aboutsummaryrefslogtreecommitdiff
path: root/gdb/dictionary.h
blob: 44bd075fcf220efc80653b46237a93694a516f01 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
/* Routines for name->symbol lookups in GDB.
   
   Copyright (C) 2003-2023 Free Software Foundation, Inc.

   Contributed by David Carlton <carlton@bactrian.org> and by Kealia,
   Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef DICTIONARY_H
#define DICTIONARY_H

#include "symfile.h"

/* An opaque type for multi-language dictionaries; only dictionary.c should
   know about its innards.  */

struct multidictionary;

/* Other types needed for declarations.  */

struct symbol;
struct obstack;
struct pending;
struct language_defn;

/* The creation functions for various implementations of
   multi-language dictionaries.  */

/* Create a multi-language dictionary of symbols implemented via
   a fixed-size hashtable.  All memory it uses is allocated on
   OBSTACK; the environment is initialized from SYMBOL_LIST.  */

extern struct multidictionary *
  mdict_create_hashed (struct obstack *obstack,
		       const struct pending *symbol_list);

/* Create a multi-language dictionary of symbols, implemented
   via a hashtable that grows as necessary.  The initial dictionary of
   LANGUAGE is empty; to add symbols to it, call mdict_add_symbol().
   Call mdict_free() when you're done with it.  */

extern struct multidictionary *
  mdict_create_hashed_expandable (enum language language);

/* Create a multi-language dictionary of symbols, implemented
   via a fixed-size array.  All memory it uses is allocated on
   OBSTACK; the environment is initialized from the SYMBOL_LIST.  The
   symbols are ordered in the same order that they're found in
   SYMBOL_LIST.  */

extern struct multidictionary *
  mdict_create_linear (struct obstack *obstack,
		       const struct pending *symbol_list);

/* Create a multi-language dictionary of symbols, implemented
   via an array that grows as necessary.  The multidictionary initially
   contains a single empty dictionary of LANGUAGE; to add symbols to it,
   call mdict_add_symbol().  Call mdict_free() when you're done with it.  */

extern struct multidictionary *
  mdict_create_linear_expandable (enum language language);

/* The functions providing the interface to multi-language dictionaries.
   Note that the most common parts of the interface, namely symbol lookup,
   are only provided via iterator functions.  */

/* Free the memory used by a multidictionary that's not on an obstack.  (If
   any.)  */

extern void mdict_free (struct multidictionary *mdict);

/* Add a symbol to an expandable multidictionary.  */

extern void mdict_add_symbol (struct multidictionary *mdict,
			      struct symbol *sym);

/* Utility to add a list of symbols to a multidictionary.  */

extern void mdict_add_pending (struct multidictionary *mdict,
			       const struct pending *symbol_list);

/* A type containing data that is used when iterating over all symbols
   in a dictionary.  Don't ever look at its innards; this type would
   be opaque if we didn't need to be able to allocate it on the
   stack.  */

struct dict_iterator
{
  /* The dictionary that this iterator is associated to.  */
  const struct dictionary *dict;
  /* The next two members are data that is used in a way that depends
     on DICT's implementation type.  */
  int index;
  struct symbol *current;
};

/* The multi-language dictionary iterator.  Like dict_iterator above,
   these contents should be considered private.  */

struct mdict_iterator
{
  /* The multidictionary with whcih this iterator is associated.  */
  const struct multidictionary *mdict;

  /* The iterator used to iterate through individual dictionaries.  */
  struct dict_iterator iterator;

  /* The current index of the dictionary being iterated over.  */
  unsigned short current_idx;
};

/* Initialize ITERATOR to point at the first symbol in MDICT, and
   return that first symbol, or NULL if MDICT is empty.  */

extern struct symbol *
  mdict_iterator_first (const struct multidictionary *mdict,
			struct mdict_iterator *miterator);

/* Advance MITERATOR, and return the next symbol, or NULL if there are
   no more symbols.  Don't call this if you've previously received
   NULL from mdict_iterator_first or mdict_iterator_next on this
   iteration.  */

extern struct symbol *mdict_iterator_next (struct mdict_iterator *miterator);

/* Initialize MITERATOR to point at the first symbol in MDICT whose
   search_name () is NAME, as tested using COMPARE (which must use
   the same conventions as strcmp_iw and be compatible with any
   dictionary hashing function), and return that first symbol, or NULL
   if there are no such symbols.  */

extern struct symbol *
  mdict_iter_match_first (const struct multidictionary *mdict,
			  const lookup_name_info &name,
			  struct mdict_iterator *miterator);

/* Advance MITERATOR to point at the next symbol in MDICT whose
   search_name () is NAME, as tested using COMPARE (see
   dict_iter_match_first), or NULL if there are no more such symbols.
   Don't call this if you've previously received NULL from 
   mdict_iterator_match_first or mdict_iterator_match_next on this
   iteration.  And don't call it unless MITERATOR was created by a
   previous call to mdict_iter_match_first with the same NAME and COMPARE.  */

extern struct symbol *mdict_iter_match_next (const lookup_name_info &name,
					     struct mdict_iterator *miterator);

/* Return the number of symbols in multidictionary MDICT.  */

extern int mdict_size (const struct multidictionary *mdict);

/* An iterator that wraps an mdict_iterator.  The naming here is
   unfortunate, but mdict_iterator was named before gdb switched to
   C++.  */
struct mdict_iterator_wrapper
{
  typedef mdict_iterator_wrapper self_type;
  typedef struct symbol *value_type;

  explicit mdict_iterator_wrapper (const struct multidictionary *mdict)
    : m_sym (mdict_iterator_first (mdict, &m_iter))
  {
  }

  mdict_iterator_wrapper ()
    : m_sym (nullptr)
  {
  }

  value_type operator* () const
  {
    return m_sym;
  }

  bool operator== (const self_type &other) const
  {
    return m_sym == other.m_sym;
  }

  bool operator!= (const self_type &other) const
  {
    return m_sym != other.m_sym;
  }

  self_type &operator++ ()
  {
    m_sym = mdict_iterator_next (&m_iter);
    return *this;
  }

private:

  struct symbol *m_sym;
  struct mdict_iterator m_iter;
};

#endif /* DICTIONARY_H */