gdb/scm-valprint.c

   1 /* Scheme/Guile language support routines for GDB, the GNU debugger.
   2    Copyright 1995, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "symtab.h"
  23 #include "gdbtypes.h"
  24 #include "expression.h"
  25 #include "parser-defs.h"
  26 #include "language.h"
  27 #include "value.h"
  28 #include "scm-lang.h"
  29 #include "valprint.h"
  30 #include "gdbcore.h"
  31
  32 /* FIXME: Should be in a header file that we import. */
  33 extern int c_val_print (struct type *, char *, int, CORE_ADDR,
  34                         struct ui_file *, int, int, int,
  35                         enum val_prettyprint);
  36
  37 static void scm_ipruk (char *, LONGEST, struct ui_file *);
  38 static void scm_scmlist_print (LONGEST, struct ui_file *, int, int,
  39                                int, enum val_prettyprint);
  40 static int scm_inferior_print (LONGEST, struct ui_file *, int, int,
  41                                int, enum val_prettyprint);
  42
  43 /* Prints the SCM value VALUE by invoking the inferior, if appropraite.
  44    Returns >= 0 on succes;  retunr -1 if the inferior cannot/should not
  45    print VALUE. */
  46
  47 static int
  48 scm_inferior_print (value, stream, format, deref_ref, recurse, pretty)
  49      LONGEST value;
  50      struct ui_file *stream;
  51      int format;
  52      int deref_ref;
  53      int recurse;
  54      enum val_prettyprint pretty;
  55 {
  56   return -1;
  57 }
  58
  59 /* {Names of immediate symbols}
  60  * This table must agree with the declarations in scm.h: {Immediate Symbols}.*/
  61
  62 static char *scm_isymnames[] =
  63 {
  64   /* This table must agree with the declarations */
  65   "and",
  66   "begin",
  67   "case",
  68   "cond",
  69   "do",
  70   "if",
  71   "lambda",
  72   "let",
  73   "let*",
  74   "letrec",
  75   "or",
  76   "quote",
  77   "set!",
  78   "define",
  79 #if 0
  80   "literal-variable-ref",
  81   "literal-variable-set!",
  82 #endif
  83   "apply",
  84   "call-with-current-continuation",
  85
  86  /* user visible ISYMS */
  87  /* other keywords */
  88  /* Flags */
  89
  90   "#f",
  91   "#t",
  92   "#<undefined>",
  93   "#<eof>",
  94   "()",
  95   "#<unspecified>"
  96 };
  97
  98 static void
  99 scm_scmlist_print (svalue, stream, format, deref_ref, recurse, pretty)
 100      LONGEST svalue;
 101      struct ui_file *stream;
 102      int format;
 103      int deref_ref;
 104      int recurse;
 105      enum val_prettyprint pretty;
 106 {
 107   unsigned int more = print_max;
 108   if (recurse > 6)
 109     {
 110       fputs_filtered ("...", stream);
 111       return;
 112     }
 113   scm_scmval_print (SCM_CAR (svalue), stream, format,
 114                     deref_ref, recurse + 1, pretty);
 115   svalue = SCM_CDR (svalue);
 116   for (; SCM_NIMP (svalue); svalue = SCM_CDR (svalue))
 117     {
 118       if (SCM_NECONSP (svalue))
 119         break;
 120       fputs_filtered (" ", stream);
 121       if (--more == 0)
 122         {
 123           fputs_filtered ("...", stream);
 124           return;
 125         }
 126       scm_scmval_print (SCM_CAR (svalue), stream, format,
 127                         deref_ref, recurse + 1, pretty);
 128     }
 129   if (SCM_NNULLP (svalue))
 130     {
 131       fputs_filtered (" . ", stream);
 132       scm_scmval_print (svalue, stream, format,
 133                         deref_ref, recurse + 1, pretty);
 134     }
 135 }
 136
 137 static void
 138 scm_ipruk (hdr, ptr, stream)
 139      char *hdr;
 140      LONGEST ptr;
 141      struct ui_file *stream;
 142 {
 143   fprintf_filtered (stream, "#<unknown-%s", hdr);
 144 #define SCM_SIZE TYPE_LENGTH (builtin_type_scm)
 145   if (SCM_CELLP (ptr))
 146     fprintf_filtered (stream, " (0x%lx . 0x%lx) @",
 147                       (long) SCM_CAR (ptr), (long) SCM_CDR (ptr));
 148   fprintf_filtered (stream, " 0x%s>", paddr_nz (ptr));
 149 }
 150
 151 void
 152 scm_scmval_print (svalue, stream, format, deref_ref, recurse, pretty)
 153      LONGEST svalue;
 154      struct ui_file *stream;
 155      int format;
 156      int deref_ref;
 157      int recurse;
 158      enum val_prettyprint pretty;
 159 {
 160 taloop:
 161   switch (7 & (int) svalue)
 162     {
 163     case 2:
 164     case 6:
 165       print_longest (stream, format ? format : 'd', 1, svalue >> 2);
 166       break;
 167     case 4:
 168       if (SCM_ICHRP (svalue))
