1 /* Internal demangler interface for g++ V3 ABI.
2 Copyright (C) 2003-2021 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 provides some definitions shared by cp-demangle.c and
32 cp-demint.c. It should not be included by any other files. */
33
34 /* Information we keep for operators. */
35
36 struct demangle_operator_info
37 {
38 /* Mangled name. */
39 const char *code;
40 /* Real name. */
41 const char *name;
42 /* Length of real name. */
43 int len;
44 /* Number of arguments. */
45 int args;
46 };
47
48 /* How to print the value of a builtin type. */
49
50 enum d_builtin_type_print
51 {
52 /* Print as (type)val. */
53 D_PRINT_DEFAULT,
54 /* Print as integer. */
55 D_PRINT_INT,
56 /* Print as unsigned integer, with trailing "u". */
57 D_PRINT_UNSIGNED,
58 /* Print as long, with trailing "l". */
59 D_PRINT_LONG,
60 /* Print as unsigned long, with trailing "ul". */
61 D_PRINT_UNSIGNED_LONG,
62 /* Print as long long, with trailing "ll". */
63 D_PRINT_LONG_LONG,
64 /* Print as unsigned long long, with trailing "ull". */
65 D_PRINT_UNSIGNED_LONG_LONG,
66 /* Print as bool. */
67 D_PRINT_BOOL,
68 /* Print as float--put value in square brackets. */
69 D_PRINT_FLOAT,
70 /* Print in usual way, but here to detect void. */
71 D_PRINT_VOID
72 };
73
74 /* Information we keep for a builtin type. */
75
76 struct demangle_builtin_type_info
77 {
78 /* Type name. */
79 const char *name;
80 /* Length of type name. */
81 int len;
82 /* Type name when using Java. */
83 const char *java_name;
84 /* Length of java name. */
85 int java_len;
86 /* How to print a value of this type. */
87 enum d_builtin_type_print print;
88 };
89
90 /* The information structure we pass around. */
91
92 struct d_info
93 {
94 /* The string we are demangling. */
95 const char *s;
96 /* The end of the string we are demangling. */
97 const char *send;
98 /* The options passed to the demangler. */
99 int options;
100 /* The next character in the string to consider. */
101 const char *n;
102 /* The array of components. */
103 struct demangle_component *comps;
104 /* The index of the next available component. */
105 int next_comp;
106 /* The number of available component structures. */
107 int num_comps;
108 /* The array of substitutions. */
109 struct demangle_component **subs;
110 /* The index of the next substitution. */
111 int next_sub;
112 /* The number of available entries in the subs array. */
113 int num_subs;
114 /* The last name we saw, for constructors and destructors. */
115 struct demangle_component *last_name;
116 /* A running total of the length of large expansions from the
117 mangled name to the demangled name, such as standard
118 substitutions and builtin types. */
119 int expansion;
120 /* Non-zero if we are parsing an expression. */
121 int is_expression;
122 /* Non-zero if we are parsing the type operand of a conversion
123 operator, but not when in an expression. */
124 int is_conversion;
125 /* 1: using new unresolved-name grammar.
126 -1: using new unresolved-name grammar and saw an unresolved-name.
127 0: using old unresolved-name grammar. */
128 int unresolved_name_state;
129 /* If DMGL_NO_RECURSE_LIMIT is not active then this is set to
130 the current recursion level. */
131 unsigned int recursion_level;
132 };
133
134 /* To avoid running past the ending '\0', don't:
135 - call d_peek_next_char if d_peek_char returned '\0'
136 - call d_advance with an 'i' that is too large
137 - call d_check_char(di, '\0')
138 Everything else is safe. */
139 #define d_peek_char(di) (*((di)->n))
140 #ifndef CHECK_DEMANGLER
141 # define d_peek_next_char(di) ((di)->n[1])
142 # define d_advance(di, i) ((di)->n += (i))
143 #endif
144 #define d_check_char(di, c) (d_peek_char(di) == c ? ((di)->n++, 1) : 0)
145 #define d_next_char(di) (d_peek_char(di) == '\0' ? '\0' : *((di)->n++))
146 #define d_str(di) ((di)->n)
147
148 #ifdef CHECK_DEMANGLER
149 static inline char
d_peek_next_char(const struct d_info * di)150 d_peek_next_char (const struct d_info *di)
151 {
152 if (!di->n[0])
153 abort ();
154 return di->n[1];
155 }
156
157 static inline void
d_advance(struct d_info * di,int i)158 d_advance (struct d_info *di, int i)
159 {
160 if (i < 0)
161 abort ();
162 while (i--)
163 {
164 if (!di->n[0])
165 abort ();
166 di->n++;
167 }
168 }
169 #endif
170
171 /* Functions and arrays in cp-demangle.c which are referenced by
172 functions in cp-demint.c. */
173 #ifdef IN_GLIBCPP_V3
174 #define CP_STATIC_IF_GLIBCPP_V3 static
175 #else
176 #define CP_STATIC_IF_GLIBCPP_V3 extern
177 #endif
178
179 #ifndef IN_GLIBCPP_V3
180 extern const struct demangle_operator_info cplus_demangle_operators[];
181 #endif
182
183 #define D_BUILTIN_TYPE_COUNT (34)
184
185 CP_STATIC_IF_GLIBCPP_V3
186 const struct demangle_builtin_type_info
187 cplus_demangle_builtin_types[D_BUILTIN_TYPE_COUNT];
188
189 CP_STATIC_IF_GLIBCPP_V3
190 struct demangle_component *
191 cplus_demangle_mangled_name (struct d_info *, int);
192
193 CP_STATIC_IF_GLIBCPP_V3
194 struct demangle_component *
195 cplus_demangle_type (struct d_info *);
196
197 extern void
198 cplus_demangle_init_info (const char *, int, size_t, struct d_info *);
199
200 /* cp-demangle.c needs to define this a little differently */
201 #undef CP_STATIC_IF_GLIBCPP_V3
202