1 b3994ec5 2003-12-11 devnull #include <u.h>
  2 b3994ec5 2003-12-11 devnull #include <libc.h>
  3 b3994ec5 2003-12-11 devnull #include <draw.h>
  4 b3994ec5 2003-12-11 devnull #include <thread.h>
  5 b3994ec5 2003-12-11 devnull #include <cursor.h>
  6 b3994ec5 2003-12-11 devnull #include <mouse.h>
  7 b3994ec5 2003-12-11 devnull #include <keyboard.h>
  8 b3994ec5 2003-12-11 devnull #include <frame.h>
  9 b3994ec5 2003-12-11 devnull #include <fcall.h>
 10 b3994ec5 2003-12-11 devnull #include <plumb.h>
 11 67dbeee5 2017-10-10 rsc #include <libsec.h>
 12 b3994ec5 2003-12-11 devnull #include "dat.h"
 13 b3994ec5 2003-12-11 devnull #include "fns.h"
 14 b3994ec5 2003-12-11 devnull #include "edit.h"
 15 b3994ec5 2003-12-11 devnull 
 16 b3994ec5 2003-12-11 devnull static char Wsequence[] = "warning: changes out of sequence\n";
 17 b3994ec5 2003-12-11 devnull static int	warned = FALSE;
 18 b3994ec5 2003-12-11 devnull 
 19 b3994ec5 2003-12-11 devnull /*
 20 b3994ec5 2003-12-11 devnull  * Log of changes made by editing commands.  Three reasons for this:
 21 b3994ec5 2003-12-11 devnull  * 1) We want addresses in commands to apply to old file, not file-in-change.
 22 b3994ec5 2003-12-11 devnull  * 2) It's difficult to track changes correctly as things move, e.g. ,x m$
 23 b3994ec5 2003-12-11 devnull  * 3) This gives an opportunity to optimize by merging adjacent changes.
 24 b3994ec5 2003-12-11 devnull  * It's a little bit like the Undo/Redo log in Files, but Point 3) argues for a
 25 b3994ec5 2003-12-11 devnull  * separate implementation.  To do this well, we use Replace as well as
 26 b3994ec5 2003-12-11 devnull  * Insert and Delete
 27 b3994ec5 2003-12-11 devnull  */
 28 b3994ec5 2003-12-11 devnull 
 29 b3994ec5 2003-12-11 devnull typedef struct Buflog Buflog;
 30 b3994ec5 2003-12-11 devnull struct Buflog
 31 b3994ec5 2003-12-11 devnull {
 32 b3994ec5 2003-12-11 devnull 	short	type;		/* Replace, Filename */
 33 b3994ec5 2003-12-11 devnull 	uint		q0;		/* location of change (unused in f) */
 34 b3994ec5 2003-12-11 devnull 	uint		nd;		/* # runes to delete */
 35 b3994ec5 2003-12-11 devnull 	uint		nr;		/* # runes in string or file name */
 36 b3994ec5 2003-12-11 devnull };
 37 b3994ec5 2003-12-11 devnull 
 38 b3994ec5 2003-12-11 devnull enum
 39 b3994ec5 2003-12-11 devnull {
 40 cbeb0b26 2006-04-01 devnull 	Buflogsize = sizeof(Buflog)/sizeof(Rune)
 41 b3994ec5 2003-12-11 devnull };
 42 b3994ec5 2003-12-11 devnull 
 43 b3994ec5 2003-12-11 devnull /*
 44 b3994ec5 2003-12-11 devnull  * Minstring shouldn't be very big or we will do lots of I/O for small changes.
 45 b3994ec5 2003-12-11 devnull  * Maxstring is RBUFSIZE so we can fbufalloc() once and not realloc elog.r.
