60 static void addmapping(register Dosdisc_t *dp)  in addmapping()  argument
62 static void addmapping(dp)  in addmapping()
63 register Dosdisc_t *dp;  in addmapping()
67 	if((n=dp->maptop++)>=dp->mapsize)
69 		dp->mapsize *= 2;
70 		if(!(dp->maptable=(struct map*)realloc((void*)dp->maptable,(dp->mapsize+1)*sizeof(struct map))))
72 			dp->maptop--;
73 			dp->mapsize *= 2;
77 	dp->maptable[n].physical = dp->phere;
78 	dp->maptable[n].logical = dp->lhere;
79 	dp->maptable[dp->maptop].logical=0;
83 static struct map *getmapping(Dosdisc_t *dp, Sfoff_t offset, register int whence)  in getmapping()  argument
85 static struct map *getmapping(dp, offset, whence)  in getmapping()
86 Dosdisc_t *dp;  in getmapping()
93 	if(offset <= dp->begin)
98 	if(!(mp=dp->maptable))
100 		dummy.logical = dp->begin;
118 	register Dosdisc_t *dp = (Dosdisc_t*)disc;  local
121 	if(dp->extra)
123 		dp->extra=0;
124 		*cp = dp->last;
131 		dp->plast=dp->phere;
132 		dp->phere +=n;
133 		dp->llast = dp->lhere;
135 		if(dp->last=='\r' && *cp!='\n')
139 		dp->last = *cpmax;
142 		if(dp->last!='\r')
144 			dp->lhere++;
148 	if(dp->last=='\r')
150 	else if(dp->last!='\n' || cpmax[-1]!='\r')
152 	dp->lhere += n;
159 	dp->skip = cp-1 - (char*)buff;
163 		*cpmax = dp->last;
164 		if(!dp->maptable)
165 			dp->begin +=n;
166 		dp->skip++;
170 	if(!dp->maptable)
172 		dp->begin += cp - (char*)buff-1;
173 		if(dp->maptable=(struct map*)malloc((MINMAP+1)*sizeof(struct map)))
175 			dp->mapsize = MINMAP;
176 			dp->maptable[0].logical=  dp->begin;
177 			dp->maptable[0].physical = dp->maptable[0].logical+1;
178 			dp->maptable[1].logical=0;
179 			dp->maptop = 1;
183 	if(count>dp->bsize)
185 		if(dp->bsize==0)
186 			dp->buff = malloc(count);
188 			dp->buff = realloc(dp->buff,count);
189 		dp->bsize = count;
190 		if(!dp->buff)
193 	memcpy(dp->buff, cp, count);
210 	cpmax[-count] = dp->last;
211 	dp->lhere -= count;
213 	if(dp->lhere>dp->lmax)
215 		dp->lmax = dp->lhere;
216 		dp->pmax = dp->phere;
217 		if(dp->maptable && dp->lmax > dp->maptable[dp->maptop-1].logical+CHUNK)
218 			addmapping(dp);
230 static Sfoff_t cur_offset(Dosdisc_t *dp, Sfoff_t offset,Sfio_t *iop,register int whence)  in cur_offset()  argument
232 static Sfoff_t cur_offset(dp, offset, iop, whence)  in cur_offset()
233 Dosdisc_t *dp;  in cur_offset()
245 		n = offset - dp->plast;
247 		offset =  dp->llast;
252 		n = offset - dp->llast;
253 		offset = dp->plast;
256 	if((n -= dp->skip) > 0)
259 		cp = (char*)dp->buff;
285 	register Dosdisc_t *dp = (Dosdisc_t*)disc;  local
294 		if(offset<=dp->begin)
297 		if(offset==dp->phere)
298 			return(dp->lhere);
299 		else if(offset==dp->plast)
300 			return(dp->llast);
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);
310 		if(!dp->maptable)
313 		mp->physical = dp->plast;
314 		mp->logical = dp->llast;
324 		dp->phere = mp->physical;
325 		dp->lhere = mp->logical;
331 		if(whence==SEEK_CUR && dp->phere>=offset)
333 		if(whence==SEEK_SET && dp->lhere>=offset)
342 				offset = dp->lhere;
350 		offset += dp->lhere;
353 		physical = cur_offset(dp,offset,iop,whence);
357 			dp->phere = physical;
358 			dp->lhere = offset;
376 	register Dosdisc_t *dp = (Dosdisc_t*)disc;  local
379 		if(dp->bsize>0)
380 			free((void*)dp->buff);
381 		if(dp->mapsize)
382 			free((void*)dp->maptable);