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etl/test/test_to_wstring.cpp
John Wellbelove 88c1b34411
Feature/to string float uses double math (#1610) 
* Added overloaded etl::floor() and etl::ceil()

Added tests for float, double, long double

* Documented functions from math.h

* Added more math wrappers.

Move wrappers to clib namespace

* Cleanup of duplicated code.

* clang-format

* Code review updates

---------

Co-authored-by: John Wellbelove <john.wellbelove@etlcpp.com>
2026-10-12 09:36:21 +01:00

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/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2019 John Wellbelove
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
#include "unit_test_framework.h"
#include <iomanip>
#include <limits>
#include <ostream>
#include <sstream>
#include "etl/format_spec.h"
#include "etl/to_wstring.h"
#include "etl/wstring.h"
#undef STR
#define STR(x) L##x
namespace
{
typedef etl::wformat_spec Format;
using String20 = etl::wstring<20>;
using String64 = etl::wstring<64>;
SUITE(test_to_wstring)
{
//*************************************************************************
TEST(test_default_format_no_append)
{
String20 str;
CHECK(String20(STR("0")) == etl::to_string(uint8_t(0), str));
CHECK(String20(STR("0")) == etl::to_string(uint16_t(0), str));
CHECK(String20(STR("0")) == etl::to_string(uint32_t(0), str));
CHECK(String20(STR("0")) == etl::to_string(uint64_t(0), str));
CHECK(String20(STR("128")) == etl::to_string(uint8_t(128), str));
CHECK(String20(STR("32768")) == etl::to_string(uint16_t(32768), str));
CHECK(String20(STR("2147483648")) == etl::to_string(uint32_t(2147483648ul), str));
CHECK(String20(STR("9223372036854775808")) == etl::to_string(uint64_t(9223372036854775808ull), str));
CHECK(String20(STR("127")) == etl::to_string(INT8_MAX, str));
CHECK(String20(STR("32767")) == etl::to_string(INT16_MAX, str));
CHECK(String20(STR("2147483647")) == etl::to_string(INT32_MAX, str));
CHECK(String20(STR("9223372036854775807")) == etl::to_string(INT64_MAX, str));
CHECK(String20(STR("-128")) == etl::to_string(INT8_MIN, str));
CHECK(String20(STR("-32768")) == etl::to_string(INT16_MIN, str));
CHECK(String20(STR("-2147483648")) == etl::to_string(INT32_MIN, str));
CHECK(String20(STR("-9223372036854775808")) == etl::to_string(INT64_MIN, str));
}
//*************************************************************************
TEST(test_default_format_append)
{
etl::wstring<120> str;
CHECK(etl::wstring<120>(STR("0")) == etl::to_string(uint8_t(0), str, true));
CHECK(etl::wstring<120>(STR("00")) == etl::to_string(uint16_t(0), str, true));
CHECK(etl::wstring<120>(STR("000")) == etl::to_string(uint32_t(0), str, true));
CHECK(etl::wstring<120>(STR("0000")) == etl::to_string(uint64_t(0), str, true));
CHECK(etl::wstring<120>(STR("0000128")) == etl::to_string(uint8_t(128), str, true));
CHECK(etl::wstring<120>(STR("000012832768")) == etl::to_string(uint16_t(32768), str, true));
CHECK(etl::wstring<120>(STR("0000128327682147483648")) == etl::to_string(uint32_t(2147483648ul), str, true));
CHECK(etl::wstring<120>(STR("00001283276821474836489223372036854775808")) == etl::to_string(uint64_t(9223372036854775808ull), str, true));
CHECK(etl::wstring<120>(STR("00001283276821474836489223372036854775808127")) == etl::to_string(INT8_MAX, str, true));
CHECK(etl::wstring<120>(STR("0000128327682147483648922337203685477580812732767")) == etl::to_string(INT16_MAX, str, true));
CHECK(etl::wstring<120>(STR("00001283276821474836489223372036854775808127327672147483647")) == etl::to_string(INT32_MAX, str, true));
CHECK(etl::wstring<120>(STR("000012832768214748364892233720368547758081273276721474836479223372036854775807"))
== etl::to_string(INT64_MAX, str, true));
CHECK(etl::wstring<120>(STR("000012832768214748364892233720368547758081273276721474836479223372036854775807-128"))
== etl::to_string(INT8_MIN, str, true));
CHECK(etl::wstring<120>(STR("000012832768214748364892233720368547758081273276721474836479223372036854775807-128-32768"))
== etl::to_string(INT16_MIN, str, true));
CHECK(etl::wstring<120>(STR("000012832768214748364892233720368547758081273276721474836479223372036854775807-128-32768-2147483648"))
== etl::to_string(INT32_MIN, str, true));
CHECK(etl::wstring<120>(
STR("000012832768214748364892233720368547758081273276721474836479223372036854775807-128-32768-2147483648-9223372036854775808"))
== etl::to_string(INT64_MIN, str, true));
}
