1 76193d7c 2003-09-30 devnull #include "sam.h"
  2 76193d7c 2003-09-30 devnull /*
  3 76193d7c 2003-09-30 devnull  * GROWDATASIZE must be big enough that all errors go out as Hgrowdata's,
  4 76193d7c 2003-09-30 devnull  * so they will be scrolled into visibility in the ~~sam~~ window (yuck!).
  5 76193d7c 2003-09-30 devnull  */
  6 76193d7c 2003-09-30 devnull #define	GROWDATASIZE	50	/* if size is > this, send data with grow */
  7 76193d7c 2003-09-30 devnull 
  8 76193d7c 2003-09-30 devnull void	rcut(List*, Posn, Posn);
  9 76193d7c 2003-09-30 devnull int	rterm(List*, Posn);
 10 76193d7c 2003-09-30 devnull void	rgrow(List*, Posn, Posn);
 11 76193d7c 2003-09-30 devnull 
 12 76193d7c 2003-09-30 devnull static	Posn	growpos;
 13 76193d7c 2003-09-30 devnull static	Posn	grown;
 14 76193d7c 2003-09-30 devnull static	Posn	shrinkpos;
 15 76193d7c 2003-09-30 devnull static	Posn	shrunk;
 16 76193d7c 2003-09-30 devnull 
 17 76193d7c 2003-09-30 devnull /*
 18 76193d7c 2003-09-30 devnull  * rasp routines inform the terminal of changes to the file.
 19 76193d7c 2003-09-30 devnull  *
 20 76193d7c 2003-09-30 devnull  * a rasp is a list of spans within the file, and an indication
 21 76193d7c 2003-09-30 devnull  * of whether the terminal knows about the span.
 22 76193d7c 2003-09-30 devnull  *
 23 76193d7c 2003-09-30 devnull  * optimize by coalescing multiple updates to the same span
 24 76193d7c 2003-09-30 devnull  * if it is not known by the terminal.
 25 76193d7c 2003-09-30 devnull  *
 26 76193d7c 2003-09-30 devnull  * other possible optimizations: flush terminal's rasp by cut everything,
 27 76193d7c 2003-09-30 devnull  * insert everything if rasp gets too large.
 28 76193d7c 2003-09-30 devnull  */
 29 76193d7c 2003-09-30 devnull 
 30 76193d7c 2003-09-30 devnull /*
 31 76193d7c 2003-09-30 devnull  * only called for initial load of file
 32 76193d7c 2003-09-30 devnull  */
 33 76193d7c 2003-09-30 devnull void
 34 76193d7c 2003-09-30 devnull raspload(File *f)
 35 76193d7c 2003-09-30 devnull {
 36 76193d7c 2003-09-30 devnull 	if(f->rasp == nil)
 37 76193d7c 2003-09-30 devnull 		return;
 38 522b0689 2003-09-30 devnull 	grown = f->b.nc;
 39 76193d7c 2003-09-30 devnull 	growpos = 0;
 40 522b0689 2003-09-30 devnull 	if(f->b.nc)
 41 522b0689 2003-09-30 devnull 		rgrow(f->rasp, 0, f->b.nc);
 42 76193d7c 2003-09-30 devnull 	raspdone(f, 1);
 43 76193d7c 2003-09-30 devnull }
 44 76193d7c 2003-09-30 devnull 
 45 76193d7c 2003-09-30 devnull void
 46 76193d7c 2003-09-30 devnull raspstart(File *f)
 47 76193d7c 2003-09-30 devnull {
 48 76193d7c 2003-09-30 devnull 	if(f->rasp == nil)
 49 76193d7c 2003-09-30 devnull 		return;
 50 76193d7c 2003-09-30 devnull 	grown = 0;
