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Move basic_writer::write_fp to where it belongs

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This commit is contained in:
Victor Zverovich 2019-11-20 08:22:34 -08:00
parent 404a880bd4
commit 4de41aa655
1 changed files with 72 additions and 75 deletions
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147
include/fmt/format.h
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@ -1820,6 +1820,78 @@ template <typename Range> class basic_writer {
}
};
template <typename Range>
template <typename T, bool USE_GRISU>
void basic_writer<Range>::write_fp(T value, const format_specs& specs) {
auto sign = specs.sign;
if (std::signbit(value)) { // value < 0 is false for NaN so use signbit.
sign = sign::minus;
value = -value;
} else if (sign == sign::minus) {
sign = sign::none;
}
float_spec fspec = parse_float_type_spec(specs.type);
if (!std::isfinite(value)) {
const char* str = std::isinf(value) ? (fspec.upper ? "INF" : "inf")
: (fspec.upper ? "NAN" : "nan");
return write_padded(specs, inf_or_nan_writer{sign, fspec.percent, str});
}
if (fspec.percent) value *= 100;
memory_buffer buffer;
int exp = 0;
int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6;
int num_digits =
fspec.format == float_format::exp ? precision + 1 : precision;
unsigned options = 0;
if (fspec.format == float_format::fixed) options |= grisu_options::fixed;
if (const_check(sizeof(value) == sizeof(float)))
options |= grisu_options::binary32;
bool use_grisu = USE_GRISU && (specs.type != 'a' && specs.type != 'A') &&
grisu_format(static_cast<double>(value), buffer, num_digits,
options, exp);
char* decimal_point_pos = nullptr;
if (!use_grisu) decimal_point_pos = sprintf_format(value, buffer, specs);
if (fspec.percent) {
buffer.push_back('%');
--exp; // Adjust decimal place position.
}
format_specs as = specs;
if (specs.align == align::numeric) {
if (sign) {
auto&& it = reserve(1);
*it++ = static_cast<char_type>(data::signs[sign]);
sign = sign::none;
if (as.width) --as.width;
}
as.align = align::right;
} else if (specs.align == align::none) {
as.align = align::right;
}
char_type point = fspec.locale ? decimal_point<char_type>(locale_)
: static_cast<char_type>('.');
if (use_grisu) {
auto params = gen_digits_params();
params.sign = sign;
params.format = fspec.format;
params.num_digits = num_digits;
params.trailing_zeros =
(precision != 0 &&
(!specs.type || fspec.format == float_format::fixed ||
fspec.format == float_format::exp)) ||
specs.alt;
params.upper = fspec.upper;
num_digits = static_cast<int>(buffer.size());
write_padded(as, grisu_writer<char_type>(buffer.data(), num_digits, exp,
params, point));
} else {
write_padded(as, double_writer{sign, buffer, decimal_point_pos, point});
}
}
using writer = basic_writer<buffer_range<char>>;
template <typename T> struct is_integral : std::is_integral<T> {};
@ -2811,81 +2883,6 @@ class FMT_API system_error : public std::runtime_error {
FMT_API void format_system_error(internal::buffer<char>& out, int error_code,
string_view message) FMT_NOEXCEPT;
template <typename Range>
template <typename T, bool USE_GRISU>
void internal::basic_writer<Range>::write_fp(T value,
const format_specs& specs) {
auto sign = specs.sign;
if (std::signbit(value)) { // value < 0 is false for NaN so use signbit.
sign = sign::minus;
value = -value;
} else if (sign == sign::minus) {
sign = sign::none;
}
float_spec fspec = parse_float_type_spec(specs.type);
if (!std::isfinite(value)) {
const char* str = std::isinf(value) ? (fspec.upper ? "INF" : "inf")
: (fspec.upper ? "NAN" : "nan");
return write_padded(specs, inf_or_nan_writer{sign, fspec.percent, str});
}
if (fspec.percent) value *= 100;
memory_buffer buffer;
int exp = 0;
int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6;
int num_digits =
fspec.format == float_format::exp ? precision + 1 : precision;
unsigned options = 0;
if (fspec.format == float_format::fixed) options |= grisu_options::fixed;
if (const_check(sizeof(value) == sizeof(float)))
options |= grisu_options::binary32;
bool use_grisu = USE_GRISU && (specs.type != 'a' && specs.type != 'A') &&
grisu_format(static_cast<double>(value), buffer, num_digits,
options, exp);
char* decimal_point_pos = nullptr;
if (!use_grisu) decimal_point_pos = sprintf_format(value, buffer, specs);
if (fspec.percent) {
buffer.push_back('%');
--exp; // Adjust decimal place position.
}
format_specs as = specs;
if (specs.align == align::numeric) {
if (sign) {
auto&& it = reserve(1);
*it++ = static_cast<char_type>(data::signs[sign]);
sign = sign::none;
if (as.width) --as.width;
}
as.align = align::right;
} else if (specs.align == align::none) {
as.align = align::right;
}
char_type decimal_point = fspec.locale
? internal::decimal_point<char_type>(locale_)
: static_cast<char_type>('.');
if (use_grisu) {
auto params = gen_digits_params();
params.sign = sign;
params.format = fspec.format;
params.num_digits = num_digits;
params.trailing_zeros =
(precision != 0 &&
(!specs.type || fspec.format == float_format::fixed ||
fspec.format == float_format::exp)) ||
specs.alt;
params.upper = fspec.upper;
num_digits = static_cast<int>(buffer.size());
write_padded(as, grisu_writer<char_type>(buffer.data(), num_digits, exp,
params, decimal_point));
} else {
write_padded(as,
double_writer{sign, buffer, decimal_point_pos, decimal_point});
}
}
// Reports a system error without throwing an exception.
// Can be used to report errors from destructors.
FMT_API void report_system_error(int error_code,