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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2006-2016. 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%
*/
#include <erl_driver.h>
#include <libpq-fe.h>
#include <ei.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "pg_encode2.h"
void encode_ok(ei_x_buff* x)
{
const char* k_ok = "ok";
ei_x_encode_atom(x, k_ok);
}
void encode_error(ei_x_buff* x, PGconn* conn)
{
const char* k_error = "error";
ei_x_encode_tuple_header(x, 2);
ei_x_encode_atom(x, k_error);
ei_x_encode_string(x, PQerrorMessage(conn));
}
void encode_result(ei_x_buff* x, PGresult* res, PGconn* conn)
{
int row, n_rows, col, n_cols, fsize;
switch (PQresultStatus(res)) {
case PGRES_TUPLES_OK:
n_rows = PQntuples(res);
n_cols = PQnfields(res);
ei_x_encode_tuple_header(x, 2);
encode_ok(x);
ei_x_encode_list_header(x, 1);
for (col = 0; col < n_cols; ++col) {
ei_x_encode_list_header(x, 1);
ei_x_encode_string(x, PQfname(res, col));
}
ei_x_encode_empty_list(x);
for (row = 0; row < n_rows; ++row) {
ei_x_encode_list_header(x, 1);
for (col = 0; col < n_cols; ++col) {
ei_x_encode_list_header(x, 1);
fsize = PQgetlength(res, row, col);
ei_x_encode_binary(x, PQgetvalue(res, row, col), fsize);
}
ei_x_encode_empty_list(x);
}
ei_x_encode_empty_list(x);
break;
case PGRES_COMMAND_OK:
ei_x_encode_tuple_header(x, 2);
encode_ok(x);
ei_x_encode_string(x, PQcmdTuples(res));
break;
default:
encode_error(x, conn);
break;
}
}
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