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Improve binary size
This commit is contained in:
Victor Zverovich
parent
2a2f73f7c1
commit
8e3da9da2c
@ -1343,31 +1343,39 @@ FMT_CONSTEXPR auto format_decimal(OutputIt out, UInt value, int num_digits)
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return detail::copy_noinline<Char>(buffer, buffer + num_digits, out);
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}
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template <unsigned BASE_BITS, typename Char, typename UInt>
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FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
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bool upper = false) -> Char* {
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buffer += num_digits;
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Char* end = buffer;
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template <typename Char, typename UInt>
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FMT_CONSTEXPR auto do_format_base2e(int base_bits, Char* out, UInt value,
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int size, bool upper = false) -> Char* {
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out += size;
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do {
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const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
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unsigned digit = static_cast<unsigned>(value & ((1 << BASE_BITS) - 1));
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*--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
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unsigned digit = static_cast<unsigned>(value & ((1 << base_bits) - 1));
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*--out = static_cast<Char>(base_bits < 4 ? static_cast<char>('0' + digit)
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: digits[digit]);
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} while ((value >>= BASE_BITS) != 0);
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return end;
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}
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template <unsigned BASE_BITS, typename Char, typename OutputIt, typename UInt,
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FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value)>
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FMT_CONSTEXPR inline auto format_uint(OutputIt out, UInt value, int num_digits,
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bool upper = false) -> OutputIt {
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if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
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format_uint<BASE_BITS>(ptr, value, num_digits, upper);
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} while ((value >>= base_bits) != 0);
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return out;
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}
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// Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
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char buffer[num_bits<UInt>() / BASE_BITS + 1] = {};
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format_uint<BASE_BITS>(buffer, value, num_digits, upper);
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// Formats an unsigned integer in the power of two base (binary, octal, hex).
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template <typename Char, typename UInt>
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FMT_CONSTEXPR auto format_base2e(int base_bits, Char* out, UInt value,
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int num_digits, bool upper = false) -> Char* {
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do_format_base2e(base_bits, out, value, num_digits, upper);
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return out + num_digits;
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}
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template <typename Char, typename OutputIt, typename UInt,
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FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value)>
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FMT_CONSTEXPR inline auto format_base2e(int base_bits, OutputIt out, UInt value,
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int num_digits, bool upper = false)
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-> OutputIt {
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if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
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format_base2e(base_bits, ptr, value, num_digits, upper);
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return out;
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}
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// Make buffer large enough for any base.
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char buffer[num_bits<UInt>()] = {};
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format_base2e(base_bits, buffer, value, num_digits, upper);
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return detail::copy_noinline<Char>(buffer, buffer + num_digits, out);
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}
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@ -1785,7 +1793,7 @@ auto write_ptr(OutputIt out, UIntPtr value, const format_specs* specs)
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auto write = [=](reserve_iterator<OutputIt> it) {
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*it++ = static_cast<Char>('0');
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*it++ = static_cast<Char>('x');
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return format_uint<4, Char>(it, value, num_digits);
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return format_base2e<Char>(4, it, value, num_digits);
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};
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return specs ? write_padded<Char, align::right>(out, *specs, size, write)
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: base_iterator(out, write(reserve(out, size)));
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@ -1861,7 +1869,7 @@ auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt {
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*out++ = static_cast<Char>(prefix);
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Char buf[width];
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fill_n(buf, width, static_cast<Char>('0'));
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format_uint<4>(buf, cp, width);
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format_base2e(4, buf, cp, width);
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return copy<Char>(buf, buf + width, out);
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}
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@ -1981,32 +1989,6 @@ template <typename Char> struct write_int_data {
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}
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};
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// Writes an integer in the format
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// <left-padding><prefix><numeric-padding><digits><right-padding>
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// where <digits> are written by write_digits(it).
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// prefix contains chars in three lower bytes and the size in the fourth byte.
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template <typename Char, typename OutputIt, typename W>
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FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
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unsigned prefix,
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const format_specs& specs,
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W write_digits) -> OutputIt {
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// Slightly faster check for specs.width == 0 && specs.precision == -1.
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if ((specs.width | (specs.precision + 1)) == 0) {
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auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
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for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
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*it++ = static_cast<Char>(p & 0xff);
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return base_iterator(out, write_digits(it));
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}
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auto data = write_int_data<Char>(num_digits, prefix, specs);
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return write_padded<Char, align::right>(
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out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
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for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
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*it++ = static_cast<Char>(p & 0xff);
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it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
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return write_digits(it);
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});
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}
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template <typename Char> class digit_grouping {
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private:
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std::string grouping_;
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@ -2097,7 +2079,7 @@ auto write_int(OutputIt out, UInt value, unsigned prefix,
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if (specs.alt())
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prefix_append(prefix, unsigned(specs.upper() ? 'X' : 'x') << 8 | '0');
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num_digits = count_digits<4>(value);
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format_uint<4, char>(appender(buffer), value, num_digits, specs.upper());
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format_base2e<char>(4, appender(buffer), value, num_digits, specs.upper());
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break;
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case presentation_type::oct:
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num_digits = count_digits<3>(value);
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@ -2105,13 +2087,13 @@ auto write_int(OutputIt out, UInt value, unsigned prefix,
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// is not greater than the number of digits.