//*************************************************************************
TEST(test_format_right_justified_no_append)
{
String20 str;
Format format = Format().base(10).width(20).fill(STR('#'));
CHECK(String20(STR("###################0")) == etl::to_string(uint8_t(0), str, format));
CHECK(String20(STR("###################0")) == etl::to_string(uint16_t(0), str, format));
CHECK(String20(STR("###################0")) == etl::to_string(uint32_t(0), str, format));
CHECK(String20(STR("###################0")) == etl::to_string(uint64_t(0), str, format));
CHECK(String20(STR("#################128")) == etl::to_string(uint8_t(128), str, format));
CHECK(String20(STR("###############32768")) == etl::to_string(uint16_t(32768), str, format));
CHECK(String20(STR("##########2147483648")) == etl::to_string(uint32_t(2147483648ul), str, format));
CHECK(String20(STR("#9223372036854775808")) == etl::to_string(uint64_t(9223372036854775808ull), str, format));
CHECK(String20(STR("#################127")) == etl::to_string(INT8_MAX, str, format));
CHECK(String20(STR("###############32767")) == etl::to_string(INT16_MAX, str, format));
CHECK(String20(STR("##########2147483647")) == etl::to_string(INT32_MAX, str, format));
CHECK(String20(STR("#9223372036854775807")) == etl::to_string(INT64_MAX, str, format));
CHECK(String20(STR("################-128")) == etl::to_string(INT8_MIN, str, format));
CHECK(String20(STR("##############-32768")) == etl::to_string(INT16_MIN, str, format));
CHECK(String20(STR("#########-2147483648")) == etl::to_string(INT32_MIN, str, format));
CHECK(String20(STR("-9223372036854775808")) == etl::to_string(INT64_MIN, str, format));
}
//*************************************************************************
TEST(test_format_left_justified_no_append)
{
String20 str;
Format format = Format().base(10).width(20).fill(STR('#')).left();
CHECK(String20(STR("0###################")) == etl::to_string(uint8_t(0), str, format));
CHECK(String20(STR("0###################")) == etl::to_string(uint16_t(0), str, format));
CHECK(String20(STR("0###################")) == etl::to_string(uint32_t(0), str, format));
CHECK(String20(STR("0###################")) == etl::to_string(uint64_t(0), str, format));
CHECK(String20(STR("128#################")) == etl::to_string(uint8_t(128), str, format));
CHECK(String20(STR("32768###############")) == etl::to_string(uint16_t(32768), str, format));
CHECK(String20(STR("2147483648##########")) == etl::to_string(uint32_t(2147483648ul), str, format));
CHECK(String20(STR("9223372036854775808#")) == etl::to_string(uint64_t(9223372036854775808ull), str, format));
CHECK(String20(STR("127#################")) == etl::to_string(INT8_MAX, str, format));
CHECK(String20(STR("32767###############")) == etl::to_string(INT16_MAX, str, format));
CHECK(String20(STR("2147483647##########")) == etl::to_string(INT32_MAX, str, format));
CHECK(String20(STR("9223372036854775807#")) == etl::to_string(INT64_MAX, str, format));
CHECK(String20(STR("-128################")) == etl::to_string(INT8_MIN, str, format));
CHECK(String20(STR("-32768##############")) == etl::to_string(INT16_MIN, str, format));
CHECK(String20(STR("-2147483648#########")) == etl::to_string(INT32_MIN, str, format));
CHECK(String20(STR("-9223372036854775808")) == etl::to_string(INT64_MIN, str, format));
}
//*************************************************************************
TEST(test_binary_format_no_append)
{
String64 str;
CHECK(String64(STR("00000000")) == etl::to_string(uint8_t(0), str, Format().base(2).width(8).fill(STR('0'))));
CHECK(String64(STR("0000000000000000")) == etl::to_string(uint16_t(0), str, Format().base(2).width(16).fill(STR('0'))));
CHECK(String64(STR("00000000000000000000000000000000")) == etl::to_string(uint32_t(0), str, Format().base(2).width(32).fill(STR('0'))));
CHECK(String64(STR("0000000000000000000000000000000000000000000000000000000000000000"))
== etl::to_string(uint64_t(0), str, Format().base(2).width(64).fill(STR('0'))));
CHECK(String64(STR("10000000")) == etl::to_string(uint8_t(128), str, Format().base(2).width(8).fill(STR('0'))));
CHECK(String64(STR("1000000000000000")) == etl::to_string(uint16_t(32768), str, Format().base(2).width(16).fill(STR('0'))));
CHECK(String64(STR("10000000000000000000000000000000"))
== etl::to_string(uint32_t(2147483648ul), str, Format().base(2).width(32).fill(STR('0'))));
CHECK(String64(STR("1000000000000000000000000000000000000000000000000000000000000000"))
