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     return 'stringLiteral(STRING_LITERAL_LIST[{}] /* string: {} */)'.format(
  16         c_string_literal.index,
  17         repr(c_string_literal.value),
  18     )
  19
  20 def generate_symbol_expression(symbol_expression):
  21     return 'Environment_get(environment, SYMBOL_LIST[{}] /* symbol: {} */)'.format(
  22         symbol_expression.symbol_list_index,
  23         symbol_expression.symbol,
  24     )
  25
  26 def generate_variable_expression(expression):
  27     return expression.variable
  28
  29 def generate_function_call_for_fur_infix_operator(expression):
  30     return 'operator${}(stack, jump, {})'.format(
  31         expression.name,
  32         expression.metadata.line,
  33     )
  34
  35 def generate_structure_literal_expression(expression):
  36     return 'Structure_construct({}, {}, {})'.format(
  37         expression.field_count,
  38         expression.symbol_list_variable,
  39         expression.value_list_variable,
  40     )
  41
  42 def generate_dot_expression(expression):
  43     return 'Structure_get(&{}, SYMBOL_LIST[{}] /* symbol: "{}" */)'.format(
  44         generate_variable_expression(expression.instance),
  45         expression.symbol_list_index,
  46         expression.symbol,
  47     )
  48
  49 def generate_list_construct_expression(expression):
  50     return 'List_construct({})'.format(expression.allocate)
  51
  52 def generate_list_get_expression(expression):
  53     return 'List_get(&{}, {})'.format(
  54         generate_expression(expression.list_expression),
  55         generate_expression(expression.index_expression),
  56     )
  57
  58 def generate_expression(expression):
  59     return {
  60         transformation.CDotExpression: generate_dot_expression,
  61         transformation.CFunctionCallExpression: generate_function_call,
  62         transformation.CFunctionCallForFurInfixOperator: generate_function_call_for_fur_infix_operator,
  63         transformation.CIntegerLiteral: generate_integer_literal,
  64         transformation.CListConstructExpression: generate_list_construct_expression,
  65         transformation.CListGetExpression: generate_list_get_expression,
  66         transformation.CNegationExpression: generate_negation_expression,
  67         transformation.CStringLiteral: generate_string_literal,
  68         transformation.CStructureLiteralExpression: generate_structure_literal_expression,
  69         transformation.CSymbolExpression: generate_symbol_expression,
  70         transformation.CVariableExpression: generate_variable_expression,
  71     }[type(expression)](expression)
  72
  73 def generate_negation_expression(c_negation_expression):
  74     return 'operator$negate({})'.format(
  75         generate_expression(c_negation_expression.value)
  76     )
  77
  78 def generate_function_call(function_call):
  79     # This gets called twice, so we want to be sure it is efficient and without side effects
  80     assert isinstance(function_call.function_expression, transformation.CVariableExpression)
  81
  82     # TODO Check the type of the things being called
  83     function_expression = generate_variable_expression(function_call.function_expression)
  84     return '{}.instance.closure.call(environmentPool, {}.instance.closure.closed, {}, stack, jump)'.format(
  85         function_expression,
  86         function_expression,
  87         function_call.argument_count,
  88     )
  89
  90 def generate_expression_statement(statement):
  91     return 'Object_deinitialize(&({}));'.format(generate_expression(statement.expression))
  92
  93 def generate_symbol_assignment_statement(statement):
  94     return 'Environment_set(environment, SYMBOL_LIST[{}] /* symbol: {} */, {});'.format(
  95         statement.target_symbol_list_index,
  96         statement.target,
  97         generate_expression(statement.expression),
  98     )
  99
 100 def generate_array_variable_initialization_statement(statement):
 101     return 'Object {}[] = {{ {} }};'.format(
 102         statement.variable,
 103         ', '.join(generate_expression(i) for i in statement.items),
 104     )
 105
 106 def generate_symbol_array_variable_initialization_statement(statement):
 107     return 'const char* {}[] = {{ {} }};'.format(
 108         statement.variable,
 109         ', '.join('SYMBOL_LIST[{}] /* symbol: "{}" */'.format(
 110             statement.symbol_list_indices[i],
 111             statement.symbol_list[i],
 112         ) for i in range(len(statement.symbol_list))),
 113     )
 114
 115 def generate_variable_initialization_statement(statement):
 116     return 'Object {} = {};'.format(
 117         statement.variable,
