1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 * Copyright (c) 1991, 1993, 1994, 1995, 1996
5 *	Keith Bostic.  All rights reserved.
6 *
7 * See the LICENSE file for redistribution information.
8 */
9
10#include "config.h"
11
12#include <sys/types.h>
13#include <sys/queue.h>
14#include <sys/stat.h>
15
16#include <bitstring.h>
17#include <ctype.h>
18#include <errno.h>
19#include <fcntl.h>
20#include <limits.h>
21#include <locale.h>
22#include <stdarg.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <unistd.h>
27
28#include "common.h"
29#include "../vi/vi.h"
30
31/*
32 * msgq --
33 *	Display a message.
34 *
35 * PUBLIC: void msgq(SCR *, mtype_t, const char *, ...);
36 */
37void
38msgq(SCR *sp, mtype_t mt, const char *fmt, ...)
39{
40#ifndef NL_ARGMAX
41#define	__NL_ARGMAX	20		/* Set to 9 by System V. */
42	struct {
43		const char *str;	/* String pointer. */
44		size_t	 arg;		/* Argument number. */
45		size_t	 prefix;	/* Prefix string length. */
46		size_t	 skip;		/* Skipped string length. */
47		size_t	 suffix;	/* Suffix string length. */
48	} str[__NL_ARGMAX];
49#endif
50	static int reenter;		/* STATIC: Re-entrancy check. */
51	GS *gp;
52	size_t blen, len, mlen, nlen;
53	const char *p;
54	char *bp, *mp;
55	va_list ap;
56#ifndef NL_ARGMAX
57	int ch;
58	char *rbp, *s_rbp;
59	const char *t, *u;
60	size_t cnt1, cnt2, soff;
61#endif
62
63	/*
64	 * !!!
65	 * It's possible to enter msg when there's no screen to hold the
66	 * message.  If sp is NULL, ignore the special cases and put the
67	 * message out to stderr.
68	 */
69	if (sp == NULL) {
70		gp = NULL;
71		if (mt == M_BERR)
72			mt = M_ERR;
73		else if (mt == M_VINFO)
74			mt = M_INFO;
75	} else {
76		gp = sp->gp;
77		switch (mt) {
78		case M_BERR:
79			if (F_ISSET(sp, SC_VI) && !O_ISSET(sp, O_VERBOSE)) {
80				F_SET(gp, G_BELLSCHED);
81				return;
82			}
83			mt = M_ERR;
84			break;
85		case M_VINFO:
86			if (!O_ISSET(sp, O_VERBOSE))
87				return;
88			mt = M_INFO;
89			/* FALLTHROUGH */
90		case M_INFO:
91			if (F_ISSET(sp, SC_EX_SILENT))
92				return;
93			break;
94		case M_ERR:
95		case M_SYSERR:
96			break;
97		default:
98			abort();
99		}
100	}
101
102	/*
103	 * It's possible to reenter msg when it allocates space.  We're
104	 * probably dead anyway, but there's no reason to drop core.
105	 *
106	 * XXX
107	 * Yes, there's a race, but it should only be two instructions.
108	 */
109	if (reenter++)
110		return;
111
112	/* Get space for the message. */
113	nlen = 1024;
114	if (0) {
115retry:		FREE_SPACE(sp, bp, blen);
116		nlen *= 2;
117	}
118	bp = NULL;
119	blen = 0;
120	GET_SPACE_GOTOC(sp, bp, blen, nlen);
121
122	/*
123	 * Error prefix.
124	 *
125	 * mp:	 pointer to the current next character to be written
126	 * mlen: length of the already written characters
127	 * blen: total length of the buffer
128	 */
129#define	REM	(blen - mlen)
130	mp = bp;
131	mlen = 0;
132	if (mt == M_SYSERR) {
133		p = msg_cat(sp, "020|Error: ", &len);
134		if (REM < len)
135			goto retry;
136		memcpy(mp, p, len);
137		mp += len;
138		mlen += len;
139	}
140
141	/*
142	 * If we're running an ex command that the user didn't enter, display
143	 * the file name and line number prefix.
