Usenet 1994 October/usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso/misc/volume1/8711/microemacs-3.9/13

Text File | 1987-11-20 | 38KB | 1,491 lines

Article 90 of comp.sources.misc:
Path: tut!osu-cis!cbosgd!mandrill!hal!ncoast!allbery
From: [e-mail] (Daniel Lawrence)
Newsgroups: comp.sources.misc
Subject: MicroEmacs 3.9 (Part 13 of 16)
Message-ID: <[e-mail]>
Date: 17 Nov 87 02:35:24 GMT
Sender: [e-mail]
Lines: 1476
Approved: [e-mail]
X-Archive: comp.sources.misc/microemacs-3.9/12

# This is a shar archive.
# Remove everything above this line.
# Run the file through sh, not csh.
# (type `sh mes.13')
# If you do not see the message
#    `mes.13 completed!'
# then the file was incomplete.
echo extracting - vt52.c
sed 's/^X//' > vt52.c << 'FRIDAY_NIGHT'
X/*
X * The routines in this file
X * provide support for VT52 style terminals
X * over a serial line. The serial I/O services are
X * provided by routines in "termio.c". It compiles
X * into nothing if not a VT52 style device. The
X * bell on the VT52 is terrible, so the "beep"
X * routine is conditionalized on defining BEL.
X */
X#define    termdef    1            /* don't define "term" external */
X
X#include        <stdio.h>
X#include        "estruct.h"
X#include    "edef.h"
X
X#if     VT52
X
X#define NROW    24                      /* Screen size.                 */
X#define NCOL    80                      /* Edit if you want to.         */
X#define    MARGIN    8            /* size of minimim margin and    */
X#define    SCRSIZ    64            /* scroll size for extended lines */
X#define    NPAUSE    100            /* # times thru update to pause */
X#define BIAS    0x20                    /* Origin 0 coordinate bias.    */
X#define ESC     0x1B                    /* ESC character.               */
X#define BEL     0x07                    /* ascii bell character         */
X
Xextern  int     ttopen();               /* Forward references.          */
Xextern  int     ttgetc();
Xextern  int     ttputc();
Xextern  int     ttflush();
Xextern  int     ttclose();
Xextern  int     vt52move();
Xextern  int     vt52eeol();
Xextern  int     vt52eeop();
Xextern  int     vt52beep();
Xextern  int     vt52open();
Xextern    int    vt52rev();
Xextern    int    vt52cres();
Xextern    int    vt52kopen();
Xextern    int    vt52kclose();
X
X#if    COLOR
Xextern    int    vt52fcol();
Xextern    int    vt52bcol();
X#endif
X
X/*
X * Dispatch table. All the
X * hard fields just point into the
X * terminal I/O code.
X */
XTERM    term    = {
X    NROW-1,
X        NROW-1,
X        NCOL,
X        NCOL,
X    MARGIN,
X    SCRSIZ,
X    NPAUSE,
X        &vt52open,
X        &ttclose,
X    &vt52kopen,
X    &vt52kclose,
X        &ttgetc,
X        &ttputc,
X        &ttflush,
X        &vt52move,
X        &vt52eeol,
X        &vt52eeop,
X        &vt52beep,
X        &vt52rev,
X        &vt52cres
X#if    COLOR
X    , &vt52fcol,
X    &vt52bcol
X#endif
X};
X
Xvt52move(row, col)
X{
X        ttputc(ESC);
X        ttputc('Y');
X        ttputc(row+BIAS);
X        ttputc(col+BIAS);
X}
X
Xvt52eeol()
X{
X        ttputc(ESC);
X        ttputc('K');
X}
X
Xvt52eeop()
X{
X        ttputc(ESC);
X        ttputc('J');
X}
X
Xvt52rev(status)    /* set the reverse video state */
X
Xint status;    /* TRUE = reverse video, FALSE = normal video */
X
X{
X    /* can't do this here, so we won't */
X}
X
Xvt52cres()    /* change screen resolution - (not here though) */
X
X{
X    return(TRUE);
X}
X
Xspal()        /* change palette string */
X
X{
X    /*    Does nothing here    */
X}
X
X#if    COLOR
Xvt52fcol()    /* set the forground color [NOT IMPLIMENTED] */
X{
X}
X
Xvt52bcol()    /* set the background color [NOT IMPLIMENTED] */
X{
X}
X#endif
X
Xvt52beep()
X{
X#ifdef  BEL
X        ttputc(BEL);
X        ttflush();
X#endif
X}
X
Xvt52open()
X{
X#if     V7 | BSD
X        register char *cp;
X        char *getenv();
X
X        if ((cp = getenv("TERM")) == NULL) {
X                puts("Shell variable TERM not defined!");
X                exit(1);
X        }
X        if (strcmp(cp, "vt52") != 0 && strcmp(cp, "z19") != 0) {
X                puts("Terminal type not 'vt52'or 'z19' !");
X                exit(1);
X        }
X#endif
X        ttopen();
X}
X
Xvt52kopen()
X
X{
X}
X
Xvt52kclose()
X
X{
X}
X
X
X#if    FLABEL
Xfnclabel(f, n)        /* label a function key */
X
Xint f,n;    /* default flag, numeric argument [unused] */
X
X{
X    /* on machines with no function keys...don't bother */
X    return(TRUE);
X}
X#endif
X#else
X
Xvt52hello()
X
X{
X}
X
X#endif
FRIDAY_NIGHT
echo extracting - window.c
sed 's/^X//' > window.c << 'FRIDAY_NIGHT'
X/*
X * Window management. Some of the functions are internal, and some are
X * attached to keys that the user actually types.
