276 lines
7.3 KiB
C
276 lines
7.3 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[] = "@(#)ex_append.c 10.27 (Berkeley) 4/27/96";
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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 <bitstring.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "../common/common.h"
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enum which {APPEND, CHANGE, INSERT};
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static int ex_aci __P((SCR *, EXCMD *, enum which));
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/*
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* ex_append -- :[line] a[ppend][!]
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* Append one or more lines of new text after the specified line,
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* or the current line if no address is specified.
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*
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* PUBLIC: int ex_append __P((SCR *, EXCMD *));
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*/
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int
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ex_append(sp, cmdp)
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SCR *sp;
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EXCMD *cmdp;
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{
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return (ex_aci(sp, cmdp, APPEND));
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}
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/*
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* ex_change -- :[line[,line]] c[hange][!] [count]
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* Change one or more lines to the input text.
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*
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* PUBLIC: int ex_change __P((SCR *, EXCMD *));
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*/
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int
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ex_change(sp, cmdp)
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SCR *sp;
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EXCMD *cmdp;
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{
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return (ex_aci(sp, cmdp, CHANGE));
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}
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/*
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* ex_insert -- :[line] i[nsert][!]
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* Insert one or more lines of new text before the specified line,
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* or the current line if no address is specified.
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*
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* PUBLIC: int ex_insert __P((SCR *, EXCMD *));
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*/
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int
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ex_insert(sp, cmdp)
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SCR *sp;
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EXCMD *cmdp;
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{
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return (ex_aci(sp, cmdp, INSERT));
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}
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/*
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* ex_aci --
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* Append, change, insert in ex.
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*/
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static int
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ex_aci(sp, cmdp, cmd)
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SCR *sp;
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EXCMD *cmdp;
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enum which cmd;
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{
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CHAR_T *p, *t;
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TEXT *tp;
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TEXTH tiq;
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recno_t cnt, lno;
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size_t len;
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u_int32_t flags;
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int need_newline;
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NEEDFILE(sp, cmdp);
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/*
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* If doing a change, replace lines for as long as possible. Then,
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* append more lines or delete remaining lines. Changes to an empty
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* file are appends, inserts are the same as appends to the previous
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* line.
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*
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* !!!
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* Set the address to which we'll append. We set sp->lno to this
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* address as well so that autoindent works correctly when get text
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* from the user.
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*/
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lno = cmdp->addr1.lno;
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sp->lno = lno;
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if ((cmd == CHANGE || cmd == INSERT) && lno != 0)
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--lno;
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/*
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* !!!
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* If the file isn't empty, cut changes into the unnamed buffer.
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*/
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if (cmd == CHANGE && cmdp->addr1.lno != 0 &&
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(cut(sp, NULL, &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE) ||
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delete(sp, &cmdp->addr1, &cmdp->addr2, 1)))
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return (1);
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/*
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* !!!
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* Anything that was left after the command separator becomes part
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* of the inserted text. Apparently, it was common usage to enter:
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*
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* :g/pattern/append|stuff1
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*
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* and append the line of text "stuff1" to the lines containing the
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* pattern. It was also historically legal to enter:
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*
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* :append|stuff1
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* stuff2
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* .
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*
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* and the text on the ex command line would be appended as well as
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* the text inserted after it. There was an historic bug however,
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* that the user had to enter *two* terminating lines (the '.' lines)
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* to terminate text input mode, in this case. This whole thing
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* could be taken too far, however. Entering:
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*
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* :append|stuff1\
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* stuff2
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* stuff3
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* .
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*
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* i.e. mixing and matching the forms confused the historic vi, and,
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* not only did it take two terminating lines to terminate text input
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* mode, but the trailing backslashes were retained on the input. We
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* match historic practice except that we discard the backslashes.
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*
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* Input lines specified on the ex command line lines are separated by
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* <newline>s. If there is a trailing delimiter an empty line was
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* inserted. There may also be a leading delimiter, which is ignored
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* unless it's also a trailing delimiter. It is possible to encounter
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* a termination line, i.e. a single '.', in a global command, but not
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* necessary if the text insert command was the last of the global
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* commands.