144	 */
145	if ((mt == M_ERR || mt == M_SYSERR) &&
146	    sp != NULL && gp != NULL && gp->if_name != NULL) {
147		CHAR_T *wp;
148		size_t wlen;
149
150		CHAR2INT(sp, gp->if_name, strlen(gp->if_name) + 1, wp, wlen);
151		for (; *wp != '\0'; ++wp) {
152			len = snprintf(mp, REM, "%s", KEY_NAME(sp, *wp));
153			mp += len;
154			if ((mlen += len) > blen)
155				goto retry;
156		}
157		len = snprintf(mp, REM, ", %d: ", gp->if_lno);
158		mp += len;
159		if ((mlen += len) > blen)
160			goto retry;
161	}
162
163	/* If nothing to format, we're done. */
164	if (fmt == NULL)
165		goto nofmt;
166	fmt = msg_cat(sp, fmt, NULL);
167
168#ifndef NL_ARGMAX
169	/*
170	 * Nvi should run on machines that don't support the numbered argument
171	 * specifications (%[digit]*$).  We do this by reformatting the string
172	 * so that we can hand it to vsprintf(3) and it will use the arguments
173	 * in the right order.  When vsprintf returns, we put the string back
174	 * into the right order.  It's undefined, according to SVID III, to mix
175	 * numbered argument specifications with the standard style arguments,
176	 * so this should be safe.
177	 *
178	 * In addition, we also need a character that is known to not occur in
179	 * any vi message, for separating the parts of the string.  As callers
180	 * of msgq are responsible for making sure that all the non-printable
181	 * characters are formatted for printing before calling msgq, we use a
182	 * random non-printable character selected at terminal initialization
183	 * time.  This code isn't fast by any means, but as messages should be
184	 * relatively short and normally have only a few arguments, it won't be
185	 * too bad.  Regardless, nobody has come up with any other solution.
186	 *
187	 * The result of this loop is an array of pointers into the message
188	 * string, with associated lengths and argument numbers.  The array
189	 * is in the "correct" order, and the arg field contains the argument
190	 * order.
191	 */
192	for (p = fmt, soff = 0; soff < __NL_ARGMAX;) {
193		for (t = p; *p != '\0' && *p != '%'; ++p);
194		if (*p == '\0')
195			break;
196		++p;
197		if (!isdigit((u_char)*p)) {
198			if (*p == '%')
199				++p;
200			continue;
201		}
202		for (u = p; *++p != '\0' && isdigit((u_char)*p););
203		if (*p != '$')
204			continue;
205
206		/* Up to, and including the % character. */
207		str[soff].str = t;
208		str[soff].prefix = u - t;
209
210		/* Up to, and including the $ character. */
211		str[soff].arg = atoi(u);
212		str[soff].skip = (p - u) + 1;
213		if (str[soff].arg >= __NL_ARGMAX)
214			goto ret;
215
216		/* Up to, and including the conversion character. */
217		for (u = p; (ch = *++p) != '\0';)
218			if (isalpha(ch) &&
219			    strchr("diouxXfeEgGcspn", ch) != NULL)
220				break;
221		str[soff].suffix = p - u;
222		if (ch != '\0')
223			++p;
224		++soff;
225	}
226
227	/* If no magic strings, we're done. */
228	if (soff == 0)
229		goto format;
230
231	 /* Get space for the reordered strings. */
232	if ((rbp = malloc(nlen)) == NULL)
233		goto ret;
234	s_rbp = rbp;
235
236	/*
237	 * Reorder the strings into the message string based on argument
238	 * order.
239	 *
240	 * !!!
241	 * We ignore arguments that are out of order, i.e. if we don't find
242	 * an argument, we continue.  Assume (almost certainly incorrectly)
243	 * that whoever created the string knew what they were doing.
244	 *
245	 * !!!
246	 * Brute force "sort", but since we don't expect more than one or two
247	 * arguments in a string, the setup cost of a fast sort will be more
248	 * expensive than the loop.
