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eet-data-file_descriptor_02.c
//Compile with:
// gcc -o eet-data-file_descriptor_02 eet-data-file_descriptor_02.c `pkg-config --cflags --libs eet eina`
#include <Eina.h>
#include <Eet.h>
#include <stdio.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
typedef enum _Example_Data_Type Example_Data_Type;
typedef struct _Example_Variant_Type Example_Variant_Type;
typedef struct _Example_Variant Example_Variant;
typedef struct _Example_Union Example_Union;
typedef struct _Example_Struct1 Example_Struct1;
typedef struct _Example_Struct2 Example_Struct2;
typedef struct _Example_Struct3 Example_Struct3;
typedef struct _Example_Lists Example_Lists;
enum _Example_Data_Type
{
EET_UNKNOWN = 0,
EET_STRUCT1,
EET_STRUCT2,
EET_STRUCT3,
EET_BASIC_FLOAT,
EET_BASIC_STRING
};
struct
{
Example_Data_Type u;
const char *name;
} eet_mapping[] = {
{ EET_STRUCT1, "ST1" },
{ EET_STRUCT2, "ST2" },
{ EET_STRUCT3, "ST3" },
{ EET_BASIC_FLOAT, "float" },
{ EET_BASIC_STRING, "string" },
{ EET_UNKNOWN, NULL }
};
struct _Example_Struct1
{
double val1;
int stuff;
const char *s1;
};
struct _Example_Struct2
{
Eina_Bool b1;
unsigned long long v1;
};
struct _Example_Struct3
{
int body;
};
struct _Example_Union
{
Example_Data_Type type;
union {
Example_Struct1 st1;
Example_Struct2 st2;
Example_Struct3 st3;
float f;
const char* string;
} u;
};
struct _Example_Variant_Type
{
const char *type;
Eina_Bool unknow : 1;
};
struct _Example_Variant
{
Example_Variant_Type t;
void *data; /* differently than the union type, we
* don't need to pre-allocate the memory
* for the field*/
};
struct _Example_Lists
{
Eina_List *union_list;
Eina_List *variant_list;
};
static void
_st1_set(Example_Struct1 *st1,
double v1,
int v2,
const char *v3)
{
st1->val1 = v1;
st1->stuff = v2;
st1->s1 = v3;
} /* _st1_set */
static void
_st2_set(Example_Struct2 *st2,
Eina_Bool v1,
unsigned long long v2)
{
st2->b1 = v1;
st2->v1 = v2;
} /* _st2_set */
static void
_st3_set(Example_Struct3 *st3,
int v1)
{
st3->body = v1;
} /* _st3_set */
static const char *
/* union
type_get() */
_union_type_get(const void *data,
Eina_Bool *unknow)
{
const Example_Data_Type *u = data;
int i;
if (unknow)
*unknow = EINA_FALSE;
for (i = 0; eet_mapping[i].name != NULL; ++i)
if (*u == eet_mapping[i].u)
return eet_mapping[i].name;
if (unknow)
*unknow = EINA_TRUE;
return NULL;
} /* _union_type_get */
static Eina_Bool
_union_type_set(const char *type,
void *data,
Eina_Bool unknow)
{
Example_Data_Type *u = data;
int i;
if (unknow)
return EINA_FALSE;
for (i = 0; eet_mapping[i].name != NULL; ++i)
if (strcmp(eet_mapping[i].name, type) == 0)
{
*u = eet_mapping[i].u;
return EINA_TRUE;
}
return EINA_FALSE;
} /* _union_type_set */
static const char *
_variant_type_get(const void *data,
Eina_Bool *unknow)
{
const Example_Variant_Type *type = data;
int i;
if (unknow)
*unknow = type->unknow;
for (i = 0; eet_mapping[i].name != NULL; ++i)
if (strcmp(type->type, eet_mapping[i].name) == 0)
return eet_mapping[i].name;
if (unknow)
*unknow = EINA_FALSE;
return type->type;
} /* _variant_type_get */
static Eina_Bool
_variant_type_set(const char *type,
void *data,
Eina_Bool unknow)
