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/***
*drivfree.c - Get the size of a disk
*
* Copyright (c) 1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file has _getdiskfree()
*
*Revision History:
* 08-21-91 PHG Module created for Win32
* 10-24-91 GJF Added LPDWORD casts to make MIPS compiler happy.
* ASSUMES THAT sizeof(unsigned) == sizeof(DWORD).
*
*******************************************************************************/
#include <cruntime.h>
#include <direct.h>
#include <oscalls.h>
/***
*int _getdiskfree(drivenum, diskfree) - get size of a specified disk
*
*Purpose:
* Gets the size of the current or specified disk drive
*
*Entry:
* int drivenum - 0 for current drive, or drive 1-26
*
*Exit:
* returns 0 if succeeds
* returns system error code on error.
*
*Exceptions:
*
*******************************************************************************/
#if !defined(_WIN32_)
#error ERROR - ONLY WIN32 TARGET SUPPORTED!
#endif
unsigned _CALLTYPE1 _getdiskfree(unsigned uDrive, struct _diskfree_t * pdf)
{
char szRoot[] = "?:\\";
char szCur[MAX_PATH];
if (uDrive == 0) {
GetCurrentDirectory(MAX_PATH, szCur);
if ((szCur[0] == '\\') && (szCur[1] == '\\')) {
return (ERROR_INVALID_PARAMETER);
}
szRoot[0] = szCur[0];
}
else if (uDrive > 26) {
return (ERROR_INVALID_PARAMETER);
}
else {
szRoot[0] = (char)uDrive + (char)('A' - 1);
}
if (!GetDiskFreeSpace(szRoot,
(LPDWORD)&(pdf->sectors_per_cluster),
(LPDWORD)&(pdf->bytes_per_sector),
(LPDWORD)&(pdf->avail_clusters),
(LPDWORD)&(pdf->total_clusters))) {
return ((int)GetLastError());
}
return (0);
}
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