#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
# include <config.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif
#include "rldefs.h"
#include "rlmbutil.h"
#include "readline.h"
#include "history.h"
#include "rlprivate.h"
#include "xmalloc.h"
char *_rl_isearch_terminators = (char *)NULL;
extern HIST_ENTRY *_rl_saved_line_for_history;
static int rl_search_history PARAMS((int, int));
static char *prev_line_found;
static char *last_isearch_string;
static int last_isearch_string_len;
static char *default_isearch_terminators = "\033\012";
int
rl_reverse_search_history (sign, key)
int sign, key;
{
return (rl_search_history (-sign, key));
}
int
rl_forward_search_history (sign, key)
int sign, key;
{
return (rl_search_history (sign, key));
}
static void
rl_display_search (search_string, reverse_p, where)
char *search_string;
int reverse_p, where;
{
char *message;
int msglen, searchlen;
searchlen = (search_string && *search_string) ? strlen (search_string) : 0;
message = (char *)xmalloc (searchlen + 33);
msglen = 0;
#if defined (NOTDEF)
if (where != -1)
{
sprintf (message, "[%d]", where + history_base);
msglen = strlen (message);
}
#endif
message[msglen++] = '(';
if (reverse_p)
{
strcpy (message + msglen, "reverse-");
msglen += 8;
}
strcpy (message + msglen, "i-search)`");
msglen += 10;
if (search_string)
{
strcpy (message + msglen, search_string);
msglen += searchlen;
}
strcpy (message + msglen, "': ");
rl_message ("%s", message);
free (message);
(*rl_redisplay_function) ();
}
static int
rl_search_history (direction, invoking_key)
int direction, invoking_key;
{
char *search_string;
int search_string_index;
int search_string_size;
char **lines, *allocated_line;
int hlen;
HIST_ENTRY **hlist;
register int i;
int orig_point, orig_mark, orig_line, last_found_line;
int c, found, failed, sline_len;
int n, wstart, wlen;
#if defined (HANDLE_MULTIBYTE)
char mb[MB_LEN_MAX];
#endif
char *sline;
int line_index;
int reverse;
char *isearch_terminators;
RL_SETSTATE(RL_STATE_ISEARCH);
orig_point = rl_point;
orig_mark = rl_mark;
last_found_line = orig_line = where_history ();
reverse = direction < 0;
hlist = history_list ();
allocated_line = (char *)NULL;
isearch_terminators = _rl_isearch_terminators ? _rl_isearch_terminators
: default_isearch_terminators;
rl_maybe_replace_line ();
i = 0;
if (hlist)
for (i = 0; hlist[i]; i++);
lines = (char **)xmalloc ((1 + (hlen = i)) * sizeof (char *));
for (i = 0; i < hlen; i++)
lines[i] = hlist[i]->line;
if (_rl_saved_line_for_history)
lines[i] = _rl_saved_line_for_history->line;
else
{
allocated_line = (char *)xmalloc (1 + strlen (rl_line_buffer));
strcpy (allocated_line, &rl_line_buffer[0]);
lines[i] = allocated_line;
}
hlen++;
i = orig_line;
rl_save_prompt ();
search_string = (char *)xmalloc (search_string_size = 128);
*search_string = '\0';
search_string_index = 0;
prev_line_found = (char *)0;
direction = (direction >= 0) ? 1 : -1;
rl_display_search (search_string, reverse, -1);
sline = rl_line_buffer;
sline_len = strlen (sline);
line_index = rl_point;
found = failed = 0;
for (;;)
{
rl_command_func_t *f = (rl_command_func_t *)NULL;
RL_SETSTATE(RL_STATE_MOREINPUT);
c = rl_read_key ();
RL_UNSETSTATE(RL_STATE_MOREINPUT);
#if defined (HANDLE_MULTIBYTE)
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
c = _rl_read_mbstring (c, mb, MB_LEN_MAX);
#endif
if (c >= 0 && _rl_keymap[c].type == ISFUNC)
{
f = _rl_keymap[c].function;
if (f == rl_reverse_search_history)
c = reverse ? -1 : -2;
else if (f == rl_forward_search_history)
c = !reverse ? -1 : -2;
else if (f == rl_rubout)
c = -3;
else if (c == CTRL ('G'))
c = -4;
else if (c == CTRL ('W'))
c = -5;
else if (c == CTRL ('Y'))
c = -6;
}
if (strchr (isearch_terminators, c))
{
if (c == ESC && _rl_input_available ())
rl_execute_next (ESC);
break;
}
#define ENDSRCH_CHAR(c) \
((CTRL_CHAR (c) || META_CHAR (c) || (c) == RUBOUT) && ((c) != CTRL ('G')))
#if defined (HANDLE_MULTIBYTE)
