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	fcall.h - 9base - revived minimalist port of Plan 9 userland to Unix
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	---
	fcall.h (3517B)
	---
	1 #ifndef _FCALL_H_
	2 #define _FCALL_H_ 1
	3 #ifdef __cplusplus
	4 extern "C" {
	5 #endif
	6 /*
	7 #pragma src "/sys/src/libc/9sys"
	8 #pragma lib "libc.a"
	9 */
	10
	11 #define VERSION9P "9P2000"
	12 #define MAXWELEM 16
	13
	14 typedef
	15 struct Fcall
	16 {
	17 uchar type;
	18 u32int fid;
	19 ushort tag;
	20 u32int msize; /* Tversion, Rversion */
	21 char version; / Tversion, Rversion */
	22 ushort oldtag; /* Tflush */
	23 char ename; / Rerror */
	24 Qid qid; /* Rattach, Ropen, Rcreate */
	25 u32int iounit; /* Ropen, Rcreate */
	26 Qid aqid; /* Rauth */
	27 u32int afid; /* Tauth, Tattach */
	28 char uname; / Tauth, Tattach */
	29 char aname; / Tauth, Tattach */
	30 u32int perm; /* Tcreate */
	31 char name; / Tcreate */
	32 uchar mode; /* Tcreate, Topen */
	33 u32int newfid; /* Twalk */
	34 ushort nwname; /* Twalk */
	35 char wname[MAXWELEM]; / Twalk */
	36 ushort nwqid; /* Rwalk */
	37 Qid wqid[MAXWELEM]; /* Rwalk */
	38 vlong offset; /* Tread, Twrite */
	39 u32int count; /* Tread, Twrite, Rread */
	40 char data; / Twrite, Rread */
	41 ushort nstat; /* Twstat, Rstat */
	42 uchar stat; / Twstat, Rstat */
	43 int unixfd; /* Ropenfd */
	44
	45 /* 9P2000.u extensions */
	46 int errornum; /* Rerror */
	47 int uidnum; /* Tattach, Tauth */
	48 char extension; / Tcreate */
	49 } Fcall;
	50
	51
	52 #define GBIT8(p) ((p)[0])
	53 #define GBIT16(p) ((p)[0]\|((p)[1]<<8))
	54 #define GBIT32(p) ((u32int)((p)[0]\|((p)[1]<<8)\|((p)[2]<<16…
	55 #define GBIT64(p) ((u32int)((p)[0]\|((p)[1]<<8)\|((p)[2]<<16…
	56 ((vlong)((p)[4]\|((p)[5]<<8)\|((p)[6]<<16)…
	57
	58 #define PBIT8(p,v) (p)[0]=(v)
	59 #define PBIT16(p,v) (p)[0]=(v);(p)[1]=(v)>>8
	60 #define PBIT32(p,v) (p)[0]=(v);(p)[1]=(v)>>8;(p)[2]=(v)>>1…
	61 #define PBIT64(p,v) (p)[0]=(v);(p)[1]=(v)>>8;(p)[2]=(v)>>1…
	62 (p)[4]=(v)>>32;(p)[5]=(v)>>40;(p)[6]=(v)>>48;(p)…
	63
	64 #define BIT8SZ 1
	65 #define BIT16SZ 2
	66 #define BIT32SZ 4
	67 #define BIT64SZ 8
	68 #define QIDSZ (BIT8SZ+BIT32SZ+BIT64SZ)
	69
	70 /* STATFIXLEN includes leading 16-bit count */
	71 /* The count, however, excludes itself; total size is BIT16SZ+count */
	72 #define STATFIXLEN (BIT16SZ+QIDSZ+5BIT16SZ+4BIT32SZ+1*BIT64SZ) …
	73 #define STATFIXLENU (STATFIXLEN+BIT16SZ+3BIT32SZ) / for …
	74
	75 #define NOTAG (ushort)~0U /* Dummy tag */
	76 #define NOFID (u32int)~0U /* Dummy fid */
	77 #define NOUID (-1) /* Dummy uid */
	78 #define IOHDRSZ 24 /* ample room for Twrite…
	79
	80 enum
	81 {
	82 Tversion = 100,
	83 Rversion,
	84 Tauth = 102,
	85 Rauth,
	86 Tattach = 104,
	87 Rattach,
	88 Terror = 106, /* illegal */
	89 Rerror,
	90 Tflush = 108,
	91 Rflush,
	92 Twalk = 110,
	93 Rwalk,
	94 Topen = 112,
	95 Ropen,
	96 Tcreate = 114,
	97 Rcreate,
	98 Tread = 116,
	99 Rread,
	100 Twrite = 118,
	101 Rwrite,
	102 Tclunk = 120,
	103 Rclunk,
	104 Tremove = 122,
	105 Rremove,
	106 Tstat = 124,
	107 Rstat,
	108 Twstat = 126,
	109 Rwstat,
	110 Tmax,
	111
	112 Topenfd = 98,
	113 Ropenfd
	114 };
	115
	116 uint convM2S(uchar, uint, Fcall);
	117 uint convS2M(Fcall, uchar, uint);
	118 uint sizeS2M(Fcall*);
	119
	120 int statcheck(uchar *abuf, uint nbuf);
	121 uint convM2D(uchar, uint, Dir, char*);
	122 uint convD2M(Dir, uchar, uint);
	123 uint sizeD2M(Dir*);
	124
	125 uint convM2Su(uchar, uint, Fcall, int);
	126 uint convS2Mu(Fcall, uchar, uint, int);
	127 uint sizeS2Mu(Fcall*, int);
	128
	129 int statchecku(uchar *abuf, uint nbuf, int);
	130 uint convM2Du(uchar, uint, Dir, char*, int);
	131 uint convD2Mu(Dir, uchar, uint, int);
	132 uint sizeD2Mu(Dir*, int);
	133
	134 int fcallfmt(Fmt*);
	135 int dirfmt(Fmt*);
	136 int dirmodefmt(Fmt*);
	137
	138 int read9pmsg(int, void*, uint);
	139
	140 /*
	141 #pragma varargck type "F" Fcall*
	142 #pragma varargck type "M" ulong
	143 #pragma varargck type "D" Dir*
	144 */
	145
	146 #ifdef __cplusplus
	147 }
	148 #endif
	149 #endif