#include <config.h>

#if STDC_HEADERS
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#endif
#include <sys/types.h>
#include <stdio.h>
#if TIME_WITH_SYS_TIME
# ifdef WIN32
#  include <sys/timeb.h>
# else
#  include <sys/time.h>
# endif
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#if HAVE_WINSOCK_H
#include <winsock.h>
#endif

#include "asn1.h"
#include "view.h"



static struct viewEntry *List = NULL, *ScanPtr = NULL;


struct viewEntry *
view_getEntry(int viewIndex, 
	      oid *viewSubtree,	      
	      int viewSubtreeLen)
{
    struct viewEntry *vp;

    for(vp = List; vp; vp = vp->next){
        if (viewIndex == vp->viewIndex
	    && viewSubtreeLen == vp->viewSubtreeLen
	    && !memcmp((char *)vp->viewSubtree, (char *)viewSubtree,
		     viewSubtreeLen * sizeof(oid)))
	  return vp;
    }
    return NULL;
}

void
view_scanInit(void)
{
    ScanPtr = List;
}

struct viewEntry *
view_scanNext(void)
{
    struct viewEntry *returnval = ScanPtr;
    if (ScanPtr) ScanPtr = ScanPtr->next;
    return returnval;
}

struct viewEntry *
view_createEntry(int viewIndex, 
		 oid *viewSubtree,
		 int viewSubtreeLen)
{
    struct viewEntry *vp;

    vp = (struct viewEntry *)malloc(sizeof(struct viewEntry));
    memset(vp, 0, sizeof(struct viewEntry));

    vp->viewIndex = viewIndex;
    memcpy(vp->viewSubtree, viewSubtree, viewSubtreeLen * sizeof(oid));
    vp->viewSubtreeLen = viewSubtreeLen;
    vp->reserved = (struct viewEntry *)malloc(sizeof(struct viewEntry));
    memset(vp->reserved, 0, sizeof(struct viewEntry));

    vp->next = List;
    List = vp;
    return vp;
}

void
view_destroyEntry(int viewIndex,
		  oid *viewSubtree,		  
		  int viewSubtreeLen)
{
    struct viewEntry *vp, *lastvp = NULL;

    if (List && List->viewIndex == viewIndex
	&& List->viewSubtreeLen == viewSubtreeLen
	&& !memcmp((char *)List->viewSubtree, (char *)viewSubtree,
		 viewSubtreeLen * sizeof(oid))){
	vp = List;
	List = List->next;
    } else {
	for(vp = List; vp; vp = vp->next){
	    if (vp->viewIndex == viewIndex
		&& vp->viewSubtreeLen  == viewSubtreeLen 
		&& !memcmp((char *)vp->viewSubtree, (char *)viewSubtree,
			 viewSubtreeLen * sizeof(oid)))
		break;
	    lastvp = vp;
	}
	if (!vp)
	    return;
	lastvp->next = vp->next;
    }
    if (vp->reserved)
	free((char *)vp->reserved);
    free(vp);
    return;
}