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annotate libraries/mondelefant/mondelefant_native.c @ 378:1625fd905168

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Preparatory work for proxy write access to "document_column"
author jbe
date Mon Nov 16 00:19:53 2015 +0100 (2015-11-16)
parents ecafddf7ac93
children 4b1d88f77ab8
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/bsw@0 7
jbe@23 8 // NOTE: Comments with format "// <number>" denote the Lua stack position
jbe@23 9
jbe@23 10 // prefix for all Lua registry entries of this library:
jbe@23 11 #define MONDELEFANT_REGKEY "e449ba8d9a53d353_mondelefant_"
jbe/bsw@0 12
jbe@23 13 // registry key of module "mondelefant_native":
jbe@23 14 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module")
jbe@23 15 // registry key of meta-table for database connections:
jbe@23 16 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection")
jbe@23 17 // registry key of table storing connection specific data:
jbe@23 18 #define MONDELEFANT_CONN_DATA_REGKEY (MONDELEFANT_REGKEY "connection_data")
jbe@23 19 // registry key of meta-table for database result lists and objects:
jbe@23 20 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result")
jbe@23 21 // registry key of meta-table for database error objects:
jbe@23 22 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject")
jbe@23 23 // registry key of meta-table for models (named classes here):
jbe@23 24 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class")
jbe@23 25 // registry key of default prototype for models/classes:
jbe@23 26 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto")
jbe/bsw@0 27
jbe@23 28 // C-structure for database connection userdata:
jbe/bsw@0 29 typedef struct {
jbe/bsw@0 30 PGconn *pgconn;
jbe/bsw@0 31 int server_encoding;
jbe/bsw@0 32 } mondelefant_conn_t;
jbe@23 33 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
jbe@23 34 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
jbe/bsw@0 35
jbe@23 36 // transform codepoint-position to byte-position for a given UTF-8 string:
jbe/bsw@0 37 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
jbe/bsw@0 38 size_t bytepos;
jbe/bsw@0 39 for (bytepos = 0; utf8pos > 0; bytepos++) {
jbe/bsw@0 40 uint8_t c;
jbe/bsw@0 41 c = ((const uint8_t *)str)[bytepos];
jbe/bsw@0 42 if (!c) break;
jbe/bsw@0 43 if (c <= 0x7f || c >= 0xc0) utf8pos--;
jbe/bsw@0 44 }
jbe/bsw@0 45 return bytepos;
jbe/bsw@0 46 }
jbe/bsw@0 47
jbe@23 48 // PostgreSQL's OID for binary data type (bytea):
jbe/bsw@0 49 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
jbe/bsw@0 50
jbe@23 51 // mapping a PostgreSQL type given by its OID to a string identifier:
jbe/bsw@0 52 static const char *mondelefant_oid_to_typestr(Oid oid) {
jbe/bsw@0 53 switch (oid) {
jbe/bsw@0 54 case 16: return "bool";
jbe/bsw@0 55 case 17: return "bytea";
jbe/bsw@0 56 case 18: return "char";
jbe/bsw@0 57 case 19: return "name";
jbe/bsw@0 58 case 20: return "int8";
jbe/bsw@0 59 case 21: return "int2";
jbe/bsw@0 60 case 23: return "int4";
jbe/bsw@0 61 case 25: return "text";
jbe/bsw@0 62 case 26: return "oid";
jbe/bsw@0 63 case 27: return "tid";
jbe/bsw@0 64 case 28: return "xid";
jbe/bsw@0 65 case 29: return "cid";
jbe@176 66 case 114: return "json";
jbe/bsw@0 67 case 600: return "point";
jbe/bsw@0 68 case 601: return "lseg";
jbe/bsw@0 69 case 602: return "path";
jbe/bsw@0 70 case 603: return "box";
jbe/bsw@0 71 case 604: return "polygon";
jbe/bsw@0 72 case 628: return "line";
jbe/bsw@0 73 case 700: return "float4";
jbe/bsw@0 74 case 701: return "float8";
jbe/bsw@0 75 case 705: return "unknown";
jbe/bsw@0 76 case 718: return "circle";
jbe/bsw@0 77 case 790: return "money";
jbe/bsw@0 78 case 829: return "macaddr";
jbe/bsw@0 79 case 869: return "inet";
jbe/bsw@0 80 case 650: return "cidr";
jbe/bsw@0 81 case 1042: return "bpchar";
jbe/bsw@0 82 case 1043: return "varchar";
jbe/bsw@0 83 case 1082: return "date";
jbe/bsw@0 84 case 1083: return "time";
jbe/bsw@0 85 case 1114: return "timestamp";
jbe/bsw@0 86 case 1184: return "timestamptz";
jbe/bsw@0 87 case 1186: return "interval";
jbe/bsw@0 88 case 1266: return "timetz";
jbe/bsw@0 89 case 1560: return "bit";
jbe/bsw@0 90 case 1562: return "varbit";
jbe/bsw@0 91 case 1700: return "numeric";
jbe@176 92 case 3802: return "jsonb";
jbe/bsw@0 93 default: return NULL;
jbe/bsw@0 94 }
jbe/bsw@0 95 }
jbe/bsw@0 96
jbe@23 97 // This library maps PostgreSQL's error codes to CamelCase string
jbe@23 98 // identifiers, which consist of CamelCase identifiers and are seperated
jbe@23 99 // by dots (".") (no leading or trailing dots).
jbe@23 100 // There are additional error identifiers which do not have a corresponding
jbe@23 101 // PostgreSQL error associated with it.
jbe@23 102
jbe@23 103 // matching start of local variable 'pgcode' against string 'incode',
jbe@23 104 // returning string 'outcode' on match:
jbe/bsw@0 105 #define mondelefant_errcode_item(incode, outcode) \
jbe/bsw@0 106 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
jbe/bsw@0 107
jbe@23 108 // additional error identifiers without corresponding PostgreSQL error:
jbe/bsw@0 109 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
jbe/bsw@0 110 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
jbe/bsw@0 111 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
jbe/bsw@0 112 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
jbe/bsw@0 113 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
jbe/bsw@0 114 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
jbe/bsw@0 115
jbe@23 116 // mapping PostgreSQL error code to error code as returned by this library:
jbe/bsw@0 117 static const char *mondelefant_translate_errcode(const char *pgcode) {
jbe/bsw@0 118 if (!pgcode) abort(); // should not happen
jbe/bsw@0 119 mondelefant_errcode_item("02", "NoData")
jbe/bsw@0 120 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
jbe/bsw@0 121 mondelefant_errcode_item("08", "ConnectionException")
jbe/bsw@0 122 mondelefant_errcode_item("09", "TriggeredActionException")
jbe/bsw@0 123 mondelefant_errcode_item("0A", "FeatureNotSupported")
jbe/bsw@0 124 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
jbe/bsw@0 125 mondelefant_errcode_item("0F", "LocatorException")
jbe/bsw@0 126 mondelefant_errcode_item("0L", "InvalidGrantor")
jbe/bsw@0 127 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
jbe/bsw@0 128 mondelefant_errcode_item("21", "CardinalityViolation")
jbe/bsw@0 129 mondelefant_errcode_item("22", "DataException")
jbe/bsw@0 130 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
jbe/bsw@0 131 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
jbe/bsw@0 132 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
jbe/bsw@0 133 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
jbe/bsw@0 134 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
jbe/bsw@0 135 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
jbe/bsw@0 136 mondelefant_errcode_item("24", "InvalidCursorState")
jbe/bsw@0 137 mondelefant_errcode_item("25", "InvalidTransactionState")
jbe/bsw@0 138 mondelefant_errcode_item("26", "InvalidSqlStatementName")
jbe/bsw@0 139 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
jbe/bsw@0 140 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
jbe/bsw@0 141 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
jbe/bsw@0 142 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
jbe/bsw@0 143 mondelefant_errcode_item("2F", "SqlRoutineException")
jbe/bsw@0 144 mondelefant_errcode_item("34", "InvalidCursorName")
jbe/bsw@0 145 mondelefant_errcode_item("38", "ExternalRoutineException")
jbe/bsw@0 146 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
jbe/bsw@0 147 mondelefant_errcode_item("3B", "SavepointException")
jbe/bsw@0 148 mondelefant_errcode_item("3D", "InvalidCatalogName")
jbe/bsw@0 149 mondelefant_errcode_item("3F", "InvalidSchemaName")
jbe/bsw@0 150 mondelefant_errcode_item("40", "TransactionRollback")
jbe/bsw@0 151 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
jbe/bsw@0 152 mondelefant_errcode_item("44", "WithCheckOptionViolation")
jbe/bsw@0 153 mondelefant_errcode_item("53", "InsufficientResources")
jbe/bsw@0 154 mondelefant_errcode_item("54", "ProgramLimitExceeded")
jbe/bsw@0 155 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
jbe/bsw@0 156 mondelefant_errcode_item("57", "OperatorIntervention")
jbe/bsw@0 157 mondelefant_errcode_item("58", "SystemError")
jbe/bsw@0 158 mondelefant_errcode_item("F0", "ConfigurationFileError")
jbe/bsw@0 159 mondelefant_errcode_item("P0", "PlpgsqlError")
jbe/bsw@0 160 mondelefant_errcode_item("XX", "InternalError")
jbe/bsw@0 161 return "unknown";
jbe/bsw@0 162 }
jbe/bsw@0 163
jbe@23 164 // C-function, checking if a given error code (as defined by this library)
jbe@23 165 // is belonging to a certain class of errors (strings are equal or error
jbe@23 166 // code begins with error class followed by a dot):
jbe/bsw@0 167 static int mondelefant_check_error_class(
jbe/bsw@0 168 const char *errcode, const char *errclass
jbe/bsw@0 169 ) {
jbe/bsw@0 170 size_t i = 0;
jbe/bsw@0 171 while (1) {
jbe/bsw@0 172 if (errclass[i] == 0) {
jbe/bsw@0 173 if (errcode[i] == 0 || errcode[i] == '.') return 1;
jbe/bsw@0 174 else return 0;
jbe/bsw@0 175 }
jbe/bsw@0 176 if (errcode[i] != errclass[i]) return 0;
jbe/bsw@0 177 i++;
jbe/bsw@0 178 }
jbe/bsw@0 179 }
jbe/bsw@0 180
jbe@23 181 // pushing first line of a string on Lua's stack (without trailing CR/LF):
jbe/bsw@0 182 static void mondelefant_push_first_line(lua_State *L, const char *str) {
jbe/bsw@0 183 char *str2;
jbe/bsw@0 184 size_t i = 0;
jbe/bsw@0 185 if (!str) abort(); // should not happen
jbe/bsw@0 186 str2 = strdup(str);
jbe/bsw@0 187 while (1) {
jbe/bsw@0 188 char c = str2[i];
jbe/bsw@0 189 if (c == '\n' || c == '\r' || c == 0) { str2[i] = 0; break; }
jbe/bsw@0 190 i++;
jbe/bsw@0 191 };
jbe/bsw@0 192 lua_pushstring(L, str2);
jbe/bsw@0 193 free(str2);
jbe/bsw@0 194 }
jbe/bsw@0 195
jbe@23 196 // "connect" function of library, which establishes a database connection
jbe@23 197 // and returns a database connection handle:
jbe/bsw@0 198 static int mondelefant_connect(lua_State *L) {
jbe@23 199 luaL_Buffer buf; // Lua string buffer to create 'conninfo' (see below)
jbe@23 200 const char *conninfo; // string for PQconnectdb function
jbe@23 201 PGconn *pgconn; // PGconn object as returned by PQconnectdb function
jbe@23 202 mondelefant_conn_t *conn; // C-structure for userdata
jbe@23 203 // if engine is anything but "postgresql", then raise error:
jbe/bsw@0 204 lua_settop(L, 1);
jbe/bsw@0 205 lua_getfield(L, 1, "engine"); // 2
jbe/bsw@0 206 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 207 return luaL_error(L, "No database engine selected.");
jbe/bsw@0 208 }
jbe/bsw@0 209 lua_pushliteral(L, "postgresql"); // 3
jbe/bsw@0 210 if (!lua_rawequal(L, 2, 3)) {
jbe/bsw@0 211 return luaL_error(L,
jbe/bsw@0 212 "Only database engine 'postgresql' is supported."
