Mercurial > ldforge2 / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/caseconversions.py	Sun Feb 02 00:30:48 2020 +0200
@@ -0,0 +1,119 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+'''
+Provides facilities to converting identifier cases.
+'''
+
+#
+#	Copyright 2015 Teemu Piippo
+#	All rights reserved.
+#
+#	Redistribution and use in source and binary forms, with or without
+#	modification, are permitted provided that the following conditions
+#	are met:
+#
+#	1. Redistributions of source code must retain the above copyright
+#	   notice, this list of conditions and the following disclaimer.
+#	2. Redistributions in binary form must reproduce the above copyright
+#	   notice, this list of conditions and the following disclaimer in the
+#	   documentation and/or other materials provided with the distribution.
+#	3. Neither the name of the copyright holder nor the names of its
+#	   contributors may be used to endorse or promote products derived from
+#	   this software without specific prior written permission.
+#
+#	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+#	TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+#	PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
+#	OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+#	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+#	PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+#	LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+#	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+#	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+import string
+import re
+
+def to_one_case (name, tolower):
+	'''
+	Convers name to either all uppercase or all lowercase (depending on the truth value of tolower), using underscores
+	as delimiters.
+	'''
+	result = ""
+	targetSet = (string.ascii_lowercase if tolower else string.ascii_uppercase) + string.digits
+	inverseSet = (string.ascii_uppercase if tolower else string.ascii_lowercase)
+	isUnderscorable = lambda ch: ch in string.ascii_uppercase \
+		or ch in string.whitespace or ch in string.punctuation
+	previousWasUnderscorable = isUnderscorable (name[0])
+
+	for ch in name:
+		if isUnderscorable (ch) and result != "" and not previousWasUnderscorable:
+			result += "_"
+
+		if ch in inverseSet:
+			result += (ch.lower() if tolower else ch.upper())
+		elif ch in targetSet:
+			result += ch
+		previousWasUnderscorable = isUnderscorable (ch)
+
+	return result
+
+def to_camel_case (name, java = False):
+	'''
+	Converts name to camelcase. If java is False, the first letter will be lowercase, otherwise it will be uppercase.
+	'''
+	result = ""
+	wantUpperCase = False
+
+	# If it's all uppercase, make it all lowercase so that this algorithm can digest it
+	if name == name.upper():
+		name = name.lower()
+
+	for ch in name:
+		if ch == '_':
+			wantUpperCase = True
+			continue
+
+		if wantUpperCase:
+			if ch in string.ascii_lowercase:
+				ch = ch.upper()
+			wantUpperCase = False
+
+		result += ch
+
+	if java:
+		match = re.match (r'^([A-Z]+)([A-Z].+)$', result)
+		if match:
+			result = match.group (1).lower() + match.group (2)
+		else:
+			result = result[0].lower() + result[1:]
+	else:
+		result = result[0].upper() + result[1:]
+	return result
+
+case_styles = {
+	'lower': lambda name: to_one_case (name, tolower=True),
+	'upper': lambda name: to_one_case (name, tolower=False),
+	'camel': lambda name: to_camel_case (name, java=False),
+	'java': lambda name: to_camel_case (name, java=True),
+}
+
+def convert_case (name, style):
+	'''
+	Converts name to the given style. Style may be one of:
+		- 'lower': 'foo_barBaz' -> 'foo_bar_baz'
+		- 'upper': 'foo_barBaz' -> 'FOO_BAR_BAZ'
+		- 'camel': 'foo_barBaz' -> 'FooBarBaz'
+		- 'java': 'foo_barBaz' -> 'fooBarBaz'
+	'''
+	try:
+		stylefunc = case_styles[style]
+	except KeyError:
+		validstyles = ', '.join (sorted (case_styles.keys()))
+		raise ValueError ('Unknown style "%s", should be one of: %s' % (style, validstyles))
+	else:
+		return stylefunc (name)
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