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authorDavid Laight <david.laight.linux@gmail.com>2026-03-08 14:37:39 +0300
committerThomas Weißschuh <linux@weissschuh.net>2026-03-20 19:57:21 +0300
commitb5f3f59cf4384a8c9e60fa4bb1a8f4ad71126a90 (patch)
treeda6de1da2149dec95ed6e5db75fb935d6e283bc5 /tools/include
parent5eae5f1a01aff6f9773547265167d7a680c6fbc3 (diff)
downloadlinux-b5f3f59cf4384a8c9e60fa4bb1a8f4ad71126a90.tar.xz
tools/nolibc/printf: Add support for left aligning fields
Output the characters before or after the pad - writing the pad takes more code. Include additional/changed tests Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-15-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/nolibc/stdio.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h
index db714b1ce274..c8a463ed73c7 100644
--- a/tools/include/nolibc/stdio.h
+++ b/tools/include/nolibc/stdio.h
@@ -545,7 +545,11 @@ do_output:
/* Stop gcc back-merging this code into one of the conditionals above. */
_NOLIBC_OPTIMIZER_HIDE_VAR(len);
+ /* Output the characters on the required side of any padding. */
width -= len;
+ flags = _NOLIBC_PF_FLAGS_CONTAIN(flags, '-');
+ if (flags && cb(state, outstr, len) != 0)
+ return -1;
while (width > 0) {
/* Output pad in 16 byte blocks with the small block first. */
int pad_len = ((width - 1) & 15) + 1;
@@ -554,7 +558,7 @@ do_output:
if (cb(state, " ", pad_len) != 0)
return -1;
}
- if (cb(state, outstr, len) != 0)
+ if (!flags && cb(state, outstr, len) != 0)
return -1;
}