usr/othersrc/games/larn/help.c

/*      help.c          Larn is copyrighted 1986 by Noah Morgan. */
#include "header.h"
/*
 *      help function to display the help info
 *
 *      format of the .larn.help file
 *
 *      1st character of file:  # of pages of help available (ascii digit)
 *      page (23 lines) for the introductory message (not counted in above)
 *      pages of help text (23 lines per page)
 */
extern char helpfile[];
help()
        {
        register int i,j;
#ifndef VT100
        char tmbuf[128];        /* intermediate translation buffer when not a VT100 */
#endif VT100
        if ((j=openhelp()) < 0)  return;        /* open the help file and get # pages */
        for (i=0; i<23; i++) lgetl();   /* skip over intro message */
        for (;  j>0; j--)
                {
                clear();
                for (i=0; i<23; i++)
#ifdef VT100
                        lprcat(lgetl());        /* print out each line that we read in */
#else VT100
                        { tmcapcnv(tmbuf,lgetl());  lprcat(tmbuf); } /* intercept \33's */
#endif VT100
                if (j>1)
                        {
                        lprcat("    ---- Press ");  standout("return");
                        lprcat(" to exit, ");  standout("space");
                        lprcat(" for more help ---- ");
                        i=0; while ((i!=' ') && (i!='\n') && (i!='\33')) i=getchar();
                        if ((i=='\n') || (i=='\33'))
                                {
                                lrclose();  setscroll();  drawscreen();  return;
                                }
                        }
                }
        lrclose();  retcont();  drawscreen();
        }

/*
 *      function to display the welcome message and background
 */
welcome()
        {
        register int i;
#ifndef VT100
        char tmbuf[128];        /* intermediate translation buffer when not a VT100 */
#endif VT100
        if (openhelp() < 0)  return;    /* open the help file */
        clear();
        for(i=0; i<23; i++)
#ifdef VT100
                        lprcat(lgetl());        /* print out each line that we read in */
#else VT100
                        { tmcapcnv(tmbuf,lgetl());  lprcat(tmbuf); } /* intercept \33's */
#endif VT100
        lrclose();  retcont();  /* press return to continue */
        }

/*
 *      function to say press return to continue and reset scroll when done
 */
retcont()
        {
        cursor(1,24); lprcat("Press "); standout("return");
        lprcat(" to continue: ");   while (getchar() != '\n');
        setscroll();
        }

/*
 *      routine to open the help file and return the first character - '0'
 */
openhelp()
        {
        if (lopen(helpfile)<0)
                {
                lprintf("Can't open help file \"%s\" ",helpfile);
                lflush(); sleep(4);     drawscreen();   setscroll(); return(-1);
                }
        resetscroll();  return(lgetc() - '0');
        }