| 1 | /* Code dealing with "using" directives for GDB. |
| 2 | Copyright (C) 2003-2017 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 | VEC (const_char_ptr) *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 | const char *param; |
| 56 | |
| 57 | if (strcmp (current->import_src, src) != 0) |
| 58 | continue; |
| 59 | if (strcmp (current->import_dest, dest) != 0) |
| 60 | continue; |
| 61 | if ((alias == NULL && current->alias != NULL) |
| 62 | || (alias != NULL && current->alias == NULL) |
| 63 | || (alias != NULL && current->alias != NULL |
| 64 | && strcmp (alias, current->alias) != 0)) |
| 65 | continue; |
| 66 | if ((declaration == NULL && current->declaration != NULL) |
| 67 | || (declaration != NULL && current->declaration == NULL) |
| 68 | || (declaration != NULL && current->declaration != NULL |
| 69 | && strcmp (declaration, current->declaration) != 0)) |
| 70 | continue; |
| 71 | |
| 72 | /* Compare the contents of EXCLUDES. */ |
| 73 | for (ix = 0; VEC_iterate (const_char_ptr, excludes, ix, param); ix++) |
| 74 | if (current->excludes[ix] == NULL |
| 75 | || strcmp (param, current->excludes[ix]) != 0) |
| 76 | break; |
| 77 | if (ix < VEC_length (const_char_ptr, excludes) |
| 78 | || current->excludes[ix] != NULL) |
| 79 | continue; |
| 80 | |
| 81 | /* Parameters exactly match CURRENT. */ |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | alloc_len = (sizeof(*newobj) |
| 86 | + (VEC_length (const_char_ptr, excludes) |
| 87 | * sizeof(*newobj->excludes))); |
| 88 | newobj = (struct using_direct *) obstack_alloc (obstack, alloc_len); |
| 89 | memset (newobj, 0, sizeof (*newobj)); |
| 90 | |
| 91 | if (copy_names) |
| 92 | { |
| 93 | newobj->import_src |
| 94 | = (const char *) obstack_copy0 (obstack, src, strlen (src)); |
| 95 | newobj->import_dest |
| 96 | = (const char *) obstack_copy0 (obstack, dest, strlen (dest)); |
| 97 | } |
| 98 | else |
| 99 | { |
| 100 | newobj->import_src = src; |
| 101 | newobj->import_dest = dest; |
| 102 | } |
| 103 | |
| 104 | if (alias != NULL && copy_names) |
| 105 | newobj->alias |
| 106 | = (const char *) obstack_copy0 (obstack, alias, strlen (alias)); |
| 107 | else |
| 108 | newobj->alias = alias; |
| 109 | |
| 110 | if (declaration != NULL && copy_names) |
| 111 | newobj->declaration |
| 112 | = (const char *) obstack_copy0 (obstack, declaration, |
| 113 | strlen (declaration)); |
| 114 | else |
| 115 | newobj->declaration = declaration; |
| 116 | |
| 117 | memcpy (newobj->excludes, VEC_address (const_char_ptr, excludes), |
| 118 | VEC_length (const_char_ptr, excludes) * sizeof (*newobj->excludes)); |
| 119 | newobj->excludes[VEC_length (const_char_ptr, excludes)] = NULL; |
| 120 | |
| 121 | newobj->next = *using_directives; |
| 122 | *using_directives = newobj; |
| 123 | } |