Query: xdf_closest_type
OS: debian
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
XDF_CLOSEST_TYPE(3) xdffileio library manual XDF_CLOSEST_TYPE(3)NAMExdf_closest_type - Returns a compatible data typeSYNOPSIS#include <xdfio.h> int xdf_closest_type(struct xdf* xdf, enum xdftype target);DESCRIPTIONxdf_closest_type() selects among the data types supported by the file referenced by xdf the type that is the closest to the target argu- ment. The selected type can then be safely used in a call to xdf_set_chconf(3) with the XDF_CF_STOTYPE field. The selection algorithm is based on the 3 following criterions (cited by priority, i.e. most important cited first): data size, signed/unsigned type, float/integer value. The data size criterion forces the selected type to have a data size (number of byte to repre- sent the value) equal or bigger than the one of the target type (with a preference with sizes the closest to the size of target). The signed/unsigned criterion tries to select a type that has the same signeness (signed or unsigned data type) as the target. Finally the float/integer criterion tries to select a floating point type if target is float or double or an integer data type if target is an integer type. As a consequence, if target is supported by the underlying file format of xdf, the function is ensured to return target.RETURN VALUExdf_closest_type() returns the selected data type in case of success, otherwise -1 and errno is set appropriately.ERRORSEINVAL the xdf pointer is NULL, or the argument type is not an admissible enum xdftype value.SEE ALSOxdf_set_chconf(3)EPFL2010 XDF_CLOSEST_TYPE(3)
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xdf_set_chconf(3) - debian |
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