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authorElena Zannoni <ezannoni@kwikemart.cygnus.com>2000-07-09 17:20:00 +0000
committerElena Zannoni <ezannoni@kwikemart.cygnus.com>2000-07-09 17:20:00 +0000
commit1b17e766659d93d1e7bd6633bf78132e1abb3568 (patch)
tree6fa61b8b0140bca0772cdf39390405ca20fec949 /readline/search.c
parentd0352a18a504a4e7b761f6b3264cf11347d8d056 (diff)
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readline:
2000-07-09 Elena Zannoni <ezannoni@kwikemart.cygnus.com> * Import of readline 4.1. Locally modified files: Makefile.in, configure.in, configure (regenerated), config.h.in (regenerated), readline.h, rltty.c, shell.c signals.c. Locally added files: acconfig.h, config/*, config.h.bot, cross-build/*, doc/inc-hit.texinfo. New files: USAGE, rlprivate.h, rlshell.h, xmalloc.h. examples: 2000-07-09 Elena Zannoni <ezannoni@kwikemart.cygnus.com> * Import of readline 4.1. New files: excallback.c, rlfe.c. doc: 2000-07-09 Elena Zannoni <ezannoni@kwikemart.cygnus.com> * Import of readline 4.1. Regenerated inc-hist.texinfo as copy of hsuser.texinfo, for inclusion in the gdb manual. New file: rluserman.texinfo
Diffstat (limited to 'readline/search.c')
-rw-r--r--readline/search.c182
1 files changed, 114 insertions, 68 deletions
diff --git a/readline/search.c b/readline/search.c
index 6c76e1a..112f807 100644
--- a/readline/search.c
+++ b/readline/search.c
@@ -8,7 +8,7 @@
The Library 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 1, or (at your option)
+ the Free Software Foundation; either version 2, or (at your option)
any later version.
The Library is distributed in the hope that it will be useful, but
@@ -19,7 +19,7 @@
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
- 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
@@ -43,30 +43,51 @@
#include "readline.h"
#include "history.h"
+#include "rlprivate.h"
+#include "xmalloc.h"
+
#ifdef abs
# undef abs
#endif
#define abs(x) (((x) >= 0) ? (x) : -(x))
-extern char *xmalloc (), *xrealloc ();
-
-/* Variables imported from readline.c */
-extern int rl_point, rl_end, rl_line_buffer_len;
-extern int rl_editing_mode;
-extern char *rl_prompt;
-extern char *rl_line_buffer;
extern HIST_ENTRY *saved_line_for_history;
-extern Function *rl_last_func;
/* Functions imported from the rest of the library. */
-extern int _rl_free_history_entry ();
-extern char *_rl_make_prompt_for_search ();
-extern void rl_extend_line_buffer ();
+extern int _rl_free_history_entry __P((HIST_ENTRY *));
static char *noninc_search_string = (char *) NULL;
static int noninc_history_pos;
+
static char *prev_line_found = (char *) NULL;
+static int rl_history_search_len;
+static int rl_history_search_pos;
+static char *history_search_string;
+static int history_string_size;
+
+/* Make the data from the history entry ENTRY be the contents of the
+ current line. This doesn't do anything with rl_point; the caller
+ must set it. */
+static void
+make_history_line_current (entry)
+ HIST_ENTRY *entry;
+{
+ int line_len;
+
+ line_len = strlen (entry->line);
+ if (line_len >= rl_line_buffer_len)
+ rl_extend_line_buffer (line_len);
+ strcpy (rl_line_buffer, entry->line);
+
+ rl_undo_list = (UNDO_LIST *)entry->data;
+ rl_end = line_len;
+
+ if (saved_line_for_history)
+ _rl_free_history_entry (saved_line_for_history);
+ saved_line_for_history = (HIST_ENTRY *)NULL;
+}
+
/* Search the history list for STRING starting at absolute history position
POS. If STRING begins with `^', the search must match STRING at the
beginning of a history line, otherwise a full substring match is performed
@@ -102,7 +123,7 @@ noninc_dosearch (string, dir)
char *string;
int dir;
{
- int oldpos, pos, line_len;
+ int oldpos, pos;
HIST_ENTRY *entry;
if (string == 0 || *string == '\0' || noninc_history_pos < 0)
@@ -132,19 +153,10 @@ noninc_dosearch (string, dir)
#endif
history_set_pos (oldpos);
- line_len = strlen (entry->line);
- if (line_len >= rl_line_buffer_len)
- rl_extend_line_buffer (line_len);
- strcpy (rl_line_buffer, entry->line);
+ make_history_line_current (entry);
- rl_undo_list = (UNDO_LIST *)entry->data;
- rl_end = strlen (rl_line_buffer);
rl_point = 0;
rl_clear_message ();
-
- if (saved_line_for_history)
- _rl_free_history_entry (saved_line_for_history);
- saved_line_for_history = (HIST_ENTRY *)NULL;
}
/* Search non-interactively through the history list. DIR < 0 means to
@@ -235,8 +247,7 @@ noninc_search (dir, pchar)
