X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=libexfat%2Fexfat.h;h=4b0ebc9b9d36968527635a2e3ce1ab847ccc2b63;hb=db8d13fe0464766b33ddaf99711d679bdf2b16c4;hp=66ed078dff543c4f4ffe18b41c3062b1eff3b0f6;hpb=97a8c862e27f9b3a88c0935c76b849564efb5caa;p=android-x86%2Fexternal-exfat.git diff --git a/libexfat/exfat.h b/libexfat/exfat.h index 66ed078..4b0ebc9 100644 --- a/libexfat/exfat.h +++ b/libexfat/exfat.h @@ -3,11 +3,12 @@ Definitions of structures and constants used in exFAT file system implementation. - Copyright (C) 2009, 2010 Andrew Nayenko + Free exFAT implementation. + Copyright (C) 2010-2013 Andrew Nayenko - This program is free software: you can redistribute it and/or modify + 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, either version 3 of the License, or + the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, @@ -15,8 +16,9 @@ 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 . + 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., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef EXFAT_H_INCLUDED @@ -25,8 +27,10 @@ #include #include #include +#include #include #include +#include "compiler.h" #include "exfatfs.h" #include "version.h" @@ -36,19 +40,27 @@ #define EXFAT_ATTRIB_DIRTY 0x40000 #define EXFAT_ATTRIB_UNLINKED 0x80000 #define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0) -#define BLOCK_SIZE(sb) (1 << (sb).block_bits) -#define CLUSTER_SIZE(sb) (BLOCK_SIZE(sb) << (sb).bpc_bits) -#define CLUSTER_INVALID(c) ((c) == EXFAT_CLUSTER_BAD || (c) == EXFAT_CLUSTER_END) +#define SECTOR_SIZE(sb) (1 << (sb).sector_bits) +#define CLUSTER_SIZE(sb) (SECTOR_SIZE(sb) << (sb).spc_bits) +#define CLUSTER_INVALID(c) \ + ((c) < EXFAT_FIRST_DATA_CLUSTER || (c) > EXFAT_LAST_DATA_CLUSTER) #define MIN(a, b) ((a) < (b) ? (a) : (b)) +#define MAX(a, b) ((a) > (b) ? (a) : (b)) #define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d)) +#define ROUND_UP(x, d) (DIV_ROUND_UP(x, d) * (d)) +#define UTF8_BYTES(c) ((c) * 6) /* UTF-8 character can occupy up to 6 bytes */ +typedef size_t bitmap_t; +#define BMAP_SIZE(count) (ROUND_UP(count, sizeof(bitmap_t) * 8) / 8) +#define BMAP_BLOCK(index) ((index) / sizeof(bitmap_t) / 8) +#define BMAP_MASK(index) ((bitmap_t) 1 << ((index) % (sizeof(bitmap_t) * 8))) #define BMAP_GET(bitmap, index) \ - (((uint8_t*) bitmap)[(index) / 8] & (1u << ((index) % 8))) + ((bitmap)[BMAP_BLOCK(index)] & BMAP_MASK(index)) #define BMAP_SET(bitmap, index) \ - ((uint8_t*) bitmap)[(index) / 8] |= (1u << ((index) % 8)) + ((bitmap)[BMAP_BLOCK(index)] |= BMAP_MASK(index)) #define BMAP_CLR(bitmap, index) \ - ((uint8_t*) bitmap)[(index) / 8] &= ~(1u << ((index) % 8)) + ((bitmap)[BMAP_BLOCK(index)] &= ~BMAP_MASK(index)) struct exfat_node { @@ -69,10 +81,19 @@ struct exfat_node le16_t name[EXFAT_NAME_MAX + 1]; }; +enum exfat_mode +{ + EXFAT_MODE_RO, + EXFAT_MODE_RW, + EXFAT_MODE_ANY, +}; + +struct exfat_dev; + struct exfat { + struct exfat_dev* dev; struct exfat_super_block* sb; - int fd; le16_t* upcase; size_t upcase_chars; struct exfat_node* root; @@ -80,19 +101,18 @@ struct exfat { cluster_t start_cluster; uint32_t size; /* in bits */ - uint8_t* chunk; + bitmap_t* chunk; uint32_t chunk_size; /* in bits */ - int dirty; + bool dirty; } cmap; - char label[EXFAT_ENAME_MAX * 6 + 1]; /* a character can occupy up to - 6 bytes in UTF-8 */ - void* zero_block; + char label[UTF8_BYTES(EXFAT_ENAME_MAX) + 1]; + void* zero_cluster; int dmask, fmask; uid_t uid; gid_t gid; int ro; - int noatime; + bool noatime; }; /* in-core nodes iterator */ @@ -110,20 +130,26 @@ struct exfat_human_bytes extern int exfat_errors; -void exfat_bug(const char* format, ...) - __attribute__((format(printf, 