gdb/scm-valprint.c

   1 /* Scheme/Guile language support routines for GDB, the GNU debugger.
   2    Copyright 1995, 1996, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "symtab.h"
  24 #include "gdbtypes.h"
  25 #include "expression.h"
  26 #include "parser-defs.h"
  27 #include "language.h"
  28 #include "value.h"
  29 #include "scm-lang.h"
  30 #include "valprint.h"
  31 #include "gdbcore.h"
  32
  33 /* FIXME: Should be in a header file that we import. */
  34 extern int c_val_print (struct type *, char *, int, CORE_ADDR,
  35                         struct ui_file *, int, int, int,
  36                         enum val_prettyprint);
  37
  38 static void scm_ipruk (char *, LONGEST, struct ui_file *);
  39 static void scm_scmlist_print (LONGEST, struct ui_file *, int, int,
  40                                int, enum val_prettyprint);
  41 static int scm_inferior_print (LONGEST, struct ui_file *, int, int,
  42                                int, enum val_prettyprint);
  43
  44 /* Prints the SCM value VALUE by invoking the inferior, if appropraite.
  45    Returns >= 0 on succes;  retunr -1 if the inferior cannot/should not
  46    print VALUE. */
  47
  48 static int
  49 scm_inferior_print (LONGEST value, struct ui_file *stream, int format,
  50                     int deref_ref, int recurse, enum val_prettyprint pretty)
  51 {
  52   return -1;
  53 }
  54
  55 /* {Names of immediate symbols}
  56  * This table must agree with the declarations in scm.h: {Immediate Symbols}.*/
  57
  58 static char *scm_isymnames[] =
  59 {
  60   /* This table must agree with the declarations */
  61   "and",
  62   "begin",
  63   "case",
  64   "cond",
  65   "do",
  66   "if",
  67   "lambda",
  68   "let",
  69   "let*",
  70   "letrec",
  71   "or",
  72   "quote",
  73   "set!",
  74   "define",
  75 #if 0
  76   "literal-variable-ref",
  77   "literal-variable-set!",
  78 #endif
  79   "apply",
  80   "call-with-current-continuation",
  81
  82  /* user visible ISYMS */
  83  /* other keywords */
  84  /* Flags */
  85
  86   "#f",
  87   "#t",
  88   "#<undefined>",
  89   "#<eof>",
  90   "()",
  91   "#<unspecified>"
  92 };
  93
  94 static void
  95 scm_scmlist_print (LONGEST svalue, struct ui_file *stream, int format,
  96                    int deref_ref, int recurse, enum val_prettyprint pretty)
  97 {
  98   unsigned int more = print_max;
  99   if (recurse > 6)
 100     {
 101       fputs_filtered ("...", stream);
 102       return;
 103     }
 104   scm_scmval_print (SCM_CAR (svalue), stream, format,
 105                     deref_ref, recurse + 1, pretty);
 106   svalue = SCM_CDR (svalue);
 107   for (; SCM_NIMP (svalue); svalue = SCM_CDR (svalue))
 108     {
 109       if (SCM_NECONSP (svalue))
 110         break;
 111       fputs_filtered (" ", stream);
 112       if (--more == 0)
 113         {
 114           fputs_filtered ("...", stream);
 115           return;
 116         }
 117       scm_scmval_print (SCM_CAR (svalue), stream, format,
 118                         deref_ref, recurse + 1, pretty);
 119     }
 120   if (SCM_NNULLP (svalue))
 121     {
 122       fputs_filtered (" . ", stream);
 123       scm_scmval_print (svalue, stream, format,
 124                         deref_ref, recurse + 1, pretty);
 125     }
 126 }
 127
 128 static void
 129 scm_ipruk (char *hdr, LONGEST ptr, struct ui_file *stream)
 130 {
 131   fprintf_filtered (stream, "#<unknown-%s", hdr);
 132 #define SCM_SIZE TYPE_LENGTH (builtin_type_scm)
 133   if (SCM_CELLP (ptr))
 134     fprintf_filtered (stream, " (0x%lx . 0x%lx) @",
 135                       (long) SCM_CAR (ptr), (long) SCM_CDR (ptr));
 136   fprintf_filtered (stream, " 0x%s>", paddr_nz (ptr));
 137 }
 138
 139 void
 140 scm_scmval_print (LONGEST svalue, struct ui_file *stream, int format,
 141                   int deref_ref, int recurse, enum val_prettyprint pretty)
 142 {
 143 taloop:
 144   switch (7 & (int) svalue)
 145     {
 146     case 2:
 147     case 6:
 148       print_longest (stream, format ? format : 'd', 1, svalue >> 2);
 149       break;
 150     case 4:
 151       if (SCM_ICHRP (svalue))
 152         {
 153           svalue = SCM_ICHR (svalue);
 154           scm_printchar (svalue, stream);
 155           break;
