libfdcore/apps.c

/*********************************************************************************************************
* Software License Agreement (BSD License)                                                               *
* Author: Sebastien Decugis <sdecugis@freediameter.net>							 *
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#include "fdcore-internal.h"

/* Merge information into a list of apps */
int fd_app_merge(struct fd_list * list, application_id_t aid, vendor_id_t vid, int auth, int acct)
{
	struct fd_list * li;
	int skip = 0;
	
	/* List is ordered by appid. Avoid duplicates */
	for (li = list; li->next != list; li = li->next) {
		struct fd_app * na = (struct fd_app *)(li->next);
		if (na->appid < aid)
			continue;
		
		if (na->appid > aid)
			break;
		
		/* Otherwise, we merge with existing entry -- ignore vendor id in this case */
		skip = 1;
		
		if (auth)
			na->flags.auth = 1;
		if (acct)
			na->flags.acct = 1;
		break;
	}
	
	if (!skip) {			
		struct fd_app  * new = NULL;

		CHECK_MALLOC( new = malloc(sizeof(struct fd_app)) );
		memset(new, 0, sizeof(struct fd_app));
		fd_list_init(&new->chain, NULL);
		new->flags.auth = (auth ? 1 : 0);
		new->flags.acct = (acct ? 1 : 0);
		new->vndid = vid;
		new->appid = aid;
		fd_list_insert_after(li, &new->chain);
	}
	
	return 0;
}

/* Check if a given application id is in a list */
int fd_app_check(struct fd_list * list, application_id_t aid, struct fd_app **detail)
{
	struct fd_list * li;
	
	TRACE_ENTRY("%p %d %p", list, aid, detail);
	CHECK_PARAMS(list && detail);
	
	*detail = NULL;
	
	/* Search in the list */
	for (li = list->next; li != list; li = li->next) {
		struct fd_app * a = (struct fd_app *)li;
		if (a->appid < aid)
			continue;
		
		if (a->appid == aid)
			*detail = a;
		break;
	}
	
	return 0;
}

/* Check if two lists have at least one common application */
int fd_app_check_common(struct fd_list * list1, struct fd_list * list2, int * common_found)
{
	struct fd_list * li1, *li2;
	
	TRACE_ENTRY("%p %p %p", list1, list2, common_found);
	CHECK_PARAMS( list1 && list2 && common_found );
	
	/* Both lists are ordered, so advance both pointers at the same time */
	for (li1 = list1->next, li2 = list2->next;  (li1 != list1) && (li2 != list2); ) {
		struct fd_app * a1 = (struct fd_app *)li1, *a2 = (struct fd_app *)li2;
		if (a1->appid < a2->appid) {
			li1 = li1->next;
			continue;
		}
		if (a1->appid > a2->appid) {
			li2 = li2->next;
			continue;
		}
		/* They are equal, compare the applications */
		if ((a1->flags.auth && a2->flags.auth) || (a1->flags.acct && a2->flags.acct)) {
			/* found! */
			*common_found = 1;
			return 0;
		}
		
		/* This application is not common, advance both lists */
		li1 = li1->next;
		li2 = li2->next;
	}
	
	/* We did not find a common app */
	*common_found = 0;
	return 0;
}

/* Remove the apps from a list */
int fd_app_empty(struct fd_list * list)
{
	TRACE_ENTRY("%p", list);
	CHECK_PARAMS( list );
	
	while (!FD_IS_LIST_EMPTY(list)) {
		struct fd_list * li = list->next;
		fd_list_unlink(li);
		free(li);
	}
	
	return 0;
}