[rootless] Provide macro definitions when !TARGET_OS_IPHONE (#97)

These definitions should not rely on libroot which is currently
only available for iOS. This uses the definitions that were
previously used in a2a4086

rootless.h

@@ -1,3 +1,7 @@
+#include <TargetConditionals.h>
+
+#if TARGET_OS_IPHONE
+
 #include <libroot/libroot.h>
 
 #ifdef XINA_SUPPORT
@@ -9,3 +13,23 @@ _Pragma("message(\"'XINA_SUPPORT' is deprecated. libroot will now handle this fo
 
 #define ROOT_PATH_NS(nsPath) JBROOT_PATH_NSSTRING(nsPath)
 #define ROOT_PATH_NS_VAR(nsPath) JBROOT_PATH_NSSTRING(nsPath)
+
+#else
+
+// no libroot support
+
+#include <sys/syslimits.h>
+#include <string.h>
+
+#define ROOT_PATH(cPath) THEOS_PACKAGE_INSTALL_PREFIX cPath
+#define ROOT_PATH_NS(path) @THEOS_PACKAGE_INSTALL_PREFIX path
+
+#define ROOT_PATH_NS_VAR(path) [@THEOS_PACKAGE_INSTALL_PREFIX stringByAppendingPathComponent:path]
+#define ROOT_PATH_VAR(path) sizeof(THEOS_PACKAGE_INSTALL_PREFIX) > 1 ? ({ \
+    char outPath[PATH_MAX]; \
+    strlcpy(outPath, THEOS_PACKAGE_INSTALL_PREFIX, PATH_MAX); \
+    strlcat(outPath, path, PATH_MAX); \
+    outPath; \
+}) : path
+
+#endif