X */
X
X#include        <stdio.h>
X#include        "estruct.h"
X#include    "edef.h"
X
X#if    MEGAMAX & ST520
Xoverlay    "window"
X#endif
X
X/*
X * Reposition dot in the current window to line "n". If the argument is
X * positive, it is that line. If it is negative it is that line from the
X * bottom. If it is 0 the window is centered (this is what the standard
X * redisplay code does). With no argument it defaults to 0. Bound to M-!.
X */
Xreposition(f, n)
X    {
X    if (f == FALSE)    /* default to 0 to center screen */
X    n = 0;
X    curwp->w_force = n;
X    curwp->w_flag |= WFFORCE;
X    return (TRUE);
X    }
X
X/*
X * Refresh the screen. With no argument, it just does the refresh. With an
X * argument it recenters "." in the current window. Bound to "C-L".
X */
Xrefresh(f, n)
X    {
X    if (f == FALSE)
X        sgarbf = TRUE;
X    else
X        {
X        curwp->w_force = 0;             /* Center dot. */
X        curwp->w_flag |= WFFORCE;
X        }
X
X    return (TRUE);
X    }
X
X/*
X * The command make the next window (next => down the screen) the current
X * window. There are no real errors, although the command does nothing if
X * there is only 1 window on the screen. Bound to "C-X C-N".
X *
X * with an argument this command finds the <n>th window from the top
X *
X */
Xnextwind(f, n)
X
Xint f, n;    /* default flag and numeric argument */
X
X{
X    register WINDOW *wp;
X    register int nwindows;        /* total number of windows */
X
X    if (f) {
X
X        /* first count the # of windows */
X        wp = wheadp;
X        nwindows = 1;
X        while (wp->w_wndp != NULL) {
X            nwindows++;
X            wp = wp->w_wndp;
X        }
X
X        /* if the argument is negative, it is the nth window
X           from the bottom of the screen            */
X        if (n < 0)
X            n = nwindows + n + 1;
X
X        /* if an argument, give them that window from the top */
X        if (n > 0 && n <= nwindows) {
X            wp = wheadp;
X            while (--n)
X                wp = wp->w_wndp;
X        } else {
X            mlwrite("Window number out of range");
X            return(FALSE);
X        }
X    } else
X        if ((wp = curwp->w_wndp) == NULL)
X            wp = wheadp;
X    curwp = wp;
X    curbp = wp->w_bufp;
X    upmode();
X    return (TRUE);
X}
X
X/*
X * This command makes the previous window (previous => up the screen) the
X * current window. There arn't any errors, although the command does not do a
X * lot if there is 1 window.
X */
Xprevwind(f, n)
X{
X    register WINDOW *wp1;
X    register WINDOW *wp2;
X
X    /* if we have an argument, we mean the nth window from the bottom */
X    if (f)
X        return(nextwind(f, -n));
X
X    wp1 = wheadp;
X    wp2 = curwp;
X
X    if (wp1 == wp2)
X        wp2 = NULL;
X
X    while (wp1->w_wndp != wp2)
X        wp1 = wp1->w_wndp;
X
X    curwp = wp1;
X    curbp = wp1->w_bufp;
X    upmode();
X    return (TRUE);
X}
X
X/*
X * This command moves the current window down by "arg" lines. Recompute the
X * top line in the window. The move up and move down code is almost completely
X * the same; most of the work has to do with reframing the window, and picking
X * a new dot. We share the code by having "move down" just be an interface to
X * "move up". Magic. Bound to "C-X C-N".
X */
Xmvdnwind(f, n)
X
Xint n;
X
X{
X    return (mvupwind(f, -n));
X}
X
X/*
X * Move the current window up by "arg" lines. Recompute the new top line of
X * the window. Look to see if "." is still on the screen. If it is, you win.
X * If it isn't, then move "." to center it in the new framing of the window
X * (this command does not really move "."; it moves the frame). Bound to
X * "C-X C-P".
X */
Xmvupwind(f, n)
X    int n;
X
X    {
X    register LINE *lp;
X    register int i;
X
X    lp = curwp->w_linep;
X
X    if (n < 0)
X        {
X        while (n++ && lp!=curbp->b_linep)
X            lp = lforw(lp);
X        }
X    else
X        {
X        while (n-- && lback(lp)!=curbp->b_linep)
X            lp = lback(lp);
X        }
X
X    curwp->w_linep = lp;
X    curwp->w_flag |= WFHARD;            /* Mode line is OK. */
X
X    for (i = 0; i < curwp->w_ntrows; ++i)
X        {
X        if (lp == curwp->w_dotp)
X            return (TRUE);
X        if (lp == curbp->b_linep)
X            break;
X        lp = lforw(lp);
X        }
X
X    lp = curwp->w_linep;
X    i  = curwp->w_ntrows/2;
X
X    while (i-- && lp != curbp->b_linep)
X        lp = lforw(lp);
X
X    curwp->w_dotp  = lp;
X    curwp->w_doto  = 0;
X    return (TRUE);
X    }
X
X/*
X * This command makes the current window the only window on the screen. Bound
X * to "C-X 1". Try to set the framing so that "." does not have to move on the
X * display. Some care has to be taken to keep the values of dot and mark in
X * the buffer structures right if the distruction of a window makes a buffer
X * become undisplayed.
