Commit | Line | Data |
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299f2784 | 1 | /* Copyright (c) 1981 Regents of the University of California */ |
3c7b865a | 2 | /* sccs id: @(#)ex.h 7.4 %G% */ |
e753e5e9 MH |
3 | #ifdef V6 |
4 | #include <retrofit.h> | |
5 | #endif | |
6 | ||
7 | /* | |
d266c416 | 8 | * Ex version 3 (see exact version in ex_cmds.c, search for /Version/) |
e753e5e9 MH |
9 | * |
10 | * Mark Horton, UC Berkeley | |
11 | * Bill Joy, UC Berkeley | |
12 | * November 1979 | |
13 | * | |
14 | * This file contains most of the declarations common to a large number | |
15 | * of routines. The file ex_vis.h contains declarations | |
16 | * which are used only inside the screen editor. | |
17 | * The file ex_tune.h contains parameters which can be diddled per installation. | |
18 | * | |
19 | * The declarations relating to the argument list, regular expressions, | |
20 | * the temporary file data structure used by the editor | |
21 | * and the data describing terminals are each fairly substantial and | |
22 | * are kept in the files ex_{argv,re,temp,tty}.h which | |
23 | * we #include separately. | |
24 | * | |
25 | * If you are going to dig into ex, you should look at the outline of the | |
26 | * distribution of the code into files at the beginning of ex.c and ex_v.c. | |
27 | * Code which is similar to that of ed is lightly or undocumented in spots | |
28 | * (e.g. the regular expression code). Newer code (e.g. open and visual) | |
29 | * is much more carefully documented, and still rough in spots. | |
30 | * | |
31 | * Please forward bug reports to | |
32 | * | |
d266c416 | 33 | * Mark Horton |
e753e5e9 MH |
34 | * Computer Science Division, EECS |
35 | * EVANS HALL | |
36 | * U.C. Berkeley 94704 | |
37 | * (415) 642-4948 | |
38 | * (415) 642-1024 (dept. office) | |
39 | * | |
d266c416 | 40 | * or to csvax.mark@berkeley on the ARPA-net. I would particularly like to hear |
e753e5e9 MH |
41 | * of additional terminal descriptions you add to the termcap data base. |
42 | */ | |
43 | ||
44 | #include <sys/types.h> | |
45 | #include <ctype.h> | |
46 | #include <errno.h> | |
e753e5e9 MH |
47 | #include <signal.h> |
48 | #include <setjmp.h> | |
49 | #include <sys/stat.h> | |
50 | ||
cb3ac212 | 51 | #ifndef var |
ad1e86b1 | 52 | #define var extern |
cb3ac212 | 53 | #endif |
d266c416 MH |
54 | /* |
55 | * The following little dance copes with the new USG tty handling. | |
56 | * This stuff has the advantage of considerable flexibility, and | |
57 | * the disadvantage of being incompatible with anything else. | |
58 | * The presence of the symbol USG3TTY will indicate the new code: | |
59 | * in this case, we define CBREAK (because we can simulate it exactly), | |
60 | * but we won't actually use it, so we set it to a value that will | |
61 | * probably blow the compilation if we goof up. | |
62 | */ | |
63 | #ifdef USG3TTY | |
64 | #include <termio.h> | |
65 | #define CBREAK xxxxx | |
66 | #else | |
67 | #include <sgtty.h> | |
68 | #endif | |
69 | ||
e753e5e9 MH |
70 | extern int errno; |
71 | ||
44232d5b | 72 | #ifndef VMUNIX |
e753e5e9 | 73 | typedef short line; |
44232d5b MH |
74 | #else |
75 | typedef int line; | |
76 | #endif | |
e753e5e9 MH |
77 | typedef short bool; |
78 | ||
79 | #include "ex_tune.h" | |
80 | #include "ex_vars.h" | |
81 | /* | |
82 | * Options in the editor are referred to usually by "value(name)" where | |
83 | * name is all uppercase, i.e. "value(PROMPT)". This is actually a macro | |
