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/* classes: h_files */
#ifndef SCM_SMOB_H
#define SCM_SMOB_H
/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2004, 2006 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libguile/__scm.h"
#include "libguile/print.h"
/* This is the internal representation of a smob type */
typedef struct scm_smob_descriptor
{
char const *name;
size_t size;
SCM (*mark) (SCM);
size_t (*free) (SCM);
int (*print) (SCM exp, SCM port, scm_print_state *pstate);
SCM (*equalp) (SCM, SCM);
SCM (*apply) ();
SCM (*apply_0) (SCM);
SCM (*apply_1) (SCM, SCM);
SCM (*apply_2) (SCM, SCM, SCM);
SCM (*apply_3) (SCM, SCM, SCM, SCM);
int gsubr_type; /* Used in procprop.c */
} scm_smob_descriptor;
#define SCM_NEWSMOB(z, tc, data) \
do { \
z = scm_cell ((tc), (scm_t_bits) (data)); \
} while (0)
#define SCM_RETURN_NEWSMOB(tc, data) \
do { SCM __SCM_smob_answer; \
SCM_NEWSMOB (__SCM_smob_answer, (tc), (data)); \
return __SCM_smob_answer; \
} while (0)
#define SCM_NEWSMOB2(z, tc, data1, data2) \
do { \
z = scm_double_cell ((tc), (scm_t_bits)(data1), (scm_t_bits)(data2), 0); \
} while (0)
#define SCM_RETURN_NEWSMOB2(tc, data1, data2) \
do { SCM __SCM_smob_answer; \
SCM_NEWSMOB2 (__SCM_smob_answer, (tc), (data1), (data2)); \
return __SCM_smob_answer; \
} while (0)
#define SCM_NEWSMOB3(z, tc, data1, data2, data3) \
do { \
z = scm_double_cell ((tc), (scm_t_bits)(data1), \
(scm_t_bits)(data2), (scm_t_bits)(data3)); \
} while (0)
#define SCM_RETURN_NEWSMOB3(tc, data1, data2, data3) \
do { SCM __SCM_smob_answer; \
SCM_NEWSMOB3 (__SCM_smob_answer, (tc), (data1), (data2), (data3)); \
return __SCM_smob_answer; \
} while (0)
#define SCM_SMOB_FLAGS(x) (SCM_CELL_WORD_0 (x) >> 16)
#define SCM_SMOB_DATA(x) (SCM_CELL_WORD_1 (x))
#define SCM_SMOB_DATA_2(x) (SCM_CELL_WORD_2 (x))
#define SCM_SMOB_DATA_3(x) (SCM_CELL_WORD_3 (x))
#define SCM_SET_SMOB_DATA(x, data) (SCM_SET_CELL_WORD_1 ((x), (data)))
#define SCM_SET_SMOB_DATA_2(x, data) (SCM_SET_CELL_WORD_2 ((x), (data)))
#define SCM_SET_SMOB_DATA_3(x, data) (SCM_SET_CELL_WORD_3 ((x), (data)))
#define SCM_SET_SMOB_FLAGS(x, data) (scm_i_set_smob_flags((x),(data)<<16))
#define SCM_SMOB_OBJECT(x) (SCM_CELL_OBJECT_1 (x))
#define SCM_SMOB_OBJECT_2(x) (SCM_CELL_OBJECT_2 (x))
#define SCM_SMOB_OBJECT_3(x) (SCM_CELL_OBJECT_3 (x))
#define SCM_SET_SMOB_OBJECT(x,obj) (SCM_SET_CELL_OBJECT_1 ((x), (obj)))
#define SCM_SET_SMOB_OBJECT_2(x,obj) (SCM_SET_CELL_OBJECT_2 ((x), (obj)))
#define SCM_SET_SMOB_OBJECT_3(x,obj) (SCM_SET_CELL_OBJECT_3 ((x), (obj)))
#define SCM_SMOB_OBJECT_LOC(x) (SCM_CELL_OBJECT_LOC ((x), 1))
#define SCM_SMOB_OBJECT_2_LOC(x) (SCM_CELL_OBJECT_LOC ((x), 2))
#define SCM_SMOB_OBJECT_3_LOC(x) (SCM_CELL_OBJECT_LOC ((x), 3))
#define SCM_TC2SMOBNUM(x) (0x0ff & ((x) >> 8))
#define SCM_SMOBNUM(x) (SCM_TC2SMOBNUM (SCM_CELL_TYPE (x)))
/* SCM_SMOBNAME can be 0 if name is missing */
#define SCM_SMOBNAME(smobnum) (scm_smobs[smobnum].name)
#define SCM_SMOB_PREDICATE(tag, obj) SCM_TYP16_PREDICATE (tag, obj)
#define SCM_SMOB_DESCRIPTOR(x) (scm_smobs[SCM_SMOBNUM (x)])
#define SCM_SMOB_APPLICABLE_P(x) (SCM_SMOB_DESCRIPTOR (x).apply)
#define SCM_SMOB_APPLY_0(x) (SCM_SMOB_DESCRIPTOR (x).apply_0 (x))
#define SCM_SMOB_APPLY_1(x, a1) (SCM_SMOB_DESCRIPTOR (x).apply_1 (x, (a1)))
#define SCM_SMOB_APPLY_2(x, a1, a2) (SCM_SMOB_DESCRIPTOR (x).apply_2 (x, (a1), (a2)))
#define SCM_SMOB_APPLY_3(x, a1, a2, rst) (SCM_SMOB_DESCRIPTOR (x).apply_3 (x, (a1), (a2), (rst)))
SCM_API long scm_numsmob;
SCM_API scm_smob_descriptor scm_smobs[];
SCM_API void scm_i_set_smob_flags (SCM x, scm_t_bits data);
SCM_API SCM scm_mark0 (SCM ptr);
SCM_API SCM scm_markcdr (SCM ptr);
SCM_API size_t scm_free0 (SCM ptr);
SCM_API size_t scm_smob_free (SCM obj);
SCM_API int scm_smob_print (SCM exp, SCM port, scm_print_state *pstate);
/* The following set of functions is the standard way to create new
* SMOB types.
*
* Create a type tag using `scm_make_smob_type', accept default values
* for mark, free, print and/or equalp functions, or set your own
* values using `scm_set_smob_xxx'.
*/
SCM_API scm_t_bits scm_make_smob_type (char const *name, size_t size);
SCM_API void scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM));
SCM_API void scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM));
SCM_API void scm_set_smob_print (scm_t_bits tc,
int (*print) (SCM, SCM, scm_print_state*));
SCM_API void scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM));
SCM_API void scm_set_smob_apply (scm_t_bits tc,
SCM (*apply) (),
unsigned int req,
unsigned int opt,
unsigned int rst);
SCM_API void scm_assert_smob_type (scm_t_bits tag, SCM val);
/* Function for creating smobs */
SCM_API SCM scm_make_smob (scm_t_bits tc);
SCM_API void scm_smob_prehistory (void);
#endif /* SCM_SMOB_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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