 118         generate_expression(statement.expression),
 119     )
 120
 121 def generate_variable_reassignment_statement(statement):
 122     return '{} = {};'.format(
 123         statement.variable,
 124         generate_expression(statement.expression),
 125     )
 126
 127
 128 def indent(s):
 129     return '\n'.join(' ' * 2 + l for l in s.split('\n'))
 130
 131 def generate_if_else_statement(statement):
 132     # TODO Check that the argument is boolean
 133     condition_expression = '{}.instance.boolean'.format(
 134         generate_expression(statement.condition_expression),
 135     )
 136
 137     if len(statement.if_statement_list) == 0:
 138         condition_expression = '!({})'.format(condition_expression)
 139         if_statement_list = statement.else_statement_list
 140         else_statement_list = ()
 141     else:
 142         if_statement_list = statement.if_statement_list
 143         else_statement_list = statement.else_statement_list
 144
 145     generated_if_clause = 'if({})'.format(condition_expression)
 146
 147     if len(if_statement_list) == 0:
 148         generated_if_statement_list = ';'
 149     else:
 150         generated_if_statement_list = indent('\n{{\n{}\n}}'.format(
 151             indent('\n'.join(generate_statement(s) for s in if_statement_list)),
 152         ))
 153
 154     if len(else_statement_list) == 0:
 155         generated_else_statement_list = ''
 156     else:
 157         generated_else_statement_list = indent('\nelse\n{{\n{}\n}}'.format(
 158             indent('\n'.join(generate_statement(s) for s in else_statement_list)),
 159         ))
 160
 161     return generated_if_clause + generated_if_statement_list + generated_else_statement_list
 162
 163 def generate_function_declaration(statement):
 164     return 'Environment_set(environment, "{}", (Object){{ CLOSURE, (Instance)(Closure){{ environment, user${}$implementation }} }});'.format(statement.name, statement.name)
 165
 166 def generate_list_append_statement(statement):
 167     return 'List_append(&{}, {});'.format(
 168         generate_expression(statement.list_expression),
 169         generate_expression(statement.item_expression),
 170     )
 171
 172 def generate_push_statement(statement):
 173     return 'Stack_push(stack, {});'.format(generate_expression(statement.expression))
 174
 175 def generate_statement(statement):
 176     return {
 177         transformation.CArrayVariableInitializationStatement: generate_array_variable_initialization_statement,
 178         transformation.CExpressionStatement: generate_expression_statement,
 179         transformation.CFunctionDeclaration: generate_function_declaration,
 180         transformation.CIfElseStatement: generate_if_else_statement,
 181         transformation.CListAppendStatement: generate_list_append_statement,
 182         transformation.CPushStatement: generate_push_statement,
 183         transformation.CSymbolAssignmentStatement: generate_symbol_assignment_statement,
 184         transformation.CSymbolArrayVariableInitializationStatement: generate_symbol_array_variable_initialization_statement,
 185         transformation.CVariableInitializationStatement: generate_variable_initialization_statement,
 186         transformation.CVariableReassignmentStatement: generate_variable_reassignment_statement,
 187     }[type(statement)](statement)
 188
 189 def generate_function_definition(definition):
 190     template = ENV.get_template('function_definition.c')
 191     return template.render(
 192         name=definition.name,
 193         argument_name_list=definition.argument_name_list,
 194         statement_list=list(generate_statement(s) for s in definition.statement_list),
 195     )
 196     return definition
 197
 198 C_ESCAPES = {
 199     '"':    r'\"',
 200 }
 201
 202 def escape_character(ch):
 203     return C_ESCAPES.get(ch, ch)
 204
 205 def escape_string_literal(string_literal):
 206     return  ''.join(escape_character(ch) for ch in string_literal)
 207
 208 def generate(program):
 209     template = ENV.get_template('program.c')
 210     return template.render(
 211         builtins=tuple(sorted(program.builtin_set)),
 212         function_definition_list=list(generate_function_definition(fd) for fd in program.function_definition_list),
 213         infix_declarations=program.operator_declarations,
 214         statements=list(generate_statement(s) for s in program.statements),
 215         standard_libraries=list(sorted(program.standard_libraries)),
 216         string_literal_list=list(escape_string_literal(s) for s in program.string_literal_list),
 217         symbol_list=program.symbol_list,
 218     )
 219
 220 if __name__ == '__main__':
 221     import unittest
 222
 223     unittest.main()