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/*
* DIS/x : An implementation of the IEEE 1278.1 protocol
*
* Copyright (C) 1996-1998, Riley Rainey (rrainey@ix.netcom.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of either:
*
* a) the GNU Library General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your
* option) any later version. A description of the terms and conditions
* of the GLPL may be found in the "COPYING.LIB" file.
*
* b) the "Artistic License" which comes with this Kit. Information
* about this license may be found in the "Artistic" file.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License or the Artistic License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Information describing how to contact the author can be found in the
* README file.
*/
#include <dis/dis.h>
#include <string.h>
#include <stdlib.h>
#define DMAX 16 /* maximum number of delimiter chars */
#define BMAX 64 /* maximum incoming string length */
/*
* Generate a DIS entity ID from a string
*
* C-style hexidecimal numbers may be used in the input stream:
*
* 1/1/0xfffe, and 0xff/0xff/0x1 are both valid
*
* Example invalid strings:
*
* 1/1/1,000 Entity ID field contains an invalid character
* 1/1/1000000 Entity ID field > 0xffff
*
* Return values:
*
* 0 success
* 1 parse error
* 2 incoming string buffer too large; (max is 64 characters)
* 3 one or more of the fields contains an invalid value (<0 or >0xffff)
* 4 invalid character in string
*/
int
DISParseEntityID (dis_entity_id *p,
const char * buf,
int bufsize,
const char *delim)
{
char pdelim[DMAX+1];
char tbuf[BMAX+1];
char *cur, *next, *endptr;
long rval;
int result = 1;
memset ( p, 0, sizeof(dis_entity_id));
/*
* Buffer too large?
*/
if (bufsize > BMAX ) {
return 2;
}
strncpy ( tbuf, buf, BMAX );
tbuf[BMAX] = '\0';
if (delim) {
strncpy(pdelim, delim, DMAX);
pdelim[DMAX] = '\0';
}
else {
strcpy( pdelim, ":./" );
}
cur = tbuf;
next = strpbrk ( cur, pdelim );
if ( next != NULL ) {
/*
* Once we get a delimiter, all other delimeters must match
*/
pdelim[0] = *next;
pdelim[1] = '\0';
/*
* Get Site ID
*/
endptr = next;
rval = strtol ( cur, &endptr, 0 );
if (rval < 0 || rval > 0xffff) {
return 3;
}
else {
p->sim_id.site_id = (unsigned short) rval;
}
/*
* Ensure strtol stopped parsing at the correct spot
*/
if ( endptr != next ) {
return 4;
}
cur = next+1;
next = strpbrk ( cur, pdelim );
if ( next != NULL ) {
/*
* Get application ID
*/
endptr = next;
rval = strtol ( cur, &endptr, 0 );
if (rval < 0 || rval > 0xffff) {
return 3;
}
else {
p->sim_id.application_id = (unsigned short) rval;
}
/*
* Ensure strtol stopped parsing at the correct spot
*/
if ( endptr != next ) {
return 4;
}
/*
* Get Entity ID
*/
cur = next+1;
rval = strtol ( cur, NULL, 0 );
if (rval < 0 || rval > 0xffff) {
return 3;
}
else {
p->entity_id = (unsigned short) rval;
}
result = 0;
}
}
return result;
}
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