diff options
Diffstat (limited to 'newlib/libc/stdio/vfprintf.c')
| -rw-r--r-- | newlib/libc/stdio/vfprintf.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/newlib/libc/stdio/vfprintf.c b/newlib/libc/stdio/vfprintf.c index eec0b5378..f9c1ddf3f 100644 --- a/newlib/libc/stdio/vfprintf.c +++ b/newlib/libc/stdio/vfprintf.c @@ -879,7 +879,12 @@ reswitch: switch (ch) { _fpvalue = GET_ARG (N, ap, double); } - /* do this before tricky precision changes */ + /* do this before tricky precision changes + + If the output is infinite or NaN, leading + zeros are not permitted. Otherwise, scanf + could not read what printf wrote. + */ if (isinf (_fpvalue)) { if (_fpvalue < 0) sign = '-'; @@ -888,6 +893,7 @@ reswitch: switch (ch) { else cp = "inf"; size = 3; + flags &= ~ZEROPAD; break; } if (isnan (_fpvalue)) { @@ -896,11 +902,12 @@ reswitch: switch (ch) { else cp = "nan"; size = 3; + flags &= ~ZEROPAD; break; } #else /* !_NO_LONGDBL */ - + if (flags & LONGDBL) { _fpvalue = GET_ARG (N, ap, _LONG_DOUBLE); } else { @@ -917,6 +924,7 @@ reswitch: switch (ch) { else cp = "inf"; size = 3; + flags &= ~ZEROPAD; break; } if (tmp == 1) { @@ -925,6 +933,7 @@ reswitch: switch (ch) { else cp = "nan"; size = 3; + flags &= ~ZEROPAD; break; } #endif /* !_NO_LONGDBL */ |