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| -rw-r--r-- | lib/test_printf.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/test_printf.c b/lib/test_printf.c index 3393d667c6b8..b23ce824766f 100644 --- a/lib/test_printf.c +++ b/lib/test_printf.c @@ -158,6 +158,30 @@ test_number(void) test("0x1234abcd ", "%#-12x", 0x1234abcd); test(" 0x1234abcd", "%#12x", 0x1234abcd); test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234); + test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1); + test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1); + test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627); + /* + * POSIX/C99: »The result of converting zero with an explicit + * precision of zero shall be no characters.« Hence the output + * from the below test should really be "00|0||| ". However, + * the kernel's printf also produces a single 0 in that + * case. This test case simply documents the current + * behaviour. + */ + test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0); +#ifndef __CHAR_UNSIGNED__ + { + /* + * Passing a 'char' to a %02x specifier doesn't do + * what was presumably the intention when char is + * signed and the value is negative. One must either & + * with 0xff or cast to u8. + */ + char val = -16; + test("0xfffffff0|0xf0|0xf0", "%#02x|%#02x|%#02x", val, val & 0xff, (u8)val); + } +#endif } static void __init |