Commit | Line | Data |
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632a8dd6 | 1 | /* Calculate what line insertion or deletion to do, and do it, |
429ab54e | 2 | Copyright (C) 1985, 1986, 1990, 1993, 1994, 2001, 2002, 2003, 2004, |
114f9c96 | 3 | 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
632a8dd6 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
632a8dd6 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
632a8dd6 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
632a8dd6 JB |
19 | |
20 | ||
18160b98 | 21 | #include <config.h> |
89700111 GM |
22 | #include <stdio.h> |
23 | #include <string.h> | |
d7306fe6 | 24 | #include <setjmp.h> |
9628b887 | 25 | #include "lisp.h" |
632a8dd6 | 26 | #include "termchar.h" |
632a8dd6 | 27 | #include "dispextern.h" |
2538fae4 | 28 | #include "keyboard.h" |
0137dbf7 | 29 | #include "frame.h" |
89700111 | 30 | #include "window.h" |
daf01701 | 31 | #include "termhooks.h" |
632a8dd6 | 32 | |
632a8dd6 | 33 | /* All costs measured in characters. |
0137dbf7 | 34 | So no cost can exceed the area of a frame, measured in characters. |
61df1a5e | 35 | Let's hope this is never more than 1000000 characters. */ |
632a8dd6 | 36 | |
61df1a5e | 37 | #define INFINITY 1000000 |
632a8dd6 JB |
38 | |
39 | struct matrix_elt | |
40 | { | |
41 | /* Cost of outputting through this line | |
42 | if no insert/delete is done just above it. */ | |
61df1a5e | 43 | int writecost; |
632a8dd6 JB |
44 | /* Cost of outputting through this line |
45 | if an insert is done just above it. */ | |
61df1a5e | 46 | int insertcost; |
632a8dd6 JB |
47 | /* Cost of outputting through this line |
48 | if a delete is done just above it. */ | |
61df1a5e | 49 | int deletecost; |
632a8dd6 JB |
50 | /* Number of inserts so far in this run of inserts, |
51 | for the cost in insertcost. */ | |
61df1a5e | 52 | unsigned char insertcount; |
632a8dd6 JB |
53 | /* Number of deletes so far in this run of deletes, |
54 | for the cost in deletecost. */ | |
61df1a5e | 55 | unsigned char deletecount; |
1af1b1e8 RS |
56 | /* Number of writes so far since the last insert |
57 | or delete for the cost in writecost. */ | |
58 | unsigned char writecount; | |
632a8dd6 JB |
59 | }; |
60 | ||
385ed61f KL |
61 | static void do_direct_scrolling P_ ((struct frame *, |
62 | struct glyph_matrix *, | |
89700111 GM |
63 | struct matrix_elt *, |
64 | int, int)); | |
385ed61f KL |
65 | static void do_scrolling P_ ((struct frame *, |
66 | struct glyph_matrix *, | |
89700111 GM |
67 | struct matrix_elt *, |
68 | int, int)); | |
69 | ||
632a8dd6 | 70 | \f |
1af1b1e8 RS |
71 | /* Determine, in matrix[i,j], the cost of updating the first j old |
72 | lines into the first i new lines using the general scrolling method. | |
632a8dd6 JB |
73 | This involves using insert or delete somewhere if i != j. |
74 | For each matrix elements, three kinds of costs are recorded: | |
75 | the smallest cost that ends with an insert, the smallest | |
76 | cost that ends with a delete, and the smallest cost that | |
77 | ends with neither one. These are kept separate because | |
78 | on some terminals the cost of doing an insert varies | |
79 | depending on whether one was just done, etc. */ | |
80 | ||
81 | /* draw_cost[VPOS] is the cost of outputting new line at VPOS. | |
82 | old_hash[VPOS] is the hash code of the old line at VPOS. | |
83 | new_hash[VPOS] is the hash code of the new line at VPOS. | |
0137dbf7 | 84 | Note that these are not true frame vpos's, but relative |
632a8dd6 JB |
85 | to the place at which the first mismatch between old and |
86 | new contents appears. */ | |
87 | ||
88 | static void | |
0137dbf7 | 89 | calculate_scrolling (frame, matrix, window_size, lines_below, |
632a8dd6 JB |
90 | draw_cost, old_hash, new_hash, |
91 | free_at_end) | |
0137dbf7 | 92 | FRAME_PTR frame; |
632a8dd6 JB |
93 | /* matrix is of size window_size + 1 on each side. */ |
94 | struct matrix_elt *matrix; | |
250368af | 95 | int window_size, lines_below; |
632a8dd6 JB |
96 | int *draw_cost; |
97 | int *old_hash; | |
98 | int *new_hash; | |
99 | int free_at_end; | |
100 | { | |
101 | register int i, j; | |
9882535b | 102 | int frame_lines = FRAME_LINES (frame); |
632a8dd6 JB |
103 | register struct matrix_elt *p, *p1; |
104 | register int cost, cost1; | |
105 | ||
8a56675d | 106 | int lines_moved = window_size |
daf01701 | 107 | + (FRAME_SCROLL_REGION_OK (frame) ? 0 : lines_below); |
632a8dd6 | 108 | /* first_insert_cost[I] is the cost of doing the first insert-line |
89700111 | 109 | at the i'th line of the lines we are considering, |
632a8dd6 JB |
110 | where I is origin 1 (as it is below). */ |
111 | int *first_insert_cost | |
9882535b | 112 | = &FRAME_INSERT_COST (frame)[frame_lines - 1 - lines_moved]; |
632a8dd6 | 113 | int *first_delete_cost |
9882535b | 114 | = &FRAME_DELETE_COST (frame)[frame_lines - 1 - lines_moved]; |
632a8dd6 | 115 | int *next_insert_cost |
9882535b | 116 | = &FRAME_INSERTN_COST (frame)[frame_lines - 1 - lines_moved]; |
632a8dd6 | 117 | int *next_delete_cost |
9882535b | 118 | = &FRAME_DELETEN_COST (frame)[frame_lines - 1 - lines_moved]; |
632a8dd6 JB |
119 | |
120 | /* Discourage long scrolls on fast lines. | |
0137dbf7 | 121 | Don't scroll nearly a full frame height unless it saves |
632a8dd6 | 122 | at least 1/4 second. */ |
9882535b | 123 | int extra_cost = baud_rate / (10 * 4 * FRAME_LINES (frame)); |
632a8dd6 | 124 | |
7fb08f69 RS |
125 | if (baud_rate <= 0) |
126 | extra_cost = 1; | |
127 | ||
632a8dd6 JB |
128 | /* initialize the top left corner of the matrix */ |
129 | matrix->writecost = 0; | |
