#ifndef    __BCF_H
#define    __BCF_H

/******************************************
  Binary config file format (32-bit only):
 */

#define BCF_MAG0     0x3f  /* b_ident[BI_MAG0] */
#define BCF_MAG1      'B'  /* b_ident[BI_MAG1] */
#define BCF_MAG2      'C'  /* b_ident[BI_MAG2] */
#define BCF_MAG3      'F'  /* b_ident[BI_MAG3] */

#define BCFMAG         "\77BCF"
#define SZBCFMAG       4

/* b_ident[BI_CLASS]: */
#define BCF_CLASS_NONE 0  /* invalid class  */
#define BCF_CLASS_32   1  /* 32-bit objects */
#define BCF_CLASS_64   2  /* 64-bit objects (reserved) */

/* b_ident[BI_DATA]: */
#define BCF_DATA_NONE  0  /* invalid data encoding  */
#define BCF_DATA_LSB   1  /* Least Significant Byte */
#define BCF_DATA_MSB   2  /* Most Significant Byte  */

#define BV_NONE        0  /* invalid version  */
#define BV_CURRENT     1  /* current file version b_ident[BI_VERSION] */

#define BCF_PAD        8  /* start of padding bytes in b_ident b_ident[BI_PAD] */

#define BI_MAG0        0  /* file identification */
#define BI_MAG1        1  /* file identification */
#define BI_MAG2        2  /* file identification */
#define BI_MAG3        3  /* file identification */
#define BI_CLASS       4  /* file class */
#define BI_DATA        5  /* data encoding */
#define BI_VERSION     6  /* file version */
#define BI_PAD         7  /* start of padding bytes */

#define BI_NIDENT    (16)  /* size of b_ident[] */

#define SI_NIDENT     (8)  /* size of b_ident[] */

/* Type for a 16-bit quantity: */
typedef uint16_t Bcf32_Half;

/* Type for a 32-bit quantity: */
typedef uint32_t Bcf32_Word;
typedef int32_t  Bcf32_Sword;

/* Type for a 64-bit quantity: */
typedef uint64_t Bcf32_Xword;
typedef int64_t  Bcf32_Sxword;

/* Types of address: */
typedef uint32_t Bcf32_Addr;

/* Types of file offsets: */
typedef uint32_t Bcf32_Off;

typedef struct {
  unsigned char b_ident[BI_NIDENT];
  Bcf32_Half    b_hsize;     /* BCF header's size in bytes */
  Bcf32_Word    b_fsize;     /* Whole BCF file size in bytes */

  Bcf32_Off     b_shoff;     /* section header table’s file offset in bytes */
  Bcf32_Half    b_shentsize; /* section header's size in bytes */
  Bcf32_Half    b_shnum;     /* number of entries in section headers table */

  Bcf32_Off     b_rhoff;     /* repository header table’s file offset in bytes */
  Bcf32_Half    b_rhentsize; /* repository header's size in bytes */
  Bcf32_Half    b_rhnum;     /* number of entries in repository headers table */

  Bcf32_Off     b_dtoff;     /* data entries table’s file offset in bytes */
  Bcf32_Half    b_dtentsize; /* data entry's size in bytes */
  Bcf32_Half    b_dtnum;     /* number of entries in data entries table */

  Bcf32_Off     b_stoff;     /* string table’s file offset in bytes */
} __attribute__ ((packed)) Bcf32_fhdr;

/* Type of setcions: */
#define ST_GLOBAL 1  /* this section contains variable entries only */
#define ST_REPOS  2  /* this section contains repository entries only */

#define SMAG_GLOBAL ".global"
#define SMAG_REPOS  ".repos"

typedef struct {
  unsigned char s_name[SI_NIDENT];
  Bcf32_Half    s_type;  /* .global or .repos */
  Bcf32_Off     s_shdr;  /* section header's offset in the string table */
  Bcf32_Off     s_sdata; /* section data/repos's file offset */
  Bcf32_Half    s_dnum;  /* number of data/repos entries in section */
} __attribute__ ((packed)) Bcf32_shdr;

typedef struct {
  Bcf32_Off     r_rhdr;  /* repo header's offset in the string table */
  Bcf32_Off     r_rdata; /* repo data's file offset */
  Bcf32_Half    r_dnum;  /* number of data entries in repo */
} __attribute__ ((packed)) Bcf32_rhdr;

#define DT_NUMERICAL 0x01
#define DT_PATH      0x02
#define DT_STRING    0x04

typedef struct {
  Bcf32_Off     d_name;  /* variable name's offset in the string table */
  union
  {
    Bcf32_Word  d_value;  /* numerical variable's value */
    Bcf32_Off   d_valptr; /* variable value's offset in string table */
  } _v;
  Bcf32_Half    d_type;   /* 0x01 - numerical, 0x02 - path, 0x04 - string */
} __attribute__ ((packed)) Bcf32_dntr;

/************************
  Shared memory (POSIX API):
 */
#define CSVN_SHM_BCF  "/csvn.bcf"
#define CGIT_SHM_BCF  "/cgit.bcf"

#endif  /* __BCF_H */