 46 b3994ec5 2003-12-11 devnull  */
 47 b3994ec5 2003-12-11 devnull enum
 48 b3994ec5 2003-12-11 devnull {
 49 b3994ec5 2003-12-11 devnull 	Minstring = 16,		/* distance beneath which we merge changes */
 50 cbeb0b26 2006-04-01 devnull 	Maxstring = RBUFSIZE	/* maximum length of change we will merge into one */
 51 b3994ec5 2003-12-11 devnull };
 52 b3994ec5 2003-12-11 devnull 
 53 b3994ec5 2003-12-11 devnull void
 54 b3994ec5 2003-12-11 devnull eloginit(File *f)
 55 b3994ec5 2003-12-11 devnull {
 56 b3994ec5 2003-12-11 devnull 	if(f->elog.type != Empty)
 57 b3994ec5 2003-12-11 devnull 		return;
 58 b3994ec5 2003-12-11 devnull 	f->elog.type = Null;
 59 b3994ec5 2003-12-11 devnull 	if(f->elogbuf == nil)
 60 b3994ec5 2003-12-11 devnull 		f->elogbuf = emalloc(sizeof(Buffer));
 61 b3994ec5 2003-12-11 devnull 	if(f->elog.r == nil)
 62 b3994ec5 2003-12-11 devnull 		f->elog.r = fbufalloc();
 63 b3994ec5 2003-12-11 devnull 	bufreset(f->elogbuf);
 64 b3994ec5 2003-12-11 devnull }
 65 b3994ec5 2003-12-11 devnull 
 66 b3994ec5 2003-12-11 devnull void
 67 b3994ec5 2003-12-11 devnull elogclose(File *f)
 68 b3994ec5 2003-12-11 devnull {
 69 b3994ec5 2003-12-11 devnull 	if(f->elogbuf){
 70 b3994ec5 2003-12-11 devnull 		bufclose(f->elogbuf);
 71 b3994ec5 2003-12-11 devnull 		free(f->elogbuf);
 72 b3994ec5 2003-12-11 devnull 		f->elogbuf = nil;
 73 b3994ec5 2003-12-11 devnull 	}
 74 b3994ec5 2003-12-11 devnull }
 75 b3994ec5 2003-12-11 devnull 
 76 b3994ec5 2003-12-11 devnull void
 77 b3994ec5 2003-12-11 devnull elogreset(File *f)
 78 b3994ec5 2003-12-11 devnull {
 79 b3994ec5 2003-12-11 devnull 	f->elog.type = Null;
 80 b3994ec5 2003-12-11 devnull 	f->elog.nd = 0;
 81 b3994ec5 2003-12-11 devnull 	f->elog.nr = 0;
 82 b3994ec5 2003-12-11 devnull }
 83 b3994ec5 2003-12-11 devnull 
 84 b3994ec5 2003-12-11 devnull void
 85 b3994ec5 2003-12-11 devnull elogterm(File *f)
 86 b3994ec5 2003-12-11 devnull {
 87 b3994ec5 2003-12-11 devnull 	elogreset(f);
 88 b3994ec5 2003-12-11 devnull 	if(f->elogbuf)
 89 b3994ec5 2003-12-11 devnull 		bufreset(f->elogbuf);
 90 b3994ec5 2003-12-11 devnull 	f->elog.type = Empty;
 91 b3994ec5 2003-12-11 devnull 	fbuffree(f->elog.r);
 92 b3994ec5 2003-12-11 devnull 	f->elog.r = nil;
 93 b3994ec5 2003-12-11 devnull 	warned = FALSE;
 94 b3994ec5 2003-12-11 devnull }
 95 b3994ec5 2003-12-11 devnull 
 96 b3994ec5 2003-12-11 devnull void
 97 b3994ec5 2003-12-11 devnull elogflush(File *f)
 98 b3994ec5 2003-12-11 devnull {
 99 b3994ec5 2003-12-11 devnull 	Buflog b;
100 b3994ec5 2003-12-11 devnull 
101 b3994ec5 2003-12-11 devnull 	b.type = f->elog.type;
102 b3994ec5 2003-12-11 devnull 	b.q0 = f->elog.q0;
103 b3994ec5 2003-12-11 devnull 	b.nd = f->elog.nd;
