Stratosphere: Add lz4 library, add GetContentPath primitive to loader.

stratosphere/loader/source/ldr_location_resolver.cpp

@@ -0,0 +1,42 @@
+#include <switch.h>
+#include <string.h>
+
+#include "ldr_registration.hpp"
+#include "ldr_location_resolver.hpp"
+
+Result GetContentPath(char *out_path, u64 tid, FsStorageId sid) {
+    Result rc;
+    LrRegisteredLocationResolver reg;
+    LrLocationResolver lr;
+    char path[FS_MAX_PATH] = {0};
+    
+    /* Try to get the path from the registered resolver. */
+    if (R_FAILED(rc = lrGetRegisteredLocationResolver(&reg))) {
+        return rc;
+    }
+    
+    if (R_SUCCEEDED(rc = lrRegLrGetProgramPath(&reg, tid, path))) {
+        strncpy(out_path, path, sizeof(path));
+    } else if (rc != 0x408) {
+        return rc;
+    }
+    
+    serviceClose(&reg.s);
+    
+    /* If getting the path from the registered resolver fails, fall back to the normal resolver. */
+    if (R_FAILED(rc = lrGetLocationResolver(sid, &lr))) {
+        return rc;
+    }
+    
+    if (R_SUCCEEDED(rc = lrLrGetProgramPath(&lr, tid, path))) {
+        strncpy(out_path, path, sizeof(path));
+    }
+    
+    serviceClose(&lr.s);
+    
+    return rc;
+}
+
+Result GetContentPathForTidSid(char *out_path, Registration::TidSid *tid_sid) {
+    return GetContentPath(out_path, tid_sid->title_id, tid_sid->storage_id);
+}