{
/* We want to start the search from the current history position. */
noninc_history_pos = where_history ();
- if (noninc_search_string)
- free (noninc_search_string);
+ FREE (noninc_search_string);
noninc_search_string = savestring (rl_line_buffer);
}
@@ -295,59 +306,84 @@ rl_noninc_reverse_search_again (count, key)
}
static int
-rl_history_search_internal (count, direction)
- int count, direction;
+rl_history_search_internal (count, dir)
+ int count, dir;
{
- HIST_ENTRY *temp, *old_temp;
- int line_len;
+ HIST_ENTRY *temp;
+ int ret, oldpos;
maybe_save_line ();
+ temp = (HIST_ENTRY *)NULL;
- temp = old_temp = (HIST_ENTRY *)NULL;
+ /* Search COUNT times through the history for a line whose prefix
+ matches history_search_string. When this loop finishes, TEMP,
+ if non-null, is the history line to copy into the line buffer. */
while (count)
{
- temp = (direction < 0) ? previous_history () : next_history ();
- if (temp == 0)
- break;
- /* On an empty prefix, make this the same as previous-history. */
- if (rl_point == 0)
- {
- count--;
- continue;
- }
- if (STREQN (rl_line_buffer, temp->line, rl_point))
- {
- /* Don't find multiple instances of the same line. */
- if (prev_line_found && STREQ (prev_line_found, temp->line))
- continue;
- if (direction < 0)
- old_temp = temp;
- prev_line_found = temp->line;
- count--;
- }
+ ret = noninc_search_from_pos (history_search_string, rl_history_search_pos + dir, dir);
+ if (ret == -1)
+ break;
+
+ /* Get the history entry we found. */
+ rl_history_search_pos = ret;
+ oldpos = where_history ();
+ history_set_pos (rl_history_search_pos);
+ temp = current_history ();
+ history_set_pos (oldpos);
+
+ /* Don't find multiple instances of the same line. */
+ if (prev_line_found && STREQ (prev_line_found, temp->line))
+ continue;
+ prev_line_found = temp->line;
+ count--;
}
+ /* If we didn't find anything at all, return. */
if (temp == 0)
{
- if (direction < 0 && old_temp)
- temp = old_temp;
- else
- {
- maybe_unsave_line ();
- ding ();
- return 1;
- }
+ maybe_unsave_line ();
+ ding ();
+ /* If you don't want the saved history line (last match) to show up
+ in the line buffer after the search fails, change the #if 0 to
+ #if 1 */
+#if 0
+ if (rl_point > rl_history_search_len)
+ {
+ rl_point = rl_end = rl_history_search_len;
+ rl_line_buffer[rl_end] = '\0';
+ }
+#else
+ rl_point = rl_history_search_len; /* maybe_unsave_line changes it */
+#endif
+ return 1;
}
- line_len = strlen (temp->line);
- if (line_len >= rl_line_buffer_len)
- rl_extend_line_buffer (line_len);
- strcpy (rl_line_buffer, temp->line);
- rl_undo_list = (UNDO_LIST *)temp->data;
- rl_end = line_len;
+ /* Copy the line we found into the current line buffer. */
+ make_history_line_current (temp);
+
+ rl_point = rl_history_search_len;
return 0;
}
+static void
+rl_history_search_reinit ()
+{
+ rl_history_search_pos = where_history ();
+ rl_history_search_len = rl_point;
+ prev_line_found = (char *)NULL;
+ if (rl_point)
+ {
+ if (rl_history_search_len >= history_string_size - 2)
+ {
+ history_string_size = rl_history_search_len + 2;
+ history_search_string = xrealloc (history_search_string, history_string_size);
+ }
+ history_search_string[0] = '^';
+ strncpy (history_search_string + 1, rl_line_buffer, rl_point);
+ history_search_string[rl_point + 1] = '\0';
+ }
+}
+
/* Search forward in the history for the string of characters
from the start of the line to rl_point. This is a non-incremental
search. */
@@ -357,8 +393,13 @@ rl_history_search_forward (count, ignore)
{
if (count == 0)
return (0);
- if (rl_last_func != rl_history_search_forward)
- prev_line_found = (char *)NULL;
+
+ if (rl_last_func != rl_history_search_forward &&
+ rl_last_func != rl_history_search_backward)
+ rl_history_search_reinit ();
+
+ if (rl_history_search_len == 0)
+ return (rl_get_next_history (count, ignore));
return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1));
}
@@ -371,7 +412,12 @@ rl_history_search_backward (count, ignore)
{
if (count == 0)
return (0);
- if (rl_last_func != rl_history_search_backward)
- prev_line_found = (char *)NULL;
+
+ if (rl_last_func != rl_history_search_forward &&
+ rl_last_func != rl_history_search_backward)
+ rl_history_search_reinit ();
+
+ if (rl_history_search_len == 0)
+ return (rl_get_previous_history (count, ignore));
return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1));
}