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/*
qureje is a database managment tool.
Copyright (C) 2021 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <libpq-fe.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "database.h"
char *qureje_parse_arguments(int, char **, qureje_conn *);
char *qureje_param(char *, char *);
int main(int argc, char** argv)
{
qureje_conn *conn = qureje_conn_create_from_arguments(argc, argv);
PGconn *conn1;
/*PGresult *res;*/
/*int rowcount, colcount, i, j, firstcol;*/
char *conninfo = qureje_parse_arguments(argc, argv, conn);
printf("%s\n", conn->type);
/* parameter type should be guessed by PostgreSQL */
/*const Oid paramTypes[1] = { 0 };*/
/* parameter value */
/*const char * const paramValues[1] = { "pg_database" };*/
/*
* Using an empty connectstring will use default values for everything.
* If set, the environment variables PGHOST, PGDATABASE, PGPORT and
* PGUSER will be used.
*/
conn1 = PQconnectdb(conninfo);
/*
* This can only happen if there is not enough memory
* to allocate the PGconn structure.
*/
if (conn1 == NULL) {
fprintf(stderr, "Out of memory connecting to PostgreSQL.\n");
return 1;
}
/* check if the connection attempt worked */
if (PQstatus(conn1) != CONNECTION_OK) {
fprintf(stderr, "%s\n", PQerrorMessage(conn1));
/*
* Even if the connection failed, the PGconn structure has been
* allocated and must be freed.
*/
PQfinish(conn1);
return 1;
}
printf("Hello, World!\n");
return 0;
}
char *
qureje_parse_arguments(int argc, char **argv, qureje_conn *conn)
{
int i = 1, totsize = 0, paramc = 0, verbose = 0;
char *conninfo;
char **paramv;
if (argc <= 1) {
return "";
}
paramv = (char **) malloc(sizeof (char **) * argc);
if (strcmp ("-t", argv[i]) == 0 && i < argc) {
conn->type = argv[++i];
}
if (conn->type == NULL) {
puts("You must specify the database driver.");
exit(1);
return NULL;
}
while (i < argc) {
/* these are all options with a value */
if (strcmp ("-h", argv[i]) == 0) {
paramv[paramc++] = qureje_param("host", argv[++i]);
} else if (strcmp ("-U", argv[i]) == 0) {
paramv[paramc++] = qureje_param("user", argv[++i]);
} else if (strcmp ("-v", argv[i]) == 0) {
verbose = 1;
}
++i;
}
for (i = 0; i < paramc; i++) {
totsize += strlen(paramv[i]);
if (i < paramc) totsize ++;
}
conninfo = (char *) malloc(sizeof (char *) * totsize);
memset (conninfo, '\0', totsize);
for (i = 0; i < paramc; i++) {
strcat(conninfo, paramv[i]);
if (i < argc - 1) strcat(conninfo, " ");
}
if (verbose == 1) {
printf("connection info:\n%s\n", conninfo);
}
return conninfo;
}
char *
qureje_param(char *parname, char *src)
{
/* the src's legth + the paraname length + '=' + '\0' */
int strc = strlen(src) + strlen(parname) + 2;
char *param = (char *) malloc(sizeof (char) * strc);
memset(param, '\0', strc);
strcat(param, parname);
strcat(param, "=");
strcat(param, src);
return param;
}
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