53    if (isOpen) { // file is already open  in OpenForRead()
71          isOpen = 0;  in OpenForRead()
74          isOpen = 0;  in OpenForRead()
88                isOpen = 1;  in OpenForRead()
93    return isOpen;  in OpenForRead()
99    if ((isOpen) && (openForWrite))  in OpenForWrite()
115       isOpen = 1;  in OpenForWrite()
118       isOpen = 0;  in OpenForWrite()
121    return isOpen;  in OpenForWrite()
127    if (isOpen)  in Close()
130    isOpen = 0;  in Close()
144    if (!isOpen) {  in GetBlockSize()
148    if (isOpen) {  in GetBlockSize()
190    if (!isOpen)  in GetNumHeads()
208    if (!isOpen)  in GetNumSecsPerTrack()
226    if (!isOpen) {  in DiskSync()
230    if (isOpen) {  in DiskSync()
279    if (!isOpen) {  in Seek()
283    if (isOpen) {  in Seek()
302    if (!isOpen) {  in Read()
306    if (isOpen) {  in Read()
345    if ((!isOpen) || (!openForWrite)) {  in Write()
349    if (isOpen) {  in Write()
401    if (!isOpen) {  in DiskSize()
405    if (isOpen) {  in DiskSize()