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Diffstat (limited to 'lib/libstand/dosfs.h')
| -rw-r--r-- | lib/libstand/dosfs.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/lib/libstand/dosfs.h b/lib/libstand/dosfs.h new file mode 100644 index 000000000000..e44b6b51f288 --- /dev/null +++ b/lib/libstand/dosfs.h @@ -0,0 +1,120 @@ +/* + * Copyright (c) 1996, 1998 Robert Nordier + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef DOSIO_H +#define DOSIO_H + +/* + * DOS file attributes + */ + +#define FA_RDONLY 001 /* read-only */ +#define FA_HIDDEN 002 /* hidden file */ +#define FA_SYSTEM 004 /* system file */ +#define FA_LABEL 010 /* volume label */ +#define FA_DIR 020 /* directory */ +#define FA_ARCH 040 /* archive (file modified) */ +#define FA_XDE 017 /* extended directory entry */ +#define FA_MASK 077 /* all attributes */ + +/* + * Macros to convert DOS-format 16-bit and 32-bit quantities + */ + +#define cv2(p) ((u_int16_t)(p)[0] | \ + ((u_int16_t)(p)[1] << 010)) +#define cv4(p) ((u_int32_t)(p)[0] | \ + ((u_int32_t)(p)[1] << 010) | \ + ((u_int32_t)(p)[2] << 020) | \ + ((u_int32_t)(p)[3] << 030)) + +/* + * Directory, filesystem, and file structures. + */ + +typedef struct { + u_char x_case; /* case */ + u_char c_hsec; /* created: secs/100 */ + u_char c_time[2]; /* created: time */ + u_char c_date[2]; /* created: date */ + u_char a_date[2]; /* accessed: date */ + u_char h_clus[2]; /* clus[hi] */ +} DOS_DEX; + +typedef struct { + u_char name[8]; /* name */ + u_char ext[3]; /* extension */ + u_char attr; /* attributes */ + DOS_DEX dex; /* VFAT/FAT32 only */ + u_char time[2]; /* modified: time */ + u_char date[2]; /* modified: date */ + u_char clus[2]; /* starting cluster */ + u_char size[4]; /* size */ +} DOS_DE; + +typedef struct { + u_char seq; /* flags */ + u_char name1[5][2]; /* 1st name area */ + u_char attr; /* (see fat_de) */ + u_char res; /* reserved */ + u_char chk; /* checksum */ + u_char name2[6][2]; /* 2nd name area */ + u_char clus[2]; /* (see fat_de) */ + u_char name3[2][2]; /* 3rd name area */ +} DOS_XDE; + +typedef union { + DOS_DE de; /* standard directory entry */ + DOS_XDE xde; /* extended directory entry */ +} DOS_DIR; + +typedef struct { + struct open_file *fd; /* file descriptor */ + u_char *buf; /* buffer */ + u_int bufsec; /* buffered sector */ + u_int links; /* active links to structure */ + u_int spc; /* sectors per cluster */ + u_int bsize; /* cluster size in bytes */ + u_int bshift; /* cluster conversion shift */ + u_int dirents; /* root directory entries */ + u_int spf; /* sectors per fat */ + u_int rdcl; /* root directory start cluster */ + u_int lsnfat; /* start of fat */ + u_int lsndir; /* start of root dir */ + u_int lsndta; /* start of data area */ + u_int fatsz; /* FAT entry size */ + u_int xclus; /* maximum cluster number */ +} DOS_FS; + +typedef struct { + DOS_FS *fs; /* associated filesystem */ + DOS_DE de; /* directory entry */ + u_int offset; /* current offset */ + u_int c; /* last cluster read */ +} DOS_FILE; + +#endif /* !DOSIO_H */ |