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+/* classes: h_files */
+
+#ifndef EVALH
+#define EVALH
+/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ */
+
+
+#include "__scm.h"
+
+
+
+/* {Ilocs}
+ *
+ * Ilocs are relative pointers into local environment structures.
+ *
+ */
+#define SCM_ILOCP(n) (SCM_ITAG8(n)==scm_tc8_iloc)
+#define SCM_ILOC00 SCM_MAKE_ITAG8(0L, scm_tc8_iloc)
+#define SCM_IDINC (0x00100000L)
+#define SCM_ICDR (0x00080000L)
+#define SCM_IFRINC (0x00000100L)
+#define SCM_IDSTMSK (-SCM_IDINC)
+#define SCM_IFRAME(n) ((int)((SCM_ICDR-SCM_IFRINC)>>8) & ((int)(n)>>8))
+#define SCM_IDIST(n) (((unsigned long)(n))>>20)
+#define SCM_ICDRP(n) (SCM_ICDR & (n))
+
+
+
+
+/* Evaluator */
+#ifdef DEBUG_EXTENSIONS
+#define EVAL(x, env) (SCM_IMP(x) \
+ ? (x) \
+ : (*scm_ceval_ptr) ((x), (env)))
+#else
+#define EVAL(x, env) (SCM_IMP(x)?(x):scm_ceval((x), (env)))
+#endif /* DEBUG_EXTENSIONS */
+
+#define SCM_CEVAL scm_ceval
+#define SCM_APPLY scm_apply
+#define SIDEVAL(x, env) if SCM_NIMP(x) SCM_CEVAL((x), (env))
+
+
+
+#define SCM_EXTEND_SCM_ENV scm_acons
+
+
+extern SCM scm_i_dot;
+extern SCM scm_i_quote;
+extern SCM scm_i_quasiquote;
+extern SCM scm_i_lambda;
+extern SCM scm_i_let;
+extern SCM scm_i_arrow;
+extern SCM scm_i_else;
+extern SCM scm_i_unquote;
+extern SCM scm_i_uq_splicing;
+extern SCM scm_i_apply;
+extern SCM scm_top_level_lookup_thunk_var;
+extern SCM scm_i_name;
+
+
+/* A resolved global variable reference in the CAR position
+ * of a list is stored (in code only) as a pointer to a pair with a
+ * tag of 1. This is called a "gloc".
+ */
+
+#define SCM_GLOC_SYM(x) (SCM_CAR((x)-1L))
+#define SCM_GLOC_VAL(x) (SCM_CDR((x)-1L))
+
+
+#ifdef __STDC__
+extern SCM * scm_ilookup (SCM iloc, SCM env);
+extern SCM * scm_lookupcar (SCM vloc, SCM genv);
+extern SCM scm_unmemocar (SCM form, SCM env);
+extern SCM scm_eval_car (SCM pair, SCM env);
+extern SCM scm_m_quote (SCM xorig, SCM env);
+extern SCM scm_m_begin (SCM xorig, SCM env);
+extern SCM scm_m_if (SCM xorig, SCM env);
+extern SCM scm_m_set (SCM xorig, SCM env);
+extern SCM scm_m_vref (SCM xorig, SCM env);
+extern SCM scm_m_vset (SCM xorig, SCM env);
+extern SCM scm_m_and (SCM xorig, SCM env);
+extern SCM scm_m_or (SCM xorig, SCM env);
+extern SCM scm_m_case (SCM xorig, SCM env);
+extern SCM scm_m_cond (SCM xorig, SCM env);
+extern SCM scm_m_lambda (SCM xorig, SCM env);
+extern SCM scm_m_letstar (SCM xorig, SCM env);
+extern SCM scm_m_do (SCM xorig, SCM env);
+extern SCM scm_m_quasiquote (SCM xorig, SCM env);
+extern SCM scm_m_delay (SCM xorig, SCM env);
+extern SCM scm_m_define (SCM x, SCM env);
+extern SCM scm_m_letrec (SCM xorig, SCM env);
+extern SCM scm_m_let (SCM xorig, SCM env);
+extern SCM scm_m_apply (SCM xorig, SCM env);