{
Example_Variant_Type *vt = data;
vt->type = type;
vt->unknow = unknow;
return EINA_TRUE;
} /* _variant_type_set */
static Eet_Data_Descriptor *
_st1_dd(void)
{
Eet_Data_Descriptor_Class eddc;
Eet_Data_Descriptor *res;
EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(&eddc, Example_Struct1);
res = eet_data_descriptor_file_new(&eddc);
EET_DATA_DESCRIPTOR_ADD_BASIC(
res, Example_Struct1, "val1", val1, EET_T_DOUBLE);
EET_DATA_DESCRIPTOR_ADD_BASIC(
res, Example_Struct1, "stuff", stuff, EET_T_INT);
EET_DATA_DESCRIPTOR_ADD_BASIC(
res, Example_Struct1, "s1", s1, EET_T_STRING);
return res;
} /* _st1_dd */
static Eet_Data_Descriptor *
_st2_dd(void)
{
Eet_Data_Descriptor_Class eddc;
Eet_Data_Descriptor *res;
EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(&eddc, Example_Struct2);
res = eet_data_descriptor_file_new(&eddc);
EET_DATA_DESCRIPTOR_ADD_BASIC(
res, Example_Struct2, "b1", b1, EET_T_UCHAR);
EET_DATA_DESCRIPTOR_ADD_BASIC(
res, Example_Struct2, "v1", v1, EET_T_ULONG_LONG);
return res;
} /* _st2_dd */
static Eet_Data_Descriptor *
_st3_dd(void)
{
Eet_Data_Descriptor_Class eddc;
Eet_Data_Descriptor *res;
EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(&eddc, Example_Struct3);
res = eet_data_descriptor_file_new(&eddc);
EET_DATA_DESCRIPTOR_ADD_BASIC(
res, Example_Struct3, "body", body, EET_T_INT);
return res;
} /* _st3_dd */
/* string that represents the entry in the eet file. you might like to
* have different profiles or so in the same file, this is possible
* with different strings
*/
static const char CACHE_FILE_ENTRY[] = "cache";
/* keep the descriptor static global, so it can be shared by different
* functions (load/save) of this and only this file.
*/
static Eet_Data_Descriptor *_lists_descriptor;
static Eet_Data_Descriptor *_struct_1_descriptor;
static Eet_Data_Descriptor *_struct_2_descriptor;
static Eet_Data_Descriptor *_struct_3_descriptor;
static Eet_Data_Descriptor *_union_descriptor;
static Eet_Data_Descriptor *_variant_descriptor;
static Eet_Data_Descriptor *_union_unified_descriptor;
static Eet_Data_Descriptor *_variant_unified_descriptor;
/* keep file handle alive, so mmap()ed strings are all alive as
* well */
static Eet_File *_cache_file = NULL;
static Eet_Dictionary *_cache_dict = NULL;
static void
/* declaring types */
_data_descriptors_init(void)
{
Eet_Data_Descriptor_Class eddc;
EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(&eddc, Example_Lists);
_lists_descriptor = eet_data_descriptor_file_new(&eddc);
_struct_1_descriptor = _st1_dd();
_struct_2_descriptor = _st2_dd();
_struct_3_descriptor = _st3_dd();
/* for union */
EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(&eddc, Example_Union);
_union_descriptor = eet_data_descriptor_file_new(&eddc);
eddc.version = EET_DATA_DESCRIPTOR_CLASS_VERSION;
eddc.func.type_get = _union_type_get;
eddc.func.type_set = _union_type_set;
_union_unified_descriptor = eet_data_descriptor_file_new(&eddc);
EET_DATA_DESCRIPTOR_ADD_MAPPING(
_union_unified_descriptor, "ST1", _struct_1_descriptor);
EET_DATA_DESCRIPTOR_ADD_MAPPING(
_union_unified_descriptor, "ST2", _struct_2_descriptor);
EET_DATA_DESCRIPTOR_ADD_MAPPING(
