pawengine/dynarray.h

#ifndef INCLUDE_WAYLANDCLIENT_DYNARRAY_H_
#define INCLUDE_WAYLANDCLIENT_DYNARRAY_H_

#include "allocator.h"

#include <stdint.h>

#define dyn_array_append(array, item)                                          \
  do {                                                                         \
    if ((array)->count >= (array)->capacity) {                                 \
      (array)->capacity += 10;                                                 \
      if ((array)->mem == NULL) {                                              \
        (array)->items = realloc((array)->items,                               \
                                 (array)->capacity * sizeof(*(array)->items)); \
      } else {                                                                 \
        void *temp = (array)->items;                                           \
        (array)->items = mem_malloc(                                           \
            (array)->mem, (array)->capacity * sizeof(*(array)->items));        \
        memcpy((array)->items, temp,                                           \
               ((array)->count) * sizeof(*(array)->items));                    \
        mem_free((array)->mem, temp);                                          \
      }                                                                        \
    }                                                                          \
    (array)->items[(array)->count++] = (item);                                 \
  } while (0)

#define dyn_array_remove(array, index)                                         \
  do {                                                                         \
    (array)->items[(index)] = (array)->items[(array)->count - 1];              \
    memset(&(array)->items[(array)->count], 0, sizeof((array)->items[0]));     \
    (array)->count--;                                                          \
  } while (0)

#define dyn_array_destroy(array)                                               \
  if ((array)->mem == NULL) {                                                  \
    free((array)->items);                                                      \
  } else {                                                                     \
    mem_free((array)->mem, (array)->items);                                    \
  }

#define dyn_array_reset(array)                                                 \
  do {                                                                         \
    (array)->capacity = 10;                                                    \
    (array)->count = 0;                                                        \
    if ((array)->mem == NULL) {                                                \
      (array)->items = realloc((array)->items,                                 \
                               (array)->capacity * sizeof(*(array)->items));   \
    } else {                                                                   \
      mem_free((array)->mem, (array)->items);                                  \
      (array)->items = mem_malloc((array)->mem, (array)->capacity *            \
                                                    sizeof(*(array)->items));  \
    }                                                                          \
  } while (0)

#define dyn_array_define($name, $type)                                         \
  struct $name {                                                               \
    int count;                                                                 \
    int capacity;                                                              \
    $type *items;                                                              \
    struct Mem *mem;                                                           \
  }

dyn_array_define(da_uint32_t, uint32_t);

void *dyn_array_create();
void *dyn_array_create_mem(struct Mem *mem);
void dyn_array_create_inplace(void *array);
void dyn_array_create_inplace_mem(void *array, struct Mem *mem);

#endif // INCLUDE_WAYLANDCLIENT_DYNARRAY_H_