130 | matrix->insertcost = INFINITY; | |
131 | matrix->deletecost = INFINITY; | |
132 | matrix->insertcount = 0; | |
133 | matrix->deletecount = 0; | |
134 | ||
135 | /* initialize the left edge of the matrix */ | |
136 | cost = first_insert_cost[1] - next_insert_cost[1]; | |
137 | for (i = 1; i <= window_size; i++) | |
138 | { | |
139 | p = matrix + i * (window_size + 1); | |
140 | cost += draw_cost[i] + next_insert_cost[i] + extra_cost; | |
141 | p->insertcost = cost; | |
142 | p->writecost = INFINITY; | |
143 | p->deletecost = INFINITY; | |
144 | p->insertcount = i; | |
145 | p->deletecount = 0; | |
146 | } | |
147 | ||
148 | /* initialize the top edge of the matrix */ | |
149 | cost = first_delete_cost[1] - next_delete_cost[1]; | |
150 | for (j = 1; j <= window_size; j++) | |
151 | { | |
152 | cost += next_delete_cost[j]; | |
153 | matrix[j].deletecost = cost; | |
154 | matrix[j].writecost = INFINITY; | |
155 | matrix[j].insertcost = INFINITY; | |
156 | matrix[j].deletecount = j; | |
157 | matrix[j].insertcount = 0; | |
158 | } | |
159 | ||
0137dbf7 JB |
160 | /* `i' represents the vpos among new frame contents. |
161 | `j' represents the vpos among the old frame contents. */ | |
632a8dd6 JB |
162 | p = matrix + window_size + 2; /* matrix [1, 1] */ |
163 | for (i = 1; i <= window_size; i++, p++) | |
164 | for (j = 1; j <= window_size; j++, p++) | |
165 | { | |
166 | /* p contains the address of matrix [i, j] */ | |
167 | ||
168 | /* First calculate the cost assuming we do | |
169 | not insert or delete above this line. | |
170 | That is, if we update through line i-1 | |
171 | based on old lines through j-1, | |
172 | and then just change old line j to new line i. */ | |
173 | p1 = p - window_size - 2; /* matrix [i-1, j-1] */ | |
174 | cost = p1->writecost; | |
175 | if (cost > p1->insertcost) | |
176 | cost = p1->insertcost; | |
177 | if (cost > p1->deletecost) | |
178 | cost = p1->deletecost; | |
179 | if (old_hash[j] != new_hash[i]) | |
180 | cost += draw_cost[i]; | |
181 | p->writecost = cost; | |
182 | ||
183 | /* Calculate the cost if we do an insert-line | |
184 | before outputting this line. | |
185 | That is, we update through line i-1 | |
186 | based on old lines through j, | |
187 | do an insert-line on line i, | |
188 | and then output line i from scratch, | |
189 | leaving old lines starting from j for reuse below. */ | |
190 | p1 = p - window_size - 1; /* matrix [i-1, j] */ | |
191 | /* No need to think about doing a delete followed | |
192 | immediately by an insert. It cannot be as good | |
193 | as not doing either of them. */ | |
194 | if (free_at_end == i) | |
195 | { | |
196 | cost = p1->writecost; | |
197 | cost1 = p1->insertcost; | |
198 | } | |
199 | else | |
200 | { | |
201 | cost = p1->writecost + first_insert_cost[i]; | |
0fe4741d | 202 | if ((int) p1->insertcount > i) |
632a8dd6 JB |
203 | abort (); |
204 | cost1 = p1->insertcost + next_insert_cost[i - p1->insertcount]; | |
205 | } | |
206 | p->insertcost = min (cost, cost1) + draw_cost[i] + extra_cost; | |
207 | p->insertcount = (cost < cost1) ? 1 : p1->insertcount + 1; | |
0fe4741d | 208 | if ((int) p->insertcount > i) |
632a8dd6 JB |
209 | abort (); |
210 | ||
211 | /* Calculate the cost if we do a delete line after | |
212 | outputting this line. | |
213 | That is, we update through line i | |
214 | based on old lines through j-1, | |
215 | and throw away old line j. */ | |
216 | p1 = p - 1; /* matrix [i, j-1] */ | |
217 | /* No need to think about doing an insert followed | |
218 | immediately by a delete. */ | |
219 | if (free_at_end == i) | |
220 | { | |
221 | cost = p1->writecost; | |
222 | cost1 = p1->deletecost; | |
223 | } | |
224 | else | |
225 | { | |
226 | cost = p1->writecost + first_delete_cost[i]; | |
227 | cost1 = p1->deletecost + next_delete_cost[i]; | |
228 | } | |
229 | p->deletecost = min (cost, cost1); | |
230 | p->deletecount = (cost < cost1) ? 1 : p1->deletecount + 1; | |
231 | } | |
232 | } | |
89700111 GM |
233 | |
234 | ||
632a8dd6 | 235 | \f |
89700111 GM |
236 | /* Perform insert-lines and delete-lines operations on CURRENT_MATRIX |
237 | according to the costs in MATRIX, using the general scrolling | |
238 | method that is used if the terminal does not support the setting of | |
177c0ea7 | 239 | scroll windows (scroll_region_ok == 0). |
2d810f84 RS |
240 | |
241 | WINDOW_SIZE is the number of lines being considered for scrolling | |
89700111 GM |
242 | and UNCHANGED_AT_TOP is the vpos of the first line being |
243 | considered. These two arguments can specify any contiguous range | |
244 | of lines. */ | |
177c0ea7 | 245 | |
632a8dd6 | 246 | static void |
385ed61f KL |
247 | do_scrolling (frame, current_matrix, matrix, window_size, unchanged_at_top) |
248 | struct frame *frame; | |
89700111 | 249 | struct glyph_matrix *current_matrix; |
632a8dd6 JB |
250 | struct matrix_elt *matrix; |
251 | int window_size; | |
252 | int unchanged_at_top; | |
253 | { | |
89700111 GM |
254 | struct matrix_elt *p; |
255 | int i, j, k; | |
256 | ||
257 | /* Set to 1 if we have set a terminal window with | |
258 | set_terminal_window. */ | |
259 | int terminal_window_p = 0; | |
260 | ||
261 | /* A queue for line insertions to be done. */ | |
262 | struct queue { int count, pos; }; | |
263 | struct queue *queue_start | |
264 | = (struct queue *) alloca (current_matrix->nrows * sizeof (struct queue)); | |
265 | struct queue *queue = queue_start; | |
177c0ea7 | 266 | |
89700111 GM |
267 | char *retained_p = (char *) alloca (window_size * sizeof (char)); |
268 | int *copy_from = (int *) alloca (window_size * sizeof (int)); | |