249	 */
250	for (cnt1 = 1; cnt1 <= soff; ++cnt1)
251		for (cnt2 = 0; cnt2 < soff; ++cnt2)
252			if (cnt1 == str[cnt2].arg) {
253				memmove(s_rbp, str[cnt2].str, str[cnt2].prefix);
254				memmove(s_rbp + str[cnt2].prefix,
255				    str[cnt2].str + str[cnt2].prefix +
256				    str[cnt2].skip, str[cnt2].suffix);
257				s_rbp += str[cnt2].prefix + str[cnt2].suffix;
258				*s_rbp++ =
259				    gp == NULL ? DEFAULT_NOPRINT : gp->noprint;
260				break;
261			}
262	*s_rbp = '\0';
263	fmt = rbp;
264#endif
265
266#ifndef NL_ARGMAX
267format:	/* Format the arguments into the string. */
268#endif
269	va_start(ap, fmt);
270	len = vsnprintf(mp, REM, fmt, ap);
271	va_end(ap);
272	if (len >= nlen)
273		goto retry;
274
275#ifndef NL_ARGMAX
276	if (soff == 0)
277		goto nofmt;
278
279	/*
280	 * Go through the resulting string, and, for each separator character
281	 * separated string, enter its new starting position and length in the
282	 * array.
283	 */
284	for (p = t = mp, cnt1 = 1,
285	    ch = gp == NULL ? DEFAULT_NOPRINT : gp->noprint; *p != '\0'; ++p)
286		if (*p == ch) {
287			for (cnt2 = 0; cnt2 < soff; ++cnt2)
288				if (str[cnt2].arg == cnt1)
289					break;
290			str[cnt2].str = t;
291			str[cnt2].prefix = p - t;
292			t = p + 1;
293			++cnt1;
294		}
295
296	/*
297	 * Reorder the strings once again, putting them back into the
298	 * message buffer.
299	 *
300	 * !!!
301	 * Note, the length of the message gets decremented once for
302	 * each substring, when we discard the separator character.
303	 */
304	for (s_rbp = rbp, cnt1 = 0; cnt1 < soff; ++cnt1) {
305		memmove(rbp, str[cnt1].str, str[cnt1].prefix);
306		rbp += str[cnt1].prefix;
307		--len;
308	}
309	memmove(mp, s_rbp, rbp - s_rbp);
310
311	/* Free the reordered string memory. */
312	free(s_rbp);
313#endif
314
315nofmt:	mp += len;
316	if ((mlen += len) > blen)
317		goto retry;
318	if (mt == M_SYSERR) {
319		len = snprintf(mp, REM, ": %s", strerror(errno));
320		mp += len;
321		if ((mlen += len) > blen)
322			goto retry;
323		mt = M_ERR;
324	}
325
326	/* Add trailing newline. */
327	if ((mlen += 1) > blen)
328		goto retry;
329	*mp = '\n';
330
331	if (sp != NULL)
332		(void)ex_fflush(sp);
333	if (gp != NULL)
334		gp->scr_msg(sp, mt, bp, mlen);
335	else
336		(void)fprintf(stderr, "%.*s", (int)mlen, bp);
337
338	/* Cleanup. */
339#ifndef NL_ARGMAX
340ret:
341#endif
342	FREE_SPACE(sp, bp, blen);
343alloc_err:
344	reenter = 0;
345}
346
347/*
348 * msgq_wstr --
349 *	Display a message with an embedded string.
350 *
351 * PUBLIC: void msgq_wstr(SCR *, mtype_t, const CHAR_T *, const char *);
352 */
353void
354msgq_wstr(SCR *sp, mtype_t mtype, const CHAR_T *str, const char *fmt)
355{
356	size_t nlen;
357	CONST char *nstr;
358
359	if (str == NULL) {
360		msgq(sp, mtype, "%s", fmt);
361		return;
362	}
363	INT2CHAR(sp, str, STRLEN(str) + 1, nstr, nlen);
364	msgq_str(sp, mtype, nstr, fmt);
365}
366
367/*
368 * msgq_str --
369 *	Display a message with an embedded string.
370 *
371 * PUBLIC: void msgq_str(SCR *, mtype_t, const char *, const char *);
372 */
373void
374msgq_str(SCR *sp, mtype_t mtype, const char *str, const char *fmt)
375{
376	int nf, sv_errno;
377	char *p;
378
379	if (str == NULL) {
380		msgq(sp, mtype, "%s", fmt);
381		return;
382	}
383
384	sv_errno = errno;
385	p = msg_print(sp, str, &nf);
386	errno = sv_errno;
387	msgq(sp, mtype, fmt, p);
388	if (nf)
389		FREE_SPACE(sp, p, 0);
390}
391
392/*
393 * mod_rpt --
394 *	Report on the lines that changed.
