160 lines
3.6 KiB
C
160 lines
3.6 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_edit.c,v 10.15 2011/12/22 23:26:50 zy 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 <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/vi.h"
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static int ex_N_edit(SCR *, EXCMD *, FREF *, int);
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/*
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* ex_edit -- :e[dit][!] [+cmd] [file]
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* :ex[!] [+cmd] [file]
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* :vi[sual][!] [+cmd] [file]
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*
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* Edit a file; if none specified, re-edit the current file. The third
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* form of the command can only be executed while in vi mode. See the
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* hack in ex.c:ex_cmd().
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*
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* !!!
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* Historic vi didn't permit the '+' command form without specifying
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* a file name as well. This seems unreasonable, so we support it
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* regardless.
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*
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* PUBLIC: int ex_edit(SCR *, EXCMD *);
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*/
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int
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ex_edit(SCR *sp, EXCMD *cmdp)
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{
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FREF *frp;
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int attach, setalt;
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char *np;
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size_t nlen;
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switch (cmdp->argc) {
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case 0:
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/*
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* If the name has been changed, we edit that file, not the
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* original name. If the user was editing a temporary file
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* (or wasn't editing any file), create another one. The
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* reason for not reusing temporary files is that there is
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* special exit processing of them, and reuse is tricky.
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*/
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frp = sp->frp;
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if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) {
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if ((frp = file_add(sp, NULL)) == NULL)
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return (1);
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attach = 0;
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} else
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attach = 1;
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setalt = 0;
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break;
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case 1:
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INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
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np, nlen);
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if ((frp = file_add(sp, np)) == NULL)
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return (1);
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attach = 0;
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setalt = 1;
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set_alt_name(sp, np);
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break;
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default:
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abort();
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}
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if (F_ISSET(cmdp, E_NEWSCREEN) || cmdp->cmd == &cmds[C_VSPLIT])
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return (ex_N_edit(sp, cmdp, frp, attach));
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/*
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* Check for modifications.
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*
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* !!!
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* Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
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*/
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if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
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return (1);
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/* Switch files. */
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if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) |
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(FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
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return (1);
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F_SET(sp, SC_FSWITCH);
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return (0);
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}
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/*
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* ex_N_edit --
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* New screen version of ex_edit.
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*/
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static int
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ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach)
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{
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SCR *new;
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/* Get a new screen. */
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if (screen_init(sp->gp, sp, &new))
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return (1);
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if ((cmdp->cmd == &cmds[C_VSPLIT] && vs_vsplit(sp, new)) ||
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(cmdp->cmd != &cmds[C_VSPLIT] && vs_split(sp, new, 0))) {
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(void)screen_end(new);
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return (1);
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}
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/* Get a backing file. */
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if (attach) {
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/* Copy file state, keep the screen and cursor the same. */
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new->ep = sp->ep;
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++new->ep->refcnt;
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new->frp = frp;
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new->frp->flags = sp->frp->flags;
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new->lno = sp->lno;
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new->cno = sp->cno;
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#if defined(USE_WIDECHAR) && defined(USE_ICONV)
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/* Synchronize the iconv environments. */
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o_set(new, O_FILEENCODING, OS_STRDUP,
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O_STR(sp, O_FILEENCODING), 0);
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conv_enc(new, O_FILEENCODING, 0);
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#endif
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} else if (file_init(new, frp, NULL,
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(FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
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(void)vs_discard(new, NULL);
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(void)screen_end(new);
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return (1);
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}
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/* Create the argument list. */
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new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name);
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/* Set up the switch. */
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sp->nextdisp = new;
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F_SET(sp, SC_SSWITCH);
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return (0);
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}
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