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Fixing Racket uint8-ref/set!

This commit is contained in:
retropikzel 2025-07-23 19:30:20 +03:00
parent 1e74458e85
commit 78d54f80aa
1 changed files with 11 additions and 5 deletions
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16
foreign/c/c-bytevectors.scm
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@ -551,13 +551,19 @@
(define (c-bytevector-sint-ref c-bytevector index endness size)
(let* ((high-byte (c-bytevector-u8-ref c-bytevector
(if (eq? endness 'big)
index
(+ index size -1))))
(if (eq? endness 'big)
index
(+ index size -1))))
(uresult (c-bytevector-uint-ref c-bytevector index endness size)))
(display "High byte: ")
(display high-byte)
(newline)
(display "Uresult: ")
(display uresult)
(newline)
(if (> high-byte 127)
(- uresult (expt 256 size))
uresult)))
(- uresult (expt 256 size))
uresult)))
; FIXME: Some of these procedures may not do enough range checking.