1 files changed, 41 insertions, 0 deletions
diff --git a/regexp/parse-unidata.awk b/regexp/parse-unidata.awk
new file mode 100644
index 000000000..c293c7ecf
--- /dev/null
+++ b/regexp/parse-unidata.awk
@@ -0,0 +1,41 @@
+# Parse the unicode data from:
+#   https://unicode.org/Public/UNIDATA/UnicodeData.txt
+# to generate case mapping table
+
+BEGIN {
+    print("/* Generated from UnicodeData.txt */")
+    print("")
+    print("static const struct casemap unicode_case_mapping_upper[] = {")
+    FS = ";"
+    count = 0
+}
+
+{
+    code = strtonum(("0x" $1))
+    name = $2
+    class = $3
+    upper = $13
+    lower = $14
+    title = $15
+
+    if (code <= 0x7f) {
+	next
+    }
+    if (code > 0xffff) {
+	next
+    }
+    if ($3 !~ /^L.*/) {
+	next
+    }
+    if (upper != "") {
+	printf("\t{ 0x" tolower($1) ", 0x" tolower(upper) " },")
+	count++
+	if ((count % 4) == 0) {
+	    print("")
+	}
+    }
+}
+
+END {
+    print("\n};")
+}