mgba/src/util/vector.h

/* Copyright (c) 2013-2015 Jeffrey Pfau
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef VECTOR_H
#define VECTOR_H

#include "util/common.h"

#define DECLARE_VECTOR(NAME, TYPE) \
	struct NAME { \
		TYPE* vector; \
		size_t size; \
		size_t capacity; \
	}; \
	void NAME ## Init(struct NAME* vector, size_t capacity); \
	void NAME ## Deinit(struct NAME* vector); \
	TYPE* NAME ## GetPointer(struct NAME* vector, size_t location); \
	TYPE* NAME ## Append(struct NAME* vector); \
	void NAME ## Resize(struct NAME* vector, ssize_t change); \
	void NAME ## Shift(struct NAME* vector, size_t location, size_t difference); \
	void NAME ## Unshift(struct NAME* vector, size_t location, size_t difference); \
	void NAME ## EnsureCapacity(struct NAME* vector, size_t capacity); \
	size_t NAME ## Size(struct NAME* vector); \

#define DEFINE_VECTOR(NAME, TYPE) \
	void NAME ## Init(struct NAME* vector, size_t capacity) { \
		vector->size = 0; \
		if (capacity == 0) { \
			capacity = 4; \
		} \
		vector->capacity = capacity; \
		vector->vector = malloc(sizeof(TYPE) * capacity); \
	} \
	void NAME ## Deinit(struct NAME* vector) { \
		free(vector->vector); \
		vector->vector = 0; \
		vector->capacity = 0; \
	} \
	TYPE* NAME ## GetPointer(struct NAME* vector, size_t location) { \
		return &vector->vector[location]; \
	} \
	TYPE* NAME ## Append(struct NAME* vector) { \
		NAME ## Resize(vector, 1); \
		return &vector->vector[vector->size - 1]; \
	} \
	void NAME ## Resize(struct NAME* vector, ssize_t change) { \
		if (change > 0) { \
			NAME ## EnsureCapacity(vector, vector->size + change); \
		} \
		vector->size += change; \
	} \
	void NAME ## EnsureCapacity(struct NAME* vector, size_t capacity) { \
		if (capacity <= vector->capacity) { \
			return; \
		} \
		while (capacity > vector->capacity) { \
			vector->capacity <<= 1; \
		} \
		vector->vector = realloc(vector->vector, vector->capacity * sizeof(TYPE)); \
	} \
	void NAME ## Shift(struct NAME* vector, size_t location, size_t difference) { \
		memmove(&vector->vector[location], &vector->vector[location + difference], (vector->size - location - difference) * sizeof(TYPE)); \
		vector->size -= difference; \
	} \
	void NAME ## Unshift(struct NAME* vector, size_t location, size_t difference) { \
		NAME ## Resize(vector, difference); \
		memmove(&vector->vector[location + difference], &vector->vector[location], (vector->size - location - difference) * sizeof(TYPE)); \
	} \
	size_t NAME ## Size(struct NAME* vector) { \
		return vector->size; \
	} \

#endif