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annotate libraries/mondelefant/mondelefant_native.c @ 413:a09a0defb48a

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Removed some line-breaks
author jbe
date Sat Jan 09 03:30:51 2016 +0100 (2016-01-09)
parents 7d43be9afa56
children 015be25c98dd
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@402 12 #define MONDELEFANT_REGKEY "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@408 31 void *todo_PQfreemem;
jbe@408 32 PGresult *todo_PQclear;
jbe/bsw@0 33 } mondelefant_conn_t;
jbe@23 34 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
jbe@23 35 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
jbe/bsw@0 36
jbe@23 37 // transform codepoint-position to byte-position for a given UTF-8 string:
jbe/bsw@0 38 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
jbe/bsw@0 39 size_t bytepos;
jbe/bsw@0 40 for (bytepos = 0; utf8pos > 0; bytepos++) {
jbe/bsw@0 41 uint8_t c;
jbe/bsw@0 42 c = ((const uint8_t *)str)[bytepos];
jbe/bsw@0 43 if (!c) break;
jbe/bsw@0 44 if (c <= 0x7f || c >= 0xc0) utf8pos--;
jbe/bsw@0 45 }
jbe/bsw@0 46 return bytepos;
jbe/bsw@0 47 }
jbe/bsw@0 48
jbe@23 49 // PostgreSQL's OID for binary data type (bytea):
jbe/bsw@0 50 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
jbe/bsw@0 51
jbe@23 52 // mapping a PostgreSQL type given by its OID to a string identifier:
jbe/bsw@0 53 static const char *mondelefant_oid_to_typestr(Oid oid) {
jbe/bsw@0 54 switch (oid) {
jbe/bsw@0 55 case 16: return "bool";
jbe/bsw@0 56 case 17: return "bytea";
jbe/bsw@0 57 case 18: return "char";
jbe/bsw@0 58 case 19: return "name";
jbe/bsw@0 59 case 20: return "int8";
jbe/bsw@0 60 case 21: return "int2";
jbe/bsw@0 61 case 23: return "int4";
jbe/bsw@0 62 case 25: return "text";
jbe/bsw@0 63 case 26: return "oid";
jbe/bsw@0 64 case 27: return "tid";
jbe/bsw@0 65 case 28: return "xid";
jbe/bsw@0 66 case 29: return "cid";
jbe@176 67 case 114: return "json";
jbe/bsw@0 68 case 600: return "point";
jbe/bsw@0 69 case 601: return "lseg";
jbe/bsw@0 70 case 602: return "path";
jbe/bsw@0 71 case 603: return "box";
jbe/bsw@0 72 case 604: return "polygon";
jbe/bsw@0 73 case 628: return "line";
jbe/bsw@0 74 case 700: return "float4";
jbe/bsw@0 75 case 701: return "float8";
jbe/bsw@0 76 case 705: return "unknown";
jbe/bsw@0 77 case 718: return "circle";
jbe/bsw@0 78 case 790: return "money";
jbe/bsw@0 79 case 829: return "macaddr";
jbe/bsw@0 80 case 869: return "inet";
jbe/bsw@0 81 case 650: return "cidr";
jbe/bsw@0 82 case 1042: return "bpchar";
jbe/bsw@0 83 case 1043: return "varchar";
jbe/bsw@0 84 case 1082: return "date";
jbe/bsw@0 85 case 1083: return "time";
jbe/bsw@0 86 case 1114: return "timestamp";
jbe/bsw@0 87 case 1184: return "timestamptz";
jbe/bsw@0 88 case 1186: return "interval";
jbe/bsw@0 89 case 1266: return "timetz";
jbe/bsw@0 90 case 1560: return "bit";
jbe/bsw@0 91 case 1562: return "varbit";
jbe/bsw@0 92 case 1700: return "numeric";
jbe@176 93 case 3802: return "jsonb";
jbe/bsw@0 94 default: return NULL;
jbe/bsw@0 95 }
jbe/bsw@0 96 }
jbe/bsw@0 97
jbe@23 98 // This library maps PostgreSQL's error codes to CamelCase string
jbe@23 99 // identifiers, which consist of CamelCase identifiers and are seperated
jbe@23 100 // by dots (".") (no leading or trailing dots).
jbe@23 101 // There are additional error identifiers which do not have a corresponding
jbe@23 102 // PostgreSQL error associated with it.
jbe@23 103
jbe@23 104 // matching start of local variable 'pgcode' against string 'incode',
jbe@23 105 // returning string 'outcode' on match:
jbe/bsw@0 106 #define mondelefant_errcode_item(incode, outcode) \
jbe/bsw@0 107 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
jbe/bsw@0 108
jbe@23 109 // additional error identifiers without corresponding PostgreSQL error:
jbe/bsw@0 110 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
jbe/bsw@0 111 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
jbe/bsw@0 112 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
jbe/bsw@0 113 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
jbe/bsw@0 114 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
jbe/bsw@0 115 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
jbe/bsw@0 116
jbe@23 117 // mapping PostgreSQL error code to error code as returned by this library:
jbe/bsw@0 118 static const char *mondelefant_translate_errcode(const char *pgcode) {
jbe/bsw@0 119 if (!pgcode) abort(); // should not happen
jbe/bsw@0 120 mondelefant_errcode_item("02", "NoData")
jbe/bsw@0 121 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
jbe/bsw@0 122 mondelefant_errcode_item("08", "ConnectionException")
jbe/bsw@0 123 mondelefant_errcode_item("09", "TriggeredActionException")
jbe/bsw@0 124 mondelefant_errcode_item("0A", "FeatureNotSupported")
jbe/bsw@0 125 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
jbe/bsw@0 126 mondelefant_errcode_item("0F", "LocatorException")
jbe/bsw@0 127 mondelefant_errcode_item("0L", "InvalidGrantor")
jbe/bsw@0 128 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
jbe/bsw@0 129 mondelefant_errcode_item("21", "CardinalityViolation")
jbe/bsw@0 130 mondelefant_errcode_item("22", "DataException")
jbe/bsw@0 131 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
jbe/bsw@0 132 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
jbe/bsw@0 133 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
jbe/bsw@0 134 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
jbe/bsw@0 135 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
jbe/bsw@0 136 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
jbe/bsw@0 137 mondelefant_errcode_item("24", "InvalidCursorState")
jbe/bsw@0 138 mondelefant_errcode_item("25", "InvalidTransactionState")
jbe/bsw@0 139 mondelefant_errcode_item("26", "InvalidSqlStatementName")
