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Writing a float printing routine

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jsalling
2016-09-04 20:48:29 -05:00
parent 661c1b2d56
commit 6ec7c78b66
1 changed files with 53 additions and 3 deletions
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56
src/unity.c
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@ -263,9 +263,59 @@ void UnityPrintMask(const _U_UINT mask, const _U_UINT number)
void UnityPrintFloat(_UD number) void UnityPrintFloat(_UD number)
{ {
char TempBuffer[UNITY_VERBOSE_NUMBER_MAX_LENGTH + 1]; // char TempBuffer[UNITY_VERBOSE_NUMBER_MAX_LENGTH + 1];
snprintf(TempBuffer, sizeof(TempBuffer), "%.6f", number); // snprintf(TempBuffer, sizeof(TempBuffer), "%.6f", number);
UnityPrint(TempBuffer); // UnityPrint(TempBuffer);
if (isnan(number))
{
UnityPrint(UnityStrNaN);
return;
}
if (number < 0)
{
UNITY_OUTPUT_CHAR('-');
number = -number;
}
if (isinf(number)) UnityPrintLen(UnityStrInf, 3);
else
{
_UD divisor = 1;
_U_UINT exponent = 0;
while (number / divisor >= 10.0f)
{
divisor *= 10;
exponent++;
}
/* 10000000 < 2^24, max integer cast to a float without truncation */
#define FLOAT_SCI_FORMAT_MINIMUM 10000000
if (number >= FLOAT_SCI_FORMAT_MINIMUM)
{ /* Print in scientific format: 1.123456e38 */
int i;
for (i = 0; i < 7; i++)
{
UNITY_OUTPUT_CHAR('0' + (int)(number / divisor) % 10);
if (i == 0) UNITY_OUTPUT_CHAR('.');
divisor /= 10.0f;
}
UNITY_OUTPUT_CHAR('e');
UnityPrintNumberUnsigned(exponent);
}
else
{ /* Print up to 9 characters, 6 after the decimal max */
_UD decimals = FLOAT_SCI_FORMAT_MINIMUM/divisor;
if (decimals > 1000000) decimals = 1000000;
number = number + 0.5f/decimals; /* Rounding */
while (decimals >= 1)
{
UNITY_OUTPUT_CHAR('0' + (int)(number / divisor) % 10);
if (divisor == 1.0f) UNITY_OUTPUT_CHAR('.');
if (divisor <= 1.0f) decimals /= 10;
divisor /= 10;
}
}
}
} }
#endif #endif