516 lines
13 KiB
C
516 lines
13 KiB
C
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/*-
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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[] = "@(#)v_search.c 10.18 (Berkeley) 9/19/96";
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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 <errno.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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#include "vi.h"
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static int v_exaddr __P((SCR *, VICMD *, dir_t));
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static int v_search __P((SCR *, VICMD *, char *, size_t, u_int, dir_t));
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/*
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* v_srch -- [count]?RE[? offset]
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* Ex address search backward.
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*
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* PUBLIC: int v_searchb __P((SCR *, VICMD *));
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*/
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int
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v_searchb(sp, vp)
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SCR *sp;
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VICMD *vp;
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{
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return (v_exaddr(sp, vp, BACKWARD));
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}
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/*
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* v_searchf -- [count]/RE[/ offset]
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* Ex address search forward.
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*
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* PUBLIC: int v_searchf __P((SCR *, VICMD *));
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*/
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int
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v_searchf(sp, vp)
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SCR *sp;
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VICMD *vp;
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{
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return (v_exaddr(sp, vp, FORWARD));
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}
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/*
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* v_exaddr --
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* Do a vi search (which is really an ex address).
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*/
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static int
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v_exaddr(sp, vp, dir)
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SCR *sp;
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VICMD *vp;
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dir_t dir;
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{
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static EXCMDLIST fake = { "search" };
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EXCMD *cmdp;
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GS *gp;
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TEXT *tp;
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recno_t s_lno;
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size_t len, s_cno, tlen;
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int err, nb, type;
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char *cmd, *t, buf[20];
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/*
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* !!!
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* If using the search command as a motion, any addressing components
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* are lost, i.e. y/ptrn/+2, when repeated, is the same as y/ptrn/.
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*/
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if (F_ISSET(vp, VC_ISDOT))
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return (v_search(sp, vp,
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NULL, 0, SEARCH_PARSE | SEARCH_MSG | SEARCH_SET, dir));
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/* Get the search pattern. */
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if (v_tcmd(sp, vp, dir == BACKWARD ? CH_BSEARCH : CH_FSEARCH,
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TXT_BS | TXT_CR | TXT_ESCAPE | TXT_PROMPT |
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(O_ISSET(sp, O_SEARCHINCR) ? TXT_SEARCHINCR : 0)))
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return (1);
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tp = sp->tiq.cqh_first;
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/* If the user backspaced over the prompt, do nothing. */
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if (tp->term == TERM_BS)
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return (1);
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/*
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* If the user was doing an incremental search, then we've already
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* updated the cursor and moved to the right location. Return the
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* correct values, we're done.
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*/
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if (tp->term == TERM_SEARCH) {
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vp->m_stop.lno = sp->lno;
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vp->m_stop.cno = sp->cno;
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if (ISMOTION(vp))
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return (v_correct(sp, vp, 0));
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vp->m_final = vp->m_stop;
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return (0);
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}
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/*
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* If the user entered <escape> or <carriage-return>, the length is
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* 1 and the right thing will happen, i.e. the prompt will be used
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* as a command character.
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*
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* Build a fake ex command structure.
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*/
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gp = sp->gp;
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gp->excmd.cp = tp->lb;
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gp->excmd.clen = tp->len;
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F_INIT(&gp->excmd, E_VISEARCH);
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/*
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* XXX
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* Warn if the search wraps. This is a pretty special case, but it's
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* nice feature that wasn't in the original implementations of ex/vi.
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* (It was added at some point to System V's version.) This message
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* is only displayed if there are no keys in the queue. The problem is
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* the command is going to succeed, and the message is informational,
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* not an error. If a macro displays it repeatedly, e.g., the pattern
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* only occurs once in the file and wrapscan is set, you lose big. For
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* example, if the macro does something like:
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*
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* :map K /pattern/^MjK
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*
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* Each search will display the message, but the following "/pattern/"
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* will immediately overwrite it, with strange results. The System V
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* vi displays the "wrapped" message multiple times, but because it's
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* overwritten each time, it's not as noticeable. As we don't discard
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* messages, it's a real problem for us.
