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lib/vsprintf.c: "%#o",0 becomes '0' instead of '00'

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number()'s behaviour is slighly changed: 0 becomes "0" instead of "00"
when using the flag SPECIAL and base 8.

Before:
Number\Format  %o    %#o  %x    %#x
            0     0   00    0   0x0
            1     1   01    1   0x1
           16    20  020   10  0x10

After:
Number\Format  %o    %#o  %x    %#x
            0     0    0    0   0x0
            1     1   01    1   0x1
           16    20  020   10  0x10

Signed-off-by: Pierre Carrier <pierre@spotify.com>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pierre Carrier 2012-05-29 15:07:35 -07:00 committed by Linus Torvalds
parent 5536805292
commit 7c20342230
1 changed files with 8 additions and 4 deletions
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12
lib/vsprintf.c
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@ -284,6 +284,7 @@ char *number(char *buf, char *end, unsigned long long num,
char locase;
int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10);
int i;
bool is_zero = num == 0LL;
/* locase = 0 or 0x20. ORing digits or letters with 'locase'
* produces same digits or (maybe lowercased) letters */
@ -305,8 +306,9 @@ char *number(char *buf, char *end, unsigned long long num,
}
}
if (need_pfx) {
spec.field_width--;
if (spec.base == 16)
spec.field_width -= 2;
else if (!is_zero)
spec.field_width--;
}
@ -353,9 +355,11 @@ char *number(char *buf, char *end, unsigned long long num,
}
/* "0x" / "0" prefix */
if (need_pfx) {
if (buf < end)
*buf = '0';
++buf;
if (spec.base == 16 || !is_zero) {
if (buf < end)
*buf = '0';
++buf;
}
if (spec.base == 16) {
if (buf < end)
*buf = ('X' | locase);