#define AO_FAT_DENT_EMPTY 0xe5
#define AO_FAT_DENT_END 0x00
-#define AO_FAT_IS_FILE(attr) (((attr) & (AO_FAT_FILE_VOLUME_LABEL|AO_FAT_FILE_DIRECTORY|AO_FAT_FILE_ARCHIVE)) == 0)
-#define AO_FAT_IS_DIR(attr) (((attr) & (AO_FAT_FILE_DIRECTORY)) == AO_FAT_FILE_DIRECTORY)
+#define AO_FAT_IS_FILE(attr) (((attr) & (AO_FAT_FILE_VOLUME_LABEL|AO_FAT_FILE_DIRECTORY)) == 0)
+#define AO_FAT_IS_DIR(attr) (((attr) & (AO_FAT_FILE_DIRECTORY|AO_FAT_FILE_VOLUME_LABEL)) == AO_FAT_FILE_DIRECTORY)
+/* API error codes */
#define AO_FAT_SUCCESS 0
#define AO_FAT_EPERM 1
#define AO_FAT_ENOENT 2
#define AO_FAT_EMFILE 24
#define AO_FAT_EFBIG 27
#define AO_FAT_ENOSPC 28
+#define AO_FAT_EDIREOF 29
+
+/* ao_fat_setup return values */
+#define AO_FAT_FILESYSTEM_SUCCESS 0
+#define AO_FAT_FILESYSTEM_MBR_READ_FAILURE 1
+#define AO_FAT_FILESYSTEM_INVALID_MBR_SIGNATURE 2
+#define AO_FAT_FILESYSTEM_INVALID_PARTITION_TYPE 3
+#define AO_FAT_FILESYSTEM_ZERO_SIZED_PARTITION 4
+
+#define AO_FAT_FILESYSTEM_BOOT_READ_FAILURE 5
+#define AO_FAT_FILESYSTEM_INVALID_BOOT_SIGNATURE 6
+#define AO_FAT_FILESYSTEM_INVALID_SECTOR_SIZE 7
+
+void
+ao_fat_sync(void);
+
+void
+ao_fat_unmount(void);
+
+int8_t
+ao_fat_full(void);
int8_t
ao_fat_open(char name[11], uint8_t mode);
ao_fat_creat(char name[11]);
int8_t
-ao_fat_close(void);
+ao_fat_close(int8_t fd);
int
-ao_fat_read(void *dest, int len);
+ao_fat_read(int8_t fd, void *dest, int len);
int
-ao_fat_write(void *src, int len);
+ao_fat_write(int8_t fd, void *src, int len);
#define AO_FAT_SEEK_SET 0
#define AO_FAT_SEEK_CUR 1
#define AO_FAT_SEEK_END 2
int32_t
-ao_fat_seek(int32_t pos, uint8_t whence);
+ao_fat_seek(int8_t fd, int32_t pos, uint8_t whence);
int8_t
ao_fat_unlink(char name[11]);
int8_t
ao_fat_rename(char old[11], char new[11]);
+/*
+ * Byte offset within a file. Supports files up to 2GB in size
+ */
+typedef int32_t ao_fat_offset_t;
+
+/*
+ * Cluster index in partition data space
+ */
+typedef uint32_t ao_fat_cluster_t;
+
+/*
+ * Sector offset within partition
+ */
+typedef uint32_t ao_fat_sector_t;
+
+/*
+ * Index within the root directory
+ */
+typedef uint16_t ao_fat_dirent_t;
+
+/*
+ * Offset within a cluster (or sector)
+ */
+typedef uint16_t ao_fat_cluster_offset_t;
+
struct ao_fat_dirent {
- char name[11];
- uint8_t attr;
- uint32_t size;
- uint16_t cluster;
- uint16_t entry;
+ char name[11];
+ uint8_t attr;
+ uint32_t size;
+ ao_fat_cluster_t cluster;
+ uint16_t entry;
};
int8_t