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.Dd November 20, 2023
.Dt MAT_VARGETNUMBEROFFIELDS 3
.Os
.Sh NAME
.Nm Mat_VarGetNumberOfFields
.Nd Gets the number of fields for a structure variable.
.Sh SYNOPSIS
.Fd #include <matio.h>
.Ft unsigned
.Fo Mat_VarGetNumberOfFields
.Fa "const matvar_t *matvar"
.Fc
.Sh DESCRIPTION
The
.Fn Mat_VarGetNumberOfFields
function returns the number of fields for the structure variable
.Fa matvar.
.Sh RETURN VALUES
The number of fields will be returned on success, and 0 otherwise.
Note also that a structure can validly contain 0 fields.
.Sh SEE ALSO
.Xr Mat_VarGetStructFieldnames 3