 169         {
 170           svalue = SCM_ICHR (svalue);
 171           scm_printchar (svalue, stream);
 172           break;
 173         }
 174       else if (SCM_IFLAGP (svalue)
 175                && (SCM_ISYMNUM (svalue)
 176                    < (sizeof scm_isymnames / sizeof (char *))))
 177         {
 178           fputs_filtered (SCM_ISYMCHARS (svalue), stream);
 179           break;
 180         }
 181       else if (SCM_ILOCP (svalue))
 182         {
 183           fprintf_filtered (stream, "#@%ld%c%ld",
 184                             (long) SCM_IFRAME (svalue),
 185                             SCM_ICDRP (svalue) ? '-' : '+',
 186                             (long) SCM_IDIST (svalue));
 187           break;
 188         }
 189       else
 190         goto idef;
 191       break;
 192     case 1:
 193       /* gloc */
 194       svalue = SCM_CAR (svalue - 1);
 195       goto taloop;
 196     default:
 197     idef:
 198       scm_ipruk ("immediate", svalue, stream);
 199       break;
 200     case 0:
 201
 202       switch (SCM_TYP7 (svalue))
 203         {
 204         case scm_tcs_cons_gloc:
 205           if (SCM_CDR (SCM_CAR (svalue) - 1L) == 0)
 206             {
 207 #if 0
 208               SCM name;
 209 #endif
 210               fputs_filtered ("#<latte ", stream);
 211 #if 1
 212               fputs_filtered ("???", stream);
 213 #else
 214               name = ((SCM n *) (STRUCT_TYPE (exp)))[struct_i_name];
 215               scm_lfwrite (CHARS (name),
 216                            (sizet) sizeof (char),
 217                              (sizet) LENGTH (name),
 218                            port);
 219 #endif
 220               fprintf_filtered (stream, " #X%s>", paddr_nz (svalue));
 221               break;
 222             }
 223         case scm_tcs_cons_imcar:
 224         case scm_tcs_cons_nimcar:
 225           fputs_filtered ("(", stream);
 226           scm_scmlist_print (svalue, stream, format,
 227                              deref_ref, recurse + 1, pretty);
 228           fputs_filtered (")", stream);
 229           break;
 230         case scm_tcs_closures:
 231           fputs_filtered ("#<CLOSURE ", stream);
 232           scm_scmlist_print (SCM_CODE (svalue), stream, format,
 233                              deref_ref, recurse + 1, pretty);
 234           fputs_filtered (">", stream);
 235           break;
 236         case scm_tc7_string:
 237           {
 238             int len = SCM_LENGTH (svalue);
 239             CORE_ADDR addr = (CORE_ADDR) SCM_CDR (svalue);
 240             int i;
 241             int done = 0;
 242             int buf_size;
 243             char buffer[64];
 244             int truncate = print_max && len > (int) print_max;
 245             if (truncate)
 246               len = print_max;
 247             fputs_filtered ("\"", stream);
 248             for (; done < len; done += buf_size)
 249               {
 250                 buf_size = min (len - done, 64);
 251                 read_memory (addr + done, buffer, buf_size);
 252
 253                 for (i = 0; i < buf_size; ++i)
 254                   switch (buffer[i])
 255                     {
 256                     case '\"':
 257                     case '\\':
 258                       fputs_filtered ("\\", stream);
 259                     default:
 260                       fprintf_filtered (stream, "%c", buffer[i]);
 261                     }
 262               }
 263             fputs_filtered (truncate ? "...\"" : "\"", stream);
 264             break;
 265           }
 266           break;
 267         case scm_tcs_symbols:
 268           {
 269             int len = SCM_LENGTH (svalue);
 270
 271             char *str = (char *) alloca (len);
 272             read_memory (SCM_CDR (svalue), str, len + 1);
 273             /* Should handle weird characters FIXME */
 274             str[len] = '\0';
 275             fputs_filtered (str, stream);
 276             break;
 277           }
 278         case scm_tc7_vector:
 279           {
 280             int len = SCM_LENGTH (svalue);
 281             int i;
 282             LONGEST elements = SCM_CDR (svalue);
 283             fputs_filtered ("#(", stream);
 284             for (i = 0; i < len; ++i)
 285               {
 286                 if (i > 0)
 287                   fputs_filtered (" ", stream);
 288                 scm_scmval_print (scm_get_field (elements, i), stream, format,
