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util/nvmutil: tidy up rhex

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Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-03 15:43:11 +00:00
parent 403fd260b5
commit 572b7758cf
1 changed files with 8 additions and 3 deletions
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util/nvmutil/nvmutil.c
+8 -3
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@@ -340,9 +340,14 @@ hextonum(char ch)
static uint8_t static uint8_t
rhex(void) rhex(void)
{ {
static uint8_t n = 0, rnum[12]; static uint8_t n = 0;
if (!n) static uint8_t rnum[12];
err_if(read(rfd, (uint8_t *) &rnum, (n = 11) + 1) == -1);
if (!n) {
n = sizeof(rnum) - 1;
err_if(read(rfd, (uint8_t *) &rnum, n + 1) == -1);
}
return rnum[n--] & 0xf; return rnum[n--] & 0xf;
} }