c89 type safe dynamic array

array.h

#ifndef ARRAY_H
#define ARRAY_H

#include <stddef.h>
#include <stdlib.h>
#include <string.h>

#define Array(T)\
    struct {\
        T *data;\
        size_t count;\
        size_t capacity;\
    }

#define array_init(ARRAY) do {\
    memset((ARRAY), 0, sizeof(*(ARRAY)));\
    (ARRAY)->data = malloc(sizeof(*(ARRAY)));\
    (ARRAY)->capacity = 1;\
} while (0)\

#define array_push_back(ARRAY, VALUE) do {\
    void *data = (ARRAY)->data;\
    size_t new_count = (ARRAY)->count + 1;\
    size_t new_capacity = (ARRAY)->capacity;\
\
    if (new_count > (ARRAY)->capacity) {\
        new_capacity *= 2;\
        data = realloc(data, new_capacity * sizeof(*((ARRAY)->data)));\
\
        if (data) {\
            (ARRAY)->data = data; \
        }\
    }\
\
    (ARRAY)->data[(ARRAY)->count++] = VALUE;\
    (ARRAY)->capacity = new_capacity;\
} while (0)

#define array_push_front(ARRAY, VALUE) do {\
    void *old_buf, *new_buf;\
    size_t new_count = (ARRAY)->count + 1;\
    size_t new_capacity = (ARRAY)->capacity;\
\
    old_buf = (ARRAY)->data; \
\
    if (new_count > (ARRAY)->capacity) {\
        new_capacity *= 2;\
        new_buf = malloc(new_capacity * sizeof(*((ARRAY)->data)));\
        memcpy((char *)new_buf + sizeof(*((ARRAY)->data)), (ARRAY)->data, sizeof(*((ARRAY)->data)) * new_count);\
\
        if (new_buf) {\
            (ARRAY)->data = new_buf; \
            free(old_buf);\
        }\
    }\
\
    (ARRAY)->data[0] = VALUE;\
    (ARRAY)->count = new_count;\
    (ARRAY)->capacity = new_capacity;\
} while (0)

#define array_pop_back(ARRAY)\
    (ARRAY)->data[--(ARRAY)->count]\

#define array_pop_front(ARRAY)\
    (ARRAY)->data[(ARRAY)->count - (ARRAY)->count--];

#define array_deinit(ARRAY) do {\
    free((ARRAY)->data);\
} while (0)

#endif /* ARRAY_H */