Add support for 'ftab' file format

1 files changed, 69 insertions, 0 deletions

diff --git a/src/ftab.h b/src/ftab.h
new file mode 100644
index 0000000..2efdac3
--- /dev/null
+++ b/src/ftab.h
@@ -0,0 +1,69 @@
+/*
+ * ftab.h
+ * Functions for handling the ftab format
+ *
+ * Copyright (c) 2019 Nikias Bassen. All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef IDEVICERESTORE_FTAB_H
+#define IDEVICERESTORE_FTAB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ftab_header {
+	uint32_t always_01; // 1
+	uint32_t always_ff; // 0xFFFFFFFF
+	uint32_t unk_0x08;  // 0
+	uint32_t unk_0x0C;  // 0
+	uint32_t unk_0x10;  // 0
+	uint32_t unk_0x14;  // 0
+	uint32_t unk_0x18;  // 0
+	uint32_t unk_0x1C;  // 0
+	uint32_t tag;       // e.g. 'rkos'
+	uint32_t magic;     // 'ftab' magic
+	uint32_t num_entries;
+	uint32_t pad_0x2C;
+};
+
+struct ftab_entry {
+	uint32_t tag;
+	uint32_t offset;
+	uint32_t size;
+	uint32_t pad_0x0C;
+};
+
+struct ftab_fmt {
+	struct ftab_header header;
+	struct ftab_entry *entries;
+	unsigned char **storage;
+};
+
+typedef struct ftab_fmt *ftab_t;
+
+int ftab_parse(unsigned char *data, unsigned int data_size, ftab_t *ftab, uint32_t *tag);
+int ftab_get_entry_ptr(ftab_t ftab, uint32_t tag, unsigned char **data, unsigned int *data_size);
+int ftab_add_entry(ftab_t ftab, uint32_t tag, unsigned char *data, unsigned int data_size);
+int ftab_write(ftab_t ftab, unsigned char **data, unsigned int *data_size);
+int ftab_free(ftab_t ftab);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif