Usenet 1994 January/usenetsourcesnewsgroupsinfomagicjanuary1994.iso/sources/misc/volume1/8711/microemacs-3.9/5

Text File | 1987-11-17 | 42.5 KB | 1,798 lines

Article 81 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 5 of 16)
Message-ID: <[e-mail]>
Date: 14 Nov 87 21:08:42 GMT
Sender: [e-mail]
Lines: 1783
Approved: [e-mail]
X-Archive: comp.sources.misc/microemacs-3.9/4

# This is a shar archive.
# Remove everything above this line.
# Run the file through sh, not csh.
# (type `sh mes.5')
# If you do not see the message
#    `mes.5 completed!'
# then the file was incomplete.
echo extracting - exec.c
sed 's/^X//' > exec.c << 'FRIDAY_NIGHT'
X/*    This file is for functions dealing with execution of
X    commands, command lines, buffers, files and startup files
X
X    written 1986 by Daniel Lawrence                */
X
X#include    <stdio.h>
X#include    "estruct.h"
X#include    "edef.h"
X
X/* namedcmd:    execute a named command even if it is not bound */
X
Xnamedcmd(f, n)
X
Xint f, n;    /* command arguments [passed through to command executed] */
X
X{
X    register int (*kfunc)(); /* ptr to the requexted function to bind to */
X    int (*getname())();
X
X    /* prompt the user to type a named command */
X    mlwrite(": ");
X
X    /* and now get the function name to execute */
X    kfunc = getname();
X    if (kfunc == NULL) {
X        mlwrite("[No such function]");
X        return(FALSE);
X    }
X
X    /* and then execute the command */
X    return((*kfunc)(f, n));
X}
X
X/*    execcmd:    Execute a command line command to be typed in
X            by the user                    */
X
Xexeccmd(f, n)
X
Xint f, n;    /* default Flag and Numeric argument */
X
X{
X    register int status;        /* status return */
X    char cmdstr[NSTRING];        /* string holding command to execute */
X
X    /* get the line wanted */
X    if ((status = mlreply(": ", cmdstr, NSTRING)) != TRUE)
X        return(status);
X
X    execlevel = 0;
X    return(docmd(cmdstr));
X}
X
X/*    docmd:    take a passed string as a command line and translate
X        it to be executed as a command. This function will be
X        used by execute-command-line and by all source and
X        startup files. Lastflag/thisflag is also updated.
X
X    format of the command line is:
X
X        {# arg} <command-name> {<argument string(s)>}
X
X*/
X
Xdocmd(cline)
X
Xchar *cline;    /* command line to execute */
X
X{
X    register int f;        /* default argument flag */
X    register int n;        /* numeric repeat value */
X    int (*fnc)();        /* function to execute */
X    int status;        /* return status of function */
X    int oldcle;        /* old contents of clexec flag */
X    char *oldestr;        /* original exec string */
X    char tkn[NSTRING];    /* next token off of command line */
X    int (*fncmatch())();
X
X    /* if we are scanning and not executing..go back here */
X    if (execlevel)
X        return(TRUE);
X
X    oldestr = execstr;    /* save last ptr to string to execute */
X    execstr = cline;    /* and set this one as current */
X
X    /* first set up the default command values */
X    f = FALSE;
X    n = 1;
X    lastflag = thisflag;
X    thisflag = 0;
X
X    if ((status = macarg(tkn)) != TRUE) {    /* and grab the first token */
X        execstr = oldestr;
X        return(status);
X    }
X
X    /* process leadin argument */
X    if (gettyp(tkn) != TKCMD) {
X        f = TRUE;
X        strcpy(tkn, getval(tkn));
X        n = atoi(tkn);
X
X        /* and now get the command to execute */
X        if ((status = macarg(tkn)) != TRUE) {
X            execstr = oldestr;
X            return(status);
X        }
X    }
X
X    /* and match the token to see if it exists */
X    if ((fnc = fncmatch(tkn)) == NULL) {
X        mlwrite("[No such Function]");
X        execstr = oldestr;
X        return(FALSE);
X    }
X
X    /* save the arguments and go execute the command */
X    oldcle = clexec;        /* save old clexec flag */
X    clexec = TRUE;            /* in cline execution */
X    status = (*fnc)(f, n);        /* call the function */
X    cmdstatus = status;        /* save the status */
X    clexec = oldcle;        /* restore clexec flag */
X    execstr = oldestr;
X    return(status);
X}
X
X/* token:    chop a token off a string
X        return a pointer past the token
X*/
X
Xchar *token(src, tok, size)
X
Xchar *src, *tok;    /* source string, destination token string */
Xint size;        /* maximum size of token */
X
X{
X    register int quotef;    /* is the current string quoted? */
X    register char c;    /* temporary character */
X
X    /* first scan past any whitespace in the source string */
X    while (*src == ' ' || *src == '\t')
X        ++src;
X
X    /* scan through the source string */
X    quotef = FALSE;
X    while (*src) {
X        /* process special characters */
X        if (*src == '~') {
X            ++src;
X            if (*src == 0)
X                break;
X            switch (*src++) {
X                case 'r':    c = 13; break;
X                case 'n':    c = 10; break;
X                case 't':    c = 9;  break;
X                case 'b':    c = 8;  break;
X                case 'f':    c = 12; break;
X                default:    c = *(src-1);
X            }
X            if (--size > 0) {
X                *tok++ = c;
X            }
X        } else {
X            /* check for the end of the token */
X            if (quotef) {
X                if (*src == '"')
X                    break;
X            } else {
X                if (*src == ' ' || *src == '\t')
X                    break;
X            }
X
X            /* set quote mode if quote found */
X            if (*src == '"')
X                quotef = TRUE;
X
X            /* record the character */
X            c = *src++;
X            if (--size > 0)
X                *tok++ = c;
X        }
X    }
X
X    /* terminate the token and exit */
X    if (*src)
X        ++src;
X    *tok = 0;
X    return(src);
X}
X
Xmacarg(tok)    /* get a macro line argument */
X
Xchar *tok;    /* buffer to place argument */
X
X{
X    int savcle;    /* buffer to store original clexec */
X    int status;
X