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*/
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if (!KEYS_WAITING(sp))
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F_SET(&gp->excmd, E_SEARCH_WMSG);
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/* Save the current line/column. */
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s_lno = sp->lno;
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s_cno = sp->cno;
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/*
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* !!!
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* Historically, vi / and ? commands were full-blown ex addresses,
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* including ';' delimiters, trailing <blank>'s, multiple search
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* strings (separated by semi-colons) and, finally, full-blown z
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* commands after the / and ? search strings. (If the search was
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* being used as a motion, the trailing z command was ignored.
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* Also, we do some argument checking on the z command, to be sure
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* that it's not some other random command.) For multiple search
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* strings, leading <blank>'s at the second and subsequent strings
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* were eaten as well. This has some (unintended?) side-effects:
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* the command /ptrn/;3 is legal and results in moving to line 3.
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* I suppose you could use it to optionally move to line 3...
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*
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* !!!
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* Historically, if any part of the search command failed, the cursor
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* remained unmodified (even if ; was used). We have to play games
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* because the underlying ex parser thinks we're modifying the cursor
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* as we go, but I think we're compatible with historic practice.
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*
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* !!!
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* Historically, the command "/STRING/; " failed, apparently it
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* confused the parser. We're not that compatible.
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*/
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cmdp = &gp->excmd;
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if (ex_range(sp, cmdp, &err))
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return (1);
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/*
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* Remember where any remaining command information is, and clean
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* up the fake ex command.
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*/
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cmd = cmdp->cp;
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len = cmdp->clen;
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gp->excmd.clen = 0;
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if (err)
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goto err2;
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/* Copy out the new cursor position and make sure it's okay. */
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switch (cmdp->addrcnt) {
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case 1:
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vp->m_stop = cmdp->addr1;
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break;
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case 2:
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vp->m_stop = cmdp->addr2;
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break;
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}
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if (!db_exist(sp, vp->m_stop.lno)) {
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ex_badaddr(sp, &fake,
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vp->m_stop.lno == 0 ? A_ZERO : A_EOF, NUM_OK);
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goto err2;
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}
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/*
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* !!!
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* Historic practice is that a trailing 'z' was ignored if it was a
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* motion command. Should probably be an error, but not worth the
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* effort.
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*/
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if (ISMOTION(vp))
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return (v_correct(sp, vp, F_ISSET(cmdp, E_DELTA)));
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/*
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* !!!
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* Historically, if it wasn't a motion command, a delta in the search
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* pattern turns it into a first nonblank movement.
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*/
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nb = F_ISSET(cmdp, E_DELTA);
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/* Check for the 'z' command. */
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if (len != 0) {
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if (*cmd != 'z')
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goto err1;
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/* No blanks, just like the z command. */
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for (t = cmd + 1, tlen = len - 1; tlen > 0; ++t, --tlen)
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if (!isdigit(*t))
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break;
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if (tlen &&
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(*t == '-' || *t == '.' || *t == '+' || *t == '^')) {
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++t;
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--tlen;
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type = 1;
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} else
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type = 0;
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if (tlen)
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goto err1;
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/* The z command will do the nonblank for us. */
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nb = 0;
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/* Default to z+. */
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if (!type &&
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v_event_push(sp, NULL, "+", 1, CH_NOMAP | CH_QUOTED))
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return (1);
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/* Push the user's command. */
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if (v_event_push(sp, NULL, cmd, len, CH_NOMAP | CH_QUOTED))
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return (1);
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/* Push line number so get correct z display. */
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tlen = snprintf(buf,
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sizeof(buf), "%lu", (u_long)vp->m_stop.lno);
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if (v_event_push(sp, NULL, buf, tlen, CH_NOMAP | CH_QUOTED))
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return (1);
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/* Don't refresh until after 'z' happens. */
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F_SET(VIP(sp), VIP_S_REFRESH);
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}
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/* Non-motion commands move to the end of the range. */
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vp->m_final = vp->m_stop;
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if (nb) {
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F_CLR(vp, VM_RCM_MASK);
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F_SET(vp, VM_RCM_SETFNB);
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}
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return (0);
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err1: msgq(sp, M_ERR,
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"188|Characters after search string, line offset and/or z command");
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err2: vp->m_final.lno = s_lno;
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vp->m_final.cno = s_cno;
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return (1);
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}
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/*
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* v_searchN -- N
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* Reverse last search.
