| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | * |
| 6 | * @(#)ex.h 7.8 (Berkeley) %G% |
| 7 | */ |
| 8 | |
| 9 | #ifdef V6 |
| 10 | #include <retrofit.h> |
| 11 | #endif |
| 12 | |
| 13 | /* |
| 14 | * Ex version 3 (see exact version in ex_cmds.c, search for /Version/) |
| 15 | * |
| 16 | * Mark Horton, UC Berkeley |
| 17 | * Bill Joy, UC Berkeley |
| 18 | * November 1979 |
| 19 | * |
| 20 | * This file contains most of the declarations common to a large number |
| 21 | * of routines. The file ex_vis.h contains declarations |
| 22 | * which are used only inside the screen editor. |
| 23 | * The file ex_tune.h contains parameters which can be diddled per installation. |
| 24 | * |
| 25 | * The declarations relating to the argument list, regular expressions, |
| 26 | * the temporary file data structure used by the editor |
| 27 | * and the data describing terminals are each fairly substantial and |
| 28 | * are kept in the files ex_{argv,re,temp,tty}.h which |
| 29 | * we #include separately. |
| 30 | * |
| 31 | * If you are going to dig into ex, you should look at the outline of the |
| 32 | * distribution of the code into files at the beginning of ex.c and ex_v.c. |
| 33 | * Code which is similar to that of ed is lightly or undocumented in spots |
| 34 | * (e.g. the regular expression code). Newer code (e.g. open and visual) |
| 35 | * is much more carefully documented, and still rough in spots. |
| 36 | * |
| 37 | * Please forward bug reports to |
| 38 | * |
| 39 | * Mark Horton |
| 40 | * Computer Science Division, EECS |
| 41 | * EVANS HALL |
| 42 | * U.C. Berkeley 94704 |
| 43 | * (415) 642-4948 |
| 44 | * (415) 642-1024 (dept. office) |
| 45 | * |
| 46 | * or to csvax.mark@berkeley on the ARPA-net. I would particularly like to hear |
| 47 | * of additional terminal descriptions you add to the termcap data base. |
| 48 | */ |
| 49 | |
| 50 | #ifndef vms |
| 51 | #include <sys/param.h> |
| 52 | #else |
| 53 | #define MAXBSIZE 1024 /* Maximum block size */ |
| 54 | #include <types.h> |
| 55 | #endif |
| 56 | #include <ctype.h> |
| 57 | #include <errno.h> |
| 58 | #include <signal.h> |
| 59 | #include <setjmp.h> |
| 60 | #ifndef vms |
| 61 | #include <sys/stat.h> |
| 62 | #else |
| 63 | #include <stat.h> |
| 64 | #endif |
| 65 | |
| 66 | #ifndef var |
| 67 | #define var extern |
| 68 | #endif |
| 69 | /* |
| 70 | * The following little dance copes with the new USG tty handling. |
| 71 | * This stuff has the advantage of considerable flexibility, and |
| 72 | * the disadvantage of being incompatible with anything else. |
| 73 | * The presence of the symbol USG3TTY will indicate the new code: |
| 74 | * in this case, we define CBREAK (because we can simulate it exactly), |
| 75 | * but we won't actually use it, so we set it to a value that will |
| 76 | * probably blow the compilation if we goof up. |
| 77 | */ |
| 78 | #ifdef USG3TTY |
| 79 | #include <termio.h> |
| 80 | #define CBREAK xxxxx |
| 81 | #else |
| 82 | #ifndef vms |
| 83 | #include <sgtty.h> |
| 84 | #else |
| 85 | #include "vmstty.h" |
| 86 | #endif |
| 87 | #endif |
| 88 | |
| 89 | extern int errno; |
| 90 | |
| 91 | #ifndef VMUNIX |
| 92 | typedef short line; |
| 93 | #else |
| 94 | typedef int line; |
| 95 | #endif |
| 96 | typedef short bool; |
| 97 | |
| 98 | #include "ex_tune.h" |
