405 lines
10 KiB
C
405 lines
10 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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/* from: static char sccsid[] = "@(#)ex_global.c 8.29 (Berkeley) 1/9/94"; */
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static char *rcsid = "$Id: ex_global.c,v 1.2 1994/01/24 06:40:19 cgd Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "vi.h"
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#include "excmd.h"
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#include "interrupt.h"
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enum which {GLOBAL, VGLOBAL};
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static int global __P((SCR *, EXF *, EXCMDARG *, enum which));
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static void global_intr __P((int));
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/*
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* ex_global -- [line [,line]] g[lobal][!] /pattern/ [commands]
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* Exec on lines matching a pattern.
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*/
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int
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ex_global(sp, ep, cmdp)
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SCR *sp;
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EXF *ep;
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EXCMDARG *cmdp;
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{
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return (global(sp, ep,
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cmdp, F_ISSET(cmdp, E_FORCE) ? VGLOBAL : GLOBAL));
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}
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/*
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* ex_vglobal -- [line [,line]] v[global] /pattern/ [commands]
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* Exec on lines not matching a pattern.
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*/
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int
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ex_vglobal(sp, ep, cmdp)
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SCR *sp;
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EXF *ep;
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EXCMDARG *cmdp;
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{
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return (global(sp, ep, cmdp, VGLOBAL));
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}
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static int
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global(sp, ep, cmdp, cmd)
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SCR *sp;
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EXF *ep;
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EXCMDARG *cmdp;
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enum which cmd;
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{
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DECLARE_INTERRUPTS;
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RANGE *rp;
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EX_PRIVATE *exp;
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recno_t elno, lno;
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regmatch_t match[1];
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regex_t *re, lre;
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size_t clen, len;
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int delim, eval, reflags, replaced, rval;
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char *cb, *ptrn, *p, *t;
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/*
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* Skip leading white space. Historic vi allowed any non-
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* alphanumeric to serve as the global command delimiter.
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*/
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for (p = cmdp->argv[0]->bp; isblank(*p); ++p);
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if (*p == '\0' || isalnum(*p)) {
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msgq(sp, M_ERR, "Usage: %s.", cmdp->cmd->usage);
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return (1);
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}
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delim = *p++;
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/*
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* Get the pattern string, toss escaped characters.
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*
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* QUOTING NOTE:
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* Only toss an escaped character if it escapes a delimiter.
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*/
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for (ptrn = t = p;;) {
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if (p[0] == '\0' || p[0] == delim) {
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if (p[0] == delim)
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++p;
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/*
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* !!!
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* Nul terminate the pattern string -- it's passed
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* to regcomp which doesn't understand anything else.
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*/
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*t = '\0';
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break;
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}
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if (p[0] == '\\' && p[1] == delim)
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++p;
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*t++ = *p++;
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}
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/* If the pattern string is empty, use the last one. */
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if (*ptrn == '\0') {
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if (!F_ISSET(sp, S_SRE_SET)) {
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msgq(sp, M_ERR, "No previous regular expression.");
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return (1);
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}
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re = &sp->sre;
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} else {
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/* Set RE flags. */
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reflags = 0;
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if (O_ISSET(sp, O_EXTENDED))
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reflags |= REG_EXTENDED;
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if (O_ISSET(sp, O_IGNORECASE))
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reflags |= REG_ICASE;
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/* Convert vi-style RE's to POSIX 1003.2 RE's. */
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if (re_conv(sp, &ptrn, &replaced))
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return (1);
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/* Compile the RE. */
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re = &lre;
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eval = regcomp(re, ptrn, reflags);
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/* Free up any allocated memory. */
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if (replaced)
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free(ptrn);
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if (eval) {
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re_error(sp, eval, re);
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return (1);
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}
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/*
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* Set saved RE. Historic practice is that
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* globals set direction as well as the RE.
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*/
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sp->sre = lre;
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sp->searchdir = FORWARD;
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F_SET(sp, S_SRE_SET);
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}
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/* Get a copy of the command string. */
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if ((clen = strlen(p)) == 0) {
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msgq(sp, M_ERR, "No command string specified.");
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return (1);
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}
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MALLOC_RET(sp, cb, char *, clen);
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memmove(cb, p, clen);
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/*
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* The global commands sets the substitute RE as well as
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* the everything-else RE.
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*/
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sp->subre = sp->sre;
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F_SET(sp, S_SUBRE_SET);
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/* Set the global flag, and set up interrupts. */
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F_SET(sp, S_GLOBAL);
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SET_UP_INTERRUPTS(global_intr);
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/*
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* For each line... The semantics of global matching are that we first
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* have to decide which lines are going to get passed to the command,
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* and then pass them to the command, ignoring other changes. There's
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* really no way to do this in a single pass, since arbitrary line
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* creation, deletion and movement can be done in the ex command. For
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* example, a good vi clone test is ":g/X/mo.-3", or "g/X/.,.+1d".
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* What we do is create linked list of lines that are tracked through
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* each ex command. There's a callback routine which the DB interface
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* routines call when a line is created or deleted. This doesn't help
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* the layering much.