_union_unified_descriptor, "ST3", _struct_3_descriptor);
EET_DATA_DESCRIPTOR_ADD_MAPPING_BASIC(
_union_unified_descriptor, "float", EET_T_FLOAT);
EET_DATA_DESCRIPTOR_ADD_MAPPING_BASIC(
_union_unified_descriptor, "string", EET_T_STRING);
EET_DATA_DESCRIPTOR_ADD_UNION(
_union_descriptor, Example_Union, "u", u, type,
_union_unified_descriptor);
EET_DATA_DESCRIPTOR_ADD_LIST(
_lists_descriptor, Example_Lists, "union_list", union_list,
_union_descriptor);
/* for variant */
EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(&eddc, Example_Variant);
_variant_descriptor = eet_data_descriptor_file_new(&eddc);
eddc.version = EET_DATA_DESCRIPTOR_CLASS_VERSION;
eddc.func.type_get = _variant_type_get;
eddc.func.type_set = _variant_type_set;
_variant_unified_descriptor = eet_data_descriptor_stream_new(&eddc);
EET_DATA_DESCRIPTOR_ADD_MAPPING(
_variant_unified_descriptor, "ST1", _struct_1_descriptor);
EET_DATA_DESCRIPTOR_ADD_MAPPING(
_variant_unified_descriptor, "ST2", _struct_2_descriptor);
EET_DATA_DESCRIPTOR_ADD_MAPPING(
_variant_unified_descriptor, "ST3", _struct_3_descriptor);
EET_DATA_DESCRIPTOR_ADD_VARIANT(
_variant_descriptor, Example_Variant, "data", data, t,
_variant_unified_descriptor);
EET_DATA_DESCRIPTOR_ADD_LIST(
_lists_descriptor, Example_Lists, "variant_list", variant_list,
_variant_descriptor);
} /* _data_descriptors_init */
static void
_data_descriptors_shutdown(void)
{
eet_data_descriptor_free(_lists_descriptor);
eet_data_descriptor_free(_struct_1_descriptor);
eet_data_descriptor_free(_struct_2_descriptor);
eet_data_descriptor_free(_struct_3_descriptor);
eet_data_descriptor_free(_union_descriptor);
eet_data_descriptor_free(_variant_descriptor);
eet_data_descriptor_free(_union_unified_descriptor);
eet_data_descriptor_free(_variant_unified_descriptor);
} /* _data_descriptors_shutdown */
/* need to check if the pointer came from mmap()ed area in
* eet_dictionary or it was allocated with eina_stringshare_add()
*/
static void
_string_free(const char *str)
{
if (!str)
return;
if ((_cache_dict) && (eet_dictionary_string_check(_cache_dict, str)))
return;
eina_stringshare_del(str);
} /* _string_free */
static Example_Union *
_union_1_new(const char *v1,
const char *v2,
const char *v3)
{
Example_Union *un = calloc(1, sizeof(Example_Union));
if (!un)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Union struct.\n");
return NULL;
}
un->type = EET_STRUCT1;
_st1_set(&(un->u.st1), atof(v1), atoi(v2), eina_stringshare_add(v3));
return un;
}
static Example_Union *
_union_2_new(const char *v1,
const char *v2)
{
Example_Union *un = calloc(1, sizeof(Example_Union));
if (!un)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Union struct.\n");
return NULL;
}
un->type = EET_STRUCT2;
_st2_set(&(un->u.st2), atoi(v1), atoi(v2));
return un;
}
static Example_Union *
_union_3_new(const char *v1)
{
Example_Union *un = calloc(1, sizeof(Example_Union));
if (!un)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Union struct.\n");
return NULL;
}
un->type = EET_STRUCT3;
_st3_set(&(un->u.st3), atoi(v1));
return un;
}
static Example_Union *
_union_float_new(const char *v1)
{
Example_Union *un = calloc(1, sizeof(Example_Union));
