stringUtils.cpp revision 6872:16286b7d7c6e 
1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "utilities/stringUtils.hpp"
27
28int StringUtils::replace_no_expand(char* string, const char* from, const char* to) {
29  int replace_count = 0;
30  size_t from_len = strlen(from);
31  size_t to_len = strlen(to);
32  assert(from_len >= to_len, "must not expand input");
33
34  for (char* dst = string; *dst && (dst = strstr(dst, from)) != NULL;) {
35    char* left_over = dst + from_len;
36    memmove(dst, to, to_len);                       // does not copy trailing 0 of <to>
37    dst += to_len;                                  // skip over the replacement.
38    memmove(dst, left_over, strlen(left_over) + 1); // copies the trailing 0 of <left_over>
39    ++ replace_count;
40  }
41
42  return replace_count;
43}
44