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*
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* PUBLIC: int v_searchN __P((SCR *, VICMD *));
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*/
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int
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v_searchN(sp, vp)
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SCR *sp;
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VICMD *vp;
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{
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dir_t dir;
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switch (sp->searchdir) {
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case BACKWARD:
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dir = FORWARD;
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break;
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case FORWARD:
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dir = BACKWARD;
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break;
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default:
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dir = sp->searchdir;
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break;
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}
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return (v_search(sp, vp, NULL, 0, SEARCH_PARSE, dir));
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}
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/*
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* v_searchn -- n
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* Repeat last search.
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*
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* PUBLIC: int v_searchn __P((SCR *, VICMD *));
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*/
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int
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v_searchn(sp, vp)
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SCR *sp;
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VICMD *vp;
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{
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return (v_search(sp, vp, NULL, 0, SEARCH_PARSE, sp->searchdir));
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}
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/*
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* v_searchw -- [count]^A
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* Search for the word under the cursor.
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*
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* PUBLIC: int v_searchw __P((SCR *, VICMD *));
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*/
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int
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v_searchw(sp, vp)
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SCR *sp;
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VICMD *vp;
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{
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size_t blen, len;
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int rval;
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char *bp;
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len = VIP(sp)->klen + sizeof(RE_WSTART) + sizeof(RE_WSTOP);
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GET_SPACE_RET(sp, bp, blen, len);
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len = snprintf(bp, blen, "%s%s%s", RE_WSTART, VIP(sp)->keyw, RE_WSTOP);
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rval = v_search(sp, vp, bp, len, SEARCH_SET, FORWARD);
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FREE_SPACE(sp, bp, blen);
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return (rval);
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}
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/*
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* v_search --
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* The search commands.
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*/
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static int
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v_search(sp, vp, ptrn, plen, flags, dir)
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SCR *sp;
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VICMD *vp;
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u_int flags;
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char *ptrn;
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size_t plen;
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dir_t dir;
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{
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/* Display messages. */
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LF_SET(SEARCH_MSG);
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/* If it's a motion search, offset past end-of-line is okay. */
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if (ISMOTION(vp))
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LF_SET(SEARCH_EOL);
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/*
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* XXX
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* Warn if the search wraps. See the comment above, in v_exaddr().
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*/
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if (!KEYS_WAITING(sp))
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LF_SET(SEARCH_WMSG);
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switch (dir) {
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case BACKWARD:
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if (b_search(sp,
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&vp->m_start, &vp->m_stop, ptrn, plen, NULL, flags))
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return (1);
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break;
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case FORWARD:
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if (f_search(sp,
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&vp->m_start, &vp->m_stop, ptrn, plen, NULL, flags))
|
||
|
|
return (1);
|
||
|
|
break;
|
||
|
|
case NOTSET:
|
||
|
|
msgq(sp, M_ERR, "189|No previous search pattern");
|
||
|
|
return (1);
|
||
|
|
default:
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Correct motion commands, otherwise, simply move to the location. */
|
||
|
|
if (ISMOTION(vp)) {
|
||
|
|
if (v_correct(sp, vp, 0))
|
||
|
|
return(1);
|
||
|
|
} else
|
||
|
|
vp->m_final = vp->m_stop;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* v_correct --
|
||
|
|
* Handle command with a search as the motion.
|
||
|
|
*
|
||
|
|
* !!!
|
||
|
|
* Historically, commands didn't affect the line searched to/from if the
|
||
|
|
* motion command was a search and the final position was the start/end
|
||
|
|
* of the line. There were some special cases and vi was not consistent;
|
||
|
|
* it was fairly easy to confuse it. For example, given the two lines:
|
||
|
|
*
|
||
|
|
* abcdefghi
|
||
|
|
* ABCDEFGHI
|
||
|
|
*
|
||
|
|
* placing the cursor on the 'A' and doing y?$ would so confuse it that 'h'
|
||
|
|
* 'k' and put would no longer work correctly. In any case, we try to do
|
||
|
|
* the right thing, but it's not going to exactly match historic practice.
