gdb/ch-valprint.c

   1 /* Support for printing Chill values for GDB, the GNU debugger.
   2    Copyright 1986, 1988, 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "defs.h"
  21 #include "obstack.h"
  22 #include "symtab.h"
  23 #include "gdbtypes.h"
  24 #include "valprint.h"
  25 #include "expression.h"
  26 #include "language.h"
  27
  28 \f
  29 /* Print data of type TYPE located at VALADDR (within GDB), which came from
  30    the inferior at address ADDRESS, onto stdio stream STREAM according to
  31    FORMAT (a letter or 0 for natural format).  The data at VALADDR is in
  32    target byte order.
  33
  34    If the data are a string pointer, returns the number of string characters
  35    printed.
  36
  37    If DEREF_REF is nonzero, then dereference references, otherwise just print
  38    them like pointers.
  39
  40    The PRETTY parameter controls prettyprinting.  */
  41
  42 int
  43 chill_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
  44                  pretty)
  45      struct type *type;
  46      char *valaddr;
  47      CORE_ADDR address;
  48      FILE *stream;
  49      int format;
  50      int deref_ref;
  51      int recurse;
  52      enum val_prettyprint pretty;
  53 {
  54   LONGEST val;
  55   unsigned int i = 0;           /* Number of characters printed.  */
  56   struct type *elttype;
  57   unsigned eltlen;
  58   CORE_ADDR addr;
  59
  60   switch (TYPE_CODE (type))
  61     {
  62     case TYPE_CODE_ARRAY:
  63       if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
  64         {
  65           if (prettyprint_arrays)
  66             {
  67               print_spaces_filtered (2 + 2 * recurse, stream);
  68             }
  69           fprintf_filtered (stream, "[");
  70           val_print_array_elements (type, valaddr, address, stream, format,
  71                                     deref_ref, recurse, pretty, 0);
  72           fprintf_filtered (stream, "]");
  73         }
  74       else
  75         {
  76           error ("unimplemented in chill_val_print; unspecified array length");
  77         }
  78       break;
  79
  80     case TYPE_CODE_INT:
  81       format = format ? format : output_format;
  82       if (format)
  83         {
  84           print_scalar_formatted (valaddr, type, format, 0, stream);
  85         }
  86       else
  87         {
  88           val_print_type_code_int (type, valaddr, stream);
  89         }
  90       break;
  91
  92     case TYPE_CODE_CHAR:
  93       format = format ? format : output_format;
  94       if (format)
  95         {
  96           print_scalar_formatted (valaddr, type, format, 0, stream);
  97         }
  98       else
  99         {
 100           LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
 101                          stream);
 102         }
 103       break;
 104
 105     case TYPE_CODE_FLT:
 106       if (format)
 107         {
 108           print_scalar_formatted (valaddr, type, format, 0, stream);
 109         }
 110       else
 111         {
 112           print_floating (valaddr, type, stream);
 113         }
 114       break;
 115
 116     case TYPE_CODE_BOOL:
 117       format = format ? format : output_format;
 118       if (format)
 119         {
 120           print_scalar_formatted (valaddr, type, format, 0, stream);
 121         }
 122       else
 123         {
 124           val = unpack_long (builtin_type_chill_bool, valaddr);
 125           fprintf_filtered (stream, val ? "TRUE" : "FALSE");
 126         }
 127       break;
 128
 129     case TYPE_CODE_UNDEF:
 130       /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
 131          dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
 132          and no complete type for struct foo in that file.  */
 133       fprintf_filtered (stream, "<incomplete type>");
 134       break;
 135
 136     case TYPE_CODE_PTR:
 137       if (format && format != 's')
 138         {
 139           print_scalar_formatted (valaddr, type, format, 0, stream);
 140           break;
 141         }
 142       addr = unpack_pointer (type, valaddr);
 143       elttype = TYPE_TARGET_TYPE (type);
 144
 145       if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
 146         {
 147           /* Try to print what function it points to.  */
 148           print_address_demangle (addr, stream, demangle);
 149           /* Return value is irrelevant except for string pointers.  */
 150           return (0);
 151         }
 152       if (addressprint && format != 's')
 153         {
 154           fprintf_filtered (stream, "0x%x", addr);
 155         }
 156
 157       /* For a pointer to char or unsigned char, also print the string
 158          pointed to, unless pointer is null.  */
 159       if (TYPE_LENGTH (elttype) == 1
 160           && TYPE_CODE (elttype) == TYPE_CODE_CHAR
 161           && (format == 0 || format == 's')
 162           && addr != 0
 163           && /* If print_max is UINT_MAX, the alloca below will fail.
 164                 In that case don't try to print the string.  */
 165           print_max < UINT_MAX)
 166           {
 167             i = val_print_string (addr, stream);
 168           }
 169       /* Return number of characters printed, plus one for the
 170          terminating null if we have "reached the end".  */
 171       return (i + (print_max && i != print_max));
 172       break;
 173
 174     case TYPE_CODE_STRING:
 175       if (format && format != 's')
 176         {
 177           print_scalar_formatted (valaddr, type, format, 0, stream);
 178           break;
 179         }
 180       if (addressprint && format != 's')
 181         {
 182           fprintf_filtered (stream, "0x%x ", addr);
 183         }
 184       i = TYPE_LENGTH (type);
 185       LA_PRINT_STRING (stream, valaddr, i, 0);
 186       /* Return number of characters printed, plus one for the terminating
 187          null if we have "reached the end".  */
 188       return (i + (print_max && i != print_max));
 189       break;
 190
 191     case TYPE_CODE_MEMBER:
 192     case TYPE_CODE_REF:
 193     case TYPE_CODE_UNION:
 194     case TYPE_CODE_STRUCT:
 195     case TYPE_CODE_ENUM:
 196     case TYPE_CODE_FUNC:
 197     case TYPE_CODE_VOID:
 198     case TYPE_CODE_ERROR:
 199     case TYPE_CODE_RANGE:
 200       error ("Unimplemented chill_val_print support for type %d",
 201              TYPE_CODE (type));
 202       break;
 203
 204     default:
 205       error ("Invalid Chill type code %d in symbol table.", TYPE_CODE (type));
 206     }
 207   fflush (stream);
 208   return (0);
 209 }