iflDataSize(3) Image Format Library C++ Reference Manual iflDataSize(3)
NAME
iflDataClosestType, iflDataIsIntegral, iflDataIsSigned, iflDataMax,
iflDataMin, iflDataSize, iflDataTypeFromRange - convenience functions for
using IFL data types
SYNOPSIS
#include <ifl/iflDataSize.h>
iflDataType iflDataClosestType(iflDataType desired,
int allowed, int flags=0)
int iflDataIsIntegral(iflDataType type)
int iflDataIsSigned(iflDataType type)
double iflDataMax(iflDataType type)
double iflDataMin(iflDataType type)
int iflDataSize(iflDataType type, int count=1)
iflDataType iflDataTypeFromRange(double minVal, double maxVal)
DESCRIPTION
These functions operate on IFL data types and are provided for
convenience. Each function is standalone and is not a member function of
any object.
The data types used in the IFL are specified by the enumerated type,
iflType, as defined in <ifl/iflTypes.h>. The following IFL data types are
valid: iflBit, iflUChar, iflChar, iflUShort, iflShort, iflUInt, iflInt,
iflFloat, iflDouble.
iflDataClosestType() returns the data type closest to the desired type in
the set specified by the mask of data types in allowed. The flags
parameter is the logical or of any of the folowing options:
iflDataWantSigned consider only signed types from allowed (unless
there aren't any, then fall back on unsigned
values)
iflDataAnySign consider both signed and unsigned types. The
default behaviour is to consider types that
match the signed/unsigned nature of desired.
iflDataDemote don't allow type promotion; only consider types
of the same size of smaller.
iflDataIsIntegral returns TRUE if type is an integral valued IFL type. If
type is a floating point IFL type, then FALSE is returned.
iflDataIsSigned() returns TRUE if type is a signed IFL type. If type is
an unsigned IFL type, then FALSE is returned.
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iflDataSize(3) Image Format Library C++ Reference Manual iflDataSize(3)
iflDataMax() returns the maximum value possible for the given data type,
type.
iflDataMin() returns the minimum value possible for the given IFL data
type, type.
iflDataSize() returns the size in bytes required to hold the number of
values specified by count, of the given data type, type.
iflDataTypeFromRange() returns the IFL data type required to hold the
range of values specified by minVal and maxVal.
SEE ALSO
ifl/iflTypes.h
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