forked from torvalds/uemacs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
random.c
1588 lines (1425 loc) · 36 KB
/
random.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* random.c
*
* This file contains the command processing functions for a number of
* random commands. There is no functional grouping here, for sure.
*
* Modified by Petri Kutvonen
*/
#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include <sys/stat.h>
#include <limits.h>
#include <stdlib.h>
#include "estruct.h"
#include "edef.h"
#include "efunc.h"
#include "line.h"
/* define PATH_MAX if not available */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
int tabsize; /* Tab size (0: use real tabs) */
/*
* Set fill column to n.
*/
int setfillcol(int f, int n)
{
fillcol = n;
mlwrite("(Fill column is %d)", n);
return TRUE;
}
/*
* Display the current position of the cursor, in origin 1 X-Y coordinates,
* the character that is under the cursor (in hex), and the fraction of the
* text that is before the cursor. The displayed column is not the current
* column, but the column that would be used on an infinite width display.
* Normally this is bound to "C-X =".
*/
int showcpos(int f, int n)
{
struct line *lp; /* current line */
long numchars; /* # of chars in file */
int numlines; /* # of lines in file */
long predchars; /* # chars preceding point */
int predlines; /* # lines preceding point */
int curchar; /* character under cursor */
int ratio;
int col;
int savepos; /* temp save for current offset */
int ecol; /* column pos/end of current line */
/* starting at the beginning of the buffer */
lp = lforw(curbp->b_linep);
/* start counting chars and lines */
numchars = 0;
numlines = 0;
predchars = 0;
predlines = 0;
curchar = 0;
while (lp != curbp->b_linep) {
/* if we are on the current line, record it */
if (lp == curwp->w_dotp) {
predlines = numlines;
predchars = numchars + curwp->w_doto;
if ((curwp->w_doto) == llength(lp))
curchar = '\n';
else
curchar = lgetc(lp, curwp->w_doto);
}
/* on to the next line */
++numlines;
numchars += llength(lp) + 1;
lp = lforw(lp);
}
/* if at end of file, record it */
if (curwp->w_dotp == curbp->b_linep) {
predlines = numlines;
predchars = numchars;
#if PKCODE
curchar = 0;
#endif
}
/* Get real column and end-of-line column. */
col = getccol(FALSE);
savepos = curwp->w_doto;
curwp->w_doto = llength(curwp->w_dotp);
ecol = getccol(FALSE);
curwp->w_doto = savepos;
ratio = 0; /* Ratio before dot. */
if (numchars != 0)
ratio = (100L * predchars) / numchars;
/* summarize and report the info */
mlwrite("Line %d/%d Col %d/%d Char %D/%D (%d%%) char = 0x%x",
predlines + 1, numlines + 1, col, ecol,
predchars, numchars, ratio, curchar);
return TRUE;
}
int getcline(void)
{ /* get the current line number */
struct line *lp; /* current line */
int numlines; /* # of lines before point */
/* starting at the beginning of the buffer */
lp = lforw(curbp->b_linep);
/* start counting lines */
numlines = 0;
while (lp != curbp->b_linep) {
/* if we are on the current line, record it */
if (lp == curwp->w_dotp)
break;
++numlines;
lp = lforw(lp);
}
/* and return the resulting count */
return numlines + 1;
}
/*
* Return current column. Stop at first non-blank given TRUE argument.
*/
int getccol(int bflg)
{
int i, col;
struct line *dlp = curwp->w_dotp;
int byte_offset = curwp->w_doto;
int len = llength(dlp);
col = i = 0;
while (i < byte_offset) {
unicode_t c;
i += utf8_to_unicode(dlp->l_text, i, len, &c);
if (c != ' ' && c != '\t' && bflg)
break;
if (c == '\t')
col |= tabmask;
else if (c < 0x20 || c == 0x7F)
++col;
else if (c >= 0xa0 && c <= 0xc0)
col += 2;
++col;
}
return col;
}
/*
* Set current column.
