#include	"lib9.h"#include	"fcall.h" staticuchar*pstring(uchar *p, char *s){	uint n; 	if(s == nil){		PBIT16(p, 0);		p += BIT16SZ;		return p;	} 	n = strlen(s);	PBIT16(p, n);	p += BIT16SZ;	memmove(p, s, n);	p += n;	return p;} staticuchar*pqid(uchar *p, Qid *q){	PBIT8(p, q->type);	p += BIT8SZ;	PBIT32(p, q->vers);	p += BIT32SZ;	PBIT64(p, q->path);	p += BIT64SZ;	return p;} staticuintstringsz(char *s){	if(s == nil)		return BIT16SZ; 	return BIT16SZ+strlen(s);} uintsizeS2M(Fcall *f){	uint n;	int i; 	n = 0;	n += BIT32SZ;	/* size */	n += BIT8SZ;	/* type */	n += BIT16SZ;	/* tag */ 	switch(f->type)	{	default:		return 0; 	case Tversion:		n += BIT32SZ;		n += stringsz(f->version);		break; 	case Tflush:		n += BIT16SZ;		break; 	case Tauth:		n += BIT32SZ;		n += stringsz(f->uname);		n += stringsz(f->aname);		break; 	case Tattach:		n += BIT32SZ;		n += BIT32SZ;		n += stringsz(f->uname);		n += stringsz(f->aname);		break; 	case Twalk:		n += BIT32SZ;		n += BIT32SZ;		n += BIT16SZ;		for(i=0; i<f->nwname; i++)			n += stringsz(f->wname[i]);		break; 	case Topen:		n += BIT32SZ;		n += BIT8SZ;		break; 	case Tcreate:		n += BIT32SZ;		n += stringsz(f->name);		n += BIT32SZ;		n += BIT8SZ;		break; 	case Tread:		n += BIT32SZ;		n += BIT64SZ;		n += BIT32SZ;		break; 	case Twrite:		n += BIT32SZ;		n += BIT64SZ;		n += BIT32SZ;		n += f->count;		break; 	case Tclunk:	case Tremove:		n += BIT32SZ;		break; 	case Tstat:		n += BIT32SZ;		break; 	case Twstat:		n += BIT32SZ;		n += BIT16SZ;		n += f->nstat;		break;/* */ 	case Rversion:		n += BIT32SZ;		n += stringsz(f->version);		break; 	case Rerror:		n += stringsz(f->ename);		break; 	case Rflush:		break; 	case Rauth:		n += QIDSZ;		break; 	case Rattach:		n += QIDSZ;		break; 	case Rwalk:		n += BIT16SZ;		n += f->nwqid*QIDSZ;		break; 	case Ropen:	case Rcreate:		n += QIDSZ;		n += BIT32SZ;		break; 	case Rread:		n += BIT32SZ;		n += f->count;		break; 	case Rwrite:		n += BIT32SZ;		break; 	case Rclunk:		break; 	case Rremove:		break; 	case Rstat:		n += BIT16SZ;		n += f->nstat;		break; 	case Rwstat:		break;	}	return n;} uintconvS2M(Fcall *f, uchar *ap, uint nap){	uchar *p;	uint i, size; 	size = sizeS2M(f);	if(size == 0)		return 0;	if(size > nap)		return 0; 	p = (uchar*)ap; 	PBIT32(p, size);	p += BIT32SZ;	PBIT8(p, f->type);	p += BIT8SZ;	PBIT16(p, f->tag);	p += BIT16SZ; 	switch(f->type)	{	default:		return 0; 	case Tversion:		PBIT32(p, f->msize);		p += BIT32SZ;		p = pstring(p, f->version);		break; 	case Tflush:		PBIT16(p, f->oldtag);		p += BIT16SZ;		break; 	case Tauth:		PBIT32(p, f->afid);		p += BIT32SZ;		p  = pstring(p, f->uname);		p  = pstring(p, f->aname);		break; 	case Tattach:		PBIT32(p, f->fid);		p += BIT32SZ;		PBIT32(p, f->afid);		p += BIT32SZ;		p  = pstring(p, f->uname);		p  = pstring(p, f->aname);		break; 	case Twalk:		PBIT32(p, f->fid);		p += BIT32SZ;		PBIT32(p, f->newfid);		p += BIT32SZ;		PBIT16(p, f->nwname);		p += BIT16SZ;		if(f->nwname > MAXWELEM)			return 0;		for(i=0; i<f->nwname; i++)			p = pstring(p, f->wname[i]);		break; 	case Topen:		PBIT32(p, f->fid);		p += BIT32SZ;		PBIT8(p, f->mode);		p += BIT8SZ;		break; 	case Tcreate:		PBIT32(p, f->fid);		p += BIT32SZ;		p = pstring(p, f->name);		PBIT32(p, f->perm);		p += BIT32SZ;		PBIT8(p, f->mode);		p += BIT8SZ;		break; 	case Tread:		PBIT32(p, f->fid);		p += BIT32SZ;		PBIT64(p, f->offset);		p += BIT64SZ;		PBIT32(p, f->count);		p += BIT32SZ;		break; 	case Twrite:		PBIT32(p, f->fid);		p += BIT32SZ;		PBIT64(p, f->offset);		p += BIT64SZ;		PBIT32(p, f->count);		p += BIT32SZ;		memmove(p, f->data, f->count);		p += f->count;		break; 	case Tclunk:	case Tremove:		PBIT32(p, f->fid);		p += BIT32SZ;		break; 	case Tstat:		PBIT32(p, f->fid);		p += BIT32SZ;		break; 	case Twstat:		PBIT32(p, f->fid);		p += BIT32SZ;		PBIT16(p, f->nstat);		p += BIT16SZ;		memmove(p, f->stat, f->nstat);		p += f->nstat;		break;/* */ 	case Rversion:		PBIT32(p, f->msize);		p += BIT32SZ;		p = pstring(p, f->version);		break; 	case Rerror:		p = pstring(p, f->ename);		break; 	case Rflush:		break; 	case Rauth:		p = pqid(p, &f->aqid);		break; 	case Rattach:		p = pqid(p, &f->qid);		break; 	case Rwalk:		PBIT16(p, f->nwqid);		p += BIT16SZ;		if(f->nwqid > MAXWELEM)			return 0;		for(i=0; i<f->nwqid; i++)			p = pqid(p, &f->wqid[i]);		break; 	case Ropen:	case Rcreate:		p = pqid(p, &f->qid);		PBIT32(p, f->iounit);		p += BIT32SZ;		break; 	case Rread:		PBIT32(p, f->count);		p += BIT32SZ;		memmove(p, f->data, f->count);		p += f->count;		break; 	case Rwrite:		PBIT32(p, f->count);		p += BIT32SZ;		break; 	case Rclunk:		break; 	case Rremove:		break; 	case Rstat:		PBIT16(p, f->nstat);		p += BIT16SZ;		memmove(p, f->stat, f->nstat);		p += f->nstat;		break; 	case Rwstat:		break;	}	if(size != p-ap)		return 0;	return size;}