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Reopen closed fcbs, if they were likely to have been opened before. Fixes Time and Magic. Thanks ripsaw

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3676
This commit is contained in:
Peter Veenstra 2011-02-19 19:44:46 +00:00
parent c6c57b40b5
commit f94c0830ce
1 changed files with 10 additions and 0 deletions
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10
src/dos/dos_files.cpp
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@ -991,6 +991,11 @@ Bit8u DOS_FCBRead(Bit16u seg,Bit16u offset,Bit16u recno) {
DOS_FCB fcb(seg,offset);
Bit8u fhandle,cur_rec;Bit16u cur_block,rec_size;
fcb.GetSeqData(fhandle,rec_size);
if (fhandle==0xff && rec_size!=0) {
if (!DOS_FCBOpen(seg,offset)) return FCB_READ_NODATA;
LOG(LOG_FCB,LOG_WARN)("Reopened closed FCB");
fcb.GetSeqData(fhandle,rec_size);
}
fcb.GetRecord(cur_block,cur_rec);
Bit32u pos=((cur_block*128)+cur_rec)*rec_size;
if (!DOS_SeekFile(fhandle,&pos,DOS_SEEK_SET)) return FCB_READ_NODATA;
@ -1013,6 +1018,11 @@ Bit8u DOS_FCBWrite(Bit16u seg,Bit16u offset,Bit16u recno) {
DOS_FCB fcb(seg,offset);
Bit8u fhandle,cur_rec;Bit16u cur_block,rec_size;
fcb.GetSeqData(fhandle,rec_size);
if (fhandle==0xff && rec_size!=0) {
if (!DOS_FCBOpen(seg,offset)) return FCB_READ_NODATA;
LOG(LOG_FCB,LOG_WARN)("Reopened closed FCB");
fcb.GetSeqData(fhandle,rec_size);
}
fcb.GetRecord(cur_block,cur_rec);
Bit32u pos=((cur_block*128)+cur_rec)*rec_size;
if (!DOS_SeekFile(fhandle,&pos,DOS_SEEK_SET)) return FCB_ERR_WRITE;