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1.1 root 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 7.7 (Berkeley) 5/31/85
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: #include <sys/param.h>
51: #include <ctype.h>
52: #include <errno.h>
53: #include <signal.h>
54: #include <setjmp.h>
55: #include <sys/stat.h>
56:
57: #ifndef var
58: #define var extern
59: #endif
60: /*
61: * The following little dance copes with the new USG tty handling.
62: * This stuff has the advantage of considerable flexibility, and
63: * the disadvantage of being incompatible with anything else.
64: * The presence of the symbol USG3TTY will indicate the new code:
65: * in this case, we define CBREAK (because we can simulate it exactly),
66: * but we won't actually use it, so we set it to a value that will
67: * probably blow the compilation if we goof up.
68: */
69: #ifdef USG3TTY
70: #include <termio.h>
71: #define CBREAK xxxxx
72: #else
73: #include <sgtty.h>
74: #endif
75:
76: extern int errno;
77:
78: #ifndef VMUNIX
79: typedef short line;
80: #else
81: typedef int line;
82: #endif
83: typedef short bool;
84:
85: #include "ex_tune.h"
86: #include "ex_vars.h"
87: /*
88: * Options in the editor are referred to usually by "value(name)" where
89: * name is all uppercase, i.e. "value(PROMPT)". This is actually a macro
90: * which expands to a fixed field in a static structure and so generates
91: * very little code. The offsets for the option names in the structure
92: * are generated automagically from the structure initializing them in
93: * ex_data.c... see the shell script "makeoptions".
94: */
95: struct option {
96: char *oname;
97: char *oabbrev;
98: short otype; /* Types -- see below */
99: short odefault; /* Default value */
100: short ovalue; /* Current value */
101: char *osvalue;
102: };
103:
104: #define ONOFF 0
105: #define NUMERIC 1
106: #define STRING 2 /* SHELL or DIRECTORY */
107: #define OTERM 3
108:
109: #define value(a) options[a].ovalue
110: #define svalue(a) options[a].osvalue
111:
112: extern struct option options[NOPTS + 1];
113:
114:
115: /*
116: * The editor does not normally use the standard i/o library. Because
117: * we expect the editor to be a heavily used program and because it
118: * does a substantial amount of input/output processing it is appropriate
119: * for it to call low level read/write primitives directly. In fact,
120: * when debugging the editor we use the standard i/o library. In any
121: * case the editor needs a printf which prints through "putchar" ala the
122: * old version 6 printf. Thus we normally steal a copy of the "printf.c"
123: * and "strout" code from the standard i/o library and mung it for our
124: * purposes to avoid dragging in the stdio library headers, etc if we
125: * are not debugging. Such a modified printf exists in "printf.c" here.
126: */
127: #ifdef TRACE
128: # include <stdio.h>
129: var FILE *trace;
130: var bool trubble;
131: var bool techoin;
132: var char tracbuf[BUFSIZ];
133: # undef putchar
134: # undef getchar
135: #else
136: # ifdef VMUNIX
137: # define BUFSIZ 1024
138: # else
139: # ifdef u370
140: # define BUFSIZ 4096
141: # else
142: # define BUFSIZ 512
143: # endif
144: # endif
145: # define NULL 0
146: # define EOF -1
147: #endif
148:
149: /*
150: * Character constants and bits
151: *
152: * The editor uses the QUOTE bit as a flag to pass on with characters
153: * e.g. to the putchar routine. The editor never uses a simple char variable.
154: * Only arrays of and pointers to characters are used and parameters and
155: * registers are never declared character.
