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annotate libraries/mondelefant/mondelefant_native.c @ 396:762ab1e87702

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Use uservalues rather than ephemeron tables in mondelefant
author jbe
date Wed Dec 09 21:16:24 2015 +0100 (2015-12-09)
parents b2d2ff6e4385
children 46ba2168693a
rev   line source
jbe/bsw@0 1 #include <lua.h>
jbe/bsw@0 2 #include <lauxlib.h>
jbe/bsw@0 3 #include <libpq-fe.h>
jbe/bsw@0 4 #include <postgres.h>
jbe/bsw@0 5 #include <catalog/pg_type.h>
jbe/bsw@0 6 #include <stdint.h>
jbe@393 7 #include <time.h>
jbe/bsw@0 8
jbe@23 9 // NOTE: Comments with format "// <number>" denote the Lua stack position
jbe@23 10
jbe@23 11 // prefix for all Lua registry entries of this library:
jbe@23 12 #define MONDELEFANT_REGKEY "e449ba8d9a53d353_mondelefant_"
jbe/bsw@0 13
jbe@23 14 // registry key of module "mondelefant_native":
jbe@23 15 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module")
jbe@23 16 // registry key of meta-table for database connections:
jbe@23 17 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection")
jbe@23 18 // registry key of meta-table for database result lists and objects:
jbe@23 19 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result")
jbe@23 20 // registry key of meta-table for database error objects:
jbe@23 21 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject")
jbe@23 22 // registry key of meta-table for models (named classes here):
jbe@23 23 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class")
jbe@23 24 // registry key of default prototype for models/classes:
jbe@23 25 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto")
jbe/bsw@0 26
jbe@23 27 // C-structure for database connection userdata:
jbe/bsw@0 28 typedef struct {
jbe/bsw@0 29 PGconn *pgconn;
jbe/bsw@0 30 int server_encoding;
jbe/bsw@0 31 } mondelefant_conn_t;
jbe@23 32 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
jbe@23 33 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
jbe/bsw@0 34
jbe@23 35 // transform codepoint-position to byte-position for a given UTF-8 string:
jbe/bsw@0 36 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
jbe/bsw@0 37 size_t bytepos;
jbe/bsw@0 38 for (bytepos = 0; utf8pos > 0; bytepos++) {
jbe/bsw@0 39 uint8_t c;
jbe/bsw@0 40 c = ((const uint8_t *)str)[bytepos];
jbe/bsw@0 41 if (!c) break;
jbe/bsw@0 42 if (c <= 0x7f || c >= 0xc0) utf8pos--;
jbe/bsw@0 43 }
jbe/bsw@0 44 return bytepos;
jbe/bsw@0 45 }
jbe/bsw@0 46
jbe@23 47 // PostgreSQL's OID for binary data type (bytea):
jbe/bsw@0 48 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
jbe/bsw@0 49
jbe@23 50 // mapping a PostgreSQL type given by its OID to a string identifier:
jbe/bsw@0 51 static const char *mondelefant_oid_to_typestr(Oid oid) {
jbe/bsw@0 52 switch (oid) {
jbe/bsw@0 53 case 16: return "bool";
jbe/bsw@0 54 case 17: return "bytea";
jbe/bsw@0 55 case 18: return "char";
jbe/bsw@0 56 case 19: return "name";
jbe/bsw@0 57 case 20: return "int8";
jbe/bsw@0 58 case 21: return "int2";
jbe/bsw@0 59 case 23: return "int4";
jbe/bsw@0 60 case 25: return "text";
jbe/bsw@0 61 case 26: return "oid";
jbe/bsw@0 62 case 27: return "tid";
jbe/bsw@0 63 case 28: return "xid";
jbe/bsw@0 64 case 29: return "cid";
jbe@176 65 case 114: return "json";
jbe/bsw@0 66 case 600: return "point";
jbe/bsw@0 67 case 601: return "lseg";
jbe/bsw@0 68 case 602: return "path";
jbe/bsw@0 69 case 603: return "box";
jbe/bsw@0 70 case 604: return "polygon";
jbe/bsw@0 71 case 628: return "line";
jbe/bsw@0 72 case 700: return "float4";
jbe/bsw@0 73 case 701: return "float8";
jbe/bsw@0 74 case 705: return "unknown";
jbe/bsw@0 75 case 718: return "circle";
jbe/bsw@0 76 case 790: return "money";
jbe/bsw@0 77 case 829: return "macaddr";
jbe/bsw@0 78 case 869: return "inet";
jbe/bsw@0 79 case 650: return "cidr";
jbe/bsw@0 80 case 1042: return "bpchar";
jbe/bsw@0 81 case 1043: return "varchar";
jbe/bsw@0 82 case 1082: return "date";
jbe/bsw@0 83 case 1083: return "time";
jbe/bsw@0 84 case 1114: return "timestamp";
jbe/bsw@0 85 case 1184: return "timestamptz";
jbe/bsw@0 86 case 1186: return "interval";
jbe/bsw@0 87 case 1266: return "timetz";
jbe/bsw@0 88 case 1560: return "bit";
jbe/bsw@0 89 case 1562: return "varbit";
jbe/bsw@0 90 case 1700: return "numeric";
jbe@176 91 case 3802: return "jsonb";
jbe/bsw@0 92 default: return NULL;
jbe/bsw@0 93 }
jbe/bsw@0 94 }
jbe/bsw@0 95
jbe@23 96 // This library maps PostgreSQL's error codes to CamelCase string
jbe@23 97 // identifiers, which consist of CamelCase identifiers and are seperated
jbe@23 98 // by dots (".") (no leading or trailing dots).
jbe@23 99 // There are additional error identifiers which do not have a corresponding
jbe@23 100 // PostgreSQL error associated with it.
jbe@23 101
jbe@23 102 // matching start of local variable 'pgcode' against string 'incode',
jbe@23 103 // returning string 'outcode' on match:
jbe/bsw@0 104 #define mondelefant_errcode_item(incode, outcode) \
jbe/bsw@0 105 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
jbe/bsw@0 106
jbe@23 107 // additional error identifiers without corresponding PostgreSQL error:
jbe/bsw@0 108 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
jbe/bsw@0 109 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
jbe/bsw@0 110 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
jbe/bsw@0 111 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
jbe/bsw@0 112 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
jbe/bsw@0 113 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
jbe/bsw@0 114
jbe@23 115 // mapping PostgreSQL error code to error code as returned by this library:
jbe/bsw@0 116 static const char *mondelefant_translate_errcode(const char *pgcode) {
jbe/bsw@0 117 if (!pgcode) abort(); // should not happen
jbe/bsw@0 118 mondelefant_errcode_item("02", "NoData")
jbe/bsw@0 119 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
jbe/bsw@0 120 mondelefant_errcode_item("08", "ConnectionException")
jbe/bsw@0 121 mondelefant_errcode_item("09", "TriggeredActionException")
jbe/bsw@0 122 mondelefant_errcode_item("0A", "FeatureNotSupported")
jbe/bsw@0 123 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
jbe/bsw@0 124 mondelefant_errcode_item("0F", "LocatorException")
jbe/bsw@0 125 mondelefant_errcode_item("0L", "InvalidGrantor")
jbe/bsw@0 126 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
jbe/bsw@0 127 mondelefant_errcode_item("21", "CardinalityViolation")
jbe/bsw@0 128 mondelefant_errcode_item("22", "DataException")
jbe/bsw@0 129 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
jbe/bsw@0 130 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
jbe/bsw@0 131 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
jbe/bsw@0 132 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
jbe/bsw@0 133 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
jbe/bsw@0 134 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
jbe/bsw@0 135 mondelefant_errcode_item("24", "InvalidCursorState")
jbe/bsw@0 136 mondelefant_errcode_item("25", "InvalidTransactionState")
jbe/bsw@0 137 mondelefant_errcode_item("26", "InvalidSqlStatementName")
jbe/bsw@0 138 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
jbe/bsw@0 139 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
jbe/bsw@0 140 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
jbe/bsw@0 141 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
jbe/bsw@0 142 mondelefant_errcode_item("2F", "SqlRoutineException")
jbe/bsw@0 143 mondelefant_errcode_item("34", "InvalidCursorName")
jbe/bsw@0 144 mondelefant_errcode_item("38", "ExternalRoutineException")
jbe/bsw@0 145 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
jbe/bsw@0 146 mondelefant_errcode_item("3B", "SavepointException")
jbe/bsw@0 147 mondelefant_errcode_item("3D", "InvalidCatalogName")
jbe/bsw@0 148 mondelefant_errcode_item("3F", "InvalidSchemaName")
jbe/bsw@0 149 mondelefant_errcode_item("40", "TransactionRollback")
jbe/bsw@0 150 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
jbe/bsw@0 151 mondelefant_errcode_item("44", "WithCheckOptionViolation")
jbe/bsw@0 152 mondelefant_errcode_item("53", "InsufficientResources")
jbe/bsw@0 153 mondelefant_errcode_item("54", "ProgramLimitExceeded")
jbe/bsw@0 154 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
jbe/bsw@0 155 mondelefant_errcode_item("57", "OperatorIntervention")
jbe/bsw@0 156 mondelefant_errcode_item("58", "SystemError")
jbe/bsw@0 157 mondelefant_errcode_item("F0", "ConfigurationFileError")
jbe/bsw@0 158 mondelefant_errcode_item("P0", "PlpgsqlError")
jbe/bsw@0 159 mondelefant_errcode_item("XX", "InternalError")
jbe/bsw@0 160 return "unknown";
jbe/bsw@0 161 }
jbe/bsw@0 162
jbe@23 163 // C-function, checking if a given error code (as defined by this library)
jbe@23 164 // is belonging to a certain class of errors (strings are equal or error
jbe@23 165 // code begins with error class followed by a dot):
jbe/bsw@0 166 static int mondelefant_check_error_class(
jbe/bsw@0 167 const char *errcode, const char *errclass
jbe/bsw@0 168 ) {
jbe/bsw@0 169 size_t i = 0;
jbe/bsw@0 170 while (1) {
jbe/bsw@0 171 if (errclass[i] == 0) {
jbe/bsw@0 172 if (errcode[i] == 0 || errcode[i] == '.') return 1;
jbe/bsw@0 173 else return 0;
jbe/bsw@0 174 }
jbe/bsw@0 175 if (errcode[i] != errclass[i]) return 0;
jbe/bsw@0 176 i++;
jbe/bsw@0 177 }
jbe/bsw@0 178 }
jbe/bsw@0 179
jbe@23 180 // pushing first line of a string on Lua's stack (without trailing CR/LF):
jbe/bsw@0 181 static void mondelefant_push_first_line(lua_State *L, const char *str) {
jbe/bsw@0 182 char *str2;
jbe/bsw@0 183 size_t i = 0;
jbe/bsw@0 184 if (!str) abort(); // should not happen
jbe/bsw@0 185 str2 = strdup(str);
jbe/bsw@0 186 while (1) {
jbe/bsw@0 187 char c = str2[i];
jbe/bsw@0 188 if (c == '\n' || c == '\r' || c == 0) { str2[i] = 0; break; }
jbe/bsw@0 189 i++;
jbe/bsw@0 190 };
jbe/bsw@0 191 lua_pushstring(L, str2);
jbe/bsw@0 192 free(str2);
jbe/bsw@0 193 }
jbe/bsw@0 194
jbe@23 195 // "connect" function of library, which establishes a database connection
jbe@23 196 // and returns a database connection handle:
jbe/bsw@0 197 static int mondelefant_connect(lua_State *L) {
jbe@23 198 luaL_Buffer buf; // Lua string buffer to create 'conninfo' (see below)
jbe@23 199 const char *conninfo; // string for PQconnectdb function
jbe@23 200 PGconn *pgconn; // PGconn object as returned by PQconnectdb function
jbe@23 201 mondelefant_conn_t *conn; // C-structure for userdata
jbe@23 202 // if engine is anything but "postgresql", then raise error:
jbe/bsw@0 203 lua_settop(L, 1);
jbe/bsw@0 204 lua_getfield(L, 1, "engine"); // 2
jbe/bsw@0 205 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 206 return luaL_error(L, "No database engine selected.");
jbe/bsw@0 207 }
jbe/bsw@0 208 lua_pushliteral(L, "postgresql"); // 3
jbe/bsw@0 209 if (!lua_rawequal(L, 2, 3)) {
jbe/bsw@0 210 return luaL_error(L,
jbe/bsw@0 211 "Only database engine 'postgresql' is supported."
jbe/bsw@0 212 );
jbe/bsw@0 213 }
jbe@40 214 // copy conninfo string for PQconnectdb function from argument table to
jbe@40 215 // stack position 2:
jbe/bsw@0 216 lua_settop(L, 1);
jbe@40 217 lua_getfield(L, 1, "conninfo"); // 2
jbe@40 218 // if no conninfo string was found, then assemble one from the named
jbe@40 219 // options except "engine" option:
jbe@40 220 if (!lua_toboolean(L, 2)) {
jbe@40 221 lua_settop(L, 1);
jbe@40 222 lua_pushnil(L); // slot for key at stack position 2
jbe@40 223 lua_pushnil(L); // slot for value at stack position 3
jbe@40 224 luaL_buffinit(L, &buf);
jbe@40 225 {
jbe@40 226 int need_seperator = 0;
jbe@40 227 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
jbe@40 228 lua_replace(L, 3);
jbe@40 229 lua_replace(L, 2);
jbe@40 230 // NOTE: numbers will be converted to strings automatically here,
jbe@40 231 // but perhaps this will change in future versions of lua
jbe@40 232 luaL_argcheck(L,
jbe@40 233 lua_isstring(L, 2) && lua_isstring(L, 3), 1, "non-string contained"
jbe@40 234 );
jbe@40 235 lua_pushvalue(L, 2);
jbe@40 236 lua_pushliteral(L, "engine");
jbe@40 237 if (!lua_rawequal(L, -2, -1)) {
jbe@40 238 const char *value;
jbe@40 239 size_t value_len;
jbe@40 240 size_t value_pos = 0;
jbe@40 241 lua_pop(L, 1);
jbe@40 242 if (need_seperator) luaL_addchar(&buf, ' ');
jbe@40 243 luaL_addvalue(&buf);
jbe@40 244 luaL_addchar(&buf, '=');
jbe@40 245 luaL_addchar(&buf, '\'');
jbe@40 246 value = lua_tolstring(L, 3, &value_len);
jbe@40 247 do {
jbe@40 248 char c;
jbe@40 249 c = value[value_pos++];
jbe@40 250 if (c == '\'') luaL_addchar(&buf, '\\');
jbe@40 251 luaL_addchar(&buf, c);
jbe@40 252 } while (value_pos < value_len);
jbe@40 253 luaL_addchar(&buf, '\'');
jbe@40 254 need_seperator = 1;
jbe@40 255 } else {
jbe@40 256 lua_pop(L, 1);
jbe@40 257 }
jbe/bsw@0 258 }
jbe/bsw@0 259 }
jbe@40 260 luaL_pushresult(&buf);
jbe@40 261 lua_replace(L, 2);
jbe@40 262 lua_settop(L, 2);
jbe/bsw@0 263 }
jbe@40 264 // use conninfo string on stack position 2:
jbe/bsw@0 265 conninfo = lua_tostring(L, 2);
jbe@23 266 // call PQconnectdb function of libpq:
jbe/bsw@0 267 pgconn = PQconnectdb(conninfo);
jbe@23 268 // throw errors, if neccessary:
jbe/bsw@0 269 if (!pgconn) {
jbe/bsw@0 270 return luaL_error(L,
jbe/bsw@0 271 "Error in libpq while creating 'PGconn' structure."
jbe/bsw@0 272 );
jbe/bsw@0 273 }
jbe/bsw@0 274 if (PQstatus(pgconn) != CONNECTION_OK) {
jbe/bsw@0 275 const char *errmsg;
jbe/bsw@0 276 lua_pushnil(L);
jbe/bsw@0 277 errmsg = PQerrorMessage(pgconn);
jbe/bsw@0 278 if (errmsg) {
jbe/bsw@0 279 mondelefant_push_first_line(L, errmsg);
jbe/bsw@0 280 } else {
jbe/bsw@0 281 lua_pushliteral(L,
jbe/bsw@0 282 "Error while connecting to database, but no error message given."
jbe/bsw@0 283 );
jbe/bsw@0 284 }
jbe/bsw@0 285 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 286 PQfinish(pgconn);
jbe/bsw@0 287 return 3;
jbe/bsw@0 288 }
jbe@23 289 // create userdata:
jbe/bsw@0 290 lua_settop(L, 0);
jbe/bsw@0 291 conn = lua_newuserdata(L, sizeof(*conn)); // 1
jbe@23 292 // set 'pgconn' in C-struct of userdata:
jbe/bsw@0 293 conn->pgconn = pgconn;
jbe@23 294 // set 'server_encoding' in C-struct of userdata:
jbe/bsw@0 295 {
jbe/bsw@0 296 const char *charset;
jbe/bsw@0 297 charset = PQparameterStatus(pgconn, "server_encoding");
jbe/bsw@0 298 if (charset && !strcmp(charset, "UTF8")) {
jbe/bsw@0 299 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
jbe/bsw@0 300 } else {
jbe/bsw@0 301 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
jbe/bsw@0 302 }
jbe/bsw@0 303 }
jbe@23 304 // set meta-table of userdata:
jbe/bsw@0 305 luaL_getmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe/bsw@0 306 lua_setmetatable(L, 1);
jbe@396 307 // create and associate userdata table:
jbe@396 308 lua_newtable(L);
jbe@396 309 lua_setuservalue(L, 1);
jbe@396 310 // store key "fd" with file descriptor of connection:
jbe@396 311 lua_pushinteger(L, PQsocket(pgconn));
jbe@396 312 lua_setfield(L, 1, "fd");
jbe@23 313 // store key "engine" with value "postgresql" as connection specific data:
jbe/bsw@0 314 lua_pushliteral(L, "postgresql");
jbe/bsw@0 315 lua_setfield(L, 1, "engine");
jbe@23 316 // return userdata:
jbe/bsw@0 317 return 1;
jbe/bsw@0 318 }
jbe/bsw@0 319
jbe@23 320 // returns pointer to libpq handle 'pgconn' of userdata at given index
jbe@23 321 // (or throws error, if database connection has been closed):
jbe/bsw@0 322 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
jbe/bsw@0 323 mondelefant_conn_t *conn;
jbe/bsw@0 324 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 325 if (!conn->pgconn) {
jbe/bsw@0 326 luaL_error(L, "PostgreSQL connection has been closed.");
jbe/bsw@0 327 return NULL;
jbe/bsw@0 328 }
jbe/bsw@0 329 return conn;
jbe/bsw@0 330 }
jbe/bsw@0 331
jbe@23 332 // meta-method "__index" of database handles (userdata):
jbe/bsw@0 333 static int mondelefant_conn_index(lua_State *L) {
jbe@23 334 // try table for connection specific data:
jbe/bsw@0 335 lua_settop(L, 2);
jbe@396 336 lua_getuservalue(L, 1); // 3
jbe/bsw@0 337 lua_pushvalue(L, 2); // 4
jbe/bsw@0 338 lua_gettable(L, 3); // 4
jbe/bsw@0 339 if (!lua_isnil(L, 4)) return 1;
jbe@23 340 // try to use prototype stored in connection specific data:
jbe/bsw@0 341 lua_settop(L, 3);
jbe/bsw@0 342 lua_getfield(L, 3, "prototype"); // 4
jbe/bsw@0 343 if (lua_toboolean(L, 4)) {
jbe/bsw@0 344 lua_pushvalue(L, 2); // 5
jbe/bsw@0 345 lua_gettable(L, 4); // 5
jbe/bsw@0 346 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 347 }
jbe@23 348 // try to use "postgresql_connection_prototype" of library:
jbe/bsw@0 349 lua_settop(L, 2);
jbe/bsw@0 350 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
jbe/bsw@0 351 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
jbe/bsw@0 352 if (lua_toboolean(L, 4)) {
jbe/bsw@0 353 lua_pushvalue(L, 2); // 5
jbe/bsw@0 354 lua_gettable(L, 4); // 5
jbe/bsw@0 355 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 356 }
jbe@23 357 // try to use "connection_prototype" of library:
jbe/bsw@0 358 lua_settop(L, 3);
jbe/bsw@0 359 lua_getfield(L, 3, "connection_prototype"); // 4
jbe/bsw@0 360 if (lua_toboolean(L, 4)) {
jbe/bsw@0 361 lua_pushvalue(L, 2); // 5
jbe/bsw@0 362 lua_gettable(L, 4); // 5
jbe/bsw@0 363 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 364 }
jbe@23 365 // give up and return nothing:
jbe/bsw@0 366 return 0;
jbe/bsw@0 367 }
jbe/bsw@0 368
jbe@23 369 // meta-method "__newindex" of database handles (userdata):
jbe/bsw@0 370 static int mondelefant_conn_newindex(lua_State *L) {
jbe@23 371 // store key-value pair in table for connection specific data:
jbe/bsw@0 372 lua_settop(L, 3);
jbe@396 373 lua_getuservalue(L, 1); // 4
jbe/bsw@0 374 lua_pushvalue(L, 2);
jbe/bsw@0 375 lua_pushvalue(L, 3);
jbe/bsw@0 376 lua_settable(L, 4);
jbe@23 377 // return nothing:
jbe/bsw@0 378 return 0;
jbe/bsw@0 379 }
jbe/bsw@0 380
jbe@23 381 // meta-method "__gc" of database handles:
jbe/bsw@0 382 static int mondelefant_conn_free(lua_State *L) {
jbe/bsw@0 383 mondelefant_conn_t *conn;
jbe/bsw@0 384 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 385 if (conn->pgconn) PQfinish(conn->pgconn);
jbe/bsw@0 386 conn->pgconn = NULL;
jbe/bsw@0 387 return 0;
jbe/bsw@0 388 }
jbe/bsw@0 389
jbe@23 390 // method "close" of database handles:
jbe/bsw@0 391 static int mondelefant_conn_close(lua_State *L) {
jbe/bsw@0 392 mondelefant_conn_t *conn;
jbe/bsw@0 393 lua_settop(L, 1);
jbe/bsw@0 394 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 395 PQfinish(conn->pgconn);
jbe/bsw@0 396 conn->pgconn = NULL;
jbe@396 397 lua_pushnil(L); // 2
jbe@396 398 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
jbe/bsw@0 399 return 0;
jbe/bsw@0 400 }
jbe/bsw@0 401
jbe@23 402 // method "is_okay" of database handles:
jbe/bsw@0 403 static int mondelefant_conn_is_ok(lua_State *L) {
jbe/bsw@0 404 mondelefant_conn_t *conn;
jbe/bsw@0 405 lua_settop(L, 1);
jbe/bsw@0 406 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 407 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
jbe/bsw@0 408 return 1;
jbe/bsw@0 409 }
jbe/bsw@0 410
jbe@23 411 // method "get_transaction_status" of database handles:
jbe/bsw@0 412 static int mondelefant_conn_get_transaction_status(lua_State *L) {
jbe/bsw@0 413 mondelefant_conn_t *conn;
jbe/bsw@0 414 lua_settop(L, 1);
jbe/bsw@0 415 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 416 switch (PQtransactionStatus(conn->pgconn)) {
jbe/bsw@0 417 case PQTRANS_IDLE:
jbe/bsw@0 418 lua_pushliteral(L, "idle");
jbe/bsw@0 419 break;
jbe/bsw@0 420 case PQTRANS_ACTIVE:
jbe/bsw@0 421 lua_pushliteral(L, "active");
jbe/bsw@0 422 break;
jbe/bsw@0 423 case PQTRANS_INTRANS:
jbe/bsw@0 424 lua_pushliteral(L, "intrans");
jbe/bsw@0 425 break;
jbe/bsw@0 426 case PQTRANS_INERROR:
jbe/bsw@0 427 lua_pushliteral(L, "inerror");
jbe/bsw@0 428 break;
jbe/bsw@0 429 default:
jbe/bsw@0 430 lua_pushliteral(L, "unknown");
jbe/bsw@0 431 }
jbe/bsw@0 432 return 1;
jbe/bsw@0 433 }
jbe/bsw@0 434
jbe@393 435 // method "wait" of database handles:
jbe@393 436 static int mondelefant_conn_wait(lua_State *L) {
jbe@393 437 mondelefant_conn_t *conn;
jbe@393 438 int infinite, nonblock = 0;
jbe@393 439 struct timespec wakeup;
jbe@393 440 int fd;
jbe@393 441 fd_set fds;
jbe@393 442 conn = mondelefant_get_conn(L, 1);
jbe@393 443 infinite = lua_isnoneornil(L, 2);
jbe@393 444 if (!infinite) {
jbe@393 445 lua_Number n;
jbe@393 446 int isnum;
jbe@393 447 n = lua_tonumberx(L, 2, &isnum);
jbe@393 448 if (isnum && n>0 && n<=86400*366) {
jbe@393 449 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
jbe@393 450 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 451 }
jbe@393 452 wakeup.tv_sec += n;
jbe@393 453 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
jbe@393 454 if (wakeup.tv_nsec >= 1000000000) {
jbe@393 455 wakeup.tv_sec += 1;
jbe@393 456 wakeup.tv_nsec -= 1000000000;
jbe@393 457 }
jbe@393 458 } else if (isnum && n==0) {
jbe@393 459 nonblock = 1;
jbe@393 460 } else {
jbe@393 461 luaL_argcheck(L, 0, 2, "not a valid timeout");
jbe@393 462 }
jbe@393 463 }
jbe@393 464 if (!nonblock) {
jbe@393 465 fd = PQsocket(conn->pgconn);
jbe@393 466 FD_ZERO(&fds);
jbe@393 467 FD_SET(fd, &fds);
jbe@393 468 }
jbe@393 469 while (true) {
jbe@393 470 {
jbe@393 471 PGnotify *notify;
jbe@393 472 if (!PQconsumeInput(conn->pgconn)) {
jbe@393 473 lua_pushnil(L);
jbe@393 474 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe@393 475 return 2;
jbe@393 476 }
jbe@393 477 notify = PQnotifies(conn->pgconn);
jbe@393 478 if (notify) {
jbe@393 479 lua_pushstring(L, notify->relname);
jbe@393 480 lua_pushstring(L, notify->extra);
jbe@393 481 lua_pushinteger(L, notify->be_pid);
jbe@393 482 PQfreemem(notify);
jbe@393 483 return 3;
jbe@393 484 }
jbe@393 485 }
jbe@393 486 if (infinite) {
jbe@393 487 select(fd+1, &fds, NULL, NULL, NULL);
jbe@393 488 } else if (nonblock) {
jbe@393 489 break;
jbe@393 490 } else {
jbe@393 491 struct timespec tp;
jbe@393 492 struct timeval timeout = { 0, };
jbe@393 493 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@393 494 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 495 }
jbe@393 496 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
jbe@393 497 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
jbe@393 498 if (tp.tv_nsec < 0) {
jbe@393 499 tp.tv_sec -= 1;
jbe@393 500 tp.tv_nsec += 1000000000;
jbe@393 501 }
jbe@393 502 timeout.tv_sec = tp.tv_sec;
jbe@393 503 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
jbe@393 504 if (
jbe@393 505 timeout.tv_sec < 0 ||
jbe@393 506 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
jbe@393 507 ) break;
jbe@393 508 select(fd+1, &fds, NULL, NULL, &timeout);
jbe@393 509 }
jbe@393 510 }
jbe@393 511 lua_pushboolean(L, 0);
jbe@393 512 if (nonblock) lua_pushliteral(L, "No notification pending");
jbe@393 513 else lua_pushliteral(L, "Timeout while waiting for notification");
jbe@393 514 return 2;
jbe@393 515 }
jbe@393 516
jbe@23 517 // method "create_list" of database handles:
jbe/bsw@0 518 static int mondelefant_conn_create_list(lua_State *L) {
jbe@23 519 // ensure that first argument is a database connection:
jbe/bsw@0 520 lua_settop(L, 2);
jbe/bsw@0 521 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 522 // if no second argument is given, use an empty table:
jbe/bsw@0 523 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 524 lua_newtable(L);
jbe/bsw@0 525 lua_replace(L, 2); // new result at stack position 2
jbe/bsw@0 526 }
jbe@23 527 // set meta-table for database result lists/objects:
jbe/bsw@0 528 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
jbe/bsw@0 529 lua_setmetatable(L, 2);
jbe@23 530 // set "_connection" attribute to self:
jbe/bsw@0 531 lua_pushvalue(L, 1); // 3
jbe/bsw@0 532 lua_setfield(L, 2, "_connection");
jbe@23 533 // set "_type" attribute to string "list":
jbe/bsw@0 534 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 535 lua_setfield(L, 2, "_type");
jbe@23 536 // return created database result list:
jbe/bsw@0 537 return 1;
jbe/bsw@0 538 }
jbe/bsw@0 539
jbe@23 540 // method "create_object" of database handles:
jbe/bsw@0 541 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 542 // ensure that first argument is a database connection:
jbe/bsw@0 543 lua_settop(L, 2);
jbe/bsw@0 544 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 545 // if no second argument is given, use an empty table:
jbe/bsw@0 546 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 547 lua_newtable(L);
jbe/bsw@0 548 lua_replace(L, 2); // new result at stack position 2
jbe/bsw@0 549 }
jbe@23 550 // set meta-table for database result lists/objects:
jbe/bsw@0 551 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
jbe/bsw@0 552 lua_setmetatable(L, 2);
jbe@23 553 // set "_connection" attribute to self:
jbe/bsw@0 554 lua_pushvalue(L, 1); // 3
jbe/bsw@0 555 lua_setfield(L, 2, "_connection");
jbe@23 556 // set "_type" attribute to string "object":
jbe/bsw@0 557 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 558 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@23 559 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 560 lua_newtable(L); // 3
jbe/bsw@0 561 lua_setfield(L, 2, "_data");
jbe/bsw@0 562 lua_newtable(L); // 3
jbe/bsw@0 563 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 564 lua_newtable(L); // 3
jbe/bsw@0 565 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@23 566 // return created database result object:
jbe/bsw@0 567 return 1;
jbe/bsw@0 568 }
jbe/bsw@0 569
jbe@23 570 // method "quote_string" of database handles:
jbe/bsw@0 571 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 572 mondelefant_conn_t *conn;
jbe/bsw@0 573 const char *input;
jbe/bsw@0 574 size_t input_len;
jbe/bsw@0 575 char *output;
jbe/bsw@0 576 size_t output_len;
jbe@23 577 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 578 lua_settop(L, 2);
jbe/bsw@0 579 conn = mondelefant_get_conn(L, 1);
jbe@23 580 // get second argument, which must be a string:
jbe/bsw@0 581 input = luaL_checklstring(L, 2, &input_len);
jbe@23 582 // throw error, if string is too long:
jbe/bsw@0 583 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 584 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 585 }
jbe@23 586 // allocate memory for quoted string:
jbe/bsw@0 587 output = malloc((2 * input_len + 3) * sizeof(char));
jbe/bsw@0 588 if (!output) {
jbe/bsw@0 589 return luaL_error(L, "Could not allocate memory for string quoting.");
jbe/bsw@0 590 }
jbe@23 591 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 592 // single quotes:
jbe/bsw@0 593 output[0] = '\'';
jbe/bsw@0 594 output_len = PQescapeStringConn(
jbe/bsw@0 595 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 596 );
jbe/bsw@0 597 output[output_len + 1] = '\'';
jbe/bsw@0 598 output[output_len + 2] = 0;
jbe@23 599 // create Lua string:
jbe/bsw@0 600 lua_pushlstring(L, output, output_len + 2);
jbe@23 601 // free allocated memory:
jbe/bsw@0 602 free(output);
jbe@23 603 // return Lua string:
jbe/bsw@0 604 return 1;
jbe/bsw@0 605 }
jbe/bsw@0 606
jbe@23 607 // method "quote_binary" of database handles:
jbe/bsw@0 608 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 609 mondelefant_conn_t *conn;
jbe/bsw@0 610 const char *input;
jbe/bsw@0 611 size_t input_len;
jbe/bsw@0 612 char *output;
jbe/bsw@0 613 size_t output_len;
jbe/bsw@0 614 luaL_Buffer buf;
jbe@23 615 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 616 lua_settop(L, 2);
jbe/bsw@0 617 conn = mondelefant_get_conn(L, 1);
jbe@23 618 // get second argument, which must be a string:
jbe/bsw@0 619 input = luaL_checklstring(L, 2, &input_len);
jbe@23 620 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 621 output = (char *)PQescapeByteaConn(
jbe/bsw@0 622 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 623 );
jbe@23 624 // if PQescapeByteaConn returned NULL, then throw error:
jbe/bsw@0 625 if (!output) {
jbe/bsw@0 626 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe/bsw@0 627 }
jbe@23 628 // create Lua string enclosed by single quotes:
jbe/bsw@0 629 luaL_buffinit(L, &buf);
jbe/bsw@0 630 luaL_addchar(&buf, '\'');
jbe/bsw@0 631 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 632 luaL_addchar(&buf, '\'');
jbe/bsw@0 633 luaL_pushresult(&buf);
jbe@23 634 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 635 PQfreemem(output);
jbe@23 636 // return Lua string:
jbe/bsw@0 637 return 1;
jbe/bsw@0 638 }
jbe/bsw@0 639
jbe@23 640 // method "assemble_command" of database handles:
jbe/bsw@0 641 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 642 mondelefant_conn_t *conn;
jbe/bsw@0 643 int paramidx = 2;
jbe/bsw@0 644 const char *template;
jbe/bsw@0 645 size_t template_pos = 0;
jbe/bsw@0 646 luaL_Buffer buf;
jbe@23 647 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 648 lua_settop(L, 2);
jbe/bsw@0 649 conn = mondelefant_get_conn(L, 1);
jbe@23 650 // if second argument is a string, return this string:
jbe/bsw@0 651 if (lua_isstring(L, 2)) {
jbe/bsw@0 652 lua_tostring(L, 2);
jbe/bsw@0 653 return 1;
jbe/bsw@0 654 }
jbe@23 655 // if second argument has __tostring meta-method,
jbe@23 656 // then use this method and return its result:
jbe/bsw@0 657 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 658 // otherwise, require that second argument is a table:
jbe/bsw@0 659 luaL_checktype(L, 2, LUA_TTABLE);
jbe@23 660 // get first element of table, which must be a string:
jbe/bsw@0 661 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 662 luaL_argcheck(L,
jbe/bsw@0 663 lua_isstring(L, 3),
jbe/bsw@0 664 2,
jbe/bsw@0 665 "First entry of SQL command structure is not a string."
jbe/bsw@0 666 );
jbe/bsw@0 667 template = lua_tostring(L, 3);
jbe@23 668 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 669 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 670 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 671 // reserve space on Lua stack:
jbe/bsw@0 672 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 673 lua_pushnil(L); // free space at stack position 6
jbe@23 674 // initialize Lua buffer for result string:
jbe/bsw@0 675 luaL_buffinit(L, &buf);
jbe@23 676 // fill buffer in loop:
jbe/bsw@0 677 while (1) {
jbe@23 678 // variable declaration:
jbe/bsw@0 679 char c;
jbe@23 680 // get next character:
jbe/bsw@0 681 c = template[template_pos++];
jbe@23 682 // break, when character is NULL byte:
jbe/bsw@0 683 if (!c) break;
jbe@23 684 // question-mark and dollar-sign are special characters:
jbe@23 685 if (c == '?' || c == '$') { // special character found
jbe@23 686 // check, if same character follows:
jbe@23 687 if (template[template_pos] == c) { // special character is escaped
jbe@23 688 // consume two characters of input and add one character to buffer:
jbe/bsw@0 689 template_pos++;
jbe/bsw@0 690 luaL_addchar(&buf, c);
jbe@23 691 } else { // special character is not escaped
jbe/bsw@0 692 luaL_Buffer keybuf;
jbe/bsw@0 693 int subcmd;
jbe@23 694 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 695 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 696 subcmd = (c == '$');
jbe@23 697 // read any number of alpha numeric chars or underscores
jbe@23 698 // and store them on Lua stack:
jbe/bsw@0 699 luaL_buffinit(L, &keybuf);
jbe/bsw@0 700 while (1) {
jbe/bsw@0 701 c = template[template_pos];
jbe/bsw@0 702 if (
jbe/bsw@0 703 (c < 'A' || c > 'Z') &&
jbe/bsw@0 704 (c < 'a' || c > 'z') &&
jbe/bsw@0 705 (c < '0' || c > '9') &&
jbe/bsw@0 706 (c != '_')
jbe/bsw@0 707 ) break;
jbe/bsw@0 708 luaL_addchar(&keybuf, c);
jbe/bsw@0 709 template_pos++;
jbe/bsw@0 710 }
jbe/bsw@0 711 luaL_pushresult(&keybuf);
jbe@23 712 // check, if any characters matched:
jbe@64 713 #if LUA_VERSION_NUM >= 502
jbe@64 714 if (lua_rawlen(L, -1)) {
jbe@64 715 #else
jbe/bsw@0 716 if (lua_objlen(L, -1)) {
jbe@64 717 #endif
jbe@23 718 // if any alpha numeric chars or underscores were found,
jbe@23 719 // push them on stack as a Lua string and use them to lookup
jbe@23 720 // value from second argument:
jbe/bsw@0 721 lua_pushvalue(L, -1); // save key on stack
jbe@23 722 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 723 } else {
jbe@23 724 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 725 lua_pop(L, 1);
jbe/bsw@0 726 lua_pushnil(L); // put nil on key position
jbe@23 727 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 728 }
jbe@23 729 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 730 // branch according to type of special character ("?" or "$"):
jbe@23 731 if (subcmd) { // dollar-sign
jbe/bsw@0 732 size_t i;
jbe/bsw@0 733 size_t count;
jbe@23 734 // store fetched value (which is supposed to be sub-structure)
jbe@23 735 // on Lua stack position 5 and drop key:
jbe@23 736 lua_replace(L, 5);
jbe@23 737 lua_pop(L, 1);
jbe@23 738 // Lua stack contains: ..., <buffer>
jbe@23 739 // check, if fetched value is really a sub-structure:
jbe/bsw@0 740 luaL_argcheck(L,
jbe/bsw@0 741 !lua_isnil(L, 5),
jbe/bsw@0 742 2,
jbe/bsw@0 743 "SQL sub-structure not found."
jbe/bsw@0 744 );
jbe/bsw@0 745 luaL_argcheck(L,
jbe/bsw@0 746 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 747 2,
jbe/bsw@0 748 "SQL sub-structure must be a table."
jbe/bsw@0 749 );
jbe@23 750 // Lua stack contains: ..., <buffer>
jbe@23 751 // get value of "sep" attribute of sub-structure,
jbe@23 752 // and place it on Lua stack position 6:
jbe/bsw@0 753 lua_getfield(L, 5, "sep");
jbe@23 754 lua_replace(L, 6);
jbe@23 755 // if seperator is nil, then use ", " as default,
jbe@23 756 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 757 if (lua_isnil(L, 6)) {
jbe/bsw@0 758 lua_pushstring(L, ", ");
jbe/bsw@0 759 lua_replace(L, 6);
jbe/bsw@0 760 } else {
jbe/bsw@0 761 luaL_argcheck(L,
jbe/bsw@0 762 lua_isstring(L, 6),
jbe/bsw@0 763 2,
jbe/bsw@0 764 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 765 );
jbe/bsw@0 766 }
jbe@23 767 // iterate over items of sub-structure:
jbe@64 768 #if LUA_VERSION_NUM >= 502
jbe@64 769 count = lua_rawlen(L, 5);
jbe@64 770 #else
jbe/bsw@0 771 count = lua_objlen(L, 5);
jbe@64 772 #endif
jbe/bsw@0 773 for (i = 0; i < count; i++) {
jbe@23 774 // add seperator, unless this is the first run:
jbe/bsw@0 775 if (i) {
jbe/bsw@0 776 lua_pushvalue(L, 6);
jbe/bsw@0 777 luaL_addvalue(&buf);
jbe/bsw@0 778 }
jbe@23 779 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 780 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 781 lua_pushvalue(L, 1);
jbe/bsw@0 782 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 783 lua_call(L, 2, 1);
jbe/bsw@0 784 luaL_addvalue(&buf);
jbe/bsw@0 785 }
jbe@23 786 } else { // question-mark
jbe/bsw@0 787 if (lua_toboolean(L, 4)) {
jbe@23 788 // call input_converter with connection handle, raw-value and
jbe@23 789 // an info-table which contains a "field_name" entry with the
jbe@23 790 // used key:
jbe/bsw@0 791 lua_pushvalue(L, 4);
jbe/bsw@0 792 lua_pushvalue(L, 1);
jbe/bsw@0 793 lua_pushvalue(L, -3);
jbe/bsw@0 794 lua_newtable(L);
jbe/bsw@0 795 lua_pushvalue(L, -6);
jbe/bsw@0 796 lua_setfield(L, -2, "field_name");
jbe/bsw@0 797 lua_call(L, 3, 1);
jbe@23 798 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 799 // remove key and raw-value:
jbe/bsw@0 800 lua_remove(L, -2);
jbe/bsw@0 801 lua_remove(L, -2);
jbe@23 802 // Lua stack contains: ..., <buffer>, final-value
jbe@23 803 // throw error, if final-value is not a string:
jbe/bsw@0 804 if (!lua_isstring(L, -1)) {
jbe/bsw@0 805 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 806 }
jbe/bsw@0 807 } else {
jbe@23 808 // remove key from stack:
jbe/bsw@0 809 lua_remove(L, -2);
jbe@23 810 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 811 // branch according to type of value:
jbe@23 812 if (lua_isnil(L, -1)) { // value is nil
jbe@23 813 // push string "NULL" to stack:
jbe/bsw@0 814 lua_pushliteral(L, "NULL");
jbe@23 815 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 816 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 817 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 818 } else if (lua_isstring(L, -1)) { // value is string or number
jbe/bsw@0 819 // NOTE: In this version of lua a number will be converted
jbe@23 820 // push output of "quote_string" method of database
jbe@23 821 // connection to stack:
jbe/bsw@0 822 lua_tostring(L, -1);
jbe/bsw@0 823 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 824 lua_pushvalue(L, 1);
jbe/bsw@0 825 lua_pushvalue(L, -3);
jbe/bsw@0 826 lua_call(L, 2, 1);
jbe@23 827 } else { // value is of other type
jbe@23 828 // throw error:
jbe/bsw@0 829 return luaL_error(L,
jbe/bsw@0 830 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 831 "or missing input_converter."
jbe/bsw@0 832 );
jbe/bsw@0 833 }
jbe@23 834 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 835 // remove raw-value:
jbe/bsw@0 836 lua_remove(L, -2);
jbe@23 837 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 838 }
jbe@23 839 // append final-value to buffer:
jbe/bsw@0 840 luaL_addvalue(&buf);
jbe/bsw@0 841 }
jbe/bsw@0 842 }
jbe@23 843 } else { // character is not special
jbe@23 844 // just copy character:
jbe/bsw@0 845 luaL_addchar(&buf, c);
jbe/bsw@0 846 }
jbe/bsw@0 847 }
jbe@23 848 // return string in buffer:
jbe/bsw@0 849 luaL_pushresult(&buf);
jbe/bsw@0 850 return 1;
jbe/bsw@0 851 }
jbe/bsw@0 852
jbe@23 853 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 854 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 855 // max number of columns in a database result:
jbe/bsw@0 856 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 857 // enum values for 'modes' array in C-function below:
jbe/bsw@0 858 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 859 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 860 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 861
jbe@23 862 // method "try_query" of database handles:
jbe/bsw@0 863 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 864 mondelefant_conn_t *conn;
jbe/bsw@0 865 int command_count;
jbe/bsw@0 866 int command_idx;
jbe/bsw@0 867 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 868 luaL_Buffer buf;
jbe/bsw@0 869 int sent_success;
jbe/bsw@0 870 PGresult *res;
jbe/bsw@0 871 int rows, cols, row, col;
jbe@23 872 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 873 conn = mondelefant_get_conn(L, 1);
jbe@23 874 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 875 command_count = lua_gettop(L) / 2;
jbe@23 876 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 877 lua_pushnil(L);
jbe@23 878 // throw error, if number of commands is too high:
jbe/bsw@0 879 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 880 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 881 }
jbe@23 882 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 883 luaL_buffinit(L, &buf);
jbe/bsw@0 884 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 885 int mode;
jbe/bsw@0 886 int mode_idx; // stack index of mode string
jbe/bsw@0 887 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 888 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 889 lua_pushvalue(L, 1);
jbe/bsw@0 890 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 891 lua_call(L, 2, 1);
jbe/bsw@0 892 luaL_addvalue(&buf);
jbe/bsw@0 893 luaL_addchar(&buf, ';');
jbe/bsw@0 894 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 895 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 896 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 897 } else {
jbe/bsw@0 898 const char *modestr;
jbe/bsw@0 899 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 900 if (!strcmp(modestr, "list")) {
jbe/bsw@0 901 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 902 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 903 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 904 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 905 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 906 } else {
jbe/bsw@0 907 return luaL_error(L, "Unknown query mode specified.");
jbe/bsw@0 908 }
jbe/bsw@0 909 }
jbe/bsw@0 910 modes[command_idx] = mode;
jbe/bsw@0 911 }
jbe/bsw@0 912 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 913 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 914 // call sql_tracer, if set:
jbe/bsw@0 915 lua_settop(L, 2);
jbe/bsw@0 916 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 917 if (lua_toboolean(L, 3)) {
jbe/bsw@0 918 lua_pushvalue(L, 1); // 4
jbe/bsw@0 919 lua_pushvalue(L, 2); // 5
jbe/bsw@0 920 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 921 }
jbe@23 922 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 923 // position 3.
jbe@23 924 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 925 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 926 // create preliminary result table:
jbe/bsw@0 927 lua_newtable(L); // results in table at stack position 4
jbe@23 928 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 929 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 930 int mode;
jbe/bsw@0 931 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 932 ExecStatusType pgstatus;
jbe@23 933 // fetch mode which was given for the command:
jbe/bsw@0 934 mode = modes[command_idx];
jbe@23 935 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 936 if (sent_success) {
jbe@23 937 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 938 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 939 res = PQgetResult(conn->pgconn);
jbe/bsw@0 940 if (command_idx >= command_count && !res) break;
jbe/bsw@0 941 if (res) {
jbe/bsw@0 942 pgstatus = PQresultStatus(res);
jbe/bsw@0 943 rows = PQntuples(res);
jbe/bsw@0 944 cols = PQnfields(res);
jbe/bsw@0 945 }
jbe/bsw@0 946 }
jbe@23 947 // handle errors:
jbe/bsw@0 948 if (
jbe/bsw@0 949 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 950 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 951 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 952 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 953 ) {
jbe/bsw@0 954 const char *command;
jbe/bsw@0 955 command = lua_tostring(L, 2);
jbe/bsw@0 956 lua_newtable(L); // 5
jbe/bsw@0 957 lua_getfield(L,
jbe/bsw@0 958 LUA_REGISTRYINDEX,
jbe/bsw@0 959 MONDELEFANT_ERROROBJECT_MT_REGKEY
jbe/bsw@0 960 );
jbe/bsw@0 961 lua_setmetatable(L, 5);
jbe/bsw@0 962 lua_pushvalue(L, 1);
jbe/bsw@0 963 lua_setfield(L, 5, "connection");
jbe/bsw@0 964 lua_pushinteger(L, command_idx + 1);
jbe/bsw@0 965 lua_setfield(L, 5, "command_number");
jbe/bsw@0 966 lua_pushvalue(L, 2);
jbe/bsw@0 967 lua_setfield(L, 5, "sql_command");
jbe/bsw@0 968 if (!res) {
jbe/bsw@0 969 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe/bsw@0 970 lua_setfield(L, 5, "code");
jbe/bsw@0 971 lua_pushliteral(L, "Received too few database result sets.");
jbe/bsw@0 972 lua_setfield(L, 5, "message");
jbe/bsw@0 973 } else if (command_idx >= command_count) {
jbe/bsw@0 974 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe/bsw@0 975 lua_setfield(L, 5, "code");
jbe/bsw@0 976 lua_pushliteral(L, "Received too many database result sets.");
jbe/bsw@0 977 lua_setfield(L, 5, "message");
jbe/bsw@0 978 } else if (
jbe/bsw@0 979 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe/bsw@0 980 ) {
jbe/bsw@0 981 const char *sqlstate;
jbe/bsw@0 982 const char *errmsg;
jbe/bsw@0 983 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe/bsw@0 984 lua_setfield(L, 5, "pg_severity");
jbe/bsw@0 985 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe/bsw@0 986 if (sqlstate) {
jbe/bsw@0 987 lua_pushstring(L, sqlstate);
jbe/bsw@0 988 lua_setfield(L, 5, "pg_sqlstate");
jbe/bsw@0 989 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe/bsw@0 990 lua_setfield(L, 5, "code");
jbe/bsw@0 991 } else {
jbe/bsw@0 992 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe/bsw@0 993 lua_setfield(L, 5, "code");
jbe/bsw@0 994 }
jbe/bsw@0 995 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe/bsw@0 996 if (errmsg) {
jbe/bsw@0 997 mondelefant_push_first_line(L, errmsg);
jbe/bsw@0 998 lua_setfield(L, 5, "message");
jbe/bsw@0 999 lua_pushstring(L, errmsg);
jbe/bsw@0 1000 lua_setfield(L, 5, "pg_message_primary");
jbe/bsw@0 1001 } else {
jbe/bsw@0 1002 lua_pushliteral(L,
jbe/bsw@0 1003 "Error while fetching result, but no error message given."
jbe/bsw@0 1004 );
jbe/bsw@0 1005 lua_setfield(L, 5, "message");
jbe/bsw@0 1006 }
jbe/bsw@0 1007 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe/bsw@0 1008 lua_setfield(L, 5, "pg_message_detail");
jbe/bsw@0 1009 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe/bsw@0 1010 lua_setfield(L, 5, "pg_message_hint");
jbe/bsw@0 1011 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe/bsw@0 1012 // byte offsets, as Lua 5.1 is not Unicode aware.
jbe/bsw@0 1013 {
jbe/bsw@0 1014 char *tmp;
jbe/bsw@0 1015 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe/bsw@0 1016 if (tmp) {
jbe/bsw@0 1017 int pos;
jbe/bsw@0 1018 pos = atoi(tmp) - 1;
jbe/bsw@0 1019 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe/bsw@0 1020 pos = utf8_position_to_byte(command, pos);
jbe/bsw@0 1021 }
jbe/bsw@0 1022 lua_pushinteger(L, pos + 1);
jbe/bsw@0 1023 lua_setfield(L, 5, "position");
jbe/bsw@0 1024 }
jbe/bsw@0 1025 }
jbe/bsw@0 1026 {
jbe/bsw@0 1027 const char *internal_query;
jbe/bsw@0 1028 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe/bsw@0 1029 lua_pushstring(L, internal_query);
jbe/bsw@0 1030 lua_setfield(L, 5, "pg_internal_query");
jbe/bsw@0 1031 char *tmp;
jbe/bsw@0 1032 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe/bsw@0 1033 if (tmp) {
jbe/bsw@0 1034 int pos;
jbe/bsw@0 1035 pos = atoi(tmp) - 1;
jbe/bsw@0 1036 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe/bsw@0 1037 pos = utf8_position_to_byte(internal_query, pos);
jbe/bsw@0 1038 }
jbe/bsw@0 1039 lua_pushinteger(L, pos + 1);
jbe/bsw@0 1040 lua_setfield(L, 5, "pg_internal_position");
jbe/bsw@0 1041 }
jbe/bsw@0 1042 }
jbe/bsw@0 1043 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe/bsw@0 1044 lua_setfield(L, 5, "pg_context");
jbe/bsw@0 1045 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe/bsw@0 1046 lua_setfield(L, 5, "pg_source_file");
jbe/bsw@0 1047 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe/bsw@0 1048 lua_setfield(L, 5, "pg_source_line");
jbe/bsw@0 1049 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe/bsw@0 1050 lua_setfield(L, 5, "pg_source_function");
jbe/bsw@0 1051 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe/bsw@0 1052 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe/bsw@0 1053 lua_setfield(L, 5, "code");
jbe/bsw@0 1054 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe/bsw@0 1055 lua_setfield(L, 5, "message");
jbe/bsw@0 1056 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1057 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe/bsw@0 1058 lua_setfield(L, 5, "code");
jbe/bsw@0 1059 lua_pushliteral(L, "Got more than one result row.");
jbe/bsw@0 1060 lua_setfield(L, 5, "message");
jbe/bsw@0 1061 } else {
jbe/bsw@0 1062 // should not happen
jbe/bsw@0 1063 abort();
jbe/bsw@0 1064 }
jbe/bsw@0 1065 if (res) {
jbe/bsw@0 1066 PQclear(res);
jbe/bsw@0 1067 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe/bsw@0 1068 }
jbe/bsw@0 1069 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1070 lua_pushvalue(L, 3);
jbe/bsw@0 1071 lua_pushvalue(L, 5);
jbe/bsw@0 1072 lua_call(L, 1, 0);
jbe/bsw@0 1073 }
jbe/bsw@0 1074 return 1;
jbe/bsw@0 1075 }
jbe@23 1076 // call "create_list" or "create_object" method of database handle,
jbe@23 1077 // result will be at stack position 5:
jbe/bsw@0 1078 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1079 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1080 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1081 lua_call(L, 1, 1); // 5
jbe/bsw@0 1082 } else {
jbe/bsw@0 1083 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1084 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1085 lua_call(L, 1, 1); // 5
jbe/bsw@0 1086 }
jbe@23 1087 // set "_column_info":
jbe@23 1088 lua_newtable(L); // 6
jbe/bsw@0 1089 for (col = 0; col < cols; col++) {
jbe/bsw@0 1090 lua_newtable(L); // 7
jbe@380 1091 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1092 lua_pushvalue(L, 8); // 9
jbe@380 1093 lua_pushvalue(L, 7); // 10
jbe@380 1094 lua_rawset(L, 6);
jbe/bsw@0 1095 lua_setfield(L, 7, "field_name");
jbe@380 1096 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1097 {
jbe/bsw@0 1098 Oid tmp;
jbe/bsw@0 1099 tmp = PQftable(res, col);
jbe/bsw@0 1100 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1101 else lua_pushinteger(L, tmp);
jbe/bsw@0 1102 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1103 }
jbe/bsw@0 1104 {
jbe/bsw@0 1105 int tmp;
jbe/bsw@0 1106 tmp = PQftablecol(res, col);
jbe/bsw@0 1107 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1108 else lua_pushinteger(L, tmp);
jbe/bsw@0 1109 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1110 }
jbe/bsw@0 1111 {
jbe/bsw@0 1112 Oid tmp;
jbe/bsw@0 1113 tmp = PQftype(res, col);
jbe/bsw@0 1114 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1115 lua_pushinteger(L, tmp);
jbe/bsw@0 1116 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1117 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1118 lua_setfield(L, 7, "type");
jbe/bsw@0 1119 }
jbe/bsw@0 1120 {
jbe/bsw@0 1121 int tmp;
jbe/bsw@0 1122 tmp = PQfmod(res, col);
jbe/bsw@0 1123 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1124 else lua_pushinteger(L, tmp);
jbe/bsw@0 1125 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1126 }
jbe/bsw@0 1127 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1128 }
jbe@23 1129 lua_setfield(L, 5, "_column_info");
jbe@23 1130 // set "_rows_affected":
jbe/bsw@0 1131 {
jbe/bsw@0 1132 char *tmp;
jbe/bsw@0 1133 tmp = PQcmdTuples(res);
jbe/bsw@0 1134 if (tmp[0]) {
jbe/bsw@0 1135 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1136 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1137 }
jbe/bsw@0 1138 }
jbe@23 1139 // set "_oid":
jbe/bsw@0 1140 {
jbe/bsw@0 1141 Oid tmp;
jbe/bsw@0 1142 tmp = PQoidValue(res);
jbe/bsw@0 1143 if (tmp != InvalidOid) {
jbe/bsw@0 1144 lua_pushinteger(L, tmp);
jbe/bsw@0 1145 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1146 }
jbe/bsw@0 1147 }
jbe@23 1148 // copy data as strings or nil, while performing binary unescaping
jbe@23 1149 // automatically:
jbe/bsw@0 1150 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1151 for (row = 0; row < rows; row++) {
jbe/bsw@0 1152 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1153 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1154 lua_call(L, 1, 1); // 6
jbe/bsw@0 1155 for (col = 0; col < cols; col++) {
jbe/bsw@0 1156 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1157 lua_pushnil(L);
jbe/bsw@0 1158 } else if (binary[col]) {
jbe/bsw@0 1159 size_t binlen;
jbe/bsw@0 1160 char *binval;
jbe/bsw@0 1161 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1162 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1163 );
jbe/bsw@0 1164 if (!binval) {
jbe/bsw@0 1165 return luaL_error(L,
jbe/bsw@0 1166 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1167 );
jbe/bsw@0 1168 }
jbe/bsw@0 1169 lua_pushlstring(L, binval, binlen);
jbe/bsw@0 1170 PQfreemem(binval);
jbe/bsw@0 1171 } else {
jbe/bsw@0 1172 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1173 }
jbe/bsw@0 1174 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1175 }
jbe/bsw@0 1176 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1177 }
jbe/bsw@0 1178 } else if (rows == 1) {
jbe/bsw@0 1179 for (col = 0; col < cols; col++) {
jbe/bsw@0 1180 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1181 lua_pushnil(L);
jbe/bsw@0 1182 } else if (binary[col]) {
jbe/bsw@0 1183 size_t binlen;
jbe/bsw@0 1184 char *binval;
jbe/bsw@0 1185 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1186 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1187 );
jbe/bsw@0 1188 if (!binval) {
jbe/bsw@0 1189 return luaL_error(L,
jbe/bsw@0 1190 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1191 );
jbe/bsw@0 1192 }
jbe/bsw@0 1193 lua_pushlstring(L, binval, binlen);
jbe/bsw@0 1194 PQfreemem(binval);
jbe/bsw@0 1195 } else {
jbe/bsw@0 1196 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1197 }
jbe/bsw@0 1198 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1199 }
jbe/bsw@0 1200 } else {
jbe/bsw@0 1201 // no row in optrow mode
jbe/bsw@0 1202 lua_pop(L, 1);
jbe/bsw@0 1203 lua_pushnil(L);
jbe/bsw@0 1204 }
jbe@23 1205 // save result in result list:
jbe/bsw@0 1206 lua_rawseti(L, 4, command_idx+1);
jbe@23 1207 // extra assertion:
jbe/bsw@0 1208 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1209 // free memory acquired by libpq:
jbe/bsw@0 1210 PQclear(res);
jbe/bsw@0 1211 }
jbe/bsw@0 1212 // trace callback at stack position 3
jbe/bsw@0 1213 // result at stack position 4 (top of stack)
jbe@23 1214 // if a trace callback is existent, then call:
jbe/bsw@0 1215 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1216 lua_pushvalue(L, 3);
jbe/bsw@0 1217 lua_call(L, 0, 0);
jbe/bsw@0 1218 }
jbe@23 1219 // put result at stack position 3:
jbe@23 1220 lua_replace(L, 3);
jbe@23 1221 // get output converter to stack position 4:
jbe@23 1222 lua_getfield(L, 1, "output_converter");
jbe@374 1223 // get mutability state saver to stack position 5:
jbe@375 1224 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1225 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1226 lua_replace(L, -2);
jbe@23 1227 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1228 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1229 int mode;
jbe/bsw@0 1230 mode = modes[command_idx];
jbe@374 1231 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1232 if (lua_toboolean(L, 6)) {
jbe@374 1233 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@64 1234 #if LUA_VERSION_NUM >= 502
jbe@374 1235 cols = lua_rawlen(L, 7);
jbe@64 1236 #else
jbe@374 1237 cols = lua_objlen(L, 7);
jbe@64 1238 #endif
jbe/bsw@0 1239 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@64 1240 #if LUA_VERSION_NUM >= 502
jbe@374 1241 rows = lua_rawlen(L, 6);
jbe@64 1242 #else
jbe@374 1243 rows = lua_objlen(L, 6);
jbe@64 1244 #endif
jbe/bsw@0 1245 for (row = 0; row < rows; row++) {
jbe@374 1246 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1247 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1248 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1249 for (col = 0; col < cols; col++) {
jbe@375 1250 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1251 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1252 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1253 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1254 lua_pushvalue(L, 1); // connection
jbe@374 1255 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1256 lua_pushvalue(L, 11); // this column info
jbe@375 1257 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1258 } else {
jbe@375 1259 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1260 }
jbe@375 1261 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1262 lua_pushvalue(L, 12); // copy of field name
jbe@375 1263 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1264 lua_pushvalue(L, 13); // copy of value
jbe@375 1265 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1266 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1267 }
jbe@375 1268 lua_pushvalue(L, 13); // 14
jbe@374 1269 lua_rawseti(L, 8, col+1);
jbe@374 1270 lua_rawset(L, 9);
jbe@374 1271 lua_settop(L, 9);
jbe/bsw@0 1272 }
jbe@374 1273 lua_settop(L, 7);
jbe/bsw@0 1274 }
jbe/bsw@0 1275 } else {
jbe@374 1276 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1277 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1278 for (col = 0; col < cols; col++) {
jbe@375 1279 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1280 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1281 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1282 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1283 lua_pushvalue(L, 1); // connection
jbe@374 1284 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1285 lua_pushvalue(L, 10); // this column info
jbe@375 1286 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1287 } else {
jbe@375 1288 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1289 }
jbe@375 1290 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1291 lua_pushvalue(L, 11); // copy of field name
jbe@375 1292 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1293 lua_pushvalue(L, 12); // copy of value
jbe@375 1294 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1295 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1296 }
jbe@375 1297 lua_pushvalue(L, 12); // 13
jbe@374 1298 lua_rawseti(L, 6, col+1);
jbe@374 1299 lua_rawset(L, 8);
jbe@374 1300 lua_settop(L, 8);
jbe/bsw@0 1301 }
jbe/bsw@0 1302 }
jbe/bsw@0 1303 }
jbe@374 1304 lua_settop(L, 5);
jbe/bsw@0 1305 }
jbe@23 1306 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1307 lua_settop(L, 3);
jbe/bsw@0 1308 lua_pushnil(L);
jbe/bsw@0 1309 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1310 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1311 }
jbe/bsw@0 1312 return command_count+1;
jbe/bsw@0 1313 }
jbe/bsw@0 1314
jbe@23 1315 // method "escalate" of error objects:
jbe/bsw@0 1316 static int mondelefant_errorobject_escalate(lua_State *L) {
jbe@23 1317 // check, if we may throw an error object instead of an error string:
jbe/bsw@0 1318 lua_settop(L, 1);
jbe/bsw@0 1319 lua_getfield(L, 1, "connection"); // 2
jbe/bsw@0 1320 lua_getfield(L, 2, "error_objects"); // 3
jbe/bsw@0 1321 if (lua_toboolean(L, 3)) {
jbe@23 1322 // throw error object:
jbe/bsw@0 1323 lua_settop(L, 1);
jbe/bsw@0 1324 return lua_error(L);
jbe/bsw@0 1325 } else {
jbe@23 1326 // throw error string:
jbe/bsw@0 1327 lua_getfield(L, 1, "message"); // 4
jbe/bsw@0 1328 if (lua_isnil(L, 4)) {
jbe/bsw@0 1329 return luaL_error(L, "No error message given for escalation.");
jbe/bsw@0 1330 }
jbe/bsw@0 1331 return lua_error(L);
jbe/bsw@0 1332 }
jbe/bsw@0 1333 }
jbe/bsw@0 1334
jbe@23 1335 // method "is_kind_of" of error objects:
jbe/bsw@0 1336 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe/bsw@0 1337 lua_settop(L, 2);
jbe/bsw@0 1338 lua_getfield(L, 1, "code"); // 3
jbe/bsw@0 1339 if (lua_isstring(L, 3)) {
jbe/bsw@0 1340 lua_pushboolean(L,
jbe/bsw@0 1341 mondelefant_check_error_class(
jbe/bsw@0 1342 lua_tostring(L, 3), luaL_checkstring(L, 2)
jbe/bsw@0 1343 )
jbe/bsw@0 1344 );
jbe/bsw@0 1345 } else {
jbe/bsw@0 1346 // only happens for errors where code is not set
jbe/bsw@0 1347 lua_pushboolean(L, 0);
jbe/bsw@0 1348 }
jbe/bsw@0 1349 return 1;
jbe/bsw@0 1350 }
jbe/bsw@0 1351
jbe@23 1352 // method "query" of database handles:
jbe/bsw@0 1353 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1354 int argc;
jbe@23 1355 // count number of arguments:
jbe/bsw@0 1356 argc = lua_gettop(L);
jbe@23 1357 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1358 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1359 lua_insert(L, 1);
jbe@23 1360 // call "try_query" method:
jbe@23 1361 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1362 // check, if error occurred:
jbe@23 1363 if (lua_toboolean(L, 1)) {
jbe@23 1364 // invoke escalate method of error object:
jbe/bsw@0 1365 lua_pushcfunction(L, mondelefant_errorobject_escalate);
jbe@23 1366 lua_pushvalue(L, 1);
jbe/bsw@0 1367 lua_call(L, 1, 0); // will raise an error
jbe/bsw@0 1368 return 0; // should not be executed
jbe/bsw@0 1369 } else {
jbe@23 1370 // return everything but nil error object:
jbe@23 1371 return lua_gettop(L) - 1;
jbe/bsw@0 1372 }
jbe/bsw@0 1373 }
jbe/bsw@0 1374
jbe@23 1375 // library function "set_class":
jbe/bsw@0 1376 static int mondelefant_set_class(lua_State *L) {
jbe@23 1377 // ensure that first argument is a database result list/object:
jbe/bsw@0 1378 lua_settop(L, 2);
jbe/bsw@0 1379 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1380 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1381 #if LUA_VERSION_NUM >= 502
jbe@64 1382 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@64 1383 #else
jbe/bsw@0 1384 luaL_argcheck(L, lua_equal(L, 3, 4), 1, "not a database result");
jbe@64 1385 #endif
jbe@23 1386 // ensure that second argument is a database class (model):
jbe/bsw@0 1387 lua_settop(L, 2);
jbe/bsw@0 1388 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1389 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1390 #if LUA_VERSION_NUM >= 502
jbe@64 1391 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@64 1392 #else
jbe/bsw@0 1393 luaL_argcheck(L, lua_equal(L, 3, 4), 2, "not a database class");
jbe@64 1394 #endif
jbe@23 1395 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1396 lua_settop(L, 2);
jbe/bsw@0 1397 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1398 lua_setfield(L, 1, "_class");
jbe@23 1399 // test, if database result is a list (and not a single object):
jbe/bsw@0 1400 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1401 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1402 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1403 int i;
jbe@23 1404 // set attribute "_class" of all elements to given class:
jbe@64 1405 #if LUA_VERSION_NUM >= 502
jbe@64 1406 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe@64 1407 #else
jbe/bsw@0 1408 for (i=0; i < lua_objlen(L, 1); i++) {
jbe@64 1409 #endif
jbe/bsw@0 1410 lua_settop(L, 2);
jbe/bsw@0 1411 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1412 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1413 lua_setfield(L, 3, "_class");
jbe/bsw@0 1414 }
jbe/bsw@0 1415 }
jbe@23 1416 // return first argument:
jbe/bsw@0 1417 lua_settop(L, 1);
jbe/bsw@0 1418 return 1;
jbe/bsw@0 1419 }
jbe/bsw@0 1420
jbe@23 1421 // library function "new_class":
jbe/bsw@0 1422 static int mondelefant_new_class(lua_State *L) {
jbe@23 1423 // use first argument as template or create new table:
jbe/bsw@0 1424 lua_settop(L, 1);
jbe/bsw@0 1425 if (!lua_toboolean(L, 1)) {
jbe/bsw@0 1426 lua_settop(L, 0);
jbe/bsw@0 1427 lua_newtable(L); // 1
jbe/bsw@0 1428 }
jbe@23 1429 // set meta-table for database classes (models):
jbe/bsw@0 1430 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe/bsw@0 1431 lua_setmetatable(L, 1);
jbe@23 1432 // check, if "prototype" attribute is not set:
jbe/bsw@0 1433 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1434 lua_rawget(L, 1); // 2
jbe/bsw@0 1435 if (!lua_toboolean(L, 2)) {
jbe@23 1436 // set "prototype" attribute to default prototype:
jbe/bsw@0 1437 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1438 lua_getfield(L,
jbe/bsw@0 1439 LUA_REGISTRYINDEX,
jbe/bsw@0 1440 MONDELEFANT_CLASS_PROTO_REGKEY
jbe/bsw@0 1441 ); // 4
jbe/bsw@0 1442 lua_rawset(L, 1);
jbe/bsw@0 1443 }
jbe@23 1444 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1445 lua_settop(L, 1);
jbe/bsw@0 1446 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1447 lua_rawget(L, 1); // 2
jbe/bsw@0 1448 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1449 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1450 lua_newtable(L); // 4
jbe/bsw@0 1451 lua_rawset(L, 1);
jbe/bsw@0 1452 }
jbe@23 1453 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1454 lua_settop(L, 1);
jbe/bsw@0 1455 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1456 lua_rawget(L, 1); // 2
jbe/bsw@0 1457 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1458 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1459 lua_newtable(L); // 4
jbe/bsw@0 1460 lua_rawset(L, 1);
jbe/bsw@0 1461 }
jbe@23 1462 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1463 lua_settop(L, 1);
jbe/bsw@0 1464 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1465 lua_rawget(L, 1); // 2
jbe/bsw@0 1466 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1467 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1468 lua_newtable(L); // 4
jbe/bsw@0 1469 lua_rawset(L, 1);
jbe/bsw@0 1470 }
jbe@23 1471 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1472 lua_settop(L, 1);
jbe/bsw@0 1473 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1474 lua_rawget(L, 1); // 2
jbe/bsw@0 1475 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1476 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1477 lua_newtable(L); // 4
jbe/bsw@0 1478 lua_rawset(L, 1);
jbe/bsw@0 1479 }
jbe@23 1480 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1481 lua_settop(L, 1);
jbe/bsw@0 1482 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1483 lua_rawget(L, 1); // 2
jbe/bsw@0 1484 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1485 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1486 lua_newtable(L); // 4
jbe/bsw@0 1487 lua_rawset(L, 1);
jbe/bsw@0 1488 }
jbe@23 1489 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1490 lua_settop(L, 1);
jbe/bsw@0 1491 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1492 lua_rawget(L, 1); // 2
jbe/bsw@0 1493 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1494 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1495 lua_newtable(L); // 4
jbe/bsw@0 1496 lua_rawset(L, 1);
jbe/bsw@0 1497 }
jbe@23 1498 // return table:
jbe/bsw@0 1499 lua_settop(L, 1);
jbe/bsw@0 1500 return 1;
jbe/bsw@0 1501 }
jbe/bsw@0 1502
jbe@23 1503 // method "get_reference" of classes (models):
jbe/bsw@0 1504 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1505 lua_settop(L, 2);
jbe/bsw@0 1506 while (lua_toboolean(L, 1)) {
jbe@23 1507 // get "references" table:
jbe/bsw@0 1508 lua_getfield(L, 1, "references"); // 3
jbe@23 1509 // perform lookup:
jbe/bsw@0 1510 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1511 lua_gettable(L, 3); // 4
jbe@23 1512 // return result, if lookup was successful:
jbe/bsw@0 1513 if (!lua_isnil(L, 4)) return 1;
jbe@23 1514 // replace current table by its prototype:
jbe/bsw@0 1515 lua_settop(L, 2);
jbe/bsw@0 1516 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1517 lua_rawget(L, 1); // 3
jbe/bsw@0 1518 lua_replace(L, 1);
jbe/bsw@0 1519 }
jbe@23 1520 // return nothing:
jbe/bsw@0 1521 return 0;
jbe/bsw@0 1522 }
jbe/bsw@0 1523
jbe@23 1524 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1525 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1526 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1527 }
jbe/bsw@0 1528
jbe@23 1529 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1530 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1531 lua_settop(L, 2);
jbe/bsw@0 1532 while (lua_toboolean(L, 1)) {
jbe@23 1533 // get "foreign_keys" table:
jbe/bsw@0 1534 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1535 // perform lookup:
jbe/bsw@0 1536 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1537 lua_gettable(L, 3); // 4
jbe@23 1538 // return result, if lookup was successful:
jbe/bsw@0 1539 if (!lua_isnil(L, 4)) return 1;
jbe@23 1540 // replace current table by its prototype:
jbe/bsw@0 1541 lua_settop(L, 2);
jbe/bsw@0 1542 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1543 lua_rawget(L, 1); // 3
jbe/bsw@0 1544 lua_replace(L, 1);
jbe/bsw@0 1545 }
jbe@23 1546 // return nothing:
jbe/bsw@0 1547 return 0;
jbe/bsw@0 1548 }
jbe/bsw@0 1549
jbe@23 1550 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1551 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1552 const char *result_type;
jbe@23 1553 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1554 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1555 return 0;
jbe/bsw@0 1556 }
jbe@384 1557 // value of "_class" attribute or default class on stack position 3:
jbe@23 1558 lua_settop(L, 2);
jbe/bsw@0 1559 lua_getfield(L, 1, "_class"); // 3
jbe/bsw@0 1560 if (!lua_toboolean(L, 3)) {
jbe/bsw@0 1561 lua_settop(L, 2);
jbe/bsw@0 1562 lua_getfield(L,
jbe/bsw@0 1563 LUA_REGISTRYINDEX,
jbe/bsw@0 1564 MONDELEFANT_CLASS_PROTO_REGKEY
jbe/bsw@0 1565 ); // 3
jbe/bsw@0 1566 }
jbe@23 1567 // get value of "_type" attribute:
jbe/bsw@0 1568 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1569 result_type = lua_tostring(L, 4);
jbe@23 1570 // different lookup for lists and objects:
jbe@23 1571 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1572 lua_settop(L, 3);
jbe@384 1573 // try inherited attributes, methods or getter functions:
jbe@383 1574 lua_pushvalue(L, 3); // 4
jbe@383 1575 while (lua_toboolean(L, 4)) {
jbe@383 1576 lua_getfield(L, 4, "object"); // 5
jbe@383 1577 lua_pushvalue(L, 2); // 6
jbe@383 1578 lua_gettable(L, 5); // 6
jbe@383 1579 if (!lua_isnil(L, 6)) return 1;
jbe@383 1580 lua_settop(L, 4);
jbe@383 1581 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1582 lua_pushvalue(L, 2); // 6
jbe@383 1583 lua_gettable(L, 5); // 6
jbe@383 1584 if (lua_toboolean(L, 6)) {
jbe@383 1585 lua_pushvalue(L, 1); // 7
jbe@383 1586 lua_call(L, 1, 1); // 6
jbe/bsw@0 1587 return 1;
jbe/bsw@0 1588 }
jbe@383 1589 lua_settop(L, 4);
jbe@383 1590 lua_pushliteral(L, "prototype"); // 5
jbe@383 1591 lua_rawget(L, 4); // 5
jbe@383 1592 lua_replace(L, 4);
jbe/bsw@0 1593 }
jbe@383 1594 lua_settop(L, 3);
jbe/bsw@0 1595 // try primary keys of referenced objects:
jbe/bsw@0 1596 lua_pushcfunction(L,
jbe/bsw@0 1597 mondelefant_class_get_foreign_key_reference_name
jbe@383 1598 ); // 4
jbe@383 1599 lua_pushvalue(L, 3); // 5
jbe@383 1600 lua_pushvalue(L, 2); // 6
jbe@383 1601 lua_call(L, 2, 1); // 4
jbe@383 1602 if (!lua_isnil(L, 4)) {
jbe@383 1603 // reference name at stack position 4
jbe@383 1604 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1605 lua_pushvalue(L, 3); // 6
jbe@383 1606 lua_pushvalue(L, 4); // 7
jbe@383 1607 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1608 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1609 lua_getfield(L, 5, "ref"); // 7
jbe@383 1610 lua_gettable(L, 6); // 7
jbe@383 1611 if (!lua_isnil(L, 7)) {
jbe@383 1612 if (lua_toboolean(L, 7)) {
jbe@383 1613 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1614 if (lua_isnil(L, 8)) {
jbe/bsw@0 1615 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1616 }
jbe@383 1617 lua_gettable(L, 7); // 8
jbe/bsw@0 1618 } else {
jbe/bsw@0 1619 lua_pushnil(L);
jbe/bsw@0 1620 }
jbe/bsw@0 1621 return 1;
jbe/bsw@0 1622 }
jbe/bsw@0 1623 }
jbe@383 1624 lua_settop(L, 3);
jbe@383 1625 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1626 // try normal data field info:
jbe@383 1627 lua_pushvalue(L, 2); // 5
jbe@383 1628 lua_gettable(L, 4); // 5
jbe@383 1629 if (!lua_isnil(L, 5)) return 1;
jbe@383 1630 lua_settop(L, 4); // keep _data table on stack
jbe/bsw@0 1631 // try cached referenced object (or cached NULL reference):
jbe@383 1632 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1633 lua_pushvalue(L, 2); // 6
jbe@383 1634 lua_gettable(L, 5); // 6
jbe@383 1635 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1636 lua_pushnil(L);
jbe/bsw@0 1637 return 1;
jbe@383 1638 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1639 return 1;
jbe/bsw@0 1640 }
jbe@383 1641 lua_settop(L, 4);
jbe/bsw@0 1642 // try to load a referenced object:
jbe@383 1643 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1644 lua_pushvalue(L, 3); // 6
jbe@383 1645 lua_pushvalue(L, 2); // 7
jbe@383 1646 lua_call(L, 2, 1); // 5
jbe@383 1647 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1648 lua_settop(L, 2);
jbe/bsw@0 1649 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1650 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1651 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1652 lua_call(L, 2, 0);
jbe/bsw@0 1653 lua_settop(L, 2);
jbe/bsw@0 1654 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1655 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1656 lua_gettable(L, 3); // 4
jbe/bsw@0 1657 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1658 return 1;
jbe/bsw@0 1659 }
jbe@383 1660 lua_settop(L, 4);
jbe@383 1661 // try proxy access to document in special column:
jbe@383 1662 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1663 if (lua_toboolean(L, 5)) {
jbe@383 1664 lua_gettable(L, 4); // 5
jbe@383 1665 if (!lua_isnil(L, 5)) {
jbe@383 1666 lua_pushvalue(L, 2); // 6
jbe@383 1667 lua_gettable(L, 5); // 6
jbe@383 1668 if (!lua_isnil(L, 6)) return 1;
jbe@383 1669 }
jbe@383 1670 }
jbe/bsw@0 1671 return 0;
jbe@23 1672 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1673 lua_settop(L, 3);
jbe/bsw@0 1674 // try inherited list attributes or methods:
jbe/bsw@0 1675 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1676 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1677 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1678 lua_gettable(L, 4); // 5
jbe/bsw@0 1679 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1680 lua_settop(L, 3);
jbe/bsw@0 1681 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1682 lua_rawget(L, 3); // 4
jbe/bsw@0 1683 lua_replace(L, 3);
jbe/bsw@0 1684 }
jbe/bsw@0 1685 }
jbe@23 1686 // return nothing:
jbe/bsw@0 1687 return 0;
jbe/bsw@0 1688 }
jbe/bsw@0 1689
jbe@23 1690 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1691 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1692 const char *result_type;
jbe@23 1693 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1694 lua_settop(L, 3);
jbe/bsw@0 1695 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1696 lua_rawset(L, 1);
jbe/bsw@0 1697 return 1;
jbe/bsw@0 1698 }
jbe@384 1699 // value of "_class" attribute or default class on stack position 4:
jbe@384 1700 lua_settop(L, 3);
jbe/bsw@0 1701 lua_getfield(L, 1, "_class"); // 4
jbe/bsw@0 1702 if (!lua_toboolean(L, 4)) {
jbe/bsw@0 1703 lua_settop(L, 3);
jbe/bsw@0 1704 lua_getfield(L,
jbe/bsw@0 1705 LUA_REGISTRYINDEX,
jbe/bsw@0 1706 MONDELEFANT_CLASS_PROTO_REGKEY
jbe/bsw@0 1707 ); // 4
jbe/bsw@0 1708 }
jbe@23 1709 // get value of "_type" attribute:
jbe/bsw@0 1710 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1711 result_type = lua_tostring(L, 5);
jbe@378 1712 // distinguish between lists and objects:
jbe@378 1713 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1714 lua_settop(L, 4);
jbe@378 1715 // try object setter functions:
jbe@384 1716 lua_pushvalue(L, 4); // 5
jbe@384 1717 while (lua_toboolean(L, 5)) {
jbe@384 1718 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1719 lua_pushvalue(L, 2); // 7
jbe@384 1720 lua_gettable(L, 6); // 7
jbe@384 1721 if (lua_toboolean(L, 7)) {
jbe@384 1722 lua_pushvalue(L, 1); // 8
jbe@384 1723 lua_pushvalue(L, 3); // 9
jbe@378 1724 lua_call(L, 2, 0);
jbe@378 1725 return 0;
jbe@378 1726 }
jbe@384 1727 lua_settop(L, 5);
jbe@384 1728 lua_pushliteral(L, "prototype"); // 6
jbe@384 1729 lua_rawget(L, 5); // 6
jbe@384 1730 lua_replace(L, 5);
jbe@378 1731 }
jbe@384 1732 lua_settop(L, 4);
jbe@384 1733 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1734 // check, if a object reference is changed:
jbe@384 1735 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1736 lua_pushvalue(L, 4); // 7
jbe@384 1737 lua_pushvalue(L, 2); // 8
jbe@384 1738 lua_call(L, 2, 1); // 6
jbe@384 1739 if (!lua_isnil(L, 6)) {
jbe/bsw@0 1740 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1741 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1742 lua_pushvalue(L, 2); // 8
jbe@384 1743 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1744 else lua_pushvalue(L, 3); // 9
jbe@384 1745 lua_settable(L, 7);
jbe@384 1746 lua_settop(L, 6);
jbe/bsw@0 1747 // delete referencing key from _data table:
jbe@384 1748 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1749 if (lua_isnil(L, 7)) {
jbe/bsw@0 1750 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1751 }
jbe@384 1752 lua_pushvalue(L, 7); // 8
jbe@384 1753 lua_pushnil(L); // 9
jbe@384 1754 lua_settable(L, 5);
jbe@384 1755 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1756 lua_pushvalue(L, 7); // 9
jbe@384 1757 lua_pushboolean(L, 1); // 10
jbe@384 1758 lua_settable(L, 8);
jbe@384 1759 return 0;
jbe@384 1760 }
jbe@384 1761 lua_settop(L, 5);
jbe@384 1762 // check proxy access to document in special column:
jbe@384 1763 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1764 if (lua_toboolean(L, 6)) {
jbe@384 1765 lua_getfield(L, 1, "_column_info"); // 7
jbe@384 1766 lua_pushvalue(L, 2); // 8
jbe@384 1767 lua_gettable(L, 7); // 8
jbe@384 1768 if (lua_toboolean(L, 8)) {
jbe@384 1769 lua_settop(L, 6);
jbe@384 1770 lua_gettable(L, 5); // 6
jbe@384 1771 if (lua_isnil(L, 6)) {
jbe@384 1772 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1773 }
jbe@384 1774 lua_pushvalue(L, 2); // 7
jbe@384 1775 lua_pushvalue(L, 3); // 8
jbe@384 1776 lua_settable(L, 6);
jbe@384 1777 return 0;
jbe@384 1778 }
jbe@384 1779 }
jbe@384 1780 lua_settop(L, 5);
jbe@384 1781 // store value in data field info:
jbe@384 1782 lua_pushvalue(L, 2); // 6
jbe@384 1783 lua_pushvalue(L, 3); // 7
jbe@384 1784 lua_settable(L, 5);
jbe@384 1785 lua_settop(L, 4);
jbe@384 1786 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1787 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1788 lua_pushvalue(L, 2); // 6
jbe@384 1789 lua_pushboolean(L, 1); // 7
jbe@384 1790 lua_settable(L, 5);
jbe@384 1791 lua_settop(L, 4);
jbe@384 1792 // reset reference cache, if neccessary:
jbe@384 1793 lua_pushcfunction(L,
jbe@384 1794 mondelefant_class_get_foreign_key_reference_name
jbe@384 1795 ); // 5
jbe@384 1796 lua_pushvalue(L, 4); // 6
jbe@384 1797 lua_pushvalue(L, 2); // 7
jbe@384 1798 lua_call(L, 2, 1); // 5
jbe@384 1799 if (!lua_isnil(L, 5)) {
jbe@384 1800 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1801 lua_pushvalue(L, 5); // 7
jbe@382 1802 lua_pushnil(L); // 8
jbe@382 1803 lua_settable(L, 6);
jbe/bsw@0 1804 }
jbe/bsw@0 1805 return 0;
jbe@23 1806 } else { // non-objects (i.e. lists)
jbe@23 1807 // perform rawset:
jbe/bsw@0 1808 lua_settop(L, 3);
jbe/bsw@0 1809 lua_rawset(L, 1);
jbe/bsw@0 1810 return 0;
jbe/bsw@0 1811 }
jbe/bsw@0 1812 }
jbe/bsw@0 1813
jbe@23 1814 // meta-method "__index" of classes (models):
jbe/bsw@0 1815 static int mondelefant_class_index(lua_State *L) {
jbe@23 1816 // perform lookup in prototype:
jbe/bsw@0 1817 lua_settop(L, 2);
jbe/bsw@0 1818 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1819 lua_rawget(L, 1); // 3
jbe/bsw@0 1820 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1821 lua_gettable(L, 3); // 4
jbe/bsw@0 1822 return 1;
jbe/bsw@0 1823 }
jbe/bsw@0 1824
jbe@23 1825 // registration information for functions of library:
jbe/bsw@0 1826 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1827 {"connect", mondelefant_connect},
jbe/bsw@0 1828 {"set_class", mondelefant_set_class},
jbe/bsw@0 1829 {"new_class", mondelefant_new_class},
jbe/bsw@0 1830 {NULL, NULL}
jbe/bsw@0 1831 };
jbe/bsw@0 1832
jbe@23 1833 // registration information for meta-methods of database connections:
jbe/bsw@0 1834 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1835 {"__gc", mondelefant_conn_free},
jbe/bsw@0 1836 {"__index", mondelefant_conn_index},
jbe/bsw@0 1837 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 1838 {NULL, NULL}
jbe/bsw@0 1839 };
jbe/bsw@0 1840
jbe@23 1841 // registration information for methods of database connections:
jbe/bsw@0 1842 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 1843 {"close", mondelefant_conn_close},
jbe/bsw@0 1844 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 1845 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@393 1846 {"wait", mondelefant_conn_wait},
jbe/bsw@0 1847 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 1848 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 1849 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 1850 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 1851 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 1852 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 1853 {"query", mondelefant_conn_query},
jbe/bsw@0 1854 {NULL, NULL}
jbe/bsw@0 1855 };
jbe/bsw@0 1856
jbe@23 1857 // registration information for meta-methods of error objects:
jbe/bsw@0 1858 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe/bsw@0 1859 {NULL, NULL}
jbe/bsw@0 1860 };
jbe/bsw@0 1861
jbe@23 1862 // registration information for methods of error objects:
jbe/bsw@0 1863 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe/bsw@0 1864 {"escalate", mondelefant_errorobject_escalate},
jbe/bsw@0 1865 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 1866 {NULL, NULL}
jbe/bsw@0 1867 };
jbe/bsw@0 1868
jbe@23 1869 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 1870 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 1871 {"__index", mondelefant_result_index},
jbe/bsw@0 1872 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 1873 {NULL, NULL}
jbe/bsw@0 1874 };
jbe/bsw@0 1875
jbe@23 1876 // registration information for methods of database result lists/objects:
jbe/bsw@0 1877 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 1878 {"__index", mondelefant_class_index},
jbe/bsw@0 1879 {NULL, NULL}
jbe/bsw@0 1880 };
jbe/bsw@0 1881
jbe@23 1882 // registration information for methods of classes (models):
jbe/bsw@0 1883 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 1884 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 1885 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 1886 {"get_foreign_key_reference_name",
jbe/bsw@0 1887 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 1888 {NULL, NULL}
jbe/bsw@0 1889 };
jbe/bsw@0 1890
jbe@23 1891 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 1892 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 1893 {NULL, NULL}
jbe/bsw@0 1894 };
jbe/bsw@0 1895
jbe@23 1896 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 1897 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 1898 {NULL, NULL}
jbe/bsw@0 1899 };
jbe/bsw@0 1900
jbe@23 1901 // luaopen function to initialize/register library:
jbe/bsw@0 1902 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 1903 lua_settop(L, 0);
jbe/bsw@0 1904 lua_newtable(L); // module at stack position 1
jbe@64 1905 #if LUA_VERSION_NUM >= 502
jbe@64 1906 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe@64 1907 #else
jbe/bsw@0 1908 luaL_register(L, NULL, mondelefant_module_functions);
jbe@64 1909 #endif
jbe/bsw@0 1910
jbe/bsw@0 1911 lua_pushvalue(L, 1); // 2
jbe/bsw@0 1912 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 1913
jbe/bsw@0 1914 lua_newtable(L); // 2
jbe/bsw@0 1915 // NOTE: only PostgreSQL is supported yet:
jbe@64 1916 #if LUA_VERSION_NUM >= 502
jbe@64 1917 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe@64 1918 #else
jbe/bsw@0 1919 luaL_register(L, NULL, mondelefant_conn_methods);
jbe@64 1920 #endif
jbe/bsw@0 1921 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 1922 lua_newtable(L); // 2
jbe/bsw@0 1923 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 1924
jbe/bsw@0 1925 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 1926 #if LUA_VERSION_NUM >= 502
jbe@64 1927 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe@64 1928 #else
jbe/bsw@0 1929 luaL_register(L, NULL, mondelefant_conn_mt_functions);
jbe@64 1930 #endif
jbe/bsw@0 1931 lua_settop(L, 1);
jbe/bsw@0 1932 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 1933 #if LUA_VERSION_NUM >= 502
jbe@64 1934 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe@64 1935 #else
jbe/bsw@0 1936 luaL_register(L, NULL, mondelefant_result_mt_functions);
jbe@64 1937 #endif
jbe/bsw@0 1938 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 1939 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 1940 #if LUA_VERSION_NUM >= 502
jbe@64 1941 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe@64 1942 #else
jbe/bsw@0 1943 luaL_register(L, NULL, mondelefant_class_mt_functions);
jbe@64 1944 #endif
jbe/bsw@0 1945 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 1946
jbe/bsw@0 1947 lua_newtable(L); // 2
jbe@272 1948 #if LUA_VERSION_NUM >= 502
jbe@272 1949 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe@272 1950 #else
jbe@272 1951 luaL_register(L, NULL, mondelefant_class_methods);
jbe@272 1952 #endif
jbe/bsw@0 1953 lua_newtable(L); // 3
jbe@64 1954 #if LUA_VERSION_NUM >= 502
jbe@64 1955 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe@64 1956 #else
jbe/bsw@0 1957 luaL_register(L, NULL, mondelefant_object_methods);
jbe@64 1958 #endif
jbe/bsw@0 1959 lua_setfield(L, 2, "object");
jbe/bsw@0 1960 lua_newtable(L); // 3
jbe/bsw@0 1961 lua_setfield(L, 2, "object_get");
jbe/bsw@0 1962 lua_newtable(L); // 3
jbe/bsw@0 1963 lua_setfield(L, 2, "object_set");
jbe/bsw@0 1964 lua_newtable(L); // 3
jbe@64 1965 #if LUA_VERSION_NUM >= 502
jbe@64 1966 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe@64 1967 #else
jbe/bsw@0 1968 luaL_register(L, NULL, mondelefant_list_methods);
jbe@64 1969 #endif
jbe/bsw@0 1970 lua_setfield(L, 2, "list");
jbe/bsw@0 1971 lua_newtable(L); // 3
jbe/bsw@0 1972 lua_setfield(L, 2, "references");
jbe/bsw@0 1973 lua_newtable(L); // 3
jbe/bsw@0 1974 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 1975 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1976 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 1977 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 1978
jbe/bsw@0 1979 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 1980 #if LUA_VERSION_NUM >= 502
jbe@64 1981 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe@64 1982 #else
jbe/bsw@0 1983 luaL_register(L, NULL, mondelefant_errorobject_mt_functions);
jbe@64 1984 #endif
jbe/bsw@0 1985 lua_newtable(L); // 3
jbe@64 1986 #if LUA_VERSION_NUM >= 502
jbe@64 1987 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe@64 1988 #else
jbe/bsw@0 1989 luaL_register(L, NULL, mondelefant_errorobject_methods);
jbe@64 1990 #endif
jbe/bsw@0 1991 lua_setfield(L, 2, "__index");
jbe/bsw@0 1992 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 1993
jbe/bsw@0 1994 return 1;
jbe/bsw@0 1995 }

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