395 *
396 * !!!
397 * Historic vi documentation (USD:15-8) claimed that "The editor will also
398 * always tell you when a change you make affects text which you cannot see."
399 * This wasn't true -- edit a large file and do "100d|1".  We don't implement
400 * this semantic since it requires tracking each line that changes during a
401 * command instead of just keeping count.
402 *
403 * Line counts weren't right in historic vi, either.  For example, given the
404 * file:
405 *	abc
406 *	def
407 * the command 2d}, from the 'b' would report that two lines were deleted,
408 * not one.
409 *
410 * PUBLIC: void mod_rpt(SCR *);
411 */
412void
413mod_rpt(SCR *sp)
414{
415	static char * const action[] = {
416		"293|added",
417		"294|changed",
418		"295|deleted",
419		"296|joined",
420		"297|moved",
421		"298|shifted",
422		"299|yanked",
423	};
424	static char * const lines[] = {
425		"300|line",
426		"301|lines",
427	};
428	recno_t total;
429	u_long rptval;
430	int first, cnt;
431	size_t blen, len, tlen;
432	const char *t;
433	char * const *ap;
434	char *bp, *p;
435
436	/* Change reports are turned off in batch mode. */
437	if (F_ISSET(sp, SC_EX_SILENT))
438		return;
439
440	/* Reset changing line number. */
441	sp->rptlchange = OOBLNO;
442
443	/*
444	 * Don't build a message if not enough changed.
445	 *
446	 * !!!
447	 * And now, a vi clone test.  Historically, vi reported if the number
448	 * of changed lines was > than the value, not >=, unless it was a yank
449	 * command, which used >=.  No lie.  Furthermore, an action was never
450	 * reported for a single line action.  This is consistent for actions
451	 * other than yank, but yank didn't report single line actions even if
452	 * the report edit option was set to 1.  In addition, setting report to
453	 * 0 in the 4BSD historic vi was equivalent to setting it to 1, for an
454	 * unknown reason (this bug was fixed in System III/V at some point).
455	 * I got complaints, so nvi conforms to System III/V historic practice
456	 * except that we report a yank of 1 line if report is set to 1.
457	 */
458#define	ARSIZE(a)	sizeof(a) / sizeof (*a)
459#define	MAXNUM		25
460	rptval = O_VAL(sp, O_REPORT);
461	for (cnt = 0, total = 0; cnt < ARSIZE(action); ++cnt)
462		total += sp->rptlines[cnt];
463	if (total == 0)
464		return;
465	if (total <= rptval && sp->rptlines[L_YANKED] < rptval) {
466		for (cnt = 0; cnt < ARSIZE(action); ++cnt)
467			sp->rptlines[cnt] = 0;
468		return;
469	}
470
471	/* Build and display the message. */
472	GET_SPACE_GOTOC(sp, bp, blen, sizeof(action) * MAXNUM + 1);
473	for (p = bp, first = 1, tlen = 0,
474	    ap = action, cnt = 0; cnt < ARSIZE(action); ++ap, ++cnt)
475		if (sp->rptlines[cnt] != 0) {
476			if (first)
477				first = 0;
478			else {
479				*p++ = ';';
480				*p++ = ' ';
481				tlen += 2;
482			}
483			len = snprintf(p, MAXNUM, "%lu ",
484			    (u_long)sp->rptlines[cnt]);
485			p += len;
486			tlen += len;
487			t = msg_cat(sp,
488			    lines[sp->rptlines[cnt] == 1 ? 0 : 1], &len);
489			memcpy(p, t, len);
490			p += len;
491			tlen += len;
492			*p++ = ' ';
493			++tlen;
494			t = msg_cat(sp, *ap, &len);
495			memcpy(p, t, len);
496			p += len;
497			tlen += len;
498			sp->rptlines[cnt] = 0;
499		}
500
501	/* Add trailing newline. */
502	*p = '\n';
503	++tlen;
504
505	(void)ex_fflush(sp);
506	sp->gp->scr_msg(sp, M_INFO, bp, tlen);
507
508	FREE_SPACE(sp, bp, blen);
509alloc_err:
510	return;
511
512#undef ARSIZE
513#undef MAXNUM
514}
515
516/*
517 * msgq_status --
518 *	Report on the file's status.