269 | ||
270 | /* Zero means line is empty. */ | |
271 | bzero (retained_p, window_size * sizeof (char)); | |
272 | for (k = 0; k < window_size; ++k) | |
273 | copy_from[k] = -1; | |
274 | ||
b96f9fb7 | 275 | #define CHECK_BOUNDS \ |
89700111 GM |
276 | do \ |
277 | { \ | |
278 | int k; \ | |
279 | for (k = 0; k < window_size; ++k) \ | |
280 | xassert (copy_from[k] == -1 \ | |
281 | || (copy_from[k] >= 0 && copy_from[k] < window_size)); \ | |
282 | } \ | |
283 | while (0); | |
284 | ||
285 | /* When j is advanced, this corresponds to deleted lines. | |
286 | When i is advanced, this corresponds to inserted lines. */ | |
632a8dd6 | 287 | i = j = window_size; |
632a8dd6 JB |
288 | while (i > 0 || j > 0) |
289 | { | |
290 | p = matrix + i * (window_size + 1) + j; | |
177c0ea7 | 291 | |
89700111 | 292 | if (p->insertcost < p->writecost && p->insertcost < p->deletecost) |
632a8dd6 | 293 | { |
89700111 GM |
294 | /* Insert should be done at vpos i-1, plus maybe some before. |
295 | Queue the screen operation to be performed. */ | |
296 | queue->count = p->insertcount; | |
297 | queue->pos = i + unchanged_at_top - p->insertcount; | |
298 | ++queue; | |
299 | ||
300 | /* By incrementing I, we leave room in the result rows | |
301 | for the empty rows opened up. */ | |
632a8dd6 | 302 | i -= p->insertcount; |
632a8dd6 JB |
303 | } |
304 | else if (p->deletecost < p->writecost) | |
305 | { | |
89700111 GM |
306 | /* Old line at vpos j-1, and maybe some before it, should be |
307 | deleted. By decrementing J, we skip some lines in the | |
308 | temp_rows which is equivalent to omitting these lines in | |
309 | the result rows, thus deleting them. */ | |
632a8dd6 | 310 | j -= p->deletecount; |
89700111 GM |
311 | |
312 | /* Set the terminal window, if not done already. */ | |
313 | if (! terminal_window_p) | |
632a8dd6 | 314 | { |
385ed61f | 315 | set_terminal_window (frame, window_size + unchanged_at_top); |
89700111 | 316 | terminal_window_p = 1; |
632a8dd6 | 317 | } |
89700111 GM |
318 | |
319 | /* Delete lines on the terminal. */ | |
385ed61f | 320 | ins_del_lines (frame, j + unchanged_at_top, - p->deletecount); |
632a8dd6 JB |
321 | } |
322 | else | |
323 | { | |
89700111 GM |
324 | /* Best thing done here is no insert or delete, i.e. a write. */ |
325 | --i, --j; | |
326 | xassert (i >= 0 && i < window_size); | |
327 | xassert (j >= 0 && j < window_size); | |
328 | copy_from[i] = j; | |
329 | retained_p[j] = 1; | |
330 | ||
331 | #if GLYPH_DEBUG | |
b96f9fb7 | 332 | CHECK_BOUNDS; |
89700111 | 333 | #endif |
632a8dd6 JB |
334 | } |
335 | } | |
336 | ||
89700111 GM |
337 | /* Now do all insertions queued above. */ |
338 | if (queue > queue_start) | |
632a8dd6 | 339 | { |
89700111 | 340 | int next = -1; |
632a8dd6 | 341 | |
89700111 GM |
342 | /* Set the terminal window if not yet done. */ |
343 | if (!terminal_window_p) | |
344 | { | |
385ed61f | 345 | set_terminal_window (frame, window_size + unchanged_at_top); |
89700111 GM |
346 | terminal_window_p = 1; |
347 | } | |
632a8dd6 | 348 | |
89700111 | 349 | do |
632a8dd6 | 350 | { |
89700111 GM |
351 | --queue; |
352 | ||
353 | /* Do the deletion on the terminal. */ | |
385ed61f | 354 | ins_del_lines (frame, queue->pos, queue->count); |
89700111 GM |
355 | |
356 | /* All lines in the range deleted become empty in the glyph | |
357 | matrix. Assign to them glyph rows that are not retained. | |
358 | K is the starting position of the deleted range relative | |
359 | to the window we are working in. */ | |
360 | k = queue->pos - unchanged_at_top; | |
361 | for (j = 0; j < queue->count; ++j) | |
362 | { | |
363 | /* Find the next row not retained. */ | |
364 | while (retained_p[++next]) | |
365 | ; | |
366 | ||
367 | /* Record that this row is to be used for the empty | |
368 | glyph row j. */ | |
369 | copy_from[k + j] = next; | |
370 | } | |
632a8dd6 | 371 | } |
89700111 | 372 | while (queue > queue_start); |
177c0ea7 | 373 | |
632a8dd6 JB |
374 | } |
375 | ||
89700111 GM |
376 | for (k = 0; k < window_size; ++k) |
377 | xassert (copy_from[k] >= 0 && copy_from[k] < window_size); | |
378 | ||
379 | /* Perform the row swizzling. */ | |
380 | mirrored_line_dance (current_matrix, unchanged_at_top, window_size, | |
381 | copy_from, retained_p); | |
382 | ||
383 | /* Some sanity checks if GLYPH_DEBUG != 0. */ | |
384 | CHECK_MATRIX (current_matrix); | |
177c0ea7 | 385 | |
89700111 | 386 | if (terminal_window_p) |
385ed61f | 387 | set_terminal_window (frame, 0); |
632a8dd6 | 388 | } |
89700111 | 389 | |
632a8dd6 | 390 | \f |
1af1b1e8 RS |
391 | /* Determine, in matrix[i,j], the cost of updating the first j |
392 | old lines into the first i new lines using the direct | |
393 | scrolling method. When the old line and the new line have | |
394 | different hash codes, the calculated cost of updating old | |
395 | line j into new line i includes the cost of outputting new | |
396 | line i, and if i != j, the cost of outputting the old line j | |
397 | is also included, as a penalty for moving the line and then | |
398 | erasing it. In addition, the cost of updating a sequence of | |
399 | lines with constant i - j includes the cost of scrolling the | |
400 | old lines into their new positions, unless i == j. Scrolling | |
401 | is achieved by setting the screen window to avoid affecting | |
402 | other lines below, and inserting or deleting lines at the top | |
403 | of the scrolled region. The cost of scrolling a sequence of | |
404 | lines includes the fixed cost of specifying a scroll region, | |
405 | plus a variable cost which can depend upon the number of lines | |
