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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/*
* str_list.h
*
* String list macros.
*
* Copyright (C) 2004,2005 Martin Schlemmer <azarah@nosferatu.za.org>
*
*
* This program 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 version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Header$
*/
#ifndef __STR_LIST_H__
#define __STR_LIST_H__
/* Add a new item to a string list. If the pointer to the list is NULL,
* allocate enough memory for the amount of entries needed. Ditto for
* when it already exists, but we add one more entry than it can
* contain. The list is NULL terminated.
* NOTE: _only_ memory for the list are allocated, and not for the items - that
* should be done by relevant code (unlike str_list_del_item() that will
* free the memory) */
#define str_list_add_item(_string_list, _item, _error) \
do { \
char **_tmp_p; \
int _i = 0; \
if (!check_str (_item)) \
{ \
goto _error; \
} \
while ((NULL != _string_list) && (NULL != _string_list[_i])) \
{ \
_i++; \
} \
/* Amount of entries + new + terminator */ \
_tmp_p = xrealloc (_string_list, sizeof (char *) * (_i + 2)); \
if (NULL == _tmp_p) \
{ \
goto _error; \
} \
_string_list = _tmp_p; \
_string_list[_i] = _item; \
/* Terminator */ \
_string_list[_i+1] = NULL; \
} while (0)
/* Add a new item to a string list (foundamental the same as above), but make
* sure we have all the items alphabetically sorted. */
#define str_list_add_item_sorted(_string_list, _item, _error) \
do { \
char **_tmp_p; \
char *_str_p1; \
char *_str_p2; \
int _i = 0; \
if (!check_str (_item)) \
{ \
goto _error; \
} \
while ((NULL != _string_list) && (NULL != _string_list[_i])) \
{ \
_i++; \
} \
/* Amount of entries + new + terminator */ \
_tmp_p = xrealloc (_string_list, sizeof (char *) * (_i + 2)); \
if (NULL == _tmp_p) \
{ \
goto _error; \
} \
_string_list = _tmp_p; \
if (0 == _i) \
{ \
/* Needed so that the end NULL will propagate
* (iow, make sure our 'NULL != _str_p1' test below
* do not fail) */ \
_string_list[_i] = NULL; \
} \
/* Actual terminator that needs adding */ \
_string_list[_i+1] = NULL; \
_i = 0; \
/* See where we should insert the new item to have it all \
* alphabetically sorted */ \
while (NULL != _string_list[_i]) \
{ \
if (strcmp (_string_list[_i], _item) > 0) \
{ \
break; \
} \
_i++; \
} \
/* Now just insert the new item, and shift the rest one over.
* '_str_p2' is temporary storage to swap the indexes in a loop,
* and 'str_p1' is used to store the old value across the loop */ \
_str_p1 = _string_list[_i]; \
_string_list[_i] = _item; \
do { \
_i++;\
_str_p2 = _string_list[_i]; \
_string_list[_i] = _str_p1; \
_str_p1 = _str_p2; \
} while (NULL != _str_p1); \
} while (0)
/* Delete one entry from the string list, and shift the rest down if the entry
* was not at the end. For now we do not resize the amount of entries the
* string list can contain, and free the memory for the matching item */
#define str_list_del_item(_string_list, _item, _error) \
do { \
int _i = 0; \
if (!check_str (_item)) \
{ \
goto _error; \
} \
if (NULL == _string_list) \
{ \
errno = EINVAL; \
DBG_MSG ("Invalid string list passed!\n"); \
goto _error; \
} \
while (NULL != _string_list[_i]) \
{ \
if (0 == strcmp (_item, _string_list[_i])) \
{ \
break; \
} \
else \
{ \
_i++; \
} \
} \
if (NULL == _string_list[_i]) \
{ \
errno = EINVAL; \
DBG_MSG ("Invalid string list item passed!\n"); \
goto _error; \
} \
free (_string_list[_i]); \
/* Shift all the following items one forward */ \
do { \
_string_list[_i] = _string_list[_i+1]; \
/* This stupidity is to shutup gcc */ \
_i++; \
} while (NULL != _string_list[_i]); \
} while (0)
/* Step through each entry in the string list, setting '_pos' to the
* beginning of the entry. '_counter' is used by the macro as index,
* but should not be used by code as index (or if really needed, then
* it should usually by +1 from what you expect, and should only be
* used in the scope of the macro) */
#define str_list_for_each_item(_string_list, _pos, _counter) \
if ((NULL != _string_list) && (0 == (_counter = 0))) \
while (NULL != (_pos = _string_list[_counter++]))
/* Same as above (with the same warning about '_counter'). Now we just
* have '_next' that are also used for indexing. Once again rather refrain
* from using it if not absolutely needed. The major difference to above,
* is that it should be safe from having the item removed from under you. */
#define str_list_for_each_item_safe(_string_list, _pos, _next, _counter) \
if ((NULL != _string_list) && (0 == (_counter = 0))) \
/* First part of the while checks if this is the
* first loop, and if so setup _pos and _next
* and increment _counter */ \
while ((((0 == _counter) \
&& (NULL != (_pos = _string_list[_counter])) \
&& (_pos != (_next = _string_list[++_counter]))) \
/* Second part is when it is not the first loop
* and _pos was not removed from under us. We
* just increment _counter, and setup _pos and
* _next */ \
|| ((0 != _counter) \
&& (_pos == _string_list[_counter-1]) \
&& (_next == _string_list[_counter]) \
&& (NULL != (_pos = _string_list[_counter])) \
&& (_pos != (_next = _string_list[++_counter]))) \
/* Last part is when _pos was removed from under
* us. We basically just setup _pos and _next,
* but leave _counter alone */ \
|| ((0 != _counter) \
&& (_pos != _string_list[_counter-1]) \
&& (_next == _string_list[_counter-1]) \
&& (NULL != (_pos = _string_list[_counter-1])) \
&& (_pos != (_next = _string_list[_counter])))))
/* Just free the whole string list */
#define str_list_free(_string_list) \
do { \
if (NULL != _string_list) \
{ \
int _i = 0; \
while (NULL != _string_list[_i]) \
{ \
free (_string_list[_i]); \
_string_list[_i++] = NULL; \
} \
free (_string_list); \
_string_list = NULL; \
} \
} while (0)
#endif /* __STR_LIST_H__ */
|