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/* Scheme/Guile language support routines for GDB, the GNU debugger.

   Copyright 1995, 2000 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "defs.h"

#include "symtab.h"

#include "gdbtypes.h"

#include "expression.h"

#include "parser-defs.h"

#include "language.h"

#include "value.h"

#include "scm-lang.h"

#include "valprint.h"

#include "gdbcore.h"

/* FIXME: Should be in a header file that we import. */

extern int c_val_print (struct type *, char *, int, CORE_ADDR,

                        struct ui_file *, int, int, int,

                        enum val_prettyprint);

static void scm_ipruk (char *, LONGEST, struct ui_file *);

static void scm_scmlist_print (LONGEST, struct ui_file *, int, int,

                               int, enum val_prettyprint);

static int scm_inferior_print (LONGEST, struct ui_file *, int, int,

                               int, enum val_prettyprint);

/* Prints the SCM value VALUE by invoking the inferior, if appropraite.

   Returns >= 0 on succes;  retunr -1 if the inferior cannot/should not

   print VALUE. */

static int

scm_inferior_print (value, stream, format, deref_ref, recurse, pretty)

     LONGEST value;

     struct ui_file *stream;

     int format;

     int deref_ref;

     int recurse;

     enum val_prettyprint pretty;

{

  return -1;

}

/* {Names of immediate symbols}

 * This table must agree with the declarations in scm.h: {Immediate Symbols}.*/

static char *scm_isymnames[] =

{

  /* This table must agree with the declarations */

  "and",

  "begin",

  "case",

  "cond",

  "do",

  "if",

  "lambda",

  "let",

  "let*",

  "letrec",

  "or",

  "quote",

  "set!",

  "define",

#if 0

  "literal-variable-ref",

  "literal-variable-set!",

#endif

  "apply",

  "call-with-current-continuation",

 /* user visible ISYMS */

 /* other keywords */

 /* Flags */

  "#f",

  "#t",

  "#<undefined>",

  "#<eof>",

  "()",

  "#<unspecified>"

};

static void

scm_scmlist_print (svalue, stream, format, deref_ref, recurse, pretty)

     LONGEST svalue;

     struct ui_file *stream;

     int format;

     int deref_ref;

     int recurse;

     enum val_prettyprint pretty;

{

  unsigned int more = print_max;

  if (recurse > 6)

    {

      fputs_filtered ("...", stream);

      return;

    }

  scm_scmval_print (SCM_CAR (svalue), stream, format,

                    deref_ref, recurse + 1, pretty);

  svalue = SCM_CDR (svalue);

  for (; SCM_NIMP (svalue); svalue = SCM_CDR (svalue))

    {

      if (SCM_NECONSP (svalue))

        break;

      fputs_filtered (" ", stream);

      if (--more == 0)

        {

          fputs_filtered ("...", stream);

          return;

        }

      scm_scmval_print (SCM_CAR (svalue), stream, format,

                        deref_ref, recurse + 1, pretty);

    }

  if (SCM_NNULLP (svalue))

    {

      fputs_filtered (" . ", stream);

      scm_scmval_print (svalue, stream, format,

                        deref_ref, recurse + 1, pretty);

    }

}

static void

scm_ipruk (hdr, ptr, stream)

     char *hdr;

     LONGEST ptr;

     struct ui_file *stream;

{

  fprintf_filtered (stream, "#<unknown-%s", hdr);

#define SCM_SIZE TYPE_LENGTH (builtin_type_scm)

  if (SCM_CELLP (ptr))

    fprintf_filtered (stream, " (0x%lx . 0x%lx) @",

                      (long) SCM_CAR (ptr), (long) SCM_CDR (ptr));

  fprintf_filtered (stream, " 0x%s>", paddr_nz (ptr));

}

void

scm_scmval_print (svalue, stream, format, deref_ref, recurse, pretty)