jbe/bsw@0 140 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
jbe/bsw@0 141 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
jbe/bsw@0 142 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
jbe/bsw@0 143 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
jbe/bsw@0 144 mondelefant_errcode_item("2F", "SqlRoutineException")
jbe/bsw@0 145 mondelefant_errcode_item("34", "InvalidCursorName")
jbe/bsw@0 146 mondelefant_errcode_item("38", "ExternalRoutineException")
jbe/bsw@0 147 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
jbe/bsw@0 148 mondelefant_errcode_item("3B", "SavepointException")
jbe/bsw@0 149 mondelefant_errcode_item("3D", "InvalidCatalogName")
jbe/bsw@0 150 mondelefant_errcode_item("3F", "InvalidSchemaName")
jbe/bsw@0 151 mondelefant_errcode_item("40", "TransactionRollback")
jbe/bsw@0 152 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
jbe/bsw@0 153 mondelefant_errcode_item("44", "WithCheckOptionViolation")
jbe/bsw@0 154 mondelefant_errcode_item("53", "InsufficientResources")
jbe/bsw@0 155 mondelefant_errcode_item("54", "ProgramLimitExceeded")
jbe/bsw@0 156 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
jbe/bsw@0 157 mondelefant_errcode_item("57", "OperatorIntervention")
jbe/bsw@0 158 mondelefant_errcode_item("58", "SystemError")
jbe/bsw@0 159 mondelefant_errcode_item("F0", "ConfigurationFileError")
jbe/bsw@0 160 mondelefant_errcode_item("P0", "PlpgsqlError")
jbe/bsw@0 161 mondelefant_errcode_item("XX", "InternalError")
jbe/bsw@0 162 return "unknown";
jbe/bsw@0 163 }
jbe/bsw@0 164
jbe@23 165 // C-function, checking if a given error code (as defined by this library)
jbe@23 166 // is belonging to a certain class of errors (strings are equal or error
jbe@23 167 // code begins with error class followed by a dot):
jbe/bsw@0 168 static int mondelefant_check_error_class(
jbe/bsw@0 169 const char *errcode, const char *errclass
jbe/bsw@0 170 ) {
jbe/bsw@0 171 size_t i = 0;
jbe/bsw@0 172 while (1) {
jbe/bsw@0 173 if (errclass[i] == 0) {
jbe/bsw@0 174 if (errcode[i] == 0 || errcode[i] == '.') return 1;
jbe/bsw@0 175 else return 0;
jbe/bsw@0 176 }
jbe/bsw@0 177 if (errcode[i] != errclass[i]) return 0;
jbe/bsw@0 178 i++;
jbe/bsw@0 179 }
jbe/bsw@0 180 }
jbe/bsw@0 181
jbe@23 182 // pushing first line of a string on Lua's stack (without trailing CR/LF):
jbe/bsw@0 183 static void mondelefant_push_first_line(lua_State *L, const char *str) {
jbe/bsw@0 184 size_t i = 0;
jbe/bsw@0 185 if (!str) abort(); // should not happen
jbe/bsw@0 186 while (1) {
jbe@397 187 char c = str[i];
jbe@397 188 if (c == '\n' || c == '\r' || c == 0) {
jbe@397 189 lua_pushlstring(L, str, i);
jbe@397 190 return;
jbe@397 191 }
jbe/bsw@0 192 i++;
jbe@397 193 }
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 const char *conninfo; // string for PQconnectdb function
jbe@23 200 mondelefant_conn_t *conn; // C-structure for userdata
jbe@402 201 // check if string is given as first argument:
jbe@402 202 if (lua_type(L, 1) != LUA_TSTRING) {
jbe@402 203 // expect a table as first argument if no string is given:
jbe@402 204 luaL_checktype(L, 1, LUA_TTABLE);
jbe@406 205 // extract conninfo string for PQconnectdb if possible:
jbe@406 206 lua_getfield(L, 1, "conninfo");
jbe@406 207 if (!lua_isnil(L, -1)) {
jbe@402 208 // if yes, use that value but check its type:
jbe@406 209 luaL_argcheck(L, lua_type(L, -1) == LUA_TSTRING, 1, "\"conninfo\" value is not a string");
jbe@402 210 } else {
jbe@402 211 // otherwise assemble conninfo string from the named options:
jbe@402 212 luaL_Buffer buf;
jbe@40 213 int need_seperator = 0;
jbe@402 214 const char *value;
jbe@402 215 size_t value_len;
jbe@402 216 size_t value_pos = 0;
jbe@402 217 lua_settop(L, 1);
jbe@402 218 lua_pushnil(L); // slot for key at stack position 2
jbe@402 219 lua_pushnil(L); // slot for value at stack position 3
jbe@402 220 luaL_buffinit(L, &buf);
jbe@40 221 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
jbe@402 222 luaL_argcheck(L, lua_isstring(L, -2), 1, "key in table is not a string");
jbe@402 223 luaL_argcheck(L, lua_isstring(L, -1), 1, "value in table is not a string");
jbe@402 224 value = lua_tolstring(L, -1, &value_len);
jbe@40 225 lua_replace(L, 3);
jbe@402 226 lua_pop(L, 1);
jbe@40 227 lua_replace(L, 2);
jbe@402 228 if (need_seperator) luaL_addchar(&buf, ' ');
jbe@40 229 // NOTE: numbers will be converted to strings automatically here,
jbe@40 230 // but perhaps this will change in future versions of lua
jbe@40 231 lua_pushvalue(L, 2);
jbe@402 232 luaL_addvalue(&buf);
jbe@402 233 luaL_addchar(&buf, '=');
jbe@402 234 luaL_addchar(&buf, '\'');
jbe@402 235 do {
jbe@402 236 char c;
jbe@402 237 c = value[value_pos++];
jbe@402 238 if (c == '\'') luaL_addchar(&buf, '\\');
jbe@402 239 luaL_addchar(&buf, c);
jbe@402 240 } while (value_pos < value_len);
jbe@402 241 luaL_addchar(&buf, '\'');
jbe@402 242 need_seperator = 1;
jbe/bsw@0 243 }
jbe@402 244 luaL_pushresult(&buf);
jbe/bsw@0 245 }
jbe@402 246 // ensure that string is on stack position 1 which is the top of stack:
jbe@402 247 lua_replace(L, 1);
jbe/bsw@0 248 }
jbe@402 249 // use conninfo string on stack position 1:
jbe@402 250 conninfo = lua_tostring(L, 1);
jbe@406 251 // create userdata on stack position 2:
jbe@406 252 lua_settop(L, 1);
jbe@406 253 conn = lua_newuserdata(L, sizeof(*conn)); // 2
jbe@23 254 // call PQconnectdb function of libpq:
jbe@406 255 conn->pgconn = PQconnectdb(conninfo);
jbe@406 256 // try emergency garbage collection on first failure:
jbe@406 257 if (!conn->pgconn) {
jbe@406 258 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@406 259 conn->pgconn = PQconnectdb(conninfo);
jbe@407 260 // throw error in case of (unexpected) error of PQconnectdb call:
jbe@407 261 if (!conn->pgconn) return luaL_error(L,
jbe@407 262 "Error in libpq while creating 'PGconn' structure."
