OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [readline/] [history.h] - Blame information for rev 321

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn
/* history.h -- the names of functions that you can call in history. */
2
/* Copyright (C) 1989-2003 Free Software Foundation, Inc.
3
 
4
   This file contains the GNU History Library (the Library), a set of
5
   routines for managing the text of previously typed lines.
6
 
7
   The Library is free software; you can redistribute it and/or modify
8
   it under the terms of the GNU General Public License as published by
9
   the Free Software Foundation; either version 2, or (at your option)
10
   any later version.
11
 
12
   The Library is distributed in the hope that it will be useful, but
13
   WITHOUT ANY WARRANTY; without even the implied warranty of
14
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
   General Public License for more details.
16
 
17
   The GNU General Public License is often shipped with GNU software, and
18
   is generally kept in a file called COPYING or LICENSE.  If you do not
19
   have a copy of the license, write to the Free Software Foundation,
20
   59 Temple Place, Suite 330, Boston, MA 02111 USA. */
21
 
22
#ifndef _HISTORY_H_
23
#define _HISTORY_H_
24
 
25
#ifdef __cplusplus
26
extern "C" {
27
#endif
28
 
29
#include <time.h>               /* XXX - for history timestamp code */
30
 
31
#if defined READLINE_LIBRARY
32
#  include "rlstdc.h"
33
#  include "rltypedefs.h"
34
#else
35
#  include <readline/rlstdc.h>
36
#  include <readline/rltypedefs.h>
37
#endif
38
 
39
#ifdef __STDC__
40
typedef void *histdata_t;
41
#else
42
typedef char *histdata_t;
43
#endif
44
 
45
/* The structure used to store a history entry. */
46
typedef struct _hist_entry {
47
  char *line;
48
  char *timestamp;              /* char * rather than time_t for read/write */
49
  histdata_t data;
50
} HIST_ENTRY;
51
 
52
/* Size of the history-library-managed space in history entry HS. */
53
#define HISTENT_BYTES(hs)       (strlen ((hs)->line) + strlen ((hs)->timestamp))
54
 
55
/* A structure used to pass the current state of the history stuff around. */
56
typedef struct _hist_state {
57
  HIST_ENTRY **entries;         /* Pointer to the entries themselves. */
58
  int offset;                   /* The location pointer within this array. */
59
  int length;                   /* Number of elements within this array. */
60
  int size;                     /* Number of slots allocated to this array. */
61
  int flags;
62
} HISTORY_STATE;
63
 
64
/* Flag values for the `flags' member of HISTORY_STATE. */
65
#define HS_STIFLED      0x01
66
 
67
/* Initialization and state management. */
68
 
69
/* Begin a session in which the history functions might be used.  This
70
   just initializes the interactive variables. */
71
extern void using_history PARAMS((void));
72
 
73
/* Return the current HISTORY_STATE of the history. */
74
extern HISTORY_STATE *history_get_history_state PARAMS((void));
75
 
76
/* Set the state of the current history array to STATE. */
77
extern void history_set_history_state PARAMS((HISTORY_STATE *));
78
 
79
/* Manage the history list. */
80
 
81
/* Place STRING at the end of the history list.
82
   The associated data field (if any) is set to NULL. */
83
extern void add_history PARAMS((const char *));
84
 
85
/* Change the timestamp associated with the most recent history entry to
86
   STRING. */
87
extern void add_history_time PARAMS((const char *));
88
 
89
/* A reasonably useless function, only here for completeness.  WHICH
90
   is the magic number that tells us which element to delete.  The
91
   elements are numbered from 0. */
92
extern HIST_ENTRY *remove_history PARAMS((int));
93
 
94
/* Free the history entry H and return any application-specific data
95
   associated with it. */
96
extern histdata_t free_history_entry PARAMS((HIST_ENTRY *));
97
 
98
/* Make the history entry at WHICH have LINE and DATA.  This returns
99
   the old entry so you can dispose of the data.  In the case of an
100
   invalid WHICH, a NULL pointer is returned. */
101
extern HIST_ENTRY *replace_history_entry PARAMS((int, const char *, histdata_t));
102
 
103
/* Clear the history list and start over. */
104
extern void clear_history PARAMS((void));
105
 
106
/* Stifle the history list, remembering only MAX number of entries. */
107
extern void stifle_history PARAMS((int));
108
 
109
/* Stop stifling the history.  This returns the previous amount the
110
   history was stifled by.  The value is positive if the history was
111
   stifled, negative if it wasn't. */
112
extern int unstifle_history PARAMS((void));
113
 
114
/* Return 1 if the history is stifled, 0 if it is not. */
115
extern int history_is_stifled PARAMS((void));
116
 
117
/* Information about the history list. */
118
 
119
/* Return a NULL terminated array of HIST_ENTRY which is the current input
120
   history.  Element 0 of this list is the beginning of time.  If there
121
   is no history, return NULL. */
122
extern HIST_ENTRY **history_list PARAMS((void));
123
 
124
/* Returns the number which says what history element we are now
125
   looking at.  */
126
extern int where_history PARAMS((void));
127
 
128
/* Return the history entry at the current position, as determined by
129
   history_offset.  If there is no entry there, return a NULL pointer. */
130
extern HIST_ENTRY *current_history PARAMS((void));
131
 
132
/* Return the history entry which is logically at OFFSET in the history
133
   array.  OFFSET is relative to history_base. */
134
extern HIST_ENTRY *history_get PARAMS((int));
135
 