 51 76193d7c 2003-09-30 devnull 	shrunk = 0;
 52 76193d7c 2003-09-30 devnull 	noflush = 1;
 53 76193d7c 2003-09-30 devnull }
 54 76193d7c 2003-09-30 devnull 
 55 76193d7c 2003-09-30 devnull void
 56 76193d7c 2003-09-30 devnull raspdone(File *f, int toterm)
 57 76193d7c 2003-09-30 devnull {
 58 522b0689 2003-09-30 devnull 	if(f->dot.r.p1 > f->b.nc)
 59 522b0689 2003-09-30 devnull 		f->dot.r.p1 = f->b.nc;
 60 522b0689 2003-09-30 devnull 	if(f->dot.r.p2 > f->b.nc)
 61 522b0689 2003-09-30 devnull 		f->dot.r.p2 = f->b.nc;
 62 522b0689 2003-09-30 devnull 	if(f->mark.p1 > f->b.nc)
 63 522b0689 2003-09-30 devnull 		f->mark.p1 = f->b.nc;
 64 522b0689 2003-09-30 devnull 	if(f->mark.p2 > f->b.nc)
 65 522b0689 2003-09-30 devnull 		f->mark.p2 = f->b.nc;
 66 76193d7c 2003-09-30 devnull 	if(f->rasp == nil)
 67 76193d7c 2003-09-30 devnull 		return;
 68 76193d7c 2003-09-30 devnull 	if(grown)
 69 76193d7c 2003-09-30 devnull 		outTsll(Hgrow, f->tag, growpos, grown);
 70 76193d7c 2003-09-30 devnull 	else if(shrunk)
 71 76193d7c 2003-09-30 devnull 		outTsll(Hcut, f->tag, shrinkpos, shrunk);
 72 76193d7c 2003-09-30 devnull 	if(toterm)
 73 76193d7c 2003-09-30 devnull 		outTs(Hcheck0, f->tag);
 74 76193d7c 2003-09-30 devnull 	outflush();
 75 76193d7c 2003-09-30 devnull 	noflush = 0;
 76 76193d7c 2003-09-30 devnull 	if(f == cmd){
 77 76193d7c 2003-09-30 devnull 		cmdpt += cmdptadv;
 78 76193d7c 2003-09-30 devnull 		cmdptadv = 0;
 79 76193d7c 2003-09-30 devnull 	}
 80 76193d7c 2003-09-30 devnull }
 81 76193d7c 2003-09-30 devnull 
 82 76193d7c 2003-09-30 devnull void
 83 76193d7c 2003-09-30 devnull raspdelete(File *f, uint p1, uint p2, int toterm)
 84 76193d7c 2003-09-30 devnull {
 85 76193d7c 2003-09-30 devnull 	long n;
 86 76193d7c 2003-09-30 devnull 
 87 76193d7c 2003-09-30 devnull 	n = p2 - p1;
 88 76193d7c 2003-09-30 devnull 	if(n == 0)
 89 76193d7c 2003-09-30 devnull 		return;
 90 76193d7c 2003-09-30 devnull 
 91 76193d7c 2003-09-30 devnull 	if(p2 <= f->dot.r.p1){
 92 76193d7c 2003-09-30 devnull 		f->dot.r.p1 -= n;
 93 76193d7c 2003-09-30 devnull 		f->dot.r.p2 -= n;
 94 76193d7c 2003-09-30 devnull 	}
 95 76193d7c 2003-09-30 devnull 	if(p2 <= f->mark.p1){
 96 76193d7c 2003-09-30 devnull 		f->mark.p1 -= n;
 97 76193d7c 2003-09-30 devnull 		f->mark.p2 -= n;
 98 76193d7c 2003-09-30 devnull 	}
 99 76193d7c 2003-09-30 devnull 
100 76193d7c 2003-09-30 devnull 	if(f->rasp == nil)
101 76193d7c 2003-09-30 devnull 		return;
102 76193d7c 2003-09-30 devnull 
103 76193d7c 2003-09-30 devnull 	if(f==cmd && p1<cmdpt){
104 76193d7c 2003-09-30 devnull 		if(p2 <= cmdpt)
105 76193d7c 2003-09-30 devnull 			cmdpt -= n;
106 76193d7c 2003-09-30 devnull 		else
