Refactor freqman_db parsing (#1244)

* WIP freqman changes/memory perf/stash
* Split ui tone_key function out for testing.
* Add more tests and fix bugs.
* Use default max_entries in recond
* Set limit back to 90 for now

firmware/test/application/linker_stubs.cpp

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2023 Kyle Reed
+ *
+ * This file is part of PortaPack.
+ *
+ * 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, 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; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/* This file contains stub functions necessary to enable linking.
+ * Try to minimize dependecies by breaking code into separate files
+ * or using templates and mock types. Because the test code is built
+ * and executed on the dev machine, a lot of core firmware code
+ * will not or cannot work (e.g. filesystem). We could build abstractions
+ * but that's just device overhead that only supports testing. */
+
+#include <string>
+
+/* FatFS stubs */
+#include "ff.h"
+FRESULT f_close(FIL*) {
+    return FR_OK;
+}
+FRESULT f_closedir(DIR*) {
+    return FR_OK;
+}
+FRESULT f_findfirst(DIR*, FILINFO*, const TCHAR*, const TCHAR*) {
+    return FR_OK;
+}
+FRESULT f_findnext(DIR*, FILINFO*) {
+    return FR_OK;
+}
+FRESULT f_getfree(const TCHAR*, DWORD*, FATFS**) {
+    return FR_OK;
+}
+FRESULT f_lseek(FIL*, FSIZE_t) {
+    return FR_OK;
+}
+FRESULT f_mkdir(const TCHAR*) {
+    return FR_OK;
+}
+FRESULT f_open(FIL*, const TCHAR*, BYTE) {
+    return FR_OK;
+}
+FRESULT f_read(FIL*, void*, UINT, UINT*) {
+    return FR_OK;
+}
+FRESULT f_rename(const TCHAR*, const TCHAR*) {
+    return FR_OK;
+}
+FRESULT f_stat(const TCHAR*, FILINFO*) {
+    return FR_OK;
+}
+FRESULT f_sync(FIL*) {
+    return FR_OK;
+}
+FRESULT f_truncate(FIL*) {
+    return FR_OK;
+}
+FRESULT f_unlink(const TCHAR*) {
+    return FR_OK;
+}
+FRESULT f_write(FIL*, const void*, UINT, UINT*) {
+    return FR_OK;
+}
+
+/* Debug */
+void __debug_log(const std::string&) {}