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1 | /*- |
2 | * Copyright (c) 1980 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.proprietary.c% | |
19d73a0e DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
2791ff57 KB |
9 | static char sccsid[] = "@(#)ex_addr.c 7.6 (Berkeley) %G%"; |
10 | #endif /* not lint */ | |
19d73a0e | 11 | |
f4d38626 MH |
12 | #include "ex.h" |
13 | #include "ex_re.h" | |
14 | ||
15 | /* | |
16 | * Routines for address parsing and assignment and checking of address bounds | |
17 | * in command mode. The routine address is called from ex_cmds.c | |
18 | * to parse each component of a command (terminated by , ; or the beginning | |
19 | * of the command itself. It is also called by the scanning routine | |
20 | * in ex_voperate.c from within open/visual. | |
21 | * | |
22 | * Other routines here manipulate the externals addr1 and addr2. | |
23 | * These are the first and last lines for the current command. | |
24 | * | |
25 | * The variable bigmove remembers whether a non-local glitch of . was | |
26 | * involved in an address expression, so we can set the previous context | |
27 | * mark '' when such a motion occurs. | |
28 | */ | |
29 | ||
30 | static bool bigmove; | |
31 | ||
32 | /* | |
33 | * Set up addr1 and addr2 for commands whose default address is dot. | |
34 | */ | |
35 | setdot() | |
36 | { | |
37 | ||
38 | setdot1(); | |
39 | if (bigmove) | |
40 | markDOT(); | |
41 | } | |
42 | ||
43 | /* | |
44 | * Call setdot1 to set up default addresses without ever | |
45 | * setting the previous context mark. | |
46 | */ | |
47 | setdot1() | |
48 | { | |
49 | ||
50 | if (addr2 == 0) | |
51 | addr1 = addr2 = dot; | |
52 | if (addr1 > addr2) { | |
53 | notempty(); | |
54 | error("Addr1 > addr2|First address exceeds second"); | |
55 | } | |
56 | } | |
57 | ||
58 | /* | |
59 | * Ex allows you to say | |
60 | * delete 5 | |
61 | * to delete 5 lines, etc. | |
62 | * Such nonsense is implemented by setcount. | |
63 | */ | |
64 | setcount() | |
65 | { | |
66 | register int cnt; | |
67 | ||
68 | pastwh(); | |
69 | if (!isdigit(peekchar())) { | |
70 | setdot(); | |
71 | return; | |
72 | } | |
73 | addr1 = addr2; | |
74 | setdot(); | |
75 | cnt = getnum(); | |
76 | if (cnt <= 0) | |
77 | error("Bad count|Nonzero count required"); | |
78 | addr2 += cnt - 1; | |
79 | if (addr2 > dol) | |
80 | addr2 = dol; | |
81 | nonzero(); | |
82 | } | |
83 | ||
84 | /* | |
85 | * Parse a number out of the command input stream. | |
86 | */ | |
87 | getnum() | |
88 | { | |
89 | register int cnt; | |
90 | ||
91 | for (cnt = 0; isdigit(peekcd());) | |
5a6c967e | 92 | cnt = cnt * 10 + ex_getchar() - '0'; |
f4d38626 MH |
93 | return (cnt); |
94 | } | |
95 | ||
96 | /* | |
97 | * Set the default addresses for commands which use the whole | |
98 | * buffer as default, notably write. | |
99 | */ | |
100 | setall() | |
101 | { | |
102 | ||
103 | if (addr2 == 0) { | |
104 | addr1 = one; | |
105 | addr2 = dol; | |
106 | if (dol == zero) { | |
107 | dot = zero; | |
108 | return; | |
109 | } | |
110 | } | |
111 | /* | |
112 | * Don't want to set previous context mark so use setdot1(). | |
113 | */ | |
114 | setdot1(); | |
115 | } | |
116 | ||
117 | /* | |
118 | * No address allowed on, e.g. the file command. | |
119 | */ | |
120 | setnoaddr() | |
121 | { | |
122 | ||
123 | if (addr2 != 0) | |
124 | error("No address allowed@on this command"); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Parse an address. | |
129 | * Just about any sequence of address characters is legal. | |
130 | * | |
131 | * If you are tricky you can use this routine and the = command | |
132 | * to do simple addition and subtraction of cardinals less | |
133 | * than the number of lines in the file. | |
134 | */ | |
135 | line * | |
13c5231e KB |
136 | address(inputline) |
137 | char *inputline; | |
f4d38626 MH |
138 | { |
139 | register line *addr; | |
140 | register int offset, c; | |
141 | short lastsign; | |
142 | ||
143 | bigmove = 0; | |
144 | lastsign = 0; | |
145 | offset = 0; | |