*
* int pos; position to set cursor
*/
int setccol(int pos)
{
int c; /* character being scanned */
int i; /* index into current line */
int col; /* current cursor column */
int llen; /* length of line in bytes */
col = 0;
llen = llength(curwp->w_dotp);
/* scan the line until we are at or past the target column */
for (i = 0; i < llen; ++i) {
/* upon reaching the target, drop out */
if (col >= pos)
break;
/* advance one character */
c = lgetc(curwp->w_dotp, i);
if (c == '\t')
col |= tabmask;
else if (c < 0x20 || c == 0x7F)
++col;
++col;
}
/* set us at the new position */
curwp->w_doto = i;
/* and tell weather we made it */
return col >= pos;
}
/*
* Twiddle the two characters on either side of dot. If dot is at the end of
* the line twiddle the two characters before it. Return with an error if dot
* is at the beginning of line; it seems to be a bit pointless to make this
* work. This fixes up a very common typo with a single stroke. Normally bound
* to "C-T". This always works within a line, so "WFEDIT" is good enough.
*/
int twiddle(int f, int n)
{
struct line *dotp;
int doto;
int cl;
int cr;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
dotp = curwp->w_dotp;
doto = curwp->w_doto;
if (doto == llength(dotp) && --doto < 0)
return FALSE;
cr = lgetc(dotp, doto);
if (--doto < 0)
return FALSE;
cl = lgetc(dotp, doto);
lputc(dotp, doto + 0, cr);
lputc(dotp, doto + 1, cl);
lchange(WFEDIT);
return TRUE;
}
/*
* Quote the next character, and insert it into the buffer. All the characters
* are taken literally, with the exception of the newline, which always has
* its line splitting meaning. The character is always read, even if it is
* inserted 0 times, for regularity. Bound to "C-Q"
*/
int quote(int f, int n)
{
int s;
int c;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
c = tgetc();
if (n < 0)
return FALSE;
if (n == 0)
return TRUE;
if (c == '\n') {
do {
s = lnewline();
} while (s == TRUE && --n);
return s;
}
return linsert(n, c);
}
/*
* Set tab size if given non-default argument (n <> 1). Otherwise, insert a
* tab into file. If given argument, n, of zero, change to true tabs.
* If n > 1, simulate tab stop every n-characters using spaces. This has to be
* done in this slightly funny way because the tab (in ASCII) has been turned
* into "C-I" (in 10 bit code) already. Bound to "C-I".
*/
int insert_tab(int f, int n)
{
if (n < 0)
return FALSE;
if (n == 0 || n > 1) {
tabsize = n;
return TRUE;
}
if (!tabsize)
return linsert(1, '\t');
return linsert(tabsize - (getccol(FALSE) % tabsize), ' ');
}
#if AEDIT
/*
* change tabs to spaces
*
* int f, n; default flag and numeric repeat count
*/
int detab(int f, int n)
{
int inc; /* increment to next line [sgn(n)] */
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (f == FALSE)
n = 1;
/* loop thru detabbing n lines */
inc = ((n > 0) ? 1 : -1);
while (n) {
curwp->w_doto = 0; /* start at the beginning */
/* detab the entire current line */
while (curwp->w_doto < llength(curwp->w_dotp)) {
/* if we have a tab */
if (lgetc(curwp->w_dotp, curwp->w_doto) == '\t') {
ldelchar(1, FALSE);
insspace(TRUE,
(tabmask + 1) -
(curwp->w_doto & tabmask));
}
forwchar(FALSE, 1);
}
/* advance/or back to the next line */
forwline(TRUE, inc);
n -= inc;
}
curwp->w_doto = 0; /* to the begining of the line */
thisflag &= ~CFCPCN; /* flag that this resets the goal column */
lchange(WFEDIT); /* yes, we have made at least an edit */
return TRUE;
}
/*
* change spaces to tabs where posible
*
* int f, n; default flag and numeric repeat count
*/
int entab(int f, int n)
{
int inc; /* increment to next line [sgn(n)] */
int fspace; /* pointer to first space if in a run */
int ccol; /* current cursor column */