 156         }
 157       else if (SCM_IFLAGP (svalue)
 158                && (SCM_ISYMNUM (svalue)
 159                    < (sizeof scm_isymnames / sizeof (char *))))
 160         {
 161           fputs_filtered (SCM_ISYMCHARS (svalue), stream);
 162           break;
 163         }
 164       else if (SCM_ILOCP (svalue))
 165         {
 166           fprintf_filtered (stream, "#@%ld%c%ld",
 167                             (long) SCM_IFRAME (svalue),
 168                             SCM_ICDRP (svalue) ? '-' : '+',
 169                             (long) SCM_IDIST (svalue));
 170           break;
 171         }
 172       else
 173         goto idef;
 174       break;
 175     case 1:
 176       /* gloc */
 177       svalue = SCM_CAR (svalue - 1);
 178       goto taloop;
 179     default:
 180     idef:
 181       scm_ipruk ("immediate", svalue, stream);
 182       break;
 183     case 0:
 184
 185       switch (SCM_TYP7 (svalue))
 186         {
 187         case scm_tcs_cons_gloc:
 188           if (SCM_CDR (SCM_CAR (svalue) - 1L) == 0)
 189             {
 190 #if 0
 191               SCM name;
 192 #endif
 193               fputs_filtered ("#<latte ", stream);
 194 #if 1
 195               fputs_filtered ("???", stream);
 196 #else
 197               name = ((SCM n *) (STRUCT_TYPE (exp)))[struct_i_name];
 198               scm_lfwrite (CHARS (name),
 199                            (sizet) sizeof (char),
 200                              (sizet) LENGTH (name),
 201                            port);
 202 #endif
 203               fprintf_filtered (stream, " #X%s>", paddr_nz (svalue));
 204               break;
 205             }
 206         case scm_tcs_cons_imcar:
 207         case scm_tcs_cons_nimcar:
 208           fputs_filtered ("(", stream);
 209           scm_scmlist_print (svalue, stream, format,
 210                              deref_ref, recurse + 1, pretty);
 211           fputs_filtered (")", stream);
 212           break;
 213         case scm_tcs_closures:
 214           fputs_filtered ("#<CLOSURE ", stream);
 215           scm_scmlist_print (SCM_CODE (svalue), stream, format,
 216                              deref_ref, recurse + 1, pretty);
 217           fputs_filtered (">", stream);
 218           break;
 219         case scm_tc7_string:
 220           {
 221             int len = SCM_LENGTH (svalue);
 222             CORE_ADDR addr = (CORE_ADDR) SCM_CDR (svalue);
 223             int i;
 224             int done = 0;
 225             int buf_size;
 226             char buffer[64];
 227             int truncate = print_max && len > (int) print_max;
 228             if (truncate)
 229               len = print_max;
 230             fputs_filtered ("\"", stream);
 231             for (; done < len; done += buf_size)
 232               {
 233                 buf_size = min (len - done, 64);
 234                 read_memory (addr + done, buffer, buf_size);
 235
 236                 for (i = 0; i < buf_size; ++i)
 237                   switch (buffer[i])
 238                     {
 239                     case '\"':
 240                     case '\\':
 241                       fputs_filtered ("\\", stream);
 242                     default:
 243                       fprintf_filtered (stream, "%c", buffer[i]);
 244                     }
 245               }
 246             fputs_filtered (truncate ? "...\"" : "\"", stream);
 247             break;
 248           }
 249           break;
 250         case scm_tcs_symbols:
 251           {
 252             int len = SCM_LENGTH (svalue);
 253
 254             char *str = (char *) alloca (len);
 255             read_memory (SCM_CDR (svalue), str, len + 1);
 256             /* Should handle weird characters FIXME */
 257             str[len] = '\0';
 258             fputs_filtered (str, stream);
 259             break;
 260           }
 261         case scm_tc7_vector:
 262           {
 263             int len = SCM_LENGTH (svalue);
 264             int i;
 265             LONGEST elements = SCM_CDR (svalue);
 266             fputs_filtered ("#(", stream);
 267             for (i = 0; i < len; ++i)
 268               {
 269                 if (i > 0)
 270                   fputs_filtered (" ", stream);
