Add `@(rodata)` attribute to `ENC_TABLE` and `DEC_TABLE` to mark
them as read-only data. This places these tables in the read-only
section of the executable, protecting them from modification
during program execution.
Fix incorrect RFC 4648 section references:
- Add RFC URL reference at package level
- Update Error enum documentation to reference correct sections:
- Invalid_Character: Section 3.3 (non-alphabet characters)
- Invalid_Length: Section 6 (base32 block size requirements)
- Malformed_Input: Section 3.2 (padding)
- Fix test file section references to match correct sections
This ensures all RFC references are accurate and adds a link to the
source RFC for reference.
Add defer delete for encoded strings across all test procedures to ensure
proper cleanup and prevent memory leaks. This completes the memory
management improvements started in 591dd876.
Add test case to verify custom alphabet support. The test uses a
decimal-uppercase alphabet (0-9, A-V) to test both encoding and decoding
with custom tables, including validation. This ensures the encode and
decode functions work correctly with custom encoding tables and
validation functions as documented.
Remove premature deallocation of the output buffer which was causing
use-after-free behavior. The returned string needs to take ownership
of this memory, but the defer delete was freeing it before the
string could be used. This fixes issues with encoding that were
introduced by overly aggressive memory cleanup in 93238db2.
Add test_base32_roundtrip() to verify the encode->decode roundtrip
preserves data integrity. This test helps ensure our base32 implementation
correctly handles the full encode->decode cycle without data loss or
corruption.
The decoding table was only 224 bytes which caused type mismatches when
using custom alphabets, so expand with zeroes to cover full byte range
while maintaining the same decoding logic.
Fix encoding to properly use provided encoding table parameter instead of
hardcoded `ENC_TABLE`.
This makes encode properly support custom alphabets as documented.
Add support for custom alphabet validation through an optional validation
function parameter. The default validation follows RFC 4648 base32
alphabet rules (A-Z, 2-7).
This properly supports the documented ability to use custom alphabets.
Replace package-level map with a simple switch statement for padding
validation. This eliminates allocations we can't properly free while
maintaining the same validation logic.
