libguile/print.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_PRINT_H
   4 #define SCM_PRINT_H
   5
   6 /* Copyright (C) 1995,1996,1998,2000,2001, 2003 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22
  23 \f
  24
  25 #include "libguile/__scm.h"
  26
  27 #include "libguile/options.h"
  28 \f
  29 SCM_API scm_t_option scm_print_opts[];
  30
  31 #define SCM_PRINT_CLOSURE       (SCM_PACK (scm_print_opts[0].val))
  32 #define SCM_PRINT_SOURCE_P      ((int) scm_print_opts[1].val)
  33 #define SCM_N_PRINT_OPTIONS 2
  34
  35 /* State information passed around during printing.
  36  */
  37 #define SCM_PRINT_STATE_P(obj) (SCM_STRUCTP(obj) \
  38                                 && (SCM_EQ_P (SCM_STRUCT_VTABLE(obj), \
  39                                               scm_print_state_vtable)))
  40 #define SCM_PRINT_STATE(obj) ((scm_print_state *) SCM_STRUCT_DATA (obj))
  41
  42 #define RESET_PRINT_STATE(pstate) \
  43 do { \
  44   pstate->list_offset = 0; \
  45   pstate->top = 0; \
  46 } while (0)
  47
  48 #define SCM_WRITINGP(pstate) ((pstate)->writingp)
  49 #define SCM_SET_WRITINGP(pstate, x) { (pstate)->writingp = (x); }
  50
  51 #define SCM_PORT_WITH_PS_P(p)    SCM_TYP16_PREDICATE (scm_tc16_port_with_ps, p)
  52 #define SCM_PORT_WITH_PS_PORT(p) SCM_CAR (SCM_CELL_OBJECT_1 (p))
  53 #define SCM_PORT_WITH_PS_PS(p)   SCM_CDR (SCM_CELL_OBJECT_1 (p))
  54
  55 #define SCM_COERCE_OUTPORT(p) \
  56   (SCM_PORT_WITH_PS_P (p) ? SCM_PORT_WITH_PS_PORT (p) : p)
  57
  58 #define SCM_PRINT_STATE_LAYOUT "sruwuwuwuwuwpwuwuwuruopr"
  59 typedef struct scm_print_state {
  60   SCM handle;                   /* Struct handle */
  61   int revealed;                 /* Has the state escaped to Scheme? */
  62   unsigned long writingp;       /* Writing? */
  63   unsigned long fancyp;         /* Fancy printing? */
  64   unsigned long level;          /* Max level */
  65   unsigned long length;         /* Max number of objects per level */
  66   SCM hot_ref;                  /* Hot reference */
  67   unsigned long list_offset;
  68   unsigned long top;            /* Top of reference stack */
  69   unsigned long ceiling;        /* Max size of reference stack */
  70   SCM *ref_stack;               /* Stack of references used during
  71                                    circular reference detection */
  72   SCM ref_vect;
  73 } scm_print_state;
  74
  75 SCM_API SCM scm_print_state_vtable;
  76
  77 SCM_API scm_t_bits scm_tc16_port_with_ps;
  78
  79 SCM_API SCM scm_print_options (SCM setting);
  80 SCM_API SCM scm_make_print_state (void);
  81 SCM_API void scm_free_print_state (SCM print_state);
  82 SCM scm_i_port_with_print_state (SCM port, SCM print_state);
  83 SCM_API void scm_intprint (long n, int radix, SCM port);
  84 SCM_API void scm_ipruk (char *hdr, SCM ptr, SCM port);
  85 SCM_API void scm_iprlist (char *hdr, SCM exp, int tlr, SCM port, scm_print_state *pstate);
  86 SCM_API void scm_print_symbol_name (const char *str, size_t len, SCM port);
  87 SCM_API void scm_prin1 (SCM exp, SCM port, int writingp);
  88 SCM_API void scm_iprin1 (SCM exp, SCM port, scm_print_state *pstate);
  89 SCM_API SCM scm_write (SCM obj, SCM port);
  90 SCM_API SCM scm_display (SCM obj, SCM port);
  91 SCM_API SCM scm_simple_format (SCM port, SCM message, SCM args);
  92 SCM_API SCM scm_newline (SCM port);
  93 SCM_API SCM scm_write_char (SCM chr, SCM port);
  94 SCM_API SCM scm_printer_apply (SCM proc, SCM exp, SCM port, scm_print_state *);
  95 SCM_API SCM scm_port_with_print_state (SCM port, SCM pstate);
  96 SCM_API SCM scm_get_print_state (SCM port);
  97 SCM_API int scm_valid_oport_value_p (SCM val);
  98 SCM_API void scm_init_print (void);
  99
 100 #ifdef GUILE_DEBUG
 101 SCM_API SCM scm_current_pstate (void);
 102 #endif
 103
 104 #endif  /* SCM_PRINT_H */
 105
 106 /*
 107   Local Variables:
 108   c-file-style: "gnu"
 109   End:
 110 */