BSD 4_3 development

[unix-history] / usr / contrib / rn / cheat.c

/* $Header: cheat.c,v 4.3 85/05/01 11:36:46 lwall Exp $
*
* $Log:        cheat.c,v $
* Revision 4.3  85/05/01  11:36:46  lwall
* Baseline for release with 4.3bsd.
* 
*/

#include "EXTERN.h"
#include "common.h"
#include "intrp.h"
#include "search.h"
#include "ng.h"
#include "bits.h"
#include "artio.h"
#include "term.h"
#include "artsrch.h"
#include "head.h"
#include "INTERN.h"
#include "cheat.h"

/* see what we can do while they are reading */

#ifdef PENDING
#   ifdef ARTSEARCH
       COMPEX srchcompex;              /* compiled regex for searchahead */
#   endif
#endif

void
cheat_init()
{
   ;
}

#ifdef PENDING
void
look_ahead()
{
#ifdef ARTSEARCH
   register char *h, *s;

#ifdef DEBUGGING
   if (debug && srchahead) {
       printf("(%ld)",(long)srchahead);
       fflush(stdout);
   }
#endif
   if (srchahead && srchahead < art) { /* in ^N mode? */
       char *pattern;

       pattern = buf+1;
       strcpy(pattern,": *");
       h = pattern + strlen(pattern);
       interp(h,(sizeof buf) - (h-buf),"%s");
       h[24] = '\0';           /* compensate for notesfiles */
       while (*h) {
           if (index("\\[.^*$'\"",*h) != Nullch)
               *h++ = '.';
           else
               h++;
       }
#ifdef DEBUGGING
       if (debug & DEB_SEARCH_AHEAD) {
           fputs("(hit CR)",stdout);
           fflush(stdout);
           gets(buf+128);
           printf("\npattern = %s\n",pattern);
       }
#endif
       if ((s = compile(&srchcompex,pattern,TRUE,TRUE)) != Nullch) {
                                   /* compile regular expression */
           printf("\n%s\n",s);
           srchahead = 0;
       }
       if (srchahead) {
           srchahead = art;
           for (;;) {
               srchahead++;    /* go forward one article */
               if (srchahead > lastart) { /* out of articles? */
#ifdef DEBUGGING
                   if (debug)
                       fputs("(not found)",stdout);
#endif
                   break;
               }
               if (!was_read(srchahead) &&
                   wanted(&srchcompex,srchahead,0)) {
                                   /* does the shoe fit? */
#ifdef DEBUGGING
                   if (debug)
                       printf("(%ld)",(long)srchahead);
#endif
                   artopen(srchahead);
                   break;
               }
               if (input_pending())
                   break;
           }
           fflush(stdout);
       }
   }
   else
#endif
   {
       if (art+1 <= lastart)/* how about a pre-fetch? */
           artopen(art+1);     /* look for the next article */
   }
}
#endif

/* see what else we can do while they are reading */

void
collect_subjects()
{
#ifdef PENDING
# ifdef CACHESUBJ
   ART_NUM oldart = openart;
   ART_POS oldartpos;

   if (!in_ng || !srchahead)
       return;
   if (oldart)                 /* remember where we were in art */
       oldartpos = ftell(artfp);
   if (srchahead >= subj_to_get)
       subj_to_get = srchahead+1;
   while (!input_pending() && subj_to_get <= lastart)
       fetchsubj(subj_to_get++,FALSE,FALSE);
   if (oldart) {
       artopen(oldart);
       fseek(artfp,oldartpos,0);       /* do not screw the pager */
   }
# endif
#endif
}