char cchar; /* current character */
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (f == FALSE)
n = 1;
/* loop thru entabbing n lines */
inc = ((n > 0) ? 1 : -1);
while (n) {
curwp->w_doto = 0; /* start at the beginning */
/* entab the entire current line */
fspace = -1;
ccol = 0;
while (curwp->w_doto < llength(curwp->w_dotp)) {
/* see if it is time to compress */
if ((fspace >= 0) && (nextab(fspace) <= ccol)) {
if (ccol - fspace < 2)
fspace = -1;
else {
/* there is a bug here dealing with mixed space/tabed
lines.......it will get fixed */
backchar(TRUE, ccol - fspace);
ldelete((long) (ccol - fspace),
FALSE);
linsert(1, '\t');
fspace = -1;
}
}
/* get the current character */
cchar = lgetc(curwp->w_dotp, curwp->w_doto);
switch (cchar) {
case '\t': /* a tab...count em up */
ccol = nextab(ccol);
break;
case ' ': /* a space...compress? */
if (fspace == -1)
fspace = ccol;
ccol++;
break;
default: /* any other char...just count */
ccol++;
fspace = -1;
break;
}
forwchar(FALSE, 1);
}
/* advance/or back to the next line */
forwline(TRUE, inc);
n -= inc;
}
curwp->w_doto = 0; /* to the begining of the line */
thisflag &= ~CFCPCN; /* flag that this resets the goal column */
lchange(WFEDIT); /* yes, we have made at least an edit */
return TRUE;
}
/*
* trim trailing whitespace from the point to eol
*
* int f, n; default flag and numeric repeat count
*/
int trim(int f, int n)
{
struct line *lp; /* current line pointer */
int offset; /* original line offset position */
int length; /* current length */
int inc; /* increment to next line [sgn(n)] */
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (f == FALSE)
n = 1;
/* loop thru trimming n lines */
inc = ((n > 0) ? 1 : -1);
while (n) {
lp = curwp->w_dotp; /* find current line text */
offset = curwp->w_doto; /* save original offset */
length = lp->l_used; /* find current length */
/* trim the current line */
while (length > offset) {
if (lgetc(lp, length - 1) != ' ' &&
lgetc(lp, length - 1) != '\t')
break;
length--;
}
lp->l_used = length;
/* advance/or back to the next line */
forwline(TRUE, inc);
n -= inc;
}
lchange(WFEDIT);
thisflag &= ~CFCPCN; /* flag that this resets the goal column */
return TRUE;
}
#endif
/*
* Open up some blank space. The basic plan is to insert a bunch of newlines,
* and then back up over them. Everything is done by the subcommand
* procerssors. They even handle the looping. Normally this is bound to "C-O".
*/
int openline(int f, int n)
{
int i;
int s;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (n < 0)
return FALSE;
if (n == 0)
return TRUE;
i = n; /* Insert newlines. */
do {
s = lnewline();
} while (s == TRUE && --i);
if (s == TRUE) /* Then back up overtop */
s = backchar(f, n); /* of them all. */
return s;
}
/*
* Insert a newline. Bound to "C-M". If we are in CMODE, do automatic
* indentation as specified.
*/
int insert_newline(int f, int n)
{
int s;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (n < 0)
return FALSE;
/* if we are at list buffer, n == 1, and at some valid line containing buffer
* we switch to that buffer
*/
if (curbp == blistp && n == 1) {
if (curwp->w_dotp != lforw(blistp->b_linep) && curwp->w_dotp != lforw(lforw(blistp->b_linep))) {
/* get the buffer name in current line */
int cpos = 0;
char bufn[NBUFN];
char *tbufp;
int c0, c1, c2;
while (cpos != llength(curwp->w_dotp)) {
if (cpos == 0 || cpos+1 >= llength(curwp->w_dotp)-1) {
cpos++;
continue;
}
c0 = lgetc(curwp->w_dotp, cpos-1);
c1 = lgetc(curwp->w_dotp, cpos);
if (c0 >= '0' && c0 <= '9' && c1 == ' ')
break;
cpos++;
}
cpos++;
tbufp = bufn;
while (cpos < llength(curwp->w_dotp)) {
c2 = lgetc(curwp->w_dotp, cpos);
if (c2 == ' ')
break;
if (tbufp == &bufn[NBUFN-1])
return FALSE;
*tbufp++ = c2;