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*/
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if (cmdp->save_cmdlen != 0) {
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for (p = cmdp->save_cmd,
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len = cmdp->save_cmdlen; len > 0; p = t) {
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for (t = p; len > 0 && t[0] != '\n'; ++t, --len);
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if (t != p || len == 0) {
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if (F_ISSET(sp, SC_EX_GLOBAL) &&
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t - p == 1 && p[0] == '.') {
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++t;
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if (len > 0)
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--len;
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break;
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}
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if (db_append(sp, 1, lno++, p, t - p))
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return (1);
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}
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if (len != 0) {
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++t;
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if (--len == 0 &&
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db_append(sp, 1, lno++, "", 0))
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return (1);
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}
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}
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/*
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* If there's any remaining text, we're in a global, and
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* there's more command to parse.
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*
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* !!!
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* We depend on the fact that non-global commands will eat the
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* rest of the command line as text input, and before getting
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* any text input from the user. Otherwise, we'd have to save
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* off the command text before or during the call to the text
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* input function below.
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*/
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if (len != 0)
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cmdp->save_cmd = t;
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cmdp->save_cmdlen = len;
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}
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if (F_ISSET(sp, SC_EX_GLOBAL)) {
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if ((sp->lno = lno) == 0 && db_exist(sp, 1))
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sp->lno = 1;
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return (0);
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}
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/*
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* If not in a global command, read from the terminal.
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*
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* If this code is called by vi, we want to reset the terminal and use
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* ex's line get routine. It actually works fine if we use vi's get
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* routine, but it doesn't look as nice. Maybe if we had a separate
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* window or something, but getting a line at a time looks awkward.
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* However, depending on the screen that we're using, that may not
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* be possible.
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*/
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if (F_ISSET(sp, SC_VI)) {
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if (sp->gp->scr_screen(sp, SC_EX)) {
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ex_emsg(sp, cmdp->cmd->name, EXM_NOCANON);
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return (1);
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}
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/* If we're still in the vi screen, move out explicitly. */
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need_newline = !F_ISSET(sp, SC_SCR_EXWROTE);
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F_SET(sp, SC_SCR_EX | SC_SCR_EXWROTE);
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if (need_newline)
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(void)ex_puts(sp, "\n");
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/*
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* !!!
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* Users of historical versions of vi sometimes get confused
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* when they enter append mode, and can't seem to get out of
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* it. Give them an informational message.
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*/
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(void)ex_puts(sp,
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msg_cat(sp, "273|Entering ex input mode.", NULL));
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(void)ex_puts(sp, "\n");
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(void)ex_fflush(sp);
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}
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/*
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* Set input flags; the ! flag turns off autoindent for append,
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* change and insert.
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*/
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LF_INIT(TXT_DOTTERM | TXT_NUMBER);
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if (!FL_ISSET(cmdp->iflags, E_C_FORCE) && O_ISSET(sp, O_AUTOINDENT))
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LF_SET(TXT_AUTOINDENT);
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if (O_ISSET(sp, O_BEAUTIFY))
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LF_SET(TXT_BEAUTIFY);
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/*
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* This code can't use the common screen TEXTH structure (sp->tiq),
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* as it may already be in use, e.g. ":append|s/abc/ABC/" would fail
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* as we are only halfway through the text when the append code fires.
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* Use a local structure instead. (The ex code would have to use a
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* local structure except that we're guaranteed to finish remaining
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* characters in the common TEXTH structure when they were inserted
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* into the file, above.)
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*/
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memset(&tiq, 0, sizeof(TEXTH));
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CIRCLEQ_INIT(&tiq);
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if (ex_txt(sp, &tiq, 0, flags))
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return (1);
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for (cnt = 0, tp = tiq.cqh_first;
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tp != (TEXT *)&tiq; ++cnt, tp = tp->q.cqe_next)
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if (db_append(sp, 1, lno++, tp->lb, tp->len))
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return (1);
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/*
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* Set sp->lno to the final line number value (correcting for a
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* possible 0 value) as that's historically correct for the final
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* line value, whether or not the user entered any text.
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*/
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if ((sp->lno = lno) == 0 && db_exist(sp, 1))
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sp->lno = 1;
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return (0);
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}
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