util/UriUtil: add uri_get_suffix() overload that ignores query string

src/util/UriUtil.cxx

@@ -44,6 +44,23 @@ uri_get_suffix(const char *uri)
 	return suffix;
 }
 
+const char *
+uri_get_suffix(const char *uri, UriSuffixBuffer &buffer)
+{
+	const char *suffix = uri_get_suffix(uri);
+	if (suffix == nullptr)
+		return nullptr;
+
+	const char *q = strchr(suffix, '?');
+	if (q != nullptr && size_t(q - suffix) < sizeof(buffer.data)) {
+		memcpy(buffer.data, suffix, q - suffix);
+		buffer.data[q - suffix] = 0;
+		suffix = buffer.data;
+	}
+
+	return suffix;
+}
+
 static const char *
 verify_uri_segment(const char *p)
 {

src/util/UriUtil.hxx

@@ -35,6 +35,17 @@ gcc_pure
 const char *
 uri_get_suffix(const char *uri);
 
+struct UriSuffixBuffer {
+	char data[8];
+};
+
+/**
+ * Returns the file name suffix, ignoring the query string.
+ */
+gcc_pure
+const char *
+uri_get_suffix(const char *uri, UriSuffixBuffer &buffer);
+
 /**
  * Returns true if this is a safe "local" URI:
  *