iklam@7089: /*
iklam@7089:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
iklam@7089:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
iklam@7089:  *
iklam@7089:  * This code is free software; you can redistribute it and/or modify it
iklam@7089:  * under the terms of the GNU General Public License version 2 only, as
iklam@7089:  * published by the Free Software Foundation.
iklam@7089:  *
iklam@7089:  * This code is distributed in the hope that it will be useful, but WITHOUT
iklam@7089:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
iklam@7089:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
iklam@7089:  * version 2 for more details (a copy is included in the LICENSE file that
iklam@7089:  * accompanied this code).
iklam@7089:  *
iklam@7089:  * You should have received a copy of the GNU General Public License version
iklam@7089:  * 2 along with this work; if not, write to the Free Software Foundation,
iklam@7089:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
iklam@7089:  *
iklam@7089:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
iklam@7089:  * or visit www.oracle.com if you need additional information or have any
iklam@7089:  * questions.
iklam@7089:  *
iklam@7089:  */
iklam@7089: 
iklam@7089: #include "precompiled.hpp"
iklam@7089: #include "utilities/stringUtils.hpp"
iklam@7089: 
iklam@7089: int StringUtils::replace_no_expand(char* string, const char* from, const char* to) {
iklam@7089:   int replace_count = 0;
iklam@7089:   size_t from_len = strlen(from);
iklam@7089:   size_t to_len = strlen(to);
iklam@7089:   assert(from_len >= to_len, "must not expand input");
iklam@7089: 
iklam@7089:   for (char* dst = string; *dst && (dst = strstr(dst, from)) != NULL;) {
iklam@7089:     char* left_over = dst + from_len;
iklam@7089:     memmove(dst, to, to_len);                       // does not copy trailing 0 of <to>
iklam@7089:     dst += to_len;                                  // skip over the replacement.
iklam@7089:     memmove(dst, left_over, strlen(left_over) + 1); // copies the trailing 0 of <left_over>
iklam@7089:     ++ replace_count;
iklam@7089:   }
iklam@7089: 
iklam@7089:   return replace_count;
iklam@7089: }