|
||
|
|
*
|
||
|
|
* PUBLIC: int v_correct __P((SCR *, VICMD *, int));
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
v_correct(sp, vp, isdelta)
|
||
|
|
SCR *sp;
|
||
|
|
VICMD *vp;
|
||
|
|
int isdelta;
|
||
|
|
{
|
||
|
|
dir_t dir;
|
||
|
|
MARK m;
|
||
|
|
size_t len;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* We may have wrapped if wrapscan was set, and we may have returned
|
||
|
|
* to the position where the cursor started. Historic vi didn't cope
|
||
|
|
* with this well. Yank wouldn't beep, but the first put after the
|
||
|
|
* yank would move the cursor right one column (without adding any
|
||
|
|
* text) and the second would put a copy of the current line. The
|
||
|
|
* change and delete commands would beep, but would leave the cursor
|
||
|
|
* on the colon command line. I believe that there are macros that
|
||
|
|
* depend on delete, at least, failing. For now, commands that use
|
||
|
|
* search as a motion component fail when the search returns to the
|
||
|
|
* original cursor position.
|
||
|
|
*/
|
||
|
|
if (vp->m_start.lno == vp->m_stop.lno &&
|
||
|
|
vp->m_start.cno == vp->m_stop.cno) {
|
||
|
|
msgq(sp, M_BERR, "190|Search wrapped to original position");
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* Searches become line mode operations if there was a delta specified
|
||
|
|
* to the search pattern.
|
||
|
|
*/
|
||
|
|
if (isdelta)
|
||
|
|
F_SET(vp, VM_LMODE);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the motion is in the reverse direction, switch the start and
|
||
|
|
* stop MARK's so that it's in a forward direction. (There's no
|
||
|
|
* reason for this other than to make the tests below easier. The
|
||
|
|
* code in vi.c:vi() would have done the switch.) Both forward
|
||
|
|
* and backward motions can happen for any kind of search command
|
||
|
|
* because of the wrapscan option.
|
||
|
|
*/
|
||
|
|
if (vp->m_start.lno > vp->m_stop.lno ||
|
||
|
|
vp->m_start.lno == vp->m_stop.lno &&
|
||
|
|
vp->m_start.cno > vp->m_stop.cno) {
|
||
|
|
m = vp->m_start;
|
||
|
|
vp->m_start = vp->m_stop;
|
||
|
|
vp->m_stop = m;
|
||
|
|
dir = BACKWARD;
|
||
|
|
} else
|
||
|
|
dir = FORWARD;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* BACKWARD:
|
||
|
|
* Delete and yank commands move to the end of the range.
|
||
|
|
* Ignore others.
|
||
|
|
*
|
||
|
|
* FORWARD:
|
||
|
|
* Delete and yank commands don't move. Ignore others.
|
||
|
|
*/
|
||
|
|
vp->m_final = vp->m_start;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* Delta'd searches don't correct based on column positions.
|
||
|
|
*/
|
||
|
|
if (isdelta)
|
||
|
|
return (0);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* Backward searches starting at column 0, and forward searches ending
|
||
|
|
* at column 0 are corrected to the last column of the previous line.
|
||
|
|
* Otherwise, adjust the starting/ending point to the character before
|
||
|
|
* the current one (this is safe because we know the search had to move
|
||
|
|
* to succeed).
|
||
|
|
*
|
||
|
|
* Searches become line mode operations if they start at the first
|
||
|
|
* nonblank and end at column 0 of another line.
|
||
|
|
*/
|
||
|
|
if (vp->m_start.lno < vp->m_stop.lno && vp->m_stop.cno == 0) {
|
||
|
|
if (db_get(sp, --vp->m_stop.lno, DBG_FATAL, NULL, &len))
|
||
|
|
return (1);
|
||
|
|
vp->m_stop.cno = len ? len - 1 : 0;
|
||
|
|
len = 0;
|
||
|
|
if (nonblank(sp, vp->m_start.lno, &len))
|
||
|
|
return (1);
|
||
|
|
if (vp->m_start.cno <= len)
|
||
|
|
F_SET(vp, VM_LMODE);
|
||
|
|
} else
|
||
|
|
--vp->m_stop.cno;
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|