406 | involved and the distance by which they are scrolled, and an | |
407 | extra cost to discourage long scrolls. | |
408 | ||
409 | As reflected in the matrix, an insert or delete does not | |
410 | correspond directly to the insertion or deletion which is | |
411 | used in scrolling lines. An insert means that the value of i | |
412 | has increased without a corresponding increase in the value | |
413 | of j. A delete means that the value of j has increased | |
414 | without a corresponding increase in the value of i. A write | |
415 | means that i and j are both increased by the same amount, and | |
416 | that the old lines will be moved to their new positions. | |
417 | ||
418 | An insert following a delete is allowed only if i > j. | |
419 | A delete following an insert is allowed only if i < j. | |
420 | These restrictions ensure that the new lines in an insert | |
421 | will always be blank as an effect of the neighboring writes. | |
422 | Thus the calculated cost of an insert is simply the cost of | |
423 | outputting the new line contents. The direct cost of a | |
424 | delete is zero. Inserts and deletes indirectly affect the | |
425 | total cost through their influence on subsequent writes. */ | |
426 | ||
427 | /* The vectors draw_cost, old_hash, and new_hash have the same | |
428 | meanings here as in calculate_scrolling, and old_draw_cost | |
429 | is the equivalent of draw_cost for the old line contents */ | |
430 | ||
431 | static void | |
432 | calculate_direct_scrolling (frame, matrix, window_size, lines_below, | |
433 | draw_cost, old_draw_cost, old_hash, new_hash, | |
434 | free_at_end) | |
435 | FRAME_PTR frame; | |
436 | /* matrix is of size window_size + 1 on each side. */ | |
437 | struct matrix_elt *matrix; | |
250368af | 438 | int window_size, lines_below; |
1af1b1e8 RS |
439 | int *draw_cost; |
440 | int *old_draw_cost; | |
441 | int *old_hash; | |
442 | int *new_hash; | |
443 | int free_at_end; | |
444 | { | |
445 | register int i, j; | |
9882535b | 446 | int frame_lines = FRAME_LINES (frame); |
1af1b1e8 RS |
447 | register struct matrix_elt *p, *p1; |
448 | register int cost, cost1, delta; | |
449 | ||
450 | /* first_insert_cost[-I] is the cost of doing the first insert-line | |
451 | at a position I lines above the bottom line in the scroll window. */ | |
452 | int *first_insert_cost | |
9882535b | 453 | = &FRAME_INSERT_COST (frame)[frame_lines - 1]; |
1af1b1e8 | 454 | int *first_delete_cost |
9882535b | 455 | = &FRAME_DELETE_COST (frame)[frame_lines - 1]; |
1af1b1e8 | 456 | int *next_insert_cost |
9882535b | 457 | = &FRAME_INSERTN_COST (frame)[frame_lines - 1]; |
1af1b1e8 | 458 | int *next_delete_cost |
9882535b | 459 | = &FRAME_DELETEN_COST (frame)[frame_lines - 1]; |
1af1b1e8 RS |
460 | |
461 | int scroll_overhead; | |
462 | ||
463 | /* Discourage long scrolls on fast lines. | |
464 | Don't scroll nearly a full frame height unless it saves | |
465 | at least 1/4 second. */ | |
9882535b | 466 | int extra_cost = baud_rate / (10 * 4 * FRAME_LINES (frame)); |
1af1b1e8 RS |
467 | |
468 | if (baud_rate <= 0) | |
469 | extra_cost = 1; | |
470 | ||
471 | /* Overhead of setting the scroll window, plus the extra cost | |
472 | cost of scrolling by a distance of one. The extra cost is | |
473 | added once for consistency with the cost vectors */ | |
8a56675d | 474 | scroll_overhead |
daf01701 | 475 | = FRAME_SCROLL_REGION_COST (frame) + extra_cost; |
1af1b1e8 RS |
476 | |
477 | /* initialize the top left corner of the matrix */ | |
478 | matrix->writecost = 0; | |
479 | matrix->insertcost = INFINITY; | |
480 | matrix->deletecost = INFINITY; | |
481 | matrix->writecount = 0; | |
482 | matrix->insertcount = 0; | |
483 | matrix->deletecount = 0; | |
484 | ||
485 | /* initialize the left edge of the matrix */ | |
486 | cost = 0; | |
487 | for (i = 1; i <= window_size; i++) | |
488 | { | |
489 | p = matrix + i * (window_size + 1); | |
490 | cost += draw_cost[i]; | |
491 | p->insertcost = cost; | |
492 | p->writecost = INFINITY; | |
493 | p->deletecost = INFINITY; | |
494 | p->insertcount = i; | |
495 | p->writecount = 0; | |
496 | p->deletecount = 0; | |
497 | } | |
498 | ||
499 | /* initialize the top edge of the matrix */ | |
500 | for (j = 1; j <= window_size; j++) | |
501 | { | |
502 | matrix[j].deletecost = 0; | |
503 | matrix[j].writecost = INFINITY; | |
504 | matrix[j].insertcost = INFINITY; | |
505 | matrix[j].deletecount = j; | |
506 | matrix[j].writecount = 0; | |
507 | matrix[j].insertcount = 0; | |
508 | } | |
509 | ||
510 | /* `i' represents the vpos among new frame contents. | |
511 | `j' represents the vpos among the old frame contents. */ | |
512 | p = matrix + window_size + 2; /* matrix [1, 1] */ | |
513 | ||
514 | for (i = 1; i <= window_size; i++, p++) | |
515 | for (j = 1; j <= window_size; j++, p++) | |
516 | { | |
517 | /* p contains the address of matrix [i, j] */ | |
518 | ||
519 | /* First calculate the cost assuming we do | |
520 | not insert or delete above this line. | |
521 | That is, if we update through line i-1 | |
522 | based on old lines through j-1, | |
523 | and then just change old line j to new line i. | |
524 | ||
525 | Depending on which choice gives the lower cost, | |
526 | this usually involves either scrolling a single line | |
527 | or extending a sequence of scrolled lines, but | |
528 | when i == j, no scrolling is required. */ | |
529 | p1 = p - window_size - 2; /* matrix [i-1, j-1] */ | |
530 | cost = p1->insertcost; | |
531 | if (cost > p1->deletecost) | |
532 | cost = p1->deletecost; | |
