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Voice API for Windows Operating Systems Library Reference — November 2003 519
user-defined input/output — DX_UIO
DX_UIO
user-defined input/output
typedef struct DX_UIO {
int (*u_read) ( );
int (*u_write) ( );
int (*u_seek) ( );
} DX_UIO;
!
!!
! Description
The DX_UIO data structure contains parameters for user-defined input/output.
This structure, returned by dx_setuio( ), contains pointers to user-defined I/O functions for
accessing non-standard storage devices.
!
!!
! Field Descriptions
The fields of the DX_UIO data structure are described as follows:
u_read
points to the user-defined read( ) function, which returns an integer equal to the number of
bytes read or -1 for error
u_write
points to the user-defined write( ) function, which returns an integer equal to the number of
bytes written or -1 for error
u_seek
points to the user-defined lseek( ) function, which returns a long equal to the offset into the I/O
device where the read or write is to start or -1 for error
!
!!
! Example
For an example of how to use the DX_UIO structure, see the Example section for dx_setuio( ).