gdb/scm-valprint.c

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