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20375
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "utilities/stringUtils.hpp"
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27
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28 int StringUtils::replace_no_expand(char* string, const char* from, const char* to) {
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29 int replace_count = 0;
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30 size_t from_len = strlen(from);
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31 size_t to_len = strlen(to);
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32 assert(from_len >= to_len, "must not expand input");
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33
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34 for (char* dst = string; *dst && (dst = strstr(dst, from)) != NULL;) {
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35 char* left_over = dst + from_len;
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36 memmove(dst, to, to_len); // does not copy trailing 0 of <to>
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37 dst += to_len; // skip over the replacement.
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38 memmove(dst, left_over, strlen(left_over) + 1); // copies the trailing 0 of <left_over>
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39 ++ replace_count;
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40 }
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41
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42 return replace_count;
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43 }
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