1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* db_delete.c: dbdelete(), database delete routine.
*
* Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
* Copyright (C) 2001, 2002 Colin Watson.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Mon Aug 8 20:35:30 BST 1994 Wilf. (G.Wilford@ee.surrey.ac.uk)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "error.h"
#include "gl_list.h"
#include "xalloc.h"
#include "gettext.h"
#define _(String) gettext (String)
#include "manconfig.h"
#include "appendstr.h"
#include "debug.h"
#include "filenames.h"
#include "glcontainers.h"
#include "mydbm.h"
#include "db_storage.h"
/* Delete an entry for a page.
Again, 3 possibilities:
1) page is singular reference, just delete it :)
2) page has 2+ companions. Delete page and alter multi entry to not
point to it anymore.
3) page has 1 companion. Could do as (2), but we'd waste an entry in
the db. Should delete page, extract friend and reinsert as singular,
overwriting the old multi entry.
*/
#define NO_ENTRY 1;
int dbdelete (MYDBM_FILE dbf, const char *name, struct mandata *info)
{
datum key, cont;
memset (&key, 0, sizeof key);
memset (&cont, 0, sizeof cont);
/* get entry for info */
debug ("Attempting delete of %s(%s) entry.\n", name, info->ext);
MYDBM_SET (key, name_to_key (name));
cont = MYDBM_FETCH (dbf, key);
if (!MYDBM_DPTR (cont)) { /* 0 entries */
MYDBM_FREE_DPTR (key);
return NO_ENTRY;
} else if (*MYDBM_DPTR (cont) != '\t') { /* 1 entry */
MYDBM_DELETE (dbf, key);
MYDBM_FREE_DPTR (cont);
} else { /* 2+ entries */
gl_list_t refs;
struct name_ext this_ref, *ref;
size_t this_index;
char *multi_content = NULL;
datum multi_key;
/* Extract all of the extensions associated with
this key */
refs = list_extensions (MYDBM_DPTR (cont) + 1);
this_ref.name = name;
this_ref.ext = info->ext;
this_index = gl_list_indexof (refs, &this_ref);
if (this_index == (size_t) -1) {
gl_list_free (refs);
MYDBM_FREE_DPTR (cont);
MYDBM_FREE_DPTR (key);
return NO_ENTRY;
}
multi_key = make_multi_key (name, info->ext);
if (!MYDBM_EXISTS (dbf, multi_key)) {
error (0, 0,
_( "multi key %s does not exist"),
MYDBM_DPTR (multi_key));
gripe_corrupt_data (dbf);
}
MYDBM_DELETE (dbf, multi_key);
MYDBM_FREE_DPTR (multi_key);
gl_list_remove_at (refs, this_index);
/* If all manual pages with this name have been deleted,
we'll have to remove the key too. */
if (!gl_list_size (refs)) {
gl_list_free (refs);
MYDBM_FREE_DPTR (cont);
MYDBM_DELETE (dbf, key);
MYDBM_FREE_DPTR (key);
return 0;
}
/* create our new multi content */
multi_content = xstrdup ("");
GL_LIST_FOREACH (refs, ref)
multi_content = appendstr (multi_content,
"\t", ref->name,
"\t", ref->ext,
(void *) 0);
MYDBM_FREE_DPTR (cont);
MYDBM_SET (cont, multi_content);
if (MYDBM_REPLACE (dbf, key, cont))
gripe_replace_key (dbf, MYDBM_DPTR (key));
gl_list_free (refs);
}
MYDBM_FREE_DPTR (key);
return 0;
}
|