533 | cost1 = p1->writecost; | |
534 | if (i == j) | |
535 | { | |
536 | if (cost > cost1) | |
537 | { | |
538 | cost = cost1; | |
539 | p->writecount = p1->writecount + 1; | |
540 | } | |
541 | else | |
542 | p->writecount = 1; | |
543 | if (old_hash[j] != new_hash[i]) | |
544 | { | |
545 | cost += draw_cost[i]; | |
546 | } | |
547 | } | |
548 | else | |
549 | { | |
550 | if (i > j) | |
551 | { | |
552 | delta = i - j; | |
553 | ||
554 | /* The cost added here for scrolling the first line by | |
555 | a distance N includes the overhead of setting the | |
556 | scroll window, the cost of inserting N lines at a | |
557 | position N lines above the bottom line of the window, | |
558 | and an extra cost which is proportional to N. */ | |
559 | cost += scroll_overhead + first_insert_cost[-delta] + | |
560 | (delta-1) * (next_insert_cost[-delta] + extra_cost); | |
561 | ||
562 | /* In the most general case, the insertion overhead and | |
563 | the multiply factor can grow linearly as the distance | |
564 | from the bottom of the window increases. The incremental | |
565 | cost of scrolling an additional line depends upon the | |
566 | rate of change of these two parameters. Each of these | |
567 | growth rates can be determined by a simple difference. | |
568 | To reduce the cumulative effects of rounding error, we | |
569 | vary the position at which the difference is computed. */ | |
570 | cost1 += first_insert_cost[-j] - first_insert_cost[1-j] + | |
177c0ea7 | 571 | (delta-1) * (next_insert_cost[-j] - next_insert_cost[1-j]); |
1af1b1e8 RS |
572 | } |
573 | else | |
574 | { | |
575 | delta = j - i; | |
576 | cost += scroll_overhead + first_delete_cost[-delta] + | |
577 | (delta-1) * (next_delete_cost[-delta] + extra_cost); | |
578 | cost1 += first_delete_cost[-i] - first_delete_cost[1-i] + | |
177c0ea7 | 579 | (delta-1) * ( next_delete_cost[-i] - next_delete_cost[1-i]); |
1af1b1e8 RS |
580 | } |
581 | if (cost1 < cost) | |
582 | { | |
583 | cost = cost1; | |
584 | p->writecount = p1->writecount + 1; | |
585 | } | |
586 | else | |
587 | p->writecount = 1; | |
588 | if (old_hash[j] != new_hash[i]) | |
589 | { | |
590 | cost += draw_cost[i] + old_draw_cost[j]; | |
591 | } | |
592 | } | |
593 | p->writecost = cost; | |
594 | ||
595 | /* Calculate the cost if we do an insert-line | |
596 | before outputting this line. | |
597 | That is, we update through line i-1 | |
598 | based on old lines through j, | |
599 | do an insert-line on line i, | |
600 | and then output line i from scratch, | |
601 | leaving old lines starting from j for reuse below. */ | |
602 | p1 = p - window_size - 1; /* matrix [i-1, j] */ | |
603 | cost = p1->writecost; | |
604 | /* If i > j, an insert is allowed after a delete. */ | |
605 | if (i > j && p1->deletecost < cost) | |
606 | cost = p1->deletecost; | |
607 | if (p1->insertcost <= cost) | |
608 | { | |
609 | cost = p1->insertcost; | |
610 | p->insertcount = p1->insertcount + 1; | |
611 | } | |
612 | else | |
613 | p->insertcount = 1; | |
614 | cost += draw_cost[i]; | |
615 | p->insertcost = cost; | |
616 | ||
617 | /* Calculate the cost if we do a delete line after | |
618 | outputting this line. | |
619 | That is, we update through line i | |
620 | based on old lines through j-1, | |
621 | and throw away old line j. */ | |
622 | p1 = p - 1; /* matrix [i, j-1] */ | |
623 | cost = p1->writecost; | |
624 | /* If i < j, a delete is allowed after an insert. */ | |
625 | if (i < j && p1->insertcost < cost) | |
626 | cost = p1->insertcost; | |
627 | cost1 = p1->deletecost; | |
628 | if (p1->deletecost <= cost) | |
629 | { | |
630 | cost = p1->deletecost; | |
631 | p->deletecount = p1->deletecount + 1; | |
632 | } | |
633 | else | |
634 | p->deletecount = 1; | |
635 | p->deletecost = cost; | |
636 | } | |
637 | } | |
89700111 GM |
638 | |
639 | ||
1af1b1e8 | 640 | \f |
89700111 GM |
641 | /* Perform insert-lines and delete-lines operations on CURRENT_MATRIX |
642 | according to the costs in MATRIX, using the direct scrolling method | |
643 | which is used when the terminal supports setting a scroll window | |
644 | (scroll_region_ok). | |
1af1b1e8 RS |
645 | |
646 | WINDOW_SIZE is the number of lines being considered for scrolling | |
89700111 GM |
647 | and UNCHANGED_AT_TOP is the vpos of the first line being |
648 | considered. These two arguments can specify any contiguous range | |
649 | of lines. | |
177c0ea7 | 650 | |
1af1b1e8 RS |
651 | In the direct scrolling method, a new scroll window is selected |
652 | before each insertion or deletion, so that groups of lines can be | |
653 | scrolled directly to their final vertical positions. This method | |
89700111 GM |
654 | is described in more detail in calculate_direct_scrolling, where |
655 | the cost matrix for this approach is constructed. */ | |
1af1b1e8 RS |
656 | |
657 | static void | |
385ed61f KL |
658 | do_direct_scrolling (frame, current_matrix, cost_matrix, |
659 | window_size, unchanged_at_top) | |
660 | struct frame *frame; | |
89700111 GM |
661 | struct glyph_matrix *current_matrix; |
662 | struct matrix_elt *cost_matrix; | |
1af1b1e8 RS |
663 | int window_size; |
664 | int unchanged_at_top; | |
665 | { | |
89700111 GM |
666 | struct matrix_elt *p; |
667 | int i, j; | |
1af1b1e8 | 668 | |
89700111 GM |
669 | /* A queue of deletions and insertions to be performed. */ |
670 | struct alt_queue { int count, pos, window; }; | |
671 | struct alt_queue *queue_start = (struct alt_queue *) | |
672 | alloca (window_size * sizeof *queue_start); | |
673 | struct alt_queue *queue = queue_start; | |
1af1b1e8 | 674 | |
89700111 GM |
