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Sometimes it's useful to lookup a string without terminating it with a zero. We can do that relying on ebmb_lookup() since the string in the tree contains a zero.
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/*
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* Elastic Binary Trees - exported functions for String data nodes.
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* Version 5.1
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* (C) 2002-2009 - Willy Tarreau <w@1wt.eu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* Consult ebsttree.h for more details about those functions */
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#include "ebsttree.h"
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/* Find the first occurence of a zero-terminated string <x> in the tree <root>.
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* It's the caller's reponsibility to use this function only on trees which
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* only contain zero-terminated strings. If none can be found, return NULL.
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*/
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REGPRM2 struct ebmb_node *ebst_lookup(struct eb_root *root, const char *x)
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{
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return __ebst_lookup(root, x);
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}
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/* Find the first occurence of a length <len> string <x> in the tree <root>.
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* It's the caller's reponsibility to use this function only on trees which
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* only contain zero-terminated strings, and that no null character is present
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* in string <x> in the first <len> chars. If none can be found, return NULL.
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*/
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REGPRM3 struct ebmb_node *ebst_lookup_len(struct eb_root *root, const char *x, unsigned int len)
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{
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struct ebmb_node *node;
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node = ebmb_lookup(root, x, len);
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if (!node || node->key[len] != 0)
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return NULL;
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return node;
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}
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/* Insert ebmb_node <new> into subtree starting at node root <root>. Only
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* new->key needs be set with the zero-terminated string key. The ebmb_node is
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* returned. If root->b[EB_RGHT]==1, the tree may only contain unique keys. The
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* caller is responsible for properly terminating the key with a zero.
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*/
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REGPRM2 struct ebmb_node *ebst_insert(struct eb_root *root, struct ebmb_node *new)
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{
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return __ebst_insert(root, new);
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}
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