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Apply patch #10406: simplify sign extension

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This commit is contained in:
Oswin Bult
2025-03-21 18:48:50 +03:00
committed by Mike Kleshov
parent ffce5ab1c7
commit 8459488006
1 changed files with 2 additions and 8 deletions
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10
src/apps/snmp/snmp_asn1.c
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@@ -463,14 +463,8 @@ snmp_asn1_dec_s32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, s32_t *value
if ((len > 0) && (len < 5)) { if ((len > 0) && (len < 5)) {
PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data));
if (data & 0x80) { /* sign extension */
/* negative, start from -1 */ *value = (s8_t)data;
*value = -1;
*value = (*value << 8) | data;
} else {
/* positive, start from 0 */
*value = data;
}
len--; len--;
/* shift in the remaining value */ /* shift in the remaining value */
while (len > 0) { while (len > 0) {