util.h

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/*
 * vim:ts=4:sw=4:expandtab
 *
 * i3 - an improved dynamic tiling window manager
 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
 *
 * util.c: Utility functions, which can be useful everywhere within i3 (see
 *         also libi3).
 *
 */
#pragma once

#include <config.h>

#include <err.h>

#include "data.h"

#define die(...) errx(EXIT_FAILURE, __VA_ARGS__);
#define exit_if_null(pointer, ...) \
    {                              \
        if (pointer == NULL)       \
            die(__VA_ARGS__);      \
    }
#define STARTS_WITH(string, needle) (strncasecmp((string), (needle), strlen((needle))) == 0)
#define CIRCLEQ_NEXT_OR_NULL(head, elm, field) (CIRCLEQ_NEXT(elm, field) != CIRCLEQ_END(head) ? CIRCLEQ_NEXT(elm, field) : NULL)
#define CIRCLEQ_PREV_OR_NULL(head, elm, field) (CIRCLEQ_PREV(elm, field) != CIRCLEQ_END(head) ? CIRCLEQ_PREV(elm, field) : NULL)

#define NODES_FOREACH(head)                                                    \
    for (Con *child = (Con *)-1; (child == (Con *)-1) && ((child = 0), true);) \
    TAILQ_FOREACH(child, &((head)->nodes_head), nodes)

#define NODES_FOREACH_REVERSE(head)                                            \
    for (Con *child = (Con *)-1; (child == (Con *)-1) && ((child = 0), true);) \
    TAILQ_FOREACH_REVERSE(child, &((head)->nodes_head), nodes_head, nodes)

/* greps the ->nodes of the given head and returns the first node that matches the given condition */
#define GREP_FIRST(dest, head, condition) \
    NODES_FOREACH(head) {                 \
        if (!(condition))                 \
            continue;                     \
                                          \
        (dest) = child;                   \
        break;                            \
    }

#define FREE(pointer)   \
    do {                \
        free(pointer);  \
        pointer = NULL; \
    } while (0)

#define CALL(obj, member, ...) obj->member(obj, ##__VA_ARGS__)

#define SWAP(first, second, type) \
    do {                          \
        type tmp_SWAP = first;    \
        first = second;           \
        second = tmp_SWAP;        \
    } while (0)

int min(int a, int b);
int max(int a, int b);
bool rect_contains(Rect rect, uint32_t x, uint32_t y);
Rect rect_add(Rect a, Rect b);
Rect rect_sub(Rect a, Rect b);

__attribute__((pure)) bool name_is_digits(const char *name);

bool layout_from_name(const char *layout_str, layout_t *out);

long ws_name_to_number(const char *name);

bool update_if_necessary(uint32_t *destination, const uint32_t new_value);

void exec_i3_utility(char *name, char *argv[]);

bool path_exists(const char *path);

void i3_restart(bool forget_layout);

#if defined(__OpenBSD__) || defined(__APPLE__)

void *memmem(const void *l, size_t l_len, const void *s, size_t s_len);

#endif

char *pango_escape_markup(char *input);

void start_nagbar(pid_t *nagbar_pid, char *argv[]);

void kill_nagbar(pid_t *nagbar_pid, bool wait_for_it);

bool parse_long(const char *str, long *out, int base);

ssize_t slurp(const char *path, char **buf);

orientation_t orientation_from_direction(direction_t direction);