== etl::to_string(uint64_t(9223372036854775808ull), str, Format().base(2).width(64).fill(STR('0'))));
CHECK(String64(STR("01111111")) == etl::to_string(INT8_MAX, str, Format().base(2).width(8).fill(STR('0'))));
CHECK(String64(STR("0111111111111111")) == etl::to_string(INT16_MAX, str, Format().base(2).width(16).fill(STR('0'))));
CHECK(String64(STR("01111111111111111111111111111111")) == etl::to_string(INT32_MAX, str, Format().base(2).width(32).fill(STR('0'))));
CHECK(String64(STR("0111111111111111111111111111111111111111111111111111111111111111"))
== etl::to_string(INT64_MAX, str, Format().base(2).width(64).fill(STR('0'))));
CHECK(String64(STR("10000000")) == etl::to_string(INT8_MIN, str, Format().base(2).width(8).fill(STR('0'))));
CHECK(String64(STR("1000000000000000")) == etl::to_string(INT16_MIN, str, Format().base(2).width(16).fill(STR('0'))));
CHECK(String64(STR("10000000000000000000000000000000")) == etl::to_string(INT32_MIN, str, Format().base(2).width(32).fill(STR('0'))));
CHECK(String64(STR("1000000000000000000000000000000000000000000000000000000000000000"))
== etl::to_string(INT64_MIN, str, Format().base(2).width(64).fill(STR('0'))));
}
//*************************************************************************
TEST(test_octal_format_no_append)
{
etl::wstring<22> str;
CHECK(etl::wstring<22>(STR("000")) == etl::to_string(uint8_t(0), str, Format().base(8).width(3).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("000000")) == etl::to_string(uint16_t(0), str, Format().base(8).width(6).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("00000000000")) == etl::to_string(uint32_t(0), str, Format().base(8).width(11).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("0000000000000000000000")) == etl::to_string(uint64_t(0), str, Format().base(8).width(22).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("200")) == etl::to_string(uint8_t(128), str, Format().base(8).width(3).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("100000")) == etl::to_string(uint16_t(32768), str, Format().base(8).width(6).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("20000000000")) == etl::to_string(uint32_t(2147483648ul), str, Format().base(8).width(11).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("1000000000000000000000"))
== etl::to_string(uint64_t(9223372036854775808ull), str, Format().base(8).width(22).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("177")) == etl::to_string(INT8_MAX, str, Format().base(8).width(3).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("077777")) == etl::to_string(INT16_MAX, str, Format().base(8).width(6).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("17777777777")) == etl::to_string(INT32_MAX, str, Format().base(8).width(11).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("0777777777777777777777")) == etl::to_string(INT64_MAX, str, Format().base(8).width(22).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("200")) == etl::to_string(INT8_MIN, str, Format().base(8).width(3).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("100000")) == etl::to_string(INT16_MIN, str, Format().base(8).width(6).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("20000000000")) == etl::to_string(INT32_MIN, str, Format().base(8).width(11).fill(STR('0'))));
CHECK(etl::wstring<22>(STR("1000000000000000000000")) == etl::to_string(INT64_MIN, str, Format().base(8).width(22).fill(STR('0'))));
}
//*************************************************************************
TEST(test_hex_format_no_append)
{
etl::wstring<16> str;
CHECK(etl::wstring<16>(STR("00")) == etl::to_string(uint8_t(0), str, Format().base(16).width(2).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("0000")) == etl::to_string(uint16_t(0), str, Format().base(16).width(4).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("00000000")) == etl::to_string(uint32_t(0), str, Format().base(16).width(8).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("0000000000000000")) == etl::to_string(uint64_t(0), str, Format().base(16).width(16).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("80")) == etl::to_string(uint8_t(128), str, Format().base(16).width(2).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("8000")) == etl::to_string(uint16_t(32768), str, Format().base(16).width(4).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("80000000")) == etl::to_string(uint32_t(2147483648ul), str, Format().base(16).width(8).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("8000000000000000"))
== etl::to_string(uint64_t(9223372036854775808ull), str, Format().base(16).width(16).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("7f")) == etl::to_string(INT8_MAX, str, Format().base(16).width(2).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("7fff")) == etl::to_string(INT16_MAX, str, Format().base(16).width(4).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("7fffffff")) == etl::to_string(INT32_MAX, str, Format().base(16).width(8).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("7fffffffffffffff")) == etl::to_string(INT64_MAX, str, Format().base(16).width(16).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("80")) == etl::to_string(INT8_MIN, str, Format().base(16).width(2).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("8000")) == etl::to_string(INT16_MIN, str, Format().base(16).width(4).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("80000000")) == etl::to_string(INT32_MIN, str, Format().base(16).width(8).fill(STR('0'))));
CHECK(etl::wstring<16>(STR("8000000000000000")) == etl::to_string(INT64_MIN, str, Format().base(16).width(16).fill(STR('0'))));
}
//*************************************************************************
TEST(test_named_format_no_append)
{
etl::wstring<17> str;
CHECK(etl::wstring<17>(STR("11110001001000000")) == etl::to_string(123456, str, Format().binary()));
CHECK(etl::wstring<17>(STR("361100")) == etl::to_string(123456, str, Format().octal()));
CHECK(etl::wstring<17>(STR("123456")) == etl::to_string(123456, str, Format().decimal()));
CHECK(etl::wstring<17>(STR("1e240")) == etl::to_string(123456, str, Format().hex()));
}
//*************************************************************************
TEST(test_floating_point_no_append)
{
String20 str;
CHECK(String20(STR(" 0.000000")) == etl::to_string(0.0, str, Format().precision(6).width(10).right()));
CHECK(String20(STR("0.000000 ")) == etl::to_string(0.0, str, Format().precision(6).width(10).left()));
CHECK(String20(STR(" 0.000001")) == etl::to_string(0.000001, str, Format().precision(6).width(10).right()));
CHECK(String20(STR("0.000001 ")) == etl::to_string(0.000001, str, Format().precision(6).width(10).left()));
CHECK(String20(STR(" 1.000000")) == etl::to_string(1.0, str, Format().precision(6).width(10).right()));
CHECK(String20(STR("1.000000 ")) == etl::to_string(1.0, str, Format().precision(6).width(10).left()));
CHECK(String20(STR(" 1.000001")) == etl::to_string(1.000001, str, Format().precision(6).width(10).right()));
CHECK(String20(STR("1.000001 ")) == etl::to_string(1.000001, str, Format().precision(6).width(10).left()));
CHECK(String20(STR(" 12.345678")) == etl::to_string(12.345678, str, Format().precision(6).width(10).right()));
CHECK(String20(STR("12.345678 ")) == etl::to_string(12.345678, str, Format().precision(6).width(10).left()));
CHECK(String20(STR(" -12.345678")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).right()));
CHECK(String20(STR("-12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left()));
CHECK(String20(STR(" -0.123456")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).right()));
CHECK(String20(STR("-0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left()));
}
//*************************************************************************
TEST(test_floating_point_append)
{
String20 str;
str.assign(STR("Result "));
CHECK(String20(STR("Result 12.345678")) == etl::to_string(12.345678, str, Format().precision(6).width(10).right(), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result 12.345678 ")) == etl::to_string(12.345678, str, Format().precision(6).width(10).left(), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result -12.345678")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).right(), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result -12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left(), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result -0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left(), true));
}
//*************************************************************************
TEST(test_floating_point_rounding)
{
String20 str;
CHECK(String20(STR("0.00001")) == etl::to_string(0.000009, str, Format().precision(5).width(7).right()));
CHECK(String20(STR("0.0001")) == etl::to_string(0.000099, str, Format().precision(4).width(6).right()));
