first commit!

sqlite_ex.h

@@ -0,0 +1,45 @@
+#define _GNU_SOURCE 1
+
+#include <sqlite3.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define SELECT_MEASUREMENTS "select * from measurements order by date;"
+#define SELECT_COUNT_MEAS "select count(*) from measurements;"
+#define SELECT_ALL_TABLES "select * from sqlite_schema where type = 'table';"
+#define SELECT_TWNTH_DAY "select * from twnth_day;"
+#define SELECT_CURRENT_COSTS "select * from costs where id = ?;"
+#define STR_SIZE 11
+
+typedef struct tm Datetime;
+
+typedef struct {
+  Datetime *datetime;
+  /* NOTE: probably should change to union type?
+   * (to hold both double and int representation, to count the integer cost)
+   */
+  double gas;
+  double water;
+  double electricity;
+  int cost_id;
+} meas;
+
+typedef struct {
+  double gas_c;
+  double water_c;
+  double electricity_c;
+  double housing_c;
+} Cost;
+
+int print_tables(void *, int, char **, char **);
+void print_measurements();
+void free_measurements();
+int dates_same(Datetime *, Datetime *);
+double communal_difference(meas *, meas *);
+int parse_measurements(void *, int, char **, char **);
+int count_measurements(void *, int, char **, char **);
+int select_twnth_day(void *, int, char **, char **);
+void sqlite_list_tables(sqlite3 *db);
+void sqlite_exec_query(char *query, void *callback);