dir.h

用于汇编领域的,运用于OS的MAIN函数.基于硬件基础的源代码

#ifndef DIR_H
#define DIR_H
// DirEnt, DirBlock class
#define MAX_DIR_ENT 32
#define EXT2_NAME_LEN 255
struct DirEnt{ // directory entry. 16 bytes per entry
   unsigned long ino;      // inode number
   unsigned short rec_len; // directory entry length
   char name_len; // name length
   char file_type;
   char fname[EXT2_NAME_LEN]; // fine name
/*
   long ino; // 4 bytes for inode number
   char fname[MAXFNAME]; // 12 bytes for file name
   */
};
enum { // file type. only low 3 bits are used
   EXT2_FT_UNKNOWN,
   EXT2_FT_REG_FILE,
   EXT2_FT_DIR,
   EXT2_FT_CHRDEV,
   EXT2_FT_BLKDEV,
   EXT2_FT_FIFO,
   EXT2_FT_SOCK,
   EXT2_FT_SYMLINK,
   EXT2_FT_MAX
};
/*
struct DirBlock{ // max 32 entry per dir file
   struct DirEnt entries[MAX_DIR_ENT];
};
*/
struct DirBlock{ // dir block is simply an array of char
   char box[BLKSIZE];
};
#endif