X */
Xonlywind(f, n)
X{
X        register WINDOW *wp;
X        register LINE   *lp;
X        register int    i;
X
X        while (wheadp != curwp) {
X                wp = wheadp;
X                wheadp = wp->w_wndp;
X                if (--wp->w_bufp->b_nwnd == 0) {
X                        wp->w_bufp->b_dotp  = wp->w_dotp;
X                        wp->w_bufp->b_doto  = wp->w_doto;
X                        wp->w_bufp->b_markp = wp->w_markp;
X                        wp->w_bufp->b_marko = wp->w_marko;
X                }
X                free((char *) wp);
X        }
X        while (curwp->w_wndp != NULL) {
X                wp = curwp->w_wndp;
X                curwp->w_wndp = wp->w_wndp;
X                if (--wp->w_bufp->b_nwnd == 0) {
X                        wp->w_bufp->b_dotp  = wp->w_dotp;
X                        wp->w_bufp->b_doto  = wp->w_doto;
X                        wp->w_bufp->b_markp = wp->w_markp;
X                        wp->w_bufp->b_marko = wp->w_marko;
X                }
X                free((char *) wp);
X        }
X        lp = curwp->w_linep;
X        i  = curwp->w_toprow;
X        while (i!=0 && lback(lp)!=curbp->b_linep) {
X                --i;
X                lp = lback(lp);
X        }
X        curwp->w_toprow = 0;
X        curwp->w_ntrows = term.t_nrow-1;
X        curwp->w_linep  = lp;
X        curwp->w_flag  |= WFMODE|WFHARD;
X        return (TRUE);
X}
X
X/*
X * Delete the current window, placing its space in the window above,
X * or, if it is the top window, the window below. Bound to C-X 0.
X */
X
Xdelwind(f,n)
X
Xint f, n;    /* arguments are ignored for this command */
X
X{
X    register WINDOW *wp;    /* window to recieve deleted space */
X    register WINDOW *lwp;    /* ptr window before curwp */
X    register int target;    /* target line to search for */
X
X    /* if there is only one window, don't delete it */
X    if (wheadp->w_wndp == NULL) {
X        mlwrite("Can not delete this window");
X        return(FALSE);
X    }
X
X    /* find window before curwp in linked list */
X    wp = wheadp;
X    lwp = NULL;
X    while (wp != NULL) {
X        if (wp == curwp)
X            break;
X        lwp = wp;
X        wp = wp->w_wndp;
X    }
X
X    /* find recieving window and give up our space */
X    wp = wheadp;
X    if (curwp->w_toprow == 0) {
X        /* find the next window down */
X        target = curwp->w_ntrows + 1;
X        while (wp != NULL) {
X            if (wp->w_toprow == target)
X                break;
X            wp = wp->w_wndp;
X        }
X        if (wp == NULL)
X            return(FALSE);
X        wp->w_toprow = 0;
X        wp->w_ntrows += target;
X    } else {
X        /* find the next window up */
X        target = curwp->w_toprow - 1;
X        while (wp != NULL) {
X            if ((wp->w_toprow + wp->w_ntrows) == target)
X                break;
X            wp = wp->w_wndp;
X        }
X        if (wp == NULL)
X            return(FALSE);
X        wp->w_ntrows += 1 + curwp->w_ntrows;
X    }
X
X    /* get rid of the current window */
X    if (--curwp->w_bufp->b_nwnd == 0) {
X        curwp->w_bufp->b_dotp = curwp->w_dotp;
X        curwp->w_bufp->b_doto = curwp->w_doto;
X        curwp->w_bufp->b_markp = curwp->w_markp;
X        curwp->w_bufp->b_marko = curwp->w_marko;
X    }
X    if (lwp == NULL)
X        wheadp = curwp->w_wndp;
X    else
X        lwp->w_wndp = curwp->w_wndp;
X    free((char *)curwp);
X    curwp = wp;
X    wp->w_flag |= WFHARD;
X    curbp = wp->w_bufp;
X    upmode();
X    return(TRUE);
X}
X
X/*
X
XSplit the current window.  A window smaller than 3 lines cannot be
Xsplit.  An argument of 1 forces the cursor into the upper window, an
Xargument of two forces the cursor to the lower window.  The only other
Xerror that is possible is a "malloc" failure allocating the structure
Xfor the new window.  Bound to "C-X 2".
