diff options
Diffstat (limited to 'src/drivers/ao_fat.h')
| -rw-r--r-- | src/drivers/ao_fat.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/drivers/ao_fat.h b/src/drivers/ao_fat.h new file mode 100644 index 00000000..01435363 --- /dev/null +++ b/src/drivers/ao_fat.h @@ -0,0 +1,141 @@ +/* + * Copyright © 2013 Keith Packard <keithp@keithp.com> + * + * 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; version 2 of the License. + * + * 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; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#ifndef _AO_FAT_H_ +#define _AO_FAT_H_ + +void +ao_fat_init(void); + +#define AO_FAT_FILE_REGULAR 0x00 +#define AO_FAT_FILE_READ_ONLY 0x01 +#define AO_FAT_FILE_HIDDEN 0x02 +#define AO_FAT_FILE_SYSTEM 0x04 +#define AO_FAT_FILE_VOLUME_LABEL 0x08 +#define AO_FAT_FILE_DIRECTORY 0x10 +#define AO_FAT_FILE_ARCHIVE 0x20 + +#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)) == 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_EIO 4 +#define AO_FAT_EBADF 9 +#define AO_FAT_EACCESS 13 +#define AO_FAT_EEXIST 17 +#define AO_FAT_ENOTDIR 20 +#define AO_FAT_EISDIR 21 +#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); + +#define AO_FAT_OPEN_READ 0 +#define AO_FAT_OPEN_WRITE 1 +#define AO_FAT_OPEN_RW 2 + +int8_t +ao_fat_creat(char name[11]); + +int8_t +ao_fat_close(int8_t fd); + +int +ao_fat_read(int8_t fd, void *dest, int len); + +int +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(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; + ao_fat_cluster_t cluster; + uint16_t entry; +}; + +int8_t +ao_fat_readdir(uint16_t *entry, struct ao_fat_dirent *dirent); + +#endif /* _AO_FAT_H_ */ |