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Move repeated code to private helper function #8310

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Merged
radarhere merged 1 commit into from
Aug 21, 2024
Merged

Move repeated code to private helper function #8310

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26 changes: 11 additions & 15 deletions src/PIL/TiffImagePlugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2080,38 +2080,34 @@ def readLong(self) -> int:
(value,) = struct.unpack(self.longFmt, self.f.read(4))
return value

@staticmethod
def _verify_bytes_written(bytes_written: int | None, expected: int) -> None:
if bytes_written is not None and bytes_written != expected:
msg = f"wrote only {bytes_written} bytes but wanted {expected}"
raise RuntimeError(msg)

def rewriteLastShortToLong(self, value: int) -> None:
self.f.seek(-2, os.SEEK_CUR)
bytes_written = self.f.write(struct.pack(self.longFmt, value))
if bytes_written is not None and bytes_written != 4:
msg = f"wrote only {bytes_written} bytes but wanted 4"
raise RuntimeError(msg)
self._verify_bytes_written(bytes_written, 4)

def rewriteLastShort(self, value: int) -> None:
self.f.seek(-2, os.SEEK_CUR)
bytes_written = self.f.write(struct.pack(self.shortFmt, value))
if bytes_written is not None and bytes_written != 2:
msg = f"wrote only {bytes_written} bytes but wanted 2"
raise RuntimeError(msg)
self._verify_bytes_written(bytes_written, 2)

def rewriteLastLong(self, value: int) -> None:
self.f.seek(-4, os.SEEK_CUR)
bytes_written = self.f.write(struct.pack(self.longFmt, value))
if bytes_written is not None and bytes_written != 4:
msg = f"wrote only {bytes_written} bytes but wanted 4"
raise RuntimeError(msg)
self._verify_bytes_written(bytes_written, 4)

def writeShort(self, value: int) -> None:
bytes_written = self.f.write(struct.pack(self.shortFmt, value))
if bytes_written is not None and bytes_written != 2:
msg = f"wrote only {bytes_written} bytes but wanted 2"
raise RuntimeError(msg)
self._verify_bytes_written(bytes_written, 2)

def writeLong(self, value: int) -> None:
bytes_written = self.f.write(struct.pack(self.longFmt, value))
if bytes_written is not None and bytes_written != 4:
msg = f"wrote only {bytes_written} bytes but wanted 4"
raise RuntimeError(msg)
self._verify_bytes_written(bytes_written, 4)

def close(self) -> None:
self.finalize()
Expand Down