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/* glbl.c: This file contains the global command routines for the ed line
editor */
/* ed line editor.
Copyright (C) 1993, 1994 Andrew Moore, Talke Studio
All Rights Reserved
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef lint
static char *rcsid = "@(#)$Id: glbl.c,v 1.7 1994/11/13 04:25:44 alm Exp $";
#endif /* not lint */
#include "ed.h"
/* build_active_list: add line matching a pattern to the global-active list */
int
build_active_list (isgcmd)
int isgcmd;
{
pattern_t *pat;
line_t *lp;
long n;
char *s;
char delimiter;
if ((delimiter = *ibufp) == ' ' || delimiter == '\n')
{
sprintf (errmsg, "Invalid pattern delimiter");
return ERR;
}
else if ((pat = get_compiled_pattern ()) == NULL)
return ERR;
else if (*ibufp == delimiter)
ibufp++;
clear_active_list ();
lp = get_addressed_line_node (first_addr);
for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw)
{
if ((s = get_sbuf_line (lp)) == NULL)
return ERR;
if (isbinary)
NUL_TO_NEWLINE (s, lp->len);
if (!regexec (pat, s, 0, NULL, 0) == isgcmd &&
set_active_node (lp) < 0)
return ERR;
}
return 0;
}
/* exec_global: apply command list in the command buffer to the active
lines in a range; return command status */
long
exec_global (interact, gflag)
int interact;
int gflag;
{
static char *ocmd = NULL;
static int ocmdsz = 0;
line_t *lp = NULL;
int status;
int n;
char *cmd = NULL;
if (!interact)
if (traditional && !strcmp (ibufp, "\n"))
cmd = "p\n"; /* null cmd-list == `p' */
else if ((cmd = get_extended_line (&n, 0)) == NULL)
return ERR;
clear_undo_stack ();
while ((lp = next_active_node ()) != NULL)
{
if ((current_addr = get_line_node_addr (lp)) < 0)
return ERR;
if (interact)
{
/* print current_addr; get a command in global syntax */
if (display_lines (current_addr, current_addr, gflag) < 0)
return ERR;
while ((n = get_tty_line ()) > 0 &&
ibuf[n - 1] != '\n')
clearerr (stdin);
if (n < 0)
return ERR;
else if (n == 0)
{
sprintf (errmsg, "Unexpected end-of-file");
return ERR;
}
else if (n == 1 && !strcmp (ibuf, "\n"))
continue;
else if (n == 2 && !strcmp (ibuf, "&\n"))
{
if (cmd == NULL)
{
sprintf (errmsg, "No previous command");
return ERR;
}
else
cmd = ocmd;
}
else if ((cmd = get_extended_line (&n, 0)) == NULL)
return ERR;
else
{
REALLOC (ocmd, ocmdsz, n + 1, ERR);
memcpy (ocmd, cmd, n + 1);
cmd = ocmd;
}
}
ibufp = cmd;
for (; *ibufp;)
if ((status = extract_addr_range ()) < 0 ||
(status = exec_command ()) < 0 ||
(status > 0 && (status = display_lines (
current_addr, current_addr, status)) < 0))
return status;
}
return 0;
}
line_t **active_list; /* list of lines active in a global command */
long active_last; /* index of last active line in active_list */
long active_size; /* size of active_list */
long active_ptr; /* active_list index (non-decreasing) */
long active_ndx; /* active_list index (modulo active_last) */
/* set_active_node: add a line node to the global-active list */
int
set_active_node (lp)
line_t *lp;
{
if (active_last + 1 > active_size)
{
int ti = active_size;
line_t **ts;
SPL1 ();
if (active_list != NULL)
{
if ((ts = (line_t **) realloc (active_list,
(ti += MINBUFSZ) * sizeof (line_t **))) == NULL)
{
fprintf (stderr, "%s\n", strerror (errno));
sprintf (errmsg, "Out of memory");
SPL0 ();
return ERR;
}
}
else
{
if ((ts = (line_t **) malloc ((ti += MINBUFSZ) *
sizeof (line_t **))) == NULL)
{
fprintf (stderr, "%s\n", strerror (errno));
sprintf (errmsg, "Out of memory");
SPL0 ();
return ERR;
}
}
active_size = ti;
active_list = ts;
SPL0 ();
}
active_list[active_last++] = lp;
return 0;
}
/* unset_active_nodes: remove a range of lines from the global-active list */
void
unset_active_nodes (np, mp)
line_t *np, *mp;
{
line_t *lp;
long i;
for (lp = np; lp != mp; lp = lp->q_forw)
for (i = 0; i < active_last; i++)
if (active_list[active_ndx] == lp)
{
active_list[active_ndx] = NULL;
active_ndx = INC_MOD (active_ndx, active_last - 1);
break;
}
else
active_ndx = INC_MOD (active_ndx, active_last - 1);
}
/* next_active_node: return the next global-active line node */
line_t *
next_active_node ()
{
while (active_ptr < active_last && active_list[active_ptr] == NULL)
active_ptr++;
return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
}
/* clear_active_list: clear the global-active list */
void
clear_active_list ()
{
SPL1 ();
active_size = active_last = active_ptr = active_ndx = 0;
if (active_list != NULL)
free (active_list);
active_list = NULL;
SPL0 ();
}
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