CHECK(String20(STR("0.001")) == etl::to_string(0.000999, str, Format().precision(3).width(5).right()));
CHECK(String20(STR("0.01")) == etl::to_string(0.009999, str, Format().precision(2).width(4).right()));
CHECK(String20(STR("0.1")) == etl::to_string(0.099999, str, Format().precision(1).width(3).right()));
CHECK(String20(STR("1.0")) == etl::to_string(0.999999, str, Format().precision(1).width(3).right()));
CHECK(String20(STR("1")) == etl::to_string(0.999999, str, Format().precision(0).width(1).right()));
CHECK(String20(STR("10.0")) == etl::to_string(9.999999, str, Format().precision(1).width(4).right()));
CHECK(String20(STR("2")) == etl::to_string(1.999999, str, Format().precision(0).width(1).right()));
CHECK(String20(STR("10.0")) == etl::to_string(9.999999, str, Format().precision(1).width(4).right()));
CHECK(String20(STR("20.0")) == etl::to_string(19.999999, str, Format().precision(1).width(4).right()));
}
//*************************************************************************
TEST(test_bool_no_append)
{
String20 str;
CHECK(String20(STR(" 0")) == to_string(false, str, Format().precision(6).width(10).right().boolalpha(false)));
CHECK(String20(STR(" 1")) == to_string(true, str, Format().precision(6).width(10).right().boolalpha(false)));
CHECK(String20(STR("0 ")) == to_string(false, str, Format().precision(6).width(10).left().boolalpha(false)));
CHECK(String20(STR("1 ")) == to_string(true, str, Format().precision(6).width(10).left().boolalpha(false)));
CHECK(String20(STR(" false")) == to_string(false, str, Format().precision(6).width(10).right().boolalpha(true)));
CHECK(String20(STR(" true")) == to_string(true, str, Format().precision(6).width(10).right().boolalpha(true)));
CHECK(String20(STR("false ")) == to_string(false, str, Format().precision(6).width(10).left().boolalpha(true)));
CHECK(String20(STR("true ")) == to_string(true, str, Format().precision(6).width(10).left().boolalpha(true)));
}
//*************************************************************************
TEST(test_bool_append)
{
String20 str;
str.assign(STR("Result "));
CHECK(String20(STR("Result 0")) == to_string(false, str, Format().precision(6).width(10).right().boolalpha(false), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result 1")) == to_string(true, str, Format().precision(6).width(10).right().boolalpha(false), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result 0 ")) == to_string(false, str, Format().precision(6).width(10).left().boolalpha(false), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result 1 ")) == to_string(true, str, Format().precision(6).width(10).left().boolalpha(false), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result false")) == to_string(false, str, Format().precision(6).width(10).right().boolalpha(true), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result true")) == to_string(true, str, Format().precision(6).width(10).right().boolalpha(true), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result false ")) == to_string(false, str, Format().precision(6).width(10).left().boolalpha(true), true));
str.assign(STR("Result "));
CHECK(String20(STR("Result true ")) == to_string(true, str, Format().precision(6).width(10).left().boolalpha(true), true));
}
//*************************************************************************
TEST(test_pointer_no_append)
{
String20 str;
static const volatile int cvi = 0;
std::wostringstream oss;
oss.width(10);
oss.fill(STR('0'));
oss << std::hex << std::right << uintptr_t(&cvi);
std::wstring temp(oss.str());
String20 compare(temp.begin(), temp.end());
to_string(&cvi, str, Format().hex().width(10).right().fill(STR('0')));
CHECK(compare == str);
oss.clear();
oss.str(STR(""));
oss.width(10);
oss.fill(STR('0'));
oss << std::hex << std::left << uintptr_t(&cvi);
temp = oss.str();
compare.assign(temp.begin(), temp.end());
to_string(&cvi, str, Format().hex().width(10).left().fill(STR('0')));
CHECK(compare == str);
}
//*************************************************************************
TEST(test_pointer_append)
{
String20 str;
static const volatile int cvi = 0;
std::wostringstream oss;
oss.width(10);
oss.fill(STR('0'));
oss << std::hex << std::right << uintptr_t(&cvi);
std::wstring temp(STR("Result "));
temp.append(oss.str());
String20 compare(temp.begin(), temp.end());
str.assign(STR("Result "));
to_string(&cvi, str, Format().hex().width(10).right().fill(STR('0')), true);