X    savcle = clexec;    /* save execution mode */
X    clexec = TRUE;        /* get the argument */
X    status = nextarg("", tok, NSTRING, ctoec('\n'));
X    clexec = savcle;    /* restore execution mode */
X    return(status);
X}
X
X/*    nextarg:    get the next argument    */
X
Xnextarg(prompt, buffer, size, terminator)
X
Xchar *prompt;        /* prompt to use if we must be interactive */
Xchar *buffer;        /* buffer to put token into */
Xint size;        /* size of the buffer */
Xint terminator;        /* terminating char to be used on interactive fetch */
X
X{
X    /* if we are interactive, go get it! */
X    if (clexec == FALSE)
X        return(getstring(prompt, buffer, size, terminator));
X
X    /* grab token and advance past */
X    execstr = token(execstr, buffer, size);
X
X    /* evaluate it */
X    strcpy(buffer, getval(buffer));
X    return(TRUE);
X}
X
X/*    storemac:    Set up a macro buffer and flag to store all
X            executed command lines there            */
X
Xstoremac(f, n)
X
Xint f;        /* default flag */
Xint n;        /* macro number to use */
X
X{
X    register struct BUFFER *bp;    /* pointer to macro buffer */
X    char bname[NBUFN];        /* name of buffer to use */
X
X    /* must have a numeric argument to this function */
X    if (f == FALSE) {
X        mlwrite("No macro specified");
X        return(FALSE);
X    }
X
X    /* range check the macro number */
X    if (n < 1 || n > 40) {
X        mlwrite("Macro number out of range");
X        return(FALSE);
X    }
X
X    /* construct the macro buffer name */
X    strcpy(bname, "[Macro xx]");
X    bname[7] = '0' + (n / 10);
X    bname[8] = '0' + (n % 10);
X
X    /* set up the new macro buffer */
X    if ((bp = bfind(bname, TRUE, BFINVS)) == NULL) {
X        mlwrite("Can not create macro");
X        return(FALSE);
X    }
X
X    /* and make sure it is empty */
X    bclear(bp);
X
X    /* and set the macro store pointers to it */
X    mstore = TRUE;
X    bstore = bp;
X    return(TRUE);
X}
X
X#if    PROC
X/*    storeproc:    Set up a procedure buffer and flag to store all
X            executed command lines there            */
X
Xstoreproc(f, n)
X
Xint f;        /* default flag */
Xint n;        /* macro number to use */
X
X{
X    register struct BUFFER *bp;    /* pointer to macro buffer */
X    register int status;        /* return status */
X    char bname[NBUFN];        /* name of buffer to use */
X
X    /* a numeric argument means its a numbered macro */
X    if (f == TRUE)
X        return(storemac(f, n));
X
X    /* get the name of the procedure */
X        if ((status = mlreply("Procedure name: ", &bname[1], NBUFN-2)) != TRUE)
X                return(status);
X
X    /* construct the macro buffer name */
X    bname[0] = '[';
X    strcat(bname, "]");
X
X    /* set up the new macro buffer */
X    if ((bp = bfind(bname, TRUE, BFINVS)) == NULL) {
X        mlwrite("Can not create macro");
X        return(FALSE);
X    }
X
X    /* and make sure it is empty */
X    bclear(bp);
X
X    /* and set the macro store pointers to it */
X    mstore = TRUE;
X    bstore = bp;
X    return(TRUE);
X}
X
X/*    execproc:    Execute a procedure                */
X
Xexecproc(f, n)
X
Xint f, n;    /* default flag and numeric arg */
X
X{
X        register BUFFER *bp;        /* ptr to buffer to execute */
X        register int status;        /* status return */
X        char bufn[NBUFN+2];        /* name of buffer to execute */
X
X    /* find out what buffer the user wants to execute */
X        if ((status = mlreply("Execute procedure: ", &bufn[1], NBUFN)) != TRUE)
X                return(status);
X
X    /* construct the buffer name */
X    bufn[0] = '[';
X    strcat(bufn, "]");
X
X    /* find the pointer to that buffer */
X        if ((bp=bfind(bufn, FALSE, 0)) == NULL) {
X        mlwrite("No such procedure");
X                return(FALSE);
X        }
X
X    /* and now execute it as asked */
X    while (n-- > 0)
X        if ((status = dobuf(bp)) != TRUE)
X            return(status);
X    return(TRUE);
X}
X#endif
X
X/*    execbuf:    Execute the contents of a buffer of commands    */
X
Xexecbuf(f, n)
X
Xint f, n;    /* default flag and numeric arg */
X
X{
X        register BUFFER *bp;        /* ptr to buffer to execute */
X        register int status;        /* status return */
X        char bufn[NSTRING];        /* name of buffer to execute */
X
X    /* find out what buffer the user wants to execute */
X        if ((status = mlreply("Execute buffer: ", bufn, NBUFN)) != TRUE)
X                return(status);
X
X    /* find the pointer to that buffer */
X        if ((bp=bfind(bufn, FALSE, 0)) == NULL) {
X        mlwrite("No such buffer");
X                return(FALSE);
X        }
X
X    /* and now execute it as asked */
X    while (n-- > 0)
X        if ((status = dobuf(bp)) != TRUE)
X            return(status);
X    return(TRUE);
X}
X
X/*    dobuf:    execute the contents of the buffer pointed to
X        by the passed BP
X
X    Directives start with a "!" and include:
X
X    !endm        End a macro
X    !if (cond)    conditional execution
X    !else
X    !endif
X    !return        Return (terminating current macro)
X    !goto <label>    Jump to a label in the current macro
X    !force        Force macro to continue...even if command fails
X    !while (cond)    Execute a loop if the condition is true
X    !endwhile
X
X    Line Labels begin with a "*" as the first nonblank char, like:
X
X    *LBL01
X*/
X
Xdobuf(bp)
X
XBUFFER *bp;    /* buffer to execute */
X
X{
X        register int status;    /* status return */
X    register LINE *lp;    /* pointer to line to execute */
X    register LINE *hlp;    /* pointer to line header */
X    register LINE *glp;    /* line to goto */
X    LINE *mp;        /* Macro line storage temp */
X    int dirnum;        /* directive index */
X    int linlen;        /* length of line to execute */
X    int i;            /* index */
X    int c;            /* temp character */
X    int force;        /* force TRUE result? */
X    WINDOW *wp;        /* ptr to windows to scan */
X    WHBLOCK *whlist;    /* ptr to !WHILE list */
X    WHBLOCK *scanner;    /* ptr during scan */