 271                 scm_scmval_print (scm_get_field (elements, i), stream, format,
 272                                   deref_ref, recurse + 1, pretty);
 273               }
 274             fputs_filtered (")", stream);
 275           }
 276           break;
 277 #if 0
 278         case tc7_lvector:
 279           {
 280             SCM result;
 281             SCM hook;
 282             hook = scm_get_lvector_hook (exp, LV_PRINT_FN);
 283             if (hook == BOOL_F)
 284               {
 285                 scm_puts ("#<locked-vector ", port);
 286                 scm_intprint (CDR (exp), 16, port);
 287                 scm_puts (">", port);
 288               }
 289             else
 290               {
 291                 result
 292                   = scm_apply (hook,
 293                         scm_listify (exp, port, (writing ? BOOL_T : BOOL_F),
 294                                      SCM_UNDEFINED),
 295                                EOL);
 296                 if (result == BOOL_F)
 297                   goto punk;
 298               }
 299             break;
 300           }
 301           break;
 302         case tc7_bvect:
 303         case tc7_ivect:
 304         case tc7_uvect:
 305         case tc7_fvect:
 306         case tc7_dvect:
 307         case tc7_cvect:
 308           scm_raprin1 (exp, port, writing);
 309           break;
 310 #endif
 311         case scm_tcs_subrs:
 312           {
 313             int index = SCM_CAR (svalue) >> 8;
 314 #if 1
 315             char str[20];
 316             sprintf (str, "#%d", index);
 317 #else
 318             char *str = index ? SCM_CHARS (scm_heap_org + index) : "";
 319 #define SCM_CHARS(x) ((char *)(SCM_CDR(x)))
 320             char *str = CHARS (SNAME (exp));
 321 #endif
 322             fprintf_filtered (stream, "#<primitive-procedure %s>",
 323                               str);
 324           }
 325           break;
 326 #if 0
 327 #ifdef CCLO
 328         case tc7_cclo:
 329           scm_puts ("#<compiled-closure ", port);
 330           scm_iprin1 (CCLO_SUBR (exp), port, writing);
 331           scm_putc ('>', port);
 332           break;
 333 #endif
 334         case tc7_contin:
 335           fprintf_filtered (stream, "#<continuation %d @ #X%lx >",
 336                             LENGTH (svalue),
 337                             (long) CHARS (svalue));
 338           break;
 339         case tc7_port:
 340           i = PTOBNUM (exp);
 341           if (i < scm_numptob && scm_ptobs[i].print && (scm_ptobs[i].print) (exp, port, writing))
 342             break;
 343           goto punk;
 344         case tc7_smob:
 345           i = SMOBNUM (exp);
 346           if (i < scm_numsmob && scm_smobs[i].print
 347               && (scm_smobs[i].print) (exp, port, writing))
 348             break;
 349           goto punk;
 350 #endif
 351         default:
 352 #if 0
 353         punk:
 354 #endif
 355           scm_ipruk ("type", svalue, stream);
 356         }
 357       break;
 358     }
 359 }
 360
 361 int
 362 scm_val_print (struct type *type, char *valaddr, int embedded_offset,
 363                CORE_ADDR address, struct ui_file *stream, int format,
 364                int deref_ref, int recurse, enum val_prettyprint pretty)
 365 {
 366   if (is_scmvalue_type (type))
 367     {
 368       LONGEST svalue = extract_signed_integer (valaddr, TYPE_LENGTH (type));
 369       if (scm_inferior_print (svalue, stream, format,
 370                               deref_ref, recurse, pretty) >= 0)
 371         {
 372         }
 373       else
 374         {
 375           scm_scmval_print (svalue, stream, format,
 376                             deref_ref, recurse, pretty);
 377         }
 378
 379       gdb_flush (stream);
 380       return (0);
 381     }
 382   else
 383     {
 384       return c_val_print (type, valaddr, 0, address, stream, format,
 385                           deref_ref, recurse, pretty);
 386     }
 387 }
 388
 389 int
 390 scm_value_print (struct value *val, struct ui_file *stream, int format,
 391                  enum val_prettyprint pretty)
 392 {
 393   return (val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0,
 394                      VALUE_ADDRESS (val), stream, format, 1, 0, pretty));
 395 }