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edf2049212
SCM_PORT_WITH_PS_PS): Represent ports with print states as a smob instead of a pair of a port and a print state. We'll need to cons once extra in scm_printer_apply but the type system will be cleaner, it will mix better with GOOPS, and, it will be even more transparent to the user.
124 lines
4.8 KiB
C
124 lines
4.8 KiB
C
/* classes: h_files */
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#ifndef PRINTH
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#define PRINTH
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/* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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#include "libguile/__scm.h"
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#include "libguile/options.h"
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extern scm_option scm_print_opts[];
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#define SCM_PRINT_CLOSURE ((SCM) scm_print_opts[0].val)
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#define SCM_PRINT_SOURCE_P ((int) scm_print_opts[1].val)
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#define SCM_N_PRINT_OPTIONS 2
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/* State information passed around during printing.
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*/
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#define SCM_PRINT_STATE_P(obj) (SCM_STRUCTP(obj) \
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&& (SCM_STRUCT_VTABLE(obj) \
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== scm_print_state_vtable))
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#define SCM_PRINT_STATE(obj) ((scm_print_state *) SCM_STRUCT_DATA (obj))
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#define RESET_PRINT_STATE(pstate) \
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{ \
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pstate->list_offset = 0; \
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pstate->top = 0; \
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}
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#define SCM_WRITINGP(pstate) ((pstate)->writingp)
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#define SCM_SET_WRITINGP(pstate, x) { (pstate)->writingp = (x); }
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#define SCM_PORT_WITH_PS_P(p) (SCM_TYP16 (p) == scm_tc16_port_with_ps)
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#define SCM_PORT_WITH_PS_PORT(p) SCM_CADR (p)
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#define SCM_PORT_WITH_PS_PS(p) SCM_CDDR (p)
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#define SCM_COERCE_OUTPORT(p) (SCM_NIMP (p) && SCM_PORT_WITH_PS_P (p) \
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? SCM_PORT_WITH_PS_PORT (p) \
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: p)
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#define SCM_PRINT_STATE_LAYOUT "sruwuwuwuwuwpwuwuwuruopr"
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typedef struct scm_print_state {
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SCM handle; /* Struct handle */
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int revealed; /* Has the state escaped to Scheme? */
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unsigned long writingp; /* Writing? */
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unsigned long fancyp; /* Fancy printing? */
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unsigned long level; /* Max level */
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unsigned long length; /* Max number of objects per level */
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SCM hot_ref; /* Hot reference */
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unsigned long list_offset;
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unsigned long top; /* Top of reference stack */
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unsigned long ceiling; /* Max size of reference stack */
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SCM *ref_stack; /* Stack of references used during
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circular reference detection */
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SCM ref_vect;
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} scm_print_state;
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extern SCM scm_print_state_vtable;
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extern SCM scm_tc16_port_with_ps;
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extern SCM scm_print_options SCM_P ((SCM setting));
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SCM scm_make_print_state SCM_P ((void));
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void scm_free_print_state SCM_P ((SCM print_state));
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extern void scm_intprint SCM_P ((long n, int radix, SCM port));
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extern void scm_ipruk SCM_P ((char *hdr, SCM ptr, SCM port));
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extern void scm_iprlist SCM_P ((char *hdr, SCM exp, int tlr, SCM port, scm_print_state *pstate));
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extern void scm_prin1 SCM_P ((SCM exp, SCM port, int writingp));
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extern void scm_iprin1 SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
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extern SCM scm_write SCM_P ((SCM obj, SCM port));
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extern SCM scm_display SCM_P ((SCM obj, SCM port));
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extern SCM scm_newline SCM_P ((SCM port));
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extern SCM scm_write_char SCM_P ((SCM chr, SCM port));
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extern SCM scm_printer_apply SCM_P ((SCM proc, SCM exp, SCM port,
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scm_print_state *));
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extern SCM scm_port_with_print_state (SCM port, SCM pstate);
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extern SCM scm_get_print_state (SCM port);
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extern int scm_valid_oport_value_p SCM_P ((SCM val));
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extern void scm_init_print SCM_P ((void));
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#ifdef GUILE_DEBUG
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extern SCM scm_current_pstate SCM_P ((void));
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#endif
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#endif /* PRINTH */
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