X
X */
Xsplitwind(f, n)
X
Xint f, n;    /* default flag and numeric argument */
X
X{
X        register WINDOW *wp;
X        register LINE   *lp;
X        register int    ntru;
X        register int    ntrl;
X        register int    ntrd;
X        register WINDOW *wp1;
X        register WINDOW *wp2;
X    char *malloc();
X
X        if (curwp->w_ntrows < 3) {
X                mlwrite("Cannot split a %d line window", curwp->w_ntrows);
X                return (FALSE);
X        }
X        if ((wp = (WINDOW *) malloc(sizeof(WINDOW))) == NULL) {
X                mlwrite("[OUT OF MEMORY]");
X                return (FALSE);
X        }
X        ++curbp->b_nwnd;                        /* Displayed twice.     */
X        wp->w_bufp  = curbp;
X        wp->w_dotp  = curwp->w_dotp;
X        wp->w_doto  = curwp->w_doto;
X        wp->w_markp = curwp->w_markp;
X        wp->w_marko = curwp->w_marko;
X        wp->w_flag  = 0;
X        wp->w_force = 0;
X#if    COLOR
X    /* set the colors of the new window */
X    wp->w_fcolor = gfcolor;
X    wp->w_bcolor = gbcolor;
X#endif
X        ntru = (curwp->w_ntrows-1) / 2;         /* Upper size           */
X        ntrl = (curwp->w_ntrows-1) - ntru;      /* Lower size           */
X        lp = curwp->w_linep;
X        ntrd = 0;
X        while (lp != curwp->w_dotp) {
X                ++ntrd;
X                lp = lforw(lp);
X        }
X        lp = curwp->w_linep;
X        if (((f == FALSE) && (ntrd <= ntru)) || ((f == TRUE) && (n == 1))) {
X                /* Old is upper window. */
X                if (ntrd == ntru)               /* Hit mode line.       */
X                        lp = lforw(lp);
X                curwp->w_ntrows = ntru;
X                wp->w_wndp = curwp->w_wndp;
X                curwp->w_wndp = wp;
X                wp->w_toprow = curwp->w_toprow+ntru+1;
X                wp->w_ntrows = ntrl;
X        } else {                                /* Old is lower window  */
X                wp1 = NULL;
X                wp2 = wheadp;
X                while (wp2 != curwp) {
X                        wp1 = wp2;
X                        wp2 = wp2->w_wndp;
X                }
X                if (wp1 == NULL)
X                        wheadp = wp;
X                else
X                        wp1->w_wndp = wp;
X                wp->w_wndp   = curwp;
X                wp->w_toprow = curwp->w_toprow;
X                wp->w_ntrows = ntru;
X                ++ntru;                         /* Mode line.           */
X                curwp->w_toprow += ntru;
X                curwp->w_ntrows  = ntrl;
X                while (ntru--)
X                        lp = lforw(lp);
X        }
X        curwp->w_linep = lp;                    /* Adjust the top lines */
X        wp->w_linep = lp;                       /* if necessary.        */
X        curwp->w_flag |= WFMODE|WFHARD;
X        wp->w_flag |= WFMODE|WFHARD;
X        return (TRUE);
X}
X
X/*
X * Enlarge the current window. Find the window that loses space. Make sure it
X * is big enough. If so, hack the window descriptions, and ask redisplay to do
X * all the hard work. You don't just set "force reframe" because dot would
X * move. Bound to "C-X Z".
X */
Xenlargewind(f, n)
X{
X        register WINDOW *adjwp;
X        register LINE   *lp;
X        register int    i;
X
X        if (n < 0)
X                return (shrinkwind(f, -n));
X        if (wheadp->w_wndp == NULL) {
X                mlwrite("Only one window");
X                return (FALSE);
X        }
X        if ((adjwp=curwp->w_wndp) == NULL) {
X                adjwp = wheadp;
X                while (adjwp->w_wndp != curwp)
X                        adjwp = adjwp->w_wndp;
X        }
X        if (adjwp->w_ntrows <= n) {
X                mlwrite("Impossible change");
X                return (FALSE);
X        }
X        if (curwp->w_wndp == adjwp) {           /* Shrink below.        */
X                lp = adjwp->w_linep;
X                for (i=0; i<n && lp!=adjwp->w_bufp->b_linep; ++i)
X                        lp = lforw(lp);
X                adjwp->w_linep  = lp;
X                adjwp->w_toprow += n;
X        } else {                                /* Shrink above.        */
X                lp = curwp->w_linep;
X                for (i=0; i<n && lback(lp)!=curbp->b_linep; ++i)
X                        lp = lback(lp);
X                curwp->w_linep  = lp;
X                curwp->w_toprow -= n;
X        }
X        curwp->w_ntrows += n;
X        adjwp->w_ntrows -= n;
X        curwp->w_flag |= WFMODE|WFHARD;
X        adjwp->w_flag |= WFMODE|WFHARD;
X        return (TRUE);
X}
X
X/*
X * Shrink the current window. Find the window that gains space. Hack at the
X * window descriptions. Ask the redisplay to do all the hard work. Bound to
X * "C-X C-Z".
X */
Xshrinkwind(f, n)
X{
X        register WINDOW *adjwp;
X        register LINE   *lp;
X        register int    i;
X
X        if (n < 0)
X                return (enlargewind(f, -n));
X        if (wheadp->w_wndp == NULL) {
X                mlwrite("Only one window");
X                return (FALSE);
X        }
X        if ((adjwp=curwp->w_wndp) == NULL) {
X                adjwp = wheadp;
X                while (adjwp->w_wndp != curwp)
X                        adjwp = adjwp->w_wndp;
X        }
X        if (curwp->w_ntrows <= n) {
X                mlwrite("Impossible change");
X                return (FALSE);
X        }
X        if (curwp->w_wndp == adjwp) {           /* Grow below.          */
X                lp = adjwp->w_linep;
X                for (i=0; i<n && lback(lp)!=adjwp->w_bufp->b_linep; ++i)
X                        lp = lback(lp);
X                adjwp->w_linep  = lp;
X                adjwp->w_toprow -= n;
X        } else {                                /* Grow above.          */
X                lp = curwp->w_linep;
X                for (i=0; i<n && lp!=curbp->b_linep; ++i)
X                        lp = lforw(lp);
X                curwp->w_linep  = lp;
X                curwp->w_toprow += n;
X        }
X        curwp->w_ntrows -= n;
X        adjwp->w_ntrows += n;
X        curwp->w_flag |= WFMODE|WFHARD;
X        adjwp->w_flag |= WFMODE|WFHARD;
X        return (TRUE);
X}
X
X/*    Resize the current window to the requested size    */
X
Xresize(f, n)
X
Xint f, n;    /* default flag and numeric argument */
X
X{
X    int clines;    /* current # of lines in window */
X
X    /* must have a non-default argument, else ignore call */
X    if (f == FALSE)
X        return(TRUE);
X
X    /* find out what to do */
X    clines = curwp->w_ntrows;
X
X    /* already the right size? */
X    if (clines == n)
X        return(TRUE);
X
X    return(enlargewind(TRUE, n - clines));
X}
X
X/*
X * Pick a window for a pop-up. Split the screen if there is only one window.