136
/* Return the timestamp associated with the HIST_ENTRY * passed as an
137
   argument */
138
extern time_t history_get_time PARAMS((HIST_ENTRY *));
139
 
140
/* Return the number of bytes that the primary history entries are using.
141
   This just adds up the lengths of the_history->lines. */
142
extern int history_total_bytes PARAMS((void));
143
 
144
/* Moving around the history list. */
145
 
146
/* Set the position in the history list to POS. */
147
extern int history_set_pos PARAMS((int));
148
 
149
/* Back up history_offset to the previous history entry, and return
150
   a pointer to that entry.  If there is no previous entry, return
151
   a NULL pointer. */
152
extern HIST_ENTRY *previous_history PARAMS((void));
153
 
154
/* Move history_offset forward to the next item in the input_history,
155
   and return the a pointer to that entry.  If there is no next entry,
156
   return a NULL pointer. */
157
extern HIST_ENTRY *next_history PARAMS((void));
158
 
159
/* Searching the history list. */
160
 
161
/* Search the history for STRING, starting at history_offset.
162
   If DIRECTION < 0, then the search is through previous entries,
163
   else through subsequent.  If the string is found, then
164
   current_history () is the history entry, and the value of this function
165
   is the offset in the line of that history entry that the string was
166
   found in.  Otherwise, nothing is changed, and a -1 is returned. */
167
extern int history_search PARAMS((const char *, int));
168
 
169
/* Search the history for STRING, starting at history_offset.
170
   The search is anchored: matching lines must begin with string.
171
   DIRECTION is as in history_search(). */
172
extern int history_search_prefix PARAMS((const char *, int));
173
 
174
/* Search for STRING in the history list, starting at POS, an
175
   absolute index into the list.  DIR, if negative, says to search
176
   backwards from POS, else forwards.
177
   Returns the absolute index of the history element where STRING
178
   was found, or -1 otherwise. */
179
extern int history_search_pos PARAMS((const char *, int, int));
180
 
181
/* Managing the history file. */
182
 
183
/* Add the contents of FILENAME to the history list, a line at a time.
184
   If FILENAME is NULL, then read from ~/.history.  Returns 0 if
185
   successful, or errno if not. */
186
extern int read_history PARAMS((const char *));
187
 
188
/* Read a range of lines from FILENAME, adding them to the history list.
189
   Start reading at the FROM'th line and end at the TO'th.  If FROM
190
   is zero, start at the beginning.  If TO is less than FROM, read
191
   until the end of the file.  If FILENAME is NULL, then read from
192
   ~/.history.  Returns 0 if successful, or errno if not. */
193
extern int read_history_range PARAMS((const char *, int, int));
194
 
195
/* Write the current history to FILENAME.  If FILENAME is NULL,
196
   then write the history list to ~/.history.  Values returned
197
   are as in read_history ().  */
198
extern int write_history PARAMS((const char *));
199
 
200
/* Append NELEMENT entries to FILENAME.  The entries appended are from
201
   the end of the list minus NELEMENTs up to the end of the list. */
202
extern int append_history PARAMS((int, const char *));
203
 
204
/* Truncate the history file, leaving only the last NLINES lines. */
205
extern int history_truncate_file PARAMS((const char *, int));
206
 
207
/* History expansion. */
208
 
209
/* Expand the string STRING, placing the result into OUTPUT, a pointer
210
   to a string.  Returns:
211
 
212
   0) If no expansions took place (or, if the only change in
213
      the text was the de-slashifying of the history expansion
214
      character)
215
   1) If expansions did take place
216
  -1) If there was an error in expansion.
217
   2) If the returned line should just be printed.
218
 
219
  If an error ocurred in expansion, then OUTPUT contains a descriptive
220
  error message. */
221
extern int history_expand PARAMS((char *, char **));
222
 
223
/* Extract a string segment consisting of the FIRST through LAST
224
   arguments present in STRING.  Arguments are broken up as in
225
   the shell. */
226
extern char *history_arg_extract PARAMS((int, int, const char *));
227
 
228
/* Return the text of the history event beginning at the current
229
   offset into STRING.  Pass STRING with *INDEX equal to the
230
   history_expansion_char that begins this specification.
231
   DELIMITING_QUOTE is a character that is allowed to end the string
232
   specification for what to search for in addition to the normal
233
   characters `:', ` ', `\t', `\n', and sometimes `?'. */
234
extern char *get_history_event PARAMS((const char *, int *, int));
235
 
236
/* Return an array of tokens, much as the shell might.  The tokens are
237
   parsed out of STRING. */
238
extern char **history_tokenize PARAMS((const char *));
239
 
240
/* Exported history variables. */
241
extern int history_base;
242
extern int history_length;
243
extern int history_max_entries;
244
extern char history_expansion_char;
245
extern char history_subst_char;
246
extern char *history_word_delimiters;
247
extern char history_comment_char;
248
extern char *history_no_expand_chars;
249
extern char *history_search_delimiter_chars;
250
extern int history_quotes_inhibit_expansion;
251
 
252
extern int history_write_timestamps;
253
 
254
/* Backwards compatibility */
255
extern int max_input_history;
256
 
257
/* If set, this function is called to decide whether or not a particular
258
   history expansion should be treated as a special case for the calling
259
   application and not expanded. */
260
extern rl_linebuf_func_t *history_inhibit_expansion_function;
261
 
262
#ifdef __cplusplus
263
}
264
#endif
265
 
266
#endif /* !_HISTORY_H_ */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.