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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [tree-iterator.h] - Rev 816
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/* Iterator routines for manipulating GENERIC and GIMPLE tree statements. Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. Contributed by Andrew MacLeod <amacleod@redhat.com> This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ /* This file is dependent upon the implementation of tree's. It provides an abstract interface to the tree objects such that if all tree creation and manipulations are done through this interface, we can easily change the implementation of tree's, and not impact other code. */ #ifndef GCC_TREE_ITERATOR_H #define GCC_TREE_ITERATOR_H 1 /* Iterator object for GENERIC or GIMPLE TREE statements. */ typedef struct { struct tree_statement_list_node *ptr; tree container; } tree_stmt_iterator; static inline tree_stmt_iterator tsi_start (tree t) { tree_stmt_iterator i; i.ptr = STATEMENT_LIST_HEAD (t); i.container = t; return i; } static inline tree_stmt_iterator tsi_last (tree t) { tree_stmt_iterator i; i.ptr = STATEMENT_LIST_TAIL (t); i.container = t; return i; } static inline bool tsi_end_p (tree_stmt_iterator i) { return i.ptr == NULL; } static inline bool tsi_one_before_end_p (tree_stmt_iterator i) { return i.ptr != NULL && i.ptr->next == NULL; } static inline void tsi_next (tree_stmt_iterator *i) { i->ptr = i->ptr->next; } static inline void tsi_prev (tree_stmt_iterator *i) { i->ptr = i->ptr->prev; } static inline tree * tsi_stmt_ptr (tree_stmt_iterator i) { return &i.ptr->stmt; } static inline tree tsi_stmt (tree_stmt_iterator i) { return i.ptr->stmt; } enum tsi_iterator_update { TSI_NEW_STMT, /* Only valid when single statement is added, move iterator to it. */ TSI_SAME_STMT, /* Leave the iterator at the same statement. */ TSI_CHAIN_START, /* Only valid when chain of statements is added, move iterator to the first statement in the chain. */ TSI_CHAIN_END, /* Only valid when chain of statements is added, move iterator to the last statement in the chain. */ TSI_CONTINUE_LINKING /* Move iterator to whatever position is suitable for linking other statements/chains of statements in the same direction. */ }; extern void tsi_link_before (tree_stmt_iterator *, tree, enum tsi_iterator_update); extern void tsi_link_after (tree_stmt_iterator *, tree, enum tsi_iterator_update); void tsi_delink (tree_stmt_iterator *); tree tsi_split_statement_list_after (const tree_stmt_iterator *); tree tsi_split_statement_list_before (tree_stmt_iterator *); void append_to_statement_list (tree, tree *); void append_to_statement_list_force (tree, tree *); #endif /* GCC_TREE_ITERATOR_H */