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/*
* file version.c - tools for version data
*
* $Id: version.c,v 1.13 2006/02/10 15:07:17 fzago Exp $
*
* Program XBLAST
* (C) by Oliver Vogel (e-mail: m.vogel@ndh.net)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2; or (at your option)
* any later version
*
* This program is distributed in the hope that it will be entertaining,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILTY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "xblast.h"
/* initial joint version */
static XBVersion jointVersion = { VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH,
};
/* constant versions */
const XBVersion Ver_Local = { VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH };
const XBVersion Ver_None = { 0, 0, 0 };
const XBVersion Ver_2_10_1 = { 2, 10, 1 };
const XBVersion Ver_2_10_2 = { 2, 10, 2 };
/* version table for hosts */
static XBVersion hostVersion[MAX_HOSTS];
/*************************************
* general tools for version structs *
*************************************/
/*
* return temporary string for a version
*/
char *
Version_ToString (const XBVersion * ver)
{
static char tmp[20];
sprintf (tmp, "V%i.%i.%i", ver->major, ver->minor, ver->patch);
return tmp;
} /* Version_ToString */
/*
* clear a version struct
*/
void
Version_Clear (XBVersion * ver)
{
assert (NULL != ver);
memcpy (ver, &Ver_None, sizeof (XBVersion));
} /* Version_Clear */
/*
* check if version is set
*/
XBBool
Version_isDefined (const XBVersion * ver)
{
assert (NULL != ver);
return (memcmp (ver, &Ver_None, sizeof (XBVersion)) != 0);
} /* Version_isDefined */
/*
* compare two versions, return sign of v1-v2
*/
int
Version_Compare (const XBVersion * v1, const XBVersion * v2)
{
assert (NULL != v1);
assert (NULL != v2);
if (v1->major > v2->major) {
return (1);
}
else if (v1->major < v2->major) {
return (-1);
}
if (v1->minor > v2->minor) {
return (1);
}
else if (v1->minor < v2->minor) {
return (-1);
}
if (v1->patch > v2->patch) {
return (1);
}
else if (v1->patch < v2->patch) {
return (-1);
}
return (0);
} /* Version_Compare */
/******************************
* getting local data version *
******************************/
/*
* return local version data as XBVersion
*/
void
Version_Get (XBVerType type, XBVersion * ver)
{
assert (NULL != ver);
switch (type) {
case VERSION_JOINT:
memcpy (ver, &jointVersion, sizeof (XBVersion));
return;
default:
assert (type < MAX_HOSTS);
memcpy (ver, hostVersion + type, sizeof (XBVersion));
return;
}
} /* Version_Get */
/*
* check if joint version is at least given version
*/
XBBool
Version_AtLeast (XBVerType type, const XBVersion * ver)
{
assert (NULL != ver);
switch (type) {
case VERSION_JOINT:
return (Version_Compare (&jointVersion, ver) >= 0);
default:
assert (type < MAX_HOSTS);
return (Version_Compare (hostVersion + type, ver) >= 0);
}
} /* Version_AtLeast */
/***************************
* modifying host version *
***************************/
/*
* reset host versions
*/
void
Version_Reset (void)
{
unsigned char id;
for (id = 0; id < MAX_HOSTS; id++) {
Version_Clear (hostVersion + id);
}
Dbg_Version ("Resetting host version\n");
jointVersion = Ver_Local;
} /* Version_Reset */
/*
* set a host version and modify to joint version, return change
*/
XBBool
Version_Join (unsigned char id, const XBVersion * ver)
{
assert (NULL != ver);
assert (id < MAX_HOSTS);
if (Version_isDefined (ver)) {
Dbg_Version ("Current joint version %s\n", Version_ToString (&jointVersion));
Dbg_Version ("Joining version %s for host #%u\n", Version_ToString (ver), id);
memcpy (hostVersion + id, ver, sizeof (XBVersion));
if (Version_Compare (ver, &jointVersion) < 0) {
jointVersion = *ver;
Dbg_Version ("Updating joint version\n");
return XBTrue;
}
}
else {
Dbg_Version ("Ignoring undefined version for host #%u\n", id);
}
return XBFalse;
} /* Version_Join */
/*
* remove a single host version, return change
*/
XBBool
Version_Remove (unsigned char id)
{
unsigned char h;
assert (id < MAX_HOSTS);
if (Version_isDefined (hostVersion + id)) {
Dbg_Version ("Current joint version %s\n", Version_ToString (&jointVersion));
/* first calculate joint version without the host version to be removed */
memcpy (&jointVersion, &Ver_Local, sizeof (XBVersion));
for (h = 0; h < MAX_HOSTS; h++) {
if (h != id && Version_isDefined (hostVersion + h)
&& Version_Compare (hostVersion + h, &jointVersion) < 0) {
memcpy (&jointVersion, hostVersion + h, sizeof (XBVersion));
}
}
/* now compare with version to be removed, then clear */
if (Version_Compare (&jointVersion, hostVersion + id) > 0) {
Dbg_Version ("removing version for host #%u, joint version update to %s", id,
Version_ToString (&jointVersion));
Version_Clear (hostVersion + id);
return XBTrue;
}
else {
Dbg_Version ("removing version for host #%u\n", id);
Version_Clear (hostVersion + id);
}
}
return XBFalse;
} /* Version_Remove */
/*
* end of file com.c
*/
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