jbe@407 263 );
jbe/bsw@0 264 }
jbe@406 265 // set metatable for userdata (ensure PQfinish on unexpected error below):
jbe@406 266 luaL_setmetatable(L, MONDELEFANT_CONN_MT_REGKEY);
jbe@406 267 // check result of PQconnectdb call:
jbe@406 268 if (PQstatus(conn->pgconn) != CONNECTION_OK) {
jbe@406 269 lua_pushnil(L); // 3
jbe@406 270 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 4
jbe@406 271 lua_newtable(L); // 5
jbe@406 272 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 273 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@406 274 lua_setfield(L, 5, "code");
jbe@406 275 lua_pushvalue(L, 4);
jbe@406 276 lua_setfield(L, 5, "message");
jbe@406 277 // manual PQfinish (do not wait until garbage collection):
jbe@406 278 PQfinish(conn->pgconn);
jbe@406 279 conn->pgconn = NULL;
jbe/bsw@0 280 return 3;
jbe/bsw@0 281 }
jbe@23 282 // set 'server_encoding' in C-struct of userdata:
jbe/bsw@0 283 {
jbe/bsw@0 284 const char *charset;
jbe@406 285 charset = PQparameterStatus(conn->pgconn, "server_encoding");
jbe/bsw@0 286 if (charset && !strcmp(charset, "UTF8")) {
jbe/bsw@0 287 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
jbe/bsw@0 288 } else {
jbe/bsw@0 289 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
jbe/bsw@0 290 }
jbe/bsw@0 291 }
jbe@396 292 // create and associate userdata table:
jbe@396 293 lua_newtable(L);
jbe@406 294 lua_setuservalue(L, 2);
jbe@396 295 // store key "fd" with file descriptor of connection:
jbe@406 296 lua_pushinteger(L, PQsocket(conn->pgconn));
jbe@406 297 lua_setfield(L, 2, "fd");
jbe@23 298 // store key "engine" with value "postgresql" as connection specific data:
jbe/bsw@0 299 lua_pushliteral(L, "postgresql");
jbe@406 300 lua_setfield(L, 2, "engine");
jbe@23 301 // return userdata:
jbe/bsw@0 302 return 1;
jbe/bsw@0 303 }
jbe/bsw@0 304
jbe@23 305 // returns pointer to libpq handle 'pgconn' of userdata at given index
jbe@23 306 // (or throws error, if database connection has been closed):
jbe/bsw@0 307 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
jbe/bsw@0 308 mondelefant_conn_t *conn;
jbe/bsw@0 309 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 310 if (!conn->pgconn) {
jbe/bsw@0 311 luaL_error(L, "PostgreSQL connection has been closed.");
jbe/bsw@0 312 return NULL;
jbe/bsw@0 313 }
jbe/bsw@0 314 return conn;
jbe/bsw@0 315 }
jbe/bsw@0 316
jbe@23 317 // meta-method "__index" of database handles (userdata):
jbe/bsw@0 318 static int mondelefant_conn_index(lua_State *L) {
jbe@23 319 // try table for connection specific data:
jbe/bsw@0 320 lua_settop(L, 2);
jbe@396 321 lua_getuservalue(L, 1); // 3
jbe/bsw@0 322 lua_pushvalue(L, 2); // 4
jbe/bsw@0 323 lua_gettable(L, 3); // 4
jbe/bsw@0 324 if (!lua_isnil(L, 4)) return 1;
jbe@23 325 // try to use prototype stored in connection specific data:
jbe/bsw@0 326 lua_settop(L, 3);
jbe/bsw@0 327 lua_getfield(L, 3, "prototype"); // 4
jbe/bsw@0 328 if (lua_toboolean(L, 4)) {
jbe/bsw@0 329 lua_pushvalue(L, 2); // 5
jbe/bsw@0 330 lua_gettable(L, 4); // 5
jbe/bsw@0 331 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 332 }
jbe@23 333 // try to use "postgresql_connection_prototype" of library:
jbe/bsw@0 334 lua_settop(L, 2);
jbe/bsw@0 335 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
jbe/bsw@0 336 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
jbe/bsw@0 337 if (lua_toboolean(L, 4)) {
jbe/bsw@0 338 lua_pushvalue(L, 2); // 5
jbe/bsw@0 339 lua_gettable(L, 4); // 5
jbe/bsw@0 340 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 341 }
jbe@23 342 // try to use "connection_prototype" of library:
jbe/bsw@0 343 lua_settop(L, 3);
jbe/bsw@0 344 lua_getfield(L, 3, "connection_prototype"); // 4
jbe/bsw@0 345 if (lua_toboolean(L, 4)) {
jbe/bsw@0 346 lua_pushvalue(L, 2); // 5
jbe/bsw@0 347 lua_gettable(L, 4); // 5
jbe/bsw@0 348 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 349 }
jbe@23 350 // give up and return nothing:
jbe/bsw@0 351 return 0;
jbe/bsw@0 352 }
jbe/bsw@0 353
jbe@23 354 // meta-method "__newindex" of database handles (userdata):
jbe/bsw@0 355 static int mondelefant_conn_newindex(lua_State *L) {
jbe@23 356 // store key-value pair in table for connection specific data:
jbe/bsw@0 357 lua_settop(L, 3);
jbe@396 358 lua_getuservalue(L, 1); // 4
jbe/bsw@0 359 lua_pushvalue(L, 2);
jbe/bsw@0 360 lua_pushvalue(L, 3);
jbe/bsw@0 361 lua_settable(L, 4);
jbe@23 362 // return nothing:
jbe/bsw@0 363 return 0;
jbe/bsw@0 364 }
jbe/bsw@0 365
jbe@23 366 // meta-method "__gc" of database handles:
jbe/bsw@0 367 static int mondelefant_conn_free(lua_State *L) {
jbe/bsw@0 368 mondelefant_conn_t *conn;
jbe/bsw@0 369 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@410 370 if (conn->todo_PQfreemem) {
jbe@410 371 PQfreemem(conn->todo_PQfreemem);
jbe@410 372 conn->todo_PQfreemem = NULL;
jbe@410 373 }
jbe@410 374 if (conn->todo_PQclear) {
jbe@410 375 PQclear(conn->todo_PQclear);
jbe@410 376 conn->todo_PQclear = NULL;
jbe@410 377 }
jbe@410 378 if (conn->pgconn) {
jbe@410 379 PQfinish(conn->pgconn);
jbe@410 380 conn->pgconn = NULL;
jbe@410 381 }
jbe/bsw@0 382 return 0;
jbe/bsw@0 383 }
jbe/bsw@0 384
jbe@23 385 // method "close" of database handles:
jbe/bsw@0 386 static int mondelefant_conn_close(lua_State *L) {
jbe/bsw@0 387 mondelefant_conn_t *conn;
jbe/bsw@0 388 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 389 PQfinish(conn->pgconn);
jbe/bsw@0 390 conn->pgconn = NULL;
jbe@397 391 lua_pushnil(L);
jbe@396 392 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
jbe/bsw@0 393 return 0;
jbe/bsw@0 394 }
jbe/bsw@0 395
jbe@23 396 // method "is_okay" of database handles:
jbe/bsw@0 397 static int mondelefant_conn_is_ok(lua_State *L) {
jbe/bsw@0 398 mondelefant_conn_t *conn;
