228 lines
6.2 KiB
C
228 lines
6.2 KiB
C
/* $NetBSD: glbl.c,v 1.6 2005/06/26 19:10:49 christos Exp $ */
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/* glob.c: This file contains the global command routines for the ed line
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editor */
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/*-
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* Copyright (c) 1993 Andrew Moore, Talke Studio.
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char *rcsid = "@(#)glob.c,v 1.1 1994/02/01 00:34:40 alm Exp";
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#else
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__RCSID("$NetBSD: glbl.c,v 1.6 2005/06/26 19:10:49 christos Exp $");
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#endif
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#endif /* not lint */
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include "ed.h"
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/* build_active_list: add line matching a pattern to the global-active list */
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int
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build_active_list(int isgcmd)
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{
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pattern_t *pat;
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line_t *lp;
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long n;
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char *s;
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char delimiter;
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if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
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sprintf(errmsg, "invalid pattern delimiter");
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return ERR;
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} else if ((pat = get_compiled_pattern()) == NULL)
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return ERR;
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else if (*ibufp == delimiter)
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ibufp++;
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clear_active_list();
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lp = get_addressed_line_node(first_addr);
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for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
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if ((s = get_sbuf_line(lp)) == NULL)
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return ERR;
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if (isbinary)
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NUL_TO_NEWLINE(s, lp->len);
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if (!regexec(pat, s, 0, NULL, 0) == isgcmd &&
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set_active_node(lp) < 0)
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return ERR;
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}
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return 0;
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}
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/* exec_global: apply command list in the command buffer to the active
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lines in a range; return command status */
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long
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exec_global(int interact, int gflag)
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{
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static char *ocmd = NULL;
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static int ocmdsz = 0;
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line_t *lp = NULL;
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int status;
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int n;
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char *cmd = NULL;
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#ifdef BACKWARDS
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char cmdp[] = "p\n";
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if (!interact) {
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if (!strcmp(ibufp, "\n"))
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cmd = cmdp; /* null cmd-list == `p' */
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else if ((cmd = get_extended_line(&n, 0)) == NULL)
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return ERR;
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}
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#else
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if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
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return ERR;
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#endif
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clear_undo_stack();
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while ((lp = next_active_node()) != NULL) {
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if ((current_addr = get_line_node_addr(lp)) < 0)
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return ERR;
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if (interact) {
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/* print current_addr; get a command in global syntax */
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if (display_lines(current_addr, current_addr, gflag) < 0)
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return ERR;
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while ((n = get_tty_line()) > 0 &&
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ibuf[n - 1] != '\n')
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clearerr(stdin);
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if (n < 0)
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return ERR;
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else if (n == 0) {
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sprintf(errmsg, "unexpected end-of-file");
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return ERR;
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} else if (n == 1 && !strcmp(ibuf, "\n"))
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continue;
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else if (n == 2 && !strcmp(ibuf, "&\n")) {
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if (cmd == NULL) {
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sprintf(errmsg, "no previous command");
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return ERR;
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} else cmd = ocmd;
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} else if ((cmd = get_extended_line(&n, 0)) == NULL)
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return ERR;
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else {
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REALLOC(ocmd, ocmdsz, n + 1, ERR);
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memcpy(ocmd, cmd, n + 1);
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cmd = ocmd;
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}
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}
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ibufp = cmd;
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for (; *ibufp;)
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if ((status = extract_addr_range()) < 0 ||
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(status = exec_command()) < 0 ||
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(status > 0 && (status = display_lines(
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current_addr, current_addr, status))) < 0)
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return status;
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}
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return 0;
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}
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line_t **active_list; /* list of lines active in a global command */
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long active_last; /* index of last active line in active_list */
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long active_size; /* size of active_list */
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long active_ptr; /* active_list index (non-decreasing) */
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long active_ndx; /* active_list index (modulo active_last) */
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/* set_active_node: add a line node to the global-active list */
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int
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set_active_node(line_t *lp)
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{
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if (active_last + 1 > active_size) {
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int ti = active_size;
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line_t **ts;
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SPL1();
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#if defined(sun) || defined(NO_REALLOC_NULL)
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if (active_list != NULL) {
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#endif
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if ((ts = (line_t **) realloc(active_list,
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(ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
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fprintf(stderr, "%s\n", strerror(errno));
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sprintf(errmsg, "out of memory");
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SPL0();
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return ERR;
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}
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#if defined(sun) || defined(NO_REALLOC_NULL)
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} else {
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if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
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sizeof(line_t **))) == NULL) {
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fprintf(stderr, "%s\n", strerror(errno));
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sprintf(errmsg, "out of memory");
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SPL0();
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return ERR;
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}
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}
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#endif
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active_size = ti;
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active_list = ts;
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SPL0();
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}
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active_list[active_last++] = lp;
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return 0;
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}
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/* unset_active_nodes: remove a range of lines from the global-active list */
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void
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unset_active_nodes(line_t *np, line_t *mp)
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{
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line_t *lp;
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long i;
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for (lp = np; lp != mp; lp = lp->q_forw)
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for (i = 0; i < active_last; i++)
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if (active_list[active_ndx] == lp) {
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active_list[active_ndx] = NULL;
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active_ndx = INC_MOD(active_ndx, active_last - 1);
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break;
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} else active_ndx = INC_MOD(active_ndx, active_last - 1);
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}
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/* next_active_node: return the next global-active line node */
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line_t *
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next_active_node(void)
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{
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while (active_ptr < active_last && active_list[active_ptr] == NULL)
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active_ptr++;
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return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
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}
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/* clear_active_list: clear the global-active list */
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void
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clear_active_list(void)
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{
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SPL1();
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active_size = active_last = active_ptr = active_ndx = 0;
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free(active_list);
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active_list = NULL;
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SPL0();
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}
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