X * Pick the uppermost window that isn't the current window. An LRU algorithm
X * might be better. Return a pointer, or NULL on error.
X */
XWINDOW  *
Xwpopup()
X{
X        register WINDOW *wp;
X
X        if (wheadp->w_wndp == NULL              /* Only 1 window        */
X        && splitwind(FALSE, 0) == FALSE)        /* and it won't split   */
X                return (NULL);
X        wp = wheadp;                            /* Find window to use   */
X        while (wp!=NULL && wp==curwp)
X                wp = wp->w_wndp;
X        return (wp);
X}
X
Xscrnextup(f, n)        /* scroll the next window up (back) a page */
X
X{
X    nextwind(FALSE, 1);
X    backpage(f, n);
X    prevwind(FALSE, 1);
X}
X
Xscrnextdw(f, n)        /* scroll the next window down (forward) a page */
X
X{
X    nextwind(FALSE, 1);
X    forwpage(f, n);
X    prevwind(FALSE, 1);
X}
X
Xsavewnd(f, n)        /* save ptr to current window */
X
X{
X    swindow = curwp;
X    return(TRUE);
X}
X
Xrestwnd(f, n)        /* restore the saved screen */
X
X{
X    register WINDOW *wp;
X
X    /* find the window */
X    wp = wheadp;
X    while (wp != NULL) {
X        if (wp == swindow) {
X            curwp = wp;
X            curbp = wp->w_bufp;
X            upmode();
X            return (TRUE);
X        }
X        wp = wp->w_wndp;
X    }
X
X    mlwrite("[No such window exists]");
X    return(FALSE);
X}
X
Xnewsize(f, n)    /* resize the screen, re-writing the screen */
X
Xint f;    /* default flag */
Xint n;    /* numeric argument */
X
X{
X    WINDOW *wp;    /* current window being examined */
X    WINDOW *nextwp;    /* next window to scan */
X    WINDOW *lastwp;    /* last window scanned */
X    int lastline;    /* screen line of last line of current window */
X
X    /* if the command defaults, assume the largest */
X    if (f == FALSE)
X        n = term.t_mrow + 1;
X
X    /* make sure it's in range */
X    if (n < 3 || n > term.t_mrow + 1) {
X        mlwrite("%%Screen size out of range");
X        return(FALSE);
X    }
X
X    if (term.t_nrow == n - 1)
X        return(TRUE);
X    else if (term.t_nrow < n - 1) {
X
X        /* go to the last window */
X        wp = wheadp;
X        while (wp->w_wndp != NULL)
X            wp = wp->w_wndp;
X
X        /* and enlarge it as needed */
X        wp->w_ntrows = n - wp->w_toprow - 2;
X        wp->w_flag |= WFHARD|WFMODE;
X
X    } else {
X
X        /* rebuild the window structure */
X        nextwp = wheadp;
X        wp = NULL;
X        lastwp = NULL;
X        while (nextwp != NULL) {
X            wp = nextwp;
X            nextwp = wp->w_wndp;
X
X            /* get rid of it if it is too low */
X            if (wp->w_toprow > n - 2) {
X
X                /* save the point/mark if needed */
X                if (--wp->w_bufp->b_nwnd == 0) {
X                    wp->w_bufp->b_dotp = wp->w_dotp;
X                    wp->w_bufp->b_doto = wp->w_doto;
X                    wp->w_bufp->b_markp = wp->w_markp;
X                    wp->w_bufp->b_marko = wp->w_marko;
X                }
X
X                /* update curwp and lastwp if needed */
X                if (wp == curwp)
X                    curwp = wheadp;
X                    curbp = curwp->w_bufp;
X                if (lastwp != NULL)
X                    lastwp->w_wndp = NULL;
X
X                /* free the structure */
X                free((char *)wp);
X                wp = NULL;
X
X            } else {
X                /* need to change this window size? */
X                lastline = wp->w_toprow + wp->w_ntrows - 1;
X                if (lastline >= n - 2) {
X                    wp->w_ntrows = n - wp->w_toprow - 2;
X                    wp->w_flag |= WFHARD|WFMODE;
X                }
X            }
X
X            lastwp = wp;
X        }
X    }
X
X    /* screen is garbage */
X    term.t_nrow = n - 1;
X    sgarbf = TRUE;
X    return(TRUE);
X}
X
Xnewwidth(f, n)    /* resize the screen, re-writing the screen */
X
Xint f;    /* default flag */
Xint n;    /* numeric argument */
X
X{
X    register WINDOW *wp;
X
X    /* if the command defaults, assume the largest */
X    if (f == FALSE)
X        n = term.t_mcol;
X
X    /* make sure it's in range */
X    if (n < 10 || n > term.t_mcol) {
X        mlwrite("%%Screen width out of range");
X        return(FALSE);
X    }
X
X    /* otherwise, just re-width it (no big deal) */
X    term.t_ncol = n;
X    term.t_margin = n / 10;
X    term.t_scrsiz = n - (term.t_margin * 2);
X
X    /* florce all windows to redraw */
X    wp = wheadp;
X    while (wp) {
X        wp->w_flag |= WFHARD | WFMOVE | WFMODE;
X        wp = wp->w_wndp;
X    }
X    sgarbf = TRUE;
X
X    return(TRUE);
X}
X
Xint getwpos()    /* get screen offset of current line in current window */
X
X{
X    register int sline;    /* screen line from top of window */
X    register LINE *lp;    /* scannile line pointer */
X
X    /* search down the line we want */
X    lp = curwp->w_linep;
X    sline = 1;
X    while (lp != curwp->w_dotp) {
X        ++sline;
X        lp = lforw(lp);
X    }
X
X    /* and return the value */
X    return(sline);
X}
FRIDAY_NIGHT
echo extracting - word.c
sed 's/^X//' > word.c << 'FRIDAY_NIGHT'
X/*
X * The routines in this file implement commands that work word or a
X * paragraph at a time.  There are all sorts of word mode commands.  If I
X * do any sentence mode commands, they are likely to be put in this file.