jbe/bsw@0 399 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 400 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
jbe/bsw@0 401 return 1;
jbe/bsw@0 402 }
jbe/bsw@0 403
jbe@23 404 // method "get_transaction_status" of database handles:
jbe/bsw@0 405 static int mondelefant_conn_get_transaction_status(lua_State *L) {
jbe/bsw@0 406 mondelefant_conn_t *conn;
jbe/bsw@0 407 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 408 switch (PQtransactionStatus(conn->pgconn)) {
jbe/bsw@0 409 case PQTRANS_IDLE:
jbe/bsw@0 410 lua_pushliteral(L, "idle");
jbe/bsw@0 411 break;
jbe/bsw@0 412 case PQTRANS_ACTIVE:
jbe/bsw@0 413 lua_pushliteral(L, "active");
jbe/bsw@0 414 break;
jbe/bsw@0 415 case PQTRANS_INTRANS:
jbe/bsw@0 416 lua_pushliteral(L, "intrans");
jbe/bsw@0 417 break;
jbe/bsw@0 418 case PQTRANS_INERROR:
jbe/bsw@0 419 lua_pushliteral(L, "inerror");
jbe/bsw@0 420 break;
jbe/bsw@0 421 default:
jbe/bsw@0 422 lua_pushliteral(L, "unknown");
jbe/bsw@0 423 }
jbe/bsw@0 424 return 1;
jbe/bsw@0 425 }
jbe/bsw@0 426
jbe@397 427 // method "try_wait" of database handles:
jbe@397 428 static int mondelefant_conn_try_wait(lua_State *L) {
jbe@393 429 mondelefant_conn_t *conn;
jbe@393 430 int infinite, nonblock = 0;
jbe@393 431 struct timespec wakeup;
jbe@393 432 int fd;
jbe@393 433 fd_set fds;
jbe@393 434 conn = mondelefant_get_conn(L, 1);
jbe@393 435 infinite = lua_isnoneornil(L, 2);
jbe@393 436 if (!infinite) {
jbe@393 437 lua_Number n;
jbe@393 438 int isnum;
jbe@393 439 n = lua_tonumberx(L, 2, &isnum);
jbe@393 440 if (isnum && n>0 && n<=86400*366) {
jbe@393 441 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
jbe@393 442 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 443 }
jbe@393 444 wakeup.tv_sec += n;
jbe@393 445 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
jbe@393 446 if (wakeup.tv_nsec >= 1000000000) {
jbe@393 447 wakeup.tv_sec += 1;
jbe@393 448 wakeup.tv_nsec -= 1000000000;
jbe@393 449 }
jbe@393 450 } else if (isnum && n==0) {
jbe@393 451 nonblock = 1;
jbe@393 452 } else {
jbe@393 453 luaL_argcheck(L, 0, 2, "not a valid timeout");
jbe@393 454 }
jbe@393 455 }
jbe@397 456 lua_settop(L, 1);
jbe@393 457 if (!nonblock) {
jbe@393 458 fd = PQsocket(conn->pgconn);
jbe@393 459 FD_ZERO(&fds);
jbe@393 460 FD_SET(fd, &fds);
jbe@393 461 }
jbe@393 462 while (true) {
jbe@393 463 {
jbe@393 464 PGnotify *notify;
jbe@393 465 if (!PQconsumeInput(conn->pgconn)) {
jbe@397 466 lua_newtable(L); // 2
jbe@406 467 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe@397 468 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@397 469 lua_setfield(L, 2, "code");
jbe@397 470 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 3
jbe@397 471 lua_setfield(L, 2, "message");
jbe@397 472 return 1;
jbe@393 473 }
jbe@412 474 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 475 if (conn->todo_PQfreemem) {
jbe@412 476 PQfreemem(conn->todo_PQfreemem);
jbe@412 477 conn->todo_PQfreemem = NULL;
jbe@412 478 }
jbe@393 479 notify = PQnotifies(conn->pgconn);
jbe@393 480 if (notify) {
jbe@412 481 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@412 482 conn->todo_PQfreemem = notify;
jbe@412 483 // do Lua operations:
jbe@397 484 lua_pushnil(L);
jbe@393 485 lua_pushstring(L, notify->relname);
jbe@393 486 lua_pushstring(L, notify->extra);
jbe@393 487 lua_pushinteger(L, notify->be_pid);
jbe@412 488 // free memory allocated by PQnotifies:
jbe@393 489 PQfreemem(notify);
jbe@412 490 // avoid double call of PQfreemem later:
jbe@412 491 conn->todo_PQfreemem = NULL;
jbe@397 492 return 4;
jbe@393 493 }
jbe@393 494 }
jbe@393 495 if (infinite) {
jbe@393 496 select(fd+1, &fds, NULL, NULL, NULL);
jbe@393 497 } else if (nonblock) {
jbe@393 498 break;
jbe@393 499 } else {
jbe@393 500 struct timespec tp;
jbe@393 501 struct timeval timeout = { 0, };
jbe@393 502 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@393 503 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 504 }
jbe@393 505 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
jbe@393 506 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
jbe@393 507 if (tp.tv_nsec < 0) {
jbe@393 508 tp.tv_sec -= 1;
jbe@393 509 tp.tv_nsec += 1000000000;
jbe@393 510 }
jbe@393 511 timeout.tv_sec = tp.tv_sec;
jbe@393 512 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
jbe@393 513 if (
jbe@393 514 timeout.tv_sec < 0 ||
jbe@393 515 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
jbe@393 516 ) break;
jbe@393 517 select(fd+1, &fds, NULL, NULL, &timeout);
jbe@393 518 }
jbe@393 519 }
jbe@397 520 lua_pushnil(L);
jbe@397 521 lua_pushnil(L);
jbe@393 522 return 2;
jbe@393 523 }
jbe@393 524
jbe@23 525 // method "create_list" of database handles:
jbe/bsw@0 526 static int mondelefant_conn_create_list(lua_State *L) {
jbe@23 527 // ensure that first argument is a database connection:
jbe/bsw@0 528 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 529 // if no second argument is given, use an empty table:
jbe@397 530 if (lua_isnoneornil(L, 2)) {
jbe@397 531 lua_settop(L, 1);
jbe@397 532 lua_newtable(L); // 2
jbe@397 533 } else {
jbe@397 534 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 535 lua_settop(L, 2);
jbe/bsw@0 536 }
jbe@23 537 // set meta-table for database result lists/objects:
jbe@406 538 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 539 // set "_connection" attribute to self:
jbe/bsw@0 540 lua_pushvalue(L, 1); // 3
jbe/bsw@0 541 lua_setfield(L, 2, "_connection");
jbe@23 542 // set "_type" attribute to string "list":
jbe/bsw@0 543 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 544 lua_setfield(L, 2, "_type");
jbe@23 545 // return created database result list:
jbe/bsw@0 546 return 1;
jbe/bsw@0 547 }
jbe/bsw@0 548
jbe@23 549 // method "create_object" of database handles:
jbe/bsw@0 550 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 551 // ensure that first argument is a database connection:
jbe/bsw@0 552 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 553 // if no second argument is given, use an empty table:
jbe@397 554 if (lua_isnoneornil(L, 2)) {
jbe@397 555 lua_settop(L, 1);
jbe@397 556 lua_newtable(L); // 2
jbe@397 557 } else {
jbe@397 558 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 559 lua_settop(L, 2);
jbe/bsw@0 560 }
jbe@397 561 // set meta-table for database result lists/objects:
jbe@406 562 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 563 // set "_connection" attribute to self:
jbe/bsw@0 564 lua_pushvalue(L, 1); // 3
jbe/bsw@0 565 lua_setfield(L, 2, "_connection");
jbe@23 566 // set "_type" attribute to string "object":
jbe/bsw@0 567 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 568 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@23 569 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 570 lua_newtable(L); // 3
jbe/bsw@0 571 lua_setfield(L, 2, "_data");
jbe/bsw@0 572 lua_newtable(L); // 3
jbe/bsw@0 573 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 574 lua_newtable(L); // 3
jbe/bsw@0 575 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@23 576 // return created database result object:
jbe/bsw@0 577 return 1;
jbe/bsw@0 578 }
jbe/bsw@0 579
jbe@23 580 // method "quote_string" of database handles:
jbe/bsw@0 581 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 582 mondelefant_conn_t *conn;
jbe/bsw@0 583 const char *input;
jbe/bsw@0 584 size_t input_len;
jbe@407 585 luaL_Buffer buf;
jbe/bsw@0 586 char *output;
jbe/bsw@0 587 size_t output_len;
jbe@407 588 // get database connection object:
jbe/bsw@0 589 conn = mondelefant_get_conn(L, 1);
jbe@23 590 // get second argument, which must be a string:
jbe/bsw@0 591 input = luaL_checklstring(L, 2, &input_len);
jbe@23 592 // throw error, if string is too long:
jbe/bsw@0 593 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 594 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 595 }
jbe@23 596 // allocate memory for quoted string:
jbe@407 597 output = luaL_buffinitsize(L, &buf, (2 * input_len + 3) * sizeof(char));
jbe@23 598 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 599 // single quotes:
jbe/bsw@0 600 output[0] = '\'';
jbe/bsw@0 601 output_len = PQescapeStringConn(
jbe/bsw@0 602 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 603 );
jbe/bsw@0 604 output[output_len + 1] = '\'';
jbe/bsw@0 605 output[output_len + 2] = 0;
jbe@23 606 // create Lua string:
jbe@407 607 luaL_addsize(&buf, output_len + 2);
jbe@23 608 // return Lua string:
jbe/bsw@0 609 return 1;
jbe/bsw@0 610 }
jbe/bsw@0 611
jbe@23 612 // method "quote_binary" of database handles:
jbe/bsw@0 613 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 614 mondelefant_conn_t *conn;
jbe/bsw@0 615 const char *input;
jbe/bsw@0 616 size_t input_len;
jbe/bsw@0 617 char *output;
jbe/bsw@0 618 size_t output_len;
jbe/bsw@0 619 luaL_Buffer buf;
jbe@407 620 // get database connection object:
jbe/bsw@0 621 conn = mondelefant_get_conn(L, 1);
jbe@23 622 // get second argument, which must be a string:
jbe/bsw@0 623 input = luaL_checklstring(L, 2, &input_len);
jbe@408 624 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 625 if (conn->todo_PQfreemem) {
jbe@410 626 PQfreemem(conn->todo_PQfreemem);
jbe@410 627 conn->todo_PQfreemem = NULL;
jbe@410 628 }
jbe@23 629 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 630 output = (char *)PQescapeByteaConn(
jbe/bsw@0 631 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 632 );
jbe/bsw@0 633 if (!output) {
jbe@408 634 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@408 635 output = (char *)PQescapeByteaConn(
jbe@408 636 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe@408 637 );
jbe@408 638 if (!output) {
jbe@408 639 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe@408 640 }
jbe/bsw@0 641 }
jbe@412 642 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@408 643 conn->todo_PQfreemem = output;
jbe@23 644 // create Lua string enclosed by single quotes:
jbe/bsw@0 645 luaL_buffinit(L, &buf);
jbe/bsw@0 646 luaL_addchar(&buf, '\'');
jbe/bsw@0 647 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 648 luaL_addchar(&buf, '\'');
jbe/bsw@0 649 luaL_pushresult(&buf);
jbe@23 650 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 651 PQfreemem(output);
jbe@408 652 // avoid double call of PQfreemem later:
jbe@408 653 conn->todo_PQfreemem = NULL;
jbe@23 654 // return Lua string:
jbe/bsw@0 655 return 1;
jbe/bsw@0 656 }
jbe/bsw@0 657
jbe@23 658 // method "assemble_command" of database handles:
jbe/bsw@0 659 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 660 mondelefant_conn_t *conn;
jbe/bsw@0 661 int paramidx = 2;
jbe/bsw@0 662 const char *template;
jbe/bsw@0 663 size_t template_pos = 0;
jbe/bsw@0 664 luaL_Buffer buf;
jbe@407 665 // get database connection object:
jbe/bsw@0 666 conn = mondelefant_get_conn(L, 1);
jbe@23 667 // if second argument is a string, return this string:
jbe@397 668 if (lua_type(L, 2) == LUA_TSTRING) {
jbe@397 669 lua_settop(L, 2);
jbe/bsw@0 670 return 1;
jbe/bsw@0 671 }
jbe@23 672 // if second argument has __tostring meta-method,
jbe@23 673 // then use this method and return its result:
jbe/bsw@0 674 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 675 // otherwise, require that second argument is a table:
jbe/bsw@0 676 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 677 // set stack top:
jbe@397 678 lua_settop(L, 2);
jbe@23 679 // get first element of table, which must be a string:
jbe/bsw@0 680 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 681 luaL_argcheck(L,
jbe/bsw@0 682 lua_isstring(L, 3),
jbe/bsw@0 683 2,
jbe/bsw@0 684 "First entry of SQL command structure is not a string."
