added '^' modifier which marks bit numbers
[util-vserver.git] / util-vserver / lib / listparser.hc
1 // $Id$    --*- 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 TONUMBER_uint64(S,E,B)          strtoll(S,E,B)
28 #define TONUMBER_uint32(S,E,B)          strtol (S,E,B)
29
30 #define ISNUMBER(TYPE,SHORT)                                            \
31   static inline ALWAYSINLINE bool                                       \
32   isNumber_##SHORT(char const *str,TYPE *res, char end_chr)             \
33   {                                                                     \
34     char        *err_ptr;                                               \
35     if (*str=='^')                                                      \
36       *res = ((TYPE)(1)) << TONUMBER_##SHORT(str+1, &err_ptr, 0);       \
37     else                                                                \
38       *res = TONUMBER_##SHORT(str, &err_ptr, 0);                        \
39     return err_ptr>str && *err_ptr==end_chr;                            \
40   }
41
42
43 #define LISTPARSER(TYPE,SHORT)                                          \
44   ISNUMBER(TYPE,SHORT)                                                  \
45   int                                                                   \
46   utilvserver_listparser_ ## SHORT(char const *str, size_t len,         \
47                                    char const **err_ptr,                \
48                                    size_t *err_len,                     \
49                                    TYPE *flag,                          \
50                                    TYPE *mask,                          \
51                                    TYPE (*func)(char const *, size_t))  \
52   {                                                                     \
53     if (len==0) len = strlen(str);                                      \
54     for (;len>0;) {                                                     \
55       char const        *ptr = strchr(str, ',');                        \
56       size_t            cnt;                                            \
57       TYPE              tmp;                                            \
58       bool              is_neg;                                         \
59                                                                         \
60       is_neg = *str=='!' || *str=='~';                                  \
61       if (is_neg) {                                                     \
62         ++str;                                                          \
63         --len;                                                          \
64       }                                                                 \
65                                                                         \
66       cnt = ptr ? (size_t)(ptr-str) : len;                              \
67       if (cnt>=len) { cnt=len; len=0; }                                 \
68       else len-=(cnt+1);                                                \
69                                                                         \
70       if (cnt==0)                                                       \
71         tmp = 0;                                                        \
72       else if (strncasecmp(str,"all",cnt)==0 ||                         \
73                strncasecmp(str,"any",cnt)==0)                           \
74         tmp = ~(TYPE)(0);                                               \
75       else if (!isNumber_##SHORT(str, &tmp, str[cnt]))                  \
76         tmp = (*func)(str,cnt);                                         \
77                                                                         \
78       if (tmp!=0) {                                                     \
79         if (!is_neg) *flag |=  tmp;                                     \
80         else         *flag &= ~tmp;                                     \
81         *mask |= tmp;                                                   \
82       }                                                                 \
83       else {                                                            \
84         if (err_ptr) *err_ptr = str;                                    \
85         if (err_len) *err_len = cnt;                                    \
86         return -1;                                                      \
87       }                                                                 \
88                                                                         \
89       if (ptr==0) break;                                                \
90       str = ptr+1;                                                      \
91     }                                                                   \
92                                                                         \
93     if (err_ptr) *err_ptr = 0;                                          \
94     if (err_len) *err_len = 0;                                          \
95     return 0;                                                           \
96   }