107 76193d7c 2003-09-30 devnull 			cmdpt = p1;
108 76193d7c 2003-09-30 devnull 	}
109 76193d7c 2003-09-30 devnull 	if(toterm){
110 76193d7c 2003-09-30 devnull 		if(grown){
111 76193d7c 2003-09-30 devnull 			outTsll(Hgrow, f->tag, growpos, grown);
112 76193d7c 2003-09-30 devnull 			grown = 0;
113 76193d7c 2003-09-30 devnull 		}else if(shrunk && shrinkpos!=p1 && shrinkpos!=p2){
114 76193d7c 2003-09-30 devnull 			outTsll(Hcut, f->tag, shrinkpos, shrunk);
115 76193d7c 2003-09-30 devnull 			shrunk = 0;
116 76193d7c 2003-09-30 devnull 		}
117 76193d7c 2003-09-30 devnull 		if(!shrunk || shrinkpos==p2)
118 76193d7c 2003-09-30 devnull 			shrinkpos = p1;
119 76193d7c 2003-09-30 devnull 		shrunk += n;
120 76193d7c 2003-09-30 devnull 	}
121 76193d7c 2003-09-30 devnull 	rcut(f->rasp, p1, p2);
122 76193d7c 2003-09-30 devnull }
123 76193d7c 2003-09-30 devnull 
124 76193d7c 2003-09-30 devnull void
125 76193d7c 2003-09-30 devnull raspinsert(File *f, uint p1, Rune *buf, uint n, int toterm)
126 76193d7c 2003-09-30 devnull {
127 76193d7c 2003-09-30 devnull 	Range r;
128 76193d7c 2003-09-30 devnull 
129 76193d7c 2003-09-30 devnull 	if(n == 0)
130 76193d7c 2003-09-30 devnull 		return;
131 76193d7c 2003-09-30 devnull 
132 76193d7c 2003-09-30 devnull 	if(p1 < f->dot.r.p1){
133 76193d7c 2003-09-30 devnull 		f->dot.r.p1 += n;
134 76193d7c 2003-09-30 devnull 		f->dot.r.p2 += n;
135 76193d7c 2003-09-30 devnull 	}
136 76193d7c 2003-09-30 devnull 	if(p1 < f->mark.p1){
137 76193d7c 2003-09-30 devnull 		f->mark.p1 += n;
138 76193d7c 2003-09-30 devnull 		f->mark.p2 += n;
139 76193d7c 2003-09-30 devnull 	}
140 76193d7c 2003-09-30 devnull 
141 76193d7c 2003-09-30 devnull 
142 76193d7c 2003-09-30 devnull 	if(f->rasp == nil)
143 76193d7c 2003-09-30 devnull 		return;
144 76193d7c 2003-09-30 devnull 	if(f==cmd && p1<cmdpt)
145 76193d7c 2003-09-30 devnull 		cmdpt += n;
146 76193d7c 2003-09-30 devnull 	if(toterm){
147 76193d7c 2003-09-30 devnull 		if(shrunk){
148 76193d7c 2003-09-30 devnull 			outTsll(Hcut, f->tag, shrinkpos, shrunk);
149 76193d7c 2003-09-30 devnull 			shrunk = 0;
150 76193d7c 2003-09-30 devnull 		}
151 76193d7c 2003-09-30 devnull 		if(n>GROWDATASIZE || !rterm(f->rasp, p1)){
152 76193d7c 2003-09-30 devnull 			rgrow(f->rasp, p1, n);
153 76193d7c 2003-09-30 devnull 			if(grown && growpos+grown!=p1 && growpos!=p1){
154 76193d7c 2003-09-30 devnull 				outTsll(Hgrow, f->tag, growpos, grown);
155 76193d7c 2003-09-30 devnull 				grown = 0;
156 76193d7c 2003-09-30 devnull 			}
157 76193d7c 2003-09-30 devnull 			if(!grown)
158 76193d7c 2003-09-30 devnull 				growpos = p1;
159 76193d7c 2003-09-30 devnull 			grown += n;
160 76193d7c 2003-09-30 devnull 		}else{
