160 lines
4.6 KiB
C
160 lines
4.6 KiB
C
/*
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* vim:ts=8:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009 Michael Stapelberg and contributors
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*
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* See file LICENSE for license information.
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*
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*/
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#include <xcb/xcb.h>
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#include <err.h>
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#include "data.h"
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#ifndef _UTIL_H
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#define _UTIL_H
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#define die(...) errx(EXIT_FAILURE, __VA_ARGS__);
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#define exit_if_null(pointer, ...) { if (pointer == NULL) die(__VA_ARGS__); }
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#define STARTS_WITH(string, needle) (strncasecmp(string, needle, strlen(needle)) == 0)
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#define CIRCLEQ_NEXT_OR_NULL(head, elm, field) (CIRCLEQ_NEXT(elm, field) != CIRCLEQ_END(head) ? \
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CIRCLEQ_NEXT(elm, field) : NULL)
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#define CIRCLEQ_PREV_OR_NULL(head, elm, field) (CIRCLEQ_PREV(elm, field) != CIRCLEQ_END(head) ? \
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CIRCLEQ_PREV(elm, field) : NULL)
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#define FOR_TABLE(workspace) \
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for (int cols = 0; cols < (workspace)->cols; cols++) \
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for (int rows = 0; rows < (workspace)->rows; rows++)
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#define FREE(pointer) do { \
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if (pointer != NULL) { \
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free(pointer); \
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pointer = NULL; \
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} \
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} \
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while (0)
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int min(int a, int b);
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int max(int a, int b);
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/**
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* Updates *destination with new_value and returns true if it was changed or false
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* if it was the same
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*
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*/
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bool update_if_necessary(uint32_t *destination, const uint32_t new_value);
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/**
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* Safe-wrapper around malloc which exits if malloc returns NULL (meaning that
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* there is no more memory available)
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*
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*/
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void *smalloc(size_t size);
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/**
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* Safe-wrapper around calloc which exits if malloc returns NULL (meaning that
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* there is no more memory available)
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*
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*/
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void *scalloc(size_t size);
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/**
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* Safe-wrapper around realloc which exits if realloc returns NULL (meaning
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* that there is no more memory available).
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*
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*/
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void *srealloc(void *ptr, size_t size);
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/**
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* Safe-wrapper around strdup which exits if malloc returns NULL (meaning that
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* there is no more memory available)
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*
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*/
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char *sstrdup(const char *str);
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/**
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* Starts the given application by passing it through a shell. We use double
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* fork to avoid zombie processes. As the started application’s parent exits
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* (immediately), the application is reparented to init (process-id 1), which
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* correctly handles childs, so we don’t have to do it :-).
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*
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* The shell is determined by looking for the SHELL environment variable. If
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* it does not exist, /bin/sh is used.
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*
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*/
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void start_application(const char *command);
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/**
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* Checks a generic cookie for errors and quits with the given message if
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* there was an error.
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*
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*/
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void check_error(xcb_connection_t *conn, xcb_void_cookie_t cookie,
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char *err_message);
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/**
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* Converts the given string to UCS-2 big endian for use with
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* xcb_image_text_16(). The amount of real glyphs is stored in real_strlen, a
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* buffer containing the UCS-2 encoded string (16 bit per glyph) is
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* returned. It has to be freed when done.
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*
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*/
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char *convert_utf8_to_ucs2(char *input, int *real_strlen);
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#if 0
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/**
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* Returns the client which comes next in focus stack (= was selected before) for
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* the given container, optionally excluding the given client.
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*
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*/
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Client *get_last_focused_client(xcb_connection_t *conn, Container *container,
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Client *exclude);
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#endif
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#if 0
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/**
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* Sets the given client as focused by updating the data structures correctly,
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* updating the X input focus and finally re-decorating both windows (to
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* signalize the user the new focus situation)
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*
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*/
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void set_focus(xcb_connection_t *conn, Client *client, bool set_anyways);
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/**
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* Called when the user switches to another mode or when the container is
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* destroyed and thus needs to be cleaned up.
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*
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*/
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void leave_stack_mode(xcb_connection_t *conn, Container *container);
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/**
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* Switches the layout of the given container taking care of the necessary
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* house-keeping
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*
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*/
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void switch_layout_mode(xcb_connection_t *conn, Container *container, int mode);
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/**
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* Gets the first matching client for the given window class/window title.
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* If the paramater specific is set to a specific client, only this one
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* will be checked.
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*
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*/
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Client *get_matching_client(xcb_connection_t *conn,
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const char *window_classtitle, Client *specific);
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#endif
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/*
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* Restart i3 in-place
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* appends -a to argument list to disable autostart
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*
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*/
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void i3_restart();
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#if defined(__OpenBSD__)
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/* OpenBSD does not provide memmem(), so we provide FreeBSD’s implementation */
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void *memmem(const void *l, size_t l_len, const void *s, size_t s_len);
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#endif
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#endif
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