/*
- * vim:ts=8:expandtab
+ * vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
+ * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
- * © 2009 Michael Stapelberg and contributors
- *
- * See file LICENSE for license information.
+ * util.c: Utility functions, which can be useful everywhere within i3 (see
+ * also libi3).
*
*/
-#include <xcb/xcb.h>
+#ifndef _UTIL_H
+#define _UTIL_H
+
#include <err.h>
#include "data.h"
-#ifndef _UTIL_H
-#define _UTIL_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 FOR_TABLE(workspace) \
for (int cols = 0; cols < (workspace)->cols; cols++) \
for (int rows = 0; rows < (workspace)->rows; rows++)
+
+#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 { \
if (pointer != NULL) { \
free(pointer); \
} \
while (0)
+#define CALL(obj, member, ...) obj->member(obj, ## __VA_ARGS__)
+
int min(int a, int b);
int max(int a, int b);
bool rect_contains(Rect rect, uint32_t x, uint32_t y);
bool update_if_necessary(uint32_t *destination, const uint32_t new_value);
/**
- * Safe-wrapper around malloc which exits if malloc returns NULL (meaning that
- * there is no more memory available)
+ * exec()s an i3 utility, for example the config file migration script or
+ * i3-nagbar. This function first searches $PATH for the given utility named,
+ * then falls back to the dirname() of the i3 executable path and then falls
+ * back to the dirname() of the target of /proc/self/exe (on linux).
*
- */
-void *smalloc(size_t size);
-
-/**
- * Safe-wrapper around calloc which exits if malloc returns NULL (meaning that
- * there is no more memory available)
- *
- */
-void *scalloc(size_t size);
-
-/**
- * Safe-wrapper around realloc which exits if realloc returns NULL (meaning
- * that there is no more memory available).
- *
- */
-void *srealloc(void *ptr, size_t size);
-
-/**
- * Safe-wrapper around strdup which exits if malloc returns NULL (meaning that
- * there is no more memory available)
+ * This function should be called after fork()ing.
*
- */
-char *sstrdup(const char *str);
-
-/**
- * Starts the given application by passing it through a shell. We use double
- * fork to avoid zombie processes. As the started application’s parent exits
- * (immediately), the application is reparented to init (process-id 1), which
- * correctly handles childs, so we don’t have to do it :-).
+ * The first argument of the given argv vector will be overwritten with the
+ * executable name, so pass NULL.
*
- * The shell is determined by looking for the SHELL environment variable. If
- * it does not exist, /bin/sh is used.
+ * If the utility cannot be found in any of these locations, it exits with
+ * return code 2.
*
*/
-void start_application(const char *command);
+void exec_i3_utility(char *name, char *argv[]);
/**
* Checks a generic cookie for errors and quits with the given message if
char *err_message);
/**
- * Converts the given string to UCS-2 big endian for use with
- * xcb_image_text_16(). The amount of real glyphs is stored in real_strlen, a
- * buffer containing the UCS-2 encoded string (16 bit per glyph) is
- * returned. It has to be freed when done.
- *
- */
-char *convert_utf8_to_ucs2(char *input, int *real_strlen);
-
-/*
* This function resolves ~ in pathnames.
* It may resolve wildcards in the first part of the path, but if no match
* or multiple matches are found, it just returns a copy of path as given.
*/
char *resolve_tilde(const char *path);
-/*
+/**
* Checks if the given path exists by calling stat().
*
*/
bool path_exists(const char *path);
-/*
+
+/**
+ * Returns the name of a temporary file with the specified prefix.
+ *
+ */
+char *get_process_filename(const char *prefix);
+
+/**
* Restart i3 in-place
* appends -a to argument list to disable autostart
*
*/
-void i3_restart();
+void i3_restart(bool forget_layout);
+
+#if defined(__OpenBSD__) || defined(__APPLE__)
+
+/*
+ * Taken from FreeBSD
+ * Find the first occurrence of the byte string s in byte string l.
+ *
+ */
+void *memmem(const void *l, size_t l_len, const void *s, size_t s_len);
+
+#endif
#endif
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