104 b3994ec5 2003-12-11 devnull 	b.nr = f->elog.nr;
105 b3994ec5 2003-12-11 devnull 	switch(f->elog.type){
106 b3994ec5 2003-12-11 devnull 	default:
107 b3994ec5 2003-12-11 devnull 		warning(nil, "unknown elog type 0x%ux\n", f->elog.type);
108 b3994ec5 2003-12-11 devnull 		break;
109 b3994ec5 2003-12-11 devnull 	case Null:
110 b3994ec5 2003-12-11 devnull 		break;
111 b3994ec5 2003-12-11 devnull 	case Insert:
112 b3994ec5 2003-12-11 devnull 	case Replace:
113 b3994ec5 2003-12-11 devnull 		if(f->elog.nr > 0)
114 b3994ec5 2003-12-11 devnull 			bufinsert(f->elogbuf, f->elogbuf->nc, f->elog.r, f->elog.nr);
115 b3994ec5 2003-12-11 devnull 		/* fall through */
116 b3994ec5 2003-12-11 devnull 	case Delete:
117 b3994ec5 2003-12-11 devnull 		bufinsert(f->elogbuf, f->elogbuf->nc, (Rune*)&b, Buflogsize);
118 b3994ec5 2003-12-11 devnull 		break;
119 b3994ec5 2003-12-11 devnull 	}
120 b3994ec5 2003-12-11 devnull 	elogreset(f);
121 b3994ec5 2003-12-11 devnull }
122 b3994ec5 2003-12-11 devnull 
123 b3994ec5 2003-12-11 devnull void
124 b3994ec5 2003-12-11 devnull elogreplace(File *f, int q0, int q1, Rune *r, int nr)
125 b3994ec5 2003-12-11 devnull {
126 b3994ec5 2003-12-11 devnull 	uint gap;
127 b3994ec5 2003-12-11 devnull 
128 b3994ec5 2003-12-11 devnull 	if(q0==q1 && nr==0)
129 b3994ec5 2003-12-11 devnull 		return;
130 b3994ec5 2003-12-11 devnull 	eloginit(f);
131 b3994ec5 2003-12-11 devnull 	if(f->elog.type!=Null && q0<f->elog.q0){
132 b3994ec5 2003-12-11 devnull 		if(warned++ == 0)
133 b3994ec5 2003-12-11 devnull 			warning(nil, Wsequence);
134 b3994ec5 2003-12-11 devnull 		elogflush(f);
135 b3994ec5 2003-12-11 devnull 	}
136 b3994ec5 2003-12-11 devnull 	/* try to merge with previous */
137 b3994ec5 2003-12-11 devnull 	gap = q0 - (f->elog.q0+f->elog.nd);	/* gap between previous and this */
138 b3994ec5 2003-12-11 devnull 	if(f->elog.type==Replace && f->elog.nr+gap+nr<Maxstring){
139 b3994ec5 2003-12-11 devnull 		if(gap < Minstring){
140 b3994ec5 2003-12-11 devnull 			if(gap > 0){
141 b3994ec5 2003-12-11 devnull 				bufread(&f->b, f->elog.q0+f->elog.nd, f->elog.r+f->elog.nr, gap);
142 b3994ec5 2003-12-11 devnull 				f->elog.nr += gap;
143 b3994ec5 2003-12-11 devnull 			}
144 b3994ec5 2003-12-11 devnull 			f->elog.nd += gap + q1-q0;
145 b3994ec5 2003-12-11 devnull 			runemove(f->elog.r+f->elog.nr, r, nr);
146 b3994ec5 2003-12-11 devnull 			f->elog.nr += nr;
147 b3994ec5 2003-12-11 devnull 			return;
148 b3994ec5 2003-12-11 devnull 		}
149 b3994ec5 2003-12-11 devnull 	}
150 b3994ec5 2003-12-11 devnull 	elogflush(f);
151 b3994ec5 2003-12-11 devnull 	f->elog.type = Replace;
152 b3994ec5 2003-12-11 devnull 	f->elog.q0 = q0;
