Refactor __main__.main into smaller functions
This commit is contained in:
dgelessus
parent
194c886472
commit
51ae7c6a09
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@ -214,7 +214,7 @@ def _describe_resource(res: api.Resource, *, include_type: bool, decompress: boo
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desc = f"'{restype}' {desc}"
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return desc
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def main():
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def _parse_args() -> argparse.Namespace:
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ap = argparse.ArgumentParser(
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add_help=False,
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fromfile_prefix_chars="@",
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@ -249,6 +249,128 @@ def main():
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ap.add_argument("filter", nargs="*", help="One or more filters to select which resources to display, or omit to show an overview of all resources")
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ns = ap.parse_args()
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return ns
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def _show_header_data(data: bytes, *, format: str) -> None:
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if format == "dump":
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_hexdump(data)
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elif format == "hex":
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_raw_hexdump(data)
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elif format == "raw":
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sys.stdout.buffer.write(data)
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elif format == "derez":
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print("Cannot output file header data in derez format", file=sys.stderr)
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sys.exit(1)
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else:
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raise ValueError(f"Unhandled output format: {format}")
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def _show_filtered_resources(resources: typing.Sequence[api.Resource], format: str, decompress: bool) -> None:
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if not resources:
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if format == "dump":
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print("No resources matched the filter")
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elif format in ("hex", "raw"):
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print("No resources matched the filter", file=sys.stderr)
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sys.exit(1)
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elif format == "derez":
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print("/* No resources matched the filter */")
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else:
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raise AssertionError(f"Unhandled output format: {format}")
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elif format in ("hex", "raw") and len(resources) != 1:
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print(f"Format {format} can only output a single resource, but the filter matched {len(resources)} resources", file=sys.stderr)
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sys.exit(1)
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for res in resources:
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if decompress:
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data = res.data
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else:
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data = res.data_raw
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if format == "dump":
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# Human-readable info and hex dump
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desc = _describe_resource(res, include_type=True, decompress=decompress)
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print(f"Resource {desc}:")
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_hexdump(data)
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print()
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elif format == "hex":
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# Data only as hex
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_raw_hexdump(data)
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elif format == "raw":
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# Data only as raw bytes
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sys.stdout.buffer.write(data)
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elif format == "derez":
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# Like DeRez with no resource definitions
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attrs = list(_decompose_flags(res.attributes))
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if decompress and api.ResourceAttrs.resCompressed in attrs:
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attrs.remove(api.ResourceAttrs.resCompressed)
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attrs_comment = " /* was compressed */"
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else:
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attrs_comment = ""
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attr_descs = [_REZ_ATTR_NAMES[attr] for attr in attrs]
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if None in attr_descs:
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attr_descs[:] = [f"${res.attributes.value:02X}"]
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parts = [str(res.resource_id)]
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if res.name is not None:
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name = _bytes_escape(res.name, quote='"')
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parts.append(f'"{name}"')
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parts += attr_descs
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restype = _bytes_escape(res.resource_type, quote="'")
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print(f"data '{restype}' ({', '.join(parts)}{attrs_comment}) {{")
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for i in range(0, len(data), 16):
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# Two-byte grouping is really annoying to implement.
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groups = []
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for j in range(0, 16, 2):
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if i+j >= len(data):
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break
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elif i+j+1 >= len(data):
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groups.append(f"{data[i+j]:02X}")
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else:
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groups.append(f"{data[i+j]:02X}{data[i+j+1]:02X}")
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s = f'$"{" ".join(groups)}"'
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comment = "/* " + data[i:i + 16].decode(_TEXT_ENCODING).translate(_TRANSLATE_NONPRINTABLES) + " */"
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print(f"\t{s:<54s}{comment}")
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print("};")
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print()
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else:
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raise ValueError(f"Unhandled output format: {format}")
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def _list_resource_file(rf: api.ResourceFile, *, decompress: bool) -> None:
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if rf.header_system_data != bytes(len(rf.header_system_data)):
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print("Header system data:")
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_hexdump(rf.header_system_data)
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if rf.header_application_data != bytes(len(rf.header_application_data)):
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print("Header application data:")
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_hexdump(rf.header_application_data)
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attrs = _decompose_flags(rf.file_attributes)
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if attrs:
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print("File attributes: " + " | ".join(attr.name for attr in attrs))
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if len(rf) > 0:
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print(f"{len(rf)} resource types:")
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for typecode, resources in rf.items():
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restype = _bytes_escape(typecode, quote="'")
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print(f"'{restype}': {len(resources)} resources:")
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for resid, res in rf[typecode].items():
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print(_describe_resource(res, include_type=False, decompress=decompress))
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print()
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else:
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print("No resource types (empty resource file)")