     LONGEST svalue;

     struct ui_file *stream;

     int format;

     int deref_ref;

     int recurse;

     enum val_prettyprint pretty;

{

taloop:

  switch (7 & (int) svalue)

    {

    case 2:

    case 6:

      print_longest (stream, format ? format : 'd', 1, svalue >> 2);

      break;

    case 4:

      if (SCM_ICHRP (svalue))

        {

          svalue = SCM_ICHR (svalue);

          scm_printchar (svalue, stream);

          break;

        }

      else if (SCM_IFLAGP (svalue)

               && (SCM_ISYMNUM (svalue)

                   < (sizeof scm_isymnames / sizeof (char *))))

        {

          fputs_filtered (SCM_ISYMCHARS (svalue), stream);

          break;

        }

      else if (SCM_ILOCP (svalue))

        {

          fprintf_filtered (stream, "#@%ld%c%ld",

                            (long) SCM_IFRAME (svalue),

                            SCM_ICDRP (svalue) ? '-' : '+',

                            (long) SCM_IDIST (svalue));

          break;

        }

      else

        goto idef;

      break;

    case 1:

      /* gloc */

      svalue = SCM_CAR (svalue - 1);

      goto taloop;

    default:

    idef:

      scm_ipruk ("immediate", svalue, stream);

      break;

    case 0:

      switch (SCM_TYP7 (svalue))

        {

        case scm_tcs_cons_gloc:

          if (SCM_CDR (SCM_CAR (svalue) - 1L) == 0)

            {

#if 0

              SCM name;

#endif

              fputs_filtered ("#<latte ", stream);

#if 1

              fputs_filtered ("???", stream);

#else

              name = ((SCM n *) (STRUCT_TYPE (exp)))[struct_i_name];

              scm_lfwrite (CHARS (name),

                           (sizet) sizeof (char),

                             (sizet) LENGTH (name),

                           port);

#endif

              fprintf_filtered (stream, " #X%s>", paddr_nz (svalue));

              break;

            }

        case scm_tcs_cons_imcar:

        case scm_tcs_cons_nimcar:

          fputs_filtered ("(", stream);

          scm_scmlist_print (svalue, stream, format,

                             deref_ref, recurse + 1, pretty);

          fputs_filtered (")", stream);

          break;

        case scm_tcs_closures:

          fputs_filtered ("#<CLOSURE ", stream);

          scm_scmlist_print (SCM_CODE (svalue), stream, format,

                             deref_ref, recurse + 1, pretty);

          fputs_filtered (">", stream);

          break;

        case scm_tc7_string:

          {

            int len = SCM_LENGTH (svalue);

            CORE_ADDR addr = (CORE_ADDR) SCM_CDR (svalue);

            int i;

            int done = 0;

            int buf_size;

            char buffer[64];

            int truncate = print_max && len > (int) print_max;

            if (truncate)

              len = print_max;

            fputs_filtered ("\"", stream);

            for (; done < len; done += buf_size)

              {

                buf_size = min (len - done, 64);

                read_memory (addr + done, buffer, buf_size);

                for (i = 0; i < buf_size; ++i)

                  switch (buffer[i])

                    {

                    case '\"':

                    case '\\':

                      fputs_filtered ("\\", stream);

                    default:

                      fprintf_filtered (stream, "%c", buffer[i]);

                    }

              }

            fputs_filtered (truncate ? "...\"" : "\"", stream);

            break;

          }

          break;

        case scm_tcs_symbols:

          {

            int len = SCM_LENGTH (svalue);

            char *str = (char *) alloca (len);

            read_memory (SCM_CDR (svalue), str, len + 1);

            /* Should handle weird characters FIXME */

            str[len] = '\0';

            fputs_filtered (str, stream);

            break;

          }

        case scm_tc7_vector:

          {

            int len = SCM_LENGTH (svalue);

            int i;

