libguile/print.h

   1 /* classes: h_files */
   2
   3 #ifndef PRINTH
   4 #define PRINTH
   5 /*      Copyright (C) 1995,1996 Free Software Foundation, Inc.
   6  *
   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)
  10  * any later version.
  11  *
  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.
  16  *
  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, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * As a special exception, the Free Software Foundation gives permission
  22  * for additional uses of the text contained in its release of GUILE.
  23  *
  24  * The exception is that, if you link the GUILE library with other files
  25  * to produce an executable, this does not by itself cause the
  26  * resulting executable to be covered by the GNU General Public License.
  27  * Your use of that executable is in no way restricted on account of
  28  * linking the GUILE library code into it.
  29  *
  30  * This exception does not however invalidate any other reasons why
  31  * the executable file might be covered by the GNU General Public License.
  32  *
  33  * This exception applies only to the code released by the
  34  * Free Software Foundation under the name GUILE.  If you copy
  35  * code from other Free Software Foundation releases into a copy of
  36  * GUILE, as the General Public License permits, the exception does
  37  * not apply to the code that you add in this way.  To avoid misleading
  38  * anyone as to the status of such modified files, you must delete
  39  * this exception notice from them.
  40  *
  41  * If you write modifications of your own for GUILE, it is your choice
  42  * whether to permit this exception to apply to your modifications.
  43  * If you do not wish that, delete this exception notice.
  44  */
  45 \f
  46
  47 #include "libguile/__scm.h"
  48
  49 #include "libguile/options.h"
  50 \f
  51 extern scm_option scm_print_opts[];
  52
  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
  56
  57 /* State information passed around during printing.
  58  */
  59 #define SCM_PRINT_STATE(obj) ((scm_print_state *) SCM_STRUCT_DATA (obj))
  60
  61 #define RESET_PRINT_STATE(pstate) \
  62 { \
  63   pstate->list_offset = 0; \
  64   pstate->top = 0; \
  65 }
  66
  67 #define SCM_WRITINGP(pstate) ((pstate)->writingp)
  68 #define SCM_SET_WRITINGP(pstate, x) { (pstate)->writingp = (x); }
  69
  70 #define SCM_PRINT_STATE_LAYOUT "sruwuwuwuwpwuwuwuwpW"
  71 typedef struct scm_print_state {
  72   SCM handle;                   /* Struct handle */
  73   unsigned long writingp;       /* Writing? */
  74   unsigned long fancyp;         /* Fancy printing? */
  75   unsigned long level;          /* Max level */
  76   unsigned long length;         /* Max number of objects per level */
  77   SCM hot_ref;                  /* Hot reference */
  78   unsigned long list_offset;
  79   unsigned long top;            /* Top of reference stack */
  80   unsigned long ceiling;        /* Max size of reference stack */
  81   unsigned long n_refs;         /* Size of struct tail array */
  82   SCM ref_stack[1];             /* Stack of references used during
  83                                    circular reference detection */
  84 } scm_print_state;
  85
  86 extern SCM scm_print_options SCM_P ((SCM setting));
  87 SCM scm_make_print_state SCM_P ((void));
  88 void scm_free_print_state SCM_P ((SCM print_state));
  89 extern void scm_intprint SCM_P ((long n, int radix, SCM port));
  90 extern void scm_ipruk SCM_P ((char *hdr, SCM ptr, SCM port));
  91 extern void scm_iprlist SCM_P ((char *hdr, SCM exp, char tlr, SCM port, scm_print_state *pstate));
  92 extern void scm_prin1 SCM_P ((SCM exp, SCM port, int writingp));
  93 extern void scm_iprin1 SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
  94 extern SCM scm_write SCM_P ((SCM obj, SCM port));
  95 extern SCM scm_display SCM_P ((SCM obj, SCM port));
  96 extern SCM scm_newline SCM_P ((SCM port));
  97 extern SCM scm_write_char SCM_P ((SCM chr, SCM port));
  98 extern void scm_init_print SCM_P ((void));
  99
 100 #endif  /* PRINTH */