9 // The struct that will be loaded and saved.
10 // note that only the members described in the eet_data_descriptor
11 // will be automatically handled. The other members will have their
12 // space reserved and zeroed (as it uses calloc()), but not
13 // saved or loaded from eet files.
15 unsigned int version; // it is recommended to use versioned configuration!
18 int not_saved_value; // example of not saved data inside!
28 // string that represents the entry in eet file, you might like to have
29 // different profiles or so in the same file, this is possible with
31 static const char MY_CONF_FILE_ENTRY[] = "config";
34 // keep the descriptor static global, so it can be
35 // shared by different functions (load/save) of this and only this
37 static Eet_Data_Descriptor *_my_conf_descriptor;
38 static Eet_Data_Descriptor *_my_conf_sub_descriptor;
41 _my_conf_descriptor_init(void)
43 Eet_Data_Descriptor_Class eddc;
45 // The class describe the functions to use to create the type and its
46 // full allocated size.
48 // Eina types are very convenient, so use them to create the descriptor,
49 // so we get eina_list, eina_hash and eina_stringshare automatically!
51 // The STREAM variant is better for configuration files as the values
52 // will likely change a lot.
54 // The other variant, FILE, is good for caches and things that are just
55 // appended, but needs to take care when changing strings and files must
56 // be kept open so mmap()ed strings will be kept alive.
57 EET_EINA_STREAM_DATA_DESCRIPTOR_CLASS_SET(&eddc, My_Conf_Type);
58 _my_conf_descriptor = eet_data_descriptor_stream_new(&eddc);
60 EET_EINA_STREAM_DATA_DESCRIPTOR_CLASS_SET(&eddc, My_Conf_Subtype);
61 _my_conf_sub_descriptor = eet_data_descriptor_stream_new(&eddc);
63 // Describe the members to be saved:
64 // Use a temporary macro so we don't type a lot, also avoid errors:
65 #define MY_CONF_ADD_BASIC(member, eet_type) \
66 EET_DATA_DESCRIPTOR_ADD_BASIC \
67 (_my_conf_descriptor, My_Conf_Type, #member, member, eet_type)
68 #define MY_CONF_SUB_ADD_BASIC(member, eet_type) \
69 EET_DATA_DESCRIPTOR_ADD_BASIC \
70 (_my_conf_sub_descriptor, My_Conf_Subtype, #member, member, eet_type)
72 MY_CONF_SUB_ADD_BASIC(server, EET_T_STRING);
73 MY_CONF_SUB_ADD_BASIC(port, EET_T_INT);
75 MY_CONF_ADD_BASIC(version, EET_T_UINT);
76 MY_CONF_ADD_BASIC(name, EET_T_STRING);
77 MY_CONF_ADD_BASIC(id, EET_T_INT);
78 MY_CONF_ADD_BASIC(enabled, EET_T_UCHAR);
80 // And add the sub descriptor as a linked list at 'subs' in the main struct
81 EET_DATA_DESCRIPTOR_ADD_LIST
82 (_my_conf_descriptor, My_Conf_Type, "subs", subs, _my_conf_sub_descriptor);
84 #undef MY_CONF_ADD_BASIC
85 #undef MY_CONF_SUB_ADD_BASIC
89 _my_conf_descriptor_shutdown(void)
91 eet_data_descriptor_free(_my_conf_sub_descriptor);
92 eet_data_descriptor_free(_my_conf_descriptor);
98 My_Conf_Type *my_conf = calloc(1, sizeof(My_Conf_Type));
102 fprintf(stderr, "ERROR: could not calloc My_Conf_Type\n");
106 my_conf->version = 0x112233;
107 my_conf->enabled = EINA_TRUE;
109 sub = calloc(1, sizeof(My_Conf_Subtype));
112 sub->server = eina_stringshare_add("my-server.com");
114 my_conf->subs = eina_list_append(my_conf->subs, sub);
121 _my_conf_free(My_Conf_Type *my_conf)
123 My_Conf_Subtype *sub;
124 EINA_LIST_FREE(my_conf->subs, sub)
126 eina_stringshare_del(sub->server);
130 eina_stringshare_del(my_conf->name);
134 static My_Conf_Type *
135 _my_conf_load(const char *filename)
137 My_Conf_Type *my_conf;
138 Eet_File *ef = eet_open(filename, EET_FILE_MODE_READ);
141 fprintf(stderr, "ERROR: could not open '%s' for read\n", filename);
145 my_conf = eet_data_read(ef, _my_conf_descriptor, MY_CONF_FILE_ENTRY);
149 if (my_conf->version < 0x112233)
152 "WARNING: version %#x was too old, upgrading it to %#x\n",
153 my_conf->version, 0x112233);
155 my_conf->version = 0x112233;
156 my_conf->enabled = EINA_TRUE;
165 _my_conf_save(const My_Conf_Type *my_conf, const char *filename)
173 len = eina_strlcpy(tmp, filename, sizeof(tmp));
174 if (len + 12 >= (int)sizeof(tmp))
176 fprintf(stderr, "ERROR: file name is too big: %s\n", filename);
183 snprintf(tmp + len, 12, ".%u", i);
186 while (stat(tmp, &st) == 0);
188 ef = eet_open(tmp, EET_FILE_MODE_WRITE);
191 fprintf(stderr, "ERROR: could not open '%s' for write\n", tmp);
196 (ef, _my_conf_descriptor, MY_CONF_FILE_ENTRY, my_conf, EINA_TRUE);
202 rename(tmp, filename);
208 int main(int argc, char *argv[])
210 My_Conf_Type *my_conf;
211 const My_Conf_Subtype *sub;
217 fprintf(stderr, "Usage:\n\t%s <input> <output>\n\n", argv[0]);
223 _my_conf_descriptor_init();
225 my_conf = _my_conf_load(argv[1]);
228 printf("creating new configuration.\n");
229 my_conf = _my_conf_new();
237 printf("My_Conf_Type:\n"
244 my_conf->name ? my_conf->name : "",
248 EINA_LIST_FOREACH(my_conf->subs, l, sub)
249 printf("\t\tserver: '%s', port: %d\n",
250 sub->server ? sub->server : "",
253 if (!_my_conf_save(my_conf, argv[2]))
256 _my_conf_free(my_conf);
259 _my_conf_descriptor_shutdown();