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- /* $Header: /home/hyperion/mu/christos/src/sys/tcsh-6.01/RCS/sh.hist.c,v 3.2 1991/10/12 04:23:51 christos Exp $ */
- /*
- * sh.hist.c: Shell history expansions and substitutions
- */
- /*-
- * Copyright (c) 1980, 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include "sh.h"
-
- RCSID("$Id: sh.hist.c,v 3.2 1991/10/12 04:23:51 christos Exp $")
-
- #include "tc.h"
-
- extern bool histvalid;
- extern Char histline[];
- static Char HistLit = 0;
-
- static void hfree __P((struct Hist *));
- static void dohist1 __P((struct Hist *, int *, int, int, int));
- static void phist __P((struct Hist *, int, int));
-
- /*
- * C shell
- */
-
- void
- savehist(sp)
- struct wordent *sp;
- {
- register struct Hist *hp, *np;
- register int histlen = 0;
- Char *cp;
-
- /* throw away null lines */
- if (sp->next->word[0] == '\n')
- return;
- cp = value(STRhistory);
- if (*cp) {
- register Char *p = cp;
-
- while (*p) {
- if (!Isdigit(*p)) {
- histlen = 0;
- break;
- }
- histlen = histlen * 10 + *p++ - '0';
- }
- }
- for (hp = &Histlist; np = hp->Hnext;)
- if (eventno - np->Href >= histlen || histlen == 0)
- hp->Hnext = np->Hnext, hfree(np);
- else
- hp = np;
- (void) enthist(++eventno, sp, 1);
- }
-
- struct Hist *
- enthist(event, lp, docopy)
- int event;
- register struct wordent *lp;
- bool docopy;
- {
- register struct Hist *np;
-
- np = (struct Hist *) xmalloc((size_t) sizeof(*np));
- (void) time(&(np->Htime));
- np->Hnum = np->Href = event;
- if (docopy) {
- copylex(&np->Hlex, lp);
- if (histvalid)
- np->histline = Strsave(histline);
- else
- np->histline = NULL;
- }
- else {
- np->Hlex.next = lp->next;
- lp->next->prev = &np->Hlex;
- np->Hlex.prev = lp->prev;
- lp->prev->next = &np->Hlex;
- np->histline = NULL;
- }
- np->Hnext = Histlist.Hnext;
- Histlist.Hnext = np;
- return (np);
- }
-
- static void
- hfree(hp)
- register struct Hist *hp;
- {
-
- freelex(&hp->Hlex);
- if (hp->histline)
- xfree((ptr_t) hp->histline);
- xfree((ptr_t) hp);
- }
-
- /*ARGSUSED*/
- void
- dohist(vp, c)
- Char **vp;
- struct command *c;
- {
- int n, rflg = 0, hflg = 0, tflg = 0;
-
- if (getn(value(STRhistory)) == 0)
- return;
- if (setintr)
- #ifdef BSDSIGS
- (void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
- #else
- (void) sigrelse(SIGINT);
- #endif
- while (*++vp && **vp == '-') {
- Char *vp2 = *vp;
-
- while (*++vp2)
- switch (*vp2) {
- case 'h':
- hflg++;
- break;
- case 'r':
- rflg++;
- break;
- case 't':
- tflg++;
- break;
- case '-': /* ignore multiple '-'s */
- break;
- default:
- stderror(ERR_HISTUS);
- break;
- }
- }
- if (*vp)
- n = getn(*vp);
- else {
- n = getn(value(STRhistory));
- }
- dohist1(Histlist.Hnext, &n, rflg, hflg, tflg);
- }
-
- static void
- dohist1(hp, np, rflg, hflg, tflg)
- struct Hist *hp;
- int *np, rflg, hflg, tflg;
- {
- bool print = (*np) > 0;
-
- for (; hp != 0; hp = hp->Hnext) {
- (*np)--;
- hp->Href++;
- if (rflg == 0) {
- dohist1(hp->Hnext, np, rflg, hflg, tflg);
- if (print)
- phist(hp, hflg, tflg);
- return;
- }
- if (*np >= 0)
- phist(hp, hflg, tflg);
- }
- }
-
- static void
- phist(hp, hflg, tflg)
- register struct Hist *hp;
- int hflg, tflg;
- {
- struct tm *t;
- char ampm = 'a';
-
- if (hflg == 0) {
- xprintf("%6d\t", hp->Hnum);
- if (tflg == 0) {
- t = localtime(&hp->Htime);
- if (adrof(STRampm)) { /* addition by Hans J. Albertsson */
- if (t->tm_hour >= 12) {
- if (t->tm_hour > 12)
- t->tm_hour -= 12;
- ampm = 'p';
- }
- else if (t->tm_hour == 0)
- t->tm_hour = 12;
- xprintf("%2d:%02d%cm\t", t->tm_hour, t->tm_min, ampm);
- }
- else {
- xprintf("%2d:%02d\t", t->tm_hour, t->tm_min);
- }
- }
- }
- if (HistLit && hp->histline)
- xprintf("%s\n", short2str(hp->histline));
- else
- prlex(&hp->Hlex);
- }
-