84 | * which expands to a fixed field in a static structure and so generates | |
85 | * very little code. The offsets for the option names in the structure | |
86 | * are generated automagically from the structure initializing them in | |
87 | * ex_data.c... see the shell script "makeoptions". | |
88 | */ | |
89 | struct option { | |
90 | char *oname; | |
91 | char *oabbrev; | |
92 | short otype; /* Types -- see below */ | |
93 | short odefault; /* Default value */ | |
94 | short ovalue; /* Current value */ | |
95 | char *osvalue; | |
96 | }; | |
97 | ||
98 | #define ONOFF 0 | |
99 | #define NUMERIC 1 | |
100 | #define STRING 2 /* SHELL or DIRECTORY */ | |
101 | #define OTERM 3 | |
102 | ||
103 | #define value(a) options[a].ovalue | |
104 | #define svalue(a) options[a].osvalue | |
105 | ||
cb3ac212 | 106 | extern struct option options[NOPTS + 1]; |
e753e5e9 MH |
107 | |
108 | ||
109 | /* | |
110 | * The editor does not normally use the standard i/o library. Because | |
111 | * we expect the editor to be a heavily used program and because it | |
112 | * does a substantial amount of input/output processing it is appropriate | |
113 | * for it to call low level read/write primitives directly. In fact, | |
114 | * when debugging the editor we use the standard i/o library. In any | |
115 | * case the editor needs a printf which prints through "putchar" ala the | |
116 | * old version 6 printf. Thus we normally steal a copy of the "printf.c" | |
117 | * and "strout" code from the standard i/o library and mung it for our | |
118 | * purposes to avoid dragging in the stdio library headers, etc if we | |
119 | * are not debugging. Such a modified printf exists in "printf.c" here. | |
120 | */ | |
121 | #ifdef TRACE | |
122 | # include <stdio.h> | |
cb3ac212 MH |
123 | var FILE *trace; |
124 | var bool trubble; | |
125 | var bool techoin; | |
126 | var char tracbuf[BUFSIZ]; | |
e753e5e9 MH |
127 | # undef putchar |
128 | # undef getchar | |
129 | #else | |
887e3e0d | 130 | # ifdef VMUNIX |
44232d5b | 131 | # define BUFSIZ 1024 |
887e3e0d | 132 | # else |
3c7b865a MH |
133 | # ifdef u370 |
134 | # define BUFSIZ 4096 | |
135 | # else | |
e753e5e9 | 136 | # define BUFSIZ 512 |
3c7b865a | 137 | # endif |
887e3e0d | 138 | # endif |
e753e5e9 MH |
139 | # define NULL 0 |
140 | # define EOF -1 | |
141 | #endif | |
142 | ||
143 | /* | |
144 | * Character constants and bits | |
145 | * | |
146 | * The editor uses the QUOTE bit as a flag to pass on with characters | |
147 | * e.g. to the putchar routine. The editor never uses a simple char variable. | |
148 | * Only arrays of and pointers to characters are used and parameters and | |
149 | * registers are never declared character. | |
150 | */ | |
151 | #define QUOTE 0200 | |
152 | #define TRIM 0177 | |
153 | #define CTRL(c) ('c' & 037) | |
154 | #define NL CTRL(j) | |
155 | #define CR CTRL(m) | |
156 | #define DELETE 0177 /* See also ATTN, QUIT in ex_tune.h */ | |
157 | #define ESCAPE 033 | |
158 | ||
159 | /* | |
160 | * Miscellaneous random variables used in more than one place | |
161 | */ | |
cb3ac212 MH |
162 | var bool aiflag; /* Append/change/insert with autoindent */ |
163 | var bool anymarks; /* We have used '[a-z] */ | |
164 | var int chng; /* Warn "No write" */ | |
165 | var char *Command; | |
166 | var short defwind; /* -w# change default window size */ | |
167 | var int dirtcnt; /* When >= MAXDIRT, should sync temporary */ | |
