Tizen Native API
6.0
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eina_magic_01.c
//Compile with: //gcc -g eina_magic_01.c -o eina_magic_01 `pkg-config --cflags --libs eina` #include <Eina.h> #define BASETYPE_MAGIC 0x12345 struct _person { EINA_MAGIC; char *name; }; typedef struct _person person; #define SUBTYPE_MAGIC 0x3333 struct _pilot { person base; EINA_MAGIC; char *callsign; }; typedef struct _pilot pilot; person * person_new(const char *name) { person *ptr = malloc(sizeof(person)); EINA_MAGIC_SET(ptr, BASETYPE_MAGIC); ptr->name = strdup(name); return ptr; } void person_free(person *ptr) { if (!EINA_MAGIC_CHECK(ptr, BASETYPE_MAGIC)) { EINA_MAGIC_FAIL(ptr, BASETYPE_MAGIC); return; } EINA_MAGIC_SET(ptr, EINA_MAGIC_NONE); free(ptr->name); free(ptr); } pilot * pilot_new(const char *name, const char *callsign) { pilot *ptr = malloc(sizeof(pilot)); EINA_MAGIC_SET(ptr, SUBTYPE_MAGIC); EINA_MAGIC_SET(&ptr->base, BASETYPE_MAGIC); ptr->base.name = strdup(name); ptr->callsign = strdup(callsign); return ptr; } void pilot_free(pilot *ptr) { if (!EINA_MAGIC_CHECK(ptr, SUBTYPE_MAGIC)) { EINA_MAGIC_FAIL(ptr, SUBTYPE_MAGIC); return; } EINA_MAGIC_SET(ptr, EINA_MAGIC_NONE); EINA_MAGIC_SET(&ptr->base, EINA_MAGIC_NONE); free(ptr->base.name); free(ptr->callsign); free(ptr); } void print_person(person *ptr) { if (!EINA_MAGIC_CHECK(ptr, BASETYPE_MAGIC)){ EINA_MAGIC_FAIL(ptr, BASETYPE_MAGIC); return; } printf("name: %s\n", ptr->name); } void print_pilot(pilot *ptr) { if (!EINA_MAGIC_CHECK(ptr, SUBTYPE_MAGIC)) { EINA_MAGIC_FAIL(ptr, SUBTYPE_MAGIC); return; } print_person(&ptr->base); printf("callsign: %s\n", ptr->callsign); } int main(int argc EINA_UNUSED, char **argv EINA_UNUSED) { person *base; pilot *sub; eina_init(); eina_magic_string_set(BASETYPE_MAGIC, "person"); eina_magic_string_static_set(SUBTYPE_MAGIC, "pilot"); base = person_new("Tyrol"); sub = pilot_new("thrace", "starbuck"); print_person(base); print_person((person *)sub); print_pilot((pilot *)base); //BAD: fails (C cast prevents GCC warning) print_pilot(sub); eina_shutdown(); }