| 99 | #include "ex_vars.h" |
| 100 | /* |
| 101 | * Options in the editor are referred to usually by "value(name)" where |
| 102 | * name is all uppercase, i.e. "value(PROMPT)". This is actually a macro |
| 103 | * which expands to a fixed field in a static structure and so generates |
| 104 | * very little code. The offsets for the option names in the structure |
| 105 | * are generated automagically from the structure initializing them in |
| 106 | * ex_data.c... see the shell script "makeoptions". |
| 107 | */ |
| 108 | struct option { |
| 109 | char *oname; |
| 110 | char *oabbrev; |
| 111 | short otype; /* Types -- see below */ |
| 112 | short odefault; /* Default value */ |
| 113 | short ovalue; /* Current value */ |
| 114 | char *osvalue; |
| 115 | }; |
| 116 | |
| 117 | #define ONOFF 0 |
| 118 | #define NUMERIC 1 |
| 119 | #define STRING 2 /* SHELL or DIRECTORY */ |
| 120 | #define OTERM 3 |
| 121 | |
| 122 | #define value(a) options[a].ovalue |
| 123 | #define svalue(a) options[a].osvalue |
| 124 | |
| 125 | extern struct option options[NOPTS + 1]; |
| 126 | |
| 127 | #ifdef vms |
| 128 | #define st_blksize st_fab_mrs |
| 129 | #define _exit(n) vms_exit(n) |
| 130 | #define fork() vfork() |
| 131 | #endif |
| 132 | |
| 133 | /* |
| 134 | * The editor does not normally use the standard i/o library. Because |
| 135 | * we expect the editor to be a heavily used program and because it |
| 136 | * does a substantial amount of input/output processing it is appropriate |
| 137 | * for it to call low level read/write primitives directly. In fact, |
| 138 | * when debugging the editor we use the standard i/o library. In any |
| 139 | * case the editor needs a printf which prints through "putchar" ala the |
| 140 | * old version 6 printf. Thus we normally steal a copy of the "printf.c" |
| 141 | * and "strout" code from the standard i/o library and mung it for our |
| 142 | * purposes to avoid dragging in the stdio library headers, etc if we |
| 143 | * are not debugging. Such a modified printf exists in "printf.c" here. |
| 144 | */ |
| 145 | #ifdef TRACE |
| 146 | # include <stdio.h> |
| 147 | var FILE *trace; |
| 148 | var bool trubble; |
| 149 | var bool techoin; |
| 150 | var char tracbuf[BUFSIZ]; |
| 151 | #else |
| 152 | # ifdef VMUNIX |
| 153 | # define BUFSIZ 1024 |
| 154 | # else |
| 155 | # ifdef u370 |
| 156 | # define BUFSIZ 4096 |
| 157 | # else |
| 158 | # define BUFSIZ 512 |
| 159 | # endif |
| 160 | # endif |
| 161 | # define NULL 0 |
| 162 | # define EOF -1 |
| 163 | #endif |
| 164 | |
| 165 | /* |
| 166 | * Character constants and bits |
| 167 | * |
| 168 | * The editor uses the QUOTE bit as a flag to pass on with characters |
| 169 | * e.g. to the putchar routine. The editor never uses a simple char variable. |
| 170 | * Only arrays of and pointers to characters are used and parameters and |
| 171 | * registers are never declared character. |
| 172 | */ |
| 173 | #define QUOTE 0200 |
| 174 | #define TRIM 0177 |
| 175 | #ifndef vms |
| 176 | #undef CTRL |
| 177 | #endif |
| 178 | #define CTRL(c) ('c' & 037) |
| 179 | #define NL CTRL(j) |
| 180 | #define CR CTRL(m) |
| 181 | #define DELETE 0177 /* See also ATTN, QUIT in ex_tune.h */ |
| 182 | #define ESCAPE 033 |
| 183 | |
| 184 | /* |
