apfl/src/internal.h

#ifndef APFL_INTERNAL_H
#define APFL_INTERNAL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>

#include "common.h"

#define DEINIT_LIST(items, len, item_deinit) \
    do {                                     \
        if ((items) == NULL) {               \
            break;                           \
        }                                    \
        for (size_t i = 0; i < (len); i++) { \
            item_deinit(&((items)[i]));      \
        }                                    \
        len = 0;                             \
        free(items);                         \
        (items) = NULL;                      \
    } while(0)

#define MOVEPTR(out, in) \
    do {                 \
        out = in;        \
        in = NULL;       \
    } while(0)

// ALLOC_LIST allocates memory for a list of n values of type T.
// n == 0 will always result in NULL (not guaranteed by calloc()) and the
// result will be cast into a pointer to T (this way the compiler can warn us,
// if we try to allocate memory for a wrong type). Also if we always use
// calloc(), the allocated memory is in a defined state.
#define ALLOC_LIST(T, n) (T *)((n) == 0 ? NULL : calloc((n), sizeof(T)))

#define ALLOC(T) ALLOC_LIST(T, 1)

// Aliases to commonly used functions / macros

#define DESTROY APFL_DESTROY

#ifdef __cplusplus
}
#endif

#endif