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*/
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exp = EXP(sp);
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for (rval = 0, lno = cmdp->addr1.lno,
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elno = cmdp->addr2.lno; lno <= elno; ++lno) {
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/* Someone's unhappy, time to stop. */
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if (F_ISSET(sp, S_INTERRUPTED))
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goto interrupted;
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/* Get the line and search for a match. */
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if ((t = file_gline(sp, ep, lno, &len)) == NULL) {
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GETLINE_ERR(sp, lno);
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goto err;
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}
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match[0].rm_so = 0;
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match[0].rm_eo = len;
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switch(eval = regexec(re, t, 1, match, REG_STARTEND)) {
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case 0:
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if (cmd == VGLOBAL)
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continue;
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break;
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case REG_NOMATCH:
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if (cmd == GLOBAL)
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continue;
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break;
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default:
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re_error(sp, eval, re);
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goto err;
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}
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/* If follows the last entry, extend the last entry's range. */
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if ((rp = exp->rangeq.cqh_last) != (void *)&exp->rangeq &&
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rp->stop == lno - 1) {
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++rp->stop;
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continue;
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}
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/* Allocate a new range, and append it to the list. */
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CALLOC(sp, rp, RANGE *, 1, sizeof(RANGE));
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if (rp == NULL)
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goto err;
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rp->start = rp->stop = lno;
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CIRCLEQ_INSERT_TAIL(&exp->rangeq, rp, q);
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}
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exp = EXP(sp);
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exp->range_lno = OOBLNO;
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for (;;) {
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/*
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* Start at the beginning of the range each time, it may have
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* been changed (or exhausted) if lines were inserted/deleted.
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*/
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if ((rp = exp->rangeq.cqh_first) == (void *)&exp->rangeq)
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break;
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if (rp->start > rp->stop) {
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CIRCLEQ_REMOVE(&exp->rangeq, exp->rangeq.cqh_first, q);
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free(rp);
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continue;
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}
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/*
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* Execute the command, setting the cursor to the line so that
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* relative addressing works. This means that the cursor moves
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* to the last line sent to the command, by default, even if
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* the command fails.
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*/
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exp->range_lno = sp->lno = rp->start++;
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if (ex_cmd(sp, ep, cb, clen))
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goto err;
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/* Someone's unhappy, time to stop. */
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if (F_ISSET(sp, S_INTERRUPTED)) {
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interrupted: msgq(sp, M_INFO, "Interrupted.");
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break;
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}
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}
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/* Set the cursor to the new value, making sure it exists. */
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if (exp->range_lno != OOBLNO) {
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if (file_lline(sp, ep, &lno))
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return (1);
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sp->lno =
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lno < exp->range_lno ? (lno ? lno : 1) : exp->range_lno;
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}
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if (0) {
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err: rval = 1;
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}
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interrupt_err:
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F_CLR(sp, S_GLOBAL);
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TEAR_DOWN_INTERRUPTS;
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/* Free any remaining ranges and the command buffer. */
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while ((rp = exp->rangeq.cqh_first) != (void *)&exp->rangeq) {
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CIRCLEQ_REMOVE(&exp->rangeq, exp->rangeq.cqh_first, q);
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free(rp);
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}
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free(cb);
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return (rval);
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}
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/*
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* global_insdel --
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* Update the ranges based on an insertion or deletion.
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*/
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void
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global_insdel(sp, ep, op, lno)
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SCR *sp;
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EXF *ep;
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enum operation op;
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recno_t lno;
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{
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EX_PRIVATE *exp;
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RANGE *nrp, *rp;
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exp = EXP(sp);
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switch (op) {
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case LINE_APPEND:
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return;
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case LINE_DELETE:
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for (rp = exp->rangeq.cqh_first;
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rp != (void *)&exp->rangeq; rp = nrp) {
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nrp = rp->q.cqe_next;
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/* If range less than the line, ignore it. */
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if (rp->stop < lno)
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continue;
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/* If range greater than the line, decrement range. */
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if (rp->start > lno) {
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--rp->start;
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--rp->stop;
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continue;
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}
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/* Lno is inside the range, decrement the end point. */
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if (rp->start > --rp->stop) {
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CIRCLEQ_REMOVE(&exp->rangeq, rp, q);
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free(rp);
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}
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}
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break;
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case LINE_INSERT:
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for (rp = exp->rangeq.cqh_first;
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rp != (void *)&exp->rangeq; rp = rp->q.cqe_next) {
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/* If range less than the line, ignore it. */
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if (rp->stop < lno)
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continue;
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/* If range greater than the line, increment range. */
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if (rp->start >= lno) {
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++rp->start;
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++rp->stop;
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continue;
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}
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/*
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* Lno is inside the range, so the range must be split.
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* Since we're inserting a new element, neither range
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* can be exhausted.
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*/
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CALLOC(sp, nrp, RANGE *, 1, sizeof(RANGE));
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if (nrp == NULL) {
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F_SET(sp, S_INTERRUPTED);
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return;
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}
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nrp->start = lno + 1;
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nrp->stop = rp->stop + 1;
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rp->stop = lno - 1;
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CIRCLEQ_INSERT_AFTER(&exp->rangeq, rp, nrp, q);
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rp = nrp;
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}
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break;
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case LINE_RESET:
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return;
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}
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/*
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* If the command deleted/inserted lines, the cursor moves to
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* the line after the deleted/inserted line.
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*/
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exp->range_lno = lno;
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}
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/*
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* global_intr --
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* Set the interrupt bit in any screen that is running an interruptible
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* global.
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*
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* XXX
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* In the future this may be a problem. The user should be able to move to
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* another screen and keep typing while this runs. If so, and the user has
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* more than one global running, it will be hard to decide which one to
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* stop.
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*/
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static void
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global_intr(signo)
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int signo;
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{
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SCR *sp;
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for (sp = __global_list->dq.cqh_first;
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sp != (void *)&__global_list->dq; sp = sp->q.cqe_next)
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if (F_ISSET(sp, S_GLOBAL) && F_ISSET(sp, S_INTERRUPTIBLE))
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F_SET(sp, S_INTERRUPTED);
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}
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