apple/StringRef: new library wrapping CFStringRef

1 files changed, 73 insertions, 0 deletions

diff --git a/src/apple/StringRef.hxx b/src/apple/StringRef.hxx
new file mode 100644
index 000000000..72afcd1a9
--- /dev/null
+++ b/src/apple/StringRef.hxx
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2020 Max Kellermann <max.kellermann@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef APPLE_STRING_REF_HXX
+#define APPLE_STRING_REF_HXX
+
+#include <CoreFoundation/CFString.h>
+
+#include <utility>
+
+namespace Apple {
+
+class StringRef {
+	CFStringRef ref = nullptr;
+
+public:
+	explicit StringRef(CFStringRef _ref) noexcept
+		:ref(_ref) {}
+
+	StringRef(StringRef &&src) noexcept
+		:ref(std::exchange(src.ref, nullptr)) {}
+
+	~StringRef() noexcept {
+		if (ref)
+			CFRelease(ref);
+	}
+
+	StringRef &operator=(StringRef &&src) noexcept {
+		using std::swap;
+		swap(ref, src.ref);
+		return *this;
+	}
+
+	operator bool() const noexcept {
+		return ref != nullptr;
+	}
+
+	bool GetCString(char *buffer, std::size_t size,
+			CFStringEncoding encoding=kCFStringEncodingUTF8) const noexcept
+	{
+		return CFStringGetCString(ref, buffer, size, encoding);
+	}
+};
+
+} // namespace Apple
+
+#endif