Daisuke Nojiri d3d6814b2d printf: Add sign ('+') flag ...

'+' flag can be used with signed integer type (%d) and causes positive
integers to be prefixed with '+' (e.g. +1745). This emphasizes output
values as a signed value. It can be mixed with left-justification flag
'-': %-+8d. It's ignored when used with unsigned integer or non-integer
types: %u, %x, %p, %s, %c, etc.

BUG=none
BRANCH=none
TEST=make buildall &&
int32_t d = 1745;
CPRINTS("'%-+8d'", -d);     /* '-1745    ' */
CPRINTS("'%-+8d'", d);      /* '+1745    ' */
CPRINTS("'%d'", d);         /* '1745' */
CPRINTS("'%+08d'", -d);     /* '000-1745' */
CPRINTS("'%+08d'", d);      /* '000+1745' */
CPRINTS("'%+d'", -d);       /* '-1745' */
CPRINTS("'%+d'", d);        /* '+1745' */
CPRINTS("'%+s'", "foo");    /* 'foo' */
CPRINTS("'%-+8s'", "foo");  /* 'foo     ' */
CPRINTS("'%+08x'", d);      /* '000006d1' */
CPRINTS("'%+u'", d);        /* '1745' */

Change-Id: I8dcd34b0cf03dbefc500b9c98fea235d85bde8d3
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/363924

2016-07-29 10:51:22 -07:00

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