#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>

typedef enum
{
    SML_ETYPE_NONE                = (0x000000),
    SML_ETYPE_WINDOW              = (0x000001),
    SML_ETYPE_WIDGET_FOCUSABLE    = (0x000002),
    SML_ETYPE_WIDGET_NONFOCUSABLE = (0x000003),
    SML_ETYPE_TIME                = (0x000004),
    SML_ETYPE_GRAPHICS            = (0x000005),
    SML_ETYPE_TEXTOBJ             = (0x000006),
    SML_ETYPE_GRAPHRULES          = (0x000007),
    SML_ETYPE_SHARED              = (0x000008)
} SmlElemType;

#define SML_GENERICDATASIZE  (1024) /* bytes */

typedef uint32_t SmlErrors; // simplified.
typedef uint32_t SmlIndex;

typedef struct
{
    char            data[SML_GENERICDATASIZE];
} SmlGenericData;

#define SML_THEMEBLOCK_SIZE (0x20)

typedef struct
{
    SmlIndex     sprite[SML_THEMEBLOCK_SIZE];
    SmlIndex     theme [SML_THEMEBLOCK_SIZE];
} SmlWidgetData;

typedef union
{
    SmlGenericData  gen;
    SmlWidgetData   wdg;
} SmlElemData;

typedef struct
{
    SmlElemType    type;
    SmlElemData    data;
} SmlElement;

typedef struct
{
    SmlElement   * elem;
    uint32_t       elemcount;
} Warehouse;

Warehouse warehouse;

SmlErrors SmlWhsAdd(SmlElement element, SmlIndex * index)
{
    //SML_CHECKPTR(index); Just checks if null.

    SmlElement * ptrold = warehouse.elem;

    warehouse.elem      = realloc(warehouse.elem,
                                  (++warehouse.elemcount) * sizeof(SmlElement));
    if (!(warehouse.elem))
    {
        warehouse.elem = ptrold;
        *index         = 0;
        warehouse.elemcount--;
        return 1;//SML_ERR_BADALLOC;
    }

    warehouse.elem[warehouse.elemcount - 1] = element;

    *index = (warehouse.elemcount - 1);

    return 0;//SML_ERR_SUCCESS;
}



int main(void)
{
    // Inits in another module
    warehouse.elemcount = 0;
    warehouse.elem = NULL;

    SmlElement dummy;
    dummy.type = SML_ETYPE_WINDOW;

    SmlIndex window;
    SmlWhsAdd(dummy, &window);
    SmlElement sprite;
    sprite.type = SML_ETYPE_GRAPHICS;

    SmlWhsAdd(sprite, &(warehouse.elem[window].data.wdg.sprite[0]));

    return 0;
}