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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <grass/G3d.h>
#include "G3d_intern.h"
/*---------------------------------------------------------------------------*/
#ifndef GRASS_G3D_H
typedef struct
{
int nofNames;
int *index;
char *active;
int lastName;
int lastIndex;
int lastIndexActive;
} G3d_cache_hash;
#endif
/*---------------------------------------------------------------------------*/
void G3d_cache_hash_reset(G3d_cache_hash * h)
{
int i;
for (i = 0; i < h->nofNames; i++)
h->active[i] = 0;
h->lastIndexActive = 0;
}
/*---------------------------------------------------------------------------*/
void G3d_cache_hash_dispose(G3d_cache_hash * h)
{
if (h == NULL)
return;
if (h->index != NULL)
G3d_free(h->index);
if (h->active != NULL)
G3d_free(h->active);
G3d_free(h);
}
/*---------------------------------------------------------------------------*/
void *G3d_cache_hash_new(int nofNames)
{
G3d_cache_hash *tmp;
tmp = G3d_malloc(sizeof(G3d_cache_hash));
if (tmp == NULL) {
G3d_error("G3d_cache_hash_new: error in G3d_malloc");
return (void *)NULL;
}
tmp->nofNames = nofNames;
tmp->index = G3d_malloc(sizeof(int) * tmp->nofNames);
tmp->active = G3d_malloc(sizeof(char) * tmp->nofNames);
if ((tmp->index == NULL) || (tmp->active == NULL)) {
G3d_cache_hash_dispose(tmp);
G3d_error("G3d_cache_hash_new: error in G3d_malloc");
return (void *)NULL;
}
G3d_cache_hash_reset(tmp);
return tmp;
}
/*---------------------------------------------------------------------------*/
void G3d_cache_hash_remove_name(G3d_cache_hash * h, int name)
{
if (name >= h->nofNames)
G3d_fatalError("G3d_cache_hash_remove_name: name out of range");
if (h->active[name] == 0)
G3d_fatalError("G3d_cache_hash_remove_name: name not in hashtable");
h->active[name] = 0;
if (name == h->lastName)
h->lastIndexActive = 0;
}
/*---------------------------------------------------------------------------*/
void G3d_cache_hash_load_name(G3d_cache_hash * h, int name, int index)
{
if (name >= h->nofNames)
G3d_fatalError("G3d_cache_hash_load_name: name out of range");
if (h->active[name] != 0)
G3d_fatalError("G3d_cache_hash_load_name: name already in hashtable");
h->index[name] = index;
h->active[name] = 1;
}
/*---------------------------------------------------------------------------*/
int G3d_cache_hash_name2index(G3d_cache_hash * h, int name)
{
int index;
if (h->lastIndexActive)
if (h->lastName == name)
return h->lastIndex;
if (!h->active[name])
return -1;
index = h->index[name];
h->lastName = name;
h->lastIndex = index;
h->lastIndexActive = 1;
return index;
}
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