156: */
157: #define QUOTE 0200
158: #define TRIM 0177
159: #undef CTRL
160: #define CTRL(c) ('c' & 037)
161: #define NL CTRL(j)
162: #define CR CTRL(m)
163: #define DELETE 0177 /* See also ATTN, QUIT in ex_tune.h */
164: #define ESCAPE 033
165:
166: /*
167: * Miscellaneous random variables used in more than one place
168: */
169: var bool aiflag; /* Append/change/insert with autoindent */
170: var bool anymarks; /* We have used '[a-z] */
171: var int chng; /* Warn "No write" */
172: var char *Command;
173: var short defwind; /* -w# change default window size */
174: var int dirtcnt; /* When >= MAXDIRT, should sync temporary */
175: #ifdef TIOCLGET
176: var bool dosusp; /* Do SIGTSTP in visual when ^Z typed */
177: #endif
178: var bool edited; /* Current file is [Edited] */
179: var line *endcore; /* Last available core location */
180: extern bool endline; /* Last cmd mode command ended with \n */
181: #ifndef VMUNIX
182: var short erfile; /* Error message file unit */
183: #endif
184: var line *fendcore; /* First address in line pointer space */
185: var char file[FNSIZE]; /* Working file name */
186: var char genbuf[MAXBSIZE]; /* Working buffer when manipulating linebuf */
187: var bool hush; /* Command line option - was given, hush up! */
188: var char *globp; /* (Untyped) input string to command mode */
189: var bool holdcm; /* Don't cursor address */
190: var bool inappend; /* in ex command append mode */
191: var bool inglobal; /* Inside g//... or v//... */
192: var char *initev; /* Initial : escape for visual */
193: var bool inopen; /* Inside open or visual */
194: var char *input; /* Current position in cmd line input buffer */
195: var bool intty; /* Input is a tty */
196: var short io; /* General i/o unit (auto-closed on error!) */
197: extern short lastc; /* Last character ret'd from cmd input */
198: var bool laste; /* Last command was an "e" (or "rec") */
199: var char lastmac; /* Last macro called for ** */
200: var char lasttag[TAGSIZE]; /* Last argument to a tag command */
201: var char *linebp; /* Used in substituting in \n */
202: var char linebuf[LBSIZE]; /* The primary line buffer */
203: var bool listf; /* Command should run in list mode */
204: var char *loc1; /* Where re began to match (in linebuf) */
205: var char *loc2; /* First char after re match (") */
206: var line names['z'-'a'+2]; /* Mark registers a-z,' */
207: var int notecnt; /* Count for notify (to visual from cmd) */
208: var bool numberf; /* Command should run in number mode */
209: var char obuf[BUFSIZ]; /* Buffer for tty output */
210: var short oprompt; /* Saved during source */
211: extern short ospeed; /* Output speed (from gtty) */
212: var int otchng; /* Backup tchng to find changes in macros */
213: var short peekc; /* Peek ahead character (cmd mode input) */
214: var char *pkill[2]; /* Trim for put with ragged (LISP) delete */
215: var bool pfast; /* Have stty -nl'ed to go faster */
216: var int pid; /* Process id of child */
217: var int ppid; /* Process id of parent (e.g. main ex proc) */
218: var jmp_buf resetlab; /* For error throws to top level (cmd mode) */
219: var int rpid; /* Pid returned from wait() */
220: var bool ruptible; /* Interruptible is normal state */
221: var bool seenprompt; /* 1 if have gotten user input */
222: var bool shudclob; /* Have a prompt to clobber (e.g. on ^D) */
223: var int status; /* Status returned from wait() */
224: var int tchng; /* If nonzero, then [Modified] */
225: extern short tfile; /* Temporary file unit */
226: var bool vcatch; /* Want to catch an error (open/visual) */
227: var jmp_buf vreslab; /* For error throws to a visual catch */
228: var bool writing; /* 1 if in middle of a file write */
229: var int xchng; /* Suppresses multiple "No writes" in !cmd */
230: var long bsize; /* Block size for disk i/o */
231:
232: /*
233: * Macros
234: */
235: #define CP(a, b) (ignore(strcpy(a, b)))
236: /*
237: * FIXUNDO: do we want to mung undo vars?
238: * Usually yes unless in a macro or global.
239: */
240: #define FIXUNDO (inopen >= 0 && (inopen || !inglobal))
241: #define ckaw() {if (chng && value(AUTOWRITE)) wop(0);}
242: #define copy(a,b,c) Copy((char *) a, (char *) b, c)
243: #define eq(a, b) ((a) && (b) && strcmp(a, b) == 0)
244: #define getexit(a) copy(a, resetlab, sizeof (jmp_buf))
245: #define lastchar() lastc
246: #define outchar(c) (*Outchar)(c)
247: #define pastwh() (ignore(skipwh()))
248: #define pline(no) (*Pline)(no)
249: #define reset() longjmp(resetlab,1)
250: #define resexit(a) copy(resetlab, a, sizeof (jmp_buf))
251: #define setexit() setjmp(resetlab)
252: #define setlastchar(c) lastc = c
253: #define ungetchar(c) peekc = c
254:
255: #define CATCH vcatch = 1; if (setjmp(vreslab) == 0) {
256: #define ONERR } else { vcatch = 0;
257: #define ENDCATCH } vcatch = 0;
258:
259: /*
260: * Environment like memory
261: */
262: var char altfile[FNSIZE]; /* Alternate file name */
263: extern char direct[ONMSZ]; /* Temp file goes here */
264: extern char shell[ONMSZ]; /* Copied to be settable */
265: extern char ttytype[ONMSZ]; /* A long and pretty name */
266: var char uxb[UXBSIZE + 2]; /* Last !command for !! */
267:
268: /*
269: * The editor data structure for accessing the current file consists
270: * of an incore array of pointers into the temporary file tfile.