 289                                   deref_ref, recurse + 1, pretty);
 290               }
 291             fputs_filtered (")", stream);
 292           }
 293           break;
 294 #if 0
 295         case tc7_lvector:
 296           {
 297             SCM result;
 298             SCM hook;
 299             hook = scm_get_lvector_hook (exp, LV_PRINT_FN);
 300             if (hook == BOOL_F)
 301               {
 302                 scm_puts ("#<locked-vector ", port);
 303                 scm_intprint (CDR (exp), 16, port);
 304                 scm_puts (">", port);
 305               }
 306             else
 307               {
 308                 result
 309                   = scm_apply (hook,
 310                         scm_listify (exp, port, (writing ? BOOL_T : BOOL_F),
 311                                      SCM_UNDEFINED),
 312                                EOL);
 313                 if (result == BOOL_F)
 314                   goto punk;
 315               }
 316             break;
 317           }
 318           break;
 319         case tc7_bvect:
 320         case tc7_ivect:
 321         case tc7_uvect:
 322         case tc7_fvect:
 323         case tc7_dvect:
 324         case tc7_cvect:
 325           scm_raprin1 (exp, port, writing);
 326           break;
 327 #endif
 328         case scm_tcs_subrs:
 329           {
 330             int index = SCM_CAR (svalue) >> 8;
 331 #if 1
 332             char str[20];
 333             sprintf (str, "#%d", index);
 334 #else
 335             char *str = index ? SCM_CHARS (scm_heap_org + index) : "";
 336 #define SCM_CHARS(x) ((char *)(SCM_CDR(x)))
 337             char *str = CHARS (SNAME (exp));
 338 #endif
 339             fprintf_filtered (stream, "#<primitive-procedure %s>",
 340                               str);
 341           }
 342           break;
 343 #if 0
 344 #ifdef CCLO
 345         case tc7_cclo:
 346           scm_puts ("#<compiled-closure ", port);
 347           scm_iprin1 (CCLO_SUBR (exp), port, writing);
 348           scm_putc ('>', port);
 349           break;
 350 #endif
 351         case tc7_contin:
 352           fprintf_filtered (stream, "#<continuation %d @ #X%lx >",
 353                             LENGTH (svalue),
 354                             (long) CHARS (svalue));
 355           break;
 356         case tc7_port:
 357           i = PTOBNUM (exp);
 358           if (i < scm_numptob && scm_ptobs[i].print && (scm_ptobs[i].print) (exp, port, writing))
 359             break;
 360           goto punk;
 361         case tc7_smob:
 362           i = SMOBNUM (exp);
 363           if (i < scm_numsmob && scm_smobs[i].print
 364               && (scm_smobs[i].print) (exp, port, writing))
 365             break;
 366           goto punk;
 367 #endif
 368         default:
 369 #if 0
 370         punk:
 371 #endif
 372           scm_ipruk ("type", svalue, stream);
 373         }
 374       break;
 375     }
 376 }
 377
 378 int
 379 scm_val_print (type, valaddr, embedded_offset, address,
 380                stream, format, deref_ref, recurse, pretty)
 381      struct type *type;
 382      char *valaddr;
 383      int embedded_offset;
 384      CORE_ADDR address;
 385      struct ui_file *stream;
 386      int format;
 387      int deref_ref;
 388      int recurse;
 389      enum val_prettyprint pretty;
 390 {
 391   if (is_scmvalue_type (type))
 392     {
 393       LONGEST svalue = extract_signed_integer (valaddr, TYPE_LENGTH (type));
 394       if (scm_inferior_print (svalue, stream, format,
 395                               deref_ref, recurse, pretty) >= 0)
 396         {
 397         }
 398       else
 399         {
 400           scm_scmval_print (svalue, stream, format,
 401                             deref_ref, recurse, pretty);
 402         }
 403
 404       gdb_flush (stream);
 405       return (0);
 406     }
 407   else
 408     {
 409       return c_val_print (type, valaddr, 0, address, stream, format,
 410                           deref_ref, recurse, pretty);
 411     }
 412 }
 413
 414 int
 415 scm_value_print (val, stream, format, pretty)
 416      value_ptr val;
 417      struct ui_file *stream;
 418      int format;
 419      enum val_prettyprint pretty;
 420 {
 421   return (val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0,
 422                      VALUE_ADDRESS (val), stream, format, 1, 0, pretty));
 423 }