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This commit is contained in:
Stepan Ponomarev 2022-10-20 10:21:56 +02:00
parent 85a4cefd86
commit 21a828cd1c
2 changed files with 18 additions and 9 deletions
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12
include/fmt/chrono.h
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@ -1119,7 +1119,8 @@ void write_floating_seconds(memory_buffer& buf, Duration duration) {
} }
template <typename Duration> template <typename Duration>
void write_floating_seconds(memory_buffer& buf, Duration duration, int precision) { void write_floating_seconds(memory_buffer& buf, Duration duration,
int precision) {
if (precision < 0) { if (precision < 0) {
write_floating_seconds(buf, duration); write_floating_seconds(buf, duration);
return; return;
@ -1894,16 +1895,19 @@ struct chrono_formatter {
if (ns == numeric_system::standard) { if (ns == numeric_system::standard) {
if (std::is_floating_point<rep>::value) { if (std::is_floating_point<rep>::value) {
auto buf = memory_buffer(); auto buf = memory_buffer();
write_floating_seconds(buf, std::chrono::duration<rep, Period>(val), precision); write_floating_seconds(buf, std::chrono::duration<rep, Period>(val),
precision);
if (negative) *out++ = '-'; if (negative) *out++ = '-';
if (buf.size() < 2 || buf[1] == '.') *out++ = '0'; if (buf.size() < 2 || buf[1] == '.') *out++ = '0';
out = std::copy(buf.begin(), buf.end(), out); out = std::copy(buf.begin(), buf.end(), out);
} else { } else {
write(second(), 2); write(second(), 2);
if (precision >= 0) { if (precision >= 0) {
write_fractional_seconds<char_type>(out, std::chrono::duration<rep, Period>(val), precision); write_fractional_seconds<char_type>(
out, std::chrono::duration<rep, Period>(val), precision);
} else { } else {
write_fractional_seconds<char_type>(out, std::chrono::duration<rep, Period>(val)); write_fractional_seconds<char_type>(
out, std::chrono::duration<rep, Period>(val));
} }
} }
return; return;

15
test/chrono-test.cc
View File

@ -612,11 +612,16 @@ TEST(chrono_test, cpp20_duration_subsecond_support) {
"-13.420148734"); "-13.420148734");
EXPECT_EQ(fmt::format("{:%S}", std::chrono::milliseconds{1234}), "01.234"); EXPECT_EQ(fmt::format("{:%S}", std::chrono::milliseconds{1234}), "01.234");
// Check subsecond presision modifier. // Check subsecond presision modifier.
EXPECT_EQ(fmt::format("{:.6%S}", std::chrono::nanoseconds{1234}), "00.000001"); EXPECT_EQ(fmt::format("{:.6%S}", std::chrono::nanoseconds{1234}),
EXPECT_EQ(fmt::format("{:.18%S}", std::chrono::nanoseconds{1234}), "00.000001234000000000"); "00.000001");
EXPECT_EQ(fmt::format("{:.{}%S}", std::chrono::nanoseconds{1234}, 6), "00.000001"); EXPECT_EQ(fmt::format("{:.18%S}", std::chrono::nanoseconds{1234}),
EXPECT_EQ(fmt::format("{:.6%S}", std::chrono::milliseconds{1234}), "01.234000"); "00.000001234000000000");
EXPECT_EQ(fmt::format("{:.6%S}", std::chrono::milliseconds{-1234}), "-01.234000"); EXPECT_EQ(fmt::format("{:.{}%S}", std::chrono::nanoseconds{1234}, 6),
"00.000001");
EXPECT_EQ(fmt::format("{:.6%S}", std::chrono::milliseconds{1234}),
"01.234000");
EXPECT_EQ(fmt::format("{:.6%S}", std::chrono::milliseconds{-1234}),
"-01.234000");
EXPECT_EQ(fmt::format("{:.3%S}", std::chrono::seconds{1234}), "34.000"); EXPECT_EQ(fmt::format("{:.3%S}", std::chrono::seconds{1234}), "34.000");
EXPECT_EQ(fmt::format("{:.3%S}", std::chrono::hours{1234}), "00.000"); EXPECT_EQ(fmt::format("{:.3%S}", std::chrono::hours{1234}), "00.000");
EXPECT_EQ(fmt::format("{:.5%S}", dms(1.234)), "00.00123"); EXPECT_EQ(fmt::format("{:.5%S}", dms(1.234)), "00.00123");