i"
|
||
// #include "posix.i"
|
||
// #include "reader.i"
|
||
|
||
// #include "lib.environment.i"
|
||
// #include "math.environment.i"
|
||
#include "mini-mes.environment.i"
|
||
// #include "posix.environment.i"
|
||
// #include "reader.environment.i"
|
||
|
||
return a;
|
||
}
|
||
|
||
SCM
|
||
bload_env (SCM a) ///((internal))
|
||
{
|
||
char *mo = "module/mes/read-0-32.mo";
|
||
g_stdin = open (mo, 0);
|
||
if (g_stdin < 0) {eputs ("no such file: ");eputs (mo);eputs ("\n");return 1;}
|
||
assert (getchar () == 'M');
|
||
assert (getchar () == 'E');
|
||
assert (getchar () == 'S');
|
||
eputs ("*GOT MES*\n");
|
||
g_stack = getchar () << 8;
|
||
g_stack += getchar ();
|
||
|
||
char *p = (char*)g_cells;
|
||
int c = getchar ();
|
||
while (c != -1)
|
||
{
|
||
*p++ = c;
|
||
c = getchar ();
|
||
}
|
||
g_free = (p-(char*)g_cells) / sizeof (struct scm);
|
||
gc_peek_frame ();
|
||
g_symbols = r1;
|
||
g_stdin = STDIN;
|
||
r0 = mes_builtins (r0);
|
||
#if 1
|
||
puts ("symbols: ");
|
||
SCM s = g_symbols;
|
||
while (s && s != cell_nil) {
|
||
display_ (CAR (s));
|
||
puts (" ");
|
||
s = CDR (s);
|
||
}
|
||
puts ("\n");
|
||
puts ("functions: ");
|
||
puts (itoa (g_function));
|
||
puts ("\n");
|
||
for (int i = 0; i < g_function; i++)
|
||
{
|
||
puts ("[");
|
||
puts (itoa (i));
|
||
puts ("]: ");
|
||
puts (g_functions[i].name);
|
||
puts ("\n");
|
||
}
|
||
display_ (r0);
|
||
puts ("\n");
|
||
#endif
|
||
return r2;
|
||
}
|
||
|
||
char string_to_cstring_buf[1024];
|
||
char const*
|
||
string_to_cstring (SCM s)
|
||
{
|
||
//static char buf[1024];
|
||
//char *p = buf;
|
||
char *p = string_to_cstring_buf;
|
||
s = STRING(s);
|
||
while (s != cell_nil)
|
||
{
|
||
*p++ = VALUE (car (s));
|
||
s = cdr (s);
|
||
}
|
||
*p = 0;
|
||
//return buf;
|
||
return string_to_cstring_buf;
|
||
}
|
||
|
||
SCM
|
||
stderr_ (SCM x)
|
||
{
|
||
//SCM write;
|
||
#if __NYACC__ || FIXME_NYACC
|
||
if (TYPE (x) == TSTRING)
|
||
// #else
|
||
// if (TYPE (x) == STRING)
|
||
#endif
|
||
eputs (string_to_cstring (x));
|
||
// else if ((write = assq_ref_env (cell_symbol_write, r0)) != cell_undefined)
|
||
// apply (assq_ref_env (cell_symbol_display, r0), cons (x, cons (MAKE_NUMBER (2), cell_nil)), r0);
|
||
#if __NYACC__ || FIXME_NYACC
|
||
else if (TYPE (x) == TSPECIAL || TYPE (x) == TSTRING || TYPE (x) == TSYMBOL)
|
||
// #else
|
||
// else if (TYPE (x) == SPECIAL || TYPE (x) == STRING || TYPE (x) == SYMBOL)
|
||
#endif
|
||
eputs (string_to_cstring (x));
|
||
else if (TYPE (x) == TNUMBER)
|
||
eputs (itoa (VALUE (x)));
|
||
else
|
||
eputs ("core:stderr: display undefined\n");
|
||
return cell_unspecified;
|
||
}
|
||
|
||
int
|
||
main (int argc, char *argv[])
|
||
{
|
||
eputs ("Hello mini-mes!\n");
|
||
#if __GNUC__
|
||
//g_debug = getenv ("MES_DEBUG");
|
||
#endif
|
||
//if (getenv ("MES_ARENA")) ARENA_SIZE = atoi (getenv ("MES_ARENA"));
|
||
if (argc > 1 && !strcmp (argv[1], "--help")) return eputs ("Usage: mes [--dump|--load] < FILE");
|
||
#if __GNUC__
|
||
if (argc > 1 && !strcmp (argv[1], "--version")) {eputs ("Mes ");return eputs (VERSION);};
|
||
#else
|
||
if (argc > 1 && !strcmp (argv[1], "--version")) {eputs ("Mes ");return eputs ("0.4");};
|
||
#endif
|
||
g_stdin = STDIN;
|
||
|
||
r0 = mes_environment ();
|
||
|
||
#if MES_MINI
|
||
SCM program = bload_env (r0);
|
||
#else
|
||
SCM program = (argc > 1 && !strcmp (argv[1], "--load"))
|
||
? bload_env (r0) : load_env (r0);
|
||
if (argc > 1 && !strcmp (argv[1], "--dump")) return dump ();
|
||
#endif
|
||
|
||
push_cc (r2, cell_unspecified, r0, cell_unspecified);
|
||
eputs ("program: ");
|
||
display_ (r1);
|
||
eputs ("\n");
|
||
r3 = cell_vm_begin;
|
||
r1 = eval_apply ();
|
||
display_ (r1);
|
||
eputs ("\n");
|
||
|
||
#if !MES_MINI
|
||
gc (g_stack);
|
||
#endif
|
||
if (g_debug)
|
||
{
|
||
eputs ("\nstats: [");
|
||
eputs (itoa (g_free));
|
||
eputs ("]\n");
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
#if __GNUC__
|
||
#include "mstart.c"
|
||
#endif
|