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if (specs.alt() && specs.precision <= num_digits && value != 0)
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prefix_append(prefix, '0');
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format_uint<3, char>(appender(buffer), value, num_digits);
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format_base2e<char>(3, appender(buffer), value, num_digits);
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break;
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case presentation_type::bin:
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if (specs.alt())
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prefix_append(prefix, unsigned(specs.upper() ? 'B' : 'b') << 8 | '0');
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num_digits = count_digits<1>(value);
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format_uint<1, char>(appender(buffer), value, num_digits);
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format_base2e<char>(1, appender(buffer), value, num_digits);
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break;
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case presentation_type::chr:
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return write_char<Char>(out, static_cast<Char>(value), specs);
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@ -2184,6 +2166,12 @@ template <typename Char, typename OutputIt, typename T>
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FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
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const format_specs& specs) -> OutputIt {
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static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
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constexpr int buffer_size = num_bits<T>();
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char buffer[buffer_size] = {};
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const char* begin = nullptr;
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const char* end = buffer + buffer_size;
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auto abs_value = arg.abs_value;
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auto prefix = arg.prefix;
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switch (specs.type()) {
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@ -2191,46 +2179,53 @@ FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
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FMT_ASSERT(false, "");
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FMT_FALLTHROUGH;
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case presentation_type::none:
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case presentation_type::dec: {
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int num_digits = count_digits(abs_value);
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return write_int<Char>(
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out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
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return format_decimal<Char>(it, abs_value, num_digits);
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});
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}
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case presentation_type::hex: {
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case presentation_type::dec:
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begin = do_format_decimal(buffer, abs_value, buffer_size);
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break;
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case presentation_type::hex:
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begin = do_format_base2e(4, buffer, abs_value, buffer_size, specs.upper());
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if (specs.alt())
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prefix_append(prefix, unsigned(specs.upper() ? 'X' : 'x') << 8 | '0');
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int num_digits = count_digits<4>(abs_value);
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return write_int<Char>(
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out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
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return format_uint<4, Char>(it, abs_value, num_digits, specs.upper());
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});
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}
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break;
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case presentation_type::oct: {
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int num_digits = count_digits<3>(abs_value);
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begin = do_format_base2e(3, buffer, abs_value, buffer_size);
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// Octal prefix '0' is counted as a digit, so only add it if precision
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// is not greater than the number of digits.
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auto num_digits = end - begin;
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if (specs.alt() && specs.precision <= num_digits && abs_value != 0)
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prefix_append(prefix, '0');
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return write_int<Char>(
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out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
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return format_uint<3, Char>(it, abs_value, num_digits);
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});
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break;
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}
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case presentation_type::bin: {
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case presentation_type::bin:
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begin = do_format_base2e(1, buffer, abs_value, buffer_size);
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if (specs.alt())
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prefix_append(prefix, unsigned(specs.upper() ? 'B' : 'b') << 8 | '0');
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int num_digits = count_digits<1>(abs_value);
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return write_int<Char>(
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out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
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return format_uint<1, Char>(it, abs_value, num_digits);
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});
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}
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break;
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case presentation_type::chr:
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return write_char<Char>(out, static_cast<Char>(abs_value), specs);
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}
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// Write an integer in the format
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// <left-padding><prefix><numeric-padding><digits><right-padding>
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// prefix contains chars in three lower bytes and the size in the fourth byte.
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int num_digits = static_cast<int>(end - begin);
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// Slightly faster check for specs.width == 0 && specs.precision == -1.
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if ((specs.width | (specs.precision + 1)) == 0) {
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auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
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for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
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*it++ = static_cast<Char>(p & 0xff);
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return base_iterator(out, copy<Char>(begin, end, it));
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}
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auto data = write_int_data<Char>(num_digits, prefix, specs);
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return write_padded<Char, align::right>(
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out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
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for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
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*it++ = static_cast<Char>(p & 0xff);
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it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
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return copy<Char>(begin, end, it);
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});
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}
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template <typename Char, typename OutputIt, typename T>
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FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(OutputIt out,
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write_int_arg<T> arg,
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@ -2238,6 +2233,7 @@ FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(OutputIt out,
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-> OutputIt {
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return write_int<Char>(out, arg, specs);
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}
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template <typename Char, typename T,
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FMT_ENABLE_IF(is_integral<T>::value &&
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!std::is_same<T, bool>::value &&
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@ -2249,6 +2245,7 @@ FMT_CONSTEXPR FMT_INLINE auto write(basic_appender<Char> out, T value,
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return write_int_noinline<Char>(out, make_write_int_arg(value, specs.sign()),
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specs);
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}
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// An inlined version of write used in format string compilation.
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template <typename Char, typename OutputIt, typename T,
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FMT_ENABLE_IF(is_integral<T>::value &&
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@ -3121,7 +3118,7 @@ FMT_CONSTEXPR20 void format_hexfloat(Float value, format_specs specs,
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char xdigits[num_bits<carrier_uint>() / 4];
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detail::fill_n(xdigits, sizeof(xdigits), '0');
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format_uint<4>(xdigits, f.f, num_xdigits, specs.upper());
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format_base2e(4, xdigits, f.f, num_xdigits, specs.upper());
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// Remove zero tail
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while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits;
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