gdb/m2-lang.h

   1 /* Modula 2 language support definitions for GDB, the GNU debugger.
   2
   3    Copyright (C) 1992-2022 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef M2_LANG_H
  21 #define M2_LANG_H
  22
  23 struct type_print_options;
  24 struct parser_state;
  25
  26 /* Defined in m2-typeprint.c */
  27 extern void m2_print_type (struct type *, const char *, struct ui_file *, int,
  28                            int, const struct type_print_options *);
  29
  30 extern int m2_is_long_set (struct type *type);
  31 extern int m2_is_unbounded_array (struct type *type);
  32
  33 extern int get_long_set_bounds (struct type *type, LONGEST *low,
  34                                 LONGEST *high);
  35
  36 /* Modula-2 types */
  37
  38 struct builtin_m2_type
  39 {
  40   struct type *builtin_char = nullptr;
  41   struct type *builtin_int = nullptr;
  42   struct type *builtin_card = nullptr;
  43   struct type *builtin_real = nullptr;
  44   struct type *builtin_bool = nullptr;
  45 };
  46
  47 /* Return the Modula-2 type table for the specified architecture.  */
  48 extern const struct builtin_m2_type *builtin_m2_type (struct gdbarch *gdbarch);
  49
  50 /* Class representing the M2 language.  */
  51
  52 class m2_language : public language_defn
  53 {
  54 public:
  55   m2_language ()
  56     : language_defn (language_m2)
  57   { /* Nothing.  */ }
  58
  59   /* See language.h.  */
  60
  61   const char *name () const override
  62   { return "modula-2"; }
  63
  64   /* See language.h.  */
  65
  66   const char *natural_name () const override
  67   { return "Modula-2"; }
  68
  69   /* See language.h.  */
  70
  71   void language_arch_info (struct gdbarch *gdbarch,
  72                            struct language_arch_info *lai) const override;
  73
  74   /* See language.h.  */
  75
  76   void print_type (struct type *type, const char *varstring,
  77                    struct ui_file *stream, int show, int level,
  78                    const struct type_print_options *flags) const override
  79   {
  80     m2_print_type (type, varstring, stream, show, level, flags);
  81   }
  82
  83   /* See language.h.  */
  84
  85   void value_print_inner (struct value *val, struct ui_file *stream,
  86                           int recurse,
  87                           const struct value_print_options *options) const override;
  88
  89   /* See language.h.  */
  90
  91   int parser (struct parser_state *ps) const override;
  92
  93   /* See language.h.  */
  94
  95   void emitchar (int ch, struct type *chtype,
  96                  struct ui_file *stream, int quoter) const override;
  97
  98   /* See language.h.  */
  99
 100   void printchar (int ch, struct type *chtype,
 101                   struct ui_file *stream) const override;
 102
 103   /* See language.h.  */
 104
 105   void printstr (struct ui_file *stream, struct type *elttype,
 106                  const gdb_byte *string, unsigned int length,
 107                  const char *encoding, int force_ellipses,
 108                  const struct value_print_options *options) const override;
 109
 110   /* See language.h.  */
 111
 112   void print_typedef (struct type *type, struct symbol *new_symbol,
 113                       struct ui_file *stream) const override;
 114
 115   /* See language.h.  */
 116
 117   bool is_string_type_p (struct type *type) const override
 118   {
 119     type = check_typedef (type);
 120     if (type->code () == TYPE_CODE_ARRAY
 121         && TYPE_LENGTH (type) > 0
 122         && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
 123       {
 124         struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
 125
 126         if (TYPE_LENGTH (elttype) == 1
 127             && (elttype->code () == TYPE_CODE_INT
 128                 || elttype->code () == TYPE_CODE_CHAR))
 129           return true;
 130       }
 131
 132     return false;
 133   }
 134
 135   /* See language.h.  */
 136
 137   bool c_style_arrays_p () const override
 138   { return false; }
 139
 140   /* See language.h.  Despite not having C-style arrays, Modula-2 uses 0
 141      for its string lower bounds.  */
 142
 143   char string_lower_bound () const override
 144   { return 0; }
 145
 146   /* See language.h.  */
 147
 148   bool range_checking_on_by_default () const override
 149   { return true; }
 150 };
 151
 152 #endif /* M2_LANG_H */