cpos++;
}
*tbufp = 0;
/* switch to that buffer */
struct buffer *bp;
if ((bp = bfind(bufn, TRUE, 0)) == NULL)
return FALSE;
if (curbp == bp)
return TRUE;
return swbuffer(bp);
}
}
#if EMACS_COMPAT && (UNIX || USG)
/* if we are in navi buffer and n == 1, and if we are at some valid line, do special things */
if (curbp == bnavip && n == 1) {
if (curwp->w_dotp != lforw(bnavip->b_linep) && curwp->w_dotp != lforw(lforw(bnavip->b_linep))) {
/* get the filepath
* if it's directory, do navigate(TRUE, 0) again;
* if it's file, do getfile(fpath, TRUE);
*/
char fpath[NFILEN];
char fpath_real[PATH_MAX]; /* some glibc's realpath require a minimum of PATH_MAX len */
struct line *lp;
struct line *nlp; /* new line allocated */
int len;
lp = lforw(bnavip->b_linep);
strncpy(fpath, lp->l_text, lp->l_used);
fpath[lp->l_used] = 0;
lp = curwp->w_dotp;
if (lp->l_text[lp->l_used-1] == '/') {
/* directory */
strcat(fpath, "/");
len = strlen(fpath);
strncpy(&fpath[len], lp->l_text, lp->l_used);
len += lp->l_used;
fpath[len] = 0;
if (realpath(fpath, fpath_real) == NULL)
return FALSE;
if (lforw(bnavip->b_linep)->l_size < strlen(fpath_real)) {
nlp = lalloc(strlen(fpath_real));
nlp->l_fp = lforw(bnavip->b_linep)->l_bp;
nlp->l_bp = bnavip->b_linep;
lfree(lforw(bnavip->b_linep));
}
lforw(bnavip->b_linep)->l_used = strlen(fpath_real); /* no appending '\0' */
strcpy(lforw(bnavip->b_linep)->l_text, fpath_real);
return navigate(TRUE, 0);
} else {
/* regular file */
strcat(fpath, "/");
len = strlen(fpath);
strncpy(&fpath[len], lp->l_text, lp->l_used);
len += lp->l_used;
fpath[len] = 0;
if (realpath(fpath, fpath_real) == NULL)
return FALSE;
return getfile(fpath_real, TRUE);
}
}
}
#endif
/* if we are in C mode and this is a default <NL> */
if (n == 1 && (curbp->b_mode & MDCMOD) &&
curwp->w_dotp != curbp->b_linep)
return cinsert();
/*
* If a newline was typed, fill column is defined, the argument is non-
* negative, wrap mode is enabled, and we are now past fill column,
* and we are not read-only, perform word wrap.
*/
if ((curwp->w_bufp->b_mode & MDWRAP) && fillcol > 0 &&
getccol(FALSE) > fillcol &&
(curwp->w_bufp->b_mode & MDVIEW) == FALSE)
execute(META | SPEC | 'W', FALSE, 1);
/* insert some lines */
while (n--) {
if ((s = lnewline()) != TRUE)
return s;
#if SCROLLCODE
curwp->w_flag |= WFINS;
#endif
}
return TRUE;
}
int cinsert(void)
{ /* insert a newline and indentation for C */
char *cptr; /* string pointer into text to copy */
int tptr; /* index to scan into line */
int bracef; /* was there a brace at the end of line? */
int i;
char ichar[NSTRING]; /* buffer to hold indent of last line */
/* grab a pointer to text to copy indentation from */
cptr = &curwp->w_dotp->l_text[0];
/* check for a brace */
tptr = curwp->w_doto - 1;
bracef = (cptr[tptr] == '{');
/* save the indent of the previous line */
i = 0;
while ((i < tptr) && (cptr[i] == ' ' || cptr[i] == '\t')
&& (i < NSTRING - 1)) {
ichar[i] = cptr[i];
++i;
}
ichar[i] = 0; /* terminate it */
/* put in the newline */
if (lnewline() == FALSE)
return FALSE;
/* and the saved indentation */
linstr(ichar);
/* and one more tab for a brace */
if (bracef)
insert_tab(FALSE, 1);
#if SCROLLCODE
curwp->w_flag |= WFINS;
#endif
return TRUE;
}
#if NBRACE
/*
* insert a brace into the text here...we are in CMODE
*
* int n; repeat count
* int c; brace to insert (always } for now)
*/
int insbrace(int n, int c)
{
int ch; /* last character before input */
int oc; /* caractere oppose a c */
int i, count;
int target; /* column brace should go after */
struct line *oldlp;
int oldoff;
/* if we aren't at the beginning of the line... */
if (curwp->w_doto != 0)
/* scan to see if all space before this is white space */
for (i = curwp->w_doto - 1; i >= 0; --i) {
