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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <grass/raster3d.h>
#include "raster3d_intern.h"
/*---------------------------------------------------------------------------*/
#ifndef GRASS_RASTER3D_H
typedef struct {
int nofNames;
int *index;
char *active;
int lastName;
int lastIndex;
int lastIndexActive;
} Rast3d_cache_hash;
#endif
/*---------------------------------------------------------------------------*/
void Rast3d_cache_hash_reset(Rast3d_cache_hash *h)
{
int i;
for (i = 0; i < h->nofNames; i++)
h->active[i] = 0;
h->lastIndexActive = 0;
}
/*---------------------------------------------------------------------------*/
void Rast3d_cache_hash_dispose(Rast3d_cache_hash *h)
{
if (h == NULL)
return;
if (h->index != NULL)
Rast3d_free(h->index);
if (h->active != NULL)
Rast3d_free(h->active);
Rast3d_free(h);
}
/*---------------------------------------------------------------------------*/
void *Rast3d_cache_hash_new(int nofNames)
{
Rast3d_cache_hash *tmp;
tmp = (Rast3d_cache_hash *)Rast3d_malloc(sizeof(Rast3d_cache_hash));
if (tmp == NULL) {
Rast3d_error("Rast3d_cache_hash_new: error in Rast3d_malloc");
return (void *)NULL;
}
tmp->nofNames = nofNames;
tmp->index = (int *)Rast3d_malloc(tmp->nofNames * sizeof(int));
tmp->active = (char *)Rast3d_malloc(tmp->nofNames * sizeof(char));
if ((tmp->index == NULL) || (tmp->active == NULL)) {
Rast3d_cache_hash_dispose(tmp);
Rast3d_error("Rast3d_cache_hash_new: error in Rast3d_malloc");
return (void *)NULL;
}
Rast3d_cache_hash_reset(tmp);
return tmp;
}
/*---------------------------------------------------------------------------*/
void Rast3d_cache_hash_remove_name(Rast3d_cache_hash *h, int name)
{
if (name >= h->nofNames)
Rast3d_fatal_error(
"Rast3d_cache_hash_remove_name: name %i out of range", name);
if (h->active[name] == 0)
Rast3d_fatal_error(
"Rast3d_cache_hash_remove_name: name %i not in hashtable", name);
h->active[name] = 0;
if (name == h->lastName)
h->lastIndexActive = 0;
}
/*---------------------------------------------------------------------------*/
void Rast3d_cache_hash_load_name(Rast3d_cache_hash *h, int name, int index)
{
if (name >= h->nofNames)
Rast3d_fatal_error("Rast3d_cache_hash_load_name: name out of range");
if (h->active[name] != 0)
Rast3d_fatal_error(
"Rast3d_cache_hash_load_name: name already in hashtable");
h->index[name] = index;
h->active[name] = 1;
}
/*---------------------------------------------------------------------------*/
int Rast3d_cache_hash_name2index(Rast3d_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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