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https://github.com/dgelessus/python-rsrcfork.git
synced 2025-02-19 06:31:29 +00:00
Rewrite __main__ code to use stream-based resource reading
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dgelessus
parent
5c96baea29
commit
2907d9f9e8
@ -1,6 +1,8 @@
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import argparse
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import enum
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import io
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import itertools
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import shutil
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import sys
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import typing
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@ -183,11 +185,12 @@ def filter_resources(rf: api.ResourceFile, filters: typing.Sequence[str]) -> typ
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yield res
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def hexdump(data: bytes) -> typing.Iterable[str]:
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def hexdump_stream(stream: typing.BinaryIO) -> typing.Iterable[str]:
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last_line = None
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asterisk_shown = False
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for i in range(0, len(data), 16):
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line = data[i:i + 16]
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line = stream.read(16)
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i = 0
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while line:
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# If the same 16-byte lines appear multiple times, print only the first one, and replace all further lines with a single line with an asterisk.
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# This is unambiguous - to find out how many lines were collapsed this way, the user can compare the addresses of the lines before and after the asterisk.
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if line == last_line:
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@ -201,14 +204,26 @@ def hexdump(data: bytes) -> typing.Iterable[str]:
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yield f"{i:08x} {line_hex_left:<{8*2+7}} {line_hex_right:<{8*2+7}} |{line_char}|"
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asterisk_shown = False
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last_line = line
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i += len(line)
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line = stream.read(16)
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if data:
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yield f"{len(data):08x}"
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if i:
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yield f"{i:08x}"
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def hexdump(data: bytes) -> typing.Iterable[str]:
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yield from hexdump_stream(io.BytesIO(data))
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def raw_hexdump_stream(stream: typing.BinaryIO) -> typing.Iterable[str]:
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line = stream.read(16)
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while line:
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yield " ".join(f"{byte:02x}" for byte in line)
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line = stream.read(16)
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def raw_hexdump(data: bytes) -> typing.Iterable[str]:
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for i in range(0, len(data), 16):
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yield " ".join(f"{byte:02x}" for byte in data[i:i + 16])
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yield from raw_hexdump_stream(io.BytesIO(data))
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def translate_text(data: bytes) -> str:
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@ -267,77 +282,80 @@ def show_filtered_resources(resources: typing.Sequence[api.Resource], format: st
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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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open_func = res.open
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else:
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data = res.data_raw
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open_func = res.open_raw
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if format in ("dump", "dump-text"):
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# Human-readable info and hex or text 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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if format == "dump":
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for line in hexdump(data):
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print(line)
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elif format == "dump-text":
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print(translate_text(data))
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else:
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raise AssertionError(f"Unhandled format: {format!r}")
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print()
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elif format == "hex":
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# Data only as hex
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for line in raw_hexdump(data):
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print(line)
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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_with_none = [_REZ_ATTR_NAMES[attr] for attr in attrs]
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if None in attr_descs_with_none:
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attr_descs = [f"${res.attributes.value:02X}"]
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else:
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attr_descs = typing.cast(typing.List[str], attr_descs_with_none)
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parts = [str(res.id)]
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if res.name is not None:
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parts.append(bytes_quote(res.name, '"'))
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parts += attr_descs
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quoted_restype = bytes_quote(res.type, "'")
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print(f"data {quoted_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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with open_func() as f:
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if format in ("dump", "dump-text"):
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# Human-readable info and hex or text 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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if format == "dump":
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for line in hexdump_stream(f):
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print(line)
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elif format == "dump-text":
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print(translate_text(f.read()))
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else:
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raise AssertionError(f"Unhandled format: {format!r}")
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print()
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elif format == "hex":
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# Data only as hex
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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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for line in raw_hexdump_stream(f):
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print(line)
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elif format == "raw":
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# Data only as raw bytes
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shutil.copyfileobj(f, sys.stdout.buffer)
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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_with_none = [_REZ_ATTR_NAMES[attr] for attr in attrs]
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if None in attr_descs_with_none:
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attr_descs = [f"${res.attributes.value:02X}"]
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else:
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attr_descs = typing.cast(typing.List[str], attr_descs_with_none)
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parts = [str(res.id)]
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if res.name is not None:
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parts.append(bytes_quote(res.name, '"'))
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parts += attr_descs
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quoted_restype = bytes_quote(res.type, "'")
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print(f"data {quoted_restype} ({', '.join(parts)}{attrs_comment}) {{")
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line = f.read(16)
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while line:
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# Two-byte grouping is really annoying to implement.
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groups = []
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for j in range(0, 16, 2):
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if j >= len(line):
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break
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elif j+1 >= len(line):
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groups.append(f"{line[j]:02X}")
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else:
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groups.append(f"{line[j]:02X}{line[j+1]:02X}")
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s = f'$"{" ".join(groups)}"'
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comment = "/* " + line.decode(_TEXT_ENCODING).translate(_TRANSLATE_NONPRINTABLES) + " */"
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print(f"\t{s:<54s}{comment}")
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line = f.read(16)
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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_resources(resources: typing.List[api.Resource], *, sort: bool, group: str, decompress: bool) -> None:
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