jbe/bsw@0 685 );
jbe/bsw@0 686 template = lua_tostring(L, 3);
jbe@23 687 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 688 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 689 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 690 // reserve space on Lua stack:
jbe/bsw@0 691 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 692 lua_pushnil(L); // free space at stack position 6
jbe@23 693 // initialize Lua buffer for result string:
jbe/bsw@0 694 luaL_buffinit(L, &buf);
jbe@23 695 // fill buffer in loop:
jbe/bsw@0 696 while (1) {
jbe@23 697 // variable declaration:
jbe/bsw@0 698 char c;
jbe@23 699 // get next character:
jbe/bsw@0 700 c = template[template_pos++];
jbe@23 701 // break, when character is NULL byte:
jbe/bsw@0 702 if (!c) break;
jbe@23 703 // question-mark and dollar-sign are special characters:
jbe@23 704 if (c == '?' || c == '$') { // special character found
jbe@23 705 // check, if same character follows:
jbe@23 706 if (template[template_pos] == c) { // special character is escaped
jbe@23 707 // consume two characters of input and add one character to buffer:
jbe/bsw@0 708 template_pos++;
jbe/bsw@0 709 luaL_addchar(&buf, c);
jbe@23 710 } else { // special character is not escaped
jbe/bsw@0 711 luaL_Buffer keybuf;
jbe/bsw@0 712 int subcmd;
jbe@23 713 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 714 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 715 subcmd = (c == '$');
jbe@23 716 // read any number of alpha numeric chars or underscores
jbe@23 717 // and store them on Lua stack:
jbe/bsw@0 718 luaL_buffinit(L, &keybuf);
jbe/bsw@0 719 while (1) {
jbe/bsw@0 720 c = template[template_pos];
jbe/bsw@0 721 if (
jbe/bsw@0 722 (c < 'A' || c > 'Z') &&
jbe/bsw@0 723 (c < 'a' || c > 'z') &&
jbe/bsw@0 724 (c < '0' || c > '9') &&
jbe/bsw@0 725 (c != '_')
jbe/bsw@0 726 ) break;
jbe/bsw@0 727 luaL_addchar(&keybuf, c);
jbe/bsw@0 728 template_pos++;
jbe/bsw@0 729 }
jbe/bsw@0 730 luaL_pushresult(&keybuf);
jbe@23 731 // check, if any characters matched:
jbe@64 732 if (lua_rawlen(L, -1)) {
jbe@23 733 // if any alpha numeric chars or underscores were found,
jbe@23 734 // push them on stack as a Lua string and use them to lookup
jbe@23 735 // value from second argument:
jbe/bsw@0 736 lua_pushvalue(L, -1); // save key on stack
jbe@23 737 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 738 } else {
jbe@23 739 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 740 lua_pop(L, 1);
jbe/bsw@0 741 lua_pushnil(L); // put nil on key position
jbe@23 742 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 743 }
jbe@23 744 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 745 // branch according to type of special character ("?" or "$"):
jbe@23 746 if (subcmd) { // dollar-sign
jbe/bsw@0 747 size_t i;
jbe/bsw@0 748 size_t count;
jbe@23 749 // store fetched value (which is supposed to be sub-structure)
jbe@23 750 // on Lua stack position 5 and drop key:
jbe@23 751 lua_replace(L, 5);
jbe@23 752 lua_pop(L, 1);
jbe@23 753 // Lua stack contains: ..., <buffer>
jbe@23 754 // check, if fetched value is really a sub-structure:
jbe/bsw@0 755 luaL_argcheck(L,
jbe/bsw@0 756 !lua_isnil(L, 5),
jbe/bsw@0 757 2,
jbe/bsw@0 758 "SQL sub-structure not found."
jbe/bsw@0 759 );
jbe/bsw@0 760 luaL_argcheck(L,
jbe/bsw@0 761 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 762 2,
jbe/bsw@0 763 "SQL sub-structure must be a table."
jbe/bsw@0 764 );
jbe@23 765 // Lua stack contains: ..., <buffer>
jbe@23 766 // get value of "sep" attribute of sub-structure,
jbe@23 767 // and place it on Lua stack position 6:
jbe/bsw@0 768 lua_getfield(L, 5, "sep");
jbe@23 769 lua_replace(L, 6);
jbe@23 770 // if seperator is nil, then use ", " as default,
jbe@23 771 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 772 if (lua_isnil(L, 6)) {
jbe/bsw@0 773 lua_pushstring(L, ", ");
jbe/bsw@0 774 lua_replace(L, 6);
jbe/bsw@0 775 } else {
jbe/bsw@0 776 luaL_argcheck(L,
jbe/bsw@0 777 lua_isstring(L, 6),
jbe/bsw@0 778 2,
jbe/bsw@0 779 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 780 );
jbe/bsw@0 781 }
jbe@23 782 // iterate over items of sub-structure:
jbe@64 783 count = lua_rawlen(L, 5);
jbe/bsw@0 784 for (i = 0; i < count; i++) {
jbe@23 785 // add seperator, unless this is the first run:
jbe/bsw@0 786 if (i) {
jbe/bsw@0 787 lua_pushvalue(L, 6);
jbe/bsw@0 788 luaL_addvalue(&buf);
jbe/bsw@0 789 }
jbe@23 790 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 791 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 792 lua_pushvalue(L, 1);
jbe/bsw@0 793 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 794 lua_call(L, 2, 1);
jbe/bsw@0 795 luaL_addvalue(&buf);
jbe/bsw@0 796 }
jbe@23 797 } else { // question-mark
jbe/bsw@0 798 if (lua_toboolean(L, 4)) {
jbe@23 799 // call input_converter with connection handle, raw-value and
jbe@23 800 // an info-table which contains a "field_name" entry with the
jbe@23 801 // used key:
jbe/bsw@0 802 lua_pushvalue(L, 4);
jbe/bsw@0 803 lua_pushvalue(L, 1);
jbe/bsw@0 804 lua_pushvalue(L, -3);
jbe/bsw@0 805 lua_newtable(L);
jbe/bsw@0 806 lua_pushvalue(L, -6);
jbe/bsw@0 807 lua_setfield(L, -2, "field_name");
jbe/bsw@0 808 lua_call(L, 3, 1);
jbe@23 809 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 810 // remove key and raw-value:
jbe/bsw@0 811 lua_remove(L, -2);
jbe/bsw@0 812 lua_remove(L, -2);
jbe@23 813 // Lua stack contains: ..., <buffer>, final-value
jbe@23 814 // throw error, if final-value is not a string:
jbe/bsw@0 815 if (!lua_isstring(L, -1)) {
jbe/bsw@0 816 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 817 }
jbe/bsw@0 818 } else {
jbe@23 819 // remove key from stack:
jbe/bsw@0 820 lua_remove(L, -2);
jbe@23 821 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 822 // branch according to type of value:
jbe@408 823 // NOTE: Lua automatically converts numbers to strings
jbe@23 824 if (lua_isnil(L, -1)) { // value is nil
jbe@23 825 // push string "NULL" to stack:
jbe/bsw@0 826 lua_pushliteral(L, "NULL");
jbe@23 827 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 828 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 829 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 830 } else if (lua_isstring(L, -1)) { // value is string or number
jbe@408 831 // push output of "quote_string" method of database connection
jbe@408 832 // to stack:
jbe/bsw@0 833 lua_tostring(L, -1);
jbe/bsw@0 834 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 835 lua_pushvalue(L, 1);
jbe/bsw@0 836 lua_pushvalue(L, -3);
jbe/bsw@0 837 lua_call(L, 2, 1);
jbe@23 838 } else { // value is of other type
jbe@23 839 // throw error:
jbe/bsw@0 840 return luaL_error(L,
jbe/bsw@0 841 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 842 "or missing input_converter."
