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Elliott Sales de Andrade authored and GitHub committed 9015a81d0e9
GH-44769: [C++][Parquet] Fix read/write of metadata length footer on big-endian systems (#44787) ### Rationale for this change See issue. ### What changes are included in this PR? - [Fix writing Parquet metadata length footer](https://github.com/apache/arrow/commit/fd3cf89d3c978078d96300f770eccc8e7de4bc40) By converting the `uint32_t` to little endian before casting to a `uint8_t*`, this is always correct in the output file. - [Fix reading Parquet metadata length footer](https://github.com/apache/arrow/commit/4b1dd1b6e5533096764d2541842b4f5fdf858a4e) ### Are these changes tested? Yes. ### Are there any user-facing changes? Reading a Parquet file won't complain about metadata size in the footer, though that doesn't guarantee anything else will work yet. * GitHub Issue: #44769 Authored-by: Elliott Sales de Andrade <quantum.analyst@gmail.com> Signed-off-by: mwish <maplewish117@gmail.com>