Fix running the tests with -fsanitize=address.

src/case.c

@@ -1,6 +1,6 @@
 /* Unicode Case Conversion
  *
- * Copyright (C) 2012-2018 Reece H. Dunn
+ * Copyright (C) 2012-2018, 2021 Reece H. Dunn
  *
  * This file is part of ucd-tools.
  *
@@ -2822,7 +2822,7 @@ static const struct case_conversion_entry case_conversion_data[] =
 codepoint_t ucd_toupper(codepoint_t c)
 {
 	int begin = 0;
-	int end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]);
+	int end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]) - 1;
 	while (begin <= end)
 	{
 		int pos = (begin + end) / 2;
@@ -2840,7 +2840,7 @@ codepoint_t ucd_toupper(codepoint_t c)
 codepoint_t ucd_tolower(codepoint_t c)
 {
 	int begin = 0;
-	int end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]);
+	int end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]) - 1;
 	while (begin <= end)
 	{
 		int pos = (begin + end) / 2;
@@ -2858,7 +2858,7 @@ codepoint_t ucd_tolower(codepoint_t c)
 codepoint_t ucd_totitle(codepoint_t c)
 {
 	int begin = 0;
-	int end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]);
+	int end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]) - 1;
 	while (begin <= end)
 	{
 		int pos = (begin + end) / 2;

tools/case.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python
 
-# Copyright (C) 2012-2018 Reece H. Dunn
+# Copyright (C) 2012-2018, 2021 Reece H. Dunn
 #
 # This file is part of ucd-tools.
 #
@@ -33,7 +33,7 @@ for data in ucd.parse_ucd_data(ucd_rootdir, 'UnicodeData'):
 if __name__ == '__main__':
 	sys.stdout.write("""/* Unicode Case Conversion
  *
- * Copyright (C) 2012-2018 Reece H. Dunn
+ * Copyright (C) 2012-2018, 2021 Reece H. Dunn
  *
  * This file is part of ucd-tools.
  *
@@ -83,7 +83,7 @@ struct case_conversion_entry
 		sys.stdout.write('codepoint_t ucd_to%s(codepoint_t c)\n' % case)
 		sys.stdout.write('{\n')
 		sys.stdout.write('\tint begin = 0;\n')
-		sys.stdout.write('\tint end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]);\n')
+		sys.stdout.write('\tint end   = sizeof(case_conversion_data)/sizeof(case_conversion_data[0]) - 1;\n')
 		sys.stdout.write('\twhile (begin <= end)\n')
 		sys.stdout.write('\t{\n')
 		sys.stdout.write('\t\tint pos = (begin + end) / 2;\n')