            LONGEST elements = SCM_CDR (svalue);

            fputs_filtered ("#(", stream);

            for (i = 0; i < len; ++i)

              {

                if (i > 0)

                  fputs_filtered (" ", stream);

                scm_scmval_print (scm_get_field (elements, i), stream, format,

                                  deref_ref, recurse + 1, pretty);

              }

            fputs_filtered (")", stream);

          }

          break;

#if 0

        case tc7_lvector:

          {

            SCM result;

            SCM hook;

            hook = scm_get_lvector_hook (exp, LV_PRINT_FN);

            if (hook == BOOL_F)

              {

                scm_puts ("#<locked-vector ", port);

                scm_intprint (CDR (exp), 16, port);

                scm_puts (">", port);

              }

            else

              {

                result

                  = scm_apply (hook,

                        scm_listify (exp, port, (writing ? BOOL_T : BOOL_F),

                                     SCM_UNDEFINED),

                               EOL);

                if (result == BOOL_F)

                  goto punk;

              }

            break;

          }

          break;

        case tc7_bvect:

        case tc7_ivect:

        case tc7_uvect:

        case tc7_fvect:

        case tc7_dvect:

        case tc7_cvect:

          scm_raprin1 (exp, port, writing);

          break;

#endif

        case scm_tcs_subrs:

          {

            int index = SCM_CAR (svalue) >> 8;

#if 1

            char str[20];

            sprintf (str, "#%d", index);

#else

            char *str = index ? SCM_CHARS (scm_heap_org + index) : "";

#define SCM_CHARS(x) ((char *)(SCM_CDR(x)))

            char *str = CHARS (SNAME (exp));

#endif

            fprintf_filtered (stream, "#<primitive-procedure %s>",

                              str);

          }

          break;

#if 0

#ifdef CCLO

        case tc7_cclo:

          scm_puts ("#<compiled-closure ", port);

          scm_iprin1 (CCLO_SUBR (exp), port, writing);

          scm_putc ('>', port);

          break;

#endif

        case tc7_contin:

          fprintf_filtered (stream, "#<continuation %d @ #X%lx >",

                            LENGTH (svalue),

                            (long) CHARS (svalue));

          break;

        case tc7_port:

          i = PTOBNUM (exp);

          if (i < scm_numptob && scm_ptobs[i].print && (scm_ptobs[i].print) (exp, port, writing))

            break;

          goto punk;

        case tc7_smob:

          i = SMOBNUM (exp);

          if (i < scm_numsmob && scm_smobs[i].print

              && (scm_smobs[i].print) (exp, port, writing))

            break;

          goto punk;

#endif

        default:

#if 0

        punk:

#endif

          scm_ipruk ("type", svalue, stream);

        }

      break;

    }

}

int

scm_val_print (type, valaddr, embedded_offset, address,

               stream, format, deref_ref, recurse, pretty)

     struct type *type;

     char *valaddr;

     int embedded_offset;

     CORE_ADDR address;

     struct ui_file *stream;

     int format;

     int deref_ref;

     int recurse;

     enum val_prettyprint pretty;

{

  if (is_scmvalue_type (type))

    {

      LONGEST svalue = extract_signed_integer (valaddr, TYPE_LENGTH (type));

      if (scm_inferior_print (svalue, stream, format,

                              deref_ref, recurse, pretty) >= 0)

        {

        }

      else

        {

          scm_scmval_print (svalue, stream, format,

                            deref_ref, recurse, pretty);

        }

      gdb_flush (stream);

      return (0);

    }

  else

    {

      return c_val_print (type, valaddr, 0, address, stream, format,

                          deref_ref, recurse, pretty);

    }

}

int

scm_value_print (val, stream, format, pretty)

     value_ptr val;

     struct ui_file *stream;

     int format;

     enum val_prettyprint pretty;

{

  return (val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0,

                     VALUE_ADDRESS (val), stream, format, 1, 0, pretty));

}