3rd-party/Unity
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Round ties to even by default, many C libraries follow this

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Linux gcc & clang and OSX clang produce output with ties round to even
Windows mingw gcc does not
Example 0.0078125 prints '0.007812'
This commit is contained in:
jsalling
2016-11-09 23:07:31 -06:00
parent 4a27d14734
commit 54fe786fae
2 changed files with 11 additions and 0 deletions
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5
src/unity.c
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@@ -262,6 +262,9 @@ static void UnityPrintDecimalAndNumberWithLeadingZeros(_US32 fraction_part, _US3
if (fraction_part == 0) break; /* Truncate trailing 0's */
}
}
#define ROUND_TIES_TO_EVEN(num_int, num) \
if ((num_int & 1) == 1 && num_int > (num)) /* Odd and was rounded up */ \
if ((num) - (_US32)(num) <= 0.5) num_int -= 1 /* and remainder was 0.5, a tie */
/*
* char buffer[19];
@@ -288,6 +291,7 @@ void UnityPrintFloat(_UD number)
_UU32 integer_part = (_UU32)number;
_US32 fraction_part = (_US32)((number - integer_part)*1000000.0 + 0.5);
/* Double precision calculation gives best performance for six rounded decimal places */
ROUND_TIES_TO_EVEN(fraction_part, (number - integer_part)*1000000.0);
if (fraction_part == 1000000)
{
@@ -312,6 +316,7 @@ void UnityPrintFloat(_UD number)
}
integer_part = (_US32)(number / divide + 0.5);
/* Double precision calculation required for float, to produce 9 rounded digits */
ROUND_TIES_TO_EVEN(integer_part, number / divide);
UNITY_OUTPUT_CHAR('0' + integer_part / divisor);
UnityPrintDecimalAndNumberWithLeadingZeros(integer_part % divisor, divisor / 10);