X */
X
X#include    <stdio.h>
X#include    "estruct.h"
X#include    "edef.h"
X
X/* Word wrap on n-spaces. Back-over whatever precedes the point on the current
X * line and stop on the first word-break or the beginning of the line. If we
X * reach the beginning of the line, jump back to the end of the word and start
X * a new line.    Otherwise, break the line at the word-break, eat it, and jump
X * back to the end of the word.
X * Returns TRUE on success, FALSE on errors.
X */
Xwrapword(f, n)
X
Xint f;        /* default flag */
Xint n;        /* numeric argument */
X
X{
X    register int cnt;    /* size of word wrapped to next line */
X    register int c;        /* charector temporary */
X
X    /* backup from the <NL> 1 char */
X    if (!backchar(0, 1))
X        return(FALSE);
X
X    /* back up until we aren't in a word,
X       make sure there is a break in the line */
X    cnt = 0;
X    while (((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' ')
X                && (c != '\t')) {
X        cnt++;
X        if (!backchar(0, 1))
X            return(FALSE);
X        /* if we make it to the beginning, start a new line */
X        if (curwp->w_doto == 0) {
X            gotoeol(FALSE, 0);
X            return(lnewline());
X        }
X    }
X
X    /* delete the forward white space */
X    if (!forwdel(0, 1))
X        return(FALSE);
X
X    /* put in a end of line */
X    if (!lnewline())
X        return(FALSE);
X
X    /* and past the first word */
X    while (cnt-- > 0) {
X        if (forwchar(FALSE, 1) == FALSE)
X            return(FALSE);
X    }
X    return(TRUE);
X}
X
X/*
X * Move the cursor backward by "n" words. All of the details of motion are
X * performed by the "backchar" and "forwchar" routines. Error if you try to
X * move beyond the buffers.
X */
Xbackword(f, n)
X{
X    if (n < 0)
X        return (forwword(f, -n));
X    if (backchar(FALSE, 1) == FALSE)
X        return (FALSE);
X    while (n--) {
X        while (inword() == FALSE) {
X            if (backchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X        while (inword() != FALSE) {
X            if (backchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X    }
X    return (forwchar(FALSE, 1));
X}
X
X/*
X * Move the cursor forward by the specified number of words. All of the motion
X * is done by "forwchar". Error if you try and move beyond the buffer's end.
X */
Xforwword(f, n)
X{
X    if (n < 0)
X        return (backword(f, -n));
X    while (n--) {
X        while (inword() == TRUE) {
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X
X        while (inword() == FALSE) {
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X    }
X    return(TRUE);
X}
X
X/*
X * Move the cursor forward by the specified number of words. As you move,
X * convert any characters to upper case. Error if you try and move beyond the
X * end of the buffer. Bound to "M-U".
X */
Xupperword(f, n)
X{
X    register int    c;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X    if (n < 0)
X        return (FALSE);
X    while (n--) {
X        while (inword() == FALSE) {
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X        while (inword() != FALSE) {
X            c = lgetc(curwp->w_dotp, curwp->w_doto);
X            if (c>='a' && c<='z') {
X                c -= 'a'-'A';
X                lputc(curwp->w_dotp, curwp->w_doto, c);
X                lchange(WFHARD);
X            }
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X    }
X    return (TRUE);
X}
X
X/*
X * Move the cursor forward by the specified number of words. As you move
X * convert characters to lower case. Error if you try and move over the end of
X * the buffer. Bound to "M-L".
X */
Xlowerword(f, n)
X{
X    register int    c;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X    if (n < 0)
X        return (FALSE);
X    while (n--) {
X        while (inword() == FALSE) {
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X        while (inword() != FALSE) {
X            c = lgetc(curwp->w_dotp, curwp->w_doto);
X            if (c>='A' && c<='Z') {
X                c += 'a'-'A';
X                lputc(curwp->w_dotp, curwp->w_doto, c);
X                lchange(WFHARD);
X            }
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X    }
X    return (TRUE);
X}
X
X/*
X * Move the cursor forward by the specified number of words. As you move
X * convert the first character of the word to upper case, and subsequent
X * characters to lower case. Error if you try and move past the end of the
X * buffer. Bound to "M-C".
X */
Xcapword(f, n)
X{
X    register int    c;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X    if (n < 0)
X        return (FALSE);
X    while (n--) {
X        while (inword() == FALSE) {
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        }
X        if (inword() != FALSE) {
X            c = lgetc(curwp->w_dotp, curwp->w_doto);
X            if (c>='a' && c<='z') {
X                c -= 'a'-'A';
X                lputc(curwp->w_dotp, curwp->w_doto, c);
X                lchange(WFHARD);
X            }
X            if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X            while (inword() != FALSE) {
X                c = lgetc(curwp->w_dotp, curwp->w_doto);
X                if (c>='A' && c<='Z') {
X                    c += 'a'-'A';
X                    lputc(curwp->w_dotp, curwp->w_doto, c);
X                    lchange(WFHARD);
X                }
X                if (forwchar(FALSE, 1) == FALSE)
X                    return (FALSE);
X            }
X        }
X    }
X    return (TRUE);
X}
X
X/*
X * Kill forward by "n" words. Remember the location of dot. Move forward by
X * the right number of words. Put dot back where it was and issue the kill
X * command for the right number of characters. With a zero argument, just
X * kill one word and no whitespace. Bound to "M-D".
