usr.bin/vi/nvi/v_ch.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[] = "@(#)v_ch.c      8.2 (Berkeley) 12/20/93";
#endif /* not lint */

#include <sys/types.h>

#include <stdlib.h>

#include "vi.h"
#include "vcmd.h"

#define NOPREV {                                                        \
        msgq(sp, M_BERR, "No previous F, f, T or t search.");           \
        return (1);                                                     \
}

#define NOTFOUND(ch) {                                                  \
        msgq(sp, M_BERR, "%s not found.", charname(sp, ch));            \
        return (1);                                                     \
}

/*
 * v_chrepeat -- [count];
 *      Repeat the last F, f, T or t search.
 */
int
v_chrepeat(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        vp->character = sp->lastckey;

        switch (sp->csearchdir) {
        case CNOTSET:
                NOPREV;
        case FSEARCH:
                return (v_chF(sp, ep, vp, fm, tm, rp));
        case fSEARCH:
                return (v_chf(sp, ep, vp, fm, tm, rp));
        case TSEARCH:
                return (v_chT(sp, ep, vp, fm, tm, rp));
        case tSEARCH:
                return (v_cht(sp, ep, vp, fm, tm, rp));
        default:
                abort();
        }
        /* NOTREACHED */
}

/*
 * v_chrrepeat -- [count],
 *      Repeat the last F, f, T or t search in the reverse direction.
 */
int
v_chrrepeat(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        int rval;
        enum cdirection savedir;

        vp->character = sp->lastckey;
        savedir = sp->csearchdir;

        switch (sp->csearchdir) {
        case CNOTSET:
                NOPREV;
        case FSEARCH:
                rval = v_chf(sp, ep, vp, fm, tm, rp);
                break;
        case fSEARCH:
                rval = v_chF(sp, ep, vp, fm, tm, rp);
                break;
        case TSEARCH:
                rval = v_cht(sp, ep, vp, fm, tm, rp);
                break;
        case tSEARCH:
                rval = v_chT(sp, ep, vp, fm, tm, rp);
                break;
        default:
                abort();
        }
        sp->csearchdir = savedir;
        return (rval);
}

/*
 * v_cht -- [count]tc
 *      Search forward in the line for the next occurrence of the character.
 *      Place the cursor on it if a motion command, to its left if its not.
 */
int
v_cht(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        int rval;

        rval = v_chf(sp, ep, vp, fm, tm, rp);
        if (!rval)
                --rp->cno;      /* XXX: Motion interaction with v_chf. */
        sp->csearchdir = tSEARCH;
        return (rval);
}

/*
 * v_chf -- [count]fc
 *      Search forward in the line for the next occurrence of the character.
 *      Place the cursor to its right if a motion command, on it if its not.
 */
int
v_chf(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        size_t len;
        recno_t lno;
        u_long cnt;
        int key;
        char *endp, *p, *startp;

        /*
         * !!!
         * If it's a dot command, it doesn't reset the key for which
         * we're searching, e.g. in "df1|f2|.|;", the ';' searches
         * for a '2'.
         */
        key = vp->character;
        if (!F_ISSET(vp, VC_ISDOT))
                sp->lastckey = key;
        sp->csearchdir = fSEARCH;

        if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
                if (file_lline(sp, ep, &lno))
                        return (1);
                if (lno == 0)
                        NOTFOUND(key);
                GETLINE_ERR(sp, fm->lno);
                return (1);
        }

        if (len == 0)
                NOTFOUND(key);

        startp = p;
        endp = p + len;
        p += fm->cno;
        for (cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt--;) {
                while (++p < endp && *p != key);
                if (p == endp)
                        NOTFOUND(key);
        }
        rp->lno = fm->lno;
        rp->cno = p - startp;
        if (F_ISSET(vp, VC_C | VC_D | VC_Y))
                ++rp->cno;
        return (0);
}

/*
 * v_chT -- [count]Tc
 *      Search backward in the line for the next occurrence of the character.
 *      Place the cursor to its right.
 */
int
v_chT(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        int rval;

        rval = v_chF(sp, ep, vp, fm, tm, rp);
        if (!rval)
                ++rp->cno;
        sp->csearchdir = TSEARCH;
        return (0);
}

/*
 * v_chF -- [count]Fc
 *      Search backward in the line for the next occurrence of the character.
 *      Place the cursor on it.
 */
int
v_chF(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        recno_t lno;
        size_t len;
        u_long cnt;
        int key;
        char *p, *endp;

        /*
         * !!!
         * If it's a dot command, it doesn't reset the key for which
         * we're searching, e.g. in "df1|f2|.|;", the ';' searches
         * for a '2'.
         */
        key = vp->character;
        if (!F_ISSET(vp, VC_ISDOT))
                sp->lastckey = key;
        sp->csearchdir = FSEARCH;

        if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
                if (file_lline(sp, ep, &lno))
                        return (1);
                if (lno == 0)
                        NOTFOUND(key);
                GETLINE_ERR(sp, fm->lno);
                return (1);
        }

        if (len == 0)
                NOTFOUND(key);

        endp = p - 1;
        p += fm->cno;
        for (cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt--;) {
                while (--p > endp && *p != key);
                if (p == endp)
                        NOTFOUND(key);
        }
        rp->lno = fm->lno;
        rp->cno = (p - endp) - 1;
        return (0);
}