Cross Reference: /ast/src/lib/libast/disc/sfdcdos.c

Lines Matching refs:offset
83 static struct map *getmapping(Dosdisc_t *dp, Sfoff_t offset, register int whence)
85 static struct map *getmapping(dp, offset, whence)
87 Sfoff_t offset;
93 	if(offset <= dp->begin)
95 		dummy.logical = dummy.physical = offset;
104 	while((++mp)->logical && (whence==SEEK_CUR?mp->physical:mp->logical) <= offset);
224  * returns the current offset
225  * <offset> must be in the current buffer
226  * if <whence> is SEEK_CUR, physical offset converted to logical offset
227  *  otherwise, logical offset is converted to physical offset
230 static Sfoff_t cur_offset(Dosdisc_t *dp, Sfoff_t offset,Sfio_t *iop,register int whence)
232 static Sfoff_t cur_offset(dp, offset, iop, whence)
234 Sfoff_t offset;
245 		n = offset - dp->plast;
247 		offset =  dp->llast;
252 		n = offset - dp->llast;
253 		offset = dp->plast;
255 	offset +=n;
272 	return(offset+m);
276 static Sfoff_t dos_seek(Sfio_t *iop, Sfoff_t offset, register int whence, Sfdisc_t* disc)
278 static Sfoff_t dos_seek(iop, offset, whence, disc)
280 Sfoff_t offset;
293 		offset = sfsk(iop, (Sfoff_t)0,SEEK_CUR,disc);
294 		if(offset<=dp->begin)
295 			return(offset);
297 		if(offset==dp->phere)
299 		else if(offset==dp->plast)
301 		else if(offset<dp->plast || offset>dp->phere)
302 			mp = getmapping(dp,offset,whence);
306 		if(offset<dp->llast || offset > dp->lhere)
307 			mp = getmapping(dp,offset,whence);
311 			return(sfsk(iop,offset,SEEK_END,disc));
331 		if(whence==SEEK_CUR && dp->phere>=offset)
333 		if(whence==SEEK_SET && dp->lhere>=offset)
340 			if(whence==SEEK_END && offset<0)
342 				offset = dp->lhere;
350 		offset += dp->lhere;
353 		physical = cur_offset(dp,offset,iop,whence);
358 			dp->lhere = offset;
361 			offset = physical;
363 	return(offset);