usr.bin/vi/nex/ex_append.c

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)ex_append.c 8.6 (Berkeley) 11/23/93";
#endif /* not lint */

#include <sys/types.h>

#include "vi.h"
#include "excmd.h"

enum which {APPEND, CHANGE, INSERT};

static int aci __P((SCR *, EXF *, EXCMDARG *, enum which));

/*
 * ex_append -- :[line] a[ppend][!]
 *      Append one or more lines of new text after the specified line,
 *      or the current line if no address is specified.
 */
int
ex_append(sp, ep, cmdp)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
{
        return (aci(sp, ep, cmdp, APPEND));
}

/*
 * ex_change -- :[line[,line]] c[hange][!] [count]
 *      Change one or more lines to the input text.
 */
int
ex_change(sp, ep, cmdp)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
{
        return (aci(sp, ep, cmdp, CHANGE));
}

/*
 * ex_insert -- :[line] i[nsert][!]
 *      Insert one or more lines of new text before the specified line,
 *      or the current line if no address is specified.
 */
int
ex_insert(sp, ep, cmdp)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
{
        return (aci(sp, ep, cmdp, INSERT));
}

static int
aci(sp, ep, cmdp, cmd)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
        enum which cmd;
{
        MARK m;
        TEXT *tp;
        recno_t cnt;
        int rval, aiset;

        /*
         * The ! flag turns off autoindent for append, change and
         * insert.
         */
        if (F_ISSET(cmdp, E_FORCE)) {
                aiset = O_ISSET(sp, O_AUTOINDENT);
                O_CLR(sp, O_AUTOINDENT);
        } else
                aiset = 0;

        /*
         * If doing a change, replace lines as long as possible.
         * Then, append more lines or delete remaining lines.
         * Inserts are the same as appends to the previous line.
         */
        rval = 0;
        m = cmdp->addr1;
        if (cmd == INSERT) {
                --m.lno;
                cmd = APPEND;
        }
        if (cmd == CHANGE)
                for (;; ++m.lno) {
                        if (m.lno > cmdp->addr2.lno) {
                                cmd = APPEND;
                                --m.lno;
                                break;
                        }
                        switch (sp->s_get(sp, ep, &sp->tiq, 0,
                            TXT_BEAUTIFY | TXT_CR | TXT_NLECHO)) {
                        case INP_OK:
                                break;
                        case INP_EOF:
                        case INP_ERR:
                                rval = 1;
                                goto done;
                        }
                        tp = sp->tiq.cqh_first;
                        if (tp->len == 1 && tp->lb[0] == '.') {
                                for (cnt =
                                    (cmdp->addr2.lno - m.lno) + 1; cnt--;)
                                        if (file_dline(sp, ep, m.lno)) {
                                                rval = 1;
                                                goto done;
                                        }
                                goto done;
                        }
                        if (file_sline(sp, ep, m.lno, tp->lb, tp->len)) {
                                rval = 1;
                                goto done;
                        }
                }

        if (cmd == APPEND)
                for (;; ++m.lno) {
                        switch (sp->s_get(sp, ep, &sp->tiq, 0,
                            TXT_BEAUTIFY | TXT_CR | TXT_NLECHO)) {
                        case INP_OK:
                                break;
                        case INP_EOF:
                        case INP_ERR:
                                rval = 1;
                                goto done;
                        }
                        tp = sp->tiq.cqh_first;
                        if (tp->len == 1 && tp->lb[0] == '.')
                                break;
                        if (file_aline(sp, ep, 1, m.lno, tp->lb, tp->len)) {
                                rval = 1;
                                goto done;
                        }
                }

done:   if (rval == 0)
                sp->lno = m.lno;

        if (aiset)
                O_SET(sp, O_AUTOINDENT);

        return (rval);
}