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 
58 int
59 cplus_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 
131 int
132 cplus_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 
156 int
157 cplus_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 
182 struct demangle_component *
183 cplus_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