d266c416 | 168 | #ifdef TIOCLGET |
cb3ac212 | 169 | var bool dosusp; /* Do SIGTSTP in visual when ^Z typed */ |
d266c416 | 170 | #endif |
cb3ac212 MH |
171 | var bool edited; /* Current file is [Edited] */ |
172 | var line *endcore; /* Last available core location */ | |
173 | extern bool endline; /* Last cmd mode command ended with \n */ | |
44232d5b | 174 | #ifndef VMUNIX |
cb3ac212 | 175 | var short erfile; /* Error message file unit */ |
44232d5b | 176 | #endif |
cb3ac212 MH |
177 | var line *fendcore; /* First address in line pointer space */ |
178 | var char file[FNSIZE]; /* Working file name */ | |
179 | var char genbuf[LBSIZE]; /* Working buffer when manipulating linebuf */ | |
180 | var bool hush; /* Command line option - was given, hush up! */ | |
181 | var char *globp; /* (Untyped) input string to command mode */ | |
182 | var bool holdcm; /* Don't cursor address */ | |
183 | var bool inappend; /* in ex command append mode */ | |
184 | var bool inglobal; /* Inside g//... or v//... */ | |
185 | var char *initev; /* Initial : escape for visual */ | |
186 | var bool inopen; /* Inside open or visual */ | |
187 | var char *input; /* Current position in cmd line input buffer */ | |
188 | var bool intty; /* Input is a tty */ | |
189 | var short io; /* General i/o unit (auto-closed on error!) */ | |
190 | extern short lastc; /* Last character ret'd from cmd input */ | |
191 | var bool laste; /* Last command was an "e" (or "rec") */ | |
192 | var char lastmac; /* Last macro called for ** */ | |
193 | var char lasttag[TAGSIZE]; /* Last argument to a tag command */ | |
194 | var char *linebp; /* Used in substituting in \n */ | |
195 | var char linebuf[LBSIZE]; /* The primary line buffer */ | |
196 | var bool listf; /* Command should run in list mode */ | |
197 | var char *loc1; /* Where re began to match (in linebuf) */ | |
198 | var char *loc2; /* First char after re match (") */ | |
199 | var line names['z'-'a'+2]; /* Mark registers a-z,' */ | |
200 | var int notecnt; /* Count for notify (to visual from cmd) */ | |
201 | var bool numberf; /* Command should run in number mode */ | |
202 | var char obuf[BUFSIZ]; /* Buffer for tty output */ | |
203 | var short oprompt; /* Saved during source */ | |
204 | extern short ospeed; /* Output speed (from gtty) */ | |
205 | var int otchng; /* Backup tchng to find changes in macros */ | |
206 | var short peekc; /* Peek ahead character (cmd mode input) */ | |
207 | var char *pkill[2]; /* Trim for put with ragged (LISP) delete */ | |
208 | var bool pfast; /* Have stty -nl'ed to go faster */ | |
209 | var int pid; /* Process id of child */ | |
210 | var int ppid; /* Process id of parent (e.g. main ex proc) */ | |
211 | var jmp_buf resetlab; /* For error throws to top level (cmd mode) */ | |
212 | var int rpid; /* Pid returned from wait() */ | |
213 | var bool ruptible; /* Interruptible is normal state */ | |
214 | var bool seenprompt; /* 1 if have gotten user input */ | |
215 | var bool shudclob; /* Have a prompt to clobber (e.g. on ^D) */ | |
216 | var int status; /* Status returned from wait() */ | |
217 | var int tchng; /* If nonzero, then [Modified] */ | |
218 | extern short tfile; /* Temporary file unit */ | |
219 | var bool vcatch; /* Want to catch an error (open/visual) */ | |
220 | var jmp_buf vreslab; /* For error throws to a visual catch */ | |
221 | var bool writing; /* 1 if in middle of a file write */ | |