jbe/bsw@0 843 );
jbe/bsw@0 844 }
jbe@23 845 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 846 // remove raw-value:
jbe/bsw@0 847 lua_remove(L, -2);
jbe@23 848 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 849 }
jbe@23 850 // append final-value to buffer:
jbe/bsw@0 851 luaL_addvalue(&buf);
jbe/bsw@0 852 }
jbe/bsw@0 853 }
jbe@23 854 } else { // character is not special
jbe@23 855 // just copy character:
jbe/bsw@0 856 luaL_addchar(&buf, c);
jbe/bsw@0 857 }
jbe/bsw@0 858 }
jbe@23 859 // return string in buffer:
jbe/bsw@0 860 luaL_pushresult(&buf);
jbe/bsw@0 861 return 1;
jbe/bsw@0 862 }
jbe/bsw@0 863
jbe@23 864 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 865 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 866 // max number of columns in a database result:
jbe/bsw@0 867 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 868 // enum values for 'modes' array in C-function below:
jbe/bsw@0 869 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 870 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 871 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 872
jbe@23 873 // method "try_query" of database handles:
jbe/bsw@0 874 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 875 mondelefant_conn_t *conn;
jbe/bsw@0 876 int command_count;
jbe/bsw@0 877 int command_idx;
jbe/bsw@0 878 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 879 luaL_Buffer buf;
jbe/bsw@0 880 int sent_success;
jbe/bsw@0 881 PGresult *res;
jbe/bsw@0 882 int rows, cols, row, col;
jbe@407 883 // get database connection object:
jbe/bsw@0 884 conn = mondelefant_get_conn(L, 1);
jbe@23 885 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 886 command_count = lua_gettop(L) / 2;
jbe@23 887 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 888 lua_pushnil(L);
jbe@23 889 // throw error, if number of commands is too high:
jbe/bsw@0 890 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 891 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 892 }
jbe@23 893 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 894 luaL_buffinit(L, &buf);
jbe/bsw@0 895 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 896 int mode;
jbe/bsw@0 897 int mode_idx; // stack index of mode string
jbe/bsw@0 898 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 899 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 900 lua_pushvalue(L, 1);
jbe/bsw@0 901 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 902 lua_call(L, 2, 1);
jbe/bsw@0 903 luaL_addvalue(&buf);
jbe/bsw@0 904 luaL_addchar(&buf, ';');
jbe/bsw@0 905 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 906 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 907 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 908 } else {
jbe/bsw@0 909 const char *modestr;
jbe/bsw@0 910 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 911 if (!strcmp(modestr, "list")) {
jbe/bsw@0 912 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 913 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 914 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 915 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 916 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 917 } else {
jbe@397 918 return luaL_argerror(L, mode_idx, "unknown query mode");
jbe/bsw@0 919 }
jbe/bsw@0 920 }
jbe/bsw@0 921 modes[command_idx] = mode;
jbe/bsw@0 922 }
jbe/bsw@0 923 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 924 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 925 // call sql_tracer, if set:
jbe/bsw@0 926 lua_settop(L, 2);
jbe/bsw@0 927 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 928 if (lua_toboolean(L, 3)) {
jbe/bsw@0 929 lua_pushvalue(L, 1); // 4
jbe/bsw@0 930 lua_pushvalue(L, 2); // 5
jbe/bsw@0 931 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 932 }
jbe@23 933 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 934 // position 3.
jbe@23 935 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 936 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 937 // create preliminary result table:
jbe/bsw@0 938 lua_newtable(L); // results in table at stack position 4
jbe@23 939 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 940 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 941 int mode;
jbe/bsw@0 942 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 943 ExecStatusType pgstatus;
jbe@23 944 // fetch mode which was given for the command:
jbe/bsw@0 945 mode = modes[command_idx];
jbe@23 946 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 947 if (sent_success) {
jbe@408 948 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 949 if (conn->todo_PQclear) {
jbe@410 950 PQclear(conn->todo_PQclear);
jbe@410 951 conn->todo_PQclear = NULL;
jbe@410 952 }
jbe@23 953 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 954 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 955 res = PQgetResult(conn->pgconn);
jbe/bsw@0 956 if (command_idx >= command_count && !res) break;
jbe/bsw@0 957 if (res) {
jbe/bsw@0 958 pgstatus = PQresultStatus(res);
jbe/bsw@0 959 rows = PQntuples(res);
jbe/bsw@0 960 cols = PQnfields(res);
jbe@412 961 // ensure call of PQclear in case of Lua errors:
jbe@408 962 conn->todo_PQclear = res;
jbe/bsw@0 963 }
jbe/bsw@0 964 }
jbe@23 965 // handle errors:
jbe/bsw@0 966 if (
jbe/bsw@0 967 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 968 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 969 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 970 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 971 ) {
jbe/bsw@0 972 const char *command;
jbe/bsw@0 973 command = lua_tostring(L, 2);
jbe/bsw@0 974 lua_newtable(L); // 5
jbe@406 975 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 976 lua_pushvalue(L, 1);
jbe/bsw@0 977 lua_setfield(L, 5, "connection");
jbe/bsw@0 978 lua_pushvalue(L, 2);
jbe/bsw@0 979 lua_setfield(L, 5, "sql_command");
jbe@397 980 if (!sent_success) {
jbe@397 981 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 982 lua_setfield(L, 5, "code");
jbe@397 983 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe/bsw@0 984 lua_setfield(L, 5, "message");
jbe/bsw@0 985 } else {
jbe@397 986 lua_pushinteger(L, command_idx + 1);
jbe@397 987 lua_setfield(L, 5, "command_number");
jbe@397 988 if (!res) {
jbe@397 989 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe@397 990 lua_setfield(L, 5, "code");
jbe@397 991 lua_pushliteral(L, "Received too few database result sets.");
jbe@397 992 lua_setfield(L, 5, "message");
jbe@397 993 } else if (command_idx >= command_count) {
jbe@397 994 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe@397 995 lua_setfield(L, 5, "code");
jbe@397 996 lua_pushliteral(L, "Received too many database result sets.");
jbe@397 997 lua_setfield(L, 5, "message");
jbe@397 998 } else if (
jbe@397 999 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe@397 1000 ) {
jbe@397 1001 const char *sqlstate;
jbe@397 1002 const char *errmsg;
jbe@397 1003 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe@397 1004 lua_setfield(L, 5, "pg_severity");
jbe@397 1005 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe@397 1006 if (sqlstate) {
jbe@397 1007 lua_pushstring(L, sqlstate);
jbe@397 1008 lua_setfield(L, 5, "pg_sqlstate");
jbe@397 1009 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe@397 1010 lua_setfield(L, 5, "code");
jbe@397 1011 } else {
jbe@397 1012 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe@397 1013 lua_setfield(L, 5, "code");
jbe@397 1014 }
jbe@397 1015 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe@397 1016 if (errmsg) {
jbe@397 1017 mondelefant_push_first_line(L, errmsg);
jbe@397 1018 lua_setfield(L, 5, "message");
jbe@397 1019 lua_pushstring(L, errmsg);
jbe@397 1020 lua_setfield(L, 5, "pg_message_primary");
jbe@397 1021 } else {
jbe@397 1022 lua_pushliteral(L,
jbe@397 1023 "Error while fetching result, but no error message given."
