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/**
* \file array.c
* \brief Dynamic array object.
* \author Copyright (c) 2007-2008 Jason Perkins and the Premake project
*/
#include <stdlib.h>
#include "premake.h"
#include "base/array.h"
#define INITIAL_SIZE 16
DEFINE_CLASS(Array)
{
void** contents;
int size;
int capacity;
};
/**
* Create a new, empty array object.
* \returns A new array object.
*/
Array array_create()
{
Array arr = ALLOC_CLASS(Array);
arr->contents = (void**)malloc(sizeof(void*) * INITIAL_SIZE);
arr->size = 0;
arr->capacity = INITIAL_SIZE;
return arr;
}
/**
* Destroy an array object and release the associated memory.
* \param arr The array to destroy.
*/
void array_destroy(Array arr)
{
free(arr->contents);
free(arr);
}
/**
* Get the number of item in the array.
* \param arr The array to query.
* \returns The number elements currently in the array.
*/
int array_size(Array arr)
{
return arr->size;
}
/**
* Add a new item to the end of the array, growing the array if necessary.
* \param arr The array object.
* \param item The item to add.
*/
void array_add(Array arr, void* item)
{
if (arr->size == arr->capacity)
{
arr->capacity *= 2;
arr->contents = (void**)realloc(arr->contents, arr->capacity);
}
arr->contents[arr->size] = item;
arr->size++;
}
/**
* Retrieve the item at the specified index in the array.
* \param arr The array to query.
* \param index The index of the item to retrieve.
* \returns A pointer to the item.
*/
void* array_item(Array arr, int index)
{
return arr->contents[index];
}
/**
* Store an item at a particular index in the array, overwriting any existing value.
* \param arr The array.
* \param index The index at which to store the item
* \param item The new item.
*/
void array_set(Array arr, int index, void* item)
{
arr->contents[index] = item;
}
/**
* Append the contents of one array to another.
* \param dest The destination array.
* \param src The source array.
*/
void array_append(Array dest, Array src)
{
int i;
for (i = 0; i < src->size; ++i)
{
array_add(dest, src->contents[i]);
}
}
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