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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2018-2019. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*
* ----------------------------------------------------------------------
* Purpose : Build and "maintain" a (erlang) term array of
* variable length.
* ----------------------------------------------------------------------
*
*/
/* #ifdef HAVE_CONFIG_H */
/* #include "config.h" */
/* #endif */
#include <stdio.h>
#include <erl_nif.h>
#include "socket_int.h"
#include <sys.h>
#include "socket_util.h"
#include "socket_tarray.h"
/* ----------------------------------------------------------------------
* Types
*/
typedef struct {
Uint32 sz;
Uint32 idx;
ERL_NIF_TERM* array;
} SocketTArrayInt;
/* ----------------------------------------------------------------------
* Forward for internal functions
*/
static void esock_tarray_add1(SocketTArrayInt* taP, ERL_NIF_TERM t);
static void esock_tarray_ensure_fits(SocketTArrayInt* taP, Uint32 needs);
/* ----------------------------------------------------------------------
* API
*/
extern
void* esock_tarray_create(Uint32 sz)
{
SocketTArrayInt* tarrayP;
ESOCK_ASSERT( (sz > 0) );
tarrayP = MALLOC(sizeof(SocketTArrayInt));
ESOCK_ASSERT( (tarrayP != NULL) );
tarrayP->array = MALLOC(sz * sizeof(ERL_NIF_TERM));
ESOCK_ASSERT( (tarrayP->array != NULL) );
tarrayP->sz = sz;
tarrayP->idx = 0;
return ((SocketTArray) tarrayP);
}
extern
void esock_tarray_delete(SocketTArray ta)
{
SocketTArrayInt* taP = (SocketTArrayInt*) ta;
FREE(taP->array);
FREE(taP);
}
extern
Uint32 esock_tarray_sz(SocketTArray a)
{
return ( ((SocketTArrayInt*) a)->idx );
}
extern
void esock_tarray_add(SocketTArray ta, ERL_NIF_TERM t)
{
esock_tarray_add1((SocketTArrayInt*) ta, t);
}
extern
void esock_tarray_tolist(SocketTArray ta,
ErlNifEnv* env,
ERL_NIF_TERM* list)
{
SocketTArrayInt* taP = (SocketTArrayInt*) ta;
*list = MKLA(env, taP->array, taP->idx);
esock_tarray_delete(taP);
}
/* ----------------------------------------------------------------------
* "Internal" functions
*/
static
void esock_tarray_add1(SocketTArrayInt* taP, ERL_NIF_TERM t)
{
esock_tarray_ensure_fits(taP, 1);
taP->array[taP->idx++] = t;
}
static
void esock_tarray_ensure_fits(SocketTArrayInt* taP, Uint32 needs)
{
if (taP->sz < (taP->idx + needs)) {
Uint32 newSz = (needs < taP->sz) ? 2*taP->sz : 2*needs;
void* mem = REALLOC(taP->array, newSz * sizeof(ERL_NIF_TERM));
ESOCK_ASSERT( (mem != NULL) );
taP->sz = newSz;
taP->array = (ERL_NIF_TERM*) mem;
}
}
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