1/* Demangler component interface functions.
2   Copyright (C) 2004 Free Software Foundation, Inc.
3   Written by Ian Lance Taylor <ian@wasabisystems.com>.
4
5   This file is part of the libiberty library, which is part of GCC.
6
7   This file 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   In addition to the permissions in the GNU General Public License, the
13   Free Software Foundation gives you unlimited permission to link the
14   compiled version of this file into combinations with other programs,
15   and to distribute those combinations without any restriction coming
16   from the use of this file.  (The General Public License restrictions
17   do apply in other respects; for example, they cover modification of
18   the file, and distribution when not linked into a combined
19   executable.)
20
21   This program is distributed in the hope that it will be useful,
22   but WITHOUT ANY WARRANTY; without even the implied warranty of
23   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24   GNU General Public License for more details.
25
26   You should have received a copy of the GNU General Public License
27   along with this program; if not, write to the Free Software
28   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
29*/
30
31/* This file implements a few interface functions which are provided
32   for use with struct demangle_component trees.  These functions are
33   declared in demangle.h.  These functions are closely tied to the
34   demangler code in cp-demangle.c, and other interface functions can
35   be found in that file.  We put these functions in a separate file
36   because they are not needed by the demangler, and so we avoid
37   having them pulled in by programs which only need the
38   demangler.  */
39
40#ifdef HAVE_CONFIG_H
41#include "config.h"
42#endif
43
44#ifdef HAVE_STDLIB_H
45#include <stdlib.h>
46#endif
47#ifdef HAVE_STRING_H
48#include <string.h>
49#endif
50
51#include "ansidecl.h"
52#include "libiberty.h"
53#include "demangle.h"
54#include "cp-demangle.h"
55
56/* Fill in most component types.  */
57
58int
59cplus_demangle_fill_component (struct demangle_component *p,
60                               enum demangle_component_type type,
61                               struct demangle_component *left,
62                                struct demangle_component *right)
63{
64  if (p == NULL)
65    return 0;
66  switch (type)
67    {
68    case DEMANGLE_COMPONENT_QUAL_NAME:
69    case DEMANGLE_COMPONENT_LOCAL_NAME:
70    case DEMANGLE_COMPONENT_TYPED_NAME:
71    case DEMANGLE_COMPONENT_TEMPLATE:
72    case DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE:
73    case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL:
74    case DEMANGLE_COMPONENT_FUNCTION_TYPE:
75    case DEMANGLE_COMPONENT_ARRAY_TYPE:
76    case DEMANGLE_COMPONENT_PTRMEM_TYPE:
77    case DEMANGLE_COMPONENT_ARGLIST:
78    case DEMANGLE_COMPONENT_TEMPLATE_ARGLIST:
79    case DEMANGLE_COMPONENT_UNARY:
80    case DEMANGLE_COMPONENT_BINARY:
81    case DEMANGLE_COMPONENT_BINARY_ARGS:
82    case DEMANGLE_COMPONENT_TRINARY:
83    case DEMANGLE_COMPONENT_TRINARY_ARG1:
84    case DEMANGLE_COMPONENT_TRINARY_ARG2:
85    case DEMANGLE_COMPONENT_LITERAL:
86    case DEMANGLE_COMPONENT_LITERAL_NEG:
87      break;
88
89      /* These component types only have one subtree.  */
90    case DEMANGLE_COMPONENT_VTABLE:
91    case DEMANGLE_COMPONENT_VTT:
92    case DEMANGLE_COMPONENT_TYPEINFO:
93    case DEMANGLE_COMPONENT_TYPEINFO_NAME:
94    case DEMANGLE_COMPONENT_TYPEINFO_FN:
95    case DEMANGLE_COMPONENT_THUNK:
96    case DEMANGLE_COMPONENT_VIRTUAL_THUNK:
97    case DEMANGLE_COMPONENT_COVARIANT_THUNK:
98    case DEMANGLE_COMPONENT_JAVA_CLASS:
99    case DEMANGLE_COMPONENT_GUARD:
100    case DEMANGLE_COMPONENT_REFTEMP:
101    case DEMANGLE_COMPONENT_RESTRICT:
102    case DEMANGLE_COMPONENT_VOLATILE:
103    case DEMANGLE_COMPONENT_CONST:
104    case DEMANGLE_COMPONENT_RESTRICT_THIS:
105    case DEMANGLE_COMPONENT_VOLATILE_THIS:
106    case DEMANGLE_COMPONENT_CONST_THIS:
107    case DEMANGLE_COMPONENT_POINTER:
108    case DEMANGLE_COMPONENT_REFERENCE:
109    case DEMANGLE_COMPONENT_COMPLEX:
110    case DEMANGLE_COMPONENT_IMAGINARY:
111    case DEMANGLE_COMPONENT_VENDOR_TYPE:
112    case DEMANGLE_COMPONENT_CAST:
113      if (right != NULL)
114	return 0;
115      break;
116
117    default:
118      /* Other types do not use subtrees.  */
119      return 0;
120    }
121
122  p->type = type;
123  p->u.s_binary.left = left;
124  p->u.s_binary.right = right;
125
126  return 1;
127}
128
129/* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE.  */
130
131int
132cplus_demangle_fill_builtin_type (struct demangle_component *p,
133                                  const char *type_name)
134{
135  int len;
136  unsigned int i;
137
138  if (p == NULL || type_name == NULL)
139    return 0;
140  len = strlen (type_name);
141  for (i = 0; i < D_BUILTIN_TYPE_COUNT; ++i)
142    {
143      if (len == cplus_demangle_builtin_types[i].len
144	  && strcmp (type_name, cplus_demangle_builtin_types[i].name) == 0)
145	{
146	  p->type = DEMANGLE_COMPONENT_BUILTIN_TYPE;
147	  p->u.s_builtin.type = &cplus_demangle_builtin_types[i];
148	  return 1;
149	}
150    }
151  return 0;
152}
153
154/* Fill in a DEMANGLE_COMPONENT_OPERATOR.  */
155
156int
157cplus_demangle_fill_operator (struct demangle_component *p,
158                              const char *opname, int args)
159{
160  int len;
161  unsigned int i;
162
163  if (p == NULL || opname == NULL)
164    return 0;
165  len = strlen (opname);
166  for (i = 0; cplus_demangle_operators[i].name != NULL; ++i)
167    {
168      if (len == cplus_demangle_operators[i].len
169	  && args == cplus_demangle_operators[i].args
170	  && strcmp (opname, cplus_demangle_operators[i].name) == 0)
171	{
172	  p->type = DEMANGLE_COMPONENT_OPERATOR;
173	  p->u.s_operator.op = &cplus_demangle_operators[i];
174	  return 1;
175	}
176    }
177  return 0;
178}
179
180/* Translate a mangled name into components.  */
181
182struct demangle_component *
183cplus_demangle_v3_components (const char *mangled, int options, void **mem)
184{
185  size_t len;
186  int type;
187  struct d_info di;
188  struct demangle_component *dc;
189
190  len = strlen (mangled);
191
192  if (mangled[0] == '_' && mangled[1] == 'Z')
193    type = 0;
194  else
195    {
196      if ((options & DMGL_TYPES) == 0)
197	return NULL;
198      type = 1;
199    }
200
201  cplus_demangle_init_info (mangled, options, len, &di);
202
203  di.comps = ((struct demangle_component *)
204	      malloc (di.num_comps * sizeof (struct demangle_component)));
205  di.subs = ((struct demangle_component **)
206	     malloc (di.num_subs * sizeof (struct demangle_component *)));
207  if (di.comps == NULL || di.subs == NULL)
208    {
209      if (di.comps != NULL)
210	free (di.comps);
211      if (di.subs != NULL)
212	free (di.subs);
213      return NULL;
214    }
215
216  if (! type)
217    dc = cplus_demangle_mangled_name (&di, 1);
218  else
219    dc = cplus_demangle_type (&di);
220
221  /* If DMGL_PARAMS is set, then if we didn't consume the entire
222     mangled string, then we didn't successfully demangle it.  */
223  if ((options & DMGL_PARAMS) != 0 && d_peek_char (&di) != '\0')
224    dc = NULL;
225
226  free (di.subs);
227
228  if (dc != NULL)
229    *mem = di.comps;
230  else
231    free (di.comps);
232
233  return dc;
234}
235