X    WHBLOCK *whtemp;    /* temporary ptr to a WHBLOCK */
X    char *einit;        /* initial value of eline */
X    char *eline;        /* text of line to execute */
X    char tkn[NSTRING];    /* buffer to evaluate an expresion in */
X
X#if    DEBUGM
X    char *sp;            /* temp for building debug string */
X    register char *ep;    /* ptr to end of outline */
X#endif
X
X    /* clear IF level flags/while ptr */
X    execlevel = 0;
X    whlist = NULL;
X    scanner = NULL;
X
X    /* scan the buffer to execute, building WHILE header blocks */
X    hlp = bp->b_linep;
X    lp = hlp->l_fp;
X    while (lp != hlp) {
X        /* scan the current line */
X        eline = lp->l_text;
X        i = lp->l_used;
X
X        /* trim leading whitespace */
X        while (i-- > 0 && (*eline == ' ' || *eline == '\t'))
X            ++eline;
X
X        /* if theres nothing here, don't bother */
X        if (i <= 0)
X            goto nxtscan;
X
X        /* if is a while directive, make a block... */
X        if (eline[0] == '!' && eline[1] == 'w' && eline[2] == 'h') {
X            whtemp = (WHBLOCK *)malloc(sizeof(WHBLOCK));
X            if (whtemp == NULL) {
Xnoram:                mlwrite("%%Out of memory during while scan");
Xfailexit:            freewhile(scanner);
X                freewhile(whlist);
X                return(FALSE);
X            }
X            whtemp->w_begin = lp;
X            whtemp->w_type = BTWHILE;
X            whtemp->w_next = scanner;
X            scanner = whtemp;
X        }
X
X        /* if is a BREAK directive, make a block... */
X        if (eline[0] == '!' && eline[1] == 'b' && eline[2] == 'r') {
X            if (scanner == NULL) {
X                mlwrite("%%!BREAK outside of any !WHILE loop");
X                goto failexit;
X            }
X            whtemp = (WHBLOCK *)malloc(sizeof(WHBLOCK));
X            if (whtemp == NULL)
X                goto noram;
X            whtemp->w_begin = lp;
X            whtemp->w_type = BTBREAK;
X            whtemp->w_next = scanner;
X            scanner = whtemp;
X        }
X
X        /* if it is an endwhile directive, record the spot... */
X        if (eline[0] == '!' && strncmp(&eline[1], "endw", 4) == 0) {
X            if (scanner == NULL) {
X                mlwrite("%%!ENDWHILE with no preceding !WHILE in '%s'",
X                    bp->b_bname);
X                goto failexit;
X            }
X            /* move top records from the scanner list to the
X               whlist until we have moved all BREAK records
X               and one WHILE record */
X            do {
X                scanner->w_end = lp;
X                whtemp = whlist;
X                whlist = scanner;
X                scanner = scanner->w_next;
X                whlist->w_next = whtemp;
X            } while (whlist->w_type == BTBREAK);
X        }
X
Xnxtscan:    /* on to the next line */
X        lp = lp->l_fp;
X    }
X
X    /* while and endwhile should match! */
X    if (scanner != NULL) {
X        mlwrite("%%!WHILE with no matching !ENDWHILE in '%s'",
X            bp->b_bname);
X        goto failexit;
X    }
X
X    /* let the first command inherit the flags from the last one..*/
X    thisflag = lastflag;
X
X    /* starting at the beginning of the buffer */
X    hlp = bp->b_linep;
X    lp = hlp->l_fp;
X    while (lp != hlp) {
X        /* allocate eline and copy macro line to it */
X        linlen = lp->l_used;
X        if ((einit = eline = malloc(linlen+1)) == NULL) {
X            mlwrite("%%Out of Memory during macro execution");
X            freewhile(whlist);
X            return(FALSE);
X        }
X        strncpy(eline, lp->l_text, linlen);
X        eline[linlen] = 0;    /* make sure it ends */
X
X        /* trim leading whitespace */
X        while (*eline == ' ' || *eline == '\t')
X            ++eline;
X
X        /* dump comments and blank lines */
X        if (*eline == ';' || *eline == 0)
X            goto onward;
X
X#if    DEBUGM
X        /* if $debug == TRUE, every line to execute
X           gets echoed and a key needs to be pressed to continue
X           ^G will abort the command */
X
X        if (macbug) {
X            strcpy(outline, "<<<");
X
X            /* debug macro name */
X            strcat(outline, bp->b_bname);
X            strcat(outline, ":");
X
X            /* debug if levels */
X            strcat(outline, itoa(execlevel));
X            strcat(outline, ":");
X
X            /* and lastly the line */
X            strcat(outline, eline);
X            strcat(outline, ">>>");
X
X            /* change all '%' to ':' so mlwrite won't expect arguments */
X            sp = outline;
X            while (*sp)
X            if (*sp++ == '%') {
X                /* advance to the end */
X                ep = --sp;
X                while (*ep++)
X                    ;
X                /* null terminate the string one out */
X                *(ep + 1) = 0;
X                /* copy backwards */
X                while(ep-- > sp)
X                    *(ep + 1) = *ep;
X
X                /* and advance sp past the new % */
X                sp += 2;
X            }
X
X            /* write out the debug line */
X            mlforce(outline);
X            update(TRUE);
X
X            /* and get the keystroke */
X            if ((c = get1key()) == abortc) {
X                mlforce("[Macro aborted]");
X                freewhile(whlist);
X                return(FALSE);
X            }
X
X            if (c == metac)
X                macbug = FALSE;
X        }
X#endif
X
X        /* Parse directives here.... */
X        dirnum = -1;
X        if (*eline == '!') {
X            /* Find out which directive this is */
X            ++eline;
X            for (dirnum = 0; dirnum < NUMDIRS; dirnum++)
X                if (strncmp(eline, dname[dirnum],
X                            strlen(dname[dirnum])) == 0)
X                    break;
X
X            /* and bitch if it's illegal */
X            if (dirnum == NUMDIRS) {
X                mlwrite("%%Unknown Directive");
X                freewhile(whlist);
X                return(FALSE);
X            }
X
X            /* service only the !ENDM macro here */
X            if (dirnum == DENDM) {
X                mstore = FALSE;
