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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2004-2019 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_PGSQL
#include <mailutils/mailutils.h>
#include <mailutils/sql.h>
#include <mailutils/cctype.h>
#include <libpq-fe.h>
static char *
chop (char *str)
{
int len;
if (!str)
return NULL;
for (len = strlen (str); len > 0 && mu_isspace (str[len-1]); len--)
;
str[len] = 0;
return str;
}
struct mu_pgsql_data
{
PGconn *pgconn;
PGresult *res;
};
static int
postgres_init (mu_sql_connection_t conn)
{
struct mu_pgsql_data *dp = calloc (1, sizeof (*dp));
if (!dp)
return ENOMEM;
conn->data = dp;
return 0;
}
static int
postgres_destroy (mu_sql_connection_t conn)
{
struct mu_pgsql_data *dp = conn->data;
free (dp);
conn->data = NULL;
return 0;
}
static int
postgres_connect (mu_sql_connection_t conn)
{
struct mu_pgsql_data *dp = conn->data;
char portbuf[16];
char *portstr;
if (conn->port == 0)
portstr = NULL;
else
{
portstr = portbuf;
snprintf (portbuf, sizeof (portbuf), "%d", conn->port);
}
dp->pgconn = PQsetdbLogin (conn->server, portstr, NULL, NULL,
conn->dbname, conn->login, conn->password);
if (PQstatus (dp->pgconn) == CONNECTION_BAD)
return MU_ERR_SQL;
return 0;
}
static int
postgres_disconnect (mu_sql_connection_t conn)
{
struct mu_pgsql_data *dp = conn->data;
PQfinish (dp->pgconn);
return 0;
}
static int
postgres_query (mu_sql_connection_t conn, char *query)
{
struct mu_pgsql_data *dp = conn->data;
ExecStatusType stat;
dp->res = PQexec (dp->pgconn, query);
if (dp->res == NULL)
return MU_ERR_SQL;
stat = PQresultStatus (dp->res);
if (stat != PGRES_COMMAND_OK && stat != PGRES_TUPLES_OK)
return MU_ERR_SQL;
return 0;
}
static int
postgres_store_result (mu_sql_connection_t conn)
{
return 0;
}
static int
postgres_release_result (mu_sql_connection_t conn)
{
struct mu_pgsql_data *dp = conn->data;
PQclear (dp->res);
dp->res = NULL;
return 0;
}
static int
postgres_num_columns (mu_sql_connection_t conn, size_t *np)
{
struct mu_pgsql_data *dp = conn->data;
if (!dp->res)
return MU_ERR_NO_RESULT;
*np = PQnfields (dp->res);
return 0;
}
static int
postgres_num_tuples (mu_sql_connection_t conn, size_t *np)
{
struct mu_pgsql_data *dp = conn->data;
if (!dp->res)
return MU_ERR_NO_RESULT;
*np = PQntuples (dp->res);
return 0;
}
static int
postgres_get_column (mu_sql_connection_t conn, size_t nrow, size_t ncol,
char **pdata)
{
struct mu_pgsql_data *dp = conn->data;
if (!dp->res)
return MU_ERR_NO_RESULT;
*pdata = chop (PQgetvalue (dp->res, nrow, ncol));
return 0;
}
static int
postgres_get_field_number (mu_sql_connection_t conn, const char *fname,
size_t *fno)
{
struct mu_pgsql_data *dp = conn->data;
if (!dp->res)
return MU_ERR_NO_RESULT;
if ((*fno = PQfnumber (dp->res, fname)) == -1)
return MU_ERR_NOENT;
return 0;
}
static const char *
postgres_errstr (mu_sql_connection_t conn)
{
struct mu_pgsql_data *dp = conn->data;
return PQerrorMessage (dp->pgconn);
}
MU_DECL_SQL_DISPATCH_T(postgres) = {
"postgres",
5432,
postgres_init,
postgres_destroy,
postgres_connect,
postgres_disconnect,
postgres_query,
postgres_store_result,
postgres_release_result,
postgres_num_tuples,
postgres_num_columns,
postgres_get_column,
postgres_get_field_number,
postgres_errstr,
};
#endif
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