271: * Each pointer is 15 bits (the low bit is used by global) and is
272: * padded with zeroes to make an index into the temp file where the
273: * actual text of the line is stored.
274: *
275: * To effect undo, copies of affected lines are saved after the last
276: * line considered to be in the buffer, between dol and unddol.
277: * During an open or visual, which uses the command mode undo between
278: * dol and unddol, a copy of the entire, pre-command buffer state
279: * is saved between unddol and truedol.
280: */
281: var line *addr1; /* First addressed line in a command */
282: var line *addr2; /* Second addressed line */
283: var line *dol; /* Last line in buffer */
284: var line *dot; /* Current line */
285: var line *one; /* First line */
286: var line *truedol; /* End of all lines, including saves */
287: var line *unddol; /* End of undo saved lines */
288: var line *zero; /* Points to empty slot before one */
289:
290: /*
291: * Undo information
292: *
293: * For most commands we save lines changed by salting them away between
294: * dol and unddol before they are changed (i.e. we save the descriptors
295: * into the temp file tfile which is never garbage collected). The
296: * lines put here go back after unddel, and to complete the undo
297: * we delete the lines [undap1,undap2).
298: *
299: * Undoing a move is much easier and we treat this as a special case.
300: * Similarly undoing a "put" is a special case for although there
301: * are lines saved between dol and unddol we don't stick these back
302: * into the buffer.
303: */
304: var short undkind;
305:
306: var line *unddel; /* Saved deleted lines go after here */
307: var line *undap1; /* Beginning of new lines */
308: var line *undap2; /* New lines end before undap2 */
309: var line *undadot; /* If we saved all lines, dot reverts here */
310:
311: #define UNDCHANGE 0
312: #define UNDMOVE 1
313: #define UNDALL 2
314: #define UNDNONE 3
315: #define UNDPUT 4
316:
317: #ifdef CRYPT
318: /*
319: * Various miscellaneous flags and buffers needed by the encryption routines.
320: */
321: #define KSIZE 9 /* key size for encryption */
322: #define KEYPROMPT "Key: "
323: var int xflag; /* True if we are in encryption mode */
324: var int xtflag; /* True if the temp file is being encrypted */
325: var int kflag; /* True if the key has been accepted */
326: var char perm[768];
327: var char tperm[768];
328: var char *key;
329: var char crbuf[CRSIZE];
330: char *getpass();
331: #endif
332:
333: /*
334: * Function type definitions
335: */
336: #define NOSTR (char *) 0
337: #define NOLINE (line *) 0
338:
339: extern int (*Outchar)();
340: extern int (*Pline)();
341: extern int (*Putchar)();
342: var int (*oldhup)();
343: int (*setlist())();
344: int (*setnorm())();
345: int (*setnorm())();
346: int (*setnumb())();
347: line *address();
348: char *cgoto();
349: char *genindent();
350: char *getblock();
351: char *getenv();
352: line *getmark();
353: char *longname();
354: char *mesg();
355: char *place();
356: char *plural();
357: line *scanfor();
358: line *setin();
359: char *strcat();
360: char *strcpy();
361: char *strend();
362: char *tailpath();
363: char *tgetstr();
364: char *tgoto();
365: char *ttyname();
366: line *vback();
367: char *vfindcol();
368: char *vgetline();
369: char *vinit();
370: char *vpastwh();
371: char *vskipwh();
372: int put();
373: int putreg();
374: int YANKreg();
375: int delete();
376: int execl();
377: int filter();
378: int getfile();
379: int getsub();
380: int gettty();
381: int join();
382: int listchar();
383: off_t lseek();
384: int normchar();
385: int normline();
386: int numbline();
387: var int (*oldquit)();
388: int onhup();
389: int onintr();
390: int onsusp();
391: int putch();
392: int shift();
393: int termchar();
394: int vfilter();
395: #ifdef CBREAK
396: int vintr();
397: #endif
398: int vputch();
399: int vshftop();
400: int yank();
401:
402: /*
403: * C doesn't have a (void) cast, so we have to fake it for lint's sake.
404: */
405: #ifdef lint
406: # define ignore(a) Ignore((char *) (a))
407: # define ignorf(a) Ignorf((int (*) ()) (a))
408: #else
409: # define ignore(a) a
410: # define ignorf(a) a
411: #endif
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