cwbOBJ_SeekResource

Purpose

Moves the current read position on a resource that is open for reading.

Syntax

 
unsigned int CWB_ENTRY  cwbOBJ_SeekResource(
                               cwbOBJ_ObjHandle   resourceHandle,
                               cwbOBJ_SeekOrigin  seekOrigin,
                               signed long        seekOffset,
                               cwbSV_ErrHandle    errorHandle);

Parameters

cwbOBJ_ObjHandle resourceHandle - input

Handle of the AFP™ resource file to be seeked.

cwbOBJ_SeekOrigin seekOrigin - input

Where to seek from. Valid values are:

• CWBOBJ_SEEK_BEGINNING - seek from the beginning of file
• CWBOBJ_SEEK_CURRENT - seek from the current read position
• CWBOBJ_SEEK_ENDING - seek from the end of the file

signed long seekOffset - input

Offset (negative or positive) from the seek origin in bytes to move the current read pointer to.

cwbSV_ErrHandle errorHandle - output

Optional, may be 0. Any returned messages will be written to this object. It is created with the cwbSV_CreateErrHandle() API. The messages may be retrieved through the cwbSV_GetErrText() API. If the parameter is set to zero, no messages will be retrievable.

Return Codes

The following list shows common return values.

CWB_NO_ERROR

Successful completion.

CWB_NOT_ENOUGH_MEMORY

Insufficient memory.

CWB_INVALID_HANDLE

Handle is not valid spooled file handle.

CWB_INVALID_PARAMETER

Invalid parameter specified.

CWBOBJ_RC_HOST_ERROR

Host error occurred. Text may be in errorHandle.

CWBOBJ_RC_RSCNOTOPEN

Resource has not been opened yet.

CWBOBJ_RC_SEEKOUTOFRANGE

Seek offset out of range.

Usage

The cwbOBJ_OpenResource() API must be called with this resource handle before this API is called OR the handle must be retrieved with a call to the cwbOBJ_OpenResourceForSplF() API.