161 76193d7c 2003-09-30 devnull 			if(grown){
162 76193d7c 2003-09-30 devnull 				outTsll(Hgrow, f->tag, growpos, grown);
163 76193d7c 2003-09-30 devnull 				grown = 0;
164 76193d7c 2003-09-30 devnull 			}
165 76193d7c 2003-09-30 devnull 			rgrow(f->rasp, p1, n);
166 76193d7c 2003-09-30 devnull 			r = rdata(f->rasp, p1, n);
167 76193d7c 2003-09-30 devnull 			if(r.p1!=p1 || r.p2!=p1+n)
168 76193d7c 2003-09-30 devnull 				panic("rdata in toterminal");
169 76193d7c 2003-09-30 devnull 			outTsllS(Hgrowdata, f->tag, p1, n, tmprstr(buf, n));
170 76193d7c 2003-09-30 devnull 		}
171 76193d7c 2003-09-30 devnull 	}else{
172 76193d7c 2003-09-30 devnull 		rgrow(f->rasp, p1, n);
173 76193d7c 2003-09-30 devnull 		r = rdata(f->rasp, p1, n);
174 76193d7c 2003-09-30 devnull 		if(r.p1!=p1 || r.p2!=p1+n)
175 76193d7c 2003-09-30 devnull 			panic("rdata in toterminal");
176 76193d7c 2003-09-30 devnull 	}
177 76193d7c 2003-09-30 devnull }
178 76193d7c 2003-09-30 devnull 
179 76193d7c 2003-09-30 devnull #define	M	0x80000000L
180 76193d7c 2003-09-30 devnull #define	P(i)	r->longptr[i]
181 76193d7c 2003-09-30 devnull #define	T(i)	(P(i)&M)	/* in terminal */
182 76193d7c 2003-09-30 devnull #define	L(i)	(P(i)&~M)	/* length of this piece */
183 76193d7c 2003-09-30 devnull 
184 76193d7c 2003-09-30 devnull void
185 76193d7c 2003-09-30 devnull rcut(List *r, Posn p1, Posn p2)
186 76193d7c 2003-09-30 devnull {
187 76193d7c 2003-09-30 devnull 	Posn p, x;
188 76193d7c 2003-09-30 devnull 	int i;
189 76193d7c 2003-09-30 devnull 
190 76193d7c 2003-09-30 devnull 	if(p1 == p2)
191 76193d7c 2003-09-30 devnull 		panic("rcut 0");
192 76193d7c 2003-09-30 devnull 	for(p=0,i=0; i<r->nused && p+L(i)<=p1; p+=L(i++))
193 76193d7c 2003-09-30 devnull 		;
194 76193d7c 2003-09-30 devnull 	if(i == r->nused)
195 76193d7c 2003-09-30 devnull 		panic("rcut 1");
196 76193d7c 2003-09-30 devnull 	if(p < p1){	/* chop this piece */
197 76193d7c 2003-09-30 devnull 		if(p+L(i) < p2){
198 76193d7c 2003-09-30 devnull 			x = p1-p;
199 76193d7c 2003-09-30 devnull 			p += L(i);
200 76193d7c 2003-09-30 devnull 		}else{
201 76193d7c 2003-09-30 devnull 			x = L(i)-(p2-p1);
202 76193d7c 2003-09-30 devnull 			p = p2;
203 76193d7c 2003-09-30 devnull 		}
204 76193d7c 2003-09-30 devnull 		if(T(i))
205 76193d7c 2003-09-30 devnull 			P(i) = x|M;
206 76193d7c 2003-09-30 devnull 		else
207 76193d7c 2003-09-30 devnull 			P(i) = x;
208 76193d7c 2003-09-30 devnull 		i++;
209 76193d7c 2003-09-30 devnull 	}
210 76193d7c 2003-09-30 devnull 	while(i<r->nused && p+L(i)<=p2){
211 76193d7c 2003-09-30 devnull 		p += L(i);
212 76193d7c 2003-09-30 devnull 		dellist(r, i);
213 76193d7c 2003-09-30 devnull 	}