+extern SCM scm_m_cont (SCM xorig, SCM env);
+extern int scm_badargsp (SCM formals, SCM args);
+extern SCM scm_ceval (SCM x, SCM env);
+extern SCM scm_deval (SCM x, SCM env);
+extern SCM scm_procedure_documentation (SCM proc);
+extern SCM scm_nconc2last (SCM lst);
+extern SCM scm_apply (SCM proc, SCM arg1, SCM args);
+extern SCM scm_dapply (SCM proc, SCM arg1, SCM args);
+extern SCM SCM_APPLY (SCM proc, SCM arg1, SCM args);
+extern SCM scm_map (SCM proc, SCM arg1, SCM args);
+extern SCM scm_for_each (SCM proc, SCM arg1, SCM args);
+extern SCM scm_closure (SCM code, SCM env);
+extern SCM scm_makprom (SCM code);
+extern SCM scm_makacro (SCM code);
+extern SCM scm_makmacro (SCM code);
+extern SCM scm_makmmacro (SCM code);
+extern SCM scm_force (SCM x);
+extern SCM scm_promise_p (SCM x);
+extern SCM scm_copy_tree (SCM obj);
+extern SCM scm_eval_3 (SCM obj, int copyp, SCM env);
+extern SCM scm_top_level_env (SCM thunk);
+extern SCM scm_eval2 (SCM obj, SCM env_thunk);
+extern SCM scm_eval (SCM obj);
+extern SCM scm_eval_x (SCM obj);
+extern SCM scm_macro_eval_x (SCM exp, SCM env);
+extern SCM scm_definedp (SCM x, SCM env);
+extern SCM scm_make_synt (char *name, SCM (*macroizer) (), SCM (*fcn) ());
+extern void scm_init_eval (void);
+
+#else /* STDC */
+extern SCM * scm_ilookup ();
+extern SCM * scm_lookupcar ();
+extern SCM scm_unmemocar ();
+extern SCM scm_eval_car ();
+extern SCM scm_m_quote ();
+extern SCM scm_m_begin ();
+extern SCM scm_m_if ();
+extern SCM scm_m_set ();
+extern SCM scm_m_vref ();
+extern SCM scm_m_vset ();
+extern SCM scm_m_and ();
+extern SCM scm_m_or ();
+extern SCM scm_m_case ();
+extern SCM scm_m_cond ();
+extern SCM scm_m_lambda ();
+extern SCM scm_m_letstar ();
+extern SCM scm_m_do ();
+extern SCM scm_m_quasiquote ();
+extern SCM scm_m_delay ();
+extern SCM scm_m_define ();
+extern SCM scm_m_letrec ();
+extern SCM scm_m_let ();
+extern SCM scm_m_apply ();
+extern SCM scm_m_cont ();
+extern int scm_badargsp ();
+extern SCM scm_ceval ();
+extern SCM scm_deval ();
+extern SCM scm_procedure_documentation ();
+extern SCM scm_nconc2last ();
+extern SCM scm_apply ();
+extern SCM scm_dapply ();
+extern SCM SCM_APPLY ();
+extern SCM scm_map ();
+extern SCM scm_for_each ();
+extern SCM scm_closure ();
+extern SCM scm_makprom ();
+extern SCM scm_makacro ();
+extern SCM scm_makmacro ();
+extern SCM scm_makmmacro ();
+extern SCM scm_force ();
+extern SCM scm_promise_p ();
+extern SCM scm_copy_tree ();
+extern SCM scm_eval_3 ();
+extern SCM scm_top_level_env ();
+extern SCM scm_eval2 ();
+extern SCM scm_eval ();
+extern SCM scm_eval_x ();
+extern SCM scm_macro_eval_x ();
+extern SCM scm_definedp ();
+extern SCM scm_make_synt ();
+extern void scm_init_eval ();
+
+#endif /* STDC */
+
+#endif /* EVALH */