519 *
520 * PUBLIC: void msgq_status(SCR *, recno_t, u_int);
521 */
522void
523msgq_status(SCR *sp, recno_t lno, u_int flags)
524{
525	recno_t last;
526	size_t blen, len;
527	int cnt, needsep;
528	const char *t;
529	char **ap, *bp, *np, *p, *s, *ep;
530	CHAR_T *wp;
531	size_t wlen;
532
533	/* Get sufficient memory. */
534	len = strlen(sp->frp->name);
535	GET_SPACE_GOTOC(sp, bp, blen, len * MAX_CHARACTER_COLUMNS + 128);
536	p = bp;
537	ep = bp + blen;
538
539	/* Convert the filename. */
540	CHAR2INT(sp, sp->frp->name, len + 1, wp, wlen);
541
542	/* Copy in the filename. */
543	for (; *wp != '\0'; ++wp) {
544		len = KEY_LEN(sp, *wp);
545		memcpy(p, KEY_NAME(sp, *wp), len);
546		p += len;
547	}
548	np = p;
549	*p++ = ':';
550	*p++ = ' ';
551
552	/* Copy in the argument count. */
553	if (F_ISSET(sp, SC_STATUS_CNT) && sp->argv != NULL) {
554		for (cnt = 0, ap = sp->argv; *ap != NULL; ++ap, ++cnt);
555		if (cnt > 1) {
556			(void)snprintf(p, ep - p,
557			    msg_cat(sp, "317|%d files to edit", NULL), cnt);
558			p += strlen(p);
559			*p++ = ':';
560			*p++ = ' ';
561		}
562		F_CLR(sp, SC_STATUS_CNT);
563	}
564
565	/*
566	 * See nvi/exf.c:file_init() for a description of how and when the
567	 * read-only bit is set.
568	 *
569	 * !!!
570	 * The historic display for "name changed" was "[Not edited]".
571	 */
572	needsep = 0;
573	if (F_ISSET(sp->frp, FR_NEWFILE)) {
574		F_CLR(sp->frp, FR_NEWFILE);
575		t = msg_cat(sp, "021|new file", &len);
576		memcpy(p, t, len);
577		p += len;
578		needsep = 1;
579	} else {
580		if (F_ISSET(sp->frp, FR_NAMECHANGE)) {
581			t = msg_cat(sp, "022|name changed", &len);
582			memcpy(p, t, len);
583			p += len;
584			needsep = 1;
585		}
586		if (needsep) {
587			*p++ = ',';
588			*p++ = ' ';
589		}
590		if (F_ISSET(sp->ep, F_MODIFIED))
591			t = msg_cat(sp, "023|modified", &len);
592		else
593			t = msg_cat(sp, "024|unmodified", &len);
594		memcpy(p, t, len);
595		p += len;
596		needsep = 1;
597	}
598	if (F_ISSET(sp->frp, FR_UNLOCKED)) {
599		if (needsep) {
600			*p++ = ',';
601			*p++ = ' ';
602		}
603		t = msg_cat(sp, "025|UNLOCKED", &len);
604		memcpy(p, t, len);
605		p += len;
606		needsep = 1;
607	}
608	if (O_ISSET(sp, O_READONLY)) {
609		if (needsep) {
610			*p++ = ',';
611			*p++ = ' ';
612		}
613		t = msg_cat(sp, "026|readonly", &len);
614		memcpy(p, t, len);
615		p += len;
616		needsep = 1;
617	}
618	if (needsep) {
619		*p++ = ':';
620		*p++ = ' ';
621	}
622	if (LF_ISSET(MSTAT_SHOWLAST)) {
623		if (db_last(sp, &last))
624			return;
625		if (last == 0) {
626			t = msg_cat(sp, "028|empty file", &len);
627			memcpy(p, t, len);
628			p += len;
629		} else {
630			t = msg_cat(sp, "027|line %lu of %lu [%ld%%]", &len);
631			(void)snprintf(p, ep - p, t, (u_long)lno, (u_long)last,
632			    ((u_long)lno * 100) / last);
633			p += strlen(p);
634		}
635	} else {
636		t = msg_cat(sp, "029|line %lu", &len);
637		(void)snprintf(p, ep - p, t, (u_long)lno);
638		p += strlen(p);
639	}
640#ifdef DEBUG
641	(void)snprintf(p, ep - p, " (pid %lu)", (u_long)getpid());
642	p += strlen(p);
643#endif
644	*p++ = '\n';
645	len = p - bp;
646
647	/*
648	 * There's a nasty problem with long path names.  Cscope and tags files
649	 * can result in long paths and vi will request a continuation key from
650	 * the user as soon as it starts the screen.  Unfortunately, the user
651	 * has already typed ahead, and chaos results.  If we assume that the
652	 * characters in the filenames and informational messages only take a
653	 * single screen column each, we can trim the filename.
