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Co-authored-by: djw8605 <79268+djw8605@users.noreply.github.com>
Co-authored-by: djw8605 <79268+djw8605@users.noreply.github.com>
Co-authored-by: djw8605 <79268+djw8605@users.noreply.github.com>
Co-authored-by: djw8605 <79268+djw8605@users.noreply.github.com>
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[WIP] Add support for calculating crc32c checksum
Add CRC32C (Castagnoli) checksum support
Feb 14, 2026
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Adds CRC32C as a new checksum type computed alongside existing checksums (MD5, CRC32, CKSUM, ADLER32, CVMFS).
Uses a software lookup table for the Castagnoli polynomial (0x1EDC6F41), consistent with how POSIX CKSUM is already implemented in this codebase.
XrdChecksum.hh:CRC32C = 0x20enum value,uint32_t m_crc32cstateXrdChecksumCalc.cc: 256-entry lookup table, init/update/finalize/get — mirrors existing CRC32 patternXrdChecksum.cc: Name matching (ordered beforecrc32for correct prefix disambiguation), storage via xattrs, return path inCalc()MultiuserFileSystem.cc: Config parsing forxrootd.chksum crc32cVerified against known test vector:
CRC32C("123456789") = 0xe3069283.💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.