ucimap.h

   1 /*
   2  * ucimap - library for mapping uci sections into data structures
   3  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   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 version 2
   7  * as published by the Free Software Foundation
   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 #include <stdbool.h>
  15 #include "uci_list.h"
  16 #include "uci.h"
  17
  18 #ifndef ARRAY_SIZE
  19 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  20 #endif
  21
  22 #define BITFIELD_SIZE(_fields) (((_fields) / 8) + 1)
  23
  24 #define CLR_BIT(_name, _bit) do { \
  25         _name[(_bit) / 8] &= ~(1 << ((_bit) % 8)); \
  26 } while (0)
  27
  28 #define SET_BIT(_name, _bit) do { \
  29         _name[(_bit) / 8] |=  (1 << ((_bit) % 8)); \
  30 } while (0)
  31
  32 #define TEST_BIT(_name, _bit) \
  33         (_name[(_bit) / 8] & (1 << ((_bit) % 8)))
  34
  35 #define OPTMAP_OPTION(_maptype, _type, _field, ...) \
  36         { \
  37                 .type = _maptype, \
  38                 .name = #_field, \
  39                 .offset = offsetof(_type, _field), \
  40                 __VA_ARGS__  \
  41         }
  42
  43 struct uci_sectmap;
  44 struct uci_optmap;
  45
  46 struct uci_map {
  47         struct uci_sectmap **sections;
  48         unsigned int n_sections;
  49         struct list_head sdata;
  50         struct list_head fixup;
  51
  52         void *priv; /* user data */
  53 };
  54
  55 enum ucimap_type {
  56         /* types */
  57         UCIMAP_SIMPLE   = 0x00,
  58         UCIMAP_LIST     = 0x10,
  59         UCIMAP_TYPE     = 0xf0, /* type mask */
  60
  61         /* subtypes */
  62         UCIMAP_STRING   = 0x0,
  63         UCIMAP_BOOL     = 0x1,
  64         UCIMAP_INT      = 0x2,
  65         UCIMAP_SECTION  = 0x3,
  66         UCIMAP_SUBTYPE  = 0xf, /* subtype mask */
  67 };
  68
  69 union uci_datamap {
  70         int i;
  71         bool b;
  72         const char *s;
  73         void *section;
  74         struct list_head list;
  75 };
  76
  77 struct uci_listmap {
  78         struct list_head list;
  79         union uci_datamap data;
  80 };
  81
  82 struct uci_sectmap {
  83         /* type string for the uci section */
  84         const char *type;
  85
  86         /* length of the struct to map into */
  87         unsigned int alloc_len;
  88
  89         /* give the caller time to initialize the preallocated struct */
  90         int (*init_section)(struct uci_map *map, void *section, struct uci_section *s);
  91
  92         /* pass the fully processed struct to the callback after the section end */
  93         int (*add_section)(struct uci_map *map, void *section);
  94
  95         /* let the callback clean up its own stuff in the section */
  96         int (*free_section)(struct uci_map *map, void *section);
  97
  98         /* list of option mappings for this section */
  99         struct uci_optmap *options;
 100         unsigned int n_options;
 101 };
 102
 103 struct uci_optmap {
 104         unsigned int offset;
 105         const char *name;
 106         enum ucimap_type type;
 107         union {
 108                 struct {
 109                         int base;
 110                         int min;
 111                         int max;
 112                 } i;
 113                 struct {
 114                         int maxlen;
 115                 } s;
 116                 struct uci_sectmap *sm;
 117         } data;
 118 };
 119
 120 extern int ucimap_init(struct uci_map *map);
 121 extern void ucimap_cleanup(struct uci_map *map);
 122 extern void ucimap_set_changed(void *section, void *field);
 123 extern int ucimap_store_section(struct uci_map *map, struct uci_package *p, void *section);
 124 extern void ucimap_parse(struct uci_map *map, struct uci_package *pkg);
 125