84 lines
3.5 KiB
C
84 lines
3.5 KiB
C
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/****************************************************************/
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/* */
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/* xstructs.h */
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/* */
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/* Extended DOS 7.0+ structures */
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/* */
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/****************************************************************/
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#ifdef MAIN
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#ifdef VERSION_STRINGS
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static BYTE *XStructs_hRcsId =
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"$Id: xstructs.h 1457 2009-06-26 20:00:41Z bartoldeman $";
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#endif
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#endif
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struct xdpbdata {
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UWORD xdd_dpbsize;
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struct dpb xdd_dpb;
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};
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struct xfreespace {
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UWORD xfs_datasize; /* size of this structure */
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union {
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UWORD requested; /* requested structure version */
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UWORD actual; /* actual structure version */
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} xfs_version;
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ULONG xfs_clussize; /* number of sectors per cluster */
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ULONG xfs_secsize; /* number of bytes per sector */
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ULONG xfs_freeclusters; /* number of available clusters */
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ULONG xfs_totalclusters; /* total number of clusters on the drive */
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ULONG xfs_freesectors; /* number of physical sectors available */
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ULONG xfs_totalsectors; /* total number of physical sectors */
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ULONG xfs_freeunits; /* number of available allocation units */
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ULONG xfs_totalunits; /* total allocation units */
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UBYTE xfs_reserved[8];
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};
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struct xdpbforformat {
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UWORD xdff_datasize; /* size of this structure */
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union {
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UWORD requested; /* requested structure version */
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UWORD actual; /* actual structure version */
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} xdff_version;
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UDWORD xdff_function; /* function number:
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00h invalidate DPB counts
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01h rebuild DPB from BPB
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02h force media change
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03h get/set active FAT number and mirroring
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04h get/set root directory cluster number
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*/
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union {
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struct {
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DWORD nfreeclst; /* # free clusters
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(-1 - unknown, 0 - don't change) */
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DWORD cluster; /* cluster # of first free
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(-1 - unknown, 0 - don't change) */
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UDWORD reserved[2];
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} setdpbcounts;
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struct {
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UDWORD unknown;
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bpb FAR *bpbp;
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UDWORD reserved[2];
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} rebuilddpb;
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struct {
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DWORD new; /* new active FAT/mirroring state, or -1 to get
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bits 3-0: the 0-based FAT number of the active FAT
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bits 6-4: reserved (0)
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bit 7: do not mirror active FAT to inactive FATs
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or:
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set new root directory cluster, -1 - get current
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*/
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DWORD old; /* previous active FAT/mirroring state (as above)
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or
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get previous root directory cluster
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*/
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UDWORD reserved[2];
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} setget;
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} xdff_f;
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};
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COUNT DosGetExtFree(BYTE FAR * DriveString, struct xfreespace FAR * xfsp);
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