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printk: Add padding support to string format specifiers

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The numeric format specifiers already have this support, but strings
didn't. This makes it possible to add padding after strings, using
format specifiers such as %-10s.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2017-11-14 14:11:42 +02:00 committed by Johan Hedberg
parent 75250f4747
commit 7d71c0656f
1 changed files with 8 additions and 0 deletions
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8
misc/printk.c
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@ -190,9 +190,17 @@ void _vprintk(out_func_t out, void *ctx, const char *fmt, va_list ap)
} }
case 's': { case 's': {
char *s = va_arg(ap, char *); char *s = va_arg(ap, char *);
char *start = s;
while (*s) while (*s)
out((int)(*s++), ctx); out((int)(*s++), ctx);
if (padding == PAD_SPACE_AFTER) {
int remaining = min_width - (s - start);
while (remaining-- > 0) {
out(' ', ctx);
}
}
break; break;
} }
case 'c': { case 'c': {