| 185 | * Miscellaneous random variables used in more than one place |
| 186 | */ |
| 187 | var bool aiflag; /* Append/change/insert with autoindent */ |
| 188 | var bool anymarks; /* We have used '[a-z] */ |
| 189 | var int chng; /* Warn "No write" */ |
| 190 | var char *Command; |
| 191 | var short defwind; /* -w# change default window size */ |
| 192 | var int dirtcnt; /* When >= MAXDIRT, should sync temporary */ |
| 193 | #ifdef TIOCLGET |
| 194 | var bool dosusp; /* Do SIGTSTP in visual when ^Z typed */ |
| 195 | #endif |
| 196 | var bool edited; /* Current file is [Edited] */ |
| 197 | var line *endcore; /* Last available core location */ |
| 198 | extern bool endline; /* Last cmd mode command ended with \n */ |
| 199 | #ifdef EXSTRINGS |
| 200 | var short erfile; /* Error message file unit */ |
| 201 | #endif |
| 202 | var line *fendcore; /* First address in line pointer space */ |
| 203 | var char file[FNSIZE]; /* Working file name */ |
| 204 | var char genbuf[MAXBSIZE]; /* Working buffer when manipulating linebuf */ |
| 205 | var bool hush; /* Command line option - was given, hush up! */ |
| 206 | var char *globp; /* (Untyped) input string to command mode */ |
| 207 | var bool holdcm; /* Don't cursor address */ |
| 208 | var bool inappend; /* in ex command append mode */ |
| 209 | var bool inglobal; /* Inside g//... or v//... */ |
| 210 | var char *initev; /* Initial : escape for visual */ |
| 211 | var bool inopen; /* Inside open or visual */ |
| 212 | var char *input; /* Current position in cmd line input buffer */ |
| 213 | var bool intty; /* Input is a tty */ |
| 214 | var short io; /* General i/o unit (auto-closed on error!) */ |
| 215 | extern short lastc; /* Last character ret'd from cmd input */ |
| 216 | var bool laste; /* Last command was an "e" (or "rec") */ |
| 217 | var char lastmac; /* Last macro called for ** */ |
| 218 | var char lasttag[TAGSIZE]; /* Last argument to a tag command */ |
| 219 | var char *linebp; /* Used in substituting in \n */ |
| 220 | var char linebuf[LBSIZE]; /* The primary line buffer */ |
| 221 | var bool listf; /* Command should run in list mode */ |
| 222 | var char *loc1; /* Where re began to match (in linebuf) */ |
| 223 | var char *loc2; /* First char after re match (") */ |
| 224 | var line names['z'-'a'+2]; /* Mark registers a-z,' */ |
| 225 | var int notecnt; /* Count for notify (to visual from cmd) */ |
| 226 | var bool numberf; /* Command should run in number mode */ |
| 227 | var char obuf[BUFSIZ]; /* Buffer for tty output */ |
| 228 | var short oprompt; /* Saved during source */ |
| 229 | extern short ospeed; /* Output speed (from gtty) */ |
| 230 | var int otchng; /* Backup tchng to find changes in macros */ |
| 231 | var short peekc; /* Peek ahead character (cmd mode input) */ |
| 232 | var char *pkill[2]; /* Trim for put with ragged (LISP) delete */ |
| 233 | var bool pfast; /* Have stty -nl'ed to go faster */ |
| 234 | var int pid; /* Process id of child */ |
| 235 | var int ppid; /* Process id of parent (e.g. main ex proc) */ |
| 236 | var jmp_buf resetlab; /* For error throws to top level (cmd mode) */ |
| 237 | var int rpid; /* Pid returned from wait() */ |
| 238 | var bool ruptible; /* Interruptible is normal state */ |
| 239 | var bool seenprompt; /* 1 if have gotten user input */ |
