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* src/cksum.c (min_digest_line_length, digest_hex_bytes)
(digest_length, md5_sum_stream, sha1_sum_stream)
(sha224_sum_stream, sha256_sum_stream, sha384_sum_stream)
(sha512_sum_stream, sha2_sum_stream, sha3_sum_stream)
(blake2b_sum_stream, sm3_sum_stream, problematic_chars)
(filename_unescape, valid_digits, bsd_split_3)
(algorithm_from_tag, split_3, digest_file, output_file)
(b64_equal, hex_equal, digest_check, main):
* src/cksum_avx2.c (cksum_avx2):
* src/cksum_avx512.c (cksum_avx512):
* src/cksum_crc.c (cksum_fp_t, cksum_slice8, crc_sum_stream)
(crc32b_sum_stream, output_crc):
* src/cksum_pclmul.c (cksum_pclmul):
* src/cksum_vmull.c (cksum_vmull):
* src/sum.c (bsd_sum_stream, sysv_sum_stream, output_bsd, output_sysv):
Prefer signed to unsigned int where either will do.
This allows better checking with -fsanitize=undefined.
It should also help simplify future patches, so that they
needn’t worry whether comparisons like ‘i < len - 2’ will misbehave.
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