Generate a C program (which has a memory error after completion, but still)

[fur] / c_generation.py

diff --git a/c_generation.py b/c_generation.py
new file mode 100644 (file)
index 0000000..6dd4551
--- /dev/null
+++ b/c_generation.py
@@ -0,0 +1,66 @@
+import os
+
+import jinja2
+
+import crossplatform_ir_generation
+
+TEMPLATE_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'templates')
+
+def separate_labels_and_instructions(entry_list):
+    labels_to_instruction_indices = {}
+    instruction_list = []
+
+    for entry in entry_list:
+        if isinstance(entry, crossplatform_ir_generation.CIRInstruction):
+            instruction_list.append(entry)
+        elif isinstance(entry, crossplatform_ir_generation.CIRLabel):
+            labels_to_instruction_indices[entry.label] = len(instruction_list)
+
+    return labels_to_instruction_indices, tuple(instruction_list)
+
+def generate_integer_argument(argument):
+    assert isinstance(argument, int)
+    return '(int32_t){}'.format(argument)
+
+def generate_null_argument(argument):
+    assert argument is None
+    return 'NULL'
+
+def generate_size_t_argument(argument):
+    assert isinstance(argument, int)
+    return '(size_t){}'.format(argument)
+
+def generate_string_argument(argument):
+    return argument
+
+def generate_symbol_argument(argument):
+    assert argument.startswith('sym(') and argument.endswith(')')
+    return '"{}"'.format(argument[4:-1])
+
+def generate_argument(instruction):
+    try:
+        return {
+            'drop': generate_null_argument,
+            'end': generate_null_argument,
+            'call': generate_size_t_argument,
+            'push': generate_symbol_argument,
+            'push_integer': generate_integer_argument,
+            'push_string': generate_string_argument,
+        }[instruction.instruction](instruction.argument)
+
+    except KeyError:
+        import ipdb; ipdb.set_trace()
+
+def generate(ir):
+    environment = jinja2.Environment(loader=jinja2.FileSystemLoader(TEMPLATE_PATH))
+    template = environment.get_template('program2.c')
+
+    labels_to_instruction_indices, instruction_list = separate_labels_and_instructions(
+        ir.entry_list,
+    )
+
+    return template.render(
+        labels_to_instruction_indices=labels_to_instruction_indices,
+        instruction_list=instruction_list,
+        generate_argument=generate_argument,
+    )