654	 *
655	 * XXX
656	 * Status lines get put up at fairly awkward times.  For example, when
657	 * you do a filter read (e.g., :read ! echo foo) in the top screen of a
658	 * split screen, we have to repaint the status lines for all the screens
659	 * below the top screen.  We don't want users having to enter continue
660	 * characters for those screens.  Make it really hard to screw this up.
661	 */
662	s = bp;
663	if (LF_ISSET(MSTAT_TRUNCATE) && len > sp->cols) {
664		for (; s < np && (*s != '/' || (p - s) > sp->cols - 3); ++s);
665		if (s == np) {
666			s = p - (sp->cols - 5);
667			*--s = ' ';
668		}
669		*--s = '.';
670		*--s = '.';
671		*--s = '.';
672		len = p - s;
673	}
674
675	/* Flush any waiting ex messages. */
676	(void)ex_fflush(sp);
677
678	sp->gp->scr_msg(sp, M_INFO, s, len);
679
680	FREE_SPACE(sp, bp, blen);
681alloc_err:
682	return;
683}
684
685/*
686 * msg_open --
687 *	Open the message catalogs.
688 *
689 * PUBLIC: int msg_open(SCR *, char *);
690 */
691int
692msg_open(SCR *sp, char *file)
693{
694	/*
695	 * !!!
696	 * Assume that the first file opened is the system default, and that
697	 * all subsequent ones user defined.  Only display error messages
698	 * if we can't open the user defined ones -- it's useful to know if
699	 * the system one wasn't there, but if nvi is being shipped with an
700	 * installed system, the file will be there, if it's not, then the
701	 * message will be repeated every time nvi is started up.
702	 */
703	static int first = 1;
704	nl_catd catd;
705	char *p;
706	int rval = 0;
707
708	if ((p = strrchr(file, '/')) != NULL && p[1] == '\0') {
709		/* Confirms to XPG4. */
710		if ((p = join(file, setlocale(LC_MESSAGES, NULL))) == NULL) {
711			msgq(sp, M_SYSERR, NULL);
712			return (1);
713		}
714	} else {
715		/* Make sure it's recognized as a path by catopen(3). */
716		if ((p = join(".", file)) == NULL) {
717			msgq(sp, M_SYSERR, NULL);
718			return (1);
719		}
720	}
721	errno = 0;
722	if ((catd = catopen(p, NL_CAT_LOCALE)) == (nl_catd)-1) {
723		if (first) {
724			first = 0;
725			rval = 1;
726			goto ret;
727		}
728
729		/*
730		 * POSIX.1-2008 gives no instruction on how to report a
731		 * corrupt catalog file.  Errno == 0 is not rare; add
732		 * EFTYPE, which is seen on FreeBSD, for a good measure.
733		 */
734#ifdef EFTYPE
735		if (errno == 0 || errno == EFTYPE)
736#else
737		if (errno == 0)
738#endif
739			msgq_str(sp, M_ERR, p,
740			    "030|The file %s is not a message catalog");
741		else
742			msgq_str(sp, M_SYSERR, p, "%s");
743		rval = 1;
744		goto ret;
745	}
746	first = 0;
747
748	msg_close(sp->gp);
749	sp->gp->catd = catd;
750ret:	free(p);
751	return (rval);
752}
753
754/*
755 * msg_close --
756 *	Close the message catalogs.