1, 2), noreturn)); -void exfat_error(const char* format, ...) - __attribute__((format(printf, 1, 2))); -void exfat_warn(const char* format, ...) - __attribute__((format(printf, 1, 2))); -void exfat_debug(const char* format, ...) - __attribute__((format(printf, 1, 2))); - -void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd); -void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd); -ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node, +void exfat_bug(const char* format, ...) PRINTF NORETURN; +void exfat_error(const char* format, ...) PRINTF; +void exfat_warn(const char* format, ...) PRINTF; +void exfat_debug(const char* format, ...) PRINTF; + +struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode); +int exfat_close(struct exfat_dev* dev); +int exfat_fsync(struct exfat_dev* dev); +enum exfat_mode exfat_get_mode(const struct exfat_dev* dev); +off_t exfat_get_size(const struct exfat_dev* dev); +off_t exfat_seek(struct exfat_dev* dev, off_t offset, int whence); +ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size); +ssize_t exfat_write(struct exfat_dev* dev, const void* buffer, size_t size); +void exfat_pread(struct exfat_dev* dev, void* buffer, size_t size, + off_t offset); +void exfat_pwrite(struct exfat_dev* dev, const void* buffer, size_t size, + off_t offset); +ssize_t exfat_generic_pread(const struct exfat* ef, struct exfat_node* node, void* buffer, size_t size, off_t offset); -ssize_t exfat_write(struct exfat* ef, struct exfat_node* node, +ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node, const void* buffer, size_t size, off_t offset); int exfat_opendir(struct exfat* ef, struct exfat_node* dir, @@ -140,22 +166,21 @@ cluster_t exfat_next_cluster(const struct exfat* ef, const struct exfat_node* node, cluster_t cluster); cluster_t exfat_advance_cluster(const struct exfat* ef, struct exfat_node* node, uint32_t count); -void exfat_flush_cmap(struct exfat* ef); -int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size); +void exfat_flush(struct exfat* ef); +int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size, + bool erase); uint32_t exfat_count_free_clusters(const struct exfat* ef); +int exfat_find_used_sectors(const struct exfat* ef, off_t* a, off_t* b); void exfat_stat(const struct exfat* ef, const struct exfat_node* node, struct stat* stbuf); -time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec); -void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time, - uint8_t* centisec); void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n); uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry); uint16_t exfat_add_checksum(const void* entry, uint16_t sum); le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1, const struct exfat_entry_meta2* meta2, const le16_t* name); -uint32_t exfat_vbr_start_checksum(const void* block, size_t size); -uint32_t exfat_vbr_add_checksum(const void* block, size_t size, uint32_t sum); +uint32_t exfat_vbr_start_checksum(const void* sector, size_t size); +uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum); le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name); void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb); void exfat_print_info(const struct exfat_super_block* sb, @@ -186,4 +211,9 @@ int exfat_set_label(struct exfat* ef, const char* label); int exfat_mount(struct exfat* ef, const char* spec, const char* options); void exfat_unmount(struct exfat* ef); +time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec); +void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time, + uint8_t* centisec); +void exfat_tzset(void); + #endif /* ifndef EXFAT_H_INCLUDED */