675 | /* Set to 1 if a terminal window has been set with |
676 | set_terminal_window: */ | |
677 | int terminal_window_p = 0; | |
1af1b1e8 | 678 | |
89700111 GM |
679 | /* A nonzero value of write_follows indicates that a write has been |
680 | selected, allowing either an insert or a delete to be selected | |
681 | next. When write_follows is zero, a delete cannot be selected | |
682 | unless j < i, and an insert cannot be selected unless i < j. | |
683 | This corresponds to a similar restriction (with the ordering | |
684 | reversed) in calculate_direct_scrolling, which is intended to | |
685 | ensure that lines marked as inserted will be blank. */ | |
686 | int write_follows_p = 1; | |
687 | ||
688 | /* For each row in the new matrix what row of the old matrix it is. */ | |
689 | int *copy_from = (int *) alloca (window_size * sizeof (int)); | |
690 | ||
691 | /* Non-zero for each row in the new matrix that is retained from the | |
692 | old matrix. Lines not retained are empty. */ | |
693 | char *retained_p = (char *) alloca (window_size * sizeof (char)); | |
694 | ||
695 | bzero (retained_p, window_size * sizeof (char)); | |
696 | ||
697 | /* Perform some sanity checks when GLYPH_DEBUG is on. */ | |
698 | CHECK_MATRIX (current_matrix); | |
699 | ||
700 | /* We are working on the line range UNCHANGED_AT_TOP ... | |
701 | UNCHANGED_AT_TOP + WINDOW_SIZE (not including) in CURRENT_MATRIX. | |
702 | We step through lines in this range from the end to the start. I | |
703 | is an index into new lines, j an index into old lines. The cost | |
704 | matrix determines what to do for ranges of indices. | |
705 | ||
706 | If i is decremented without also decrementing j, this corresponds | |
707 | to inserting empty lines in the result. If j is decremented | |
708 | without also decrementing i, this corresponds to omitting these | |
709 | lines in the new rows, i.e. rows are deleted. */ | |
710 | i = j = window_size; | |
177c0ea7 | 711 | |
1af1b1e8 RS |
712 | while (i > 0 || j > 0) |
713 | { | |
89700111 | 714 | p = cost_matrix + i * (window_size + 1) + j; |
177c0ea7 | 715 | |
89700111 GM |
716 | if (p->insertcost < p->writecost |
717 | && p->insertcost < p->deletecost | |
718 | && (write_follows_p || i < j)) | |
1af1b1e8 | 719 | { |
89700111 GM |
720 | /* Insert is cheaper than deleting or writing lines. Leave |
721 | a hole in the result display that will be filled with | |
722 | empty lines when the queue is emptied. */ | |
723 | queue->count = 0; | |
724 | queue->window = i; | |
725 | queue->pos = i - p->insertcount; | |
726 | ++queue; | |
177c0ea7 | 727 | |
1af1b1e8 | 728 | i -= p->insertcount; |
89700111 | 729 | write_follows_p = 0; |
1af1b1e8 | 730 | } |
89700111 GM |
731 | else if (p->deletecost < p->writecost |
732 | && (write_follows_p || i > j)) | |
1af1b1e8 | 733 | { |
89700111 GM |
734 | /* Deleting lines is cheaper. By decrementing J, omit |
735 | deletecount lines from the original. */ | |
736 | write_follows_p = 0; | |
1af1b1e8 RS |
737 | j -= p->deletecount; |
738 | } | |
739 | else | |
740 | { | |
89700111 GM |
741 | /* One or more lines should be written. In the direct |
742 | scrolling method we do this by scrolling the lines to the | |
743 | place they belong. */ | |
744 | int n_to_write = p->writecount; | |
745 | write_follows_p = 1; | |
177c0ea7 | 746 | xassert (n_to_write > 0); |
89700111 | 747 | |
1af1b1e8 RS |
748 | if (i > j) |
749 | { | |
89700111 | 750 | /* Immediately insert lines */ |
385ed61f | 751 | set_terminal_window (frame, i + unchanged_at_top); |
89700111 | 752 | terminal_window_p = 1; |
385ed61f | 753 | ins_del_lines (frame, j - n_to_write + unchanged_at_top, i - j); |
1af1b1e8 RS |
754 | } |
755 | else if (i < j) | |
756 | { | |
89700111 GM |
757 | /* Queue the deletion of a group of lines */ |
758 | queue->pos = i - n_to_write + unchanged_at_top; | |
759 | queue->window = j + unchanged_at_top; | |
760 | queue->count = i - j; | |
761 | ++queue; | |
1af1b1e8 RS |
762 | } |
763 | ||
89700111 | 764 | while (n_to_write > 0) |
1af1b1e8 | 765 | { |
89700111 GM |
766 | --i, --j, --n_to_write; |
767 | copy_from[i] = j; | |
768 | retained_p[j] = 1; | |
1af1b1e8 RS |
769 | } |
770 | } | |
771 | } | |
772 | ||
89700111 GM |
773 | /* Do queued operations. */ |
774 | if (queue > queue_start) | |
1af1b1e8 | 775 | { |
89700111 GM |
776 | int next = -1; |
777 | ||
778 | do | |
1af1b1e8 | 779 | { |
89700111 GM |
780 | --queue; |
781 | if (queue->count) | |
782 | { | |
385ed61f | 783 | set_terminal_window (frame, queue->window); |
89700111 | 784 | terminal_window_p = 1; |
385ed61f | 785 | ins_del_lines (frame, queue->pos, queue->count); |
89700111 GM |
786 | } |
787 | else | |
1af1b1e8 | 788 | { |
89700111 GM |
789 | for (j = queue->window - 1; j >= queue->pos; --j) |
790 | { | |
791 | while (retained_p[++next]) | |
792 | ; | |
793 | copy_from[j] = next; | |
794 | } | |
1af1b1e8 RS |
795 | } |
796 | } | |
89700111 | 797 | while (queue > queue_start); |
1af1b1e8 RS |
798 | } |
799 | ||
89700111 GM |
800 | /* Now, for each row I in the range of rows we are working on, |
801 | copy_from[i] gives the original line to copy to I, and | |
802 | retained_p[copy_from[i]] is zero if line I in the new display is | |
803 | empty. */ | |
804 | mirrored_line_dance (current_matrix, unchanged_at_top, window_size, | |
805 | copy_from, retained_p); | |
806 | ||
807 | if (terminal_window_p) | |
385ed61f | 808 | set_terminal_window (frame, 0); |
1af1b1e8 | 809 | } |
89700111 GM |
810 | |
811 | ||
1af1b1e8 | 812 | \f |
632a8dd6 | 813 | void |
0137dbf7 | 814 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
