Fix sign handling when converting hex offsets to integer

[Copilot]

Converting a hex value to i only applied two's complement when the source was a Hex/HexUInt8 field of length >= 4. Offsetting a hex field returns an XString, so the sign bit was ignored:

DATA lv_hex TYPE x LENGTH 5 VALUE '00FFFFFFFF'.
DATA lv_int TYPE i.
lv_int = lv_hex+1.
ASSERT lv_int = -1.   " was 4294967295

Changes

• packages/runtime/src/types/integer.ts: set() now derives the byte length from the hex string itself instead of getLength(), so Hex, HexUInt8 and XString are treated uniformly. Values of 4 bytes or more are interpreted as two's complement; shorter values (e.g. lv_hex+1(2) → 65535) remain unsigned.
• test/types/integer.ts: cases for x LENGTH 4 = 'FFFFFFFF', the offset case above, and a 2-byte offset that must stay positive.

Note that Hex.getOffset() returning XString discards the original length, which is why the type-based check was insufficient.

• Fixes bug, converting hex to int #1401

[github-actions]

Regression test results:

Repository	Result	Runtime
abap-openapi/abap-openapi	🟢	12s
abapGit/abapGit	🟢	12s
heliconialabs/abap-opentelemetry	🟢	4s
heliconialabs/abap-protobuf	🟢	5s
larshp/abap-advent-2020	🟢	4s
larshp/abap-wasm	🟢	4s
larshp/abapNTLM	🟢	5s
larshp/abapPGP	🟢	89s
oisee/zork-abap	🟢	5s
open-abap/open-abap-core	🟢	4s
open-abap/open-abap-gui	🟢	5s
open-abap/open-abap-jobs	🟢	13s
open-abap/open-abap-lock	🟢	12s
open-abap/open-abap-odata	🟢	6s
open-abap/open-table-maintenance	🟢	11s
SAP/abap-file-formats-tools	🟢	12s
Sumu-Ning/AES	🟢	5s

Performance test results:

Performance	Before	After	Delta
1: APPEND and DELETE	486ms	490ms	4 🟢
2: READ TABLE, table_line	515ms	512ms	-3 🟢
3: LOOP USING KEY	525ms	515ms	-10 🟢
4: Copy, same sorting	114ms	114ms	0 🟢
5: Copy, becomes sorted	34ms	31ms	-3 🟢
6: INSERT INDEX 1	370ms	372ms	2 🟢
7: APPEND matching types	211ms	215ms	4 🟢
8: READ TABLE BINARY SEARCH	35ms	33ms	-2 🟢
9: INSERT INTO TABLE hashed	255ms	243ms	-12 🟢
10: DELETE ADJACENT	865ms	850ms	-15 🟢
11: READ WITH TABLE KEY HASHED	127ms	127ms	0 🟢
12: READ WITH KEY HASHED, primary	193ms	192ms	-1 🟢
13: INSERT INTO TABLE standard	21ms	20ms	-1 🟢
14: Constant characters	35ms	36ms	1 🟢
15: Compare characters	61ms	57ms	-4 🟢
16: Method number 5 🎶	401ms	388ms	-13 🟢
17: Substring and find negative	117ms	112ms	-5 🟢
18: CO compare	103ms	101ms	-2 🟢
19: Call method, compatible structure	54ms	55ms	1 🟢
20: Call method, identical structure	12ms	11ms	-1 🟢
21: CASE many char constants	167ms	168ms	1 🟢
22: READ TABLE WITH KEY secondary	26ms	29ms	3 🟢
23: CASE many int constants	172ms	171ms	-1 🟢
24: Copy table contents	129ms	131ms	2 🟢
25: READ TABLE, not found	13ms	13ms	0 🟢
26: REPLACE OCCURRENCES, simple	66ms	68ms	2 🟢
27: READ TABLE, building hash	40ms	40ms	0 🟢
28: CONCATENATE	1ms	1ms	0 🟢
29: Write Hex to Hex via offset	972ms	974ms	2 🟢
30: Get Hex from Hex via offset	5ms	6ms	1 🟢
31: SET BIT hex	532ms	529ms	-3 🟢
32: GET BIT hex	431ms	457ms	26 🟢
33: Compare Hex	371ms	383ms	12 🟢
34: Basic CONCATENATE	36ms	36ms	0 🟢
35: gt	193ms	192ms	-1 🟢
36: CLEAR char	130ms	131ms	1 🟢
37: CLEAR numc	121ms	123ms	2 🟢
38: Structure copy and APPEND	385ms	400ms	15 🟢
39: eq int	677ms	651ms	-26 🟢
40: eq string	601ms	596ms	-5 🟢
41: eq char, different lengths	94ms	96ms	2 🟢
42: eq int with numc	85ms	87ms	2 🟢

Updated: 2026-07-30T11:23:42.218Z

SHA: ce2e5e0