/* classes: h_files */ #ifndef ENVIRONMENTS_H #define ENVIRONMENTS_H /* Copyright (C) 1999, 2000 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, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307 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 "libguile/__scm.h" /* The type for folding functions written in C. A function meant to be passed * to scm_c_environment_fold should have the type scm_environment_folder. */ typedef SCM (*scm_environment_folder) (SCM data, SCM sym, SCM val, SCM tail); /* The type for observer functions written in C. A function meant to be * passed to scm_c_environment_observe should have the type * scm_environment_observer. */ typedef void (*scm_environment_observer) (SCM env, SCM data); struct scm_environment_funcs { SCM (*ref) (SCM self, SCM symbol); SCM (*fold) (SCM self, scm_environment_folder proc, SCM data, SCM init); SCM (*define) (SCM self, SCM symbol, SCM value); SCM (*undefine) (SCM self, SCM symbol); SCM (*set) (SCM self, SCM symbol, SCM value); SCM (*cell) (SCM self, SCM symbol, int for_write); SCM (*observe) (SCM self, scm_environment_observer proc, SCM data, int weak_p); void (*unobserve) (SCM self, SCM token); SCM (*mark) (SCM self); size_t (*free) (SCM self); int (*print) (SCM self, SCM port, scm_print_state *pstate); }; #define SCM_ENVIRONMENT_SUCCESS SCM_BOOL_T #define SCM_ENVIRONMENT_BINDING_IMMUTABLE SCM_MAKINUM (0) #define SCM_ENVIRONMENT_LOCATION_IMMUTABLE SCM_MAKINUM (1) #define SCM_ENVIRONMENT_LOCATION_NO_CELL SCM_BOOL_F extern scm_t_bits scm_tc16_environment; #define SCM_ENVIRONMENT_P(x) \ (!SCM_IMP (x) && SCM_CELL_TYPE (x) == scm_tc16_environment) #define SCM_ENVIRONMENT_FUNCS(env) \ (*((struct scm_environment_funcs **) SCM_CELL_WORD_1 (env))) #define SCM_ENVIRONMENT_BOUND_P(env, symbol) \ (!SCM_UNBNDP (SCM_ENVIRONMENT_REF (env, symbol))) #define SCM_ENVIRONMENT_REF(env, symbol) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->ref)) (env, symbol)) #define SCM_ENVIRONMENT_FOLD(env, proc, data, init) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->fold)) (env, proc, data, init)) #define SCM_ENVIRONMENT_DEFINE(env, symbol, value) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->define)) (env, symbol, value)) #define SCM_ENVIRONMENT_UNDEFINE(env, symbol) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->undefine)) (env, symbol)) #define SCM_ENVIRONMENT_SET(env, symbol, value) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->set)) (env, symbol, value)) #define SCM_ENVIRONMENT_CELL(env, symbol, for_write) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->cell)) (env, symbol, for_write)) #define SCM_ENVIRONMENT_OBSERVE(env, proc, data, weak_p) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->observe)) (env, proc, data, weak_p)) #define SCM_ENVIRONMENT_UNOBSERVE(env, token) \ ((*(SCM_ENVIRONMENT_FUNCS (env)->unobserve)) (env, token)) extern scm_t_bits scm_tc16_observer; #define SCM_OBSERVER_P(x) \ (!SCM_IMP (x) && (SCM_CELL_TYPE (x) == scm_tc16_observer)) #define SCM_OBSERVER_ENVIRONMENT(x) \ (SCM_CELL_OBJECT_1 (x)) #define SCM_OBSERVER_DATA(x) \ (SCM_CELL_OBJECT_2 (x)) #define SCM_OBSERVER_PROC(x) \ ((scm_environment_observer) SCM_CELL_WORD_3 (x)) extern SCM scm_system_environment; extern void scm_error_environment_unbound (const char *, SCM, SCM) SCM_NORETURN; extern void scm_error_environment_immutable_binding (const char *, SCM, SCM) SCM_NORETURN; extern void scm_error_environment_immutable_location (const char *, SCM, SCM) SCM_NORETURN; extern SCM scm_make_environment (void *type); extern SCM scm_environment_p (SCM env); extern SCM scm_environment_bound_p (SCM env, SCM sym); extern SCM scm_environment_ref (SCM env, SCM sym); extern SCM scm_c_environment_ref (SCM env, SCM sym); extern SCM scm_environment_fold (SCM env, SCM proc, SCM init); extern SCM scm_c_environment_fold (SCM env, scm_environment_folder proc, SCM data, SCM init); extern SCM scm_environment_define (SCM env, SCM sym, SCM val); extern SCM scm_environment_undefine (SCM env, SCM sym); extern SCM scm_environment_set_x (SCM env, SCM sym, SCM val); extern SCM scm_environment_cell (SCM env, SCM sym, SCM for_write); extern SCM scm_c_environment_cell (SCM env, SCM sym, int for_write); extern SCM scm_environment_observe (SCM env, SCM proc); extern SCM scm_environment_observe_weak (SCM env, SCM proc); extern SCM scm_c_environment_observe (SCM env, scm_environment_observer proc, SCM data, int weak_p); extern SCM scm_environment_unobserve (SCM token); extern void scm_environments_prehistory (void); extern void scm_init_environments (void); extern void *scm_type_leaf_environment; #define SCM_LEAF_ENVIRONMENT_P(env) \ (SCM_ENVIRONMENT_P (env) \ && SCM_ENVIRONMENT_FUNCS (env) == scm_type_leaf_environment) extern SCM scm_make_leaf_environment (void); extern SCM scm_leaf_environment_p (SCM env); extern void *scm_type_eval_environment; #define SCM_EVAL_ENVIRONMENT_P(env) \ (SCM_ENVIRONMENT_P (env) \ && SCM_ENVIRONMENT_FUNCS (env) == scm_type_eval_environment) extern SCM scm_make_eval_environment (SCM local, SCM imported); extern SCM scm_eval_environment_p (SCM env); extern SCM scm_eval_environment_local (SCM env); extern SCM scm_eval_environment_set_local_x (SCM env, SCM local); extern SCM scm_eval_environment_imported (SCM env); extern SCM scm_eval_environment_set_imported_x (SCM env, SCM imported); extern void *scm_type_import_environment; #define SCM_IMPORT_ENVIRONMENT_P(env) \ (SCM_ENVIRONMENT_P (env) \ && SCM_ENVIRONMENT_FUNCS (env) == scm_type_import_environment) extern SCM scm_make_import_environment (SCM imports, SCM conflict_proc); extern SCM scm_import_environment_p (SCM env); extern SCM scm_import_environment_imports (SCM env); extern SCM scm_import_environment_set_imports_x (SCM env, SCM imports); extern void *scm_type_export_environment; #define SCM_EXPORT_ENVIRONMENT_P(env) \ (SCM_ENVIRONMENT_P (env) \ && SCM_ENVIRONMENT_FUNCS (env) == scm_type_export_environment) extern SCM scm_make_export_environment (SCM private, SCM signature); extern SCM scm_export_environment_p (SCM env); extern SCM scm_export_environment_private (SCM env); extern SCM scm_export_environment_set_private_x (SCM env, SCM private); extern SCM scm_export_environment_signature (SCM env); extern SCM scm_export_environment_set_signature_x (SCM env, SCM signature); #endif /* Local Variables: c-file-style: "gnu" End: */