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