153 b3994ec5 2003-12-11 devnull 	f->elog.nd = q1-q0;
154 b3994ec5 2003-12-11 devnull 	f->elog.nr = nr;
155 b3994ec5 2003-12-11 devnull 	if(nr > RBUFSIZE)
156 b3994ec5 2003-12-11 devnull 		editerror("internal error: replacement string too large(%d)", nr);
157 b3994ec5 2003-12-11 devnull 	runemove(f->elog.r, r, nr);
158 b3994ec5 2003-12-11 devnull }
159 b3994ec5 2003-12-11 devnull 
160 b3994ec5 2003-12-11 devnull void
161 b3994ec5 2003-12-11 devnull eloginsert(File *f, int q0, Rune *r, int nr)
162 b3994ec5 2003-12-11 devnull {
163 b3994ec5 2003-12-11 devnull 	int n;
164 b3994ec5 2003-12-11 devnull 
165 b3994ec5 2003-12-11 devnull 	if(nr == 0)
166 b3994ec5 2003-12-11 devnull 		return;
167 b3994ec5 2003-12-11 devnull 	eloginit(f);
168 b3994ec5 2003-12-11 devnull 	if(f->elog.type!=Null && q0<f->elog.q0){
169 b3994ec5 2003-12-11 devnull 		if(warned++ == 0)
170 b3994ec5 2003-12-11 devnull 			warning(nil, Wsequence);
171 b3994ec5 2003-12-11 devnull 		elogflush(f);
172 b3994ec5 2003-12-11 devnull 	}
173 b3994ec5 2003-12-11 devnull 	/* try to merge with previous */
174 2277c5d7 2004-03-21 devnull 	if(f->elog.type==Insert && q0==f->elog.q0 && f->elog.nr+nr<Maxstring){
175 b3994ec5 2003-12-11 devnull 		runemove(f->elog.r+f->elog.nr, r, nr);
176 b3994ec5 2003-12-11 devnull 		f->elog.nr += nr;
177 b3994ec5 2003-12-11 devnull 		return;
178 b3994ec5 2003-12-11 devnull 	}
179 b3994ec5 2003-12-11 devnull 	while(nr > 0){
180 b3994ec5 2003-12-11 devnull 		elogflush(f);
181 b3994ec5 2003-12-11 devnull 		f->elog.type = Insert;
182 b3994ec5 2003-12-11 devnull 		f->elog.q0 = q0;
183 b3994ec5 2003-12-11 devnull 		n = nr;
184 b3994ec5 2003-12-11 devnull 		if(n > RBUFSIZE)
185 b3994ec5 2003-12-11 devnull 			n = RBUFSIZE;
186 b3994ec5 2003-12-11 devnull 		f->elog.nr = n;
187 b3994ec5 2003-12-11 devnull 		runemove(f->elog.r, r, n);
188 b3994ec5 2003-12-11 devnull 		r += n;
189 b3994ec5 2003-12-11 devnull 		nr -= n;
190 b3994ec5 2003-12-11 devnull 	}
191 b3994ec5 2003-12-11 devnull }
192 b3994ec5 2003-12-11 devnull 
193 b3994ec5 2003-12-11 devnull void
194 b3994ec5 2003-12-11 devnull elogdelete(File *f, int q0, int q1)
195 b3994ec5 2003-12-11 devnull {
196 b3994ec5 2003-12-11 devnull 	if(q0 == q1)
197 b3994ec5 2003-12-11 devnull 		return;
198 b3994ec5 2003-12-11 devnull 	eloginit(f);
199 b3994ec5 2003-12-11 devnull 	if(f->elog.type!=Null && q0<f->elog.q0+f->elog.nd){
200 b3994ec5 2003-12-11 devnull 		if(warned++ == 0)
201 b3994ec5 2003-12-11 devnull 			warning(nil, Wsequence);
202 b3994ec5 2003-12-11 devnull 		elogflush(f);
203 b3994ec5 2003-12-11 devnull 	}
204 b3994ec5 2003-12-11 devnull 	/* try to merge with previous */
