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/* Copyright 1989 GROUPE BULL -- See license conditions in file COPYRIGHT
* Copyright 1989 Massachusetts Institute of Technology
*/
/********************************************\
* *
* WOOL_OBJECT Subr, FSubr, Expr and FExpr *
* DEFINITIONS *
* *
\********************************************/
#ifndef INCLUDE_WL_FUNC_H
#define INCLUDE_WL_FUNC_H
/* type */
typedef struct _WOOL_Subr {
WOOL_HEADER;
int arity;
WOOL_OBJECT(*body) ();
} *WOOL_Subr;
typedef struct _WOOL_FSubr {
WOOL_HEADER;
int arity;
WOOL_OBJECT(*body) ();
} *WOOL_FSubr;
typedef struct _WOOL_Expr {
WOOL_HEADER;
int arity;
WOOL_Atom *parameters;
int body_size;
WOOL_OBJECT *body;
} *WOOL_Expr;
typedef struct _WOOL_FExpr {
WOOL_HEADER;
int arity;
WOOL_Atom *parameters;
int body_size;
WOOL_OBJECT *body;
} *WOOL_FExpr;
/* exported functions */
EXT WOOL_Subr WLSubr_make();
EXT WOOL_OBJECT wool_lambda_make();
EXT WOOL_OBJECT wool_lambdaq_make();
EXT WOOL_OBJECT defun();
EXT WOOL_OBJECT wool_subr_make();
EXT WOOL_OBJECT WLSubr_print();
EXT WOOL_OBJECT WLFSubr_print();
EXT WOOL_OBJECT WLExpr_print();
EXT WOOL_OBJECT WLFExpr_print();
EXT WOOL_OBJECT WLExpr_free();
EXT WOOL_OBJECT WLSubr_execute();
EXT WOOL_OBJECT WLFSubr_execute();
EXT WOOL_OBJECT WLExpr_execute();
EXT WOOL_OBJECT WLFExpr_execute();
EXT WOOL_OBJECT execute_local_code();
EXT WOOL_OBJECT local_variables();
EXT WOOL_OBJECT *map_eval();
/* methods */
EXT WOOL_METHOD WLSubr[]
#ifdef DO_INIT
= {
(WOOL_METHOD) 0, /* METHODS_ARRAY */
WLNumber_eval, /* WOOL_eval 1 */
WLSubr_print, /* WOOL_print 2 */
WLNumber_free, /* WOOL_free 3 */
WLSubr_execute, /* WOOL_execute 4 */
wool_undefined_method_2, /* WOOL_set 5 */
(WOOL_METHOD) wool_undefined_method_1,/* WOOL_get_C_value 6 */
wool_undefined_method_1, /* WOOL_open 7 */
wool_undefined_method_1, /* WOOL_close 8 */
wool_undefined_method_2, /* WOOL_process_event 9 */
wool_undefined_method_1, /* WOOL_copy 10 */
wool_undefined_method_2, /* WOOL_get_dimensions 11 */
wool_undefined_method_2, /* WOOL_draw 12 */
wool_undefined_method_2, /* WOOL_equal 13 */
wool_undefined_method_2,
wool_undefined_method_2,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1
}
#endif /* DO_INIT */
;
EXT WOOL_METHOD WLFSubr[]
#ifdef DO_INIT
= {
(WOOL_METHOD) 0, /* METHODS_ARRAY */
WLNumber_eval, /* WOOL_eval 1 */
WLFSubr_print, /* WOOL_print 2 */
WLNumber_free, /* WOOL_free 3 */
WLFSubr_execute, /* WOOL_execute 4 */
wool_undefined_method_2, /* WOOL_set 5 */
(WOOL_METHOD) wool_undefined_method_1,/* WOOL_get_C_value 6 */
wool_undefined_method_1, /* WOOL_open 7 */
wool_undefined_method_1, /* WOOL_close 8 */
wool_undefined_method_2, /* WOOL_process_event 9 */
wool_undefined_method_1, /* WOOL_copy 10 */
wool_undefined_method_2, /* WOOL_get_dimensions 11 */
wool_undefined_method_2, /* WOOL_draw 12 */
wool_undefined_method_2, /* WOOL_equal 13 */
wool_undefined_method_2,
wool_undefined_method_2,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1
}
#endif /* DO_INIT */
;
EXT WOOL_METHOD WLExpr[]
#ifdef DO_INIT
= {
(WOOL_METHOD) 0, /* METHODS_ARRAY */
WLNumber_eval, /* WOOL_eval 1 */
WLExpr_print, /* WOOL_print 2 */
WLExpr_free, /* WOOL_free 3 */
WLExpr_execute, /* WOOL_execute 4 */
wool_undefined_method_2, /* WOOL_set 5 */
(WOOL_METHOD) wool_undefined_method_1,/* WOOL_get_C_value 6 */
wool_undefined_method_1, /* WOOL_open 7 */
wool_undefined_method_1, /* WOOL_close 8 */
wool_undefined_method_2, /* WOOL_process_event 9 */
wool_undefined_method_1, /* WOOL_copy 10 */
wool_undefined_method_2, /* WOOL_get_dimensions 11 */