214 76193d7c 2003-09-30 devnull 	if(p < p2){
215 76193d7c 2003-09-30 devnull 		if(i == r->nused)
216 76193d7c 2003-09-30 devnull 			panic("rcut 2");
217 76193d7c 2003-09-30 devnull 		x = L(i)-(p2-p);
218 76193d7c 2003-09-30 devnull 		if(T(i))
219 76193d7c 2003-09-30 devnull 			P(i) = x|M;
220 76193d7c 2003-09-30 devnull 		else
221 76193d7c 2003-09-30 devnull 			P(i) = x;
222 76193d7c 2003-09-30 devnull 	}
223 76193d7c 2003-09-30 devnull 	/* can we merge i and i-1 ? */
224 76193d7c 2003-09-30 devnull 	if(i>0 && i<r->nused && T(i-1)==T(i)){
225 76193d7c 2003-09-30 devnull 		x = L(i-1)+L(i);
226 76193d7c 2003-09-30 devnull 		dellist(r, i--);
227 76193d7c 2003-09-30 devnull 		if(T(i))
228 76193d7c 2003-09-30 devnull 			P(i)=x|M;
229 76193d7c 2003-09-30 devnull 		else
230 76193d7c 2003-09-30 devnull 			P(i)=x;
231 76193d7c 2003-09-30 devnull 	}
232 76193d7c 2003-09-30 devnull }
233 76193d7c 2003-09-30 devnull 
234 76193d7c 2003-09-30 devnull void
235 76193d7c 2003-09-30 devnull rgrow(List *r, Posn p1, Posn n)
236 76193d7c 2003-09-30 devnull {
237 76193d7c 2003-09-30 devnull 	Posn p;
238 76193d7c 2003-09-30 devnull 	int i;
239 76193d7c 2003-09-30 devnull 
240 76193d7c 2003-09-30 devnull 	if(n == 0)
241 76193d7c 2003-09-30 devnull 		panic("rgrow 0");
242 76193d7c 2003-09-30 devnull 	for(p=0,i=0; i<r->nused && p+L(i)<=p1; p+=L(i++))
243 76193d7c 2003-09-30 devnull 		;
244 76193d7c 2003-09-30 devnull 	if(i == r->nused){	/* stick on end of file */
245 76193d7c 2003-09-30 devnull 		if(p!=p1)
246 76193d7c 2003-09-30 devnull 			panic("rgrow 1");
247 76193d7c 2003-09-30 devnull 		if(i>0 && !T(i-1))
248 76193d7c 2003-09-30 devnull 			P(i-1)+=n;
249 76193d7c 2003-09-30 devnull 		else
250 76193d7c 2003-09-30 devnull 			inslist(r, i, n);
251 76193d7c 2003-09-30 devnull 	}else if(!T(i))		/* goes in this empty piece */
252 76193d7c 2003-09-30 devnull 		P(i)+=n;
253 76193d7c 2003-09-30 devnull 	else if(p==p1 && i>0 && !T(i-1))	/* special case; simplifies life */
254 76193d7c 2003-09-30 devnull 		P(i-1)+=n;
255 76193d7c 2003-09-30 devnull 	else if(p==p1)
256 76193d7c 2003-09-30 devnull 		inslist(r, i, n);
257 76193d7c 2003-09-30 devnull 	else{			/* must break piece in terminal */
258 76193d7c 2003-09-30 devnull 		inslist(r, i+1, (L(i)-(p1-p))|M);
259 76193d7c 2003-09-30 devnull 		inslist(r, i+1, n);
260 76193d7c 2003-09-30 devnull 		P(i) = (p1-p)|M;
261 76193d7c 2003-09-30 devnull 	}
262 76193d7c 2003-09-30 devnull }
263 76193d7c 2003-09-30 devnull 
264 76193d7c 2003-09-30 devnull int
265 76193d7c 2003-09-30 devnull rterm(List *r, Posn p1)
266 76193d7c 2003-09-30 devnull {
267 76193d7c 2003-09-30 devnull 	Posn p;
268 76193d7c 2003-09-30 devnull 	int i;
