From: Jeremy Tan <jeremy@jx.tan.fake>
Date: Tue, 13 Aug 2013 12:18:26 +0000 (+0800)
Subject: add some random code playing with sqlite3 C api
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=853b6f3082cb5549b1efe4cd6626def9fd09b240;p=matches%2FMCTX3420.git

add some random code playing with sqlite3 C api
---

diff --git a/testing/sqlite-approach/testapp/test.c b/testing/sqlite-approach/testapp/test.c
new file mode 100644
index 0000000..cd6e850
--- /dev/null
+++ b/testing/sqlite-approach/testapp/test.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sqlite3.h>
+
+static void updateSensor(sqlite3* db, int id, int value);
+
+int main(int argc, char *argv[]) {
+	if (argc != 2) {
+		printf ("Usage: %s db_location\n", argv[0]);
+		return 1;
+	}
+
+	sqlite3* db;
+	int ret;
+
+	if (ret = sqlite3_open(argv[1], &db) != SQLITE_OK) {
+		printf("Error opening database: %s\n",
+			sqlite3_errstr(ret));
+		return 1;
+	}
+
+	sqlite3_stmt *statement;
+	char *query = "insert into sensors values(3,4)";
+	if (ret = sqlite3_prepare(db, query, (int)strlen(query) + 1, &statement, NULL) != SQLITE_OK) {
+		printf("Error in query: %s\n",
+			sqlite3_errstr(ret));
+	}
+
+	sqlite3_step(statement);
+	sqlite3_finalize(statement);
+
+	updateSensor(db, 44, 2332);
+	sqlite3_close(db);
+	return 0;
+}
+
+static void updateSensor(sqlite3* db, int id, int value) {
+	char query[BUFSIZ];
+	snprintf(query, BUFSIZ, "update sensors set value=%d where id=%d", value, id);
+
+	//Needs error checking
+	int ret;
+	if (ret = sqlite3_exec(db, query, NULL, NULL, NULL) != SQLITE_OK) {
+		printf("Error: %s\n", sqlite3_errstr(ret));
+	}
+	if (!sqlite3_changes(db)) {
+		printf("Record doesn't exist; creating!\n");
+		snprintf(query, BUFSIZ, "insert into sensors values(%d, %d)", id, value);
+		sqlite3_exec(db, query, NULL, NULL, NULL);
+	}
+}