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