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
{
if (c >= 0 && strlen (mb) == 1 && ENDSRCH_CHAR (c))
{
rl_execute_next (c);
break;
}
}
else
#endif
if (c >= 0 && ENDSRCH_CHAR (c))
{
rl_execute_next (c);
break;
}
switch (c)
{
case -1:
if (search_string_index == 0)
{
if (last_isearch_string)
{
search_string_size = 64 + last_isearch_string_len;
search_string = (char *)xrealloc (search_string, search_string_size);
strcpy (search_string, last_isearch_string);
search_string_index = last_isearch_string_len;
rl_display_search (search_string, reverse, -1);
break;
}
continue;
}
else if (reverse)
--line_index;
else if (line_index != sline_len)
++line_index;
else
rl_ding ();
break;
case -2:
direction = -direction;
reverse = direction < 0;
break;
case -3:
if (search_string_index == 0)
rl_ding ();
else
search_string[--search_string_index] = '\0';
break;
case -4:
rl_replace_line (lines[orig_line], 0);
rl_point = orig_point;
rl_mark = orig_mark;
rl_restore_prompt();
rl_clear_message ();
if (allocated_line)
free (allocated_line);
free (lines);
RL_UNSETSTATE(RL_STATE_ISEARCH);
return 0;
case -5:
wstart = rl_point + search_string_index;
if (wstart >= rl_end)
{
rl_ding ();
break;
}
if (rl_alphabetic(rl_line_buffer[wstart]) == 0)
{
rl_ding ();
break;
}
n = wstart;
while (n < rl_end && rl_alphabetic(rl_line_buffer[n]))
n++;
wlen = n - wstart + 1;
if (search_string_index + wlen + 1 >= search_string_size)
{
search_string_size += wlen + 1;
search_string = (char *)xrealloc (search_string, search_string_size);
}
for (; wstart < n; wstart++)
search_string[search_string_index++] = rl_line_buffer[wstart];
search_string[search_string_index] = '\0';
break;
case -6:
wstart = rl_point + search_string_index;
if (wstart >= rl_end)
{
rl_ding ();
break;
}
n = rl_end - wstart + 1;
if (search_string_index + n + 1 >= search_string_size)
{
search_string_size += n + 1;
search_string = (char *)xrealloc (search_string, search_string_size);
}
for (n = wstart; n < rl_end; n++)
search_string[search_string_index++] = rl_line_buffer[n];
search_string[search_string_index] = '\0';
break;
default:
if (search_string_index + 2 >= search_string_size)
{
search_string_size += 128;
search_string = (char *)xrealloc (search_string, search_string_size);
}
#if defined (HANDLE_MULTIBYTE)
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
{
int j, l;
for (j = 0, l = strlen (mb); j < l; )
search_string[search_string_index++] = mb[j++];
}
else
#endif
search_string[search_string_index++] = c;
search_string[search_string_index] = '\0';
break;
}
for (found = failed = 0;;)
{
int limit = sline_len - search_string_index + 1;
while (reverse ? (line_index >= 0) : (line_index < limit))
{
if (STREQN (search_string, sline + line_index, search_string_index))
{
found++;
break;
}
else
line_index += direction;
}
if (found)
break;
do
{
i += direction;
if (reverse ? (i < 0) : (i == hlen))
{
failed++;
break;
}
sline = lines[i];
sline_len = strlen (sline);
}
while ((prev_line_found && STREQ (prev_line_found, lines[i])) ||
(search_string_index > sline_len));
if (failed)
break;
line_index = reverse ? sline_len - search_string_index : 0;
}
if (failed)
{
rl_ding ();
i = last_found_line;
continue;
}
if (found)
{
prev_line_found = lines[i];
rl_replace_line (lines[i], 0);
rl_point = line_index;
last_found_line = i;
rl_display_search (search_string, reverse, (i == orig_line) ? -1 : i);
}
}
strcpy (rl_line_buffer, lines[orig_line]);
rl_restore_prompt ();
FREE (last_isearch_string);
last_isearch_string = search_string;
last_isearch_string_len = search_string_index;
if (last_found_line < orig_line)
rl_get_previous_history (orig_line - last_found_line, 0);
else
rl_get_next_history (last_found_line - orig_line, 0);
if (line_index < 0)
{
if (last_found_line == orig_line)
line_index = orig_point;
else
line_index = strlen (rl_line_buffer);
rl_mark = orig_mark;
}
rl_point = line_index;
rl_clear_message ();
FREE (allocated_line);
free (lines);
RL_UNSETSTATE(RL_STATE_ISEARCH);
return 0;
}