1/* histexamp.c - history library example program. */
2
3/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
4
5   This file is part of the GNU Readline Library (Readline), a library for
6   reading lines of text with interactive input and history editing.
7
8   Readline is free software: you can redistribute it and/or modify
9   it under the terms of the GNU General Public License as published by
10   the Free Software Foundation, either version 3 of the License, or
11   (at your option) any later version.
12
13   Readline is distributed in the hope that it will be useful,
14   but WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   GNU General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with Readline.  If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include <stdio.h>
23
24#ifdef READLINE_LIBRARY
25#  include "history.h"
26#else
27#  include <readline/history.h>
28#endif
29
30#include <string.h>
31
32main (argc, argv)
33     int argc;
34     char **argv;
35{
36  char line[1024], *t;
37  int len, done;
38
39  line[0] = 0;
40  done = 0;
41
42  using_history ();
43  while (!done)
44    {
45      printf ("history$ ");
46      fflush (stdout);
47      t = fgets (line, sizeof (line) - 1, stdin);
48      if (t && *t)
49	{
50	  len = strlen (t);
51	  if (t[len - 1] == '\n')
52	    t[len - 1] = '\0';
53	}
54
55      if (!t)
56	strcpy (line, "quit");
57
58      if (line[0])
59	{
60	  char *expansion;
61	  int result;
62
63	  using_history ();
64
65	  result = history_expand (line, &expansion);
66	  if (result)
67	    fprintf (stderr, "%s\n", expansion);
68
69	  if (result < 0 || result == 2)
70	    {
71	      free (expansion);
72	      continue;
73	    }
74
75	  add_history (expansion);
76	  strncpy (line, expansion, sizeof (line) - 1);
77	  free (expansion);
78	}
79
80      if (strcmp (line, "quit") == 0)
81	done = 1;
82      else if (strcmp (line, "save") == 0)
83	write_history ("history_file");
84      else if (strcmp (line, "read") == 0)
85	read_history ("history_file");
86      else if (strcmp (line, "list") == 0)
87	{
88	  register HIST_ENTRY **the_list;
89	  register int i;
90	  time_t tt;
91	  char timestr[128];
92
93	  the_list = history_list ();
94	  if (the_list)
95	    for (i = 0; the_list[i]; i++)
96	      {
97	      	tt = history_get_time (the_list[i]);
98		if (tt)
99		  strftime (timestr, sizeof (timestr), "%a %R", localtime(&tt));
100		else
101		  strcpy (timestr, "??");
102	        printf ("%d: %s: %s\n", i + history_base, timestr, the_list[i]->line);
103	      }
104	}
105      else if (strncmp (line, "delete", 6) == 0)
106	{
107	  int which;
108	  if ((sscanf (line + 6, "%d", &which)) == 1)
109	    {
110	      HIST_ENTRY *entry = remove_history (which);
111	      if (!entry)
112		fprintf (stderr, "No such entry %d\n", which);
113	      else
114		{
115		  free (entry->line);
116		  free (entry);
117		}
118	    }
119	  else
120	    {
121	      fprintf (stderr, "non-numeric arg given to `delete'\n");
122	    }
123	}
124    }
125}
126