if (!un)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Union struct.\n");
return NULL;
}
un->type = EET_BASIC_FLOAT;
un->u.f = atof(v1);
return un;
}
static Example_Union *
_union_string_new(const char *v1)
{
Example_Union *un = calloc(1, sizeof(Example_Union));
if (!un)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Union struct.\n");
return NULL;
}
un->type = EET_BASIC_STRING;
un->u.string = v1;
return un;
}
static Example_Variant *
_variant_1_new(const char *v1,
const char *v2,
const char *v3)
{
Example_Struct1 *st1;
Example_Variant *va = calloc(1, sizeof(Example_Variant));
if (!va)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Variant struct.\n");
return NULL;
}
va = calloc(1, sizeof (Example_Variant));
va->t.type = eet_mapping[0].name;
st1 = calloc(1, sizeof (Example_Struct1));
_st1_set(st1, atof(v1), atoi(v2), eina_stringshare_add(v3));
va->data = st1;
return va;
}
static Example_Variant *
_variant_2_new(const char *v1,
const char *v2)
{
printf("varinant 2 new\n");
Example_Struct2 *st2;
Example_Variant *va = calloc(1, sizeof(Example_Variant));
if (!va)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Variant struct.\n");
return NULL;
}
va = calloc(1, sizeof (Example_Variant));
va->t.type = eet_mapping[1].name;
printf("type gets %s\n", va->t.type);
st2 = calloc(1, sizeof (Example_Struct2));
_st2_set(st2, atoi(v1), atoi(v2));
va->data = st2;
return va;
}
static Example_Variant *
_variant_3_new(const char *v1)
{
Example_Struct3 *st3;
Example_Variant *va = calloc(1, sizeof(Example_Variant));
if (!va)
{
fprintf(
stderr, "ERROR: could not allocate an Example_Variant struct.\n");
return NULL;
}
va = calloc(1, sizeof (Example_Variant));
va->t.type = eet_mapping[2].name;
st3 = calloc(1, sizeof (Example_Struct3));
_st3_set(st3, atoi(v1));
va->data = st3;
return va;
}
static Example_Lists *
_data_new(void)
{
Example_Lists *example_lists = calloc(1, sizeof(Example_Lists));
if (!example_lists)
{
fprintf(stderr, "ERROR: could not allocate a Example_Lists struct.\n");
return NULL;
}
return example_lists;
} /* _data_new */
static void
_union_free(Example_Union *un)
{
if (un->type == EET_STRUCT1)
{
Example_Struct1 *st1 = &(un->u.st1);
_string_free(st1->s1);
}
free(un);
}
static void
_variant_free(Example_Variant *va)
{
if (!strcmp(va->t.type, eet_mapping[0].name))
{
Example_Struct1 *st1 = va->data;
_string_free(st1->s1);
}
free(va->data);
free(va);
}
static void
_data_free(Example_Lists *cache)
{
Example_Union *un;
Example_Variant *va;
EINA_LIST_FREE(cache->union_list, un)
_union_free(un);
EINA_LIST_FREE(cache->variant_list, va)
_variant_free(va);
free(cache);
} /* _data_free */
static Example_Lists *
_data_load(const char *filename)
{
Example_Lists *data;
Eet_File *ef = eet_open(filename, EET_FILE_MODE_READ);
if (!ef)
{
fprintf(stderr, "ERROR: could not open '%s' for read\n", filename);
return NULL;
}
data = eet_data_read(ef, _lists_descriptor, CACHE_FILE_ENTRY);
if (!data)
{
eet_close(ef);
return NULL;
}
if (_cache_file)
eet_close(_cache_file);
_cache_file = ef;
_cache_dict = eet_dictionary_get(ef);
return data;
} /* _data_load */
static Eina_Bool
_data_save(const Example_Lists *cache,
const char *filename)
{
char tmp[PATH_MAX];
