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float_spec -> float_specs

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This commit is contained in:
Victor Zverovich
2019-11-26 15:52:56 -08:00
parent 9a21728b0a
commit c68703c9f4
4 changed files with 74 additions and 69 deletions
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100
include/fmt/format.h
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@@ -1062,24 +1062,24 @@ using format_specs = basic_format_specs<char>;
namespace internal {
// A floating-point presentation format.
enum class float_format {
enum class float_format : unsigned char {
general, // General: exponent notation or fixed point based on magnitude.
exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3.
fixed, // Fixed point with the default precision of 6, e.g. 0.0012.
hex
};
struct float_spec {
struct float_specs {
int precision;
float_format format;
sign_t sign : 3;
bool upper;
bool locale;
bool percent;
bool alt;
bool binary32;
bool use_grisu;
bool trailing_zeros;
float_format format : 8;
sign_t sign : 8;
bool upper : 1;
bool locale : 1;
bool percent : 1;
bool alt : 1;
bool binary32 : 1;
bool use_grisu : 1;
bool trailing_zeros : 1;
};
// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
@@ -1110,7 +1110,7 @@ template <typename Char> class float_writer {
int num_digits_;
int exp_;
size_t size_;
float_spec params_;
float_specs params_;
Char decimal_point_;
template <typename It> It prettify(It it) const {
@@ -1182,21 +1182,21 @@ template <typename Char> class float_writer {
}
public:
float_writer(const char* digits, int num_digits, int exp, float_spec spec,
float_writer(const char* digits, int num_digits, int exp, float_specs specs,
Char decimal_point)
: digits_(digits),
num_digits_(num_digits),
exp_(exp),
params_(spec),
params_(specs),
decimal_point_(decimal_point) {
int full_exp = num_digits + exp - 1;
int precision = spec.precision > 0 ? spec.precision : 16;
int precision = specs.precision > 0 ? specs.precision : 16;
if (params_.format == float_format::general &&
!(full_exp >= -4 && full_exp < precision)) {
params_.format = float_format::exp;
}
size_ = prettify(counting_iterator()).count();
size_ += spec.sign ? 1 : 0;
size_ += specs.sign ? 1 : 0;
}
size_t size() const { return size_; }
@@ -1209,11 +1209,12 @@ template <typename Char> class float_writer {
};
template <typename T>
int format_float(T value, int precision, float_spec spec, buffer<char>& buf);
int format_float(T value, int precision, float_specs specs, buffer<char>& buf);
// Formats a floating-point number with snprintf.
template <typename T>
int snprintf_float(T value, int precision, float_spec spec, buffer<char>& buf);
int snprintf_float(T value, int precision, float_specs specs,
buffer<char>& buf);
template <typename T> T promote_float(T value) { return value; }
inline double promote_float(float value) { return value; }
@@ -1245,9 +1246,9 @@ FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler&& handler) {
}
template <typename ErrorHandler = error_handler>
FMT_CONSTEXPR float_spec parse_float_type_spec(char spec,
ErrorHandler&& eh = {}) {
auto result = float_spec();
FMT_CONSTEXPR float_specs parse_float_type_spec(char spec,
ErrorHandler&& eh = {}) {
auto result = float_specs();
switch (spec) {
case 'G':
result.upper = true;
@@ -1690,62 +1691,63 @@ template <typename Range> class basic_writer {
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
void write(T value, format_specs specs = {}) {
float_spec fspec = parse_float_type_spec(specs.type);
fspec.sign = specs.sign;
float_specs fspecs = parse_float_type_spec(specs.type);
fspecs.sign = specs.sign;
if (std::signbit(value)) { // value < 0 is false for NaN so use signbit.
fspec.sign = sign::minus;
fspecs.sign = sign::minus;
value = -value;
} else if (fspec.sign == sign::minus) {
fspec.sign = sign::none;
} else if (fspecs.sign == sign::minus) {
fspecs.sign = sign::none;
}
if (!std::isfinite(value)) {
auto str = std::isinf(value) ? (fspec.upper ? "INF" : "inf")
: (fspec.upper ? "NAN" : "nan");
return write_padded(specs, inf_or_nan_writer<char_type>{fspec.sign, str});
auto str = std::isinf(value) ? (fspecs.upper ? "INF" : "inf")
: (fspecs.upper ? "NAN" : "nan");
return write_padded(specs,
inf_or_nan_writer<char_type>{fspecs.sign, str});
}
if (specs.align == align::none) {
specs.align = align::right;
} else if (specs.align == align::numeric) {
if (fspec.sign) {
if (fspecs.sign) {
auto&& it = reserve(1);
*it++ = static_cast<char_type>(data::signs[fspec.sign]);
fspec.sign = sign::none;
*it++ = static_cast<char_type>(data::signs[fspecs.sign]);
fspecs.sign = sign::none;
if (specs.width != 0) --specs.width;
}
specs.align = align::right;
}
memory_buffer buffer;
if (fspec.format == float_format::hex) {
if (fspec.sign) buffer.push_back(data::signs[fspec.sign]);
fspec.alt = specs.alt;
snprintf_float(promote_float(value), specs.precision, fspec, buffer);
if (fspecs.format == float_format::hex) {
if (fspecs.sign) buffer.push_back(data::signs[fspecs.sign]);
fspecs.alt = specs.alt;
snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
write_padded(specs, str_writer<char>{buffer.data(), buffer.size()});
return;
}
int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6;
if (fspec.format == float_format::exp) ++precision;
fspec.trailing_zeros =
if (fspecs.format == float_format::exp) ++precision;
fspecs.trailing_zeros =
(precision != 0 &&
(!specs.type || fspec.format == float_format::fixed ||
fspec.format == float_format::exp)) ||
(!specs.type || fspecs.format == float_format::fixed ||
fspecs.format == float_format::exp)) ||
specs.alt;
if (const_check(std::is_same<T, float>())) fspec.binary32 = true;
fspec.use_grisu = use_grisu<T>();
if (const_check(FMT_DEPRECATED_PERCENT) && fspec.percent) value *= 100;
int exp = format_float(promote_float(value), precision, fspec, buffer);
if (const_check(FMT_DEPRECATED_PERCENT) && fspec.percent) {
if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
fspecs.use_grisu = use_grisu<T>();
if (const_check(FMT_DEPRECATED_PERCENT) && fspecs.percent) value *= 100;
int exp = format_float(promote_float(value), precision, fspecs, buffer);
if (const_check(FMT_DEPRECATED_PERCENT) && fspecs.percent) {
buffer.push_back('%');
--exp; // Adjust decimal place position.
}
fspec.precision = precision;
char_type point = fspec.locale ? decimal_point<char_type>(locale_)
: static_cast<char_type>('.');
fspecs.precision = precision;
char_type point = fspecs.locale ? decimal_point<char_type>(locale_)
: static_cast<char_type>('.');
write_padded(specs, float_writer<char_type>(buffer.data(),
static_cast<int>(buffer.size()),
exp, fspec, point));
exp, fspecs, point));
}
void write(char value) {