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read_key(): placate "warning: shifting a negative signed value is undefined"

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-10-25 17:40:57 +02:00
parent d6ff27de15
commit f39a71817e
1 changed files with 2 additions and 1 deletions
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3
libbb/read_key.c
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@ -259,7 +259,8 @@ int64_t FAST_FUNC read_key(int fd, char *buffer, int timeout)
buffer[-1] = 0;
/* Pack into "1 <row15bits> <col16bits>" 32-bit sequence */
col |= (((-1 << 15) | row) << 16);
row |= ((unsigned)(-1) << 15);
col |= (row << 16);
/* Return it in high-order word */
return ((int64_t) col << 32) | (uint32_t)KEYCODE_CURSOR_POS;
}