X */
Xdelfword(f, n)
X{
X    register LINE    *dotp;    /* original cursor line */
X    register int    doto;    /*    and row */
X    register int c;        /* temp char */
X    long size;        /* # of chars to delete */
X
X    /* don't allow this command if we are in read only mode */
X    if (curbp->b_mode&MDVIEW)
X        return(rdonly());
X
X    /* ignore the command if there is a negative argument */
X    if (n < 0)
X        return (FALSE);
X
X    /* Clear the kill buffer if last command wasn't a kill */
X    if ((lastflag&CFKILL) == 0)
X        kdelete();
X    thisflag |= CFKILL;    /* this command is a kill */
X
X    /* save the current cursor position */
X    dotp = curwp->w_dotp;
X    doto = curwp->w_doto;
X
X    /* figure out how many characters to give the axe */
X    size = 0;
X
X    /* get us into a word.... */
X    while (inword() == FALSE) {
X        if (forwchar(FALSE, 1) == FALSE)
X            return(FALSE);
X        ++size;
X    }
X
X    if (n == 0) {
X        /* skip one word, no whitespace! */
X        while (inword() == TRUE) {
X            if (forwchar(FALSE, 1) == FALSE)
X                return(FALSE);
X            ++size;
X        }
X    } else {
X        /* skip n words.... */
X        while (n--) {
X
X            /* if we are at EOL; skip to the beginning of the next */
X            while (curwp->w_doto == llength(curwp->w_dotp)) {
X                if (forwchar(FALSE, 1) == FALSE)
X                    return(FALSE);
X                ++size;
X            }
X
X            /* move forward till we are at the end of the word */
X            while (inword() == TRUE) {
X                if (forwchar(FALSE, 1) == FALSE)
X                    return(FALSE);
X                ++size;
X            }
X
X            /* if there are more words, skip the interword stuff */
X            if (n != 0)
X                while (inword() == FALSE) {
X                    if (forwchar(FALSE, 1) == FALSE)
X                        return(FALSE);
X                    ++size;
X                }
X        }
X
X        /* skip whitespace and newlines */
X        while ((curwp->w_doto == llength(curwp->w_dotp)) ||
X            ((c = lgetc(curwp->w_dotp, curwp->w_doto)) == ' ') ||
X            (c == '\t')) {
X                if (forwchar(FALSE, 1) == FALSE)
X                    break;
X                ++size;
X        }
X    }
X
X    /* restore the original position and delete the words */
X    curwp->w_dotp = dotp;
X    curwp->w_doto = doto;
X    return (ldelete(size, TRUE));
X}
X
X/*
X * Kill backwards by "n" words. Move backwards by the desired number of words,
X * counting the characters. When dot is finally moved to its resting place,
X * fire off the kill command. Bound to "M-Rubout" and to "M-Backspace".
X */
Xdelbword(f, n)
X{
X    long size;
X
X    /* don't allow this command if we are in read only mode */
X    if (curbp->b_mode&MDVIEW)
X        return(rdonly());
X
X    /* ignore the command if there is a nonpositive argument */
X    if (n <= 0)
X        return (FALSE);
X
X    /* Clear the kill buffer if last command wasn't a kill */
X    if ((lastflag&CFKILL) == 0)
X        kdelete();
X    thisflag |= CFKILL;    /* this command is a kill */
X
X    if (backchar(FALSE, 1) == FALSE)
X        return (FALSE);
X    size = 0;
X    while (n--) {
X        while (inword() == FALSE) {
X            if (backchar(FALSE, 1) == FALSE)
X                return (FALSE);
X            ++size;
X        }
X        while (inword() != FALSE) {
X            ++size;
X            if (backchar(FALSE, 1) == FALSE)
X                goto bckdel;
X        }
X    }
X    if (forwchar(FALSE, 1) == FALSE)
X        return (FALSE);
Xbckdel:    return (ldelete(size, TRUE));
X}
X
X/*
X * Return TRUE if the character at dot is a character that is considered to be
X * part of a word. The word character list is hard coded. Should be setable.
X */
Xinword()
X{
X    register int    c;
X
X    if (curwp->w_doto == llength(curwp->w_dotp))
X        return (FALSE);
X    c = lgetc(curwp->w_dotp, curwp->w_doto);
X    if (c>='a' && c<='z')
X        return (TRUE);
X    if (c>='A' && c<='Z')
X        return (TRUE);
X    if (c>='0' && c<='9')
X        return (TRUE);
X    return (FALSE);
X}
X
X#if    WORDPRO
Xfillpara(f, n)    /* Fill the current paragraph according to the current
X           fill column                        */
X
Xint f, n;    /* deFault flag and Numeric argument */
X
X{
X    register int c;            /* current char durring scan    */
X    register int wordlen;        /* length of current word    */
X    register int clength;        /* position on line during fill    */
X    register int i;            /* index during word copy    */
X    register int newlength;        /* tentative new line length    */
X    register int eopflag;        /* Are we at the End-Of-Paragraph? */
X    register int firstflag;        /* first word? (needs no space)    */
X    register LINE *eopline;        /* pointer to line just past EOP */
X    register int dotflag;        /* was the last char a period?    */
X    char wbuf[NSTRING];        /* buffer for current word    */
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X    if (fillcol == 0) {    /* no fill column set */
X        mlwrite("No fill column set");
X        return(FALSE);
X    }
X
X    /* record the pointer to the line just past the EOP */
X    gotoeop(FALSE, 1);
X    eopline = lforw(curwp->w_dotp);
X
X    /* and back top the beginning of the paragraph */
X    gotobop(FALSE, 1);
X
X    /* initialize various info */
X    clength = curwp->w_doto;
X    if (clength && curwp->w_dotp->l_text[0] == TAB)
X        clength = 8;
X    wordlen = 0;
X    dotflag = FALSE;
X
X    /* scan through lines, filling words */
X    firstflag = TRUE;
X    eopflag = FALSE;
X    while (!eopflag) {
X        /* get the next character in the paragraph */
X        if (curwp->w_doto == llength(curwp->w_dotp)) {
X            c = ' ';
X            if (lforw(curwp->w_dotp) == eopline)
X                eopflag = TRUE;
X        } else
X            c = lgetc(curwp->w_dotp, curwp->w_doto);
X
X        /* and then delete it */
X        ldelete(1L, FALSE);
X
X        /* if not a separator, just add it in */
X        if (c != ' ' && c != '\t') {
X            dotflag = (c == '.');        /* was it a dot */
X            if (wordlen < NSTRING - 1)
X                wbuf[wordlen++] = c;
X        } else if (wordlen) {
X            /* at a word break with a word waiting */
X            /* calculate tentitive new length with word added */
X            newlength = clength + 1 + wordlen;
X            if (newlength <= fillcol) {
X                /* add word to current line */
X                if (!firstflag) {
X                    linsert(1, ' '); /* the space */
X                    ++clength;
X                }
X                firstflag = FALSE;
X            } else {
X                /* start a new line */
X                lnewline();
X                clength = 0;
X            }
X
X            /* and add the word in in either case */
X            for (i=0; i<wordlen; i++) {
X                linsert(1, wbuf[i]);
X                ++clength;
X            }
X            if (dotflag) {
X                linsert(1, ' ');
X                ++clength;
X            }
X            wordlen = 0;
X        }
X    }
X    /* and add a last newline for the end of our new paragraph */
X    lnewline();
X    return(TRUE);
X}
X
Xkillpara(f, n)    /* delete n paragraphs starting with the current one */
X
Xint f;    /* default flag */
Xint n;    /* # of paras to delete */
X
X{
X    register int status;    /* returned status of functions */
X
X    while (n--) {        /* for each paragraph to delete */
X
X        /* mark out the end and beginning of the para to delete */
X        gotoeop(FALSE, 1);
X
X        /* set the mark here */
X        curwp->w_markp = curwp->w_dotp;
X        curwp->w_marko = curwp->w_doto;
X
X        /* go to the beginning of the paragraph */
X        gotobop(FALSE, 1);
X        curwp->w_doto = 0;    /* force us to the beginning of line */
X
X        /* and delete it */
X        if ((status = killregion(FALSE, 1)) != TRUE)
X            return(status);
X
X        /* and clean up the 2 extra lines */
X        ldelete(2L, TRUE);
X    }
X    return(TRUE);
X}
X
X
X/*    wordcount:    count the # of words in the marked region,
X            along with average word sizes, # of chars, etc,
X            and report on them.            */
X
Xwordcount(f, n)
X
Xint f, n;    /* ignored numeric arguments */
X
X{
X    register LINE *lp;    /* current line to scan */
X    register int offset;    /* current char to scan */
X    long size;        /* size of region left to count */
X    register int ch;    /* current character to scan */
X    register int wordflag;    /* are we in a word now? */
X    register int lastword;    /* were we just in a word? */
X    long nwords;        /* total # of words */
X    long nchars;        /* total number of chars */
X    int nlines;        /* total number of lines in region */
X    int avgch;        /* average number of chars/word */
X    int status;        /* status return code */
X    REGION region;        /* region to look at */
X
X    /* make sure we have a region to count */
X    if ((status = getregion(®ion)) != TRUE)
X        return(status);
X    lp = region.r_linep;
X    offset = region.r_offset;
X    size = region.r_size;
X
X    /* count up things */
X    lastword = FALSE;
X    nchars = 0L;
X    nwords = 0L;
X    nlines = 0;
X    while (size--) {
X
X        /* get the current character */
X        if (offset == llength(lp)) {    /* end of line */
X            ch = '\n';
X            lp = lforw(lp);
X            offset = 0;
X            ++nlines;
X        } else {
X            ch = lgetc(lp, offset);
X            ++offset;
X        }
X
X        /* and tabulate it */
X        wordflag = ((ch >= 'a' && ch <= 'z') ||
X                (ch >= 'A' && ch <= 'Z') ||
X                (ch >= '0' && ch <= '9'));
X        if (wordflag == TRUE && lastword == FALSE)
X            ++nwords;
X        lastword = wordflag;
X        ++nchars;
X    }
X
X    /* and report on the info */
X    if (nwords > 0L)
X        avgch = (int)((100L * nchars) / nwords);
X    else
X        avgch = 0;
X
X    mlwrite("Words %D Chars %D Lines %d Avg chars/word %f",
X        nwords, nchars, nlines + 1, avgch);
X    return(TRUE);
X}
X#endif
FRIDAY_NIGHT
echo mes.13 completed!
# That's all folks!