array.h

array.h

#ifndef __ARRAY_HEADER
#define __ARRAY_HEADER
// New Array: int *i = ARRAY(int, i);
#define ARRAY(t, n) calloc(0, sizeof(t)); size_t arr_##n##_count=0

// Add item: ARPUSH(i, 12);
#define ARRPUSH(a, n) a=realloc(a, sizeof(a[0])*(arr_##a##_count+1));\
                         a[arr_##a##_count]=n;\
                         arr_##a##_count+=1;
                         
// Pop item: int i = ARRPOP(i);
#define ARRPOP(a) a[arr_##a##_count-1];\
                  a=realloc(a, sizeof(a[0])*(arr_##a##_count));\
                  arr_##a##_count-=1;

// Get number of elements: size_t count = ARRCOUNT(i);
#define ARRCOUNT(a) arr_##a##_count

// Get size of array(all elements) size_t sz = ARRSIZE(i);
#define ARRSIZE(a) arr_##a##_count*sizeof(a[0])

// Loop over each index: ARREACH(varname, arr){ printf("%d\n", arr[varname]); }
#define ARREACH(i, a) for(size_t i = 0; i < arr_##a##_count; i++)
#endif

// public domain (2014)