205 b3994ec5 2003-12-11 devnull 	if(f->elog.type==Delete && f->elog.q0+f->elog.nd==q0){
206 b3994ec5 2003-12-11 devnull 		f->elog.nd += q1-q0;
207 b3994ec5 2003-12-11 devnull 		return;
208 b3994ec5 2003-12-11 devnull 	}
209 b3994ec5 2003-12-11 devnull 	elogflush(f);
210 b3994ec5 2003-12-11 devnull 	f->elog.type = Delete;
211 b3994ec5 2003-12-11 devnull 	f->elog.q0 = q0;
212 b3994ec5 2003-12-11 devnull 	f->elog.nd = q1-q0;
213 b3994ec5 2003-12-11 devnull }
214 b3994ec5 2003-12-11 devnull 
215 b3994ec5 2003-12-11 devnull #define tracelog 0
216 b3994ec5 2003-12-11 devnull void
217 b3994ec5 2003-12-11 devnull elogapply(File *f)
218 b3994ec5 2003-12-11 devnull {
219 b3994ec5 2003-12-11 devnull 	Buflog b;
220 b3994ec5 2003-12-11 devnull 	Rune *buf;
221 b3994ec5 2003-12-11 devnull 	uint i, n, up, mod;
222 5e77b8bb 2005-03-23 devnull 	uint tq0, tq1;
223 b3994ec5 2003-12-11 devnull 	Buffer *log;
224 b3994ec5 2003-12-11 devnull 	Text *t;
225 f0315273 2008-06-01 rsc 	int owner;
226 b3994ec5 2003-12-11 devnull 
227 b3994ec5 2003-12-11 devnull 	elogflush(f);
228 b3994ec5 2003-12-11 devnull 	log = f->elogbuf;
229 b3994ec5 2003-12-11 devnull 	t = f->curtext;
230 b3994ec5 2003-12-11 devnull 
231 b3994ec5 2003-12-11 devnull 	buf = fbufalloc();
232 b3994ec5 2003-12-11 devnull 	mod = FALSE;
233 b3994ec5 2003-12-11 devnull 
234 f0315273 2008-06-01 rsc 	owner = 0;
235 f0315273 2008-06-01 rsc 	if(t->w){
236 f0315273 2008-06-01 rsc 		owner = t->w->owner;
237 f0315273 2008-06-01 rsc 		if(owner == 0)
238 f0315273 2008-06-01 rsc 			t->w->owner = 'E';
239 f0315273 2008-06-01 rsc 	}
240 f0315273 2008-06-01 rsc 
241 b3994ec5 2003-12-11 devnull 	/*
242 5e77b8bb 2005-03-23 devnull 	 * The edit commands have already updated the selection in t->q0, t->q1,
243 5e77b8bb 2005-03-23 devnull 	 * but using coordinates relative to the unmodified buffer.  As we apply the log,
244 5e77b8bb 2005-03-23 devnull 	 * we have to update the coordinates to be relative to the modified buffer.
245 5e77b8bb 2005-03-23 devnull 	 * Textinsert and textdelete will do this for us; our only work is to apply the
246 fa325e9b 2020-01-10 cross 	 * convention that an insertion at t->q0==t->q1 is intended to select the
247 5e77b8bb 2005-03-23 devnull 	 * inserted text.
248 b3994ec5 2003-12-11 devnull 	 */
249 5e77b8bb 2005-03-23 devnull 
250 b3994ec5 2003-12-11 devnull 	/*
251 b3994ec5 2003-12-11 devnull 	 * We constrain the addresses in here (with textconstrain()) because
252 b3994ec5 2003-12-11 devnull 	 * overlapping changes will generate bogus addresses.   We will warn
253 b3994ec5 2003-12-11 devnull 	 * about changes out of sequence but proceed anyway; here we must
254 b3994ec5 2003-12-11 devnull 	 * keep things in range.
