Add get_*architecture() API, extend find_path*() API

* Add get_architecture(), get_primary_architecture(),
  get_secondary_architectures(), guess_architecture_for_path() to get
  the caller's architecture, the primary architecture, all secondary
  architectures, or the architecture associated with a specified path
  respectively.
* Rename the find_path*() functions to find_path*_etc() and add an
  optional architecture parameter. Add simplified find_path*()
  functions.
* BPathFinder: Add FindPath[s]() versions with an architecture
  parameter.

headers/private/system/architecture_private.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2013, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _SYSTEM_ARCHITECTURE_PRIVATE_H
+#define _SYSTEM_ARCHITECTURE_PRIVATE_H
+
+
+#include <Architecture.h>
+
+
+__BEGIN_DECLS
+
+
+const char*	__get_architecture();
+const char*	__get_primary_architecture();
+size_t		__get_secondary_architectures(const char** architectures,
+				size_t count);
+const char*	__guess_architecture_for_path(const char* path);
+
+
+__END_DECLS
+
+
+#endif	/* _SYSTEM_ARCHITECTURE_PRIVATE_H */

headers/private/system/find_directory_private.h

@@ -17,16 +17,31 @@ __BEGIN_DECLS
 status_t __find_directory(directory_which which, dev_t device, bool createIt,
 	char *returnedPath, int32 pathLength);
 
-status_t __find_path(const void* codePointer, const char* dependency,
-	path_base_directory baseDirectory, const char* subPath, uint32 flags,
-	char* pathBuffer, size_t bufferSize);
+status_t __find_path(const void* codePointer, path_base_directory baseDirectory,
+	const char* subPath, char* pathBuffer, size_t bufferSize);
 
-status_t __find_path_for_path(const char* path, const char* dependency,
-	path_base_directory baseDirectory, const char* subPath, uint32 flags,
-	char* pathBuffer, size_t bufferSize);
+status_t __find_path_etc(const void* codePointer, const char* dependency,
+	const char* architecture, path_base_directory baseDirectory,
+	const char* subPath, uint32 flags, char* pathBuffer, size_t bufferSize);
+
+status_t __find_path_for_path(const char* path,
+	path_base_directory baseDirectory, const char* subPath, char* pathBuffer,
+	size_t bufferSize);
+
+status_t __find_path_for_path_etc(const char* path, const char* dependency,
+	const char* architecture, path_base_directory baseDirectory,
+	const char* subPath, uint32 flags, char* pathBuffer, size_t bufferSize);
 
 status_t __find_paths(path_base_directory baseDirectory, const char* subPath,
-	uint32 flags, char*** _paths, size_t* _pathCount);
+	char*** _paths, size_t* _pathCount);
+
+status_t __find_paths_etc(const char* architecture,
+	path_base_directory baseDirectory, const char* subPath, uint32 flags,
+	char*** _paths, size_t* _pathCount);
+
+const char* __guess_secondary_architecture_from_path(const char* path,
+	const char* const* secondaryArchitectures,
+	size_t secondaryArchitectureCount);
 
 
 __END_DECLS