| 1 | This patch fixes a bug into ostream::operator<<(double) due to the wrong size |
| 2 | passed into the __convert_from_v method. The wrong size is then passed to |
| 3 | std::snprintf function, that, on uClibc, doens't handle sized 0 buffer. |
| 4 | |
| 5 | Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com> |
| 6 | |
| 7 | --- a/libstdc++-v3/include/bits/locale_facets.tcc |
| 8 | +++ b/libstdc++-v3/include/bits/locale_facets.tcc |
| 9 | @@ -1149,7 +1149,7 @@ _GLIBCXX_BEGIN_LDBL_NAMESPACE |
| 10 | const int __cs_size = __fixed ? __max_exp + __prec + 4 |
| 11 | : __max_digits * 2 + __prec; |
| 12 | char* __cs = static_cast<char*>(__builtin_alloca(__cs_size)); |
| 13 | - __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, __fbuf, |
| 14 | + __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size, __fbuf, |
| 15 | __prec, __v); |
| 16 | #endif |
| 17 | |
| 18 | @@ -1789,7 +1789,7 @@ _GLIBCXX_BEGIN_LDBL_NAMESPACE |
| 19 | // max_exponent10 + 1 for the integer part, + 2 for sign and '\0'. |
| 20 | const int __cs_size = numeric_limits<long double>::max_exponent10 + 3; |
| 21 | char* __cs = static_cast<char*>(__builtin_alloca(__cs_size)); |
| 22 | - int __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, "%.*Lf", |
| 23 | + int __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size, "%.*Lf", |
| 24 | 0, __units); |
| 25 | #endif |
| 26 | string_type __digits(__len, char_type()); |
| 27 | |