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def main():
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ns = _parse_args()
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if ns.file == "-":
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if ns.fork is not None:
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@ -266,17 +388,7 @@ def main():
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else:
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data = rf.header_application_data
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if ns.format == "dump":
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_hexdump(data)
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elif ns.format == "hex":
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_raw_hexdump(data)
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elif ns.format == "raw":
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sys.stdout.buffer.write(data)
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elif ns.format == "derez":
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print("Cannot output file header data in derez format", file=sys.stderr)
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sys.exit(1)
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else:
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raise ValueError(f"Unhandled output format: {ns.format}")
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_show_header_data(data, format=ns.format)
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elif ns.filter or ns.all:
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if ns.filter:
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resources = _filter_resources(rf, ns.filter)
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@ -285,108 +397,9 @@ def main():
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for reses in rf.values():
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resources.extend(reses.values())
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if not resources:
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if ns.format == "dump":
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print("No resources matched the filter")
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elif ns.format in ("hex", "raw"):
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print("No resources matched the filter", file=sys.stderr)
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sys.exit(1)
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elif ns.format == "derez":
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print("/* No resources matched the filter */")
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else:
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raise AssertionError(f"Unhandled output format: {ns.format}")
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elif ns.format in ("hex", "raw") and len(resources) != 1:
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print(f"Format {ns.format} can only output a single resource, but the filter matched {len(resources)} resources", file=sys.stderr)
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sys.exit(1)
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for res in resources:
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if ns.decompress:
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data = res.data
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else:
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data = res.data_raw
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if ns.format == "dump":
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# Human-readable info and hex dump
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desc = _describe_resource(res, include_type=True, decompress=ns.decompress)
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print(f"Resource {desc}:")
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_hexdump(data)
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print()
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elif ns.format == "hex":
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# Data only as hex
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_raw_hexdump(data)
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elif ns.format == "raw":
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# Data only as raw bytes
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sys.stdout.buffer.write(data)
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elif ns.format == "derez":
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# Like DeRez with no resource definitions
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attrs = list(_decompose_flags(res.attributes))
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if ns.decompress and api.ResourceAttrs.resCompressed in attrs:
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attrs.remove(api.ResourceAttrs.resCompressed)
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attrs_comment = " /* was compressed */"
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else:
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attrs_comment = ""
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attr_descs = [_REZ_ATTR_NAMES[attr] for attr in attrs]
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if None in attr_descs:
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attr_descs[:] = [f"${res.attributes.value:02X}"]
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parts = [str(res.resource_id)]
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if res.name is not None:
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name = _bytes_escape(res.name, quote='"')
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parts.append(f'"{name}"')
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parts += attr_descs
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restype = _bytes_escape(res.resource_type, quote="'")
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print(f"data '{restype}' ({', '.join(parts)}{attrs_comment}) {{")
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for i in range(0, len(data), 16):
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# Two-byte grouping is really annoying to implement.
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groups = []
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for j in range(0, 16, 2):
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if i+j >= len(data):
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break
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elif i+j+1 >= len(data):
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groups.append(f"{data[i+j]:02X}")
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else:
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groups.append(f"{data[i+j]:02X}{data[i+j+1]:02X}")
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s = f'$"{" ".join(groups)}"'
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comment = "/* " + data[i:i + 16].decode(_TEXT_ENCODING).translate(_TRANSLATE_NONPRINTABLES) + " */"
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print(f"\t{s:<54s}{comment}")
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print("};")
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print()
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else:
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raise ValueError(f"Unhandled output format: {ns.format}")
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_show_filtered_resources(resources, format=ns.format, decompress=ns.decompress)
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else:
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if rf.header_system_data != bytes(len(rf.header_system_data)):
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print("Header system data:")
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_hexdump(rf.header_system_data)
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if rf.header_application_data != bytes(len(rf.header_application_data)):
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print("Header application data:")
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_hexdump(rf.header_application_data)
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attrs = _decompose_flags(rf.file_attributes)
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if attrs:
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print("File attributes: " + " | ".join(attr.name for attr in attrs))
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if len(rf) > 0:
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print(f"{len(rf)} resource types:")
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for typecode, resources in rf.items():
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restype = _bytes_escape(typecode, quote="'")
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print(f"'{restype}': {len(resources)} resources:")
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for resid, res in rf[typecode].items():
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print(_describe_resource(res, include_type=False, decompress=ns.decompress))
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print()
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else:
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print("No resource types (empty resource file)")
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_list_resource_file(rf, decompress=ns.decompress)
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sys.exit(0)
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