Factor out and expose prefixed name predicates

Towards using these in the writer to escape names more precisely.

1 files changed, 36 insertions, 0 deletions

diff --git a/src/ntriples.h b/src/ntriples.h
new file mode 100644
index 00000000..566a8ddc
--- /dev/null
+++ b/src/ntriples.h
@@ -0,0 +1,36 @@
+/*
+  Copyright 2011-2021 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef SERD_NTRIPLES_H
+#define SERD_NTRIPLES_H
+
+#include "string_utils.h"
+
+#include <stdbool.h>
+
+static inline bool
+is_PN_CHARS_BASE(const int c)
+{
+  return (is_alpha(c) || in_range(c, 0x000C0u, 0x000D6u) ||
+          in_range(c, 0x000D8u, 0x000F6u) || in_range(c, 0x000F8u, 0x002FFu) ||
+          in_range(c, 0x00370u, 0x0037Du) || in_range(c, 0x0037Fu, 0x01FFFu) ||
+          in_range(c, 0x0200Cu, 0x0200Du) || in_range(c, 0x02070u, 0x0218Fu) ||
+          in_range(c, 0x02C00u, 0x02FEFu) || in_range(c, 0x03001u, 0x0D7FFu) ||
+          in_range(c, 0x0F900u, 0x0FDCFu) || in_range(c, 0x0FDF0u, 0x0FFFDu) ||
+          in_range(c, 0x10000u, 0xEFFFFu));
+}
+
+#endif // SERD_NTRIPLES_H