jbe/bsw@0 213 );
jbe/bsw@0 214 }
jbe@40 215 // copy conninfo string for PQconnectdb function from argument table to
jbe@40 216 // stack position 2:
jbe/bsw@0 217 lua_settop(L, 1);
jbe@40 218 lua_getfield(L, 1, "conninfo"); // 2
jbe@40 219 // if no conninfo string was found, then assemble one from the named
jbe@40 220 // options except "engine" option:
jbe@40 221 if (!lua_toboolean(L, 2)) {
jbe@40 222 lua_settop(L, 1);
jbe@40 223 lua_pushnil(L); // slot for key at stack position 2
jbe@40 224 lua_pushnil(L); // slot for value at stack position 3
jbe@40 225 luaL_buffinit(L, &buf);
jbe@40 226 {
jbe@40 227 int need_seperator = 0;
jbe@40 228 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
jbe@40 229 lua_replace(L, 3);
jbe@40 230 lua_replace(L, 2);
jbe@40 231 // NOTE: numbers will be converted to strings automatically here,
jbe@40 232 // but perhaps this will change in future versions of lua
jbe@40 233 luaL_argcheck(L,
jbe@40 234 lua_isstring(L, 2) && lua_isstring(L, 3), 1, "non-string contained"
jbe@40 235 );
jbe@40 236 lua_pushvalue(L, 2);
jbe@40 237 lua_pushliteral(L, "engine");
jbe@40 238 if (!lua_rawequal(L, -2, -1)) {
jbe@40 239 const char *value;
jbe@40 240 size_t value_len;
jbe@40 241 size_t value_pos = 0;
jbe@40 242 lua_pop(L, 1);
jbe@40 243 if (need_seperator) luaL_addchar(&buf, ' ');
jbe@40 244 luaL_addvalue(&buf);
jbe@40 245 luaL_addchar(&buf, '=');
jbe@40 246 luaL_addchar(&buf, '\'');
jbe@40 247 value = lua_tolstring(L, 3, &value_len);
jbe@40 248 do {
jbe@40 249 char c;
jbe@40 250 c = value[value_pos++];
jbe@40 251 if (c == '\'') luaL_addchar(&buf, '\\');
jbe@40 252 luaL_addchar(&buf, c);
jbe@40 253 } while (value_pos < value_len);
jbe@40 254 luaL_addchar(&buf, '\'');
jbe@40 255 need_seperator = 1;
jbe@40 256 } else {
jbe@40 257 lua_pop(L, 1);
jbe@40 258 }
jbe/bsw@0 259 }
jbe/bsw@0 260 }
jbe@40 261 luaL_pushresult(&buf);
jbe@40 262 lua_replace(L, 2);
jbe@40 263 lua_settop(L, 2);
jbe/bsw@0 264 }
jbe@40 265 // use conninfo string on stack position 2:
jbe/bsw@0 266 conninfo = lua_tostring(L, 2);
jbe@23 267 // call PQconnectdb function of libpq:
jbe/bsw@0 268 pgconn = PQconnectdb(conninfo);
jbe@23 269 // throw errors, if neccessary:
jbe/bsw@0 270 if (!pgconn) {
jbe/bsw@0 271 return luaL_error(L,
jbe/bsw@0 272 "Error in libpq while creating 'PGconn' structure."
jbe/bsw@0 273 );
jbe/bsw@0 274 }
jbe/bsw@0 275 if (PQstatus(pgconn) != CONNECTION_OK) {
jbe/bsw@0 276 const char *errmsg;
jbe/bsw@0 277 lua_pushnil(L);
jbe/bsw@0 278 errmsg = PQerrorMessage(pgconn);
jbe/bsw@0 279 if (errmsg) {
jbe/bsw@0 280 mondelefant_push_first_line(L, errmsg);
jbe/bsw@0 281 } else {
jbe/bsw@0 282 lua_pushliteral(L,
jbe/bsw@0 283 "Error while connecting to database, but no error message given."
jbe/bsw@0 284 );
jbe/bsw@0 285 }
jbe/bsw@0 286 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 287 PQfinish(pgconn);
jbe/bsw@0 288 return 3;
jbe/bsw@0 289 }
jbe@23 290 // create userdata:
jbe/bsw@0 291 lua_settop(L, 0);
jbe/bsw@0 292 conn = lua_newuserdata(L, sizeof(*conn)); // 1
jbe@23 293 // set 'pgconn' in C-struct of userdata:
jbe/bsw@0 294 conn->pgconn = pgconn;
jbe@23 295 // set 'server_encoding' in C-struct of userdata:
jbe/bsw@0 296 {
jbe/bsw@0 297 const char *charset;
jbe/bsw@0 298 charset = PQparameterStatus(pgconn, "server_encoding");
jbe/bsw@0 299 if (charset && !strcmp(charset, "UTF8")) {
jbe/bsw@0 300 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
jbe/bsw@0 301 } else {
jbe/bsw@0 302 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
jbe/bsw@0 303 }
jbe/bsw@0 304 }
jbe@23 305 // set meta-table of userdata:
jbe/bsw@0 306 luaL_getmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe/bsw@0 307 lua_setmetatable(L, 1);
jbe@23 308 // create entry in table storing connection specific data and associate
jbe@23 309 // created userdata with it:
jbe/bsw@0 310 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 2
jbe/bsw@0 311 lua_pushvalue(L, 1); // 3
jbe/bsw@0 312 lua_newtable(L); // 4
jbe/bsw@0 313 lua_settable(L, 2);
jbe/bsw@0 314 lua_settop(L, 1);
jbe@23 315 // store key "engine" with value "postgresql" as connection specific data:
jbe/bsw@0 316 lua_pushliteral(L, "postgresql");
jbe/bsw@0 317 lua_setfield(L, 1, "engine");
jbe@23 318 // return userdata:
jbe/bsw@0 319 return 1;
jbe/bsw@0 320 }
jbe/bsw@0 321
jbe@23 322 // returns pointer to libpq handle 'pgconn' of userdata at given index
jbe@23 323 // (or throws error, if database connection has been closed):
jbe/bsw@0 324 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
jbe/bsw@0 325 mondelefant_conn_t *conn;
jbe/bsw@0 326 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 327 if (!conn->pgconn) {
jbe/bsw@0 328 luaL_error(L, "PostgreSQL connection has been closed.");
jbe/bsw@0 329 return NULL;
jbe/bsw@0 330 }
jbe/bsw@0 331 return conn;
jbe/bsw@0 332 }
jbe/bsw@0 333
jbe@23 334 // meta-method "__index" of database handles (userdata):
jbe/bsw@0 335 static int mondelefant_conn_index(lua_State *L) {
jbe@23 336 // try table for connection specific data:
jbe/bsw@0 337 lua_settop(L, 2);
jbe/bsw@0 338 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 3
jbe/bsw@0 339 lua_pushvalue(L, 1); // 4
jbe/bsw@0 340 lua_gettable(L, 3); // 4
jbe/bsw@0 341 lua_remove(L, 3); // connection specific data-table at stack position 3
jbe/bsw@0 342 lua_pushvalue(L, 2); // 4
jbe/bsw@0 343 lua_gettable(L, 3); // 4
jbe/bsw@0 344 if (!lua_isnil(L, 4)) return 1;
jbe@23 345 // try to use prototype stored in connection specific data:
jbe/bsw@0 346 lua_settop(L, 3);
jbe/bsw@0 347 lua_getfield(L, 3, "prototype"); // 4
jbe/bsw@0 348 if (lua_toboolean(L, 4)) {
jbe/bsw@0 349 lua_pushvalue(L, 2); // 5
jbe/bsw@0 350 lua_gettable(L, 4); // 5
jbe/bsw@0 351 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 352 }
jbe@23 353 // try to use "postgresql_connection_prototype" of library:
jbe/bsw@0 354 lua_settop(L, 2);
jbe/bsw@0 355 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
jbe/bsw@0 356 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
jbe/bsw@0 357 if (lua_toboolean(L, 4)) {
jbe/bsw@0 358 lua_pushvalue(L, 2); // 5
jbe/bsw@0 359 lua_gettable(L, 4); // 5
jbe/bsw@0 360 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 361 }
jbe@23 362 // try to use "connection_prototype" of library:
jbe/bsw@0 363 lua_settop(L, 3);
jbe/bsw@0 364 lua_getfield(L, 3, "connection_prototype"); // 4
jbe/bsw@0 365 if (lua_toboolean(L, 4)) {
jbe/bsw@0 366 lua_pushvalue(L, 2); // 5
jbe/bsw@0 367 lua_gettable(L, 4); // 5
jbe/bsw@0 368 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 369 }
jbe@23 370 // give up and return nothing:
jbe/bsw@0 371 return 0;
jbe/bsw@0 372 }
jbe/bsw@0 373
jbe@23 374 // meta-method "__newindex" of database handles (userdata):
jbe/bsw@0 375 static int mondelefant_conn_newindex(lua_State *L) {
jbe@23 376 // store key-value pair in table for connection specific data:
jbe/bsw@0 377 lua_settop(L, 3);
jbe/bsw@0 378 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 4
jbe/bsw@0 379 lua_pushvalue(L, 1); // 5
jbe/bsw@0 380 lua_gettable(L, 4); // 5
jbe@23 381 lua_remove(L, 4); // connection specific data-table at stack position 4
jbe/bsw@0 382 lua_pushvalue(L, 2);
jbe/bsw@0 383 lua_pushvalue(L, 3);
jbe/bsw@0 384 lua_settable(L, 4);
jbe@23 385 // return nothing:
jbe/bsw@0 386 return 0;
jbe/bsw@0 387 }
jbe/bsw@0 388
jbe@23 389 // meta-method "__gc" of database handles:
jbe/bsw@0 390 static int mondelefant_conn_free(lua_State *L) {
jbe/bsw@0 391 mondelefant_conn_t *conn;
jbe/bsw@0 392 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 393 if (conn->pgconn) PQfinish(conn->pgconn);
jbe/bsw@0 394 conn->pgconn = NULL;
jbe/bsw@0 395 return 0;
jbe/bsw@0 396 }
jbe/bsw@0 397
jbe@23 398 // method "close" of database handles:
jbe/bsw@0 399 static int mondelefant_conn_close(lua_State *L) {
jbe/bsw@0 400 mondelefant_conn_t *conn;
jbe/bsw@0 401 lua_settop(L, 1);
jbe/bsw@0 402 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 403 PQfinish(conn->pgconn);
jbe/bsw@0 404 conn->pgconn = NULL;
jbe/bsw@0 405 return 0;
jbe/bsw@0 406 }
jbe/bsw@0 407
jbe@23 408 // method "is_okay" of database handles:
jbe/bsw@0 409 static int mondelefant_conn_is_ok(lua_State *L) {
jbe/bsw@0 410 mondelefant_conn_t *conn;
jbe/bsw@0 411 lua_settop(L, 1);
jbe/bsw@0 412 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 413 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
jbe/bsw@0 414 return 1;
jbe/bsw@0 415 }
jbe/bsw@0 416
jbe@23 417 // method "get_transaction_status" of database handles:
jbe/bsw@0 418 static int mondelefant_conn_get_transaction_status(lua_State *L) {
jbe/bsw@0 419 mondelefant_conn_t *conn;
jbe/bsw@0 420 lua_settop(L, 1);
jbe/bsw@0 421 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 422 switch (PQtransactionStatus(conn->pgconn)) {
jbe/bsw@0 423 case PQTRANS_IDLE:
jbe/bsw@0 424 lua_pushliteral(L, "idle");
jbe/bsw@0 425 break;
jbe/bsw@0 426 case PQTRANS_ACTIVE:
jbe/bsw@0 427 lua_pushliteral(L, "active");
jbe/bsw@0 428 break;
jbe/bsw@0 429 case PQTRANS_INTRANS:
jbe/bsw@0 430 lua_pushliteral(L, "intrans");
jbe/bsw@0 431 break;
jbe/bsw@0 432 case PQTRANS_INERROR:
jbe/bsw@0 433 lua_pushliteral(L, "inerror");
jbe/bsw@0 434 break;
jbe/bsw@0 435 default:
jbe/bsw@0 436 lua_pushliteral(L, "unknown");
jbe/bsw@0 437 }
jbe/bsw@0 438 return 1;
jbe/bsw@0 439 }
jbe/bsw@0 440
jbe@23 441 // method "create_list" of database handles:
jbe/bsw@0 442 static int mondelefant_conn_create_list(lua_State *L) {
jbe@23 443 // ensure that first argument is a database connection:
jbe/bsw@0 444 lua_settop(L, 2);
jbe/bsw@0 445 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 446 // if no second argument is given, use an empty table:
jbe/bsw@0 447 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 448 lua_newtable(L);
jbe/bsw@0 449 lua_replace(L, 2); // new result at stack position 2
jbe/bsw@0 450 }
jbe@23 451 // set meta-table for database result lists/objects:
jbe/bsw@0 452 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
jbe/bsw@0 453 lua_setmetatable(L, 2);
jbe@23 454 // set "_connection" attribute to self:
jbe/bsw@0 455 lua_pushvalue(L, 1); // 3
jbe/bsw@0 456 lua_setfield(L, 2, "_connection");
jbe@23 457 // set "_type" attribute to string "list":
jbe/bsw@0 458 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 459 lua_setfield(L, 2, "_type");
jbe@23 460 // return created database result list:
jbe/bsw@0 461 return 1;
jbe/bsw@0 462 }
jbe/bsw@0 463
jbe@23 464 // method "create_object" of database handles:
jbe/bsw@0 465 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 466 // ensure that first argument is a database connection:
jbe/bsw@0 467 lua_settop(L, 2);
jbe/bsw@0 468 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 469 // if no second argument is given, use an empty table:
jbe/bsw@0 470 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 471 lua_newtable(L);
jbe/bsw@0 472 lua_replace(L, 2); // new result at stack position 2
jbe/bsw@0 473 }
jbe@23 474 // set meta-table for database result lists/objects:
jbe/bsw@0 475 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
jbe/bsw@0 476 lua_setmetatable(L, 2);
jbe@23 477 // set "_connection" attribute to self:
jbe/bsw@0 478 lua_pushvalue(L, 1); // 3
jbe/bsw@0 479 lua_setfield(L, 2, "_connection");
jbe@23 480 // set "_type" attribute to string "object":
jbe/bsw@0 481 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 482 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@23 483 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 484 lua_newtable(L); // 3
jbe/bsw@0 485 lua_setfield(L, 2, "_data");
jbe/bsw@0 486 lua_newtable(L); // 3
jbe/bsw@0 487 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 488 lua_newtable(L); // 3
jbe/bsw@0 489 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@23 490 // return created database result object:
jbe/bsw@0 491 return 1;
jbe/bsw@0 492 }
jbe/bsw@0 493
jbe@23 494 // method "quote_string" of database handles:
jbe/bsw@0 495 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 496 mondelefant_conn_t *conn;
jbe/bsw@0 497 const char *input;
jbe/bsw@0 498 size_t input_len;
jbe/bsw@0 499 char *output;
jbe/bsw@0 500 size_t output_len;
jbe@23 501 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 502 lua_settop(L, 2);
jbe/bsw@0 503 conn = mondelefant_get_conn(L, 1);
jbe@23 504 // get second argument, which must be a string:
jbe/bsw@0 505 input = luaL_checklstring(L, 2, &input_len);
jbe@23 506 // throw error, if string is too long:
jbe/bsw@0 507 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 508 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 509 }
jbe@23 510 // allocate memory for quoted string:
jbe/bsw@0 511 output = malloc((2 * input_len + 3) * sizeof(char));
jbe/bsw@0 512 if (!output) {
jbe/bsw@0 513 return luaL_error(L, "Could not allocate memory for string quoting.");
jbe/bsw@0 514 }
jbe@23 515 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 516 // single quotes:
jbe/bsw@0 517 output[0] = '\'';
jbe/bsw@0 518 output_len = PQescapeStringConn(
jbe/bsw@0 519 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 520 );
jbe/bsw@0 521 output[output_len + 1] = '\'';
jbe/bsw@0 522 output[output_len + 2] = 0;
jbe@23 523 // create Lua string:
jbe/bsw@0 524 lua_pushlstring(L, output, output_len + 2);
jbe@23 525 // free allocated memory:
jbe/bsw@0 526 free(output);
jbe@23 527 // return Lua string:
jbe/bsw@0 528 return 1;
jbe/bsw@0 529 }
jbe/bsw@0 530
jbe@23 531 // method "quote_binary" of database handles:
jbe/bsw@0 532 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 533 mondelefant_conn_t *conn;
jbe/bsw@0 534 const char *input;
jbe/bsw@0 535 size_t input_len;
jbe/bsw@0 536 char *output;
jbe/bsw@0 537 size_t output_len;
jbe/bsw@0 538 luaL_Buffer buf;
jbe@23 539 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 540 lua_settop(L, 2);
jbe/bsw@0 541 conn = mondelefant_get_conn(L, 1);
jbe@23 542 // get second argument, which must be a string:
jbe/bsw@0 543 input = luaL_checklstring(L, 2, &input_len);
jbe@23 544 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 545 output = (char *)PQescapeByteaConn(
jbe/bsw@0 546 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 547 );
jbe@23 548 // if PQescapeByteaConn returned NULL, then throw error:
jbe/bsw@0 549 if (!output) {
jbe/bsw@0 550 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe/bsw@0 551 }
jbe@23 552 // create Lua string enclosed by single quotes:
jbe/bsw@0 553 luaL_buffinit(L, &buf);
jbe/bsw@0 554 luaL_addchar(&buf, '\'');
jbe/bsw@0 555 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 556 luaL_addchar(&buf, '\'');
jbe/bsw@0 557 luaL_pushresult(&buf);
jbe@23 558 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 559 PQfreemem(output);
jbe@23 560 // return Lua string:
jbe/bsw@0 561 return 1;
jbe/bsw@0 562 }
jbe/bsw@0 563
jbe@23 564 // method "assemble_command" of database handles:
jbe/bsw@0 565 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 566 mondelefant_conn_t *conn;
jbe/bsw@0 567 int paramidx = 2;
jbe/bsw@0 568 const char *template;
jbe/bsw@0 569 size_t template_pos = 0;
jbe/bsw@0 570 luaL_Buffer buf;
jbe@23 571 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 572 lua_settop(L, 2);
jbe/bsw@0 573 conn = mondelefant_get_conn(L, 1);
jbe@23 574 // if second argument is a string, return this string:
jbe/bsw@0 575 if (lua_isstring(L, 2)) {
jbe/bsw@0 576 lua_tostring(L, 2);
jbe/bsw@0 577 return 1;
jbe/bsw@0 578 }
jbe@23 579 // if second argument has __tostring meta-method,
jbe@23 580 // then use this method and return its result:
jbe/bsw@0 581 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 582 // otherwise, require that second argument is a table:
jbe/bsw@0 583 luaL_checktype(L, 2, LUA_TTABLE);
jbe@23 584 // get first element of table, which must be a string:
jbe/bsw@0 585 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 586 luaL_argcheck(L,
jbe/bsw@0 587 lua_isstring(L, 3),
jbe/bsw@0 588 2,
jbe/bsw@0 589 "First entry of SQL command structure is not a string."
jbe/bsw@0 590 );
jbe/bsw@0 591 template = lua_tostring(L, 3);
jbe@23 592 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 593 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 594 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 595 // reserve space on Lua stack:
jbe/bsw@0 596 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 597 lua_pushnil(L); // free space at stack position 6
jbe@23 598 // initialize Lua buffer for result string:
jbe/bsw@0 599 luaL_buffinit(L, &buf);
jbe@23 600 // fill buffer in loop:
jbe/bsw@0 601 while (1) {
jbe@23 602 // variable declaration:
jbe/bsw@0 603 char c;
jbe@23 604 // get next character:
jbe/bsw@0 605 c = template[template_pos++];
jbe@23 606 // break, when character is NULL byte:
jbe/bsw@0 607 if (!c) break;
jbe@23 608 // question-mark and dollar-sign are special characters:
jbe@23 609 if (c == '?' || c == '$') { // special character found
jbe@23 610 // check, if same character follows:
jbe@23 611 if (template[template_pos] == c) { // special character is escaped
jbe@23 612 // consume two characters of input and add one character to buffer:
jbe/bsw@0 613 template_pos++;
jbe/bsw@0 614 luaL_addchar(&buf, c);
jbe@23 615 } else { // special character is not escaped
jbe/bsw@0 616 luaL_Buffer keybuf;
jbe/bsw@0 617 int subcmd;
jbe@23 618 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 619 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 620 subcmd = (c == '$');
jbe@23 621 // read any number of alpha numeric chars or underscores
jbe@23 622 // and store them on Lua stack:
jbe/bsw@0 623 luaL_buffinit(L, &keybuf);
jbe/bsw@0 624 while (1) {
jbe/bsw@0 625 c = template[template_pos];
jbe/bsw@0 626 if (
jbe/bsw@0 627 (c < 'A' || c > 'Z') &&
jbe/bsw@0 628 (c < 'a' || c > 'z') &&
jbe/bsw@0 629 (c < '0' || c > '9') &&
jbe/bsw@0 630 (c != '_')
jbe/bsw@0 631 ) break;
jbe/bsw@0 632 luaL_addchar(&keybuf, c);
jbe/bsw@0 633 template_pos++;
jbe/bsw@0 634 }
jbe/bsw@0 635 luaL_pushresult(&keybuf);
jbe@23 636 // check, if any characters matched:
jbe@64 637 #if LUA_VERSION_NUM >= 502
jbe@64 638 if (lua_rawlen(L, -1)) {
jbe@64 639 #else
jbe/bsw@0 640 if (lua_objlen(L, -1)) {
jbe@64 641 #endif
jbe@23 642 // if any alpha numeric chars or underscores were found,
jbe@23 643 // push them on stack as a Lua string and use them to lookup
jbe@23 644 // value from second argument:
jbe/bsw@0 645 lua_pushvalue(L, -1); // save key on stack
jbe@23 646 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 647 } else {
jbe@23 648 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 649 lua_pop(L, 1);
jbe/bsw@0 650 lua_pushnil(L); // put nil on key position
jbe@23 651 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 652 }
jbe@23 653 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 654 // branch according to type of special character ("?" or "$"):
jbe@23 655 if (subcmd) { // dollar-sign
jbe/bsw@0 656 size_t i;
jbe/bsw@0 657 size_t count;
jbe@23 658 // store fetched value (which is supposed to be sub-structure)
jbe@23 659 // on Lua stack position 5 and drop key:
jbe@23 660 lua_replace(L, 5);
jbe@23 661 lua_pop(L, 1);
jbe@23 662 // Lua stack contains: ..., <buffer>
jbe@23 663 // check, if fetched value is really a sub-structure:
jbe/bsw@0 664 luaL_argcheck(L,
jbe/bsw@0 665 !lua_isnil(L, 5),
jbe/bsw@0 666 2,
jbe/bsw@0 667 "SQL sub-structure not found."
jbe/bsw@0 668 );
jbe/bsw@0 669 luaL_argcheck(L,
jbe/bsw@0 670 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 671 2,
jbe/bsw@0 672 "SQL sub-structure must be a table."
jbe/bsw@0 673 );
jbe@23 674 // Lua stack contains: ..., <buffer>
jbe@23 675 // get value of "sep" attribute of sub-structure,
jbe@23 676 // and place it on Lua stack position 6:
jbe/bsw@0 677 lua_getfield(L, 5, "sep");
jbe@23 678 lua_replace(L, 6);
jbe@23 679 // if seperator is nil, then use ", " as default,
jbe@23 680 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 681 if (lua_isnil(L, 6)) {
jbe/bsw@0 682 lua_pushstring(L, ", ");
jbe/bsw@0 683 lua_replace(L, 6);
jbe/bsw@0 684 } else {
jbe/bsw@0 685 luaL_argcheck(L,
jbe/bsw@0 686 lua_isstring(L, 6),
jbe/bsw@0 687 2,
jbe/bsw@0 688 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 689 );
jbe/bsw@0 690 }
jbe@23 691 // iterate over items of sub-structure:
jbe@64 692 #if LUA_VERSION_NUM >= 502
jbe@64 693 count = lua_rawlen(L, 5);
jbe@64 694 #else
jbe/bsw@0 695 count = lua_objlen(L, 5);
jbe@64 696 #endif
jbe/bsw@0 697 for (i = 0; i < count; i++) {
jbe@23 698 // add seperator, unless this is the first run:
jbe/bsw@0 699 if (i) {
jbe/bsw@0 700 lua_pushvalue(L, 6);
jbe/bsw@0 701 luaL_addvalue(&buf);
jbe/bsw@0 702 }
jbe@23 703 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 704 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 705 lua_pushvalue(L, 1);
jbe/bsw@0 706 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 707 lua_call(L, 2, 1);
jbe/bsw@0 708 luaL_addvalue(&buf);
jbe/bsw@0 709 }
jbe@23 710 } else { // question-mark
jbe/bsw@0 711 if (lua_toboolean(L, 4)) {
jbe@23 712 // call input_converter with connection handle, raw-value and
jbe@23 713 // an info-table which contains a "field_name" entry with the
jbe@23 714 // used key:
jbe/bsw@0 715 lua_pushvalue(L, 4);
jbe/bsw@0 716 lua_pushvalue(L, 1);
jbe/bsw@0 717 lua_pushvalue(L, -3);
jbe/bsw@0 718 lua_newtable(L);
jbe/bsw@0 719 lua_pushvalue(L, -6);
jbe/bsw@0 720 lua_setfield(L, -2, "field_name");
jbe/bsw@0 721 lua_call(L, 3, 1);
jbe@23 722 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 723 // remove key and raw-value:
jbe/bsw@0 724 lua_remove(L, -2);
jbe/bsw@0 725 lua_remove(L, -2);
jbe@23 726 // Lua stack contains: ..., <buffer>, final-value
jbe@23 727 // throw error, if final-value is not a string:
jbe/bsw@0 728 if (!lua_isstring(L, -1)) {
jbe/bsw@0 729 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 730 }
jbe/bsw@0 731 } else {
jbe@23 732 // remove key from stack:
jbe/bsw@0 733 lua_remove(L, -2);
jbe@23 734 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 735 // branch according to type of value:
jbe@23 736 if (lua_isnil(L, -1)) { // value is nil
jbe@23 737 // push string "NULL" to stack:
jbe/bsw@0 738 lua_pushliteral(L, "NULL");
jbe@23 739 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 740 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 741 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 742 } else if (lua_isstring(L, -1)) { // value is string or number
jbe/bsw@0 743 // NOTE: In this version of lua a number will be converted
jbe@23 744 // push output of "quote_string" method of database
jbe@23 745 // connection to stack:
jbe/bsw@0 746 lua_tostring(L, -1);
jbe/bsw@0 747 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 748 lua_pushvalue(L, 1);
jbe/bsw@0 749 lua_pushvalue(L, -3);
jbe/bsw@0 750 lua_call(L, 2, 1);
jbe@23 751 } else { // value is of other type
jbe@23 752 // throw error:
jbe/bsw@0 753 return luaL_error(L,
jbe/bsw@0 754 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 755 "or missing input_converter."
jbe/bsw@0 756 );
jbe/bsw@0 757 }
jbe@23 758 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 759 // remove raw-value:
jbe/bsw@0 760 lua_remove(L, -2);
jbe@23 761 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 762 }
jbe@23 763 // append final-value to buffer:
jbe/bsw@0 764 luaL_addvalue(&buf);
jbe/bsw@0 765 }
jbe/bsw@0 766 }
jbe@23 767 } else { // character is not special
jbe@23 768 // just copy character:
jbe/bsw@0 769 luaL_addchar(&buf, c);
jbe/bsw@0 770 }
jbe/bsw@0 771 }
jbe@23 772 // return string in buffer:
jbe/bsw@0 773 luaL_pushresult(&buf);
jbe/bsw@0 774 return 1;
jbe/bsw@0 775 }
jbe/bsw@0 776
jbe@23 777 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 778 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 779 // max number of columns in a database result:
jbe/bsw@0 780 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 781 // enum values for 'modes' array in C-function below:
jbe/bsw@0 782 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 783 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 784 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 785
jbe@23 786 // method "try_query" of database handles:
jbe/bsw@0 787 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 788 mondelefant_conn_t *conn;
jbe/bsw@0 789 int command_count;
jbe/bsw@0 790 int command_idx;
jbe/bsw@0 791 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 792 luaL_Buffer buf;
jbe/bsw@0 793 int sent_success;
jbe/bsw@0 794 PGresult *res;
jbe/bsw@0 795 int rows, cols, row, col;
jbe@23 796 // get 'conn' attribute of C-struct of database connection:
jbe/bsw@0 797 conn = mondelefant_get_conn(L, 1);
jbe@23 798 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 799 command_count = lua_gettop(L) / 2;
jbe@23 800 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 801 lua_pushnil(L);
jbe@23 802 // throw error, if number of commands is too high:
jbe/bsw@0 803 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 804 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 805 }
jbe@23 806 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 807 luaL_buffinit(L, &buf);
jbe/bsw@0 808 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 809 int mode;
jbe/bsw@0 810 int mode_idx; // stack index of mode string
jbe/bsw@0 811 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 812 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 813 lua_pushvalue(L, 1);
jbe/bsw@0 814 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 815 lua_call(L, 2, 1);
jbe/bsw@0 816 luaL_addvalue(&buf);
jbe/bsw@0 817 luaL_addchar(&buf, ';');
jbe/bsw@0 818 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 819 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 820 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 821 } else {
jbe/bsw@0 822 const char *modestr;
jbe/bsw@0 823 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 824 if (!strcmp(modestr, "list")) {
jbe/bsw@0 825 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 826 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 827 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 828 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 829 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 830 } else {
jbe/bsw@0 831 return luaL_error(L, "Unknown query mode specified.");
jbe/bsw@0 832 }
jbe/bsw@0 833 }
jbe/bsw@0 834 modes[command_idx] = mode;
jbe/bsw@0 835 }
jbe/bsw@0 836 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 837 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 838 // call sql_tracer, if set:
jbe/bsw@0 839 lua_settop(L, 2);
jbe/bsw@0 840 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 841 if (lua_toboolean(L, 3)) {
jbe/bsw@0 842 lua_pushvalue(L, 1); // 4
jbe/bsw@0 843 lua_pushvalue(L, 2); // 5
jbe/bsw@0 844 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 845 }
jbe@23 846 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 847 // position 3.
jbe@23 848 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 849 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 850 // create preliminary result table:
jbe/bsw@0 851 lua_newtable(L); // results in table at stack position 4
jbe@23 852 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 853 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 854 int mode;
jbe/bsw@0 855 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 856 ExecStatusType pgstatus;
jbe@23 857 // fetch mode which was given for the command:
jbe/bsw@0 858 mode = modes[command_idx];
jbe@23 859 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 860 if (sent_success) {
jbe@23 861 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 862 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 863 res = PQgetResult(conn->pgconn);
jbe/bsw@0 864 if (command_idx >= command_count && !res) break;
jbe/bsw@0 865 if (res) {
jbe/bsw@0 866 pgstatus = PQresultStatus(res);
jbe/bsw@0 867 rows = PQntuples(res);
jbe/bsw@0 868 cols = PQnfields(res);
jbe/bsw@0 869 }
jbe/bsw@0 870 }
jbe@23 871 // handle errors:
jbe/bsw@0 872 if (
jbe/bsw@0 873 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 874 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 875 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 876 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 877 ) {
jbe/bsw@0 878 const char *command;
jbe/bsw@0 879 command = lua_tostring(L, 2);
jbe/bsw@0 880 lua_newtable(L); // 5
jbe/bsw@0 881 lua_getfield(L,
jbe/bsw@0 882 LUA_REGISTRYINDEX,
jbe/bsw@0 883 MONDELEFANT_ERROROBJECT_MT_REGKEY
jbe/bsw@0 884 );
jbe/bsw@0 885 lua_setmetatable(L, 5);
jbe/bsw@0 886 lua_pushvalue(L, 1);
jbe/bsw@0 887 lua_setfield(L, 5, "connection");
jbe/bsw@0 888 lua_pushinteger(L, command_idx + 1);
jbe/bsw@0 889 lua_setfield(L, 5, "command_number");
jbe/bsw@0 890 lua_pushvalue(L, 2);
jbe/bsw@0 891 lua_setfield(L, 5, "sql_command");
jbe/bsw@0 892 if (!res) {
jbe/bsw@0 893 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe/bsw@0 894 lua_setfield(L, 5, "code");
jbe/bsw@0 895 lua_pushliteral(L, "Received too few database result sets.");
jbe/bsw@0 896 lua_setfield(L, 5, "message");
jbe/bsw@0 897 } else if (command_idx >= command_count) {
jbe/bsw@0 898 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe/bsw@0 899 lua_setfield(L, 5, "code");
jbe/bsw@0 900 lua_pushliteral(L, "Received too many database result sets.");
jbe/bsw@0 901 lua_setfield(L, 5, "message");
jbe/bsw@0 902 } else if (
jbe/bsw@0 903 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe/bsw@0 904 ) {
jbe/bsw@0 905 const char *sqlstate;
jbe/bsw@0 906 const char *errmsg;
jbe/bsw@0 907 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe/bsw@0 908 lua_setfield(L, 5, "pg_severity");
jbe/bsw@0 909 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe/bsw@0 910 if (sqlstate) {
jbe/bsw@0 911 lua_pushstring(L, sqlstate);
jbe/bsw@0 912 lua_setfield(L, 5, "pg_sqlstate");
jbe/bsw@0 913 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe/bsw@0 914 lua_setfield(L, 5, "code");
jbe/bsw@0 915 } else {
jbe/bsw@0 916 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe/bsw@0 917 lua_setfield(L, 5, "code");
jbe/bsw@0 918 }
jbe/bsw@0 919 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe/bsw@0 920 if (errmsg) {
jbe/bsw@0 921 mondelefant_push_first_line(L, errmsg);
jbe/bsw@0 922 lua_setfield(L, 5, "message");
jbe/bsw@0 923 lua_pushstring(L, errmsg);
jbe/bsw@0 924 lua_setfield(L, 5, "pg_message_primary");
jbe/bsw@0 925 } else {
jbe/bsw@0 926 lua_pushliteral(L,
jbe/bsw@0 927 "Error while fetching result, but no error message given."
jbe/bsw@0 928 );
jbe/bsw@0 929 lua_setfield(L, 5, "message");
jbe/bsw@0 930 }
jbe/bsw@0 931 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe/bsw@0 932 lua_setfield(L, 5, "pg_message_detail");
jbe/bsw@0 933 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe/bsw@0 934 lua_setfield(L, 5, "pg_message_hint");
jbe/bsw@0 935 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe/bsw@0 936 // byte offsets, as Lua 5.1 is not Unicode aware.
jbe/bsw@0 937 {
jbe/bsw@0 938 char *tmp;
jbe/bsw@0 939 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe/bsw@0 940 if (tmp) {
jbe/bsw@0 941 int pos;
jbe/bsw@0 942 pos = atoi(tmp) - 1;
jbe/bsw@0 943 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe/bsw@0 944 pos = utf8_position_to_byte(command, pos);
jbe/bsw@0 945 }
jbe/bsw@0 946 lua_pushinteger(L, pos + 1);
jbe/bsw@0 947 lua_setfield(L, 5, "position");
jbe/bsw@0 948 }
jbe/bsw@0 949 }
jbe/bsw@0 950 {
jbe/bsw@0 951 const char *internal_query;
jbe/bsw@0 952 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe/bsw@0 953 lua_pushstring(L, internal_query);
jbe/bsw@0 954 lua_setfield(L, 5, "pg_internal_query");
jbe/bsw@0 955 char *tmp;
jbe/bsw@0 956 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe/bsw@0 957 if (tmp) {
jbe/bsw@0 958 int pos;
jbe/bsw@0 959 pos = atoi(tmp) - 1;
jbe/bsw@0 960 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe/bsw@0 961 pos = utf8_position_to_byte(internal_query, pos);
jbe/bsw@0 962 }
jbe/bsw@0 963 lua_pushinteger(L, pos + 1);
jbe/bsw@0 964 lua_setfield(L, 5, "pg_internal_position");
jbe/bsw@0 965 }
jbe/bsw@0 966 }
jbe/bsw@0 967 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe/bsw@0 968 lua_setfield(L, 5, "pg_context");
jbe/bsw@0 969 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe/bsw@0 970 lua_setfield(L, 5, "pg_source_file");
jbe/bsw@0 971 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe/bsw@0 972 lua_setfield(L, 5, "pg_source_line");
jbe/bsw@0 973 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe/bsw@0 974 lua_setfield(L, 5, "pg_source_function");
jbe/bsw@0 975 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe/bsw@0 976 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe/bsw@0 977 lua_setfield(L, 5, "code");
jbe/bsw@0 978 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe/bsw@0 979 lua_setfield(L, 5, "message");
jbe/bsw@0 980 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 981 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe/bsw@0 982 lua_setfield(L, 5, "code");
jbe/bsw@0 983 lua_pushliteral(L, "Got more than one result row.");
jbe/bsw@0 984 lua_setfield(L, 5, "message");
jbe/bsw@0 985 } else {
jbe/bsw@0 986 // should not happen
jbe/bsw@0 987 abort();
jbe/bsw@0 988 }
jbe/bsw@0 989 if (res) {
jbe/bsw@0 990 PQclear(res);
jbe/bsw@0 991 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe/bsw@0 992 }
jbe/bsw@0 993 if (lua_toboolean(L, 3)) {
jbe/bsw@0 994 lua_pushvalue(L, 3);
jbe/bsw@0 995 lua_pushvalue(L, 5);
jbe/bsw@0 996 lua_call(L, 1, 0);
jbe/bsw@0 997 }
jbe/bsw@0 998 return 1;
jbe/bsw@0 999 }
jbe@23 1000 // call "create_list" or "create_object" method of database handle,
jbe@23 1001 // result will be at stack position 5:
jbe/bsw@0 1002 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1003 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1004 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1005 lua_call(L, 1, 1); // 5
jbe/bsw@0 1006 } else {
jbe/bsw@0 1007 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1008 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1009 lua_call(L, 1, 1); // 5
jbe/bsw@0 1010 }
jbe@23 1011 // set "_column_info":
jbe@23 1012 lua_newtable(L); // 6
jbe/bsw@0 1013 for (col = 0; col < cols; col++) {
jbe/bsw@0 1014 lua_newtable(L); // 7
jbe/bsw@0 1015 lua_pushstring(L, PQfname(res, col));
jbe/bsw@0 1016 lua_setfield(L, 7, "field_name");
jbe/bsw@0 1017 {
jbe/bsw@0 1018 Oid tmp;
jbe/bsw@0 1019 tmp = PQftable(res, col);
jbe/bsw@0 1020 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1021 else lua_pushinteger(L, tmp);
jbe/bsw@0 1022 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1023 }
jbe/bsw@0 1024 {
jbe/bsw@0 1025 int tmp;
jbe/bsw@0 1026 tmp = PQftablecol(res, col);
jbe/bsw@0 1027 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1028 else lua_pushinteger(L, tmp);
jbe/bsw@0 1029 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1030 }
jbe/bsw@0 1031 {
jbe/bsw@0 1032 Oid tmp;
jbe/bsw@0 1033 tmp = PQftype(res, col);
jbe/bsw@0 1034 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1035 lua_pushinteger(L, tmp);
jbe/bsw@0 1036 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1037 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1038 lua_setfield(L, 7, "type");
jbe/bsw@0 1039 }
jbe/bsw@0 1040 {
jbe/bsw@0 1041 int tmp;
jbe/bsw@0 1042 tmp = PQfmod(res, col);
jbe/bsw@0 1043 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1044 else lua_pushinteger(L, tmp);
jbe/bsw@0 1045 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1046 }
jbe/bsw@0 1047 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1048 }
jbe@23 1049 lua_setfield(L, 5, "_column_info");
jbe@23 1050 // set "_rows_affected":
jbe/bsw@0 1051 {
jbe/bsw@0 1052 char *tmp;
jbe/bsw@0 1053 tmp = PQcmdTuples(res);
jbe/bsw@0 1054 if (tmp[0]) {
jbe/bsw@0 1055 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1056 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1057 }
jbe/bsw@0 1058 }
jbe@23 1059 // set "_oid":
jbe/bsw@0 1060 {
jbe/bsw@0 1061 Oid tmp;
jbe/bsw@0 1062 tmp = PQoidValue(res);
jbe/bsw@0 1063 if (tmp != InvalidOid) {
jbe/bsw@0 1064 lua_pushinteger(L, tmp);
jbe/bsw@0 1065 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1066 }
jbe/bsw@0 1067 }
jbe@23 1068 // copy data as strings or nil, while performing binary unescaping
jbe@23 1069 // automatically:
jbe/bsw@0 1070 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1071 for (row = 0; row < rows; row++) {
jbe/bsw@0 1072 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1073 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1074 lua_call(L, 1, 1); // 6
jbe/bsw@0 1075 for (col = 0; col < cols; col++) {
jbe/bsw@0 1076 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1077 lua_pushnil(L);
jbe/bsw@0 1078 } else if (binary[col]) {
jbe/bsw@0 1079 size_t binlen;
jbe/bsw@0 1080 char *binval;
jbe/bsw@0 1081 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1082 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1083 );
jbe/bsw@0 1084 if (!binval) {
jbe/bsw@0 1085 return luaL_error(L,
jbe/bsw@0 1086 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1087 );
jbe/bsw@0 1088 }
jbe/bsw@0 1089 lua_pushlstring(L, binval, binlen);
jbe/bsw@0 1090 PQfreemem(binval);
jbe/bsw@0 1091 } else {
jbe/bsw@0 1092 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1093 }
jbe/bsw@0 1094 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1095 }
jbe/bsw@0 1096 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1097 }
jbe/bsw@0 1098 } else if (rows == 1) {
jbe/bsw@0 1099 for (col = 0; col < cols; col++) {
jbe/bsw@0 1100 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1101 lua_pushnil(L);
jbe/bsw@0 1102 } else if (binary[col]) {
jbe/bsw@0 1103 size_t binlen;
jbe/bsw@0 1104 char *binval;
jbe/bsw@0 1105 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1106 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1107 );
jbe/bsw@0 1108 if (!binval) {
jbe/bsw@0 1109 return luaL_error(L,
jbe/bsw@0 1110 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1111 );
jbe/bsw@0 1112 }
jbe/bsw@0 1113 lua_pushlstring(L, binval, binlen);
jbe/bsw@0 1114 PQfreemem(binval);
jbe/bsw@0 1115 } else {
jbe/bsw@0 1116 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1117 }
jbe/bsw@0 1118 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1119 }
jbe/bsw@0 1120 } else {
jbe/bsw@0 1121 // no row in optrow mode
jbe/bsw@0 1122 lua_pop(L, 1);
jbe/bsw@0 1123 lua_pushnil(L);
jbe/bsw@0 1124 }
jbe@23 1125 // save result in result list:
jbe/bsw@0 1126 lua_rawseti(L, 4, command_idx+1);
jbe@23 1127 // extra assertion:
jbe/bsw@0 1128 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1129 // free memory acquired by libpq:
jbe/bsw@0 1130 PQclear(res);
jbe/bsw@0 1131 }
jbe/bsw@0 1132 // trace callback at stack position 3
jbe/bsw@0 1133 // result at stack position 4 (top of stack)
jbe@23 1134 // if a trace callback is existent, then call:
jbe/bsw@0 1135 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1136 lua_pushvalue(L, 3);
jbe/bsw@0 1137 lua_call(L, 0, 0);
jbe/bsw@0 1138 }
jbe@23 1139 // put result at stack position 3:
jbe@23 1140 lua_replace(L, 3);
jbe@23 1141 // get output converter to stack position 4:
jbe@23 1142 lua_getfield(L, 1, "output_converter");
jbe@374 1143 // get mutability state saver to stack position 5:
jbe@375 1144 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1145 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1146 lua_replace(L, -2);
jbe@23 1147 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1148 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1149 int mode;
jbe/bsw@0 1150 mode = modes[command_idx];
jbe@374 1151 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1152 if (lua_toboolean(L, 6)) {
jbe@374 1153 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@64 1154 #if LUA_VERSION_NUM >= 502
jbe@374 1155 cols = lua_rawlen(L, 7);
jbe@64 1156 #else
jbe@374 1157 cols = lua_objlen(L, 7);
jbe@64 1158 #endif
jbe/bsw@0 1159 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@64 1160 #if LUA_VERSION_NUM >= 502
jbe@374 1161 rows = lua_rawlen(L, 6);
jbe@64 1162 #else
jbe@374 1163 rows = lua_objlen(L, 6);
jbe@64 1164 #endif
jbe/bsw@0 1165 for (row = 0; row < rows; row++) {
jbe@374 1166 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1167 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1168 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1169 for (col = 0; col < cols; col++) {
jbe@375 1170 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1171 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1172 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1173 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1174 lua_pushvalue(L, 1); // connection
jbe@374 1175 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1176 lua_pushvalue(L, 11); // this column info
jbe@375 1177 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1178 } else {
jbe@375 1179 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1180 }
jbe@375 1181 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1182 lua_pushvalue(L, 12); // copy of field name
jbe@375 1183 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1184 lua_pushvalue(L, 13); // copy of value
jbe@375 1185 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1186 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1187 }
jbe@375 1188 lua_pushvalue(L, 13); // 14
jbe@374 1189 lua_rawseti(L, 8, col+1);
jbe@374 1190 lua_rawset(L, 9);
jbe@374 1191 lua_settop(L, 9);
jbe/bsw@0 1192 }
jbe@374 1193 lua_settop(L, 7);
jbe/bsw@0 1194 }
jbe/bsw@0 1195 } else {
jbe@374 1196 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1197 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1198 for (col = 0; col < cols; col++) {
jbe@375 1199 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1200 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1201 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1202 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1203 lua_pushvalue(L, 1); // connection
jbe@374 1204 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1205 lua_pushvalue(L, 10); // this column info
jbe@375 1206 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1207 } else {
jbe@375 1208 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1209 }
jbe@375 1210 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1211 lua_pushvalue(L, 11); // copy of field name
jbe@375 1212 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1213 lua_pushvalue(L, 12); // copy of value
jbe@375 1214 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1215 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1216 }
jbe@375 1217 lua_pushvalue(L, 12); // 13
jbe@374 1218 lua_rawseti(L, 6, col+1);
jbe@374 1219 lua_rawset(L, 8);
jbe@374 1220 lua_settop(L, 8);
jbe/bsw@0 1221 }
jbe/bsw@0 1222 }
jbe/bsw@0 1223 }
jbe@374 1224 lua_settop(L, 5);
jbe/bsw@0 1225 }
jbe@23 1226 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1227 lua_settop(L, 3);
jbe/bsw@0 1228 lua_pushnil(L);
jbe/bsw@0 1229 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1230 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1231 }
jbe/bsw@0 1232 return command_count+1;
jbe/bsw@0 1233 }
jbe/bsw@0 1234
jbe@23 1235 // method "escalate" of error objects:
jbe/bsw@0 1236 static int mondelefant_errorobject_escalate(lua_State *L) {
jbe@23 1237 // check, if we may throw an error object instead of an error string:
jbe/bsw@0 1238 lua_settop(L, 1);
jbe/bsw@0 1239 lua_getfield(L, 1, "connection"); // 2
jbe/bsw@0 1240 lua_getfield(L, 2, "error_objects"); // 3
jbe/bsw@0 1241 if (lua_toboolean(L, 3)) {
jbe@23 1242 // throw error object:
jbe/bsw@0 1243 lua_settop(L, 1);
jbe/bsw@0 1244 return lua_error(L);
jbe/bsw@0 1245 } else {
jbe@23 1246 // throw error string:
jbe/bsw@0 1247 lua_getfield(L, 1, "message"); // 4
jbe/bsw@0 1248 if (lua_isnil(L, 4)) {
jbe/bsw@0 1249 return luaL_error(L, "No error message given for escalation.");
jbe/bsw@0 1250 }
jbe/bsw@0 1251 return lua_error(L);
jbe/bsw@0 1252 }
jbe/bsw@0 1253 }
jbe/bsw@0 1254
jbe@23 1255 // method "is_kind_of" of error objects:
jbe/bsw@0 1256 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe/bsw@0 1257 lua_settop(L, 2);
jbe/bsw@0 1258 lua_getfield(L, 1, "code"); // 3
jbe/bsw@0 1259 if (lua_isstring(L, 3)) {
jbe/bsw@0 1260 lua_pushboolean(L,
jbe/bsw@0 1261 mondelefant_check_error_class(
jbe/bsw@0 1262 lua_tostring(L, 3), luaL_checkstring(L, 2)
jbe/bsw@0 1263 )
jbe/bsw@0 1264 );
jbe/bsw@0 1265 } else {
jbe/bsw@0 1266 // only happens for errors where code is not set
jbe/bsw@0 1267 lua_pushboolean(L, 0);
jbe/bsw@0 1268 }
jbe/bsw@0 1269 return 1;
jbe/bsw@0 1270 }
jbe/bsw@0 1271
jbe@23 1272 // method "query" of database handles:
jbe/bsw@0 1273 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1274 int argc;
jbe@23 1275 // count number of arguments:
jbe/bsw@0 1276 argc = lua_gettop(L);
jbe@23 1277 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1278 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1279 lua_insert(L, 1);
jbe@23 1280 // call "try_query" method:
jbe@23 1281 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1282 // check, if error occurred:
jbe@23 1283 if (lua_toboolean(L, 1)) {
jbe@23 1284 // invoke escalate method of error object:
jbe/bsw@0 1285 lua_pushcfunction(L, mondelefant_errorobject_escalate);
jbe@23 1286 lua_pushvalue(L, 1);
jbe/bsw@0 1287 lua_call(L, 1, 0); // will raise an error
jbe/bsw@0 1288 return 0; // should not be executed
jbe/bsw@0 1289 } else {
jbe@23 1290 // return everything but nil error object:
jbe@23 1291 return lua_gettop(L) - 1;
jbe/bsw@0 1292 }
jbe/bsw@0 1293 }
jbe/bsw@0 1294
jbe@23 1295 // library function "set_class":
jbe/bsw@0 1296 static int mondelefant_set_class(lua_State *L) {
jbe@23 1297 // ensure that first argument is a database result list/object:
jbe/bsw@0 1298 lua_settop(L, 2);
jbe/bsw@0 1299 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1300 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1301 #if LUA_VERSION_NUM >= 502
jbe@64 1302 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@64 1303 #else
jbe/bsw@0 1304 luaL_argcheck(L, lua_equal(L, 3, 4), 1, "not a database result");
jbe@64 1305 #endif
jbe@23 1306 // ensure that second argument is a database class (model):
jbe/bsw@0 1307 lua_settop(L, 2);
jbe/bsw@0 1308 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1309 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1310 #if LUA_VERSION_NUM >= 502
jbe@64 1311 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@64 1312 #else
jbe/bsw@0 1313 luaL_argcheck(L, lua_equal(L, 3, 4), 2, "not a database class");
jbe@64 1314 #endif
jbe@23 1315 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1316 lua_settop(L, 2);
jbe/bsw@0 1317 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1318 lua_setfield(L, 1, "_class");
jbe@23 1319 // test, if database result is a list (and not a single object):
jbe/bsw@0 1320 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1321 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1322 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1323 int i;
jbe@23 1324 // set attribute "_class" of all elements to given class:
jbe@64 1325 #if LUA_VERSION_NUM >= 502
jbe@64 1326 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe@64 1327 #else
jbe/bsw@0 1328 for (i=0; i < lua_objlen(L, 1); i++) {
jbe@64 1329 #endif
jbe/bsw@0 1330 lua_settop(L, 2);
jbe/bsw@0 1331 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1332 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1333 lua_setfield(L, 3, "_class");
jbe/bsw@0 1334 }
jbe/bsw@0 1335 }
jbe@23 1336 // return first argument:
jbe/bsw@0 1337 lua_settop(L, 1);
jbe/bsw@0 1338 return 1;
jbe/bsw@0 1339 }
jbe/bsw@0 1340
jbe@23 1341 // library function "new_class":
jbe/bsw@0 1342 static int mondelefant_new_class(lua_State *L) {
jbe@23 1343 // use first argument as template or create new table:
jbe/bsw@0 1344 lua_settop(L, 1);
jbe/bsw@0 1345 if (!lua_toboolean(L, 1)) {
jbe/bsw@0 1346 lua_settop(L, 0);
jbe/bsw@0 1347 lua_newtable(L); // 1
jbe/bsw@0 1348 }
jbe@23 1349 // set meta-table for database classes (models):
jbe/bsw@0 1350 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe/bsw@0 1351 lua_setmetatable(L, 1);
jbe@23 1352 // check, if "prototype" attribute is not set:
jbe/bsw@0 1353 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1354 lua_rawget(L, 1); // 2
jbe/bsw@0 1355 if (!lua_toboolean(L, 2)) {
jbe@23 1356 // set "prototype" attribute to default prototype:
jbe/bsw@0 1357 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1358 lua_getfield(L,
jbe/bsw@0 1359 LUA_REGISTRYINDEX,
jbe/bsw@0 1360 MONDELEFANT_CLASS_PROTO_REGKEY
jbe/bsw@0 1361 ); // 4
jbe/bsw@0 1362 lua_rawset(L, 1);
jbe/bsw@0 1363 }
jbe@23 1364 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1365 lua_settop(L, 1);
jbe/bsw@0 1366 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1367 lua_rawget(L, 1); // 2
jbe/bsw@0 1368 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1369 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1370 lua_newtable(L); // 4
jbe/bsw@0 1371 lua_rawset(L, 1);
jbe/bsw@0 1372 }
jbe@23 1373 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1374 lua_settop(L, 1);
jbe/bsw@0 1375 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1376 lua_rawget(L, 1); // 2
jbe/bsw@0 1377 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1378 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1379 lua_newtable(L); // 4
jbe/bsw@0 1380 lua_rawset(L, 1);
jbe/bsw@0 1381 }
jbe@23 1382 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1383 lua_settop(L, 1);
jbe/bsw@0 1384 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1385 lua_rawget(L, 1); // 2
jbe/bsw@0 1386 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1387 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1388 lua_newtable(L); // 4
jbe/bsw@0 1389 lua_rawset(L, 1);
jbe/bsw@0 1390 }
jbe@23 1391 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1392 lua_settop(L, 1);
jbe/bsw@0 1393 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1394 lua_rawget(L, 1); // 2
jbe/bsw@0 1395 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1396 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1397 lua_newtable(L); // 4
jbe/bsw@0 1398 lua_rawset(L, 1);
jbe/bsw@0 1399 }
jbe@23 1400 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1401 lua_settop(L, 1);
jbe/bsw@0 1402 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1403 lua_rawget(L, 1); // 2
jbe/bsw@0 1404 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1405 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1406 lua_newtable(L); // 4
jbe/bsw@0 1407 lua_rawset(L, 1);
jbe/bsw@0 1408 }
jbe@23 1409 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1410 lua_settop(L, 1);
jbe/bsw@0 1411 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1412 lua_rawget(L, 1); // 2
jbe/bsw@0 1413 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1414 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1415 lua_newtable(L); // 4
jbe/bsw@0 1416 lua_rawset(L, 1);
jbe/bsw@0 1417 }
jbe@23 1418 // return table:
jbe/bsw@0 1419 lua_settop(L, 1);
jbe/bsw@0 1420 return 1;
jbe/bsw@0 1421 }
jbe/bsw@0 1422
jbe@23 1423 // method "get_reference" of classes (models):
jbe/bsw@0 1424 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1425 lua_settop(L, 2);
jbe/bsw@0 1426 while (lua_toboolean(L, 1)) {
jbe@23 1427 // get "references" table:
jbe/bsw@0 1428 lua_getfield(L, 1, "references"); // 3
jbe@23 1429 // perform lookup:
jbe/bsw@0 1430 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1431 lua_gettable(L, 3); // 4
jbe@23 1432 // return result, if lookup was successful:
jbe/bsw@0 1433 if (!lua_isnil(L, 4)) return 1;
jbe@23 1434 // replace current table by its prototype:
jbe/bsw@0 1435 lua_settop(L, 2);
jbe/bsw@0 1436 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1437 lua_rawget(L, 1); // 3
jbe/bsw@0 1438 lua_replace(L, 1);
jbe/bsw@0 1439 }
jbe@23 1440 // return nothing:
jbe/bsw@0 1441 return 0;
jbe/bsw@0 1442 }
jbe/bsw@0 1443
jbe@23 1444 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1445 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1446 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1447 }
jbe/bsw@0 1448
jbe@23 1449 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1450 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1451 lua_settop(L, 2);
jbe/bsw@0 1452 while (lua_toboolean(L, 1)) {
jbe@23 1453 // get "foreign_keys" table:
jbe/bsw@0 1454 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1455 // perform lookup:
jbe/bsw@0 1456 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1457 lua_gettable(L, 3); // 4
jbe@23 1458 // return result, if lookup was successful:
jbe/bsw@0 1459 if (!lua_isnil(L, 4)) return 1;
jbe@23 1460 // replace current table by its prototype:
jbe/bsw@0 1461 lua_settop(L, 2);
jbe/bsw@0 1462 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1463 lua_rawget(L, 1); // 3
jbe/bsw@0 1464 lua_replace(L, 1);
jbe/bsw@0 1465 }
jbe@23 1466 // return nothing:
jbe/bsw@0 1467 return 0;
jbe/bsw@0 1468 }
jbe/bsw@0 1469
jbe@23 1470 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1471 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1472 const char *result_type;
jbe@23 1473 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1474 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1475 return 0;
jbe/bsw@0 1476 }
jbe@23 1477 // get value of "_class" attribute, or default class, when unset:
jbe@23 1478 lua_settop(L, 2);
jbe/bsw@0 1479 lua_getfield(L, 1, "_class"); // 3
jbe/bsw@0 1480 if (!lua_toboolean(L, 3)) {
jbe/bsw@0 1481 lua_settop(L, 2);
jbe/bsw@0 1482 lua_getfield(L,
jbe/bsw@0 1483 LUA_REGISTRYINDEX,
jbe/bsw@0 1484 MONDELEFANT_CLASS_PROTO_REGKEY
jbe/bsw@0 1485 ); // 3
jbe/bsw@0 1486 }
jbe@23 1487 // get value of "_type" attribute:
jbe/bsw@0 1488 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1489 result_type = lua_tostring(L, 4);
jbe@23 1490 // different lookup for lists and objects:
jbe@23 1491 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1492 lua_settop(L, 3);
jbe@376 1493 lua_pushnil(L);
jbe@376 1494 lua_insert(L, 3); // optional document column name on stack position 3
jbe@376 1495 // try inherited attributes, methods or getter functions
jbe@376 1496 // (and determine optional document column, if existent):
jbe@376 1497 while (lua_toboolean(L, 4)) { // class on stack position 4 (due to insert)
jbe@376 1498 lua_getfield(L, 4, "object"); // 5
jbe@376 1499 lua_pushvalue(L, 2); // 6
jbe@376 1500 lua_gettable(L, 5); // 6
jbe@376 1501 if (!lua_isnil(L, 6)) return 1;
jbe@376 1502 lua_settop(L, 4);
jbe@376 1503 lua_getfield(L, 4, "object_get"); // 5
jbe@376 1504 lua_pushvalue(L, 2); // 6
jbe@376 1505 lua_gettable(L, 5); // 6
jbe@376 1506 if (lua_toboolean(L, 6)) {
jbe@376 1507 lua_pushvalue(L, 1); // 7
jbe@376 1508 lua_call(L, 1, 1); // 6
jbe/bsw@0 1509 return 1;
jbe/bsw@0 1510 }
jbe@376 1511 lua_settop(L, 4);
jbe@376 1512 if (lua_isnil(L, 3)) {
jbe@376 1513 lua_getfield(L, 4, "document_column"); // 5
jbe@376 1514 lua_replace(L, 3);
jbe@376 1515 }
jbe@376 1516 lua_pushliteral(L, "prototype"); // 5
jbe@376 1517 lua_rawget(L, 4); // 5
jbe@376 1518 lua_replace(L, 4);
jbe/bsw@0 1519 }
jbe@376 1520 lua_settop(L, 3);
jbe/bsw@0 1521 // try primary keys of referenced objects:
jbe/bsw@0 1522 lua_pushcfunction(L,
jbe/bsw@0 1523 mondelefant_class_get_foreign_key_reference_name
jbe@376 1524 ); // 4
jbe@376 1525 lua_getfield(L, 1, "_class"); // 5
jbe@376 1526 lua_pushvalue(L, 2); // 6
jbe@376 1527 lua_call(L, 2, 1); // 4
jbe@376 1528 if (!lua_isnil(L, 4)) {
jbe@376 1529 // reference name at stack position 4
jbe@376 1530 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@376 1531 lua_getfield(L, 1, "_class"); // 6
jbe@376 1532 lua_pushvalue(L, 4); // 7
jbe@376 1533 lua_call(L, 2, 1); // reference info at stack position 5
jbe@376 1534 lua_getfield(L, 1, "_ref"); // 6
jbe@376 1535 lua_getfield(L, 4, "ref"); // 7
jbe@376 1536 lua_gettable(L, 6); // 7
jbe@376 1537 if (!lua_isnil(L, 7)) {
jbe@376 1538 if (lua_toboolean(L, 7)) {
jbe@376 1539 lua_getfield(L, 5, "that_key"); // 8
jbe@376 1540 if (lua_isnil(L, 8)) {
jbe/bsw@0 1541 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1542 }
jbe@376 1543 lua_gettable(L, 7); // 8
jbe/bsw@0 1544 } else {
jbe/bsw@0 1545 lua_pushnil(L);
jbe/bsw@0 1546 }
jbe/bsw@0 1547 return 1;
jbe/bsw@0 1548 }
jbe/bsw@0 1549 }
jbe@376 1550 lua_settop(L, 3);
jbe/bsw@0 1551 // try normal data field info:
jbe@377 1552 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe@376 1553 lua_pushvalue(L, 2); // 5
jbe@376 1554 lua_gettable(L, 4); // 5
jbe@376 1555 if (!lua_isnil(L, 5)) return 1;
jbe@377 1556 lua_settop(L, 4); // _data table kept on stack position 4 for later use
jbe/bsw@0 1557 // try cached referenced object (or cached NULL reference):
jbe@377 1558 lua_getfield(L, 1, "_ref"); // 5
jbe@377 1559 lua_pushvalue(L, 2); // 6
jbe@377 1560 lua_gettable(L, 5); // 6
jbe@377 1561 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1562 lua_pushnil(L);
jbe/bsw@0 1563 return 1;
jbe@377 1564 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1565 return 1;
jbe/bsw@0 1566 }
jbe@377 1567 lua_settop(L, 4);
jbe/bsw@0 1568 // try to load a referenced object:
jbe@377 1569 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@377 1570 lua_getfield(L, 1, "_class"); // 6
jbe@377 1571 lua_pushvalue(L, 2); // 7
jbe@377 1572 lua_call(L, 2, 1); // 5
jbe@377 1573 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1574 lua_settop(L, 2);
jbe/bsw@0 1575 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1576 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1577 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1578 lua_call(L, 2, 0);
jbe/bsw@0 1579 lua_settop(L, 2);
jbe/bsw@0 1580 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1581 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1582 lua_gettable(L, 3); // 4
jbe/bsw@0 1583 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1584 return 1;
jbe/bsw@0 1585 }
jbe@377 1586 lua_settop(L, 4);
jbe@376 1587 // try proxy access to document in special column:
jbe@376 1588 if (lua_toboolean(L, 3)) {
jbe@377 1589 lua_insert(L, 3); // switch stack values on position 3 and 4
jbe@377 1590 // _data table is on stack position 3
jbe@377 1591 // document column name is on stack position 4
jbe@376 1592 lua_gettable(L, 3); // 4
jbe@376 1593 if (!lua_isnil(L, 4)) {
jbe@376 1594 lua_pushvalue(L, 2); // 5
jbe@376 1595 lua_gettable(L, 4); // 5
jbe@376 1596 if (!lua_isnil(L, 5)) return 1;
jbe@376 1597 }
jbe@376 1598 }
jbe/bsw@0 1599 return 0;
jbe@23 1600 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1601 lua_settop(L, 3);
jbe/bsw@0 1602 // try inherited list attributes or methods:
jbe/bsw@0 1603 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1604 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1605 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1606 lua_gettable(L, 4); // 5
jbe/bsw@0 1607 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1608 lua_settop(L, 3);
jbe/bsw@0 1609 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1610 lua_rawget(L, 3); // 4
jbe/bsw@0 1611 lua_replace(L, 3);
jbe/bsw@0 1612 }
jbe/bsw@0 1613 }
jbe@23 1614 // return nothing:
jbe/bsw@0 1615 return 0;
jbe/bsw@0 1616 }
jbe/bsw@0 1617
jbe@23 1618 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1619 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1620 const char *result_type;
jbe@23 1621 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1622 lua_settop(L, 3);
jbe/bsw@0 1623 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1624 lua_rawset(L, 1);
jbe/bsw@0 1625 return 1;
jbe/bsw@0 1626 }
jbe@23 1627 // get value of "_class" attribute, or default class, when unset:
jbe/bsw@0 1628 lua_getfield(L, 1, "_class"); // 4
jbe/bsw@0 1629 if (!lua_toboolean(L, 4)) {
jbe/bsw@0 1630 lua_settop(L, 3);
jbe/bsw@0 1631 lua_getfield(L,
jbe/bsw@0 1632 LUA_REGISTRYINDEX,
jbe/bsw@0 1633 MONDELEFANT_CLASS_PROTO_REGKEY
jbe/bsw@0 1634 ); // 4
jbe/bsw@0 1635 }
jbe@23 1636 // get value of "_type" attribute:
jbe/bsw@0 1637 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1638 result_type = lua_tostring(L, 5);
jbe@378 1639
jbe@378 1640
jbe@378 1641 lua_settop(L, 3);
jbe@378 1642 lua_pushnil(L);
jbe@378 1643 lua_insert(L, 3); // optional document column name on stack position 3
jbe@378 1644 // try inherited attributes, methods or getter functions
jbe@378 1645 // (and determine optional document column, if existent):
jbe@378 1646 while (lua_toboolean(L, 4)) { // class on stack position 4 (due to insert)
jbe@378 1647 lua_getfield(L, 4, "object"); // 5
jbe@378 1648 lua_pushvalue(L, 2); // 6
jbe@378 1649 lua_gettable(L, 5); // 6
jbe@378 1650 if (!lua_isnil(L, 6)) return 1;
jbe@378 1651 lua_settop(L, 4);
jbe@378 1652 lua_getfield(L, 4, "object_get"); // 5
jbe/bsw@0 1653 lua_pushvalue(L, 2); // 6
jbe/bsw@0 1654 lua_gettable(L, 5); // 6
jbe/bsw@0 1655 if (lua_toboolean(L, 6)) {
jbe/bsw@0 1656 lua_pushvalue(L, 1); // 7
jbe@378 1657 lua_call(L, 1, 1); // 6
jbe@378 1658 return 1;
jbe/bsw@0 1659 }
jbe/bsw@0 1660 lua_settop(L, 4);
jbe@378 1661 if (lua_isnil(L, 3)) {
jbe@378 1662 lua_getfield(L, 4, "document_column"); // 5
jbe@378 1663 lua_replace(L, 3);
jbe@378 1664 }
jbe/bsw@0 1665 lua_pushliteral(L, "prototype"); // 5
jbe/bsw@0 1666 lua_rawget(L, 4); // 5
jbe/bsw@0 1667 lua_replace(L, 4);
jbe/bsw@0 1668 }
jbe/bsw@0 1669 lua_settop(L, 3);
jbe@378 1670
jbe@378 1671 // distinguish between lists and objects:
jbe@378 1672 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1673 lua_settop(L, 4);
jbe@378 1674 lua_pushnil(L);
jbe@378 1675 lua_insert(L, 4); // optional document column name on stack position 4
jbe@378 1676 // try object setter functions:
jbe@378 1677 // (and determine optional document column, if existent):
jbe@378 1678 while (lua_toboolean(L, 5)) { // class on stack position 5 (due to insert)
jbe@378 1679 lua_getfield(L, 5, "object_set"); // 6
jbe@378 1680 lua_pushvalue(L, 2); // 7
jbe@378 1681 lua_gettable(L, 6); // 7
jbe@378 1682 if (lua_toboolean(L, 7)) {
jbe@378 1683 lua_pushvalue(L, 1); // 8
jbe@378 1684 lua_pushvalue(L, 3); // 9
jbe@378 1685 lua_call(L, 2, 0);
jbe@378 1686 return 0;
jbe@378 1687 }
jbe@378 1688 lua_settop(L, 5);
jbe@378 1689 lua_pushliteral(L, "prototype"); // 6
jbe@378 1690 lua_rawget(L, 5); // 6
jbe@378 1691 lua_replace(L, 5);
jbe@378 1692 }
jbe@378 1693 lua_settop(L, 4);
jbe@378 1694 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1695 // check, if a object reference is changed:
jbe@378 1696 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@378 1697 lua_getfield(L, 1, "_class"); // 7
jbe@378 1698 lua_pushvalue(L, 2); // 8
jbe@378 1699 lua_call(L, 2, 1); // 6
jbe@378 1700 if (!lua_isnil(L, 6)) {
jbe/bsw@0 1701 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@378 1702 lua_getfield(L, 1, "_ref"); // 7
jbe@378 1703 lua_pushvalue(L, 2); // 8
jbe@378 1704 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@378 1705 else lua_pushvalue(L, 3); // 9
jbe@378 1706 lua_settable(L, 7);
jbe@378 1707 lua_settop(L, 6);
jbe/bsw@0 1708 // delete referencing key from _data table:
jbe@378 1709 lua_getfield(L, 6, "this_key"); // 7
jbe@378 1710 if (lua_isnil(L, 7)) {
jbe/bsw@0 1711 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1712 }
jbe@378 1713 //lua_getfield(L, 1, "_data"); // 6
jbe@378 1714 lua_pushvalue(L, 7); // 8
jbe@378 1715 lua_pushnil(L); // 9
jbe@378 1716 lua_settable(L, 5);
jbe@378 1717 lua_settop(L, 7);
jbe@378 1718 lua_getfield(L, 1, "_dirty"); // 8
jbe@378 1719 lua_pushvalue(L, 7); // 9
jbe@378 1720 lua_pushboolean(L, 1); // 10
jbe@378 1721 lua_settable(L, 5);
jbe/bsw@0 1722 return 0;
jbe/bsw@0 1723 }
jbe@378 1724 lua_settop(L, 5);
jbe/bsw@0 1725 // store value in data field info:
jbe@378 1726 lua_pushvalue(L, 2); // 6
jbe@378 1727 lua_pushvalue(L, 3); // 7
jbe@378 1728 lua_settable(L, 5);
jbe/bsw@0 1729 lua_settop(L, 3);
jbe/bsw@0 1730 // mark field as dirty (needs to be UPDATEd on save):
jbe/bsw@0 1731 lua_getfield(L, 1, "_dirty"); // 4
jbe/bsw@0 1732 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1733 lua_pushboolean(L, 1); // 6
jbe/bsw@0 1734 lua_settable(L, 4);
jbe/bsw@0 1735 lua_settop(L, 3);
jbe/bsw@0 1736 // reset reference cache, if neccessary:
jbe/bsw@0 1737 lua_pushcfunction(L,
jbe/bsw@0 1738 mondelefant_class_get_foreign_key_reference_name
jbe/bsw@0 1739 ); // 4
jbe/bsw@0 1740 lua_getfield(L, 1, "_class"); // 5
jbe/bsw@0 1741 lua_pushvalue(L, 2); // 6
jbe/bsw@0 1742 lua_call(L, 2, 1); // 4
jbe/bsw@0 1743 if (!lua_isnil(L, 4)) {
jbe/bsw@0 1744 lua_getfield(L, 1, "_ref"); // 5
jbe/bsw@0 1745 lua_pushvalue(L, 4); // 6
jbe/bsw@0 1746 lua_pushnil(L); // 7
jbe/bsw@0 1747 lua_settable(L, 5);
jbe/bsw@0 1748 }
jbe/bsw@0 1749 return 0;
jbe@23 1750 } else { // non-objects (i.e. lists)
jbe@23 1751 // perform rawset:
jbe/bsw@0 1752 lua_settop(L, 3);
jbe/bsw@0 1753 lua_rawset(L, 1);
jbe/bsw@0 1754 return 0;
jbe/bsw@0 1755 }
jbe/bsw@0 1756 }
jbe/bsw@0 1757
jbe@23 1758 // meta-method "__index" of classes (models):
jbe/bsw@0 1759 static int mondelefant_class_index(lua_State *L) {
jbe@23 1760 // perform lookup in prototype:
jbe/bsw@0 1761 lua_settop(L, 2);
jbe/bsw@0 1762 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1763 lua_rawget(L, 1); // 3
jbe/bsw@0 1764 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1765 lua_gettable(L, 3); // 4
jbe/bsw@0 1766 return 1;
jbe/bsw@0 1767 }
jbe/bsw@0 1768
jbe@23 1769 // registration information for functions of library:
jbe/bsw@0 1770 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1771 {"connect", mondelefant_connect},
jbe/bsw@0 1772 {"set_class", mondelefant_set_class},
jbe/bsw@0 1773 {"new_class", mondelefant_new_class},
jbe/bsw@0 1774 {NULL, NULL}
jbe/bsw@0 1775 };
jbe/bsw@0 1776
jbe@23 1777 // registration information for meta-methods of database connections:
jbe/bsw@0 1778 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1779 {"__gc", mondelefant_conn_free},
jbe/bsw@0 1780 {"__index", mondelefant_conn_index},
jbe/bsw@0 1781 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 1782 {NULL, NULL}
jbe/bsw@0 1783 };
jbe/bsw@0 1784
jbe@23 1785 // registration information for methods of database connections:
jbe/bsw@0 1786 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 1787 {"close", mondelefant_conn_close},
jbe/bsw@0 1788 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 1789 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe/bsw@0 1790 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 1791 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 1792 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 1793 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 1794 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 1795 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 1796 {"query", mondelefant_conn_query},
jbe/bsw@0 1797 {NULL, NULL}
jbe/bsw@0 1798 };
jbe/bsw@0 1799
jbe@23 1800 // registration information for meta-methods of error objects:
jbe/bsw@0 1801 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe/bsw@0 1802 {NULL, NULL}
jbe/bsw@0 1803 };
jbe/bsw@0 1804
jbe@23 1805 // registration information for methods of error objects:
jbe/bsw@0 1806 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe/bsw@0 1807 {"escalate", mondelefant_errorobject_escalate},
jbe/bsw@0 1808 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 1809 {NULL, NULL}
jbe/bsw@0 1810 };
jbe/bsw@0 1811
jbe@23 1812 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 1813 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 1814 {"__index", mondelefant_result_index},
jbe/bsw@0 1815 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 1816 {NULL, NULL}
jbe/bsw@0 1817 };
jbe/bsw@0 1818
jbe@23 1819 // registration information for methods of database result lists/objects:
jbe/bsw@0 1820 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 1821 {"__index", mondelefant_class_index},
jbe/bsw@0 1822 {NULL, NULL}
jbe/bsw@0 1823 };
jbe/bsw@0 1824
jbe@23 1825 // registration information for methods of classes (models):
jbe/bsw@0 1826 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 1827 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 1828 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 1829 {"get_foreign_key_reference_name",
jbe/bsw@0 1830 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 1831 {NULL, NULL}
jbe/bsw@0 1832 };
jbe/bsw@0 1833
jbe@23 1834 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 1835 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 1836 {NULL, NULL}
jbe/bsw@0 1837 };
jbe/bsw@0 1838
jbe@23 1839 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 1840 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 1841 {NULL, NULL}
jbe/bsw@0 1842 };
jbe/bsw@0 1843
jbe@23 1844 // luaopen function to initialize/register library:
jbe/bsw@0 1845 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 1846 lua_settop(L, 0);
jbe/bsw@0 1847 lua_newtable(L); // module at stack position 1
jbe@64 1848 #if LUA_VERSION_NUM >= 502
jbe@64 1849 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe@64 1850 #else
jbe/bsw@0 1851 luaL_register(L, NULL, mondelefant_module_functions);
jbe@64 1852 #endif
jbe/bsw@0 1853
jbe/bsw@0 1854 lua_pushvalue(L, 1); // 2
jbe/bsw@0 1855 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 1856
jbe/bsw@0 1857 lua_newtable(L); // 2
jbe/bsw@0 1858 // NOTE: only PostgreSQL is supported yet:
jbe@64 1859 #if LUA_VERSION_NUM >= 502
jbe@64 1860 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe@64 1861 #else
jbe/bsw@0 1862 luaL_register(L, NULL, mondelefant_conn_methods);
jbe@64 1863 #endif
jbe/bsw@0 1864 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 1865 lua_newtable(L); // 2
jbe/bsw@0 1866 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 1867
jbe/bsw@0 1868 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 1869 #if LUA_VERSION_NUM >= 502
jbe@64 1870 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe@64 1871 #else
jbe/bsw@0 1872 luaL_register(L, NULL, mondelefant_conn_mt_functions);
jbe@64 1873 #endif
jbe/bsw@0 1874 lua_settop(L, 1);
jbe/bsw@0 1875 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 1876 #if LUA_VERSION_NUM >= 502
jbe@64 1877 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe@64 1878 #else
jbe/bsw@0 1879 luaL_register(L, NULL, mondelefant_result_mt_functions);
jbe@64 1880 #endif
jbe/bsw@0 1881 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 1882 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 1883 #if LUA_VERSION_NUM >= 502
jbe@64 1884 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe@64 1885 #else
jbe/bsw@0 1886 luaL_register(L, NULL, mondelefant_class_mt_functions);
jbe@64 1887 #endif
jbe/bsw@0 1888 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 1889
jbe/bsw@0 1890 lua_newtable(L); // 2
jbe@272 1891 #if LUA_VERSION_NUM >= 502
jbe@272 1892 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe@272 1893 #else
jbe@272 1894 luaL_register(L, NULL, mondelefant_class_methods);
jbe@272 1895 #endif
jbe/bsw@0 1896 lua_newtable(L); // 3
jbe@64 1897 #if LUA_VERSION_NUM >= 502
jbe@64 1898 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe@64 1899 #else
jbe/bsw@0 1900 luaL_register(L, NULL, mondelefant_object_methods);
jbe@64 1901 #endif
jbe/bsw@0 1902 lua_setfield(L, 2, "object");
jbe/bsw@0 1903 lua_newtable(L); // 3
jbe/bsw@0 1904 lua_setfield(L, 2, "object_get");
jbe/bsw@0 1905 lua_newtable(L); // 3
jbe/bsw@0 1906 lua_setfield(L, 2, "object_set");
jbe/bsw@0 1907 lua_newtable(L); // 3
jbe@64 1908 #if LUA_VERSION_NUM >= 502
jbe@64 1909 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe@64 1910 #else
jbe/bsw@0 1911 luaL_register(L, NULL, mondelefant_list_methods);
jbe@64 1912 #endif
jbe/bsw@0 1913 lua_setfield(L, 2, "list");
jbe/bsw@0 1914 lua_newtable(L); // 3
jbe/bsw@0 1915 lua_setfield(L, 2, "references");
jbe/bsw@0 1916 lua_newtable(L); // 3
jbe/bsw@0 1917 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 1918 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1919 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 1920 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 1921
jbe/bsw@0 1922 lua_newtable(L); // 2
jbe/bsw@0 1923 lua_pushliteral(L, "k"); // 3
jbe/bsw@0 1924 lua_setfield(L, 2, "__mode");
jbe/bsw@0 1925 lua_newtable(L); // 3
jbe/bsw@0 1926 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1927 lua_setmetatable(L, 3);
jbe/bsw@0 1928 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY);
jbe/bsw@0 1929 lua_settop(L, 1);
jbe/bsw@0 1930
jbe/bsw@0 1931 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 1932 #if LUA_VERSION_NUM >= 502
jbe@64 1933 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe@64 1934 #else
jbe/bsw@0 1935 luaL_register(L, NULL, mondelefant_errorobject_mt_functions);
jbe@64 1936 #endif
jbe/bsw@0 1937 lua_newtable(L); // 3
jbe@64 1938 #if LUA_VERSION_NUM >= 502
jbe@64 1939 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe@64 1940 #else
jbe/bsw@0 1941 luaL_register(L, NULL, mondelefant_errorobject_methods);
jbe@64 1942 #endif
jbe/bsw@0 1943 lua_setfield(L, 2, "__index");
jbe/bsw@0 1944 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 1945
jbe/bsw@0 1946 return 1;
jbe/bsw@0 1947 }

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