1/* Copyright (c) 2013-2015 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#ifndef VECTOR_H
 7#define VECTOR_H
 8
 9#include "util/common.h"
10
11#define DECLARE_VECTOR(NAME, TYPE) \
12	struct NAME { \
13		TYPE* vector; \
14		size_t size; \
15		size_t capacity; \
16	}; \
17	void NAME ## Init(struct NAME* vector, size_t capacity); \
18	void NAME ## Deinit(struct NAME* vector); \
19	TYPE* NAME ## GetPointer(struct NAME* vector, size_t location); \
20	void NAME ## Resize(struct NAME* vector, ssize_t change); \
21	void NAME ## Shift(struct NAME* vector, size_t location, size_t difference); \
22	void NAME ## Unshift(struct NAME* vector, size_t location, size_t difference); \
23	void NAME ## EnsureCapacity(struct NAME* vector, size_t capacity); \
24	size_t NAME ## Size(struct NAME* vector); \
25
26#define DEFINE_VECTOR(NAME, TYPE) \
27	void NAME ## Init(struct NAME* vector, size_t capacity) { \
28		vector->size = 0; \
29		if (capacity == 0) { \
30			capacity = 4; \
31		} \
32		vector->capacity = capacity; \
33		vector->vector = malloc(sizeof(TYPE) * capacity); \
34	} \
35	void NAME ## Deinit(struct NAME* vector) { \
36		free(vector->vector); \
37		vector->vector = 0; \
38		vector->capacity = 0; \
39	} \
40	TYPE* NAME ## GetPointer(struct NAME* vector, size_t location) { \
41		return &vector->vector[location]; \
42	} \
43	void NAME ## Resize(struct NAME* vector, ssize_t change) { \
44		if (change > 0) { \
45			NAME ## EnsureCapacity(vector, vector->size + change); \
46		} \
47		vector->size += change; \
48	} \
49	void NAME ## EnsureCapacity(struct NAME* vector, size_t capacity) { \
50		if (capacity <= vector->capacity) { \
51			return; \
52		} \
53		while (capacity > vector->capacity) { \
54			vector->capacity <<= 1; \
55		} \
56		vector->vector = realloc(vector->vector, vector->capacity * sizeof(TYPE)); \
57	} \
58	void NAME ## Shift(struct NAME* vector, size_t location, size_t difference) { \
59		memmove(&vector->vector[location], &vector->vector[location + difference], (vector->size - location - difference) * sizeof(TYPE)); \
60		vector->size -= difference; \
61	} \
62	void NAME ## Unshift(struct NAME* vector, size_t location, size_t difference) { \
63		NAME ## Resize(vector, difference); \
64		memmove(&vector->vector[location + difference], &vector->vector[location], (vector->size - location - difference) * sizeof(TYPE)); \
65	} \
66	size_t NAME ## Size(struct NAME* vector) { \
67		return vector->size; \
68	} \
69
70#endif