input.c (7e1b7636c894be9d1130c284089ce1ea0786ecec) input.c (b2ea244070ff84eab79e04befb7aa30c982fc84d)
1/*
2 * Copyright (C) 1984-2017 Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */
9
1/*
2 * Copyright (C) 1984-2017 Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */
9
10
11/*
12 * High level routines dealing with getting lines of input
13 * from the file being viewed.
14 *
15 * When we speak of "lines" here, we mean PRINTABLE lines;
16 * lines processed with respect to the screen width.
17 * We use the term "raw line" to refer to lines simply
18 * delimited by newlines; not processed with respect to screen width.

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45forw_line(curr_pos)
46 POSITION curr_pos;
47{
48 POSITION base_pos;
49 POSITION new_pos;
50 int c;
51 int blankline;
52 int endline;
10/*
11 * High level routines dealing with getting lines of input
12 * from the file being viewed.
13 *
14 * When we speak of "lines" here, we mean PRINTABLE lines;
15 * lines processed with respect to the screen width.
16 * We use the term "raw line" to refer to lines simply
17 * delimited by newlines; not processed with respect to screen width.

--- 26 unchanged lines hidden (view full) ---

44forw_line(curr_pos)
45 POSITION curr_pos;
46{
47 POSITION base_pos;
48 POSITION new_pos;
49 int c;
50 int blankline;
51 int endline;
52 int chopped;
53 int backchars;
54
55get_forw_line:
56 if (curr_pos == NULL_POSITION)
57 {
58 null_line();
59 return (NULL_POSITION);
60 }

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138 null_line();
139 return (NULL_POSITION);
140 }
141 blankline = (c == '\n' || c == '\r');
142
143 /*
144 * Read each character in the line and append to the line buffer.
145 */
53 int backchars;
54
55get_forw_line:
56 if (curr_pos == NULL_POSITION)
57 {
58 null_line();
59 return (NULL_POSITION);
60 }

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138 null_line();
139 return (NULL_POSITION);
140 }
141 blankline = (c == '\n' || c == '\r');
142
143 /*
144 * Read each character in the line and append to the line buffer.
145 */
146 chopped = FALSE;
146 for (;;)
147 {
148 if (ABORT_SIGS())
149 {
150 null_line();
151 return (NULL_POSITION);
152 }
153 if (c == '\n' || c == EOI)

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188 null_line();
189 return (NULL_POSITION);
190 }
191 c = ch_forw_get();
192 } while (c != '\n' && c != EOI);
193 new_pos = ch_tell();
194 endline = TRUE;
195 quit_if_one_screen = FALSE;
147 for (;;)
148 {
149 if (ABORT_SIGS())
150 {
151 null_line();
152 return (NULL_POSITION);
153 }
154 if (c == '\n' || c == EOI)

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189 null_line();
190 return (NULL_POSITION);
191 }
192 c = ch_forw_get();
193 } while (c != '\n' && c != EOI);
194 new_pos = ch_tell();
195 endline = TRUE;
196 quit_if_one_screen = FALSE;
197 chopped = TRUE;
196 } else
197 {
198 new_pos = ch_tell() - backchars;
199 endline = FALSE;
200 }
201 break;
202 }
203 c = ch_forw_get();
204 }
205
198 } else
199 {
200 new_pos = ch_tell() - backchars;
201 endline = FALSE;
202 }
203 break;
204 }
205 c = ch_forw_get();
206 }
207
206 pdone(endline, 1);
208 pdone(endline, chopped, 1);
207
208#if HILITE_SEARCH
209 if (is_filtered(base_pos))
210 {
211 /*
212 * We don't want to display this line.
213 * Get the next line.
214 */

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250 */
251 public POSITION
252back_line(curr_pos)
253 POSITION curr_pos;
254{
255 POSITION new_pos, begin_new_pos, base_pos;
256 int c;
257 int endline;
209
210#if HILITE_SEARCH
211 if (is_filtered(base_pos))
212 {
213 /*
214 * We don't want to display this line.
215 * Get the next line.
216 */

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252 */
253 public POSITION
254back_line(curr_pos)
255 POSITION curr_pos;
256{
257 POSITION new_pos, begin_new_pos, base_pos;
258 int c;
259 int endline;
260 int chopped;
258 int backchars;
259
260get_back_line:
261 if (curr_pos == NULL_POSITION || curr_pos <= ch_zero())
262 {
263 null_line();
264 return (NULL_POSITION);
265 }

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354 return (NULL_POSITION);
355 }
356 endline = FALSE;
357 prewind();
358 plinenum(new_pos);
359 loop:
360 begin_new_pos = new_pos;
361 (void) ch_seek(new_pos);
261 int backchars;
262
263get_back_line:
264 if (curr_pos == NULL_POSITION || curr_pos <= ch_zero())
265 {
266 null_line();
267 return (NULL_POSITION);
268 }

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357 return (NULL_POSITION);
358 }
359 endline = FALSE;
360 prewind();
361 plinenum(new_pos);
362 loop:
363 begin_new_pos = new_pos;
364 (void) ch_seek(new_pos);
365 chopped = FALSE;
362
363 do
364 {
365 c = ch_forw_get();
366 if (c == EOI || ABORT_SIGS())
367 {
368 null_line();
369 return (NULL_POSITION);

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386 /*
387 * Got a full printable line, but we haven't
388 * reached our curr_pos yet. Discard the line
389 * and start a new one.
390 */
391 if (chopline || hshift > 0)
392 {
393 endline = TRUE;
366
367 do
368 {
369 c = ch_forw_get();
370 if (c == EOI || ABORT_SIGS())
371 {
372 null_line();
373 return (NULL_POSITION);

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390 /*
391 * Got a full printable line, but we haven't
392 * reached our curr_pos yet. Discard the line
393 * and start a new one.
394 */
395 if (chopline || hshift > 0)
396 {
397 endline = TRUE;
398 chopped = TRUE;
394 quit_if_one_screen = FALSE;
395 break;
396 }
397 shift:
398 pshift_all();
399 while (backchars-- > 0)
400 {
401 (void) ch_back_get();
402 new_pos--;
403 }
404 goto loop;
405 }
406 } while (new_pos < curr_pos);
407
399 quit_if_one_screen = FALSE;
400 break;
401 }
402 shift:
403 pshift_all();
404 while (backchars-- > 0)
405 {
406 (void) ch_back_get();
407 new_pos--;
408 }
409 goto loop;
410 }
411 } while (new_pos < curr_pos);
412
408 pdone(endline, 0);
413 pdone(endline, chopped, 0);
409
410#if HILITE_SEARCH
411 if (is_filtered(base_pos))
412 {
413 /*
414 * We don't want to display this line.
415 * Get the previous line.
416 */

--- 47 unchanged lines hidden --- 		414
415#if HILITE_SEARCH
416 if (is_filtered(base_pos))
417 {
418 /*
419 * We don't want to display this line.
420 * Get the previous line.
421 */

--- 47 unchanged lines hidden ---