Add devoptab support to replace the libioushax devoptab

source/devoptab/devoptab_fsa_diropen.cpp

@@ -0,0 +1,41 @@
+#include "devoptab_fsa.h"
+#include "logger.h"
+#include <mutex>
+
+DIR_ITER *
+__fsa_diropen(struct _reent *r,
+              DIR_ITER *dirState,
+              const char *path) {
+    FSADirectoryHandle fd;
+    FSError status;
+
+    if (!dirState || !path) {
+        r->_errno = EINVAL;
+        return nullptr;
+    }
+
+    char *fixedPath = __fsa_fixpath(r, path);
+    if (!fixedPath) {
+        return nullptr;
+    }
+    auto *dir = (__fsa_dir_t *) (dirState->dirStruct);
+    strncpy(dir->name, fixedPath, sizeof(dir->name) - 1);
+    free(fixedPath);
+
+    dir->mutex.init(dir->name);
+    std::lock_guard<MutexWrapper> lock(dir->mutex);
+
+    auto *deviceData = (FSADeviceData *) r->deviceData;
+    status           = FSAOpenDir(deviceData->clientHandle, dir->name, &fd);
+    if (status < 0) {
+        DEBUG_FUNCTION_LINE_ERR("FSAOpenDir(0x%08X, %s, 0x%08X) failed: %s",
+                                deviceData->clientHandle, dir->name, &fd, FSAGetStatusStr(status));
+        r->_errno = __fsa_translate_error(status);
+        return nullptr;
+    }
+
+    dir->magic = FSA_DIRITER_MAGIC;
+    dir->fd    = fd;
+    memset(&dir->entry_data, 0, sizeof(dir->entry_data));
+    return dirState;
+}