X                bstore = NULL;
X                goto onward;
X            }
X
X            /* restore the original eline....*/
X            --eline;
X        }
X
X        /* if macro store is on, just salt this away */
X        if (mstore) {
X            /* allocate the space for the line */
X            linlen = strlen(eline);
X            if ((mp=lalloc(linlen)) == NULL) {
X                mlwrite("Out of memory while storing macro");
X                return (FALSE);
X            }
X
X            /* copy the text into the new line */
X            for (i=0; i<linlen; ++i)
X                lputc(mp, i, eline[i]);
X
X            /* attach the line to the end of the buffer */
X                   bstore->b_linep->l_bp->l_fp = mp;
X            mp->l_bp = bstore->b_linep->l_bp;
X            bstore->b_linep->l_bp = mp;
X            mp->l_fp = bstore->b_linep;
X            goto onward;
X        }
X
X
X        force = FALSE;
X
X        /* dump comments */
X        if (*eline == '*')
X            goto onward;
X
X        /* now, execute directives */
X        if (dirnum != -1) {
X            /* skip past the directive */
X            while (*eline && *eline != ' ' && *eline != '\t')
X                ++eline;
X            execstr = eline;
X
X            switch (dirnum) {
X            case DIF:    /* IF directive */
X                /* grab the value of the logical exp */
X                if (execlevel == 0) {
X                    if (macarg(tkn) != TRUE)
X                        goto eexec;
X                    if (stol(tkn) == FALSE)
X                        ++execlevel;
X                } else
X                    ++execlevel;
X                goto onward;
X
X            case DWHILE:    /* WHILE directive */
X                /* grab the value of the logical exp */
X                if (execlevel == 0) {
X                    if (macarg(tkn) != TRUE)
X                        goto eexec;
X                    if (stol(tkn) == TRUE)
X                        goto onward;
X                }
X                /* drop down and act just like !BREAK */
X
X            case DBREAK:    /* BREAK directive */
X                if (dirnum == DBREAK && execlevel)
X                    goto onward;
X
X                /* jump down to the endwhile */
X                /* find the right while loop */
X                whtemp = whlist;
X                while (whtemp) {
X                    if (whtemp->w_begin == lp)
X                        break;
X                    whtemp = whtemp->w_next;
X                }
X
X                if (whtemp == NULL) {
X                    mlwrite("%%Internal While loop error");
X                    freewhile(whlist);
X                    return(FALSE);
X                }
X
X                /* reset the line pointer back.. */
X                lp = whtemp->w_end;
X                goto onward;
X
X            case DELSE:    /* ELSE directive */
X                if (execlevel == 1)
X                    --execlevel;
X                else if (execlevel == 0 )
X                    ++execlevel;
X                goto onward;
X
X            case DENDIF:    /* ENDIF directive */
X                if (execlevel)
X                    --execlevel;
X                goto onward;
X
X            case DGOTO:    /* GOTO directive */
X                /* .....only if we are currently executing */
X                if (execlevel == 0) {
X
X                    /* grab label to jump to */
X                    eline = token(eline, golabel, NPAT);
X                    linlen = strlen(golabel);
X                    glp = hlp->l_fp;
X                    while (glp != hlp) {
X                        if (*glp->l_text == '*' &&
X                            (strncmp(&glp->l_text[1], golabel,
X                                    linlen) == 0)) {
X                            lp = glp;
X                            goto onward;
X                        }
X                        glp = glp->l_fp;
X                    }
X                    mlwrite("%%No such label");
X                    freewhile(whlist);
X                    return(FALSE);
X                }
X                goto onward;
X
X            case DRETURN:    /* RETURN directive */
X                if (execlevel == 0)
X                    goto eexec;
X                goto onward;
X
X            case DENDWHILE:    /* ENDWHILE directive */
X                if (execlevel) {
X                    --execlevel;
X                    goto onward;
X                } else {
X                    /* find the right while loop */
X                    whtemp = whlist;
X                    while (whtemp) {
X                        if (whtemp->w_type == BTWHILE &&
X                            whtemp->w_end == lp)
X                            break;
X                        whtemp = whtemp->w_next;
X                    }
X
X                    if (whtemp == NULL) {
X                        mlwrite("%%Internal While loop error");
X                        freewhile(whlist);
X                        return(FALSE);
X                    }
X
X                    /* reset the line pointer back.. */
X                    lp = whtemp->w_begin->l_bp;
X                    goto onward;
X                }
X
X            case DFORCE:    /* FORCE directive */
X                force = TRUE;
X
X            }
X        }
X
X        /* execute the statement */
X        status = docmd(eline);
X        if (force)        /* force the status */
X            status = TRUE;
X
X        /* check for a command error */
X        if (status != TRUE) {
X            /* look if buffer is showing */
X            wp = wheadp;
X            while (wp != NULL) {
X                if (wp->w_bufp == bp) {
X                    /* and point it */
X                    wp->w_dotp = lp;
X                    wp->w_doto = 0;
X                    wp->w_flag |= WFHARD;
X                }
X                wp = wp->w_wndp;
X            }
X            /* in any case set the buffer . */
X            bp->b_dotp = lp;
X            bp->b_doto = 0;
X            free(einit);
X            execlevel = 0;
X            freewhile(whlist);
X            return(status);
X        }
X
Xonward:        /* on to the next line */
X        free(einit);
X        lp = lp->l_fp;
X    }
X
Xeexec:    /* exit the current function */
X    execlevel = 0;
X    freewhile(whlist);
X        return(TRUE);
X}
X
Xfreewhile(wp)    /* free a list of while block pointers */
X
XWHBLOCK *wp;    /* head of structure to free */
X
X{
X    if (wp == NULL)
X        return;
X    if (wp->w_next)
X        freewhile(wp->w_next);
X    free(wp);
X}
X
Xexecfile(f, n)    /* execute a series of commands in a file */
X
Xint f, n;    /* default flag and numeric arg to pass on to file */
X
X{
X    register int status;    /* return status of name query */
X    char fname[NSTRING];    /* name of file to execute */
X    char *fspec;        /* full file spec */
X
X    if ((status = mlreply("File to execute: ", fname, NSTRING -1)) != TRUE)
X        return(status);
X
X#if    1
X    /* look up the path for the file */
X    fspec = flook(fname, TRUE);
X
X    /* if it isn't around */
X    if (fspec == NULL)
X        return(FALSE);
X
X#endif
X    /* otherwise, execute it */
X    while (n-- > 0)
X        if ((status=dofile(fspec)) != TRUE)
X            return(status);
X
X    return(TRUE);
X}
X
X/*    dofile:    yank a file into a buffer and execute it
X        if there are no errors, delete the buffer on exit */
X
Xdofile(fname)
X
Xchar *fname;    /* file name to execute */
X
X{
X    register BUFFER *bp;    /* buffer to place file to exeute */
X    register BUFFER *cb;    /* temp to hold current buf while we read */
X    register int status;    /* results of various calls */
X    char bname[NBUFN];    /* name of buffer */
X
X    makename(bname, fname);        /* derive the name of the buffer */
X    unqname(bname);            /* make sure we don't stomp things */
X    if ((bp = bfind(bname, TRUE, 0)) == NULL) /* get the needed buffer */
X        return(FALSE);
X
X    bp->b_mode = MDVIEW;    /* mark the buffer as read only */
X    cb = curbp;        /* save the old buffer */
X    curbp = bp;        /* make this one current */
X    /* and try to read in the file to execute */
X    if ((status = readin(fname, FALSE)) != TRUE) {
X        curbp = cb;    /* restore the current buffer */
X        return(status);
X    }
X
X    /* go execute it! */
X    curbp = cb;        /* restore the current buffer */
X    if ((status = dobuf(bp)) != TRUE)
X        return(status);
X
X    /* if not displayed, remove the now unneeded buffer and exit */
X    if (bp->b_nwnd == 0)
X        zotbuf(bp);
X    return(TRUE);
X}
X
X/*    cbuf:    Execute the contents of a numbered buffer    */
X
Xcbuf(f, n, bufnum)
X
Xint f, n;    /* default flag and numeric arg */
Xint bufnum;    /* number of buffer to execute */
X
X{
X        register BUFFER *bp;        /* ptr to buffer to execute */
X        register int status;        /* status return */
X    static char bufname[] = "[Macro xx]";
X
X    /* make the buffer name */
X    bufname[7] = '0' + (bufnum / 10);
X    bufname[8] = '0' + (bufnum % 10);
X
X    /* find the pointer to that buffer */
X        if ((bp=bfind(bufname, FALSE, 0)) == NULL) {
X            mlwrite("Macro not defined");
X                return(FALSE);
X        }
X
X    /* and now execute it as asked */
X    while (n-- > 0)
X        if ((status = dobuf(bp)) != TRUE)
X            return(status);
X    return(TRUE);
X}
X
Xcbuf1(f, n)
X
X{
X    cbuf(f, n, 1);
X}
X
Xcbuf2(f, n)
X
X{
X    cbuf(f, n, 2);
X}
X
Xcbuf3(f, n)
X
X{
X    cbuf(f, n, 3);
X}
X
Xcbuf4(f, n)
X
X{
X    cbuf(f, n, 4);
X}
X
Xcbuf5(f, n)
X
X{
X    cbuf(f, n, 5);
X}
X
Xcbuf6(f, n)
X
X{
X    cbuf(f, n, 6);
X}
X
Xcbuf7(f, n)
X
X{
X    cbuf(f, n, 7);
X}
X
Xcbuf8(f, n)
X
X{
X    cbuf(f, n, 8);
X}
X
Xcbuf9(f, n)
X
X{
X    cbuf(f, n, 9);
X}
X
Xcbuf10(f, n)
X
X{
X    cbuf(f, n, 10);
X}
X
Xcbuf11(f, n)
X
X{
X    cbuf(f, n, 11);
X}
X
Xcbuf12(f, n)
X
X{
X    cbuf(f, n, 12);
X}
X
Xcbuf13(f, n)
X
X{
X    cbuf(f, n, 13);
X}
X
Xcbuf14(f, n)
X
X{
X    cbuf(f, n, 14);
X}
X
Xcbuf15(f, n)
X
X{
X    cbuf(f, n, 15);
X}
X
Xcbuf16(f, n)
X
X{
X    cbuf(f, n, 16);
X}
X
Xcbuf17(f, n)
X
X{
X    cbuf(f, n, 17);
X}
X
Xcbuf18(f, n)
X
X{
X    cbuf(f, n, 18);
X}
X
Xcbuf19(f, n)
X
X{
X    cbuf(f, n, 19);
X}
X
Xcbuf20(f, n)
X
X{
X    cbuf(f, n, 20);
X}
X
Xcbuf21(f, n)
X
X{
X    cbuf(f, n, 21);
X}
X
Xcbuf22(f, n)
X
X{
X    cbuf(f, n, 22);
X}
X
Xcbuf23(f, n)
X
X{
X    cbuf(f, n, 23);
X}
X
Xcbuf24(f, n)
X
X{
X    cbuf(f, n, 24);
X}
X
Xcbuf25(f, n)
X
X{
X    cbuf(f, n, 25);
X}
X
Xcbuf26(f, n)
X
X{
X    cbuf(f, n, 26);
X}
X
Xcbuf27(f, n)
X
X{
X    cbuf(f, n, 27);
X}
X
Xcbuf28(f, n)
X
X{
X    cbuf(f, n, 28);
X}
X
Xcbuf29(f, n)
X
X{
X    cbuf(f, n, 29);
X}
X
Xcbuf30(f, n)
X
X{
X    cbuf(f, n, 30);
X}
X
Xcbuf31(f, n)
X
X{
X    cbuf(f, n, 31);
X}
X
Xcbuf32(f, n)
X
X{
X    cbuf(f, n, 32);
X}
X
Xcbuf33(f, n)
X
X{
X    cbuf(f, n, 33);
X}
X
Xcbuf34(f, n)
X
X{
X    cbuf(f, n, 34);
X}
X
Xcbuf35(f, n)
X
X{
X    cbuf(f, n, 35);
X}
X
Xcbuf36(f, n)
X
X{
X    cbuf(f, n, 36);
X}
X
Xcbuf37(f, n)
X
X{
X    cbuf(f, n, 37);
X}
X
Xcbuf38(f, n)
X
X{
X    cbuf(f, n, 38);
X}
X
Xcbuf39(f, n)
X
X{
X    cbuf(f, n, 39);
X}
X
Xcbuf40(f, n)
X
X{
X    cbuf(f, n, 40);
X}
X
X
FRIDAY_NIGHT
echo extracting - file.c
sed 's/^X//' > file.c << 'FRIDAY_NIGHT'
X/*    FILE.C:   for MicroEMACS
X
X    The routines in this file handle the reading, writing
X    and lookup of disk files.  All of details about the
X    reading and writing of the disk are in "fileio.c".
X
X*/
X
X#include        <stdio.h>
X#include    "estruct.h"
X#include        "edef.h"
X
X/*
X * Read a file into the current
X * buffer. This is really easy; all you do it
X * find the name of the file, and call the standard
X * "read a file into the current buffer" code.
X * Bound to "C-X C-R".
X */
Xfileread(f, n)
X{
X        register int    s;
X        char fname[NFILEN];
X
X    if (restflag)        /* don't allow this command if restricted */
X        return(resterr());
X        if ((s=mlreply("Read file: ", fname, NFILEN)) != TRUE)
X                return(s);
X        return(readin(fname, TRUE));
X}
X
X/*
X * Insert a file into the current
X * buffer. This is really easy; all you do it
X * find the name of the file, and call the standard
X * "insert a file into the current buffer" code.