Eet_File *ef;
Eina_Bool ret;
unsigned int i, len;
struct stat st;
len = eina_strlcpy(tmp, filename, sizeof(tmp));
if (len + 12 >= (int)sizeof(tmp))
{
fprintf(stderr, "ERROR: file name is too big: %s\n", filename);
return EINA_FALSE;
}
i = 0;
do
{
snprintf(tmp + len, 12, ".%u", i);
i++;
}
while (stat(tmp, &st) == 0);
ef = eet_open(tmp, EET_FILE_MODE_WRITE);
if (!ef)
{
fprintf(stderr, "ERROR: could not open '%s' for write\n", tmp);
return EINA_FALSE;
}
ret = eet_data_write
(ef, _lists_descriptor, CACHE_FILE_ENTRY, cache, EINA_TRUE);
eet_close(ef);
if (ret)
{
unlink(filename);
rename(tmp, filename);
}
return ret;
} /* _data_save */
static void
_print_union(const Example_Union *un)
{
printf("\t | type: %s'\n", eet_mapping[un->type - 1].name);
switch (un->type)
{
case EET_STRUCT1:
printf("\t\t val1: %f\n", un->u.st1.val1);
printf("\t\t stuff: %d\n", un->u.st1.stuff);
printf("\t\t s1: %s\n", un->u.st1.s1);
break;
case EET_STRUCT2:
printf("\t\t val1: %i\n", un->u.st2.b1);
printf("\t\t stuff: %lli\n", un->u.st2.v1);
break;
case EET_STRUCT3:
printf("\t\t val1: %i\n", un->u.st3.body);
break;
case EET_BASIC_FLOAT:
printf("\t\t float: %f\n", un->u.f);
break;
case EET_BASIC_STRING:
printf("\t\t string: %s\n", un->u.string);
break;
default:
return;
}
}
static void
_print_variant(const Example_Variant *va)
{
printf("\t | type: %s'\n", va->t.type);
switch (va->t.type[2])
{
case '1':
{
Example_Struct1 *st1 = va->data;
printf("\t\t val1: %f\n", st1->val1);
printf("\t\t stuff: %d\n", st1->stuff);
printf("\t\t s1: %s\n", st1->s1);
}
break;
case '2':
{
Example_Struct2 *st2 = va->data;
printf("\t\t val1: %i\n", st2->b1);
printf("\t\t stuff: %lli\n", st2->v1);
}
break;
case '3':
{
Example_Struct3 *st3 = va->data;
printf("\t\t val1: %i\n", st3->body);
}
break;
default:
return;
}
}
int
main(int argc,
char *argv[])
{
Example_Lists *data_lists;
int ret = 0;
if (argc < 3)
{
fprintf(stderr,
"Usage:\n\t%s <input> <output> [action action-params]\n\n"
"where actions and their parameters are:\n"
"\tunion <type> [fields]\n"
"\tvariant <type> [fields]\n"
"\n",
argv[0]);
return -1;
}
eina_init();
eet_init();
_data_descriptors_init();
data_lists = _data_load(argv[1]);
if (!data_lists)
{
printf("Creating new data lists.\n");
data_lists = _data_new();
if (!data_lists)
{
ret = -2;
goto end;
}
}
if (argc > 3)
{
if (strcmp(argv[3], "union") == 0)
{
if (argc > 4)
{
int type = atoi(argv[4]);
Example_Union *un;
if (type < EET_STRUCT1 || type > EET_BASIC_STRING)
{
fprintf(stderr,
"ERROR: invalid type parameter (%s).\n",
argv[4]);
goto cont;
}
switch (type)
{
case 1:
if (argc != 8)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
un = _union_1_new(
argv[5], argv[6], argv[7]);
if (!un)
{
fprintf(
stderr, "ERROR: could not create the "
"requested union.\n");
goto cont;
}
data_lists->union_list =
eina_list_append(data_lists->union_list, un);
break;
case 2:
if (argc != 7)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
un = _union_2_new(argv[5], argv[6]);
if (!un)
{
fprintf(
stderr, "ERROR: could not create the "
"requested union.\n");
goto cont;
}
data_lists->union_list =
eina_list_append(data_lists->union_list, un);
break;
case 3:
if (argc != 6)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
un = _union_3_new(argv[5]);
if (!un)
{
fprintf(
stderr, "ERROR: could not create the "
"requested union.\n");
goto cont;
}
data_lists->union_list =
eina_list_append(data_lists->union_list, un);
break;
case EET_BASIC_FLOAT:
if (argc != 6)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
un = _union_float_new(argv[5]);
if (!un)
{
fprintf(
stderr, "ERROR: could not create the "
"requested union.\n");
goto cont;
}
data_lists->union_list =
eina_list_append(data_lists->union_list, un);
break;
case EET_BASIC_STRING:
if (argc != 6)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
un = _union_string_new(argv[5]);
if (!un)
{
fprintf(
stderr, "ERROR: could not create the "
"requested union.\n");
goto cont;
}
data_lists->union_list =
eina_list_append(data_lists->union_list, un);
break;
default:
fprintf(
stderr, "ERROR: bad type of of struct passed\n");
goto cont;
}
}
else
fprintf(stderr,
"ERROR: wrong number of parameters (%d).\n",
argc);
}
else if (strcmp(argv[3], "variant") == 0)
{
if (argc > 4)
{
int type = atoi(argv[4]);
Example_Variant *va;
if (type < EET_STRUCT1 || type > EET_STRUCT3)
{
fprintf(stderr,
"ERROR: invalid type parameter (%s).\n",
argv[4]);
goto cont;
}
switch (type)
{
case 1:
if (argc != 8)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
va = _variant_1_new(
argv[5], argv[6], argv[7]);
if (!va)
{
fprintf(
stderr, "ERROR: could not create the "
"requested variant.\n");
goto cont;
}
data_lists->variant_list =
eina_list_append(data_lists->variant_list, va);
break;
case 2:
if (argc != 7)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
va = _variant_2_new(argv[5], argv[6]);
if (!va)
{
fprintf(
stderr, "ERROR: could not create the "
"requested variant.\n");
goto cont;
}
data_lists->variant_list =
eina_list_append(data_lists->variant_list, va);
break;
case 3:
if (argc != 6)
{
fprintf(
stderr, "ERROR: wrong number of parameters"
" (%d).\n", argc);
goto cont;
}
va = _variant_3_new(argv[5]);
if (!va)
{
fprintf(
stderr, "ERROR: could not create the "
"requested variant.\n");
goto cont;
}
data_lists->variant_list =
eina_list_append(data_lists->variant_list, va);
break;
default:
fprintf(
stderr, "ERROR: bad type of of struct passed\n");
goto cont;
}
}
else
fprintf(stderr,
"ERROR: wrong number of parameters (%d).\n",
argc);
}
else
fprintf(stderr, "ERROR: unknown action '%s'\n", argv[3]);
}
cont:
printf("Cached data:\n");
printf("\tstats: unions=%u, variants=%u\n",
eina_list_count(data_lists->union_list),
eina_list_count(data_lists->variant_list));
if (eina_list_count(data_lists->union_list))
{
const Eina_List *l;
const Example_Union *un;
printf("\t * union list:\n");
EINA_LIST_FOREACH(data_lists->union_list, l, un)
{
_print_union(un);
}
}
if (eina_list_count(data_lists->variant_list))
{
const Eina_List *l;
const Example_Variant *un;
printf("\t * variant list:\n");
EINA_LIST_FOREACH(data_lists->variant_list, l, un)
{
_print_variant(un);
}
}
printf("\n");
if (!_data_save(data_lists, argv[2]))
ret = -3;
_data_free(data_lists);
end:
if (_cache_file)
eet_close(_cache_file);
_data_descriptors_shutdown();
eet_shutdown();
eina_shutdown();
return ret;
} /* main */