1 files changed, 51 insertions, 0 deletions
diff --git a/src/extract-uri.h b/src/extract-uri.h
new file mode 100644
index 0000000..ee773f4
--- /dev/null
+++ b/src/extract-uri.h
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#ifndef SEEN_EXTRACT_URI_H
+#define SEEN_EXTRACT_URI_H
+
+#include <string>
+
+/**
+ * Parse functional URI notation, as per 4.3.4 of CSS 2.1
+ *
+ * http://www.w3.org/TR/CSS21/syndata.html#uri
+ *
+ * > The format of a URI value is 'url(' followed by optional white space
+ * > followed by an optional single quote (') or double quote (") character
+ * > followed by the URI itself, followed by an optional single quote (')
+ * > or double quote (") character followed by optional white space
+ * > followed by ')'. The two quote characters must be the same.
+ *
+ * Example:
+ * \verbatim
+   url = extract_uri("url('foo')bar", &out);
+   -> url == "foo"
+   -> out == "bar"
+   \endverbatim
+ *
+ * @param s String which starts with "url("
+ * @param[out] endptr points to \c s + N, where N is the number of characters parsed
+ * @return URL string, or empty string on failure
+ */
+std::string extract_uri(char const *s, char const **endptr = nullptr);
+
+
+#endif /* !SEEN_EXTRACT_URI_H */
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :