[PATCH v5 next 12/17] tools/nolibc/printf: Add support for conversion flags space and plus

[david.laight.linux@gmail.com]

From: David Laight <david.laight.linux@gmail.com>

Flags ' ' and '+' are sign characters for positive numbers.

Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: David Laight <david.laight.linux@gmail.com>
---

Unchanged for v5.

v4: Split from the previous patch and support for the # flag.

 tools/include/nolibc/stdio.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h
index 93fc24238661..8b003a9bd268 100644
--- a/tools/include/nolibc/stdio.h
+++ b/tools/include/nolibc/stdio.h
@@ -296,7 +296,7 @@ int fseek(FILE *stream, long offset, int whence)
  *  - %% generates a single %
  *  - %m outputs strerror(errno).
  *  - %X outputs a..f the same as %x.
- *  - The modifiers [#-+ 0] are currently ignored.
+ *  - The modifiers [#-0] are currently ignored.
  *  - No support for precision or variable widths.
  *  - No support for floating point or wide characters.
  *  - Invalid formats are copied to the output buffer.
@@ -458,6 +458,10 @@ int __nolibc_printf(__nolibc_printf_cb cb, void *state, const char *fmt, va_list
 					sign_prefix = '-';
 					v = -(signed_v + 1);
 					v++;
+				} else if (_NOLIBC_PF_FLAGS_CONTAIN(flags, '+')) {
+					sign_prefix = '+';
+				} else if (_NOLIBC_PF_FLAGS_CONTAIN(flags, ' ')) {
+					sign_prefix = ' ';
 				}
 			}
 
-- 
2.39.5