757 *
758 * PUBLIC: void msg_close(GS *);
759 */
760void
761msg_close(GS *gp)
762{
763	if (gp->catd != (nl_catd)-1)
764		(void)catclose(gp->catd);
765}
766
767/*
768 * msg_cont --
769 *	Return common continuation messages.
770 *
771 * PUBLIC: const char *msg_cmsg(SCR *, cmsg_t, size_t *);
772 */
773const char *
774msg_cmsg(SCR *sp, cmsg_t which, size_t *lenp)
775{
776	switch (which) {
777	case CMSG_CONF:
778		return (msg_cat(sp, "268|confirm? [ynq]", lenp));
779	case CMSG_CONT:
780		return (msg_cat(sp, "269|Press any key to continue: ", lenp));
781	case CMSG_CONT_EX:
782		return (msg_cat(sp,
783	    "270|Press any key to continue [: to enter more ex commands]: ",
784		    lenp));
785	case CMSG_CONT_R:
786		return (msg_cat(sp, "161|Press Enter to continue: ", lenp));
787	case CMSG_CONT_S:
788		return (msg_cat(sp, "275| cont?", lenp));
789	case CMSG_CONT_Q:
790		return (msg_cat(sp,
791		    "271|Press any key to continue [q to quit]: ", lenp));
792	default:
793		abort();
794	}
795	/* NOTREACHED */
796}
797
798/*
799 * msg_cat --
800 *	Return a single message from the catalog, plus its length.
801 *
802 * !!!
803 * Only a single catalog message can be accessed at a time, if multiple
804 * ones are needed, they must be copied into local memory.
805 *
806 * PUBLIC: const char *msg_cat(SCR *, const char *, size_t *);
807 */
808const char *
809msg_cat(SCR *sp, const char *str, size_t *lenp)
810{
811	GS *gp;
812	char *p;
813	int msgno;
814
815	/*
816	 * If it's not a catalog message, i.e. has doesn't have a leading
817	 * number and '|' symbol, we're done.
818	 */
819	if (isdigit((u_char)str[0]) &&
820	    isdigit((u_char)str[1]) &&
821	    isdigit((u_char)str[2]) && str[3] == '|') {
822		msgno = atoi(str);
823		str = &str[4];
824
825		gp = sp == NULL ? NULL : sp->gp;
826		if (gp != NULL && gp->catd != (nl_catd)-1 &&
827		    (p = catgets(gp->catd, 1, msgno, str)) != NULL) {
828			if (lenp != NULL)
829				*lenp = strlen(p);
830			return (p);
831		}
832	}
833	if (lenp != NULL)
834		*lenp = strlen(str);
835	return (str);
836}
837
838/*
839 * msg_print --
840 *	Return a printable version of a string, in allocated memory.
841 *
842 * PUBLIC: char *msg_print(SCR *, const char *, int *);
843 */
844char *
845msg_print(SCR *sp, const char *s, int *needfree)
846{
847	size_t blen, nlen;
848	char *bp, *ep, *p, *t;
849	CHAR_T *wp, *cp;
850	size_t wlen;
851
852	*needfree = 0;
853
854	/* XXX Not good for debugging ex_read & ex_filter.*/
855	CHAR2INT5(sp, EXP(sp)->ibcw, (char *)s, strlen(s) + 1, wp, wlen);
856	for (cp = wp; *cp != '\0'; ++cp)
857		if (!ISPRINT(*cp))
858			break;
859	if (*cp == '\0')
860		return ((char *)s);	/* SAFE: needfree set to 0. */
861
862	nlen = 0;
863	if (0) {
864retry:		if (sp == NULL)
865			free(bp);
866		else
867			FREE_SPACE(sp, bp, blen);
868		*needfree = 0;
869	}
870	nlen += 256;
871	if (sp == NULL) {
872		if ((bp = malloc(nlen)) == NULL)
873			goto alloc_err;
874	} else
875		GET_SPACE_GOTOC(sp, bp, blen, nlen);
876	if (0) {
877alloc_err:	return ("");
878	}
879	*needfree = 1;
880
881	for (p = bp, ep = (bp + blen) - 1; *wp != '\0' && p < ep; ++wp)
882		for (t = KEY_NAME(sp, *wp); *t != '\0' && p < ep; *p++ = *t++);
883	if (p == ep)
884		goto retry;
885	*p = '\0';
886	return (bp);
887}
888