X * Bound to "C-X C-I".
X */
Xinsfile(f, n)
X{
X        register int    s;
X        char fname[NFILEN];
X
X    if (restflag)        /* don't allow this command if restricted */
X        return(resterr());
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if ((s=mlreply("Insert file: ", fname, NFILEN)) != TRUE)
X                return(s);
X        return(ifile(fname));
X}
X
X/*
X * Select a file for editing.
X * Look around to see if you can find the
X * fine in another buffer; if you can find it
X * just switch to the buffer. If you cannot find
X * the file, create a new buffer, read in the
X * text, and switch to the new buffer.
X * Bound to C-X C-F.
X */
Xfilefind(f, n)
X{
X        char fname[NFILEN];    /* file user wishes to find */
X        register int s;        /* status return */
X
X    if (restflag)        /* don't allow this command if restricted */
X        return(resterr());
X        if ((s=mlreply("Find file: ", fname, NFILEN)) != TRUE)
X                return(s);
X    return(getfile(fname, TRUE));
X}
X
Xviewfile(f, n)    /* visit a file in VIEW mode */
X{
X        char fname[NFILEN];    /* file user wishes to find */
X        register int s;        /* status return */
X    register WINDOW *wp;    /* scan for windows that need updating */
X
X    if (restflag)        /* don't allow this command if restricted */
X        return(resterr());
X        if ((s=mlreply("View file: ", fname, NFILEN)) != TRUE)
X                return (s);
X    s = getfile(fname, FALSE);
X    if (s) {    /* if we succeed, put it in view mode */
X        curwp->w_bufp->b_mode |= MDVIEW;
X
X        /* scan through and update mode lines of all windows */
X        wp = wheadp;
X        while (wp != NULL) {
X            wp->w_flag |= WFMODE;
X            wp = wp->w_wndp;
X        }
X    }
X    return(s);
X}
X
X#if    CRYPT
Xresetkey()    /* reset the encryption key if needed */
X
X{
X    register int s;    /* return status */
X
X    /* turn off the encryption flag */
X    cryptflag = FALSE;
X
X    /* if we are in crypt mode */
X    if (curbp->b_mode & MDCRYPT) {
X        if (curbp->b_key[0] == 0) {
X            s = setkey(FALSE, 0);
X            if (s != TRUE)
X                return(s);
X        }
X
X        /* let others know... */
X        cryptflag = TRUE;
X
X        /* and set up the key to be used! */
X        /* de-encrypt it */
X        crypt((char *)NULL, 0);
X        crypt(curbp->b_key, strlen(curbp->b_key));
X
X        /* re-encrypt it...seeding it to start */
X        crypt((char *)NULL, 0);
X        crypt(curbp->b_key, strlen(curbp->b_key));
X    }
X
X    return(TRUE);
X}
X#endif
X
Xgetfile(fname, lockfl)
X
Xchar fname[];        /* file name to find */
Xint lockfl;        /* check the file for locks? */
X
X{
X        register BUFFER *bp;
X        register LINE   *lp;
X        register int    i;
X        register int    s;
X        char bname[NBUFN];    /* buffer name to put file */
X
X#if    MSDOS
X    mklower(fname);        /* msdos isn't case sensitive */
X#endif
X        for (bp=bheadp; bp!=NULL; bp=bp->b_bufp) {
X                if ((bp->b_flag&BFINVS)==0 && strcmp(bp->b_fname, fname)==0) {
X            swbuffer(bp);
X                        lp = curwp->w_dotp;
X                        i = curwp->w_ntrows/2;
X                        while (i-- && lback(lp)!=curbp->b_linep)
X                                lp = lback(lp);
X                        curwp->w_linep = lp;
X                        curwp->w_flag |= WFMODE|WFHARD;
X                        mlwrite("[Old buffer]");
X                        return (TRUE);
X                }
X        }
X        makename(bname, fname);                 /* New buffer name.     */
X        while ((bp=bfind(bname, FALSE, 0)) != NULL) {
X        /* old buffer name conflict code */
X                s = mlreply("Buffer name: ", bname, NBUFN);
X                if (s == ABORT)                 /* ^G to just quit      */
X                        return (s);
X                if (s == FALSE) {               /* CR to clobber it     */
X                        makename(bname, fname);
X                        break;
X                }
X        }
X        if (bp==NULL && (bp=bfind(bname, TRUE, 0))==NULL) {
X                mlwrite("Cannot create buffer");
X                return (FALSE);
X        }
X        if (--curbp->b_nwnd == 0) {             /* Undisplay.           */
X                curbp->b_dotp = curwp->w_dotp;
X                curbp->b_doto = curwp->w_doto;
X                curbp->b_markp = curwp->w_markp;
X                curbp->b_marko = curwp->w_marko;
X        }
X        curbp = bp;                             /* Switch to it.        */
X        curwp->w_bufp = bp;
X        curbp->b_nwnd++;
X        return(readin(fname, lockfl));          /* Read it in.          */
X}
X
X/*
X    Read file "fname" into the current buffer, blowing away any text
X    found there.  Called by both the read and find commands.  Return
X    the final status of the read.  Also called by the mainline, to
X    read in a file specified on the command line as an argument.
X    The command bound to M-FNR is called after the buffer is set up
X    and before it is read.
