Huge savedata driver refactor

bdk/libs/nx_savedata/save_data_directory.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2019-2020 shchmue
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ISC License
+
+hactool Copyright (c) 2018, SciresM
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "save_data_directory.h"
+
+#include <string.h>
+
+void save_data_directory_init(save_data_directory_ctx_t *ctx, hierarchical_save_file_table_ctx_t *table, save_find_position_t *position, open_directory_mode_t mode) {
+    ctx->parent_file_table = table;
+    ctx->initial_position = position;
+    ctx->_current_position = position;
+    ctx->mode = mode;
+}
+
+bool save_data_directory_read_impl(save_data_directory_ctx_t *ctx, uint64_t *out_entries_read, save_find_position_t *position, directory_entry_t *entry_buffer, uint64_t entry_count) {
+    hierarchical_save_file_table_ctx_t *tab = ctx->parent_file_table;
+    uint32_t i = 0;
+    save_file_info_t info;
+    char name[SAVE_FS_LIST_MAX_NAME_LENGTH];
+
+    if (ctx->mode & OPEN_DIR_MODE_DIR) {
+        while ((!entry_buffer || i < entry_count) && save_hierarchical_file_table_find_next_directory(tab, position, name)) {
+            directory_entry_t *entry = &entry_buffer[i];
+
+            memcpy(entry->name, name, SAVE_FS_LIST_MAX_NAME_LENGTH);
+            entry->name[SAVE_FS_LIST_MAX_NAME_LENGTH] = 0;
+            entry->type = DIR_ENT_TYPE_DIR;
+            entry->size = 0;
+
+            i++;
+        }
+    }
+
+    if (ctx->mode & OPEN_DIR_MODE_FILE) {
+        while ((!entry_buffer || i < entry_count) && save_hierarchical_file_table_find_next_file(tab, position, &info, name)) {
+            directory_entry_t *entry = &entry_buffer[i];
+
+            memcpy(entry->name, name, SAVE_FS_LIST_MAX_NAME_LENGTH);
+            entry->name[SAVE_FS_LIST_MAX_NAME_LENGTH] = 0;
+            entry->type = DIR_ENT_TYPE_FILE;
+            entry->size = 0;
+
+            i++;
+        }
+    }
+
+    *out_entries_read = i;
+
+    return true;
+}
+
+bool save_data_directory_read(save_data_directory_ctx_t *ctx, uint64_t *out_entries_read, directory_entry_t *entry_buffer, uint64_t entry_count) {
+    return save_data_directory_read_impl(ctx, out_entries_read, ctx->_current_position, entry_buffer, entry_count);
+}
+
+bool save_data_directory_get_entry_count(save_data_directory_ctx_t *ctx, uint64_t *out_entry_count) {
+    return save_data_directory_read_impl(ctx, out_entry_count, ctx->initial_position, NULL, 0);
+}