init

scripts/generate_unicode_tolower.py

@@ -0,0 +1,57 @@
+# Needs UnicodeData.txt in the current directory.
+#
+# It can be obtained from unicode.org:
+# - http://www.unicode.org/Public/<VERSION>/ucd/UnicodeData.txt
+#
+# If executed as a script, it will generate the contents of the file
+# python3 scripts/generate_unicode_tolower.py header > `src/base/unicode/tolower.h`,
+# python3 scripts/generate_unicode_tolower.py data > `src/base/unicode/tolower_data.h`.
+
+import sys
+import unicode
+
+def generate_cases():
+	ud = unicode.data()
+	return [(unicode.unhex(u["Value"]), unicode.unhex(u["Simple_Lowercase_Mapping"])) for u in ud if u["Simple_Lowercase_Mapping"]]
+
+def gen_header(cases):
+	print(f"""\
+#include <cstdint>
+
+struct UPPER_LOWER
+{{
+\tint32_t upper;
+\tint32_t lower;
+}};
+
+enum
+{{
+\tNUM_TOLOWER = {len(cases)},
+}};
+
+extern const struct UPPER_LOWER tolowermap[];""")
+
+def gen_data(cases):
+	print("""\
+#ifndef TOLOWER_DATA
+#error "This file must only be included in `tolower.cpp`"
+#endif
+
+const struct UPPER_LOWER tolowermap[] = {""")
+	for upper_code, lower_code in cases:
+		print(f"\t{{{upper_code}, {lower_code}}},")
+	print("};")
+
+def main():
+	cases = generate_cases()
+
+	header = "header" in sys.argv
+	data = "data" in sys.argv
+
+	if header:
+		gen_header(cases)
+	elif data:
+		gen_data(cases)
+
+if __name__ == '__main__':
+	main()