1af1b1e8 | 815 | draw_cost, old_draw_cost, old_hash, new_hash, free_at_end) |
0137dbf7 | 816 | FRAME_PTR frame; |
632a8dd6 JB |
817 | int window_size, unchanged_at_top, unchanged_at_bottom; |
818 | int *draw_cost; | |
1af1b1e8 | 819 | int *old_draw_cost; |
632a8dd6 JB |
820 | int *old_hash; |
821 | int *new_hash; | |
822 | int free_at_end; | |
823 | { | |
824 | struct matrix_elt *matrix; | |
825 | matrix = ((struct matrix_elt *) | |
826 | alloca ((window_size + 1) * (window_size + 1) * sizeof *matrix)); | |
827 | ||
daf01701 | 828 | if (FRAME_SCROLL_REGION_OK (frame)) |
1af1b1e8 RS |
829 | { |
830 | calculate_direct_scrolling (frame, matrix, window_size, | |
831 | unchanged_at_bottom, | |
177c0ea7 | 832 | draw_cost, old_draw_cost, |
1af1b1e8 | 833 | old_hash, new_hash, free_at_end); |
385ed61f | 834 | do_direct_scrolling (frame, frame->current_matrix, |
89700111 | 835 | matrix, window_size, unchanged_at_top); |
1af1b1e8 RS |
836 | } |
837 | else | |
838 | { | |
839 | calculate_scrolling (frame, matrix, window_size, unchanged_at_bottom, | |
840 | draw_cost, old_hash, new_hash, | |
841 | free_at_end); | |
385ed61f KL |
842 | do_scrolling (frame, |
843 | frame->current_matrix, matrix, window_size, | |
89700111 | 844 | unchanged_at_top); |
1af1b1e8 | 845 | } |
632a8dd6 | 846 | } |
89700111 GM |
847 | |
848 | ||
632a8dd6 | 849 | \f |
89700111 GM |
850 | /* Return number of lines in common between current and desired frame |
851 | contents described to us only as vectors of hash codes OLDHASH and | |
852 | NEWHASH. Consider only vpos range START to END (not including | |
853 | END). Ignore short lines on the assumption that avoiding redrawing | |
854 | such a line will have little weight. */ | |
632a8dd6 JB |
855 | |
856 | int | |
857 | scrolling_max_lines_saved (start, end, oldhash, newhash, cost) | |
858 | int start, end; | |
859 | int *oldhash, *newhash, *cost; | |
860 | { | |
861 | struct { int hash; int count; } lines[01000]; | |
862 | register int i, h; | |
863 | register int matchcount = 0; | |
864 | int avg_length = 0; | |
865 | int threshold; | |
866 | ||
867 | /* Compute a threshold which is 1/4 of average length of these lines. */ | |
868 | ||
869 | for (i = start; i < end; i++) | |
870 | avg_length += cost[i]; | |
871 | ||
872 | avg_length /= end - start; | |
873 | threshold = avg_length / 4; | |
874 | ||
875 | bzero (lines, sizeof lines); | |
876 | ||
89700111 GM |
877 | /* Put new lines' hash codes in hash table. Ignore lines shorter |
878 | than the threshold. Thus, if the lines that are in common are | |
879 | mainly the ones that are short, they won't count. */ | |
632a8dd6 JB |
880 | for (i = start; i < end; i++) |
881 | { | |
882 | if (cost[i] > threshold) | |
883 | { | |
884 | h = newhash[i] & 0777; | |
885 | lines[h].hash = newhash[i]; | |
886 | lines[h].count++; | |
887 | } | |
888 | } | |
889 | ||
89700111 GM |
890 | /* Look up old line hash codes in the hash table. Count number of |
891 | matches between old lines and new. */ | |
632a8dd6 JB |
892 | for (i = start; i < end; i++) |
893 | { | |
894 | h = oldhash[i] & 0777; | |
895 | if (oldhash[i] == lines[h].hash) | |
896 | { | |
897 | matchcount++; | |
898 | if (--lines[h].count == 0) | |
899 | lines[h].hash = 0; | |
900 | } | |
901 | } | |
902 | ||
903 | return matchcount; | |
904 | } | |
905 | \f | |
89700111 GM |
906 | /* Return a measure of the cost of moving the lines starting with vpos |
907 | FROM, up to but not including vpos TO, down by AMOUNT lines (AMOUNT | |
908 | may be negative). These are the same arguments that might be given | |
909 | to scroll_frame_lines to perform this scrolling. */ | |
632a8dd6 | 910 | |
dfcf069d | 911 | int |
0137dbf7 JB |
912 | scroll_cost (frame, from, to, amount) |
913 | FRAME_PTR frame; | |
632a8dd6 JB |
914 | int from, to, amount; |
915 | { | |
0137dbf7 | 916 | /* Compute how many lines, at bottom of frame, |
632a8dd6 JB |
917 | will not be involved in actual motion. */ |
918 | int limit = to; | |
919 | int offset; | |
9882535b | 920 | int height = FRAME_LINES (frame); |
632a8dd6 | 921 | |
632a8dd6 JB |
922 | if (amount == 0) |
923 | return 0; | |
924 | ||
daf01701 | 925 | if (! FRAME_SCROLL_REGION_OK (frame)) |
3e2bea7c JB |
926 | limit = height; |
927 | else if (amount > 0) | |
928 | limit += amount; | |
929 | ||
632a8dd6 JB |
930 | if (amount < 0) |
931 | { | |
932 | int temp = to; | |
933 | to = from + amount; | |
934 | from = temp + amount; | |
935 | amount = - amount; | |
936 | } | |
937 | ||
938 | offset = height - limit; | |
939 | ||
940 | return | |
0137dbf7 JB |
941 | (FRAME_INSERT_COST (frame)[offset + from] |
942 | + (amount - 1) * FRAME_INSERTN_COST (frame)[offset + from] | |
00eb4c4a RS |
943 | + FRAME_DELETE_COST (frame)[offset + to] |
944 | + (amount - 1) * FRAME_DELETEN_COST (frame)[offset + to]); | |
632a8dd6 JB |
945 | } |
946 | \f | |
947 | /* Calculate the line insertion/deletion | |
948 | overhead and multiply factor values */ | |
949 | ||
950 | static void | |
0137dbf7 JB |
951 | line_ins_del (frame, ov1, pf1, ovn, pfn, ov, mf) |
952 | FRAME_PTR frame; | |
632a8dd6 JB |
953 | int ov1, ovn; |
954 | int pf1, pfn; | |
955 | register int *ov, *mf; | |
956 | { | |
957 | register int i; | |
9882535b | 958 | register int frame_lines = FRAME_LINES (frame); |
632a8dd6 JB |
959 | register int insert_overhead = ov1 * 10; |
960 | register int next_insert_cost = ovn * 10; | |
961 | ||
9882535b | 962 | for (i = frame_lines-1; i >= 0; i--) |
632a8dd6 | 963 | { |
326e0cf8 | 964 | mf[i] = next_insert_cost / 10; |
632a8dd6 | 965 | next_insert_cost += pfn; |
