Initial commit

engines/bagel/boflib/string_functions.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/str.h"
+
+#include "bagel/boflib/string_functions.h"
+
+namespace Bagel {
+
+int strCharCount(const char *str, char c) {
+	assert(str != nullptr);
+
+	int n = 0;
+	while (*str != '\0') {
+		if (*str++ == c)
+			n++;
+	}
+
+	return n;
+}
+
+char *strreplaceChar(char *str, char cOld, char cNew) {
+	char *p = str;
+
+	// Can't access a nullptr pointer
+	assert(str != nullptr);
+
+	// If cOld was '\0' then this function would do nothing
+	assert(cOld != '\0');
+
+	while (*p != '\0') {
+		if (*p == cOld) {
+			*p = cNew;
+		}
+		p++;
+	}
+
+	return str;
+}
+
+char *strreplaceStr(char *pszBuf, const char *pszTok, const char *pszNewTok) {
+	// Can't access nullptr pointers
+	assert(pszBuf != nullptr);
+	assert(pszTok != nullptr);
+	assert(pszNewTok != nullptr);
+
+	// Search token, and new token can't be the same
+	assert(strcmp(pszTok, pszNewTok) != 0);
+
+	int nTok = strlen(pszTok);
+	int nNewTok = strlen(pszNewTok);
+	int nDiff = nTok - nNewTok;
+
+	char *p = pszBuf;
+	for (char *pszSearch = strstr(p, pszTok); pszSearch; pszSearch = strstr(p, pszTok)) {
+		char *pszEndTok = pszSearch + nTok;
+
+		if (nDiff != 0) {
+			memmove(pszEndTok - nDiff, pszEndTok, strlen(pszEndTok) + 1);
+		}
+		memcpy(pszSearch, pszNewTok, nNewTok);
+	}
+
+	return pszBuf;
+}
+
+void memreplaceChar(byte *pBuf, byte chOld, byte chNew, int32 lSize) {
+	assert(pBuf != nullptr);
+	assert(chOld != chNew);
+
+	while (lSize-- > 0) {
+
+		if (*pBuf == chOld) {
+			*pBuf = chNew;
+		}
+		pBuf++;
+	}
+}
+
+} // namespace Bagel