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Libuavcan DSDL compiler: Speed optimization - full generation takes less than a second (way faster than Mako)

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This commit is contained in:
Pavel Kirienko 2014-07-22 02:53:07 +04:00
parent 5d7666f059
commit dca2611c31
1 changed files with 15 additions and 11 deletions
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26
libuavcan/dsdl_compiler/libuavcan_dsdl_compiler/__init__.py
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@ -95,12 +95,13 @@ def run_parser(source_dirs, search_dirs):
def run_generator(types, dest_dir):
try:
template_expander = make_template_expander(TEMPLATE_FILENAME)
dest_dir = os.path.abspath(dest_dir) # Removing '..'
makedirs(dest_dir)
for t in types:
logger.info('Generating type %s', t.full_name)
filename = os.path.join(dest_dir, type_output_filename(t))
text = generate_one_type(t)
text = generate_one_type(template_expander, t)
write_generated_data(filename, text)
except Exception as ex:
logger.info('Generator failure', exc_info=True)
@ -157,7 +158,7 @@ def type_to_cpp_type(t):
else:
raise DsdlCompilerException('Unknown type category: %s' % t.category)
def generate_one_type(t):
def generate_one_type(template_expander, t):
t.short_name = t.full_name.split('.')[-1]
t.cpp_type_name = t.short_name + '_'
t.cpp_full_type_name = '::' + t.full_name.replace('.', '::')
@ -220,13 +221,13 @@ def generate_one_type(t):
}[t.kind]
# Generation
text = expand_template(t=t) # t for Type
text = template_expander(t=t) # t for Type
text = '\n'.join(x.rstrip() for x in text.splitlines())
text = text.replace('\n\n\n\n\n', '\n\n').replace('\n\n\n\n', '\n\n').replace('\n\n\n', '\n\n')
text = text.replace('{\n\n ', '{\n ')
return text
def expand_template(**args):
def make_template_expander(filename):
'''
Templating is based on pyratemp (http://www.simple-is-better.org/template/pyratemp.html).
The pyratemp's syntax is rather verbose and not so human friendly, so we define some
@ -245,7 +246,7 @@ def expand_template(**args):
% endfor
The extended syntax is converted into pyratemp's through regexp substitution.
'''
with open(TEMPLATE_FILENAME) as f:
with open(filename) as f:
template_text = f.read()
# Backslash-newline elimination
@ -269,11 +270,14 @@ def expand_template(**args):
template_text = re.sub(r'(\<\!--\(macro\ [a-zA-Z0-9_]+\)--\>.*?)', r'\1\n', template_text)
# Preprocessed text output for debugging
# with open(TEMPLATE_FILENAME + '.d', 'w') as f:
# f.write(template_text)
# with open(filename + '.d', 'w') as f:
# f.write(template_text)
# This function adds one indentation level (4 spaces); it will be used from the template
args['indent'] = lambda text, idnt = ' ': idnt + text.replace('\n', '\n' + idnt)
template = Template(template_text)
t = Template(template_text)
return t(**args)
def expand(**args):
# This function adds one indentation level (4 spaces); it will be used from the template
args['indent'] = lambda text, idnt = ' ': idnt + text.replace('\n', '\n' + idnt)
return template(**args)
return expand