X*/
X
Xreadin(fname, lockfl)
X
Xchar    fname[];    /* name of file to read */
Xint    lockfl;        /* check for file locks? */
X
X{
X        register LINE   *lp1;
X        register LINE   *lp2;
X        register int    i;
X        register WINDOW *wp;
X        register BUFFER *bp;
X        register int    s;
X        register int    nbytes;
X        register int    nline;
X    int        lflag;        /* any lines longer than allowed? */
X    char mesg[NSTRING];
X
X#if    FILOCK
X    if (lockfl && lockchk(fname) == ABORT)
X        return(ABORT);
X#endif
X#if    CRYPT
X    s = resetkey();
X    if (s != TRUE)
X        return(s);
X#endif
X        bp = curbp;                             /* Cheap.               */
X        if ((s=bclear(bp)) != TRUE)             /* Might be old.        */
X                return (s);
X        bp->b_flag &= ~(BFINVS|BFCHG);
X        strcpy(bp->b_fname, fname);
X
X    /* let a user macro get hold of things...if he wants */
X    execute(META|SPEC|'R', FALSE, 1);
X
X    /* turn off ALL keyboard translation in case we get a dos error */
X    TTkclose();
X
X        if ((s=ffropen(fname)) == FIOERR)       /* Hard file open.      */
X                goto out;
X
X        if (s == FIOFNF) {                      /* File not found.      */
X                mlwrite("[New file]");
X                goto out;
X        }
X
X    /* read the file in */
X        mlwrite("[Reading file]");
X        nline = 0;
X    lflag = FALSE;
X        while ((s=ffgetline()) == FIOSUC) {
X                nbytes = strlen(fline);
X                if ((lp1=lalloc(nbytes)) == NULL) {
X                        s = FIOMEM;             /* Keep message on the  */
X                        break;                  /* display.             */
X                }
X                lp2 = lback(curbp->b_linep);
X                lp2->l_fp = lp1;
X                lp1->l_fp = curbp->b_linep;
X                lp1->l_bp = lp2;
X                curbp->b_linep->l_bp = lp1;
X                for (i=0; i<nbytes; ++i)
X                        lputc(lp1, i, fline[i]);
X                ++nline;
X        }
X        ffclose();                              /* Ignore errors.       */
X    strcpy(mesg, "[");
X    if (s==FIOERR) {
X        strcat(mesg, "I/O ERROR, ");
X        curbp->b_flag |= BFTRUNC;
X    }
X    if (s == FIOMEM) {
X        strcat(mesg, "OUT OF MEMORY, ");
X        curbp->b_flag |= BFTRUNC;
X    }
X    sprintf(&mesg[strlen(mesg)], "Read %d line", nline);
X        if (nline > 1)
X        strcat(mesg, "s");
X    strcat(mesg, "]");
X    mlwrite(mesg);
X
Xout:
X    TTkopen();    /* open the keyboard again */
X        for (wp=wheadp; wp!=NULL; wp=wp->w_wndp) {
X                if (wp->w_bufp == curbp) {
X                        wp->w_linep = lforw(curbp->b_linep);
X                        wp->w_dotp  = lforw(curbp->b_linep);
X                        wp->w_doto  = 0;
X                        wp->w_markp = NULL;
X                        wp->w_marko = 0;
X                        wp->w_flag |= WFMODE|WFHARD;
X                }
X        }
X        if (s == FIOERR || s == FIOFNF)        /* False if error.      */
X                return(FALSE);
X        return (TRUE);
X}
X
X/*
X * Take a file name, and from it
X * fabricate a buffer name. This routine knows
X * about the syntax of file names on the target system.
X * I suppose that this information could be put in
X * a better place than a line of code.
X */
Xmakename(bname, fname)
Xchar    bname[];
Xchar    fname[];
X{
X        register char *cp1;
X        register char *cp2;
X
X        cp1 = &fname[0];
X        while (*cp1 != 0)
X                ++cp1;
X
X#if     AMIGA
X        while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='/')
X                --cp1;
X#endif
X#if     VMS
X        while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!=']')
X                --cp1;
X#endif
X#if     CPM
X        while (cp1!=&fname[0] && cp1[-1]!=':')
X                --cp1;
X#endif
X#if     MSDOS
X        while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\'&&cp1[-1]!='/')
X                --cp1;
X#endif
X#if     ST520
X        while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\')
X                --cp1;
X#endif
X#if     FINDER
X        while (cp1!=&fname[0] && cp1[-1]!=':' && cp1[-1]!='\\'&&cp1[-1]!='/')
X                --cp1;
X#endif
X#if     V7 | USG | BSD
X        while (cp1!=&fname[0] && cp1[-1]!='/')
X                --cp1;
X#endif
X        cp2 = &bname[0];
X        while (cp2!=&bname[NBUFN-1] && *cp1!=0 && *cp1!=';')
X                *cp2++ = *cp1++;
X        *cp2 = 0;
X}
X
Xunqname(name)    /* make sure a buffer name is unique */
X
Xchar *name;    /* name to check on */
X
X{
X    register char *sp;
X
X    /* check to see if it is in the buffer list */
X    while (bfind(name, 0, FALSE) != NULL) {
X
X        /* go to the end of the name */
X        sp = name;
X        while (*sp)
X            ++sp;
X        if (sp == name || (*(sp-1) <'0' || *(sp-1) > '8')) {
X            *sp++ = '0';
X            *sp = 0;
X        } else
X            *(--sp) += 1;
X    }
X}
X
X/*
X * Ask for a file name, and write the
X * contents of the current buffer to that file.
X * Update the remembered file name and clear the
X * buffer changed flag. This handling of file names
X * is different from the earlier versions, and
X * is more compatable with Gosling EMACS than
X * with ITS EMACS. Bound to "C-X C-W".
X */
Xfilewrite(f, n)
X{
X        register WINDOW *wp;
X        register int    s;
X        char            fname[NFILEN];
X
X    if (restflag)        /* don't allow this command if restricted */
X        return(resterr());
X        if ((s=mlreply("Write file: ", fname, NFILEN)) != TRUE)
X                return (s);
X        if ((s=writeout(fname)) == TRUE) {
X                strcpy(curbp->b_fname, fname);
X                curbp->b_flag &= ~BFCHG;
X                wp = wheadp;                    /* Update mode lines.   */
X                while (wp != NULL) {
X                        if (wp->w_bufp == curbp)
X                                wp->w_flag |= WFMODE;
X                        wp = wp->w_wndp;
X                }
X        }
X        return (s);
X}
X
X/*
X * Save the contents of the current
X * buffer in its associatd file. No nothing
X * if nothing has changed (this may be a bug, not a
X * feature). Error if there is no remembered file
X * name for the buffer. Bound to "C-X C-S". May
X * get called by "C-Z".
X */
Xfilesave(f, n)
X{
X        register WINDOW *wp;
X        register int    s;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if ((curbp->b_flag&BFCHG) == 0)         /* Return, no changes.  */
X                return (TRUE);
X        if (curbp->b_fname[0] == 0) {           /* Must have a name.    */
X                mlwrite("No file name");
X                return (FALSE);
X        }
X
X    /* complain about truncated files */
X    if ((curbp->b_flag&BFTRUNC) != 0) {
X        if (mlyesno("Truncated file..write it out") == FALSE) {
X            mlwrite("[Aborted]");
X            return(FALSE);
X        }
X    }
X
X        if ((s=writeout(curbp->b_fname)) == TRUE) {
X                curbp->b_flag &= ~BFCHG;
X                wp = wheadp;                    /* Update mode lines.   */
X                while (wp != NULL) {
X                        if (wp->w_bufp == curbp)
X                                wp->w_flag |= WFMODE;
X                        wp = wp->w_wndp;
X                }
X        }
X        return (s);
X}
X
X/*
X * This function performs the details of file
X * writing. Uses the file management routines in the
X * "fileio.c" package. The number of lines written is
X * displayed. Sadly, it looks inside a LINE; provide
X * a macro for this. Most of the grief is error
X * checking of some sort.
