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         .type = UCIMAP_CUSTOM, \
  37         .name = #_field, \
  38         .offset = offsetof(_type, _field)
  39
  40 struct uci_sectionmap;
  41 struct uci_optmap;
  42 struct ucimap_list;
  43
  44 struct uci_map {
  45         struct uci_sectionmap **sections;
  46         unsigned int n_sections;
  47         struct list_head sdata;
  48         struct list_head fixup;
  49
  50         void *priv; /* user data */
  51 };
  52
  53 enum ucimap_type {
  54         /* types */
  55         UCIMAP_SIMPLE   = 0x00,
  56         UCIMAP_LIST     = 0x10,
  57         UCIMAP_TYPE     = 0xf0, /* type mask */
  58
  59         /* subtypes */
  60         UCIMAP_STRING   = 0x0,
  61         UCIMAP_BOOL     = 0x1,
  62         UCIMAP_INT      = 0x2,
  63         UCIMAP_SECTION  = 0x3,
  64         UCIMAP_CUSTOM   = 0x4,
  65         UCIMAP_SUBTYPE  = 0xf, /* subtype mask */
  66 };
  67
  68 union ucimap_data {
  69         int i;
  70         bool b;
  71         char *s;
  72         void *section;
  73         struct ucimap_list *list;
  74 };
  75
  76 struct uci_listmap {
  77         struct list_head list;
  78         union ucimap_data data;
  79 };
  80
  81 struct uci_sectionmap {
  82         /* type string for the uci section */
  83         const char *type;
  84
  85         /* length of the struct to map into */
  86         unsigned int alloc_len;
  87
  88         /* give the caller time to initialize the preallocated struct */
  89         int (*init)(struct uci_map *map, void *section, struct uci_section *s);
  90
  91         /* pass the fully processed struct to the callback after the section end */
  92         int (*add)(struct uci_map *map, void *section);
  93
  94         /* let the callback clean up its own stuff in the section */
  95         int (*free)(struct uci_map *map, void *section);
  96
  97         /* list of option mappings for this section */
  98         struct uci_optmap *options;
  99         unsigned int n_options;
 100         unsigned int options_size;
 101 };
 102
 103 struct uci_optmap {
 104         unsigned int offset;
 105         const char *name;
 106         enum ucimap_type type;
 107         int (*parse)(void *section, struct uci_optmap *om, union ucimap_data *data, const char *string);
 108         union {
 109                 struct {
 110                         int base;
 111                         int min;
 112                         int max;
 113                 } i;
 114                 struct {
 115                         int maxlen;
 116                 } s;
 117                 struct uci_sectionmap *sm;
 118         } data;
 119 };
 120
 121 struct ucimap_list {
 122         int n_items;
 123         union ucimap_data item[];
 124 };
 125
 126 extern int ucimap_init(struct uci_map *map);
 127 extern void ucimap_cleanup(struct uci_map *map);
 128 extern void ucimap_set_changed(void *section, void *field);
 129 extern int ucimap_store_section(struct uci_map *map, struct uci_package *p, void *section);
 130 extern void ucimap_parse(struct uci_map *map, struct uci_package *pkg);
 131