Adding upstream version 5.2.15.upstream/5.2.15upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 291 insertions, 0 deletions

diff --git a/lib/readline/history.h b/lib/readline/history.h
new file mode 100644
index 0000000..5208f9a
--- /dev/null
+++ b/lib/readline/history.h
@@ -0,0 +1,291 @@
+/* history.h -- the names of functions that you can call in history. */
+
+/* Copyright (C) 1989-2022 Free Software Foundation, Inc.
+
+   This file contains the GNU History Library (History), a set of
+   routines for managing the text of previously typed lines.
+
+   History 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 3 of the License, or
+   (at your option) any later version.
+
+   History 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 History.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _HISTORY_H_
+#define _HISTORY_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <time.h>		/* XXX - for history timestamp code */
+
+#if defined READLINE_LIBRARY
+#  include "rlstdc.h"
+#  include "rltypedefs.h"
+#else
+#  include <readline/rlstdc.h>
+#  include <readline/rltypedefs.h>
+#endif
+
+#ifdef __STDC__
+typedef void *histdata_t;
+#else
+typedef char *histdata_t;
+#endif
+
+/* Let's not step on anyone else's define for now, since we don't use this yet. */
+#ifndef HS_HISTORY_VERSION
+#  define HS_HISTORY_VERSION 0x0802	/* History 8.2 */
+#endif
+
+/* The structure used to store a history entry. */
+typedef struct _hist_entry {
+  char *line;
+  char *timestamp;		/* char * rather than time_t for read/write */
+  histdata_t data;
+} HIST_ENTRY;
+
+/* Size of the history-library-managed space in history entry HS. */
+#define HISTENT_BYTES(hs)	(strlen ((hs)->line) + strlen ((hs)->timestamp))
+
+/* A structure used to pass the current state of the history stuff around. */
+typedef struct _hist_state {
+  HIST_ENTRY **entries;		/* Pointer to the entries themselves. */
+  int offset;			/* The location pointer within this array. */
+  int length;			/* Number of elements within this array. */
+  int size;			/* Number of slots allocated to this array. */
+  int flags;
+} HISTORY_STATE;
+
+/* Flag values for the `flags' member of HISTORY_STATE. */
+#define HS_STIFLED	0x01
+
+/* Initialization and state management. */
+
+/* Begin a session in which the history functions might be used.  This
+   just initializes the interactive variables. */
+extern void using_history (void);
+
+/* Return the current HISTORY_STATE of the history. */
+extern HISTORY_STATE *history_get_history_state (void);
+
+/* Set the state of the current history array to STATE. */
+extern void history_set_history_state (HISTORY_STATE *);
+
+/* Manage the history list. */
+
+/* Place STRING at the end of the history list.
+   The associated data field (if any) is set to NULL. */
+extern void add_history (const char *);
+
+/* Change the timestamp associated with the most recent history entry to
+   STRING. */
+extern void add_history_time (const char *);
+
+/* Remove an entry from the history list.  WHICH is the magic number that
+   tells us which element to delete.  The elements are numbered from 0. */
+extern HIST_ENTRY *remove_history (int);
+
+/* Remove a set of entries from the history list: FIRST to LAST, inclusive */
+extern HIST_ENTRY **remove_history_range (int, int);
+
+/* Allocate a history entry consisting of STRING and TIMESTAMP and return
+   a pointer to it. */
+extern HIST_ENTRY *alloc_history_entry (char *, char *);
+
+/* Copy the history entry H, but not the (opaque) data pointer */
+extern HIST_ENTRY *copy_history_entry (HIST_ENTRY *);
+
+/* Free the history entry H and return any application-specific data
+   associated with it. */
+extern histdata_t free_history_entry (HIST_ENTRY *);
+
+/* Make the history entry at WHICH have LINE and DATA.  This returns
+   the old entry so you can dispose of the data.  In the case of an
+   invalid WHICH, a NULL pointer is returned. */
+extern HIST_ENTRY *replace_history_entry (int, const char *, histdata_t);
+
+/* Clear the history list and start over. */
+extern void clear_history (void);
+
+/* Stifle the history list, remembering only MAX number of entries. */
+extern void stifle_history (int);
+
+/* Stop stifling the history.  This returns the previous amount the
+   history was stifled by.  The value is positive if the history was
+   stifled, negative if it wasn't. */
+extern int unstifle_history (void);
+
+/* Return 1 if the history is stifled, 0 if it is not. */
+extern int history_is_stifled (void);
+
+/* Information about the history list. */
+
+/* Return a NULL terminated array of HIST_ENTRY which is the current input
+   history.  Element 0 of this list is the beginning of time.  If there
+   is no history, return NULL. */
+extern HIST_ENTRY **history_list (void);
+
+/* Returns the number which says what history element we are now
+   looking at.  */
+extern int where_history (void);
+  
+/* Return the history entry at the current position, as determined by
+   history_offset.  If there is no entry there, return a NULL pointer. */
+extern HIST_ENTRY *current_history (void);
+
+/* Return the history entry which is logically at OFFSET in the history
+   array.  OFFSET is relative to history_base. */
+extern HIST_ENTRY *history_get (int);
+
+/* Return the timestamp associated with the HIST_ENTRY * passed as an
+   argument */
+extern time_t history_get_time (HIST_ENTRY *);
+
+/* Return the number of bytes that the primary history entries are using.
