Add CString::StartsWith and CString::EndsWith

include/znc/ZNCString.h

@@ -478,6 +478,17 @@ class CString : public std::string {
 	 */
 	CString TrimSuffix_n(const CString& sSuffix) const;
 
+	/** Check whether the string starts with a given prefix.
+	 * @param sPrefix The prefix.
+	 * @return True if the string starts with prefix, false otherwise.
+	 */
+	bool StartsWith(const CString& sPrefix) const;
+	/** Check whether the string ends with a given suffix.
+	 * @param sSuffix The suffix.
+	 * @return True if the string ends with suffix, false otherwise.
+	 */
+	bool EndsWith(const CString& sSuffix) const;
+
 	/** Remove characters from the beginning of this string.
 	 * @param uLen The number of characters to remove.
 	 * @return true if this string was modified.

src/ZNCString.cpp

@@ -1092,6 +1092,14 @@ bool CString::TrimSuffix(const CString& sSuffix) {
 	}
 }
 
+bool CString::StartsWith(const CString& sPrefix) const {
+	return Left(sPrefix.length()).Equals(sPrefix);
+}
+
+bool CString::EndsWith(const CString& sSuffix) const {
+	return Right(sSuffix.length()).Equals(sSuffix);
+}
+
 
 CString CString::TrimPrefix_n(const CString& sPrefix) const {
 	CString sRet = *this;