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/* Copyright ©2007-2008 Kris Maglione <fbsdaemon@gmail.com>
* See LICENSE file for license details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ixp_local.h"
enum {
SByte = 1,
SWord = 2,
SDWord = 4,
SQWord = 8,
};
static void
ixp_puint(IxpMsg *msg, uint size, ulong *val) {
uchar *pos;
int v;
if(msg->pos + size <= msg->end) {
pos = (uchar*)msg->pos;
switch(msg->mode) {
case MsgPack:
v = *val;
switch(size) {
case SDWord:
pos[3] = v>>24;
pos[2] = v>>16;
case SWord:
pos[1] = v>>8;
case SByte:
pos[0] = v;
break;
}
case MsgUnpack:
v = 0;
switch(size) {
case SDWord:
v |= pos[3]<<24;
v |= pos[2]<<16;
case SWord:
v |= pos[1]<<8;
case SByte:
v |= pos[0];
break;
}
*val = v;
}
}
msg->pos += size;
}
void
ixp_pu32(IxpMsg *msg, ulong *val) {
ixp_puint(msg, SDWord, val);
}
void
ixp_pu8(IxpMsg *msg, uchar *val) {
ulong v;
v = *val;
ixp_puint(msg, SByte, &v);
*val = (uchar)v;
}
void
ixp_pu16(IxpMsg *msg, ushort *val) {
ulong v;
v = *val;
ixp_puint(msg, SWord, &v);
*val = (ushort)v;
}
void
ixp_pu64(IxpMsg *msg, uvlong *val) {
ulong vl, vb;
vl = (uint)*val;
vb = (uint)(*val>>32);
ixp_puint(msg, SDWord, &vl);
ixp_puint(msg, SDWord, &vb);
*val = vl | ((uvlong)vb<<32);
}
void
ixp_pstring(IxpMsg *msg, char **s) {
ushort len;
if(msg->mode == MsgPack)
len = strlen(*s);
ixp_pu16(msg, &len);
if(msg->pos + len <= msg->end) {
if(msg->mode == MsgUnpack) {
*s = emalloc(len + 1);
memcpy(*s, msg->pos, len);
(*s)[len] = '\0';
}else
memcpy(msg->pos, *s, len);
}
msg->pos += len;
}
void
ixp_pstrings(IxpMsg *msg, ushort *num, char *strings[]) {
char *s;
uint i, size;
ushort len;
ixp_pu16(msg, num);
if(*num > IXP_MAX_WELEM) {
msg->pos = msg->end+1;
return;
}
SET(s);
if(msg->mode == MsgUnpack) {
s = msg->pos;
size = 0;
for(i=0; i < *num; i++) {
ixp_pu16(msg, &len);
msg->pos += len;
size += len;
if(msg->pos > msg->end)
return;
}
msg->pos = s;
size += *num;
s = emalloc(size);
}
for(i=0; i < *num; i++) {
if(msg->mode == MsgPack)
len = strlen(strings[i]);
ixp_pu16(msg, &len);
if(msg->mode == MsgUnpack) {
memcpy(s, msg->pos, len);
strings[i] = (char*)s;
s += len;
msg->pos += len;
*s++ = '\0';
}else
ixp_pdata(msg, &strings[i], len);
}
}
void
ixp_pdata(IxpMsg *msg, char **data, uint len) {
if(msg->pos + len <= msg->end) {
if(msg->mode == MsgUnpack) {
*data = emalloc(len);
memcpy(*data, msg->pos, len);
}else
memcpy(msg->pos, *data, len);
}
msg->pos += len;
}
void
ixp_pqid(IxpMsg *msg, Qid *qid) {
ixp_pu8(msg, &qid->type);
ixp_pu32(msg, &qid->version);
ixp_pu64(msg, &qid->path);
}
void
ixp_pqids(IxpMsg *msg, ushort *num, Qid qid[]) {
int i;
ixp_pu16(msg, num);
if(*num > IXP_MAX_WELEM) {
msg->pos = msg->end+1;
return;
}
for(i = 0; i < *num; i++)
ixp_pqid(msg, &qid[i]);
}
void
ixp_pstat(IxpMsg *msg, Stat *stat) {
ushort size;
if(msg->mode == MsgPack)
size = ixp_sizeof_stat(stat) - 2;
ixp_pu16(msg, &size);
ixp_pu16(msg, &stat->type);
ixp_pu32(msg, &stat->dev);
ixp_pqid(msg, &stat->qid);
ixp_pu32(msg, &stat->mode);
ixp_pu32(msg, &stat->atime);
ixp_pu32(msg, &stat->mtime);
ixp_pu64(msg, &stat->length);
ixp_pstring(msg, &stat->name);
ixp_pstring(msg, &stat->uid);
ixp_pstring(msg, &stat->gid);
ixp_pstring(msg, &stat->muid);
}
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