222 | var int xchng; /* Suppresses multiple "No writes" in !cmd */ | |
e753e5e9 MH |
223 | |
224 | /* | |
225 | * Macros | |
226 | */ | |
227 | #define CP(a, b) (ignore(strcpy(a, b))) | |
887e3e0d MH |
228 | /* |
229 | * FIXUNDO: do we want to mung undo vars? | |
230 | * Usually yes unless in a macro or global. | |
231 | */ | |
232 | #define FIXUNDO (inopen >= 0 && (inopen || !inglobal)) | |
e753e5e9 MH |
233 | #define ckaw() {if (chng && value(AUTOWRITE)) wop(0);} |
234 | #define copy(a,b,c) Copy((char *) a, (char *) b, c) | |
235 | #define eq(a, b) ((a) && (b) && strcmp(a, b) == 0) | |
236 | #define getexit(a) copy(a, resetlab, sizeof (jmp_buf)) | |
237 | #define lastchar() lastc | |
238 | #define outchar(c) (*Outchar)(c) | |
239 | #define pastwh() (ignore(skipwh())) | |
240 | #define pline(no) (*Pline)(no) | |
241 | #define reset() longjmp(resetlab,1) | |
242 | #define resexit(a) copy(resetlab, a, sizeof (jmp_buf)) | |
243 | #define setexit() setjmp(resetlab) | |
244 | #define setlastchar(c) lastc = c | |
245 | #define ungetchar(c) peekc = c | |
246 | ||
247 | #define CATCH vcatch = 1; if (setjmp(vreslab) == 0) { | |
248 | #define ONERR } else { vcatch = 0; | |
249 | #define ENDCATCH } vcatch = 0; | |
250 | ||
251 | /* | |
252 | * Environment like memory | |
253 | */ | |
cb3ac212 MH |
254 | var char altfile[FNSIZE]; /* Alternate file name */ |
255 | extern char direct[ONMSZ]; /* Temp file goes here */ | |
256 | extern char shell[ONMSZ]; /* Copied to be settable */ | |
257 | extern char ttytype[ONMSZ]; /* A long and pretty name */ | |
258 | var char uxb[UXBSIZE + 2]; /* Last !command for !! */ | |
e753e5e9 MH |
259 | |
260 | /* | |
261 | * The editor data structure for accessing the current file consists | |
262 | * of an incore array of pointers into the temporary file tfile. | |
263 | * Each pointer is 15 bits (the low bit is used by global) and is | |
264 | * padded with zeroes to make an index into the temp file where the | |
265 | * actual text of the line is stored. | |
266 | * | |
267 | * To effect undo, copies of affected lines are saved after the last | |
268 | * line considered to be in the buffer, between dol and unddol. | |
269 | * During an open or visual, which uses the command mode undo between | |
270 | * dol and unddol, a copy of the entire, pre-command buffer state | |
271 | * is saved between unddol and truedol. | |
272 | */ | |
cb3ac212 MH |
273 | var line *addr1; /* First addressed line in a command */ |
274 | var line *addr2; /* Second addressed line */ | |
275 | var line *dol; /* Last line in buffer */ | |
276 | var line *dot; /* Current line */ | |
277 | var line *one; /* First line */ | |
278 | var line *truedol; /* End of all lines, including saves */ | |
279 | var line *unddol; /* End of undo saved lines */ | |
280 | var line *zero; /* Points to empty slot before one */ | |
e753e5e9 MH |
281 | |
282 | /* | |
283 | * Undo information | |
284 | * | |
285 | * For most commands we save lines changed by salting them away between | |
286 | * dol and unddol before they are changed (i.e. we save the descriptors | |
287 | * into the temp file tfile which is never garbage collected). The | |
288 | * lines put here go back after unddel, and to complete the undo | |
289 | * we delete the lines [undap1,undap2). | |
290 | * | |
291 | * Undoing a move is much easier and we treat this as a special case. | |
292 | * Similarly undoing a "put" is a special case for although there | |
