COMMON: Add replace(String, String, String)

Searches for a substring in the string and replaces it with the other
string.

2 files changed, 18 insertions, 0 deletions

diff --git a/common/str.cpp b/common/str.cpp
index 326b4a80d1..90bd539790 100644
--- a/common/str.cpp
+++ b/common/str.cpp
@@ -838,6 +838,15 @@ bool matchString(const char *str, const char *pat, bool ignoreCase, bool pathMod
 	}
 }
 
+void replace(Common::String &source, const Common::String &what, const Common::String &with) {
+	const char *cstr = source.c_str();
+	const char *position = strstr(cstr, what.c_str());
+	if (position) {
+		uint32 index = position - cstr;
+		source.replace(index, what.size(), with);
+	}
+}
+
 String tag2string(uint32 tag) {
 	char str[5];
 	str[0] = (char)(tag >> 24);
diff --git a/common/str.h b/common/str.h
index 89b832d57e..1293d89508 100644
--- a/common/str.h
+++ b/common/str.h
@@ -390,6 +390,15 @@ String normalizePath(const String &path, const char sep);
  */
 bool matchString(const char *str, const char *pat, bool ignoreCase = false, bool pathMode = false);
 
+/**
+ * Function which replaces substring with the other. It happens in place.
+ * If there is no substring found, original string is not changed.
+ *
+ * @param source String to search and replace substring in.
+ * @param what Substring to replace.
+ * @param with String to replace with.
+ */
+void replace(Common::String &source, const Common::String &what, const Common::String &with);
 
 /**
  * Take a 32 bit value and turn it into a four character string, where each of