269 76193d7c 2003-09-30 devnull 
270 76193d7c 2003-09-30 devnull 	for(p = 0,i = 0; i<r->nused && p+L(i)<=p1; p+=L(i++))
271 76193d7c 2003-09-30 devnull 		;
272 76193d7c 2003-09-30 devnull 	if(i==r->nused && (i==0 || !T(i-1)))
273 76193d7c 2003-09-30 devnull 		return 0;
274 76193d7c 2003-09-30 devnull 	return T(i);
275 76193d7c 2003-09-30 devnull }
276 76193d7c 2003-09-30 devnull 
277 76193d7c 2003-09-30 devnull Range
278 76193d7c 2003-09-30 devnull rdata(List *r, Posn p1, Posn n)
279 76193d7c 2003-09-30 devnull {
280 76193d7c 2003-09-30 devnull 	Posn p;
281 76193d7c 2003-09-30 devnull 	int i;
282 76193d7c 2003-09-30 devnull 	Range rg;
283 76193d7c 2003-09-30 devnull 
284 76193d7c 2003-09-30 devnull 	if(n==0)
285 76193d7c 2003-09-30 devnull 		panic("rdata 0");
286 76193d7c 2003-09-30 devnull 	for(p = 0,i = 0; i<r->nused && p+L(i)<=p1; p+=L(i++))
287 76193d7c 2003-09-30 devnull 		;
288 76193d7c 2003-09-30 devnull 	if(i==r->nused)
289 76193d7c 2003-09-30 devnull 		panic("rdata 1");
290 76193d7c 2003-09-30 devnull 	if(T(i)){
291 76193d7c 2003-09-30 devnull 		n-=L(i)-(p1-p);
292 76193d7c 2003-09-30 devnull 		if(n<=0){
293 76193d7c 2003-09-30 devnull 			rg.p1 = rg.p2 = p1;
294 76193d7c 2003-09-30 devnull 			return rg;
295 76193d7c 2003-09-30 devnull 		}
296 76193d7c 2003-09-30 devnull 		p+=L(i++);
297 76193d7c 2003-09-30 devnull 		p1 = p;
298 76193d7c 2003-09-30 devnull 	}
299 76193d7c 2003-09-30 devnull 	if(T(i) || i==r->nused)
300 76193d7c 2003-09-30 devnull 		panic("rdata 2");
301 76193d7c 2003-09-30 devnull 	if(p+L(i)<p1+n)
302 76193d7c 2003-09-30 devnull 		n = L(i)-(p1-p);
303 76193d7c 2003-09-30 devnull 	rg.p1 = p1;
304 76193d7c 2003-09-30 devnull 	rg.p2 = p1+n;
305 76193d7c 2003-09-30 devnull 	if(p!=p1){
306 76193d7c 2003-09-30 devnull 		inslist(r, i+1, L(i)-(p1-p));
307 76193d7c 2003-09-30 devnull 		P(i)=p1-p;
308 76193d7c 2003-09-30 devnull 		i++;
309 76193d7c 2003-09-30 devnull 	}
310 76193d7c 2003-09-30 devnull 	if(L(i)!=n){
311 76193d7c 2003-09-30 devnull 		inslist(r, i+1, L(i)-n);
312 76193d7c 2003-09-30 devnull 		P(i)=n;
313 76193d7c 2003-09-30 devnull 	}
314 76193d7c 2003-09-30 devnull 	P(i)|=M;
315 76193d7c 2003-09-30 devnull 	/* now i is set; can we merge? */
316 76193d7c 2003-09-30 devnull 	if(i<r->nused-1 && T(i+1)){
317 76193d7c 2003-09-30 devnull 		P(i)=(n+=L(i+1))|M;
318 76193d7c 2003-09-30 devnull 		dellist(r, i+1);
319 76193d7c 2003-09-30 devnull 	}
320 76193d7c 2003-09-30 devnull 	if(i>0 && T(i-1)){
321 76193d7c 2003-09-30 devnull 		P(i)=(n+L(i-1))|M;
322 76193d7c 2003-09-30 devnull 		dellist(r, i-1);
323 76193d7c 2003-09-30 devnull 	}
324 76193d7c 2003-09-30 devnull 	return rg;
325 76193d7c 2003-09-30 devnull }