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, 2004 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_PRINT_HIGHLIGHT_PREFIX  (SCM_PACK (scm_print_opts[2].val))
  34 #define SCM_PRINT_HIGHLIGHT_SUFFIX  (SCM_PACK (scm_print_opts[3].val))
  35 #define SCM_N_PRINT_OPTIONS 4
  36
  37 /* State information passed around during printing.
  38  */
  39 #define SCM_PRINT_STATE_P(obj) (SCM_STRUCTP(obj) \
  40                                 && (scm_is_eq (SCM_STRUCT_VTABLE(obj), \
  41                                                scm_print_state_vtable)))
  42 #define SCM_PRINT_STATE(obj) ((scm_print_state *) SCM_STRUCT_DATA (obj))
  43
  44 #define RESET_PRINT_STATE(pstate) \
  45 do { \
  46   pstate->list_offset = 0; \
  47   pstate->top = 0; \
  48 } while (0)
  49
  50 #define SCM_WRITINGP(pstate) ((pstate)->writingp)
  51 #define SCM_SET_WRITINGP(pstate, x) { (pstate)->writingp = (x); }
  52
  53 #define SCM_PORT_WITH_PS_P(p)    SCM_TYP16_PREDICATE (scm_tc16_port_with_ps, p)
  54 #define SCM_PORT_WITH_PS_PORT(p) SCM_CAR (SCM_CELL_OBJECT_1 (p))
  55 #define SCM_PORT_WITH_PS_PS(p)   SCM_CDR (SCM_CELL_OBJECT_1 (p))
  56
  57 #define SCM_COERCE_OUTPORT(p) \
  58   (SCM_PORT_WITH_PS_P (p) ? SCM_PORT_WITH_PS_PORT (p) : p)
  59
  60 #define SCM_PRINT_STATE_LAYOUT "sruwuwuwuwuwpwuwuwuruoprpw"
  61 typedef struct scm_print_state {
  62   SCM handle;                   /* Struct handle */
  63   int revealed;                 /* Has the state escaped to Scheme? */
  64   unsigned long writingp;       /* Writing? */
  65   unsigned long fancyp;         /* Fancy printing? */
  66   unsigned long level;          /* Max level */
  67   unsigned long length;         /* Max number of objects per level */
  68   SCM hot_ref;                  /* Hot reference */
  69   unsigned long list_offset;
  70   unsigned long top;            /* Top of reference stack */
  71   unsigned long ceiling;        /* Max size of reference stack */
  72   SCM *ref_stack;               /* Stack of references used during
  73                                    circular reference detection */
  74   SCM ref_vect;
  75   SCM highlight_objects;        /* List of objects to be highlighted */
  76 } scm_print_state;
  77
  78 SCM_API SCM scm_print_state_vtable;
  79
  80 SCM_API scm_t_bits scm_tc16_port_with_ps;
  81
  82 SCM_API SCM scm_print_options (SCM setting);
  83 SCM_API SCM scm_make_print_state (void);
  84 SCM_API void scm_free_print_state (SCM print_state);
  85 SCM scm_i_port_with_print_state (SCM port, SCM print_state);
  86 SCM_API void scm_intprint (long n, int radix, SCM port);
  87 SCM_API void scm_ipruk (char *hdr, SCM ptr, SCM port);
  88 SCM_API void scm_iprlist (char *hdr, SCM exp, int tlr, SCM port, scm_print_state *pstate);
  89 SCM_API void scm_print_symbol_name (const char *str, size_t len, SCM port);
  90 SCM_API void scm_prin1 (SCM exp, SCM port, int writingp);
  91 SCM_API void scm_iprin1 (SCM exp, SCM port, scm_print_state *pstate);
  92 SCM_API SCM scm_write (SCM obj, SCM port);
  93 SCM_API SCM scm_display (SCM obj, SCM port);
  94 SCM_API SCM scm_simple_format (SCM port, SCM message, SCM args);
  95 SCM_API SCM scm_newline (SCM port);
  96 SCM_API SCM scm_write_char (SCM chr, SCM port);
  97 SCM_API SCM scm_printer_apply (SCM proc, SCM exp, SCM port, scm_print_state *);
  98 SCM_API SCM scm_port_with_print_state (SCM port, SCM pstate);
  99 SCM_API SCM scm_get_print_state (SCM port);
 100 SCM_API int scm_valid_oport_value_p (SCM val);
 101 SCM_API void scm_init_print (void);
 102
 103 #ifdef GUILE_DEBUG
 104 SCM_API SCM scm_current_pstate (void);
 105 #endif
 106
 107 #endif  /* SCM_PRINT_H */
 108
 109 /*
 110   Local Variables:
 111   c-file-style: "gnu"
 112   End:
 113 */