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lib/vsprintf.c: Amend static asserts for format specifier flags

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There are couple of improvements to static asserts against
the format specifier flags:

- new static assert for SIGN
- fix static assert for SMALL

SMALL is not equal to ASCII code of white space, it equals to
the bit difference between capital and small letters (however
the value is the same, semantically expression means different
things).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20211026140356.45610-1-andriy.shevchenko@linux.intel.com
This commit is contained in:
Andy Shevchenko 2021-10-26 17:03:56 +03:00 committed by Petr Mladek
parent c15b5fc054
commit 24a1dffbec
1 changed files with 2 additions and 1 deletions
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lib/vsprintf.c
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@ -408,8 +408,9 @@ int num_to_str(char *buf, int size, unsigned long long num, unsigned int width)
#define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */
#define SPECIAL 64 /* prefix hex with "0x", octal with "0" */
static_assert(SIGN == 1);
static_assert(ZEROPAD == ('0' - ' '));
static_assert(SMALL == ' ');
static_assert(SMALL == ('a' ^ 'A'));
enum format_type {
FORMAT_TYPE_NONE, /* Just a string part */