lib/src/fatdef.h

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#ifndef fatdef_h
#define fatdef_h

/* Access.h v1.3    Definitions for file access routines */

/*
        This is part of ODS2 written by Paul Nankervis,
        email address:  Paulnank@au1.ibm.com

        ODS2 is distributed freely for all members of the
        VMS community to use. However all derived works
        must maintain comments in their source to acknowledge
        the contibution of the original author.

        Originally part of access.h
*/

#define NO_DOLLAR

#define         FAT_C_UNDEFINED         0
#define         FAT_C_FIXED             1
#define         FAT_C_VARIABLE          2
#define         FAT_C_VFC               3
#define         FAT_C_STREAM            4
#define         FAT_C_STREAMLF          5
#define         FAT_C_STREAMCR          6
#define         FAT_C_SEQUENTIAL        0
#define         FAT_C_RELATIVE          1
#define         FAT_C_INDEXED           2
#define         FAT_C_DIRECT            3
#define         FAT_C_SPECIAL           4
#define         FAT_M_FORTRANCC         0x1
#define         FAT_M_IMPLIEDCC         0x2
#define         FAT_M_PRINTCC           0x4
#define         FAT_M_NOSPAN            0x8
#define         FAT_M_MSBRCW            0x10
#define         FAT_C_FIFO              1
#define         FAT_C_CHAR_SPECIAL      2
#define         FAT_C_BLOCK_SPECIAL     3
#define         FAT_C_SYMLINK           4
#define         FAT_K_LENGTH            32
#define         FAT_C_LENGTH            32
#define         FAT_S_FATDEF            32

/*              handling funny byte order */
/* socalled
Inverted format field. The high- and low-order 16 bits are transposed for compatibility with PDP-11 software.
*/

static inline unsigned long pdp_invert(unsigned long l) {
  unsigned short * s=&l;
  return (s[0]<<16) + s[1];
}

struct _fatdef {
    vmsbyte fat_b_rtype;
    vmsbyte fat_b_rattrib;
    vmsword fat_w_rsize;
  vmsswap fat_l_hiblk; /* funny byte order */
  vmsswap fat_l_efblk; /* funny byte order */
    vmsword fat_w_ffbyte;
    vmsbyte fat_b_bktsize;
    vmsbyte fat_b_vfcsize;
    vmsword fat_w_maxrec;
    vmsword fat_w_defext;
    vmsword fat_w_gbc;
    vmsbyte fat__UU0[8];
    vmsword fat_w_versions;
};

#endif

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