1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30
31 /* Copyright (c) 1981 Regents of the University of California */
32
33 #include "ex.h"
34 #include "ex_re.h"
35
36 /*
37 * Routines for address parsing and assignment and checking of address bounds
38 * in command mode. The routine address is called from ex_cmds.c
39 * to parse each component of a command (terminated by , ; or the beginning
40 * of the command itself. It is also called by the scanning routine
41 * in ex_voperate.c from within open/visual.
42 *
43 * Other routines here manipulate the externals addr1 and addr2.
44 * These are the first and last lines for the current command.
45 *
46 * The variable bigmove remembers whether a non-local glitch of . was
47 * involved in an address expression, so we can set the previous context
48 * mark '' when such a motion occurs.
49 */
50
51 static bool bigmove;
52
53 /*
54 * Set up addr1 and addr2 for commands whose default address is dot.
55 */
56 void
setdot(void)57 setdot(void)
58 {
59
60 setdot1();
61 if (bigmove)
62 markDOT();
63 }
64
65 /*
66 * Call setdot1 to set up default addresses without ever
67 * setting the previous context mark.
68 */
69 void
setdot1(void)70 setdot1(void)
71 {
72
73 if (addr2 == 0)
74 addr1 = addr2 = dot;
75 if (addr1 > addr2) {
76 notempty();
77 error(value(vi_TERSE) ?
78 gettext("Addr1 > addr2") :
79 gettext("First address exceeds second"));
80 }
81 }
82
83 /*
84 * Ex allows you to say
85 * delete 5
86 * to delete 5 lines, etc.
87 * Such nonsense is implemented by setcount.
88 */
89 void
setcount(void)90 setcount(void)
91 {
92 int cnt;
93
94 pastwh();
95 if (!isdigit(peekchar())) {
96 setdot();
97 return;
98 }
99 addr1 = addr2;
100 setdot();
101 cnt = getnum();
102 if (cnt <= 0)
103 error(value(vi_TERSE) ?
104 gettext("Bad count") :
105 gettext("Nonzero count required"));
106 addr2 += cnt - 1;
107 if (addr2 > dol)
108 addr2 = dol;
109 nonzero();
110 }
111
112 #ifdef XPG4
113 /*
114 * setcount2(): a version of setcount() which sets addr2 based on addr1 + cnt.
115 * description:
116 * this routine is responsible for setting addr1 (possibly) and addr2
117 * (always); using the [count] to compute addr2.
118 *
119 * this is similar setcount(), but it differs in that setcount() sets
120 * addr1 based upon addr2; here we set addr2 based upon addr1 and the
121 * [count].
122 *
123 * the reason for this is because some commands, of the form:
124 * [range] command [count]
125 * will use [count] to modify the range. E.g.:
126 * change, delete, join, list, yank.
127 */
128 void
setcount2(void)129 setcount2(void)
130 {
131 int cnt;
132
133 pastwh();
134 if (!isdigit(peekchar())) {
135 setdot();
136 return;
137 }
138 setdot();
139 cnt = getnum();
140 if (cnt <= 0)
141 error(value(vi_TERSE) ?
142 gettext("Bad count") :
143 gettext("Nonzero count required"));
144 addr2 = addr1 + (cnt - 1);
145 if (addr2 > dol)
146 addr2 = dol;
147 if (addr2 < zero) {
148 addr1 = addr2 = zero;
149 }
150 nonzero();
151 }
152
153 #endif /* XPG4 */
154
155 /*
156 * Parse a number out of the command input stream.
157 */
158 int
getnum(void)159 getnum(void)
160 {
161 int cnt;
162
163 /*CSTYLED*/
164 for (cnt = 0; isdigit(peekcd());)
165 cnt = cnt * 10 + getchar() - '0';
166 return (cnt);
167 }
168
169 /*
170 * Set the default addresses for commands which use the whole
171 * buffer as default, notably write.
172 */
173 void
setall(void)174 setall(void)
175 {
176
177 if (addr2 == 0) {
178 addr1 = one;
179 addr2 = dol;
180 if (dol == zero) {
181 dot = zero;
182 return;
183 }
184 }
185 /*
186 * Don't want to set previous context mark so use setdot1().
187 */
188 setdot1();
189 }
190
191 /*
192 * No address allowed on, e.g. the file command.
193 */
194 void
setnoaddr(void)195 setnoaddr(void)
196 {
197
198 if (addr2 != 0)
199 error(value(vi_TERSE) ?
200 gettext("No address allowed") :
201 gettext("No address allowed on this command"));
202 }
203
204 /*
205 * Parse an address.
206 * Just about any sequence of address characters is legal.
207 *
208 * If you are tricky you can use this routine and the = command
209 * to do simple addition and subtraction of cardinals less
210 * than the number of lines in the file.
