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Annotation of researchv10no/cmd/face/faceproto.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * protocol for talking to the face server
                      3:  * defined as lengths and offsets for machine independence
                      4:  *
                      5:  * multiple byte quantites are stored little endian:
                      6:  * least significant byte in byte 0,
                      7:  * next least in byte 1,
                      8:  * and so on
                      9:  */
                     10: 
                     11: #define        frfshort(p, off)        ((p)[(off)+0]+((p)[(off)+1]<<8))
                     12: #define        frflong(p, off) ((p)[(off)+0]+((p)[(off)+1]<<8)+((p)[(off)+2]<<16)+((p)[(off)+3]<<24))
                     13: #define        tofshort(p, off, n)     ((p)[(off)+0]=n, (p)[(off)+1]=((n)>>8))
                     14: #define        toflong(p, off, n)      ((p)[(off)+0]=n, (p)[(off)+1]=((n)>>8),\
                     15:                                (p)[(off)+2]=((n)>>16), (p)[(off)+3]=((n)>>24))
                     16: 
                     17: #define        F_TYPE  0       /* one byte: message type */
                     18: /* one byte of pad */
                     19: #define        F_LEN   2       /* two bytes: length of accompanying data */
                     20: #define        F_P1    4       /* four bytes: first parameter */
                     21: #define        F_P2    8       /* four bytes: second parameter */
                     22: 
                     23: #define        F_DATA  12      /* associated data, if any */
                     24: 
                     25: /*
                     26:  * type codes
                     27:  */
                     28: #define        DOSTAT  1
                     29: #define        DOREAD  2
                     30: 
                     31: /*
                     32:  * for DOSTAT, associated data returned
                     33:  * is a representation of struct stat
                     34:  * it was first defined on a VAX,
                     35:  * so here, too, integers are little-endian
                     36:  */
                     37: 
                     38: #define        ST_DEV  0       /* (2) */
                     39: #define        ST_INO  2       /* (2) */
                     40: #define        ST_MODE 4       /* (2) */
                     41: #define        ST_NLINK 6      /* (2) */
                     42: #define        ST_UID  8       /* (2) */
                     43: #define        ST_GID  10      /* (2) */
                     44: #define        ST_RDEV 12      /* (2) */
                     45: /* two bytes of padding */
                     46: #define        ST_SIZE 16      /* (4) */
                     47: #define        ST_ATIME 20     /* (4) */
                     48: #define        ST_MTIME 24     /* (4) */
                     49: #define        ST_CTIME 28     /* (4) */
                     50: #define        STLEN   32      /* sizeof(struct stat) */
                     51: 
                     52: #define        STFMT   0170000 /* ST_MODE: type of file */
                     53: #define        STDIR   0040000 /* .. directory */
                     54: 
                     55: #define        FMAXPATH        128     /* max length of pathname */
                     56: #define        FMAXDATA        4096    /* max data read at once */
                     57: 
                     58: #define        FROOT   2       /* i-number of root directory */
                     59: 
                     60: /*
                     61:  * directories
                     62:  */
                     63: #define        FD_INO  0       /* (2 bytes) */
                     64: #define        FD_NAME 2
                     65: #define        FDLEN   16

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