| 240 | var bool shudclob; /* Have a prompt to clobber (e.g. on ^D) */ |
| 241 | var int status; /* Status returned from wait() */ |
| 242 | var int tchng; /* If nonzero, then [Modified] */ |
| 243 | extern short tfile; /* Temporary file unit */ |
| 244 | var bool vcatch; /* Want to catch an error (open/visual) */ |
| 245 | var jmp_buf vreslab; /* For error throws to a visual catch */ |
| 246 | var bool writing; /* 1 if in middle of a file write */ |
| 247 | var int xchng; /* Suppresses multiple "No writes" in !cmd */ |
| 248 | var long bsize; /* Block size for disk i/o */ |
| 249 | |
| 250 | /* |
| 251 | * Macros |
| 252 | */ |
| 253 | #define CP(a, b) (ignore(strcpy(a, b))) |
| 254 | /* |
| 255 | * FIXUNDO: do we want to mung undo vars? |
| 256 | * Usually yes unless in a macro or global. |
| 257 | */ |
| 258 | #define FIXUNDO (inopen >= 0 && (inopen || !inglobal)) |
| 259 | #define ckaw() {if (chng && value(AUTOWRITE)) wop(0);} |
| 260 | #define copy(a,b,c) Copy((char *) a, (char *) b, c) |
| 261 | #define eq(a, b) ((a) && (b) && strcmp(a, b) == 0) |
| 262 | #define getexit(a) copy(a, resetlab, sizeof (jmp_buf)) |
| 263 | #define lastchar() lastc |
| 264 | #define outchar(c) (*Outchar)(c) |
| 265 | #define pastwh() (ignore(skipwh())) |
| 266 | #define pline(no) (*Pline)(no) |
| 267 | #define reset() longjmp(resetlab,1) |
| 268 | #define resexit(a) copy(resetlab, a, sizeof (jmp_buf)) |
| 269 | #define setexit() setjmp(resetlab) |
| 270 | #define setlastchar(c) lastc = c |
| 271 | #define ungetchar(c) peekc = c |
| 272 | |
| 273 | #define CATCH vcatch = 1; if (setjmp(vreslab) == 0) { |
| 274 | #define ONERR } else { vcatch = 0; |
| 275 | #define ENDCATCH } vcatch = 0; |
| 276 | |
| 277 | /* |
| 278 | * Environment like memory |
| 279 | */ |
| 280 | var char altfile[FNSIZE]; /* Alternate file name */ |
| 281 | extern char direct[ONMSZ]; /* Temp file goes here */ |
| 282 | extern char shell[ONMSZ]; /* Copied to be settable */ |
| 283 | extern char ttytype[ONMSZ]; /* A long and pretty name */ |
| 284 | var char uxb[UXBSIZE + 2]; /* Last !command for !! */ |
| 285 | |
| 286 | /* |
| 287 | * The editor data structure for accessing the current file consists |
| 288 | * of an incore array of pointers into the temporary file tfile. |
| 289 | * Each pointer is 15 bits (the low bit is used by global) and is |
| 290 | * padded with zeroes to make an index into the temp file where the |
| 291 | * actual text of the line is stored. |
| 292 | * |
| 293 | * To effect undo, copies of affected lines are saved after the last |
| 294 | * line considered to be in the buffer, between dol and unddol. |
| 295 | * During an open or visual, which uses the command mode undo between |
| 296 | * dol and unddol, a copy of the entire, pre-command buffer state |
| 297 | * is saved between unddol and truedol. |
| 298 | */ |
| 299 | var line *addr1; /* First addressed line in a command */ |
| 300 | var line *addr2; /* Second addressed line */ |
| 301 | var line *dol; /* Last line in buffer */ |
| 302 | var line *dot; /* Current line */ |
| 303 | var line *one; /* First line */ |
| 304 | var line *truedol; /* End of all lines, including saves */ |
| 305 | var line *unddol; /* End of undo saved lines */ |
| 306 | var line *zero; /* Points to empty slot before one */ |
| 307 | |
| 308 | /* |
| 309 | * Undo information |
