#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 "readline.h"
#include "history.h"
#include "rlprivate.h"
#include "xmalloc.h"
unsigned char *_rl_isearch_terminators = (unsigned char *)NULL;
extern HIST_ENTRY *saved_line_for_history;
static int rl_search_history __P((int, int));
static char *prev_line_found;
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 = 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, 0);
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_line, last_found_line;
int c, found, failed, sline_len;
char *sline;
int line_index;
int reverse;
unsigned char *isearch_terminators;
orig_point = rl_point;
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
: (unsigned char *)"\033\012";
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 (saved_line_for_history)
lines[i] = saved_line_for_history->line;
else
{
allocated_line = 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 = 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 (;;)
{
Function *f = (Function *)NULL;
c = rl_read_key ();
if (_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;
}
#if 0
if (c == ESC || c == NEWLINE)
#else
if (strchr (isearch_terminators, c))
#endif
{
if (c == ESC && _rl_input_available ())
rl_execute_next (ESC);
break;
}
if (c >= 0 && (CTRL_CHAR (c) || META_CHAR (c) || c == RUBOUT) && c != CTRL ('G'))
{
rl_execute_next (c);
break;
}
switch (c)
{
case -1:
if (search_string_index == 0)
continue;
else if (reverse)
--line_index;
else if (line_index != sline_len)
++line_index;
else
ding ();
break;
case -2:
direction = -direction;
reverse = direction < 0;
break;
case CTRL ('G'):
strcpy (rl_line_buffer, lines[orig_line]);
rl_point = orig_point;
rl_end = strlen (rl_line_buffer);
rl_restore_prompt();
rl_clear_message ();
if (allocated_line)
free (allocated_line);
free (lines);
return 0;
#if 0
case -3:
if (search_string_index == 0)
ding ();
else
{
search_string[--search_string_index] = '\0';
}
break;
#endif
default:
if (search_string_index + 2 >= search_string_size)
{
search_string_size += 128;
search_string = xrealloc (search_string, search_string_size);
}
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)
{
ding ();
i = last_found_line;
continue;
}
if (found)
{
int line_len;
prev_line_found = lines[i];
line_len = strlen (lines[i]);
if (line_len >= rl_line_buffer_len)
rl_extend_line_buffer (line_len);
strcpy (rl_line_buffer, lines[i]);
rl_point = line_index;
rl_end = line_len;
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 (search_string);
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)
line_index = strlen (rl_line_buffer);
rl_point = line_index;
rl_clear_message ();
if (allocated_line)
free (allocated_line);
free (lines);
return 0;
}