forked from philwieland/openrail
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db.c
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db.c
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/*
Copyright (C) 2013 Phil Wieland
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 <http://www.gnu.org/licenses/>.
phil@philwieland.com
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "misc.h"
#include "db.h"
#include "stomp.h"
#include "jsmn.h"
static MYSQL * mysql_object;
static char server[256], user[256], password[256], database[256];
word db_init(const char * const s, const char * const u, const char * const p, const char * const d)
{
if(strlen(s) > 250) return 1;
if(strlen(u) > 250) return 1;
if(strlen(p) > 250) return 1;
if(strlen(d) > 250) return 1;
strcpy(server, s);
strcpy(user, u);
strcpy(password, p);
strcpy(database, d);
mysql_object = 0;
return 0;
}
word db_query(const char * const query)
{
char zs[2048];
if(strlen(query) > 2000)
{
_log(MAJOR, "db_query() called with overlong query.");
return 99;
}
sprintf(zs, "db_query(\"%s\")", query);
_log(PROC, zs);
if(db_connect()) return 9;
if(mysql_query(mysql_object, query))
{
sprintf(zs, "db_query(): mysql_query() Error %u: %s Query:", mysql_errno(mysql_object), mysql_error(mysql_object));
_log(CRITICAL, zs);
char report[128];
strncpy(report, query, 96);
report[96] = 0;
if(strlen(query) > 96)
{
strcat(report, "...");
}
sprintf(zs,"\"%s\"", report);
_log(CRITICAL, zs);
db_disconnect();
return 3;
}
return 0;
}
MYSQL_RES * db_store_result(void)
{
if(mysql_object) return mysql_store_result(mysql_object);
return NULL;
}
word db_row_count(void)
{
// Returns number of rows affected by preceding DELETE or UPDATE.
// Doesn't work after a SELECT.
MYSQL_RES * result;
MYSQL_ROW row;
if(db_connect()) return 9;
if (mysql_query(mysql_object, "SELECT row_count()"))
{
char zs[1024];
sprintf(zs, "db_row_count(): mysql_query() Error %u: %s", mysql_errno(mysql_object), mysql_error(mysql_object));
_log(CRITICAL, zs);
db_disconnect();
return 3;
}
result = mysql_store_result(mysql_object);
row = mysql_fetch_row(result);
mysql_free_result(result);
return atoi(row[0]);
}
word db_connect(void)
{
_log(PROC, "db_connect()");
if(!mysql_object)
{
_log(DEBUG, " Connecting to database.");
mysql_object = mysql_init(NULL);
if(mysql_object == NULL)
{
_log(CRITICAL, "db_connect() error 1: mysql_init() returned NULL");
return 1;
}
if(mysql_real_connect(mysql_object, server, user, password, database, 0, NULL, 0) == NULL)
{
char zs[1024];
sprintf(zs, "db_connect() error 2: Connect failed: Error %u: %s", mysql_errno(mysql_object), mysql_error(mysql_object));
_log(CRITICAL, zs);
db_disconnect();
return 2;
}
// Disable auto-reconnect
my_bool reconnect = 0;
mysql_options(mysql_object, MYSQL_OPT_RECONNECT, &reconnect);
{
char zs[128];
sprintf(zs, "Connection to database \"%s\" opened.", database);
_log(GENERAL, zs);
}
}
return 0;
}
void db_disconnect(void)
{
if(mysql_object)
{
mysql_close(mysql_object);
_log(GENERAL, "Connection to database closed.");
}
mysql_object = NULL;
}
void dump_mysql_result_query(const char * const query)
{
if(db_connect()) return;
MYSQL_RES * result;
mysql_query(mysql_object, query);
result = mysql_store_result(mysql_object);
if(!result) return;
dump_mysql_result(result);
mysql_free_result(result);
}
void dump_mysql_result(MYSQL_RES * result)
{
MYSQL_ROW row;
MYSQL_FIELD * fields = mysql_fetch_fields(result);
word num_fields = mysql_num_fields(result);
word num_rows = mysql_num_rows(result);
word field, row_i;
char zs[1024];
sprintf(zs, "Result dump: %d rows of %d fields", num_rows, num_fields); _log(MINOR, zs);
for(row_i = 0; row_i < num_rows; row_i++)
{
sprintf(zs, "Row %d", row_i);
_log(MINOR, zs);
row = mysql_fetch_row(result);
for(field = 0; field < num_fields; field++)
{
sprintf(zs, " %s = \"%s\"", fields[field].name, row[field]);
// See if we can spot a timestamp
if(row[field][0] == '1' && strlen(row[field]) == 10)
{
time_t stamp = atol(row[field]);
// Accept Jan 2008 to May 2033
// 1,200,000,000 2,000,000,000
if(stamp > 1200000000L && stamp < 2000000000L)
{
strcat(zs, " ");
strcat(zs, time_text(stamp, false ));
}
}
_log(MINOR, zs);
}
}
}
dword db_insert_id(void)
{
if(mysql_object) return mysql_insert_id(mysql_object);
return 0;
}
dword db_real_escape_string(char * to, char* from, size_t size)
{
if(mysql_object)
{
return mysql_real_escape_string(mysql_object, to, from, size);
}
else
{
to[0] = '\0';
return 0;
}
}