| 310 | * |
| 311 | * For most commands we save lines changed by salting them away between |
| 312 | * dol and unddol before they are changed (i.e. we save the descriptors |
| 313 | * into the temp file tfile which is never garbage collected). The |
| 314 | * lines put here go back after unddel, and to complete the undo |
| 315 | * we delete the lines [undap1,undap2). |
| 316 | * |
| 317 | * Undoing a move is much easier and we treat this as a special case. |
| 318 | * Similarly undoing a "put" is a special case for although there |
| 319 | * are lines saved between dol and unddol we don't stick these back |
| 320 | * into the buffer. |
| 321 | */ |
| 322 | var short undkind; |
| 323 | |
| 324 | var line *unddel; /* Saved deleted lines go after here */ |
| 325 | var line *undap1; /* Beginning of new lines */ |
| 326 | var line *undap2; /* New lines end before undap2 */ |
| 327 | var line *undadot; /* If we saved all lines, dot reverts here */ |
| 328 | |
| 329 | #define UNDCHANGE 0 |
| 330 | #define UNDMOVE 1 |
| 331 | #define UNDALL 2 |
| 332 | #define UNDNONE 3 |
| 333 | #define UNDPUT 4 |
| 334 | |
| 335 | |
| 336 | /* |
| 337 | * Function type definitions |
| 338 | */ |
| 339 | #define NOSTR (char *) 0 |
| 340 | #define NOLINE (line *) 0 |
| 341 | |
| 342 | extern int (*Outchar)(); |
| 343 | extern int (*Pline)(); |
| 344 | extern int (*Put_char)(); |
| 345 | var int (*oldhup)(); |
| 346 | int (*setlist())(); |
| 347 | int (*setnorm())(); |
| 348 | int (*setnorm())(); |
| 349 | int (*setnumb())(); |
| 350 | line *address(); |
| 351 | char *cgoto(); |
| 352 | char *genindent(); |
| 353 | char *getblock(); |
| 354 | char *getenv(); |
| 355 | #ifdef vms |
| 356 | char *getlog(); |
| 357 | #endif |
| 358 | line *getmark(); |
| 359 | char *longname(); |
| 360 | char *mesg(); |
| 361 | char *place(); |
| 362 | char *plural(); |
| 363 | line *scanfor(); |
| 364 | line *setin(); |
| 365 | char *strcat(); |
| 366 | char *strcpy(); |
| 367 | char *strend(); |
| 368 | char *tailpath(); |
| 369 | char *tgetstr(); |
| 370 | char *tgoto(); |
| 371 | char *ttyname(); |
| 372 | line *vback(); |
| 373 | char *vfindcol(); |
| 374 | char *vgetline(); |
| 375 | char *vinit(); |
| 376 | char *vpastwh(); |
| 377 | char *vskipwh(); |
| 378 | int put(); |
| 379 | int putreg(); |
| 380 | int YANKreg(); |
| 381 | int ex_delete(); |
| 382 | int execl(); |
| 383 | int filter(); |
| 384 | int getfile(); |
| 385 | int getsub(); |
| 386 | int gettty(); |
| 387 | int join(); |
| 388 | int listchar(); |
| 389 | off_t lseek(); |
| 390 | int normchar(); |
| 391 | int normline(); |
| 392 | int numbline(); |
| 393 | var int (*oldquit)(); |
| 394 | int onhup(); |
| 395 | int onintr(); |
| 396 | int onsusp(); |
| 397 | int putch(); |
| 398 | int shift(); |
| 399 | int termchar(); |
| 400 | int vfilter(); |
| 401 | #ifdef CBREAK |
| 402 | int vintr(); |
| 403 | #endif |
| 404 | int vputch(); |
| 405 | int vshftop(); |
| 406 | int yank(); |
| 407 | |
| 408 | /* |
| 409 | * C doesn't have a (void) cast, so we have to fake it for lint's sake. |
| 410 | */ |
| 411 | #ifdef lint |
| 412 | # define ignore(a) Ignore((char *) (a)) |
| 413 | # define ignorf(a) Ignorf((int (*) ()) (a)) |
| 414 | #else |
| 415 | # define ignore(a) a |
| 416 | # define ignorf(a) a |
| 417 | #endif |