ch = lgetc(curwp->w_dotp, i);
if (ch != ' ' && ch != '\t')
return linsert(n, c);
}
/* chercher le caractere oppose correspondant */
switch (c) {
case '}':
oc = '{';
break;
case ']':
oc = '[';
break;
case ')':
oc = '(';
break;
default:
return FALSE;
}
oldlp = curwp->w_dotp;
oldoff = curwp->w_doto;
count = 1;
backchar(FALSE, 1);
while (count > 0) {
if (curwp->w_doto == llength(curwp->w_dotp))
ch = '\n';
else
ch = lgetc(curwp->w_dotp, curwp->w_doto);
if (ch == c)
++count;
if (ch == oc)
--count;
backchar(FALSE, 1);
if (boundry(curwp->w_dotp, curwp->w_doto, REVERSE))
break;
}
if (count != 0) { /* no match */
curwp->w_dotp = oldlp;
curwp->w_doto = oldoff;
return linsert(n, c);
}
curwp->w_doto = 0; /* debut de ligne */
/* aller au debut de la ligne apres la tabulation */
while ((ch = lgetc(curwp->w_dotp, curwp->w_doto)) == ' '
|| ch == '\t')
forwchar(FALSE, 1);
/* delete back first */
target = getccol(FALSE); /* c'est l'indent que l'on doit avoir */
curwp->w_dotp = oldlp;
curwp->w_doto = oldoff;
while (target != getccol(FALSE)) {
if (target < getccol(FALSE)) /* on doit detruire des caracteres */
while (getccol(FALSE) > target)
backdel(FALSE, 1);
else { /* on doit en inserer */
while (target - getccol(FALSE) >= 8)
linsert(1, '\t');
linsert(target - getccol(FALSE), ' ');
}
}
/* and insert the required brace(s) */
return linsert(n, c);
}
#else
/*
* insert a brace into the text here...we are in CMODE
*
* int n; repeat count
* int c; brace to insert (always { for now)
*/
int insbrace(int n, int c)
{
int ch; /* last character before input */
int i;
int target; /* column brace should go after */
/* if we are at the beginning of the line, no go */
if (curwp->w_doto == 0)
return linsert(n, c);
/* scan to see if all space before this is white space */
for (i = curwp->w_doto - 1; i >= 0; --i) {
ch = lgetc(curwp->w_dotp, i);
if (ch != ' ' && ch != '\t')
return linsert(n, c);
}
/* delete back first */
target = getccol(FALSE); /* calc where we will delete to */
target -= 1;
target -= target % (tabsize == 0 ? 8 : tabsize);
while (getccol(FALSE) > target)
backdel(FALSE, 1);
/* and insert the required brace(s) */
return linsert(n, c);
}
#endif
int inspound(void)
{ /* insert a # into the text here...we are in CMODE */
int ch; /* last character before input */
int i;
/* if we are at the beginning of the line, no go */
if (curwp->w_doto == 0)
return linsert(1, '#');
/* scan to see if all space before this is white space */
for (i = curwp->w_doto - 1; i >= 0; --i) {
ch = lgetc(curwp->w_dotp, i);
if (ch != ' ' && ch != '\t')
return linsert(1, '#');
}
/* delete back first */
while (getccol(FALSE) >= 1)
backdel(FALSE, 1);
/* and insert the required pound */
return linsert(1, '#');
}
/*
* Delete blank lines around dot. What this command does depends if dot is
* sitting on a blank line. If dot is sitting on a blank line, this command
* deletes all the blank lines above and below the current line. If it is
* sitting on a non blank line then it deletes all of the blank lines after
* the line. Normally this command is bound to "C-X C-O". Any argument is
* ignored.
*/
int deblank(int f, int n)
{
struct line *lp1;
struct line *lp2;
long nld;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
lp1 = curwp->w_dotp;
while (llength(lp1) == 0 && (lp2 = lback(lp1)) != curbp->b_linep)
lp1 = lp2;
lp2 = lp1;
nld = 0;
while ((lp2 = lforw(lp2)) != curbp->b_linep && llength(lp2) == 0)
++nld;
if (nld == 0)
return TRUE;
curwp->w_dotp = lforw(lp1);
curwp->w_doto = 0;
return ldelete(nld, FALSE);
}
/*
* Delete trailing spaces (' ' and '\t').
* Move dot backward to a non-space position or the beginning of line.
* All trailing spaces in current buffer are deleted.
