5cb2643d3c43c8fa4e36adefe3789c3a9700a353
[util-vserver.git] / lib / val2text.hc
1 // $Id: val2text.hc 2651 2008-01-03 15:33:01Z dhozac $    --*- c -*--
2
3 // Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
4 //  
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; version 2 of the License.
8 //  
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 //  
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18
19 #ifdef HAVE_CONFIG_H
20 #  include <config.h>
21 #endif
22
23 #include <stdlib.h>
24 #include <string.h>
25 #include <strings.h>
26
27 #define VAL2TEXT(TYPE,SHORT)                                            \
28   ssize_t                                                               \
29   utilvserver_value2text_##SHORT(char const *str, size_t len,           \
30                                  struct Mapping_ ##SHORT const *map,    \
31                                  size_t map_len)                        \
32   {                                                                     \
33     size_t      i;                                                      \
34     if (len==0) len=strlen(str);                                        \
35                                                                         \
36     for (i=0; i<map_len; ++i)                                           \
37       if (len==map[i].len &&                                            \
38           strncasecmp(map[i].id, str, len)==0)                          \
39         return i;                                                       \
40                                                                         \
41     return -1;                                                          \
42   }
43
44 #define TEXT2VAL(TYPE,SHORT)                                            \
45   static ssize_t                                                        \
46   searchValue(TYPE val,                                                 \
47               struct Mapping_##SHORT const *map,  size_t map_len)       \
48   {                                                                     \
49     size_t              i;                                              \
50     for (i=0; i<map_len; ++i)                                           \
51       if (val == map[i].val) return i;                                  \
52     return -1;                                                          \
53   }                                                                     \
54                                                                         \
55   ssize_t                                                               \
56   utilvserver_text2value_##SHORT(TYPE *val,                             \
57                                  struct Mapping_##SHORT const *map,     \
58                                  size_t map_len)                        \
59   {                                                                     \
60     ssize_t     idx;                                                    \
61     TYPE        del_val;                                                \
62     if (*val==0)                                                        \
63       return -1;                                                        \
64                                                                         \
65     del_val = *val;                                                     \
66     idx     = searchValue(del_val, map, map_len);                       \
67                                                                         \
68     if (idx==-1) {                                                      \
69       size_t    i;                                                      \
70       for (i=0; i<sizeof(*val)*8 && (*val&((TYPE)1<<i))==0; ++i) {}     \
71       del_val = ((TYPE)1<<i);                                           \
72       idx     = searchValue(del_val, map, map_len);                     \
73     }                                                                   \
74     if (idx!=-1)                                                        \
75       *val &= ~del_val;                                                 \
76     return idx;                                                         \
77   }