Ensure all *.[ch] files include config.h

Including config.h is necessary to get e.g. the _GNU_SOURCE define and
any other definitions that autoconf declares. Hence, config.h needs to
be included as the first header in each file.

This is done either via:
1. Including "common.h" (i3bar)
2. Including "libi3.h"
3. Including "all.h" (i3)
4. Including <config.h> directly

Also remove now-unused I3__FILE__, add copyright/license statement
where missing and switch include/all.h to #pragma once.

libi3/dpi.c

@@ -6,6 +6,7 @@
  *
  */
 #include "libi3.h"
+
 #include <math.h>
 #include <stdlib.h>
 #include <xcb/xcb_xrm.h>

libi3/draw_util.c

@@ -6,6 +6,8 @@
  * draw.c: Utility for drawing.
  *
  */
+#include "libi3.h"
+
 #include <stdlib.h>
 #include <err.h>
 #include <string.h>
@@ -13,8 +15,6 @@
 #include <xcb/xcb_aux.h>
 #include <cairo/cairo-xcb.h>
 
-#include "libi3.h"
-
 /* The default visual_type to use if none is specified when creating the surface. Must be defined globally. */
 xcb_visualtype_t *visual_type;
 

libi3/fake_configure_notify.c

@@ -5,14 +5,14 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <stdlib.h>
 #include <stdbool.h>
 
 #include <xcb/xcb.h>
 #include <xcb/xproto.h>
 
-#include "libi3.h"
-
 /*
  * Generates a configure_notify event and sends it to the given window
  * Applications need this to think they’ve configured themselves correctly.

libi3/font.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <assert.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -15,8 +17,6 @@
 #include <cairo/cairo-xcb.h>
 #include <pango/pangocairo.h>
 
-#include "libi3.h"
-
 static const i3Font *savedFont = NULL;
 
 static xcb_visualtype_t *root_visual_type;

libi3/format_placeholders.c

@@ -5,12 +5,12 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
 
-#include "libi3.h"
-
 #ifndef STARTS_WITH
 #define STARTS_WITH(string, needle) (strncasecmp((string), (needle), strlen((needle))) == 0)
 #endif

libi3/get_colorpixel.c

@@ -5,13 +5,13 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
 
 #include "queue.h"
-#include "libi3.h"
-
 struct Colorpixel {
     char hex[8];
     uint32_t pixel;

libi3/get_config_path.c

@@ -6,6 +6,7 @@
  *
  */
 #include "libi3.h"
+
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>

libi3/get_exe_path.c

@@ -1,3 +1,12 @@
+/*
+ * vim:ts=4:sw=4:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
+ *
+ */
+#include "libi3.h"
+
 #include <unistd.h>
 #include <string.h>
 #include <stdio.h>
@@ -5,8 +14,6 @@
 #include <stdlib.h>
 #include <errno.h>
 
-#include "libi3.h"
-
 /*
  * This function returns the absolute path to the executable it is running in.
  *

libi3/get_mod_mask.c

@@ -5,13 +5,13 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <stdint.h>
 #include <stdlib.h>
 #include <xcb/xcb.h>
 #include <xcb/xcb_keysyms.h>
 
-#include "libi3.h"
-
 /*
  * All-in-one function which returns the modifier mask (XCB_MOD_MASK_*) for the
  * given keysymbol, for example for XCB_NUM_LOCK (usually configured to mod2).

libi3/get_process_filename.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <assert.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -17,8 +19,6 @@
 #include <unistd.h>
 #include <err.h>
 
-#include "libi3.h"
-
 /*
  * Returns the name of a temporary file with the specified prefix.
  *

libi3/ipc_connect.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -14,8 +16,6 @@
 #include <unistd.h>
 #include <fcntl.h>
 
-#include "libi3.h"
-
 /*
  * Connects to the i3 IPC socket and returns the file descriptor for the
  * socket. die()s if anything goes wrong.

libi3/ipc_recv_message.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -14,8 +16,6 @@
 
 #include <i3/ipc.h>
 
-#include "libi3.h"
-
 /*
  * Reads a message from the given socket file descriptor and stores its length
  * (reply_length) as well as a pointer to its contents (reply).

libi3/ipc_send_message.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -14,8 +16,6 @@
 
 #include <i3/ipc.h>
 
-#include "libi3.h"
-
 /*
  * Formats a message (payload) of the given size and type and sends it to i3 via
  * the given socket file descriptor.

libi3/is_debug_build.c

@@ -1,3 +1,12 @@
+/*
+ * vim:ts=4:sw=4:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
+ *
+ */
+#include "libi3.h"
+
 #include <string.h>
 #include <stdbool.h>
 

libi3/mkdirp.c

@@ -1,4 +1,12 @@
+/*
+ * vim:ts=4:sw=4:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
+ *
+ */
 #include "libi3.h"
+
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>

libi3/resolve_tilde.c

@@ -5,8 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
-
 #include "libi3.h"
+
 #include <err.h>
 #include <glob.h>
 #include <stdlib.h>

libi3/root_atom_contents.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <stdio.h>
 #include <string.h>
 #include <stdbool.h>
@@ -15,8 +17,6 @@
 #include <xcb/xcb.h>
 #include <xcb/xcb_aux.h>
 
-#include "libi3.h"
-
 /*
  * Try to get the contents of the given atom (for example I3_SOCKET_PATH) from
  * the X11 root window and return NULL if it doesn’t work.

libi3/safewrappers.c

@@ -5,6 +5,8 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdarg.h>
@@ -13,8 +15,6 @@
 #include <err.h>
 #include <errno.h>
 
-#include "libi3.h"
-
 /*
  * The s* functions (safe) are wrappers around malloc, strdup, …, which exits if one of
  * the called functions returns NULL, meaning that there is no more memory available

libi3/string.c

@@ -9,14 +9,13 @@
  *           others want UTF-8 (Pango).
  *
  */
+#include "libi3.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include <glib.h>
 
-#include "libi3.h"
-
 struct _i3String {
     char *utf8;
     xcb_char2b_t *ucs2;

libi3/strndup.c

@@ -5,11 +5,11 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <sys/types.h>
 #include <string.h>
 
-#include "libi3.h"
-
 #if defined(__APPLE__)
 
 /*

libi3/ucs2_conversion.c

@@ -5,14 +5,14 @@
  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
  *
  */
+#include "libi3.h"
+
 #include <err.h>
 #include <errno.h>
 #include <iconv.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "libi3.h"
-
 static iconv_t utf8_conversion_descriptor = (iconv_t)-1;
 static iconv_t ucs2_conversion_descriptor = (iconv_t)-1;