code.kerkeslager.com Git - fur/blob - generation.py

   1 import jinja2
   2
   3 import transformation
   4
   5 ENV = jinja2.Environment(
   6     autoescape=jinja2.select_autoescape([]),
   7     loader=jinja2.FileSystemLoader('templates'),
   8     trim_blocks=True,
   9 )
  10
  11 def generate_integer_literal(c_integer_literal):
  12     return 'integerLiteral({})'.format(c_integer_literal.value)
  13
  14 def generate_string_literal(c_string_literal):
  15     def c_escape(ch):
  16         return {
  17             '\n': r'\n',
  18             '"': r'\"',
  19             '\\': r'\\',
  20         }.get(ch, ch)
  21
  22     return 'stringLiteral(runtime, "{}")'.format(
  23         ''.join(c_escape(ch for ch in c_string_literal.value)),
  24     )
  25
  26 def generate_argument(c_argument):
  27     LITERAL_TYPE_MAPPING = {
  28         transformation.CIntegerLiteral: generate_integer_literal,
  29         transformation.CStringLiteral: generate_string_literal,
  30     }
  31
  32     if type(c_argument) in LITERAL_TYPE_MAPPING:
  33         return LITERAL_TYPE_MAPPING[type(c_argument)](c_argument)
  34
  35     INFIX_TYPE_MAPPING = {
  36         transformation.CAdditionExpression: 'add',
  37         transformation.CSubtractionExpression: 'subtract',
  38         transformation.CMultiplicationExpression: 'multiply',
  39         transformation.CIntegerDivisionExpression: 'integerDivide',
  40         transformation.CModularDivisionExpression: 'modularDivide',
  41     }
  42
  43     return 'builtin${}({}, {})'.format(
  44         INFIX_TYPE_MAPPING[type(c_argument)],
  45         generate_argument(c_argument.left),
  46         generate_argument(c_argument.right),
  47     )
  48
  49 def generate_statement(c_function_call_statement):
  50     return '{}({});'.format(
  51         c_function_call_statement.name,
  52         ', '.join(generate_argument(argument) for argument in c_function_call_statement.arguments),
  53     )
  54
  55 def generate(c_program):
  56     template = ENV.get_template('program.c')
  57     return template.render(
  58         builtins=list(sorted(c_program.builtins)),
  59         statements=[generate_statement(statement) for statement in c_program.statements],
  60         standard_libraries=set(['stdio.h']),
  61     )
  62
  63 if __name__ == '__main__':
  64     import unittest
  65
  66     unittest.main()