255 b3994ec5 2003-12-11 devnull 	 */
256 b3994ec5 2003-12-11 devnull 
257 b3994ec5 2003-12-11 devnull 	while(log->nc > 0){
258 b3994ec5 2003-12-11 devnull 		up = log->nc-Buflogsize;
259 b3994ec5 2003-12-11 devnull 		bufread(log, up, (Rune*)&b, Buflogsize);
260 b3994ec5 2003-12-11 devnull 		switch(b.type){
261 b3994ec5 2003-12-11 devnull 		default:
262 b3994ec5 2003-12-11 devnull 			fprint(2, "elogapply: 0x%ux\n", b.type);
263 b3994ec5 2003-12-11 devnull 			abort();
264 b3994ec5 2003-12-11 devnull 			break;
265 b3994ec5 2003-12-11 devnull 
266 b3994ec5 2003-12-11 devnull 		case Replace:
267 b3994ec5 2003-12-11 devnull 			if(tracelog)
268 5e77b8bb 2005-03-23 devnull 				warning(nil, "elog replace %d %d (%d %d)\n",
269 5e77b8bb 2005-03-23 devnull 					b.q0, b.q0+b.nd, t->q0, t->q1);
270 b3994ec5 2003-12-11 devnull 			if(!mod){
271 b3994ec5 2003-12-11 devnull 				mod = TRUE;
272 b3994ec5 2003-12-11 devnull 				filemark(f);
273 b3994ec5 2003-12-11 devnull 			}
274 b3994ec5 2003-12-11 devnull 			textconstrain(t, b.q0, b.q0+b.nd, &tq0, &tq1);
275 b3994ec5 2003-12-11 devnull 			textdelete(t, tq0, tq1, TRUE);
276 b3994ec5 2003-12-11 devnull 			up -= b.nr;
277 b3994ec5 2003-12-11 devnull 			for(i=0; i<b.nr; i+=n){
278 b3994ec5 2003-12-11 devnull 				n = b.nr - i;
279 b3994ec5 2003-12-11 devnull 				if(n > RBUFSIZE)
280 b3994ec5 2003-12-11 devnull 					n = RBUFSIZE;
281 b3994ec5 2003-12-11 devnull 				bufread(log, up+i, buf, n);
282 b3994ec5 2003-12-11 devnull 				textinsert(t, tq0+i, buf, n, TRUE);
283 b3994ec5 2003-12-11 devnull 			}
284 5e77b8bb 2005-03-23 devnull 			if(t->q0 == b.q0 && t->q1 == b.q0)
285 5e77b8bb 2005-03-23 devnull 				t->q1 += b.nr;
286 b3994ec5 2003-12-11 devnull 			break;
287 b3994ec5 2003-12-11 devnull 
288 b3994ec5 2003-12-11 devnull 		case Delete:
289 b3994ec5 2003-12-11 devnull 			if(tracelog)
290 5e77b8bb 2005-03-23 devnull 				warning(nil, "elog delete %d %d (%d %d)\n",
291 5e77b8bb 2005-03-23 devnull 					b.q0, b.q0+b.nd, t->q0, t->q1);
292 b3994ec5 2003-12-11 devnull 			if(!mod){
293 b3994ec5 2003-12-11 devnull 				mod = TRUE;
294 b3994ec5 2003-12-11 devnull 				filemark(f);
295 b3994ec5 2003-12-11 devnull 			}
296 b3994ec5 2003-12-11 devnull 			textconstrain(t, b.q0, b.q0+b.nd, &tq0, &tq1);
297 b3994ec5 2003-12-11 devnull 			textdelete(t, tq0, tq1, TRUE);
298 b3994ec5 2003-12-11 devnull 			break;
299 b3994ec5 2003-12-11 devnull 
300 b3994ec5 2003-12-11 devnull 		case Insert:
301 b3994ec5 2003-12-11 devnull 			if(tracelog)
302 5e77b8bb 2005-03-23 devnull 				warning(nil, "elog insert %d %d (%d %d)\n",
303 5e77b8bb 2005-03-23 devnull 					b.q0, b.q0+b.nr, t->q0, t->q1);
304 b3994ec5 2003-12-11 devnull 			if(!mod){
