1/* swc: libswc/util.c
  2 *
  3 * Copyright (c) 2013, 2014 Michael Forney
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining a copy
  6 * of this software and associated documentation files (the "Software"), to deal
  7 * in the Software without restriction, including without limitation the rights
  8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  9 * copies of the Software, and to permit persons to whom the Software is
 10 * furnished to do so, subject to the following conditions:
 11 *
 12 * The above copyright notice and this permission notice shall be included in
 13 * all copies or substantial portions of the Software.
 14 *
 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 21 * SOFTWARE.
 22 */
 23
 24#ifndef SWC_UTIL_H
 25#define SWC_UTIL_H
 26
 27#include "swc.h"
 28
 29#include <pixman.h>
 30#include <stdbool.h>
 31#include <stdio.h>
 32#include <stdlib.h>
 33#include <string.h>
 34#include <sys/time.h>
 35#include <wayland-util.h>
 36
 37#define EXPORT __attribute__((visibility("default")))
 38
 39#if ENABLE_DEBUG
 40#define MESSAGE_SOURCE fprintf(stderr, "[swc:%s:%d] ", __FILE__, __LINE__);
 41#else
 42#define MESSAGE_SOURCE
 43#endif
 44
 45#define MESSAGE(type, format, ...)                                             \
 46	do {                                                                       \
 47		MESSAGE_SOURCE                                                         \
 48		fprintf(stderr, type ": " format, ##__VA_ARGS__);                      \
 49	} while (false)
 50
 51#define WARNING(format, ...) MESSAGE("WARNING", format, ##__VA_ARGS__)
 52#define ERROR(format, ...) MESSAGE("ERROR", format, ##__VA_ARGS__)
 53
 54#if ENABLE_DEBUG
 55#define DEBUG(format, ...) MESSAGE("DEBUG", format, ##__VA_ARGS__)
 56#else
 57#define DEBUG(format, ...)
 58#endif
 59
 60#define ARRAY_LENGTH(array) (sizeof(array) / sizeof(array)[0])
 61
 62#define MIN(a, b) ((a) < (b) ? (a) : (b))
 63#define MAX(a, b) ((a) > (b) ? (a) : (b))
 64
 65struct wl_resource;
 66struct wl_client;
 67
 68void
 69remove_resource(struct wl_resource *resource);
 70void
 71destroy_resource(struct wl_client *client, struct wl_resource *resource);
 72
 73static inline uint32_t
 74get_time(void)
 75{
 76	struct timeval timeval;
 77
 78	gettimeofday(&timeval, NULL);
 79	return timeval.tv_sec * 1000 + timeval.tv_usec / 1000;
 80}
 81
 82extern pixman_box32_t infinite_extents;
 83
 84static inline bool
 85rectangle_contains_point(const struct swc_rectangle *rectangle,
 86                         int32_t x,
 87                         int32_t y)
 88{
 89	return x > rectangle->x && x < rectangle->x + rectangle->width &&
 90	       y > rectangle->y && y < rectangle->y + rectangle->height;
 91}
 92
 93static inline bool
 94rectangle_overlap(const struct swc_rectangle *r1,
 95                  const struct swc_rectangle *r2)
 96{
 97	return (MAX(r1->x + r1->width, r2->x + r2->width) - MIN(r1->x, r2->x) <
 98	        r1->width + r2->width) &&
 99	       (MAX(r1->y + r1->height, r2->y + r2->height) - MIN(r1->y, r2->y) <
100	        r1->height + r2->height);
101}
102
103static inline void
104array_remove(struct wl_array *array, void *item, size_t size)
105{
106	size_t bytes =
107	    array->size - ((intptr_t)item + size - (intptr_t)array->data);
108	if (bytes > 0) {
109		memmove(item, (void *)((intptr_t)item + size), bytes);
110	}
111	array->size -= size;
112}
113
114#endif