mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-05 03:39:02 +00:00
b8ba871bd9
files, curses, db, regex etc that we already have). The other glue will follow shortly. Obtained from: Keith Bostic <bostic@bostic.com>
178 lines
4.6 KiB
C
178 lines
4.6 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
* Copyright (c) 1992, 1993, 1994, 1995, 1996
|
|
* Keith Bostic. All rights reserved.
|
|
*
|
|
* See the LICENSE file for redistribution information.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)ex_join.c 10.10 (Berkeley) 9/15/96";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/queue.h>
|
|
|
|
#include <bitstring.h>
|
|
#include <ctype.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "../common/common.h"
|
|
|
|
/*
|
|
* ex_join -- :[line [,line]] j[oin][!] [count] [flags]
|
|
* Join lines.
|
|
*
|
|
* PUBLIC: int ex_join __P((SCR *, EXCMD *));
|
|
*/
|
|
int
|
|
ex_join(sp, cmdp)
|
|
SCR *sp;
|
|
EXCMD *cmdp;
|
|
{
|
|
recno_t from, to;
|
|
size_t blen, clen, len, tlen;
|
|
int echar, extra, first;
|
|
char *bp, *p, *tbp;
|
|
|
|
NEEDFILE(sp, cmdp);
|
|
|
|
from = cmdp->addr1.lno;
|
|
to = cmdp->addr2.lno;
|
|
|
|
/* Check for no lines to join. */
|
|
if (!db_exist(sp, from + 1)) {
|
|
msgq(sp, M_ERR, "131|No following lines to join");
|
|
return (1);
|
|
}
|
|
|
|
GET_SPACE_RET(sp, bp, blen, 256);
|
|
|
|
/*
|
|
* The count for the join command was off-by-one,
|
|
* historically, to other counts for other commands.
|
|
*/
|
|
if (FL_ISSET(cmdp->iflags, E_C_COUNT))
|
|
++cmdp->addr2.lno;
|
|
|
|
/*
|
|
* If only a single address specified, or, the same address
|
|
* specified twice, the from/two addresses will be the same.
|
|
*/
|
|
if (cmdp->addr1.lno == cmdp->addr2.lno)
|
|
++cmdp->addr2.lno;
|
|
|
|
clen = tlen = 0;
|
|
for (first = 1,
|
|
from = cmdp->addr1.lno, to = cmdp->addr2.lno; from <= to; ++from) {
|
|
/*
|
|
* Get next line. Historic versions of vi allowed "10J" while
|
|
* less than 10 lines from the end-of-file, so we do too.
|
|
*/
|
|
if (db_get(sp, from, 0, &p, &len)) {
|
|
cmdp->addr2.lno = from - 1;
|
|
break;
|
|
}
|
|
|
|
/* Empty lines just go away. */
|
|
if (len == 0)
|
|
continue;
|
|
|
|
/*
|
|
* Get more space if necessary. Note, tlen isn't the length
|
|
* of the new line, it's roughly the amount of space needed.
|
|
* tbp - bp is the length of the new line.
|
|
*/
|
|
tlen += len + 2;
|
|
ADD_SPACE_RET(sp, bp, blen, tlen);
|
|
tbp = bp + clen;
|
|
|
|
/*
|
|
* Historic practice:
|
|
*
|
|
* If force specified, join without modification.
|
|
* If the current line ends with whitespace, strip leading
|
|
* whitespace from the joined line.
|
|
* If the next line starts with a ), do nothing.
|
|
* If the current line ends with ., insert two spaces.
|
|
* Else, insert one space.
|
|
*
|
|
* One change -- add ? and ! to the list of characters for
|
|
* which we insert two spaces. I expect that POSIX 1003.2
|
|
* will require this as well.
|
|
*
|
|
* Echar is the last character in the last line joined.
|
|
*/
|
|
extra = 0;
|
|
if (!first && !FL_ISSET(cmdp->iflags, E_C_FORCE)) {
|
|
if (isblank(echar))
|
|
for (; len && isblank(*p); --len, ++p);
|
|
else if (p[0] != ')') {
|
|
if (strchr(".?!", echar)) {
|
|
*tbp++ = ' ';
|
|
++clen;
|
|
extra = 1;
|
|
}
|
|
*tbp++ = ' ';
|
|
++clen;
|
|
for (; len && isblank(*p); --len, ++p);
|
|
}
|
|
}
|
|
|
|
if (len != 0) {
|
|
memcpy(tbp, p, len);
|
|
tbp += len;
|
|
clen += len;
|
|
echar = p[len - 1];
|
|
} else
|
|
echar = ' ';
|
|
|
|
/*
|
|
* Historic practice for vi was to put the cursor at the first
|
|
* inserted whitespace character, if there was one, or the
|
|
* first character of the joined line, if there wasn't, or the
|
|
* last character of the line if joined to an empty line. If
|
|
* a count was specified, the cursor was moved as described
|
|
* for the first line joined, ignoring subsequent lines. If
|
|
* the join was a ':' command, the cursor was placed at the
|
|
* first non-blank character of the line unless the cursor was
|
|
* "attracted" to the end of line when the command was executed
|
|
* in which case it moved to the new end of line. There are
|
|
* probably several more special cases, but frankly, my dear,
|
|
* I don't give a damn. This implementation puts the cursor
|
|
* on the first inserted whitespace character, the first
|
|
* character of the joined line, or the last character of the
|
|
* line regardless. Note, if the cursor isn't on the joined
|
|
* line (possible with : commands), it is reset to the starting
|
|
* line.
|
|
*/
|
|
if (first) {
|
|
sp->cno = (tbp - bp) - (1 + extra);
|
|
first = 0;
|
|
} else
|
|
sp->cno = (tbp - bp) - len - (1 + extra);
|
|
}
|
|
sp->lno = cmdp->addr1.lno;
|
|
|
|
/* Delete the joined lines. */
|
|
for (from = cmdp->addr1.lno, to = cmdp->addr2.lno; to > from; --to)
|
|
if (db_delete(sp, to))
|
|
goto err;
|
|
|
|
/* If the original line changed, reset it. */
|
|
if (!first && db_set(sp, from, bp, tbp - bp)) {
|
|
err: FREE_SPACE(sp, bp, blen);
|
|
return (1);
|
|
}
|
|
FREE_SPACE(sp, bp, blen);
|
|
|
|
sp->rptlines[L_JOINED] += (cmdp->addr2.lno - cmdp->addr1.lno) + 1;
|
|
return (0);
|
|
}
|