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/tmp/gdb-8.1/gdb/namespace.c
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1 /* Code dealing with "using" directives for GDB.
2 Copyright (C) 2003-2018 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19 #include "defs.h"
20 #include "namespace.h"
21
22 /* Add a using directive to USING_DIRECTIVES. If the using directive
23 in question has already been added, don't add it twice.
24
25 Create a new struct using_direct which imports the namespace SRC
26 into the scope DEST. ALIAS is the name of the imported namespace
27 in the current scope. If ALIAS is NULL then the namespace is known
28 by its original name. DECLARATION is the name if the imported
29 varable if this is a declaration import (Eg. using A::x), otherwise
30 it is NULL. EXCLUDES is a list of names not to import from an
31 imported module or NULL. If COPY_NAMES is non-zero, then the
32 arguments are copied into newly allocated memory so they can be
33 temporaries. For EXCLUDES the VEC pointers are copied but the
34 pointed to characters are not copied. */
35
36 void
37 add_using_directive (struct using_direct **using_directives,
38 const char *dest,
39 const char *src,
40 const char *alias,
41 const char *declaration,
42 const std::vector<const char *> &excludes,
43 int copy_names,
44 struct obstack *obstack)
45 {
46 struct using_direct *current;
47 struct using_direct *newobj;
48 int alloc_len;
49
50 /* Has it already been added? */
51
52 for (current = *using_directives; current != NULL; current = current->next)
53 {
54 int ix;
55
56 if (strcmp (current->import_src, src) != 0)
57 continue;
58 if (strcmp (current->import_dest, dest) != 0)
59 continue;
60 if ((alias == NULL && current->alias != NULL)
61 || (alias != NULL && current->alias == NULL)
62 || (alias != NULL && current->alias != NULL
63 && strcmp (alias, current->alias) != 0))
64 continue;
65 if ((declaration == NULL && current->declaration != NULL)
66 || (declaration != NULL && current->declaration == NULL)
67 || (declaration != NULL && current->declaration != NULL
68 && strcmp (declaration, current->declaration) != 0))
69 continue;
70
71 /* Compare the contents of EXCLUDES. */
72 for (ix = 0; ix < excludes.size (); ++ix)
73 if (current->excludes[ix] == NULL
74 || strcmp (excludes[ix], current->excludes[ix]) != 0)
75 break;
76 if (ix < excludes.size () || current->excludes[ix] != NULL)
77 continue;
78
79 /* Parameters exactly match CURRENT. */
80 return;
81 }
82
83 alloc_len = (sizeof(*newobj)
84 + (excludes.size () * sizeof(*newobj->excludes)));
85 newobj = (struct using_direct *) obstack_alloc (obstack, alloc_len);
86 memset (newobj, 0, sizeof (*newobj));
87
88 if (copy_names)
89 {
90 newobj->import_src
91 = (const char *) obstack_copy0 (obstack, src, strlen (src));
92 newobj->import_dest
93 = (const char *) obstack_copy0 (obstack, dest, strlen (dest));
94 }
95 else
96 {
97 newobj->import_src = src;
98 newobj->import_dest = dest;
99 }
100
101 if (alias != NULL && copy_names)
102 newobj->alias
103 = (const char *) obstack_copy0 (obstack, alias, strlen (alias));
104 else
105 newobj->alias = alias;
106
107 if (declaration != NULL && copy_names)
108 newobj->declaration
109 = (const char *) obstack_copy0 (obstack, declaration,
110 strlen (declaration));
111 else
112 newobj->declaration = declaration;
113
114 memcpy (newobj->excludes, excludes.data (),
115 excludes.size () * sizeof (*newobj->excludes));
116 newobj->excludes[excludes.size ()] = NULL;
117
118 newobj->next = *using_directives;
119 *using_directives = newobj;
120 }
using_direct::import_dest
const char * import_dest
Definition: namespace.h:93
using_direct::alias
const char * alias
Definition: namespace.h:95
using_direct::import_src
const char * import_src
Definition: namespace.h:92
alias
const char * alias
Definition: nds32-tdep.c:114
memset
void * memset(T *s, int c, size_t n)=delete
defs.h
using_direct::excludes
const char * excludes[1]
Definition: namespace.h:106
namespace.h
using_direct
Definition: namespace.h:90
using_direct::next
struct using_direct * next
Definition: namespace.h:98
add_using_directive
void add_using_directive(struct using_direct **using_directives, const char *dest, const char *src, const char *alias, const char *declaration, const std::vector< const char *> &excludes, int copy_names, struct obstack *obstack)
Definition: namespace.c:37
using_directives
static struct using_direct ** using_directives(enum language)
Definition: dwarf2read.c:11233
using_direct::declaration
const char * declaration
Definition: namespace.h:96