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142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
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/*
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* Copyright (c) Kopriha Software, 1990-1991
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* All Rights Reserved
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*
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* Close.CC
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*
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* Description:
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* This module exists to abstract the data of the file I/O
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* primitives of GS/OS.
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*
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*
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* History:Oct 13, 1990 Dave Created this file
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*
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* Feb 25, 1991 Dave Added I/O buffering
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*
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* May 26, 1991 Dave Added set EOF
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*
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* Jun 07, 1991 Dave Broke the single source into lots
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* of small sources so we can build
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* a library to use...
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*
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*/
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/*
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* define DEBUG_CODE
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* - add # to define to create the local
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* debug code (IE:module)
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*/
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#ifndef _KS_FILEIO_
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#include "ks.fileio.h"
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#endif
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#pragma noroot
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/* ****************************************************************** *
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* ks_file_close - close an open file. *
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* *
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* History: Oct 13, 1990 Dave Created this routine *
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* ****************************************************************** */
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#define ROUTINE_NAME "ks_file_close"
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KS_E_ERROR ks_file_close(KS_FILE_PTR file_ptr)
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{
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/* ************************************************************** *
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* Local declarations: *
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* ************************************************************** */
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KS_E_ERROR error; /* Holds error codes for subroutines */
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ROUTINE_ENTER();
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/* ************************************************************** *
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* Verify the structure ID passed in is the correct one. *
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* ************************************************************** */
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if (file_ptr->struct_id != KS_FILE_ID)
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{
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KS_ERROR(KS_E_INVALID_STRUCT_ID, KS_FILE_ID);
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};
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/* ************************************************************** *
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* Flush any remaining buffer to disk (if there is a buffer and *
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* we are writing to the file). *
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* ************************************************************** */
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if (file_ptr->buffer_size != NULL)
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{
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if (file_ptr->access == KS_FILE_WRITE_ACCESS)
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{
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if (file_ptr->buffer_offset != 0)
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{
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/* ************************************************** *
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* We have something in a buffer - write the final *
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* buffer to disk. *
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* ************************************************** */
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KSf_pkts.IO.pCount = 4;
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KSf_pkts.IO.refNum = file_ptr->refNum;
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KSf_pkts.IO.dataBuffer = TO_POINTER(file_ptr->buffer);
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KSf_pkts.IO.requestCount = file_ptr->buffer_offset;
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WriteGS(&KSf_pkts.IO);
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if ((error = GET_ERROR()) != KS_E_SUCCESS)
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{
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KS_ERROR(error, KS_FILE_ID);
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};
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}; /* End if there was something in the buffer */
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}; /* End if we were writing to the file */
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/* ********************************************************** *
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* We used buffered I/O on this file - now lets free the *
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* buffer back to free memory. *
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* ********************************************************** */
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KS_MEMORY_DEALLOCATE(file_ptr->buffer_handle,
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error);
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}; /* End if we used buffered I/O to the file */
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/* ************************************************************** *
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* Set up the close packet and close the file. *
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* ************************************************************** */
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KSf_pkts.close.pCount = 1;
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KSf_pkts.close.refNum = file_ptr->refNum;
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CloseGS(&KSf_pkts.close);
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/* ************************************************************** *
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* Clear the FILE structure and give it back to free memory. *
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* ************************************************************** */
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file_ptr->struct_id = 0;
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KS_MEMORY_DEALLOCATE(file_ptr->file_handle,
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error);
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/* ************************************************************** *
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* Return the success back to our caller. *
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* ************************************************************** */
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KS_SUCCESS();
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} /* End of ks_file_close() */
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