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#!/usr/bin/python
##
## license:BSD-3-Clause
## copyright-holders:Vas Crabb
import os
import sys
import xml.sax
import xml.sax.saxutils
import zlib
class ErrorHandler(object):
def __init__(self, **kwargs):
super(ErrorHandler, self).__init__(**kwargs)
self.errors = 0
self.warnings = 0
def error(self, exception):
self.errors += 1
sys.stderr.write('error: %s' % (exception))
def fatalError(self, exception):
raise exception
def warning(self, exception):
self.warnings += 1
sys.stderr.write('warning: %s' % (exception))
class Minifyer(object):
def __init__(self, output, **kwargs):
super(Minifyer, self).__init__(**kwargs)
self.output = output
self.incomplete_tag = False
self.element_content = ''
def setDocumentLocator(self, locator):
pass
def startDocument(self):
self.output('<?xml version="1.0"?>')
def endDocument(self):
self.output('\n')
def startElement(self, name, attrs):
self.flushElementContent()
if self.incomplete_tag:
self.output('>')
self.output('<%s' % (name))
for name in attrs.getNames():
self.output(' %s=%s' % (name, xml.sax.saxutils.quoteattr(attrs[name])))
self.incomplete_tag = True
def endElement(self, name):
self.flushElementContent()
if self.incomplete_tag:
self.output('/>')
else:
self.output('</%s>' % (name))
self.incomplete_tag = False
def characters(self, content):
self.element_content += content
def ignorableWhitespace(self, whitespace):
pass
def processingInstruction(self, target, data):
pass
def flushElementContent(self):
self.element_content = self.element_content.strip()
if self.element_content:
if self.incomplete_tag:
self.output('>')
self.incomplete_tag = False
self.output(xml.sax.saxutils.escape(self.element_content))
self.element_content = ''
class XmlError(Exception):
pass
def compressLayout(src, dst, comp):
state = [0, 0]
def write(block):
for ch in bytearray(block):
if 0 == state[0]:
dst('\t')
elif 0 == (state[0] % 32):
dst(',\n\t')
else:
dst(', ')
state[0] += 1
dst('%3u' % (ch))
def output(text):
block = text.encode('UTF-8')
state[1] += len(block)
write(comp.compress(block))
error_handler = ErrorHandler()
content_handler = Minifyer(output)
parser = xml.sax.make_parser()
parser.setErrorHandler(error_handler)
parser.setContentHandler(content_handler)
try:
parser.parse(src)
write(comp.flush())
dst('\n')
except xml.sax.SAXException as exception:
print('fatal error: %s' % (exception))
raise XmlError('Fatal error parsing XML')
if (error_handler.errors > 0) or (error_handler.warnings > 0):
raise XmlError('Error(s) and/or warning(s) parsing XML')
return state[1], state[0]
if __name__ == '__main__':
if len(sys.argv) != 4:
print('Usage:')
print(' complay <source.lay> <output.h> <varname>')
sys.exit(0 if len(sys.argv) <= 1 else 1)
srcfile = sys.argv[1]
dstfile = sys.argv[2]
varname = sys.argv[3]
comp_type = 1
try:
dst = open(dstfile,'w')
dst.write('static const unsigned char %s_data[] = {\n' % (varname))
byte_count, comp_size = compressLayout(srcfile, lambda x: dst.write(x), zlib.compressobj())
dst.write('};\n\n')
dst.write('const internal_layout %s = {\n' % (varname))
dst.write('\t%d, sizeof(%s_data), %d, %s_data\n' % (byte_count, varname, comp_type, varname))
dst.write('};\n')
dst.close()
except XmlError:
dst.close()
os.remove(dstfile)
sys.exit(2)
except IOError:
sys.stderr.write("Unable to open output file '%s'\n" % dstfile)
os.remove(dstfile)
dst.close()
sys.exit(3)
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