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/*-
* 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_replace.c 8.12 (Berkeley) 12/9/93";
#endif /* not lint */
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "vi.h"
#include "vcmd.h"
/*
* v_replace -- [count]rc
* The r command in historic vi was almost beautiful in its badness.
* For example, "r<erase>" and "r<word erase>" beeped the terminal
* and deleted a single character. "Nr<carriage return>", where N
* was greater than 1, inserted a single carriage return. This may
* not be right, but at least it's not insane.
*/
int
v_replace(sp, ep, vp, fm, tm, rp)
SCR *sp;
EXF *ep;
VICMDARG *vp;
MARK *fm, *tm, *rp;
{
CH ikey;
TEXT *tp;
recno_t lno;
size_t blen, len;
u_long cnt;
int rval;
char *bp, *p;
/*
* If the line doesn't exist, or it's empty, replacement isn't
* allowed. It's not hard to implement, but:
*
* 1: It's historic practice.
* 2: For consistency, this change would require that the more
* general case, "Nr", when the user is < N characters from
* the end of the line, also work.
* 3: Replacing a newline has somewhat odd semantics.
*/
if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
if (file_lline(sp, ep, &lno))
return (1);
if (lno != 0) {
GETLINE_ERR(sp, fm->lno);
return (1);
}
goto nochar;
}
if (len == 0) {
nochar: msgq(sp, M_BERR, "No characters to replace");
return (1);
}
/*
* Figure out how many characters to be replace; for no particular
* reason other than that the semantics of replacing the newline
* are confusing, only permit the replacement of the characters in
* the current line. I suppose we could simply append the replacement
* characters to the line, but I see no compelling reason to do so.
*/
cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
rp->cno = fm->cno + cnt - 1;
if (rp->cno > len - 1) {
v_eol(sp, ep, fm);
return (1);
}
/* Get the character, literal escapes, escape terminates. */
if (F_ISSET(vp, VC_ISDOT)) {
ikey.ch = VIP(sp)->rlast;
ikey.value = term_key_val(sp, ikey.ch);
} else {
if (term_key(sp, &ikey, 0) != INP_OK)
return (1);
switch (ikey.value) {
case K_ESCAPE:
*rp = *fm;
return (0);
case K_VLNEXT:
if (term_key(sp, &ikey, 0) != INP_OK)
return (1);
break;
}
VIP(sp)->rlast = ikey.ch;
}
/* Copy the line. */
GET_SPACE_RET(sp, bp, blen, len);
memmove(bp, p, len);
p = bp;
if (ikey.value == K_CR || ikey.value == K_NL) {
/* Set return line. */
rp->lno = fm->lno + cnt;
/* The first part of the current line. */
if (file_sline(sp, ep, fm->lno, p, fm->cno))
goto err_ret;
/*
* The rest of the current line. And, of course, now it gets
* tricky. Any white space after the replaced character is
* stripped, and autoindent is applied. Put the cursor on the
* last indent character as did historic vi.
*/
for (p += fm->cno + cnt, len -= fm->cno + cnt;
len && isblank(*p); --len, ++p);
if ((tp = text_init(sp, p, len, len)) == NULL)
goto err_ret;
if (txt_auto(sp, ep, fm->lno, NULL, 0, tp))
goto err_ret;
rp->cno = tp->ai ? tp->ai - 1 : 0;
if (file_aline(sp, ep, 1, fm->lno, tp->lb, tp->len))
goto err_ret;
text_free(tp);
rval = 0;
/* All of the middle lines. */
while (--cnt)
if (file_aline(sp, ep, 1, fm->lno, "", 0)) {
err_ret: rval = 1;
break;
}
} else {
memset(bp + fm->cno, ikey.ch, cnt);
rval = file_sline(sp, ep, fm->lno, bp, len);
rp->lno = fm->lno;
rp->cno = fm->cno + cnt - 1;
}
FREE_SPACE(sp, bp, blen);
return (rval);
}
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