5 /* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this software; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307 USA
22 * As a special exception, the Free Software Foundation gives permission
23 * for additional uses of the text contained in its release of GUILE.
25 * The exception is that, if you link the GUILE library with other files
26 * to produce an executable, this does not by itself cause the
27 * resulting executable to be covered by the GNU General Public License.
28 * Your use of that executable is in no way restricted on account of
29 * linking the GUILE library code into it.
31 * This exception does not however invalidate any other reasons why
32 * the executable file might be covered by the GNU General Public License.
34 * This exception applies only to the code released by the
35 * Free Software Foundation under the name GUILE. If you copy
36 * code from other Free Software Foundation releases into a copy of
37 * GUILE, as the General Public License permits, the exception does
38 * not apply to the code that you add in this way. To avoid misleading
39 * anyone as to the status of such modified files, you must delete
40 * this exception notice from them.
42 * If you write modifications of your own for GUILE, it is your choice
43 * whether to permit this exception to apply to your modifications.
44 * If you do not wish that, delete this exception notice. */
47 #include "libguile/__scm.h"
49 #include "libguile/options.h"
51 extern scm_option scm_print_opts
[];
53 #define SCM_PRINT_CLOSURE ((SCM) scm_print_opts[0].val)
54 #define SCM_PRINT_SOURCE_P ((int) scm_print_opts[1].val)
55 #define SCM_N_PRINT_OPTIONS 2
57 /* State information passed around during printing.
59 #define SCM_PRINT_STATE_P(obj) (SCM_STRUCTP(obj) \
60 && (SCM_STRUCT_VTABLE(obj) \
61 == scm_print_state_vtable))
62 #define SCM_PRINT_STATE(obj) ((scm_print_state *) SCM_STRUCT_DATA (obj))
64 #define RESET_PRINT_STATE(pstate) \
66 pstate->list_offset = 0; \
70 #define SCM_WRITINGP(pstate) ((pstate)->writingp)
71 #define SCM_SET_WRITINGP(pstate, x) { (pstate)->writingp = (x); }
73 #define SCM_COERCE_OUTPORT(p) ((SCM_NIMP (p) \
75 && SCM_PRINT_STATE_P (SCM_CDR (p))) \
79 #define SCM_PRINT_STATE_LAYOUT "sruwuwuwuwuwpwuwuwuruopr"
80 typedef struct scm_print_state
{
81 SCM handle
; /* Struct handle */
82 int revealed
; /* Has the state escaped to Scheme? */
83 unsigned long writingp
; /* Writing? */
84 unsigned long fancyp
; /* Fancy printing? */
85 unsigned long level
; /* Max level */
86 unsigned long length
; /* Max number of objects per level */
87 SCM hot_ref
; /* Hot reference */
88 unsigned long list_offset
;
89 unsigned long top
; /* Top of reference stack */
90 unsigned long ceiling
; /* Max size of reference stack */
91 SCM
*ref_stack
; /* Stack of references used during
92 circular reference detection */
96 extern SCM scm_print_state_vtable
;
98 extern SCM scm_print_options
SCM_P ((SCM setting
));
99 SCM scm_make_print_state
SCM_P ((void));
100 void scm_free_print_state
SCM_P ((SCM print_state
));
101 extern void scm_intprint
SCM_P ((long n
, int radix
, SCM port
));
102 extern void scm_ipruk
SCM_P ((char *hdr
, SCM ptr
, SCM port
));
103 extern void scm_iprlist
SCM_P ((char *hdr
, SCM exp
, int tlr
, SCM port
, scm_print_state
*pstate
));
104 extern void scm_prin1
SCM_P ((SCM exp
, SCM port
, int writingp
));
105 extern void scm_iprin1
SCM_P ((SCM exp
, SCM port
, scm_print_state
*pstate
));
106 extern SCM scm_write
SCM_P ((SCM obj
, SCM port
));
107 extern SCM scm_display
SCM_P ((SCM obj
, SCM port
));
108 extern SCM scm_newline
SCM_P ((SCM port
));
109 extern SCM scm_write_char
SCM_P ((SCM chr
, SCM port
));
110 extern SCM scm_printer_apply
SCM_P ((SCM proc
, SCM exp
, SCM port
,
112 extern int scm_valid_oport_value_p
SCM_P ((SCM val
));
113 extern void scm_init_print
SCM_P ((void));
116 extern SCM scm_current_pstate
SCM_P ((void));