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
|
/* $OpenBSD: region.c,v 1.15 2005/04/03 02:09:28 db Exp $ */
/*
* Region based commands.
* The routines in this file deal with the region, that magic space between
* "." and mark. Some functions are commands. Some functions are just for
* internal use.
*/
#include "def.h"
static int getregion(REGION *);
static int setsize(REGION *, RSIZE);
/*
* Kill the region. Ask "getregion" to figure out the bounds of the region.
* Move "." to the start, and kill the characters.
*/
/* ARGSUSED */
int
killregion(int f, int n)
{
int s;
REGION region;
if ((s = getregion(®ion)) != TRUE)
return (s);
/* This is a kill-type command, so do magic kill buffer stuff. */
if ((lastflag & CFKILL) == 0)
kdelete();
thisflag |= CFKILL;
curwp->w_dotp = region.r_linep;
curwp->w_doto = region.r_offset;
return (ldelete(region.r_size, KFORW));
}
/*
* Copy all of the characters in the region to the kill buffer. Don't move
* dot at all. This is a bit like a kill region followed by a yank.
*/
/* ARGSUSED */
int
copyregion(int f, int n)
{
LINE *linep;
REGION region;
int loffs;
int s;
if ((s = getregion(®ion)) != TRUE)
return (s);
/* kill type command */
if ((lastflag & CFKILL) == 0)
kdelete();
thisflag |= CFKILL;
/* current line */
linep = region.r_linep;
/* current offset */
loffs = region.r_offset;
while (region.r_size--) {
if (loffs == llength(linep)) { /* End of line. */
if ((s = kinsert('\n', KFORW)) != TRUE)
return (s);
linep = lforw(linep);
loffs = 0;
} else { /* Middle of line. */
if ((s = kinsert(lgetc(linep, loffs), KFORW)) != TRUE)
return (s);
++loffs;
}
}
return (TRUE);
}
/*
* Lower case region. Zap all of the upper case characters in the region to
* lower case. Use the region code to set the limits. Scan the buffer, doing
* the changes. Call "lchange" to ensure that redisplay is done in all
* buffers.
*/
/* ARGSUSED */
int
lowerregion(int f, int n)
{
LINE *linep;
REGION region;
int loffs, c, s;
if (curbp->b_flag & BFREADONLY) {
ewprintf("Buffer is read-only");
return (FALSE);
}
if ((s = getregion(®ion)) != TRUE)
return (s);
undo_add_change(region.r_linep, region.r_offset, region.r_size);
lchange(WFHARD);
linep = region.r_linep;
loffs = region.r_offset;
while (region.r_size--) {
if (loffs == llength(linep)) {
linep = lforw(linep);
loffs = 0;
} else {
c = lgetc(linep, loffs);
if (ISUPPER(c) != FALSE)
lputc(linep, loffs, TOLOWER(c));
++loffs;
}
}
return (TRUE);
}
/*
* Upper case region. Zap all of the lower case characters in the region to
* upper case. Use the region code to set the limits. Scan the buffer,
* doing the changes. Call "lchange" to ensure that redisplay is done in all
* buffers.
*/
/* ARGSUSED */
int
upperregion(int f, int n)
{
LINE *linep;
REGION region;
int loffs, c, s;
if (curbp->b_flag & BFREADONLY) {
ewprintf("Buffer is read-only");
return (FALSE);
}
if ((s = getregion(®ion)) != TRUE)
return (s);
undo_add_change(region.r_linep, region.r_offset, region.r_size);
lchange(WFHARD);
linep = region.r_linep;
loffs = region.r_offset;
while (region.r_size--) {
if (loffs == llength(linep)) {
linep = lforw(linep);
loffs = 0;
} else {
c = lgetc(linep, loffs);
if (ISLOWER(c) != FALSE)
lputc(linep, loffs, TOUPPER(c));
++loffs;
}
}
return (TRUE);
}
/*
* This routine figures out the bound of the region in the current window,
* and stores the results into the fields of the REGION structure. Dot and
* mark are usually close together, but I don't know the order, so I scan
* outward from dot, in both directions, looking for mark. The size is kept
* in a long. At the end, after the size is figured out, it is assigned to
* the size field of the region structure. If this assignment loses any bits,
* then we print an error. This is "type independent" overflow checking. All
* of the callers of this routine should be ready to get an ABORT status,
* because I might add a "if regions is big, ask before clobbering" flag.
