112 lines
3.0 KiB
Python
112 lines
3.0 KiB
Python
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class MacroProcessor:
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def __init__(self):
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self.macro_name_table = {}
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self.macro_definition_table = {}
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self.mdt_index = 0
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def process_pass1(self, source_code):
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inside_macro = False
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current_macro_name = None
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macro_definition = []
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for line in source_code:
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tokens = line.strip().split()
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if not tokens:
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continue
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if tokens[0] == 'MACRO':
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inside_macro = True
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continue
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if inside_macro and tokens[0] == 'MEND':
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inside_macro = False
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self.macro_definition_table[current_macro_name] = macro_definition[:]
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self.macro_name_table[current_macro_name] = self.mdt_index
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self.mdt_index += len(macro_definition)
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macro_definition = []
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current_macro_name = None
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continue
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if inside_macro:
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if not current_macro_name:
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current_macro_name = tokens[0]
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macro_definition.append(line.strip())
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else:
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pass
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def process_pass2(self, source_code):
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output = []
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inside_macro = False
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for line in source_code:
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tokens = line.strip().split()
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if not tokens:
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continue
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if tokens[0] == 'MACRO':
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inside_macro = True
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continue
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elif tokens[0] == 'MEND':
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inside_macro = False
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continue
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if inside_macro:
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continue
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macro_name = tokens[0]
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if macro_name in self.macro_name_table:
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macro_def = self.macro_definition_table[macro_name]
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args = tokens[1:]
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output.extend(self.expand_macro(macro_def, args))
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else:
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output.append(line.strip())
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return output
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def expand_macro(self, macro_def, args):
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expanded_lines = []
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for line in macro_def:
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for i, arg in enumerate(args):
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line = line.replace(f"&ARG{i+1}", arg)
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expanded_lines.append(line)
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return expanded_lines
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def display_tables(self):
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print("Macro Name Table (MNT):")
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for name, index in self.macro_name_table.items():
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print(f"Macro Name: {name}, MDT Index: {index}")
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print("\nMacro Definition Table (MDT):")
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for name, definition in self.macro_definition_table.items():
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print(f"Macro Name: {name}")
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for line in definition:
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print(f"\t{line}")
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source_code = [
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"MACRO",
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"INCR &ARG1",
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"ADD &ARG1, ONE",
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"MEND",
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"MACRO",
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"DECR &ARG1",
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"SUB &ARG1, ONE",
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"MEND",
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"START",
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"INCR A",
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"DECR B",
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"END",
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]
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macro_processor = MacroProcessor()
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macro_processor.process_pass1(source_code)
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macro_processor.display_tables()
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expanded_code = macro_processor.process_pass2(source_code)
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print("\nExpanded Source Code (Pass 2):")
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for line in expanded_code:
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print(line)
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