openwrtv4/toolchain/musl/patches/028-fix-printf-regression-with-alt-form-octal-zero-flag-and-field-width.patch
Koen Vandeputte 2912f9f2a2 musl: backport various post-1.1.15 fixes
Backport most important fixes up to latest HEAD

- Taken post-commit reverts/fixes into account

Compile tested
Run-tested on cns3xxx & imx6 targets

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2016-12-26 11:17:33 +01:00

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1.1 KiB
Diff

From 78897b0dc00b7cd5c29af5e0b7eebf2396d8dce0 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Fri, 16 Sep 2016 17:40:08 -0400
Subject: fix printf regression with alt-form octal, zero flag, and field width
commit b91cdbe2bc8b626aa04dc6e3e84345accf34e4b1, in fixing another
issue, changed the logic for how alt-form octal adds the leading zero
to adjust the precision rather than using a prefix character. this
wrongly suppressed the zero flag by mimicing an explicit precision
given by the format string. switch back to using a prefix character.
based on bug report and patch by Dmitry V. Levin, but simplified.
---
src/stdio/vfprintf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 2ecf769..e439a07 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -570,7 +570,7 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
if (0) {
case 'o':
a = fmt_o(arg.i, z);
- if ((fl&ALT_FORM) && p<z-a+1) p=z-a+1;
+ if ((fl&ALT_FORM) && p<z-a+1) prefix+=5, pl=1;
} if (0) {
case 'd': case 'i':
pl=1;
--
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