1 files changed, 32 insertions, 0 deletions
diff --git a/format/fastxml/chars.ha b/format/fastxml/chars.ha
new file mode 100644
index 0000000..2a2cc90
--- /dev/null
+++ b/format/fastxml/chars.ha
@@ -0,0 +1,32 @@
+// License: MPL-2.0
+// (c) 2021 Drew DeVault <sir@cmpwn.com>
+use ascii;
+
+fn isnamestart(rn: rune) bool = {
+	if (rn == ':' || rn == '_' || ascii::isalpha(rn)) return true;
+	let rn = rn: u32;
+	return
+		(rn >= 0xC0 && rn <= 0xD6) ||
+		(rn >= 0xD8 && rn <= 0xF6) ||
+		(rn >= 0xF8 && rn <= 0x2FF) ||
+		(rn >= 0x370 && rn <= 0x37D) ||
+		(rn >= 0x37F && rn <= 0x1FFF) ||
+		(rn >= 0x200C && rn <= 0x200D) ||
+		(rn >= 0x2070 && rn <= 0x218F) ||
+		(rn >= 0x2C00 && rn <= 0x2FEF) ||
+		(rn >= 0x3001 && rn <= 0xD7FF) ||
+		(rn >= 0xF900 && rn <= 0xFDCF) ||
+		(rn >= 0xFDF0 && rn <= 0xFFFD) ||
+		(rn >= 0x10000 && rn <= 0xEFFFF);
+};
+
+fn isname(rn: rune) bool = {
+	if (isnamestart(rn) || rn == '-' || rn == '.' || ascii::isdigit(rn)) {
+		return true;
+	};
+	let rn = rn: u32;
+	return
+		(rn == 0xB7) ||
+		(rn >= 0x300 && rn <= 0x36F) ||
+		(rn >= 0x203F && rn <= 0x2040);
+};