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1 line
4.3 KiB
C
1 line
4.3 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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* Space.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_get_volume_space - Return the total/unused space of *
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* the specified volume *
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* *
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* History: Mar 13, 1991 Dave Created this routine *
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* ****************************************************************** */
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#undef ROUTINE_NAME
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#define ROUTINE_NAME "ks_file_get_volume_space"
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KS_E_ERROR ks_file_get_volume_space(GSString255Ptr volume_ptr,
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LongWord *unused_space,
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LongWord *total_space)
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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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* Now lets generate some code that just shouldn't work... *
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* *
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* According to all the reference manuals, GetFileInfo does not *
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* return valid information on volumes or directories. *
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* *
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* The means we have to go back to the ProDOS 16 GET_FILE_INFO *
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* call that does return the volume size and number of allocated *
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* blocks (even if the manuals seem to disagree with this). *
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* *
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* To do a ProDOS 16 call, you have to pass a pascal string... *
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* which is a length byte followed by the string. Now a GS/OS *
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* string is a length word followed by the string. We are going *
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* to cheat once more by making the GS/OS string a Pascal string *
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* for the duration of this call... *
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* *
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* I don't like doing things this way, but the alternative is *
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* very ugly (start by scanning all devices with DInfo, the *
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* get the volume name of each disk device, then compare names *
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* until you find the specified volume, and finally you have *
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* the information for a Volume call). *
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* *
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* We'll cheat now - this may need fixing in the future. *
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* ************************************************************** */
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(((char *) volume_ptr)[1]) = (((char *) volume_ptr)[0]);
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KSf_pkts.fileinfo.pathname = &(((char *) volume_ptr)[1]);
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GET_FILE_INFO(&KSf_pkts.fileinfo);
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(((char *) volume_ptr)[1]) = '\0';
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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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*unused_space = (KSf_pkts.fileinfo.auxType -
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KSf_pkts.fileinfo.blocksUsed) / 2;
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*total_space = (KSf_pkts.fileinfo.auxType) / 2;
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/* ************************************************************** *
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* We'll never reach this part of the code... However, if by *
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* some cosmic reason we do - let us return a success. *
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* ************************************************************** */
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KS_SUCCESS();
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} /* End of ks_file_get_volume_space() */
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