CHECK(compare == str);
oss.clear();
oss.str(STR(""));
oss.width(10);
oss.fill(STR('0'));
oss << std::hex << std::left << uintptr_t(&cvi);
temp = STR("Result ");
temp.append(oss.str());
compare.assign(temp.begin(), temp.end());
str.assign(STR("Result "));
to_string(&cvi, str, Format().hex().width(10).left().fill(STR('0')), true);
CHECK(compare == str);
}
//*************************************************************************
TEST(test_integer_denominator_default_format)
{
String20 result;
int value = -1234567;
etl::to_string(value, 6U, result);
CHECK(String20(STR("-1")) == result);
}
//*************************************************************************
TEST(test_integer_denominator_huge_precision)
{
String20 result;
int value = -1234560;
Format format = Format().precision(100);
etl::to_string(value, 6U, result, format);
CHECK(String20(STR("-1.234560")) == result);
}
//*************************************************************************
TEST(test_integer_denominator_huge_precision_64bit)
{
String20 result;
int64_t value = INT64_MIN;
Format format = Format().precision(100);
etl::to_string(value, 12U, result, format);
CHECK(String20(STR("-9223372.036854775808")) == result);
}
//*************************************************************************
TEST(test_integer_denominator_zero_fractional)
{
String20 result_i;
int value_i = -1000000;
String20 result_d;
double value_d = -1.000000;
Format format = Format().precision(4);
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-1.0000")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_zero_value)
{
String20 result_i;
int value_i = 0;
String20 result_d;
double value_d = -0.000000;
Format format = Format().precision(4);
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("0.0000")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_zero_integral_small_fractional)
{
String20 result_i;
int value_i = -400;
String20 result_d;
double value_d = -0.000400;
Format format = Format().precision(4);
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-0.0004")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_small_fractional)
{
String20 result_i;
int value_i = -123000400;
String20 result_d;
double value_d = -123.000400;
Format format = Format().precision(4);
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-123.0004")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_very_small_fractional)
{
String20 result_i;
int value_i = -123000004;
String20 result_d;
double value_d = -123.000004;
Format format = Format().precision(4);
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-123.0000")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_very_small_fractional_rounded_up)
{
String20 result_i;
int value_i = -123000050;
String20 result_d;
double value_d = -123.000050;
Format format = Format().precision(4);
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-123.0001")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_shorter_width)
{
String20 result_i;
int value_i = -123456780;
String20 result_d;
double value_d = -123.456780;
Format format = Format().precision(4).width(6).right();
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-123.4568")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_larger_width)
{
String20 result_i;
int value_i = -123456780;
String20 result_d;
double value_d = -123.456780;
Format format = Format().precision(4).width(15).right();
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR(" -123.4568")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_positive_rollover)
{
String20 result_i;
int value_i = 123999990;
String20 result_d;
double value_d = 123.999990;
Format format = Format().precision(4).right();
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("124.0000")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_integer_denominator_negative_rollover)
{
String20 result_i;
int value_i = -123999990;
String20 result_d;
double value_d = -123.999990;
Format format = Format().precision(4).right();
etl::to_string(value_i, 6U, result_i, format);
etl::to_string(value_d, result_d, format);
CHECK(String20(STR("-124.0000")) == result_i);
CHECK(result_d == result_i);
}
//*************************************************************************
TEST(test_issue_1438_does_not_handle_floating_point_number_with_integer_part_exceeding_max_uint64_t)
{
if (std::numeric_limits<double>::is_iec559)
{
// Check forced scientific formatting for smaller numbers.