+   This just adds up the lengths of the_history->lines. */
+extern int history_total_bytes (void);
+
+/* Moving around the history list. */
+
+/* Set the position in the history list to POS. */
+extern int history_set_pos (int);
+
+/* Back up history_offset to the previous history entry, and return
+   a pointer to that entry.  If there is no previous entry, return
+   a NULL pointer. */
+extern HIST_ENTRY *previous_history (void);
+
+/* Move history_offset forward to the next item in the input_history,
+   and return the a pointer to that entry.  If there is no next entry,
+   return a NULL pointer. */
+extern HIST_ENTRY *next_history (void);
+
+/* Searching the history list. */
+
+/* Search the history for STRING, starting at history_offset.
+   If DIRECTION < 0, then the search is through previous entries,
+   else through subsequent.  If the string is found, then
+   current_history () is the history entry, and the value of this function
+   is the offset in the line of that history entry that the string was
+   found in.  Otherwise, nothing is changed, and a -1 is returned. */
+extern int history_search (const char *, int);
+
+/* Search the history for STRING, starting at history_offset.
+   The search is anchored: matching lines must begin with string.
+   DIRECTION is as in history_search(). */
+extern int history_search_prefix (const char *, int);
+
+/* Search for STRING in the history list, starting at POS, an
+   absolute index into the list.  DIR, if negative, says to search
+   backwards from POS, else forwards.
+   Returns the absolute index of the history element where STRING
+   was found, or -1 otherwise. */
+extern int history_search_pos (const char *, int, int);
+
+/* Managing the history file. */
+
+/* Add the contents of FILENAME to the history list, a line at a time.
+   If FILENAME is NULL, then read from ~/.history.  Returns 0 if
+   successful, or errno if not. */
+extern int read_history (const char *);
+
+/* Read a range of lines from FILENAME, adding them to the history list.
+   Start reading at the FROM'th line and end at the TO'th.  If FROM
+   is zero, start at the beginning.  If TO is less than FROM, read
+   until the end of the file.  If FILENAME is NULL, then read from
+   ~/.history.  Returns 0 if successful, or errno if not. */
+extern int read_history_range (const char *, int, int);
+
+/* Write the current history to FILENAME.  If FILENAME is NULL,
+   then write the history list to ~/.history.  Values returned
+   are as in read_history ().  */
+extern int write_history (const char *);
+
+/* Append NELEMENT entries to FILENAME.  The entries appended are from
+   the end of the list minus NELEMENTs up to the end of the list. */
+extern int append_history (int, const char *);
+
+/* Truncate the history file, leaving only the last NLINES lines. */
+extern int history_truncate_file (const char *, int);
+
+/* History expansion. */
+
+/* Expand the string STRING, placing the result into OUTPUT, a pointer
+   to a string.  Returns:
+
+   0) If no expansions took place (or, if the only change in
+      the text was the de-slashifying of the history expansion
+      character)
+   1) If expansions did take place
+  -1) If there was an error in expansion.
+   2) If the returned line should just be printed.
+
+  If an error occurred in expansion, then OUTPUT contains a descriptive
+  error message. */
+extern int history_expand (char *, char **);
+
+/* Extract a string segment consisting of the FIRST through LAST
+   arguments present in STRING.  Arguments are broken up as in
+   the shell. */
+extern char *history_arg_extract (int, int, const char *);
+
+/* Return the text of the history event beginning at the current
+   offset into STRING.  Pass STRING with *INDEX equal to the
+   history_expansion_char that begins this specification.
+   DELIMITING_QUOTE is a character that is allowed to end the string
+   specification for what to search for in addition to the normal
+   characters `:', ` ', `\t', `\n', and sometimes `?'. */
+extern char *get_history_event (const char *, int *, int);
+
+/* Return an array of tokens, much as the shell might.  The tokens are
+   parsed out of STRING. */
+extern char **history_tokenize (const char *);
+
+/* Exported history variables. */
+extern int history_base;
+extern int history_length;
+extern int history_max_entries;
+extern int history_offset;
+
+extern int history_lines_read_from_file;
+extern int history_lines_written_to_file;
+
+extern char history_expansion_char;
+extern char history_subst_char;
+extern char *history_word_delimiters;
+extern char history_comment_char;
+extern char *history_no_expand_chars;
+extern char *history_search_delimiter_chars;
+
+extern int history_quotes_inhibit_expansion;
+extern int history_quoting_state;
+
+extern int history_write_timestamps;
+
+/* These two are undocumented; the second is reserved for future use */
+extern int history_multiline_entries;
+extern int history_file_version;
+
+/* Backwards compatibility */
+extern int max_input_history;
+
+/* If set, this function is called to decide whether or not a particular
+   history expansion should be treated as a special case for the calling
+   application and not expanded. */
+extern rl_linebuf_func_t *history_inhibit_expansion_function;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !_HISTORY_H_ */