Add tests for the isdigit and isxdigit ctype APIs.

tests/printcdata.c

 	else
 	{
 		for (codepoint_t c = 0; c <= 0x10FFFF; ++c)
-			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %is %iu %il\n");
+			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %iu %il\n");
 	}
 	return 0;
 }

tests/printucddata.c

 	else
 	{
 		for (codepoint_t c = 0; c <= 0x10FFFF; ++c)
-			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %is %iu %il\n");
+			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %iu %il\n");
 	}
 	return 0;
 }

tests/printucddata_cpp.cpp

 	else
 	{
 		for (ucd::codepoint_t c = 0; c <= 0x10FFFF; ++c)
-			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %is %iu %il\n");
+			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %iu %il\n");
 	}
 	return 0;
 }

tools/printdata.py

 			for codepoint in data['CodePoint']:
 				unicode_chars[codepoint] = data
 
+def isdigit(data):
+	return 1 if data['CodePoint'].char() in '0123456789' else 0
+
+def isxdigit(data):
+	return 1 if data['CodePoint'].char() in '0123456789ABCDEFabcdef' else 0
+
 def isspace(data):
 	return data.get('White_Space', 0)
 
 		try:
 			data = unicode_chars[codepoint]
 		except KeyError:
-			data = {}
+			data = {'CodePoint': codepoint}
 		script = data.get('Script', 'Zzzz')
 		title = data.get('TitleCase', codepoint)
 		upper = data.get('UpperCase', codepoint)
 		if title == null: title = codepoint
 		if upper == null: upper = codepoint
 		if lower == null: lower = codepoint
-		print('%s %s %s %s %s %s %s %s %s %s' % (
+		print('%s %s %s %s %s %s %s %s %s %s %s %s' % (
 		      codepoint, script,
 		      data.get('GeneralCategory', 'Cn')[0], data.get('GeneralCategory', 'Cn'),
 		      upper, lower, title,
+		      isdigit(data), isxdigit(data),
 		      isspace(data),
 		      isupper(data), islower(data)))

tools/ucd.py

 	def __lt__(self, other):
 		return self.codepoint < other.codepoint
 
+	def char(self):
+		return unichr(self.codepoint)
+
 class CodeRange:
 	def __init__(self, x):
 		f, l = x.split('..')
 	def size(self):
 		return self.last.codepoint - self.first.codepoint + 1
 
+	def char(self):
+		return unichr(self.first.codepoint)
+
 def codepoint(x):
 	if '..' in x[0]:
 		return CodeRange(x[0]), x[1:]