[#BloombergLP-bdldfp-DecimalImpUtil-convertToDecimal128-0a]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdldfp.adoc[bdldfp]::xref:BloombergLP/bdldfp/DecimalImpUtil.adoc[DecimalImpUtil]::convertToDecimal128
:relfileprefix: ../../../
:mrdocs:

Convert the specified `input` to the closest value of the indicated result type following the conversion rules as defined by IEEE‐754:

== Synopsis

Declared in `<bdldfp_decimalimputil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:BloombergLP/bdldfp/DecimalImpUtil/ValueType128.adoc[DecimalImpUtil::ValueType128]
convertToDecimal128(xref:BloombergLP/bdldfp/DecimalImpUtil/ValueType32.adoc[ValueType32] const& input);
----

== Description

* If `input` is signaling NaN, store the value of the macro `EDOM` into `errno` and return signaling NaN value. * If `input` is NaN, return NaN value. * Otherwise if `input` is infinity (positive or negative), then return infinity with the same sign. * Otherwise if `input` is zero (positive or negative), then return zero with the same sign. * Otherwise if `input` has an absolute value that is larger than maximum or is smaller than minimum value supported by the result type, store the value of the macro `ERANGE` into `errno` and return infinity or zero with the same sign respectively. * Otherwise if `input` has a value that is not exactly representable using maximum digit number supported by the indicated result type then return the `input` rounded according to the rounding direction. * Otherwise return `input` value of the result type. Convert the specified 32‐bit decimal `input` to 128‐bit decimal.


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