305 b3994ec5 2003-12-11 devnull 				mod = TRUE;
306 b3994ec5 2003-12-11 devnull 				filemark(f);
307 b3994ec5 2003-12-11 devnull 			}
308 b3994ec5 2003-12-11 devnull 			textconstrain(t, b.q0, b.q0, &tq0, &tq1);
309 b3994ec5 2003-12-11 devnull 			up -= b.nr;
310 b3994ec5 2003-12-11 devnull 			for(i=0; i<b.nr; i+=n){
311 b3994ec5 2003-12-11 devnull 				n = b.nr - i;
312 b3994ec5 2003-12-11 devnull 				if(n > RBUFSIZE)
313 b3994ec5 2003-12-11 devnull 					n = RBUFSIZE;
314 b3994ec5 2003-12-11 devnull 				bufread(log, up+i, buf, n);
315 b3994ec5 2003-12-11 devnull 				textinsert(t, tq0+i, buf, n, TRUE);
316 b3994ec5 2003-12-11 devnull 			}
317 5e77b8bb 2005-03-23 devnull 			if(t->q0 == b.q0 && t->q1 == b.q0)
318 5e77b8bb 2005-03-23 devnull 				t->q1 += b.nr;
319 b3994ec5 2003-12-11 devnull 			break;
320 b3994ec5 2003-12-11 devnull 
321 b3994ec5 2003-12-11 devnull /*		case Filename:
322 b3994ec5 2003-12-11 devnull 			f->seq = u.seq;
323 b3994ec5 2003-12-11 devnull 			fileunsetname(f, epsilon);
324 b3994ec5 2003-12-11 devnull 			f->mod = u.mod;
325 b3994ec5 2003-12-11 devnull 			up -= u.n;
326 b3994ec5 2003-12-11 devnull 			free(f->name);
327 b3994ec5 2003-12-11 devnull 			if(u.n == 0)
328 b3994ec5 2003-12-11 devnull 				f->name = nil;
329 b3994ec5 2003-12-11 devnull 			else
330 b3994ec5 2003-12-11 devnull 				f->name = runemalloc(u.n);
331 b3994ec5 2003-12-11 devnull 			bufread(delta, up, f->name, u.n);
332 b3994ec5 2003-12-11 devnull 			f->nname = u.n;
333 b3994ec5 2003-12-11 devnull 			break;
334 b3994ec5 2003-12-11 devnull */
335 b3994ec5 2003-12-11 devnull 		}
336 b3994ec5 2003-12-11 devnull 		bufdelete(log, up, log->nc);
337 b3994ec5 2003-12-11 devnull 	}
338 b3994ec5 2003-12-11 devnull 	fbuffree(buf);
339 b3994ec5 2003-12-11 devnull 	elogterm(f);
340 fa325e9b 2020-01-10 cross 
341 b3994ec5 2003-12-11 devnull 	/*
342 5e77b8bb 2005-03-23 devnull 	 * Bad addresses will cause bufload to crash, so double check.
343 5e77b8bb 2005-03-23 devnull 	 * If changes were out of order, we expect problems so don't complain further.
344 b3994ec5 2003-12-11 devnull 	 */
345 5e77b8bb 2005-03-23 devnull 	if(t->q0 > f->b.nc || t->q1 > f->b.nc || t->q0 > t->q1){
346 5e77b8bb 2005-03-23 devnull 		if(!warned)
347 5e77b8bb 2005-03-23 devnull 			warning(nil, "elogapply: can't happen %d %d %d\n", t->q0, t->q1, f->b.nc);
348 5e77b8bb 2005-03-23 devnull 		t->q1 = min(t->q1, f->b.nc);
349 5e77b8bb 2005-03-23 devnull 		t->q0 = min(t->q0, t->q1);
350 b3994ec5 2003-12-11 devnull 	}
351 f0315273 2008-06-01 rsc 
352 f0315273 2008-06-01 rsc 	if(t->w)
353 f0315273 2008-06-01 rsc 		t->w->owner = owner;
354 b3994ec5 2003-12-11 devnull }