*/
int deltspaces(int f, int n)
{
int c;
int status;
int bc; /* backchar or not */
int odoto;
struct line *odotp;
int p;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
while (curwp->w_doto != 0) {
bc = TRUE;
for (p = curwp->w_doto; p <= llength(curwp->w_dotp); p ++) {
c = lgetc(curwp->w_dotp, p-1);
if (c != ' ' && c != '\t') {
bc = FALSE;
break;
}
}
if (bc) {
status = backchar(0, 1);
if (!status)
return FALSE;
} else
break;
}
odoto = curwp->w_doto;
odotp = curwp->w_dotp;
/* go to begin of buffer, delete trailing space line by line */
gotobob(0, 0);
while (TRUE) {
gotoeol(0, 0);
if (llength(curwp->w_dotp) == 0)
goto nextline;
c = lgetc(curwp->w_dotp, curwp->w_doto-1);
while (c == ' ' || c == '\t') {
backdel(FALSE, 1);
curbp->b_flag |= BFCHG;
if (curwp->w_doto == 0)
break;
else
c = lgetc(curwp->w_dotp, curwp->w_doto-1);
}
nextline:
status = forwline(0, 1);
if (!status)
break;
}
/* got back to the original saved position */
curwp->w_dotp = odotp;
curwp->w_doto = odoto;
curwp->w_flag |= WFHARD;
return TRUE;
}
/*
* Insert a newline, then enough tabs and spaces to duplicate the indentation
* of the previous line. Assumes tabs are every eight characters. Quite simple.
* Figure out the indentation of the current line. Insert a newline by calling
* the standard routine. Insert the indentation by inserting the right number
* of tabs and spaces. Return TRUE if all ok. Return FALSE if one of the
* subcomands failed. Normally bound to "C-J".
*/
int indent(int f, int n)
{
int nicol;
int c;
int i;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (n < 0)
return FALSE;
while (n--) {
nicol = 0;
for (i = 0; i < llength(curwp->w_dotp); ++i) {
c = lgetc(curwp->w_dotp, i);
if (c != ' ' && c != '\t')
break;
if (c == '\t')
nicol |= tabmask;
++nicol;
}
/* respect tabsize which may be set by handle-tab (insert_tab) function */
if (lnewline() == FALSE)
return FALSE;
if (!tabsize) {
if ((i = nicol / 8) != 0 && linsert(i, '\t') == FALSE)
return FALSE;
if ((i = nicol % 8) != 0 && linsert(i, ' ') == FALSE)
return FALSE;
} else {
i = nicol / tabsize;
while (i > 0) {
if (insert_tab(FALSE, 1) == FALSE)
return FALSE;
i--;
}
if ((i = nicol % tabsize) != 0 && linsert(i, ' ') == FALSE)
return FALSE;
}
}
return TRUE;
}
/*
* Delete forward. This is real easy, because the basic delete routine does
* all of the work. Watches for negative arguments, and does the right thing.
* If any argument is present, it kills rather than deletes, to prevent loss
* of text if typed with a big argument. Normally bound to "C-D".
*/
int forwdel(int f, int n)
{
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (n < 0)
return backdel(f, -n);
if (f != FALSE) { /* Really a kill. */
if ((lastflag & CFKILL) == 0)
kdelete();
thisflag |= CFKILL;
}
return ldelchar((long) n, f);
}
/*
* Delete backwards. This is quite easy too, because it's all done with other
* functions. Just move the cursor back, and delete forwards. Like delete
* forward, this actually does a kill if presented with an argument. Bound to
* both "RUBOUT" and "C-H".
*/
int backdel(int f, int n)
{
int s;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if (n < 0)
return forwdel(f, -n);
if (f != FALSE) { /* Really a kill. */
if ((lastflag & CFKILL) == 0)
kdelete();
thisflag |= CFKILL;
}
if ((s = backchar(f, n)) == TRUE)
s = ldelchar(n, f);
return s;
}
/*
* Kill text. If called without an argument, it kills from dot to the end of
* the line, unless it is at the end of the line, when it kills the newline.
* If called with an argument of 0, it kills from the start of the line to dot.
* If called with a positive argument, it kills from dot forward over that
* number of newlines. If called with a negative argument it kills backwards
* that number of newlines. Normally bound to "C-K".
*/
int killtext(int f, int n)
{
struct line *nextp;
long chunk;
if (curbp->b_mode & MDVIEW) /* don't allow this command if */
return rdonly(); /* we are in read only mode */
if ((lastflag & CFKILL) == 0) /* Clear kill buffer if */
kdelete(); /* last wasn't a kill. */
thisflag |= CFKILL;
if (f == FALSE) {
chunk = llength(curwp->w_dotp) - curwp->w_doto;
if (chunk == 0)
chunk = 1;
} else if (n == 0) {
chunk = curwp->w_doto;
curwp->w_doto = 0;