wool_undefined_method_2, /* WOOL_draw 12 */
wool_undefined_method_2, /* WOOL_equal 13 */
wool_undefined_method_2,
wool_undefined_method_2,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1
}
#endif /* DO_INIT */
;
EXT WOOL_METHOD WLFExpr[]
#ifdef DO_INIT
= {
(WOOL_METHOD) 0, /* METHODS_ARRAY */
WLNumber_eval, /* WOOL_eval 1 */
WLFExpr_print, /* WOOL_print 2 */
WLExpr_free, /* WOOL_free 3 */
WLFExpr_execute, /* WOOL_execute 4 */
wool_undefined_method_2, /* WOOL_set 5 */
(WOOL_METHOD) wool_undefined_method_1,/* WOOL_get_C_value 6 */
wool_undefined_method_1, /* WOOL_open 7 */
wool_undefined_method_1, /* WOOL_close 8 */
wool_undefined_method_2, /* WOOL_process_event 9 */
wool_undefined_method_1, /* WOOL_copy 10 */
wool_undefined_method_2, /* WOOL_get_dimensions 11 */
wool_undefined_method_2, /* WOOL_draw 12 */
wool_undefined_method_2, /* WOOL_equal 13 */
wool_undefined_method_2,
wool_undefined_method_2,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1,
wool_undefined_method_1
}
#endif /* DO_INIT */
;
/* A stack frame is:
* - the (printable) expression which triggered the NEXT call
* - a pointer to the previous stack frame
* - size, the number of stored variables
* - parameters, the list of formal (atoms, actives, pointers) parms
* - new_values, the list of evaluated new values
* - old_values, the list of previous values which will get restored
* (internal space to the struct)
*/
typedef struct _WOOL_StackFrame {
struct _WOOL_StackFrame *previous; /* previous stack frame */
int size; /* the number of stacked vars */
WOOL_Atom *parameters; /* pointer to parameters */
WOOL_OBJECT *new_values; /* pointer to new values */
WOOL_OBJECT old_values[1]; /* the old values to be restored */
} *WOOL_StackFrame;
/* first frame and pointer to the last/current one */
EXT struct _WOOL_StackFrame wool_first_stackframe;
EXT WOOL_StackFrame wool_current_stackframe INIT(&wool_first_stackframe);
EXT WOOL_StackFrame wool_stackframe_on_error INIT(&wool_first_stackframe);
/* call stack */
EXT WOOL_OBJECT *calling_function_stack;
EXT WOOL_OBJECT *calling_function_current;
EXT WOOL_OBJECT *calling_function_end;
EXT int calling_function_on_error INIT(0);
EXT int wool_max_stack_print_level INIT(100);
#define calling_function_push(obj) \
if (calling_function_current >= calling_function_end) { \
int size = calling_function_end - calling_function_stack; \
int ptr = calling_function_current - calling_function_stack; \
calling_function_stack = (WOOL_OBJECT *) \
Realloc(calling_function_stack, \
size * 2 * sizeof(WOOL_OBJECT) - 4); \
calling_function_end = calling_function_stack +2*size -1; \
calling_function_current = calling_function_stack + ptr; \
} \
*calling_function_current++ = (WOOL_OBJECT) (obj); \
CheckLoopsPush()
#ifdef DEBUG
#define calling_function_pop() \
if (calling_function_current == calling_function_stack) \
wool_error("stack underflow%s", ""); \
calling_function_current--; \
CheckLoopsPop()
#else /* DEBUG */
#define calling_function_pop() \
calling_function_current--; CheckLoopsPop()
#endif /* DEBUG */
/* debug */
#ifdef DEBUG
EXT int CheckLoopsN INIT(0);
#define CheckLoopsPop() CheckLoopsN--
#ifdef COMMENT
#define CheckLoopsPush() if (CheckLoopsN++ > 32000) \
wool_error("stack overflow%s", "")
#else /* !COMMENT */
/* the above code is commented as it seems to trigger errors without reason */
#define CheckLoopsPush() CheckLoopsN++
#endif /* !COMMENT */
#else /* !DEBUG */
#define CheckLoopsPop()
#define CheckLoopsPush()
#endif/* !DEBUG */
#endif /* INCLUDE_WL_FUNC_H */
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