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| author | Damien George <damien.p.george@gmail.com> | 2018-03-01 17:00:02 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2018-03-01 17:00:02 +1100 |
| commit | 955ee6477f4b1d3a70bfe97a1e7727848bf2d06d (patch) | |
| tree | 195d1942743e669f25c77874e1bf69bf49ab6781 /py/formatfloat.c | |
| parent | 7b050fa76c6a763043739d40c82dde839d7f8fd9 (diff) | |
| download | micropython-955ee6477f4b1d3a70bfe97a1e7727848bf2d06d.tar.gz micropython-955ee6477f4b1d3a70bfe97a1e7727848bf2d06d.zip | |
py/formatfloat: Fix case where floats could render with negative digits.
Prior to this patch, some architectures (eg unix x86) could render floats
with "negative" digits, like ")". For example, '%.23e' % 1e-80 would come
out as "1.0000000000000000/)/(,*0e-80". This patch fixes the known cases.
Diffstat (limited to 'py/formatfloat.c')
| -rw-r--r-- | py/formatfloat.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/py/formatfloat.c b/py/formatfloat.c index 60dcee6f54..dc7fc1d1fd 100644 --- a/py/formatfloat.c +++ b/py/formatfloat.c @@ -330,7 +330,11 @@ int mp_format_float(FPTYPE f, char *buf, size_t buf_size, char fmt, int prec, ch // Print the digits of the mantissa for (int i = 0; i < num_digits; ++i, --dec) { int32_t d = (int32_t)f; - *s++ = '0' + d; + if (d < 0) { + *s++ = '0'; + } else { + *s++ = '0' + d; + } if (dec == 0 && prec > 0) { *s++ = '.'; } |