X */
Xwriteout(fn)
Xchar    *fn;
X{
X        register int    s;
X        register LINE   *lp;
X        register int    nline;
X
X#if    CRYPT
X    s = resetkey();
X    if (s != TRUE)
X        return(s);
X#endif
X    /* turn off ALL keyboard translation in case we get a dos error */
X    TTkclose();
X
X        if ((s=ffwopen(fn)) != FIOSUC) {        /* Open writes message. */
X        TTkopen();
X                return (FALSE);
X        }
X    mlwrite("[Writing...]");        /* tell us were writing */
X        lp = lforw(curbp->b_linep);             /* First line.          */
X        nline = 0;                              /* Number of lines.     */
X        while (lp != curbp->b_linep) {
X                if ((s=ffputline(&lp->l_text[0], llength(lp))) != FIOSUC)
X                        break;
X                ++nline;
X                lp = lforw(lp);
X        }
X        if (s == FIOSUC) {                      /* No write error.      */
X                s = ffclose();
X                if (s == FIOSUC) {              /* No close error.      */
X                        if (nline == 1)
X                                mlwrite("[Wrote 1 line]");
X                        else
X                                mlwrite("[Wrote %d lines]", nline);
X                }
X        } else                                  /* Ignore close error   */
X                ffclose();                      /* if a write error.    */
X    TTkopen();
X        if (s != FIOSUC)                        /* Some sort of error.  */
X                return (FALSE);
X        return (TRUE);
X}
X
X/*
X * The command allows the user
X * to modify the file name associated with
X * the current buffer. It is like the "f" command
X * in UNIX "ed". The operation is simple; just zap
X * the name in the BUFFER structure, and mark the windows
X * as needing an update. You can type a blank line at the
X * prompt if you wish.
X */
Xfilename(f, n)
X{
X        register WINDOW *wp;
X        register int    s;
X        char            fname[NFILEN];
X
X    if (restflag)        /* don't allow this command if restricted */
X        return(resterr());
X        if ((s=mlreply("Name: ", fname, NFILEN)) == ABORT)
X                return (s);
X        if (s == FALSE)
X                strcpy(curbp->b_fname, "");
X        else
X                strcpy(curbp->b_fname, fname);
X        wp = wheadp;                            /* Update mode lines.   */
X        while (wp != NULL) {
X                if (wp->w_bufp == curbp)
X                        wp->w_flag |= WFMODE;
X                wp = wp->w_wndp;
X        }
X    curbp->b_mode &= ~MDVIEW;    /* no longer read only mode */
X        return (TRUE);
X}
X
X/*
X * Insert file "fname" into the current
X * buffer, Called by insert file command. Return the final
X * status of the read.
X */
Xifile(fname)
Xchar    fname[];
X{
X        register LINE   *lp0;
X        register LINE   *lp1;
X        register LINE   *lp2;
X        register int    i;
X        register BUFFER *bp;
X        register int    s;
X        register int    nbytes;
X        register int    nline;
X    int        lflag;        /* any lines longer than allowed? */
X    char mesg[NSTRING];
X
X        bp = curbp;                             /* Cheap.               */
X        bp->b_flag |= BFCHG;            /* we have changed    */
X    bp->b_flag &= ~BFINVS;            /* and are not temporary*/
X        if ((s=ffropen(fname)) == FIOERR)       /* Hard file open.      */
X                goto out;
X        if (s == FIOFNF) {                      /* File not found.      */
X                mlwrite("[No such file]");
X        return(FALSE);
X        }
X        mlwrite("[Inserting file]");
X
X#if    CRYPT
X    s = resetkey();
X    if (s != TRUE)
X        return(s);
X#endif
X    /* back up a line and save the mark here */
X    curwp->w_dotp = lback(curwp->w_dotp);
X    curwp->w_doto = 0;
X    curwp->w_markp = curwp->w_dotp;
X    curwp->w_marko = 0;
X
X        nline = 0;
X    lflag = FALSE;
X        while ((s=ffgetline()) == FIOSUC) {
X                nbytes = strlen(fline);
X                if ((lp1=lalloc(nbytes)) == NULL) {
X                        s = FIOMEM;             /* Keep message on the  */
X                        break;                  /* display.             */
X                }
X        lp0 = curwp->w_dotp;    /* line previous to insert */
X        lp2 = lp0->l_fp;    /* line after insert */
X
X        /* re-link new line between lp0 and lp2 */
X        lp2->l_bp = lp1;
X        lp0->l_fp = lp1;
X        lp1->l_bp = lp0;
X        lp1->l_fp = lp2;
X
X        /* and advance and write out the current line */
X        curwp->w_dotp = lp1;
X                for (i=0; i<nbytes; ++i)
X                        lputc(lp1, i, fline[i]);
X                ++nline;
X        }
X        ffclose();                              /* Ignore errors.       */
X    curwp->w_markp = lforw(curwp->w_markp);
X    strcpy(mesg, "[");
X    if (s==FIOERR) {
X        strcat(mesg, "I/O ERROR, ");
X        curbp->b_flag |= BFTRUNC;
X    }
X    if (s == FIOMEM) {
X        strcat(mesg, "OUT OF MEMORY, ");
X        curbp->b_flag |= BFTRUNC;
X    }
X    sprintf(&mesg[strlen(mesg)], "Inserted %d line", nline);
X        if (nline > 1)
X        strcat(mesg, "s");
X    strcat(mesg, "]");
X    mlwrite(mesg);
X
Xout:
X    /* advance to the next line and mark the window for changes */
X    curwp->w_dotp = lforw(curwp->w_dotp);
X    curwp->w_flag |= WFHARD | WFMODE;
X
X    /* copy window parameters back to the buffer structure */
X    curbp->b_dotp = curwp->w_dotp;
X    curbp->b_doto = curwp->w_doto;
X    curbp->b_markp = curwp->w_markp;
X    curbp->b_marko = curwp->w_marko;
X
X        if (s == FIOERR)                        /* False if error.      */
X                return (FALSE);
X        return (TRUE);
X}
FRIDAY_NIGHT
echo mes.5 completed!
# That's all folks!