FA-3619 / Binary formats / Member archive
A sign-magnitude octet is decoded as two-complement · case 04
A sign-magnitude octet is decoded as two-complement.
Case contract
Decode high-bit sign and seven-bit magnitude, with either zero representation mapping to zero.
Why this case matters
A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| boundary 1 | -127 | -1 | Failed |
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