*/
static int
getregion(REGION *rp)
{
LINE *flp, *blp;
long fsize, bsize;
if (curwp->w_markp == NULL) {
ewprintf("No mark set in this window");
return (FALSE);
}
/* "r_size" always ok */
if (curwp->w_dotp == curwp->w_markp) {
rp->r_linep = curwp->w_dotp;
if (curwp->w_doto < curwp->w_marko) {
rp->r_offset = curwp->w_doto;
rp->r_size = (RSIZE)(curwp->w_marko - curwp->w_doto);
} else {
rp->r_offset = curwp->w_marko;
rp->r_size = (RSIZE)(curwp->w_doto - curwp->w_marko);
}
return (TRUE);
}
/* get region size */
flp = blp = curwp->w_dotp;
bsize = curwp->w_doto;
fsize = llength(flp) - curwp->w_doto + 1;
while (lforw(flp) != curbp->b_linep || lback(blp) != curbp->b_linep) {
if (lforw(flp) != curbp->b_linep) {
flp = lforw(flp);
if (flp == curwp->w_markp) {
rp->r_linep = curwp->w_dotp;
rp->r_offset = curwp->w_doto;
return (setsize(rp,
(RSIZE)(fsize + curwp->w_marko)));
}
fsize += llength(flp) + 1;
}
if (lback(blp) != curbp->b_linep) {
blp = lback(blp);
bsize += llength(blp) + 1;
if (blp == curwp->w_markp) {
rp->r_linep = blp;
rp->r_offset = curwp->w_marko;
return (setsize(rp,
(RSIZE)(bsize - curwp->w_marko)));
}
}
}
ewprintf("Bug: lost mark");
return (FALSE);
}
/*
* Set size, and check for overflow.
*/
static int
setsize(REGION *rp, RSIZE size)
{
rp->r_size = size;
if (rp->r_size != size) {
ewprintf("Region is too large");
return (FALSE);
}
return (TRUE);
}
#ifdef PREFIXREGION
/*
* Implements one of my favorite keyboard macros; put a string at the
* beginning of a number of lines in a buffer. The quote string is
* settable by using set-prefix-string. Great for quoting mail, which
* is the real reason I wrote it, but also has uses for creating bar
* comments (like the one you're reading) in C code.
*/
#define PREFIXLENGTH 40
static char prefix_string[PREFIXLENGTH] = {'>', '\0'};
/*
* Prefix the region with whatever is in prefix_string. Leaves dot at the
* beginning of the line after the end of the region. If an argument is
* given, prompts for the line prefix string.
*/
/* ARGSUSED */
int
prefixregion(int f, int n)
{
LINE *first, *last;
REGION region;
char *prefix = prefix_string;
int nline;
int s;
if (curbp->b_flag & BFREADONLY) {
ewprintf("Buffer is read-only");
return (FALSE);
}
if ((f == TRUE) && ((s = setprefix(FFRAND, 1)) != TRUE))
return (s);
/* get # of lines to affect */
if ((s = getregion(®ion)) != TRUE)
return (s);
first = region.r_linep;
last = (first == curwp->w_dotp) ? curwp->w_markp : curwp->w_dotp;
for (nline = 1; first != last; nline++)
first = lforw(first);
/* move to beginning of region */
curwp->w_dotp = region.r_linep;
curwp->w_doto = region.r_offset;
/* for each line, go to beginning and insert the prefix string */
while (nline--) {
(void)gotobol(FFRAND, 1);
for (prefix = prefix_string; *prefix; prefix++)
(void)linsert(1, *prefix);
(void)forwline(FFRAND, 1);
}
(void)gotobol(FFRAND, 1);
return (TRUE);
}
/*
* Set line prefix string.
*/
/* ARGSUSED */
int
setprefix(int f, int n)
{
char buf[PREFIXLENGTH], *rep;
int retval;
if (prefix_string[0] == '\0')
rep = ereply("Prefix string: ", buf, sizeof(buf));
else
rep = ereply("Prefix string (default %s): ",
buf, sizeof(buf), prefix_string);
if (rep != NULL && *rep != '\0') {
(void)strlcpy(prefix_string, rep, sizeof(prefix_string));
retval = TRUE;
} else if (*rep == '\0' && prefix_string[0] != '\0') {
/* CR -- use old one */
retval = TRUE;
} else
retval = FALSE;
return (retval);
}
#endif /* PREFIXREGION */
int
region_get_data(REGION *reg, char *buf, int len)
{
int i, off;
LINE *lp;
off = reg->r_offset;
lp = reg->r_linep;
for (i = 0; i < len; i++) {
if (off == llength(lp)) {
lp = lforw(lp);
if (lp == curbp->b_linep)
break;
off = 0;
buf[i] = '\n';
} else {
buf[i] = lgetc(lp, off);
off++;
}
}
buf[i] = '\0';
return (i);
}
int
region_put_data(const char *buf, int len)
{
int i;
for (i = 0; buf[i]; i++) {
if (buf[i] == '\n')
lnewline();
else
linsert(1, buf[i]);
}
return (0);
}
|