String64 s0;
etl::to_string(1000.0, s0, Format().precision(5).width(15).right().scientific(true));
CHECK(String64(STR(" 1.00000e+3")) == s0);
etl::to_string(1000.0, s0, Format().precision(5).width(15).right().scientific(true).upper_case(true));
CHECK(String64(STR(" 1.00000E+3")) == s0);
// Maximum double value is 1.7976931348623157e+308, which rounds to 1.79769e+308 with 5 digits of precision.
String64 s1;
etl::to_string(std::numeric_limits<double>::max(), s1, Format().precision(5).width(15).right());
CHECK(String64(STR(" 1.79769e+308")) == s1);
// Negative maximum double value is -1.7976931348623157e+308, which rounds to -1.79769e+308 with 5 digits of precision.
String64 s2;
etl::to_string(-std::numeric_limits<double>::max(), s2, Format().precision(5).width(15).right());
CHECK(String64(STR(" -1.79769e+308")) == s2);
}
#if ETL_USING_64BIT_TYPES
using workspace_t = etl::private_to_string::workspace_t;
// Maximum workspace_t value is 9223372036854775807.
String64 s3;
etl::to_string(std::numeric_limits<workspace_t>::max(), s3, Format().precision(5).width(21).right());
CHECK(String64(STR(" 9223372036854775807")) == s3);
// Minimum workspace_t value is -9223372036854775808.
String64 s4;
etl::to_string(std::numeric_limits<workspace_t>::min(), s4, Format().precision(5).width(21).right());
CHECK(String64(STR(" -9223372036854775808")) == s4);
using uworkspace_t = etl::private_to_string::uworkspace_t;
// Maximum uworkspace_t value is 18446744073709551615.
String64 s5;
etl::to_string(std::numeric_limits<uworkspace_t>::max(), s5, Format().precision(5).width(21).right());
CHECK(String64(STR(" 18446744073709551615")) == s5);
// Minimum uworkspace_t value is 0.
String64 s6;
etl::to_string(std::numeric_limits<uworkspace_t>::min(), s6, Format().precision(5).width(21).right());
CHECK(String64(STR(" 0")) == s6);
#endif
}
//*************************************************************************
TEST(test_issue_1436_case_support_for_nan_inf_in_to_string)
{
if (std::numeric_limits<double>::is_iec559)
{
String64 s1;
etl::to_string(std::numeric_limits<double>::quiet_NaN(), s1, Format().precision(5).width(15).right().scientific(true).upper_case(false));
CHECK(String64(STR(" nan")) == s1);
String64 s2;
etl::to_string(std::numeric_limits<double>::infinity(), s2, Format().precision(5).width(15).right().scientific(true).upper_case(false));
CHECK(String64(STR(" inf")) == s2);
String64 s3;
etl::to_string(-std::numeric_limits<double>::infinity(), s3, Format().precision(5).width(15).right().scientific(true).upper_case(false));
CHECK(String64(STR(" -inf")) == s3);
String64 s4;
etl::to_string(std::numeric_limits<double>::quiet_NaN(), s4, Format().precision(5).width(15).right().scientific(true).upper_case(true));
CHECK(String64(STR(" NAN")) == s4);
String64 s5;
etl::to_string(std::numeric_limits<double>::infinity(), s5, Format().precision(5).width(15).right().scientific(true).upper_case(true));
CHECK(String64(STR(" INF")) == s5);
String64 s6;
etl::to_string(-std::numeric_limits<double>::infinity(), s6, Format().precision(5).width(15).right().scientific(true).upper_case(true));
CHECK(String64(STR(" -INF")) == s6);
}
}
//*************************************************************************
TEST(test_issue_1593_to_string_float_uses_double_math)
{
String64 s1;
// Float
etl::to_string(3.1415927f, s1, Format().precision(4));
CHECK_TRUE(String64(STR("3.1416")) == s1);
// Double
etl::to_string(3.1415927, s1, Format().precision(4));
CHECK_TRUE(String64(STR("3.1416")) == s1);
// Long double
etl::to_string(3.1415927l, s1, Format().precision(4));
CHECK_TRUE(String64(STR("3.1416")) == s1);
}
}
} // namespace
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