Fixed gcc -Wall warnings

[unix-history] / usr / src / bin / csh / hist.c

/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)hist.c      5.11 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <stdlib.h>
#if __STDC__
# include <stdarg.h>
#else
# include <varargs.h>
#endif

#include "csh.h"
#include "extern.h"

static void     hfree __P((struct Hist *));
static void     dohist1 __P((struct Hist *, int *, int, int));
static void     phist __P((struct Hist *, int));

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) != NULL;)
       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));
   np->Hnum = np->Href = event;
   if (docopy) {
       copylex(&np->Hlex, lp);
   }
   else {
       np->Hlex.next = lp->next;
       lp->next->prev = &np->Hlex;
       np->Hlex.prev = lp->prev;
       lp->prev->next = &np->Hlex;
   }
   np->Hnext = Histlist.Hnext;
   Histlist.Hnext = np;
   return (np);
}

static void
hfree(hp)
   register struct Hist *hp;
{

   freelex(&hp->Hlex);
   xfree((ptr_t) hp);
}

void
/*ARGSUSED*/
dohist(v, t)
   Char **v;
   struct command *t;
{
   int     n, rflg = 0, hflg = 0;

   if (getn(value(STRhistory)) == 0)
       return;
   if (setintr)
       (void) sigsetmask(sigblock((sigset_t) 0) & ~sigmask(SIGINT));
   while (*++v && **v == '-') {
       Char   *vp = *v;

       while (*++vp)
           switch (*vp) {
           case 'h':
               hflg++;
               break;
           case 'r':
               rflg++;
               break;
           case '-':           /* ignore multiple '-'s */
               break;
           default:
               stderror(ERR_HISTUS);
               break;
           }
   }
   if (*v)
       n = getn(*v);
   else {
       n = getn(value(STRhistory));
   }
   dohist1(Histlist.Hnext, &n, rflg, hflg);
}

static void
dohist1(hp, np, rflg, hflg)
   struct Hist *hp;
   int    *np, rflg, hflg;
{
   bool    print = (*np) > 0;

   for (; hp != 0; hp = hp->Hnext) {
       (*np)--;
       hp->Href++;
       if (rflg == 0) {
           dohist1(hp->Hnext, np, rflg, hflg);
           if (print)
               phist(hp, hflg);
           return;
       }
       if (*np >= 0)
           phist(hp, hflg);
   }
}

static void
phist(hp, hflg)
   register struct Hist *hp;
   int     hflg;
{
   if (hflg == 0)
       (void) fprintf(cshout, "%6d\t", hp->Hnum);
   prlex(cshout, &hp->Hlex);
}