171 lines
4.5 KiB
C
171 lines
4.5 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "$Id: ex_join.c,v 10.17 2004/03/16 14:14:04 skimo Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../common/common.h"
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/*
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* ex_join -- :[line [,line]] j[oin][!] [count] [flags]
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* Join lines.
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*
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* PUBLIC: int ex_join(SCR *, EXCMD *);
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*/
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int
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ex_join(SCR *sp, EXCMD *cmdp)
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{
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recno_t from, to;
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size_t blen, clen, len, tlen;
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int echar = 0, extra, first;
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CHAR_T *bp, *tbp = NULL;
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CHAR_T *p;
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NEEDFILE(sp, cmdp);
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from = cmdp->addr1.lno;
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to = cmdp->addr2.lno;
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/* Check for no lines to join. */
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if (!db_exist(sp, from + 1)) {
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msgq(sp, M_ERR, "131|No following lines to join");
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return (1);
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}
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GET_SPACE_RETW(sp, bp, blen, 256);
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/*
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* The count for the join command was off-by-one,
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* historically, to other counts for other commands.
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*/
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if (F_ISSET(cmdp, E_ADDR_DEF) || cmdp->addrcnt == 1)
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++cmdp->addr2.lno;
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clen = tlen = 0;
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for (first = 1,
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from = cmdp->addr1.lno, to = cmdp->addr2.lno; from <= to; ++from) {
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/*
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* Get next line. Historic versions of vi allowed "10J" while
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* less than 10 lines from the end-of-file, so we do too.
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*/
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if (db_get(sp, from, 0, &p, &len)) {
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cmdp->addr2.lno = from - 1;
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break;
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}
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/* Empty lines just go away. */
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if (len == 0)
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continue;
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/*
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* Get more space if necessary. Note, tlen isn't the length
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* of the new line, it's roughly the amount of space needed.
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* tbp - bp is the length of the new line.
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*/
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tlen += len + 2;
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ADD_SPACE_RETW(sp, bp, blen, tlen);
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tbp = bp + clen;
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/*
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* Historic practice:
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*
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* If force specified, join without modification.
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* If the current line ends with whitespace, strip leading
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* whitespace from the joined line.
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* If the next line starts with a ), do nothing.
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* If the current line ends with ., insert two spaces.
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* Else, insert one space.
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*
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* One change -- add ? and ! to the list of characters for
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* which we insert two spaces. I expect that POSIX 1003.2
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* will require this as well.
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*
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* Echar is the last character in the last line joined.
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*/
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extra = 0;
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if (!first && !FL_ISSET(cmdp->iflags, E_C_FORCE)) {
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if (isblank(echar))
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for (; len && isblank(*p); --len, ++p);
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else if (p[0] != ')') {
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if (STRCHR(L(".?!"), echar)) {
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*tbp++ = ' ';
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++clen;
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extra = 1;
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}
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*tbp++ = ' ';
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++clen;
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for (; len && isblank(*p); --len, ++p);
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}
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}
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if (len != 0) {
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MEMCPY(tbp, p, len);
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tbp += len;
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clen += len;
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echar = p[len - 1];
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} else
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echar = ' ';
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/*
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* Historic practice for vi was to put the cursor at the first
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* inserted whitespace character, if there was one, or the
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* first character of the joined line, if there wasn't, or the
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* last character of the line if joined to an empty line. If
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* a count was specified, the cursor was moved as described
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* for the first line joined, ignoring subsequent lines. If
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* the join was a ':' command, the cursor was placed at the
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* first non-blank character of the line unless the cursor was
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* "attracted" to the end of line when the command was executed
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* in which case it moved to the new end of line. There are
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* probably several more special cases, but frankly, my dear,
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* I don't give a damn. This implementation puts the cursor
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* on the first inserted whitespace character, the first
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* character of the joined line, or the last character of the
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* line regardless. Note, if the cursor isn't on the joined
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* line (possible with : commands), it is reset to the starting
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* line.
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*/
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if (first) {
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sp->cno = (tbp - bp) - (1 + extra);
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first = 0;
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} else
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sp->cno = (tbp - bp) - len - (1 + extra);
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}
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sp->lno = cmdp->addr1.lno;
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/* Delete the joined lines. */
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for (from = cmdp->addr1.lno, to = cmdp->addr2.lno; to > from; --to)
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if (db_delete(sp, to))
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goto err;
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/* If the original line changed, reset it. */
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if (!first && db_set(sp, from, bp, tbp - bp)) {
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err: FREE_SPACEW(sp, bp, blen);
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return (1);
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}
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FREE_SPACEW(sp, bp, blen);
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sp->rptlines[L_JOINED] += (cmdp->addr2.lno - cmdp->addr1.lno) + 1;
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return (0);
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}
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