326e0cf8 | 966 | ov[i] = (insert_overhead + next_insert_cost) / 10; |
632a8dd6 JB |
967 | insert_overhead += pf1; |
968 | } | |
969 | } | |
970 | ||
971 | static void | |
0137dbf7 | 972 | ins_del_costs (frame, |
632a8dd6 JB |
973 | one_line_string, multi_string, |
974 | setup_string, cleanup_string, | |
975 | costvec, ncostvec, coefficient) | |
0137dbf7 | 976 | FRAME_PTR frame; |
632a8dd6 JB |
977 | char *one_line_string, *multi_string; |
978 | char *setup_string, *cleanup_string; | |
979 | int *costvec, *ncostvec; | |
980 | int coefficient; | |
981 | { | |
982 | if (multi_string) | |
0137dbf7 | 983 | line_ins_del (frame, |
632a8dd6 JB |
984 | string_cost (multi_string) * coefficient, |
985 | per_line_cost (multi_string) * coefficient, | |
986 | 0, 0, costvec, ncostvec); | |
987 | else if (one_line_string) | |
0137dbf7 | 988 | line_ins_del (frame, |
632a8dd6 JB |
989 | string_cost (setup_string) + string_cost (cleanup_string), 0, |
990 | string_cost (one_line_string), | |
991 | per_line_cost (one_line_string), | |
992 | costvec, ncostvec); | |
993 | else | |
0137dbf7 | 994 | line_ins_del (frame, |
632a8dd6 JB |
995 | 9999, 0, 9999, 0, |
996 | costvec, ncostvec); | |
997 | } | |
998 | ||
999 | /* Calculate the insert and delete line costs. | |
1000 | Note that this is done even when running with a window system | |
1001 | because we want to know how long scrolling takes (and avoid it). | |
0137dbf7 | 1002 | This must be redone whenever the frame height changes. |
632a8dd6 JB |
1003 | |
1004 | We keep the ID costs in a precomputed array based on the position | |
1005 | at which the I or D is performed. Also, there are two kinds of ID | |
1006 | costs: the "once-only" and the "repeated". This is to handle both | |
1007 | those terminals that are able to insert N lines at a time (once- | |
1008 | only) and those that must repeatedly insert one line. | |
1009 | ||
1010 | The cost to insert N lines at line L is | |
9882535b KS |
1011 | [tt.t_ILov + (frame_lines + 1 - L) * tt.t_ILpf] + |
1012 | N * [tt.t_ILnov + (frame_lines + 1 - L) * tt.t_ILnpf] | |
632a8dd6 JB |
1013 | |
1014 | ILov represents the basic insert line overhead. ILpf is the padding | |
1015 | required to allow the terminal time to move a line: insertion at line | |
9882535b | 1016 | L changes (frame_lines + 1 - L) lines. |
632a8dd6 JB |
1017 | |
1018 | The first bracketed expression above is the overhead; the second is | |
1019 | the multiply factor. Both are dependent only on the position at | |
1020 | which the insert is performed. We store the overhead in | |
0137dbf7 JB |
1021 | FRAME_INSERT_COST (frame) and the multiply factor in |
1022 | FRAME_INSERTN_COST (frame). Note however that any insertion | |
632a8dd6 | 1023 | must include at least one multiply factor. Rather than compute this |
0137dbf7 JB |
1024 | as FRAME_INSERT_COST (frame)[line]+FRAME_INSERTN_COST (frame)[line], |
1025 | we add FRAME_INSERTN_COST (frame) into FRAME_INSERT_COST (frame). | |
632a8dd6 JB |
1026 | This is reasonable because of the particular algorithm used in calcM. |
1027 | ||
1028 | Deletion is essentially the same as insertion. | |
1029 | */ | |
1030 | ||
dfcf069d | 1031 | void |
0137dbf7 | 1032 | do_line_insertion_deletion_costs (frame, |
632a8dd6 JB |
1033 | ins_line_string, multi_ins_string, |
1034 | del_line_string, multi_del_string, | |
1035 | setup_string, cleanup_string, coefficient) | |
0137dbf7 | 1036 | FRAME_PTR frame; |
632a8dd6 JB |
1037 | char *ins_line_string, *multi_ins_string; |
1038 | char *del_line_string, *multi_del_string; | |
1039 | char *setup_string, *cleanup_string; | |
1040 | int coefficient; | |
1041 | { | |
0137dbf7 | 1042 | if (FRAME_INSERT_COST (frame) != 0) |
632a8dd6 | 1043 | { |
0137dbf7 JB |
1044 | FRAME_INSERT_COST (frame) = |
1045 | (int *) xrealloc (FRAME_INSERT_COST (frame), | |
9882535b | 1046 | FRAME_LINES (frame) * sizeof (int)); |
0137dbf7 JB |
1047 | FRAME_DELETEN_COST (frame) = |
1048 | (int *) xrealloc (FRAME_DELETEN_COST (frame), | |
9882535b | 1049 | FRAME_LINES (frame) * sizeof (int)); |
0137dbf7 JB |
1050 | FRAME_INSERTN_COST (frame) = |
1051 | (int *) xrealloc (FRAME_INSERTN_COST (frame), | |
9882535b | 1052 | FRAME_LINES (frame) * sizeof (int)); |
0137dbf7 JB |
1053 | FRAME_DELETE_COST (frame) = |
1054 | (int *) xrealloc (FRAME_DELETE_COST (frame), | |
9882535b | 1055 | FRAME_LINES (frame) * sizeof (int)); |
632a8dd6 JB |
1056 | } |
1057 | else | |
1058 | { | |
0137dbf7 | 1059 | FRAME_INSERT_COST (frame) = |
9882535b | 1060 | (int *) xmalloc (FRAME_LINES (frame) * sizeof (int)); |
0137dbf7 | 1061 | FRAME_DELETEN_COST (frame) = |
9882535b | 1062 | (int *) xmalloc (FRAME_LINES (frame) * sizeof (int)); |
0137dbf7 | 1063 | FRAME_INSERTN_COST (frame) = |
9882535b | 1064 | (int *) xmalloc (FRAME_LINES (frame) * sizeof (int)); |
177c0ea7 | 1065 | FRAME_DELETE_COST (frame) = |
9882535b | 1066 | (int *) xmalloc (FRAME_LINES (frame) * sizeof (int)); |
632a8dd6 JB |
1067 | } |
1068 | ||
0137dbf7 | 1069 | ins_del_costs (frame, |
632a8dd6 JB |
1070 | ins_line_string, multi_ins_string, |
1071 | setup_string, cleanup_string, | |
0137dbf7 | 1072 | FRAME_INSERT_COST (frame), FRAME_INSERTN_COST (frame), |
632a8dd6 | 1073 | coefficient); |
0137dbf7 | 1074 | ins_del_costs (frame, |
632a8dd6 JB |
1075 | del_line_string, multi_del_string, |
1076 | setup_string, cleanup_string, | |
fd374ddc | 1077 | FRAME_DELETE_COST (frame), FRAME_DELETEN_COST (frame), |
632a8dd6 JB |
1078 | coefficient); |
1079 | } | |
ab5796a9 MB |
1080 | |
1081 | /* arch-tag: cdb7149c-48e7-4793-a948-2786c8e45485 | |
1082 | (do not change this comment) */ |