merge macos.c and macos.m, update ios.*

* Merged macos.c into macos.m.
* Updated ios.h and ios.c to be compatible with the macos.* changes.
* Renamed ios.c to ios.m.

src/ios.m

@@ -0,0 +1,82 @@
+/*
+  ios.c
+
+  Copyright (c) 2021
+  http://www.tuxpaint.org/
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+  (See COPYING.txt)
+*/
+#include <string.h>
+#include <sys/stat.h>
+#include <libgen.h>
+#include <limits.h>
+#include "ios.h"
+
+#define IOS_FONTS_PATH              "../Library/Fonts"
+#define IOS_PREFERENCES_PATH        "../Library/Application Support/TuxPaint"
+#define IOS_PICTURES_PATH           "../Documents"
+
+
+/* Recursively mkdir */
+static int _mkdir_r(const char *path)
+{
+    const char parent[PATH_MAX];
+
+    if(!dirname_r(path, parent)) return 1;   /* parent = dirname(path)   */
+    if(strcmp(parent, ".") == 0) return 0;   /* if(parent == ".") return */
+
+    _mkdir_r(parent);                        /* mkdir_r(parent) */
+    return mkdir(path, 0777);                /* mkdir(path)     */
+}
+
+
+void apple_init(void)
+{
+    /* this function intentionally left blank */
+}
+
+
+const char *apple_fontsPath(void)
+{
+    return IOS_FONTS_PATH;
+}
+
+
+const char *apple_preferencesPath(void)
+{
+    static int init = 0;
+
+    /* Ensure the preferences path exists */
+    if(!init) {
+        _mkdir_r(IOS_PREFERENCES_PATH);
+
+        init = 1;
+    }
+
+    return IOS_PREFERENCES_PATH;
+}
+
+
+const char *apple_globalPreferencesPath(void)
+{
+    return apple_preferencesPath();
+}
+
+
+const char *apple_picturesPath(void)
+{
+    return IOS_PICTURES_PATH;
+}