From: Jeremy Tan 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 +#include +#include +#include + +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); + } +}