143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* util.c: Utility functions, which can be useful everywhere within i3 (see
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* also libi3).
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*
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*/
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#ifndef _UTIL_H
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#define _UTIL_H
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#include <err.h>
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#include "data.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 NODES_FOREACH(head) \
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for (Con *child = (Con*)-1; (child == (Con*)-1) && ((child = 0), true);) \
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TAILQ_FOREACH(child, &((head)->nodes_head), nodes)
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#define NODES_FOREACH_REVERSE(head) \
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for (Con *child = (Con*)-1; (child == (Con*)-1) && ((child = 0), true);) \
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TAILQ_FOREACH_REVERSE(child, &((head)->nodes_head), nodes_head, nodes)
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/* greps the ->nodes of the given head and returns the first node that matches the given condition */
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#define GREP_FIRST(dest, head, condition) \
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NODES_FOREACH(head) { \
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if (!(condition)) \
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continue; \
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\
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(dest) = child; \
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break; \
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}
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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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#define CALL(obj, member, ...) obj->member(obj, ## __VA_ARGS__)
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int min(int a, int b);
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int max(int a, int b);
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bool rect_contains(Rect rect, uint32_t x, uint32_t y);
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Rect rect_add(Rect a, Rect 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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* exec()s an i3 utility, for example the config file migration script or
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* i3-nagbar. This function first searches $PATH for the given utility named,
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* then falls back to the dirname() of the i3 executable path and then falls
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* back to the dirname() of the target of /proc/self/exe (on linux).
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*
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* This function should be called after fork()ing.
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*
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* The first argument of the given argv vector will be overwritten with the
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* executable name, so pass NULL.
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*
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* If the utility cannot be found in any of these locations, it exits with
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* return code 2.
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*
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*/
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void exec_i3_utility(char *name, char *argv[]);
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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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/**
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* This function resolves ~ in pathnames.
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* It may resolve wildcards in the first part of the path, but if no match
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* or multiple matches are found, it just returns a copy of path as given.
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*
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*/
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char *resolve_tilde(const char *path);
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/**
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* Checks if the given path exists by calling stat().
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*
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*/
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bool path_exists(const char *path);
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/**
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* Returns the name of a temporary file with the specified prefix.
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*
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*/
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char *get_process_filename(const char *prefix);
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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(bool forget_layout);
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#if defined(__OpenBSD__) || defined(__APPLE__)
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/*
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* Taken from FreeBSD
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* Find the first occurrence of the byte string s in byte string l.
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*
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*/
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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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