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 UCIMAP_OPTION(_type, _field) \
  36         .name = #_field, \
  37         .offset = offsetof(_type, _field)
  38
  39 struct uci_sectmap;
  40 struct uci_optmap;
  41 struct ucimap_list;
  42
  43 struct uci_map {
  44         struct uci_sectmap **sections;
  45         unsigned int n_sections;
  46         struct list_head sdata;
  47         struct list_head fixup;
  48
  49         void *priv; /* user data */
  50 };
  51
  52 enum ucimap_type {
  53         /* types */
  54         UCIMAP_SIMPLE   = 0x00,
  55         UCIMAP_LIST     = 0x10,
  56         UCIMAP_TYPE     = 0xf0, /* type mask */
  57
  58         /* subtypes */
  59         UCIMAP_STRING   = 0x0,
  60         UCIMAP_BOOL     = 0x1,
  61         UCIMAP_INT      = 0x2,
  62         UCIMAP_SECTION  = 0x3,
  63         UCIMAP_SUBTYPE  = 0xf, /* subtype mask */
  64 };
  65
  66 union ucimap_data {
  67         int i;
  68         bool b;
  69         const char *s;
  70         void *section;
  71         struct ucimap_list *list;
  72 };
  73
  74 struct uci_listmap {
  75         struct list_head list;
  76         union ucimap_data data;
  77 };
  78
  79 struct uci_sectmap {
  80         /* type string for the uci section */
  81         const char *type;
  82
  83         /* length of the struct to map into */
  84         unsigned int alloc_len;
  85
  86         /* give the caller time to initialize the preallocated struct */
  87         int (*init)(struct uci_map *map, void *section, struct uci_section *s);
  88
  89         /* pass the fully processed struct to the callback after the section end */
  90         int (*add)(struct uci_map *map, void *section);
  91
  92         /* let the callback clean up its own stuff in the section */
  93         int (*free)(struct uci_map *map, void *section);
  94
  95         /* list of option mappings for this section */
  96         struct uci_optmap *options;
  97         unsigned int n_options;
  98         unsigned int options_size;
  99 };
 100
 101 struct uci_optmap {
 102         unsigned int offset;
 103         const char *name;
 104         enum ucimap_type type;
 105         union {
 106                 struct {
 107                         int base;
 108                         int min;
 109                         int max;
 110                 } i;
 111                 struct {
 112                         int maxlen;
 113                 } s;
 114                 struct uci_sectmap *sm;
 115         } data;
 116 };
 117
 118 struct ucimap_list {
 119         int n_items;
 120         union ucimap_data item[];
 121 };
 122
 123 extern int ucimap_init(struct uci_map *map);
 124 extern void ucimap_cleanup(struct uci_map *map);
 125 extern void ucimap_set_changed(void *section, void *field);
 126 extern int ucimap_store_section(struct uci_map *map, struct uci_package *p, void *section);
 127 extern void ucimap_parse(struct uci_map *map, struct uci_package *pkg);
 128