293 | * are lines saved between dol and unddol we don't stick these back | |
294 | * into the buffer. | |
295 | */ | |
cb3ac212 | 296 | var short undkind; |
e753e5e9 | 297 | |
cb3ac212 MH |
298 | var line *unddel; /* Saved deleted lines go after here */ |
299 | var line *undap1; /* Beginning of new lines */ | |
300 | var line *undap2; /* New lines end before undap2 */ | |
301 | var line *undadot; /* If we saved all lines, dot reverts here */ | |
e753e5e9 MH |
302 | |
303 | #define UNDCHANGE 0 | |
304 | #define UNDMOVE 1 | |
305 | #define UNDALL 2 | |
306 | #define UNDNONE 3 | |
307 | #define UNDPUT 4 | |
308 | ||
1807bf33 | 309 | #ifdef CRYPT |
d266c416 MH |
310 | /* |
311 | * Various miscellaneous flags and buffers needed by the encryption routines. | |
312 | */ | |
313 | #define KSIZE 9 /* key size for encryption */ | |
314 | #define KEYPROMPT "Key: " | |
cb3ac212 MH |
315 | var int xflag; /* True if we are in encryption mode */ |
316 | var int xtflag; /* True if the temp file is being encrypted */ | |
317 | var int kflag; /* True if the key has been accepted */ | |
318 | var char perm[768]; | |
319 | var char tperm[768]; | |
320 | var char *key; | |
321 | var char crbuf[CRSIZE]; | |
d266c416 | 322 | char *getpass(); |
1807bf33 | 323 | #endif |
d266c416 | 324 | |
e753e5e9 MH |
325 | /* |
326 | * Function type definitions | |
327 | */ | |
328 | #define NOSTR (char *) 0 | |
329 | #define NOLINE (line *) 0 | |
330 | ||
cb3ac212 MH |
331 | extern int (*Outchar)(); |
332 | extern int (*Pline)(); | |
333 | extern int (*Putchar)(); | |
334 | var int (*oldhup)(); | |
e753e5e9 MH |
335 | int (*setlist())(); |
336 | int (*setnorm())(); | |
337 | int (*setnorm())(); | |
338 | int (*setnumb())(); | |
339 | line *address(); | |
340 | char *cgoto(); | |
341 | char *genindent(); | |
342 | char *getblock(); | |
343 | char *getenv(); | |
344 | line *getmark(); | |
345 | char *longname(); | |
346 | char *mesg(); | |
347 | char *place(); | |
348 | char *plural(); | |
349 | line *scanfor(); | |
350 | line *setin(); | |
351 | char *strcat(); | |
352 | char *strcpy(); | |
353 | char *strend(); | |
354 | char *tailpath(); | |
355 | char *tgetstr(); | |
356 | char *tgoto(); | |
357 | char *ttyname(); | |
358 | line *vback(); | |
359 | char *vfindcol(); | |
360 | char *vgetline(); | |
361 | char *vinit(); | |
362 | char *vpastwh(); | |
363 | char *vskipwh(); | |
364 | int put(); | |
365 | int putreg(); | |
366 | int YANKreg(); | |
367 | int delete(); | |
368 | int execl(); | |
369 | int filter(); | |
370 | int getfile(); | |
371 | int getsub(); | |
372 | int gettty(); | |
373 | int join(); | |
374 | int listchar(); | |
375 | off_t lseek(); | |
376 | int normchar(); | |
377 | int normline(); | |
378 | int numbline(); | |
cb3ac212 | 379 | var int (*oldquit)(); |
e753e5e9 MH |
380 | int onhup(); |
381 | int onintr(); | |
d266c416 | 382 | int onsusp(); |
e753e5e9 MH |
383 | int putch(); |
384 | int shift(); | |
385 | int termchar(); | |
386 | int vfilter(); | |
387 | #ifdef CBREAK | |
388 | int vintr(); | |
389 | #endif | |
390 | int vputch(); | |
391 | int vshftop(); | |
392 | int yank(); | |
393 | ||
394 | /* | |
395 | * C doesn't have a (void) cast, so we have to fake it for lint's sake. | |
396 | */ | |
397 | #ifdef lint | |
398 | # define ignore(a) Ignore((char *) (a)) | |
399 | # define ignorf(a) Ignorf((int (*) ()) (a)) | |
400 | #else | |
401 | # define ignore(a) a | |
402 | # define ignorf(a) a | |
403 | #endif |