211 */
212 line *
address(inputline)213 address(inputline)
214 unsigned char *inputline;
215 {
216 line *addr;
217 int offset, c;
218 short lastsign;
219
220 bigmove = 0;
221 lastsign = 0;
222 offset = 0;
223 addr = 0;
224 for (;;) {
225 if (isdigit(peekcd())) {
226 if (addr == 0) {
227 addr = zero;
228 bigmove = 1;
229 }
230 loc1 = 0;
231 addr += offset;
232 offset = getnum();
233 if (lastsign >= 0)
234 addr += offset;
235 else
236 addr -= offset;
237 lastsign = 0;
238 offset = 0;
239 }
240 switch (c = getcd()) {
241
242 case '?':
243 case '/':
244 case '$':
245 case '\'':
246 case '\\':
247 bigmove++;
248 /* FALLTHROUGH */
249 case '.':
250 if (addr || offset)
251 error(gettext("Badly formed address"));
252 }
253 offset += lastsign;
254 lastsign = 0;
255 switch (c) {
256
257 case ' ':
258 case '\t':
259 continue;
260 case ':':
261 while (peekchar() == ':')
262 ignchar();
263 continue;
264 case '+':
265 lastsign = 1;
266 if (addr == 0)
267 addr = dot;
268 continue;
269
270 case '^':
271 case '-':
272 lastsign = -1;
273 if (addr == 0)
274 addr = dot;
275 continue;
276
277 case '\\':
278 case '?':
279 case '/':
280 c = vi_compile(c, 1);
281 notempty();
282 savere(&scanre);
283 addr = dot;
284 if (inputline && execute(0, dot)) {
285 if (c == '/') {
286 while (loc1 <= (char *)inputline) {
287 if (loc1 == loc2)
288 loc2++;
289 if (!execute(1))
290 goto nope;
291 }
292 break;
293 } else if (loc1 < (char *)inputline) {
294 unsigned char *last;
295 doques:
296
297 do {
298 last = (unsigned char *)loc1;
299 if (loc1 == loc2)
300 loc2++;
301 if (!execute(1))
302 break;
303 } while (loc1 < (char *)inputline);
304 loc1 = (char *)last;
305 break;
306 }
307 }
308 nope:
309 for (;;) {
310 if (c == '/') {
311 addr++;
312 if (addr > dol) {
313 if (value(vi_WRAPSCAN) == 0)
314 error(value(vi_TERSE) ?
315 gettext("No match to BOTTOM") :
316 gettext("Address search hit BOTTOM without matching pattern"));
317 addr = zero;
318 }
319 } else {
320 addr--;
321 if (addr < zero) {
322 if (value(vi_WRAPSCAN) == 0)
323 error(value(vi_TERSE) ?
324 gettext("No match to TOP") :
325 gettext("Address search hit TOP without matching pattern"));
326 addr = dol;
327 }
328 }
329 if (execute(0, addr)) {
330 if (inputline && c == '?') {
331 inputline = &linebuf[LBSIZE];
332 goto doques;
333 }
334 break;
335 }
336 if (addr == dot)
337 error(value(vi_TERSE) ?
338 gettext("Fail") :
339 gettext("Pattern not found"));
340 }
341 continue;
342
343 case '$':
344 addr = dol;
345 continue;
346
347 case '.':
348 addr = dot;
349 continue;
350
351 case '\'':
352 c = markreg(getchar());
353 if (c == 0)
354 error(gettext("Marks are ' and a-z"));
355 addr = getmark(c);
356 if (addr == 0)
357 error(value(vi_TERSE) ?
358 gettext("Undefined mark") :
359 gettext("Undefined mark referenced"));
360 break;
361
362 default:
363 ungetchar(c);
364 if (offset) {
365 if (addr == 0)
366 addr = dot;
367 addr += offset;
368 loc1 = 0;
369 }
370 if (addr == 0) {
371 bigmove = 0;
372 return (0);
373 }
374 if (addr != zero)
375 notempty();
376 addr += lastsign;
377 if (addr < zero)
378 error(value(vi_TERSE) ?
379 gettext("Negative address") :
380 gettext("Negative address - "
381 "first buffer line is 1"));
382 if (addr > dol)
383 error(value(vi_TERSE) ?
384 gettext("Not that many lines") :
385 gettext("Not that many lines in buffer"));
386 return (addr);
387 }
388 }
389 }
390
391 /*
392 * Abbreviations to make code smaller
393 * Left over from squashing ex version 1.1 into
394 * 11/34's and 11/40's.
395 */
396 void
setCNL(void)397 setCNL(void)
398 {
399
400 setcount();
401 donewline();
402 }
403
404 void
setNAEOL(void)405 setNAEOL(void)
406 {
407
408 setnoaddr();
409 eol();
410 }
411