146 | addr = 0; | |
147 | for (;;) { | |
148 | if (isdigit(peekcd())) { | |
149 | if (addr == 0) { | |
150 | addr = zero; | |
151 | bigmove = 1; | |
152 | } | |
153 | loc1 = 0; | |
154 | addr += offset; | |
155 | offset = getnum(); | |
156 | if (lastsign >= 0) | |
157 | addr += offset; | |
158 | else | |
159 | addr -= offset; | |
160 | lastsign = 0; | |
161 | offset = 0; | |
162 | } | |
163 | switch (c = getcd()) { | |
164 | ||
165 | case '?': | |
166 | case '/': | |
167 | case '$': | |
168 | case '\'': | |
169 | case '\\': | |
170 | bigmove++; | |
171 | case '.': | |
172 | if (addr || offset) | |
173 | error("Badly formed address"); | |
174 | } | |
175 | offset += lastsign; | |
176 | lastsign = 0; | |
177 | switch (c) { | |
178 | ||
179 | case ' ': | |
180 | case '\t': | |
181 | continue; | |
182 | ||
183 | case '+': | |
184 | lastsign = 1; | |
185 | if (addr == 0) | |
186 | addr = dot; | |
187 | continue; | |
188 | ||
189 | case '^': | |
190 | case '-': | |
191 | lastsign = -1; | |
192 | if (addr == 0) | |
193 | addr = dot; | |
194 | continue; | |
195 | ||
196 | case '\\': | |
197 | case '?': | |
198 | case '/': | |
199 | c = compile(c, 1); | |
200 | notempty(); | |
201 | savere(scanre); | |
202 | addr = dot; | |
13c5231e | 203 | if (inputline && execute(0, dot)) { |
f4d38626 | 204 | if (c == '/') { |
13c5231e | 205 | while (loc1 <= inputline) { |
d266c416 MH |
206 | if (loc1 == loc2) |
207 | loc2++; | |
f4d38626 MH |
208 | if (!execute(1)) |
209 | goto nope; | |
ea87719e MH |
210 | } |
211 | break; | |
13c5231e | 212 | } else if (loc1 < inputline) { |
ea87719e MH |
213 | char *last; |
214 | doques: | |
215 | ||
216 | do { | |
217 | last = loc1; | |
218 | if (loc1 == loc2) | |
219 | loc2++; | |
220 | if (!execute(1)) | |
221 | break; | |
13c5231e | 222 | } while (loc1 < inputline); |
ea87719e MH |
223 | loc1 = last; |
224 | break; | |
225 | } | |
226 | } | |
227 | nope: | |
228 | for (;;) { | |
229 | if (c == '/') { | |
230 | addr++; | |
231 | if (addr > dol) { | |
232 | if (value(WRAPSCAN) == 0) | |
233 | error("No match to BOTTOM|Address search hit BOTTOM without matching pattern"); | |
234 | addr = zero; | |
235 | } | |
236 | } else { | |
237 | addr--; | |
238 | if (addr < zero) { | |
239 | if (value(WRAPSCAN) == 0) | |
240 | error("No match to TOP|Address search hit TOP without matching pattern"); | |
241 | addr = dol; | |
242 | } | |
243 | } | |
244 | if (execute(0, addr)) { | |
13c5231e KB |
245 | if (inputline && c == '?') { |
246 | inputline = &linebuf[LBSIZE]; | |
ea87719e MH |
247 | goto doques; |
248 | } | |
249 | break; | |
250 | } | |
251 | if (addr == dot) | |
252 | error("Fail|Pattern not found"); | |
253 | } | |
254 | continue; | |
255 | ||
256 | case '$': | |
257 | addr = dol; | |
258 | continue; | |
259 | ||
260 | case '.': | |
261 | addr = dot; | |
262 | continue; | |
263 | ||
264 | case '\'': | |
5a6c967e | 265 | c = markreg(ex_getchar()); |
ea87719e MH |
266 | if (c == 0) |
267 | error("Marks are ' and a-z"); | |
268 | addr = getmark(c); | |
269 | if (addr == 0) | |
270 | error("Undefined mark@referenced"); | |
271 | break; | |
272 | ||
273 | default: | |
274 | ungetchar(c); | |
275 | if (offset) { | |
276 | if (addr == 0) | |
277 | addr = dot; | |
278 | addr += offset; | |
279 | loc1 = 0; | |
280 | } | |
281 | if (addr == 0) { | |
282 | bigmove = 0; | |
283 | return (0); | |
284 | } | |
285 | if (addr != zero) | |
286 | notempty(); | |
287 | addr += lastsign; | |
288 | if (addr < zero) | |
289 | error("Negative address@- first buffer line is 1"); | |
290 | if (addr > dol) | |
291 | error("Not that many lines@in buffer"); | |
292 | return (addr); | |
293 | } | |
294 | } | |
295 | } | |
296 | ||
297 | /* | |
298 | * Abbreviations to make code smaller | |
299 | * Left over from squashing ex version 1.1 into | |
300 | * 11/34's and 11/40's. | |
301 | */ | |
302 | setCNL() | |
303 | { | |
304 | ||
305 | setcount(); | |
306 | newline(); | |
307 | } | |
308 | ||
309 | setNAEOL() | |
310 | { | |
311 | ||
312 | setnoaddr(); | |
313 | eol(); | |
314 | } |