Tue, 01 Sep 2009 13:15:02 +0000
Add __tostring method to connection and statement objects.
#include "dbd_mysql.h" int dbd_mysql_statement_create(lua_State *L, connection_t *conn, const char *sql_query); /* * connection,err = DBD.MySQl.New(dbname, user, password, host, port) */ static int connection_new(lua_State *L) { int n = lua_gettop(L); connection_t *conn = NULL; const char *host = NULL; const char *user = NULL; const char *password = NULL; const char *db = NULL; int port = 0; const char *unix_socket = NULL; /* TODO always NULL */ int client_flag = 0; /* TODO always 0, set flags from options table */ /* db, user, password, host, port */ switch (n) { case 5: if (lua_isnil(L, 5) == 0) port = luaL_checkint(L, 5); case 4: if (lua_isnil(L, 4) == 0) host = luaL_checkstring(L, 4); case 3: if (lua_isnil(L, 3) == 0) password = luaL_checkstring(L, 3); case 2: if (lua_isnil(L, 2) == 0) user = luaL_checkstring(L, 2); case 1: /* * db is the only mandatory parameter */ db = luaL_checkstring(L, 1); } conn = (connection_t *)lua_newuserdata(L, sizeof(connection_t)); conn->mysql = mysql_init(NULL); if (!mysql_real_connect(conn->mysql, host, user, password, db, port, unix_socket, client_flag)) { lua_pushnil(L); lua_pushfstring(L, DBI_ERR_CONNECTION_FAILED, mysql_error(conn->mysql)); return 2; } /* * by default turn off autocommit */ mysql_autocommit(conn->mysql, 0); luaL_getmetatable(L, DBD_MYSQL_CONNECTION); lua_setmetatable(L, -2); return 1; } /* * success = connection:autocommit(on) */ static int connection_autocommit(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); int on = lua_toboolean(L, 2); int err = 0; if (conn->mysql) { err = mysql_autocommit(conn->mysql, on); } lua_pushboolean(L, !err); return 1; } /* * success = connection:close() */ static int connection_close(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); int disconnect = 0; if (conn->mysql) { mysql_close(conn->mysql); disconnect = 1; conn->mysql = NULL; } lua_pushboolean(L, disconnect); return 1; } /* * success = connection:commit() */ static int connection_commit(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); int err = 0; if (conn->mysql) { err = mysql_commit(conn->mysql); } lua_pushboolean(L, !err); return 1; } /* * ok = connection:ping() */ static int connection_ping(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); int err = 1; if (conn->mysql) { err = mysql_ping(conn->mysql); } lua_pushboolean(L, !err); return 1; } /* * statement,err = connection:prepare(sql_string) */ static int connection_prepare(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); if (conn->mysql) { return dbd_mysql_statement_create(L, conn, luaL_checkstring(L, 2)); } lua_pushnil(L); lua_pushstring(L, DBI_ERR_DB_UNAVAILABLE); return 2; } /* * quoted = connection:quote(str) */ static int connection_quote(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); size_t len; const char *from = luaL_checklstring(L, 2, &len); char *to = (char *)calloc(len*2+1, sizeof(char)); int quoted_len; if (!conn->mysql) { luaL_error(L, DBI_ERR_DB_UNAVAILABLE); } quoted_len = mysql_real_escape_string(conn->mysql, to, from, len); lua_pushlstring(L, to, quoted_len); free(to); return 1; } /* * success = connection:rollback() */ static int connection_rollback(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); int err = 0; if (conn->mysql) { err = mysql_rollback(conn->mysql); } lua_pushboolean(L, !err); return 1; } /* * __gc */ static int connection_gc(lua_State *L) { /* always close the connection */ connection_close(L); return 0; } /* * __tostring */ static int connection_tostring(lua_State *L) { connection_t *conn = (connection_t *)luaL_checkudata(L, 1, DBD_MYSQL_CONNECTION); lua_pushfstring(L, "%s: %p", DBD_MYSQL_CONNECTION, conn); return 1; } int dbd_mysql_connection(lua_State *L) { static const luaL_Reg connection_methods[] = { {"autocommit", connection_autocommit}, {"close", connection_close}, {"commit", connection_commit}, {"ping", connection_ping}, {"prepare", connection_prepare}, {"quote", connection_quote}, {"rollback", connection_rollback}, {NULL, NULL} }; static const luaL_Reg connection_class_methods[] = { {"New", connection_new}, {NULL, NULL} }; luaL_newmetatable(L, DBD_MYSQL_CONNECTION); luaL_register(L, 0, connection_methods); lua_pushvalue(L,-1); lua_setfield(L, -2, "__index"); lua_pushcfunction(L, connection_gc); lua_setfield(L, -2, "__gc"); lua_pushcfunction(L, connection_tostring); lua_setfield(L, -2, "__tostring"); luaL_register(L, DBD_MYSQL_CONNECTION, connection_class_methods); return 1; }