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68 lines
1.8 KiB
Python
68 lines
1.8 KiB
Python
"""Python implementation of Programs/_freeze_module.c
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The pure Python implementation uses same functions and arguments as the C
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implementation.
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The generated byte code is slightly different because
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compile() sets the PyCF_SOURCE_IS_UTF8 flag and objects have a
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reference count > 1. Marshal adds the `FLAG_REF` flag and creates a
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reference `hashtable`.
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"""
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import marshal
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import sys
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header = "/* Auto-generated by Programs/_freeze_module.py */"
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def read_text(inpath: str) -> bytes:
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with open(inpath, "rb") as f:
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return f.read()
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def compile_and_marshal(name: str, text: bytes) -> bytes:
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filename = f"<frozen {name}>"
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# exec == Py_file_input
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code = compile(text, filename, "exec", optimize=0, dont_inherit=True)
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return marshal.dumps(code)
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def get_varname(name: str, prefix: str) -> str:
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return f"{prefix}{name.replace('.', '_')}"
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def write_code(outfile, marshalled: bytes, varname: str) -> None:
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data_size = len(marshalled)
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outfile.write(f"const unsigned char {varname}[] = {{\n")
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for n in range(0, data_size, 16):
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outfile.write(" ")
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outfile.write(",".join(str(i) for i in marshalled[n : n + 16]))
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outfile.write(",\n")
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outfile.write("};\n")
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def write_frozen(outpath: str, inpath: str, name: str, marshalled: bytes) -> None:
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with open(outpath, "w") as outfile:
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outfile.write(header)
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outfile.write("\n")
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arrayname = get_varname(name, "_Py_M__")
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write_code(outfile, marshalled, arrayname)
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def main():
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if len(sys.argv) != 4:
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sys.exit("need to specify the name, input and output paths\n")
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name = sys.argv[1]
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inpath = sys.argv[2]
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outpath = sys.argv[3]
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text = read_text(inpath)
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marshalled = compile_and_marshal(name, text)
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write_frozen(outpath, inpath, name, marshalled)
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if __name__ == "__main__":
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main()
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