jbe@397 1024 );
jbe@397 1025 lua_setfield(L, 5, "message");
jbe@397 1026 }
jbe@397 1027 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe@397 1028 lua_setfield(L, 5, "pg_message_detail");
jbe@397 1029 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe@397 1030 lua_setfield(L, 5, "pg_message_hint");
jbe@397 1031 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe@397 1032 // byte offsets, as Lua 5.2 is not Unicode aware.
jbe@397 1033 {
jbe@397 1034 char *tmp;
jbe@397 1035 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe@397 1036 if (tmp) {
jbe@397 1037 int pos;
jbe@397 1038 pos = atoi(tmp) - 1;
jbe@397 1039 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1040 pos = utf8_position_to_byte(command, pos);
jbe@397 1041 }
jbe@397 1042 lua_pushinteger(L, pos + 1);
jbe@397 1043 lua_setfield(L, 5, "position");
jbe@397 1044 }
jbe@397 1045 }
jbe@397 1046 {
jbe@397 1047 const char *internal_query;
jbe@397 1048 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe@397 1049 lua_pushstring(L, internal_query);
jbe@397 1050 lua_setfield(L, 5, "pg_internal_query");
jbe@397 1051 char *tmp;
jbe@397 1052 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe@397 1053 if (tmp) {
jbe@397 1054 int pos;
jbe@397 1055 pos = atoi(tmp) - 1;
jbe@397 1056 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1057 pos = utf8_position_to_byte(internal_query, pos);
jbe@397 1058 }
jbe@397 1059 lua_pushinteger(L, pos + 1);
jbe@397 1060 lua_setfield(L, 5, "pg_internal_position");
jbe@397 1061 }
jbe@397 1062 }
jbe@397 1063 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe@397 1064 lua_setfield(L, 5, "pg_context");
jbe@397 1065 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe@397 1066 lua_setfield(L, 5, "pg_source_file");
jbe@397 1067 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe@397 1068 lua_setfield(L, 5, "pg_source_line");
jbe@397 1069 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe@397 1070 lua_setfield(L, 5, "pg_source_function");
jbe@397 1071 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe@397 1072 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe@397 1073 lua_setfield(L, 5, "code");
jbe@397 1074 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe@397 1075 lua_setfield(L, 5, "message");
jbe@397 1076 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe@397 1077 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe@397 1078 lua_setfield(L, 5, "code");
jbe@397 1079 lua_pushliteral(L, "Got more than one result row.");
jbe@397 1080 lua_setfield(L, 5, "message");
jbe@397 1081 } else {
jbe@397 1082 // should not happen
jbe@397 1083 abort();
jbe@397 1084 }
jbe@397 1085 if (res) {
jbe@397 1086 PQclear(res);
jbe@397 1087 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe@408 1088 // avoid double call of PQclear later:
jbe@408 1089 conn->todo_PQclear = NULL;
jbe@397 1090 }
jbe/bsw@0 1091 }
jbe/bsw@0 1092 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1093 lua_pushvalue(L, 3);
jbe/bsw@0 1094 lua_pushvalue(L, 5);
jbe/bsw@0 1095 lua_call(L, 1, 0);
jbe/bsw@0 1096 }
jbe/bsw@0 1097 return 1;
jbe/bsw@0 1098 }
jbe@23 1099 // call "create_list" or "create_object" method of database handle,
jbe@23 1100 // result will be at stack position 5:
jbe/bsw@0 1101 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1102 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1103 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1104 lua_call(L, 1, 1); // 5
jbe/bsw@0 1105 } else {
jbe/bsw@0 1106 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1107 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1108 lua_call(L, 1, 1); // 5
jbe/bsw@0 1109 }
jbe@23 1110 // set "_column_info":
jbe@23 1111 lua_newtable(L); // 6
jbe/bsw@0 1112 for (col = 0; col < cols; col++) {
jbe/bsw@0 1113 lua_newtable(L); // 7
jbe@380 1114 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1115 lua_pushvalue(L, 8); // 9
jbe@380 1116 lua_pushvalue(L, 7); // 10
jbe@380 1117 lua_rawset(L, 6);
jbe/bsw@0 1118 lua_setfield(L, 7, "field_name");
jbe@380 1119 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1120 {
jbe/bsw@0 1121 Oid tmp;
jbe/bsw@0 1122 tmp = PQftable(res, col);
jbe/bsw@0 1123 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1124 else lua_pushinteger(L, tmp);
jbe/bsw@0 1125 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1126 }
jbe/bsw@0 1127 {
jbe/bsw@0 1128 int tmp;
jbe/bsw@0 1129 tmp = PQftablecol(res, col);
jbe/bsw@0 1130 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1131 else lua_pushinteger(L, tmp);
jbe/bsw@0 1132 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1133 }
jbe/bsw@0 1134 {
jbe/bsw@0 1135 Oid tmp;
jbe/bsw@0 1136 tmp = PQftype(res, col);
jbe/bsw@0 1137 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1138 lua_pushinteger(L, tmp);
jbe/bsw@0 1139 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1140 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1141 lua_setfield(L, 7, "type");
jbe/bsw@0 1142 }
jbe/bsw@0 1143 {
jbe/bsw@0 1144 int tmp;
jbe/bsw@0 1145 tmp = PQfmod(res, col);
jbe/bsw@0 1146 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1147 else lua_pushinteger(L, tmp);
jbe/bsw@0 1148 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1149 }
jbe/bsw@0 1150 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1151 }
jbe@23 1152 lua_setfield(L, 5, "_column_info");
jbe@23 1153 // set "_rows_affected":
jbe/bsw@0 1154 {
jbe/bsw@0 1155 char *tmp;
jbe/bsw@0 1156 tmp = PQcmdTuples(res);
jbe/bsw@0 1157 if (tmp[0]) {
jbe/bsw@0 1158 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1159 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1160 }
jbe/bsw@0 1161 }
jbe@23 1162 // set "_oid":
jbe/bsw@0 1163 {
jbe/bsw@0 1164 Oid tmp;
jbe/bsw@0 1165 tmp = PQoidValue(res);
jbe/bsw@0 1166 if (tmp != InvalidOid) {
jbe/bsw@0 1167 lua_pushinteger(L, tmp);
jbe/bsw@0 1168 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1169 }
jbe/bsw@0 1170 }
jbe@23 1171 // copy data as strings or nil, while performing binary unescaping
jbe@23 1172 // automatically:
jbe/bsw@0 1173 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1174 for (row = 0; row < rows; row++) {
jbe/bsw@0 1175 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1176 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1177 lua_call(L, 1, 1); // 6
jbe/bsw@0 1178 for (col = 0; col < cols; col++) {
jbe/bsw@0 1179 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1180 lua_pushnil(L);
jbe/bsw@0 1181 } else if (binary[col]) {
jbe/bsw@0 1182 size_t binlen;
jbe/bsw@0 1183 char *binval;
jbe@412 1184 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1185 if (conn->todo_PQfreemem) {
jbe@412 1186 PQfreemem(conn->todo_PQfreemem);
jbe@412 1187 conn->todo_PQfreemem = NULL;
jbe@412 1188 }
jbe@412 1189 // Unescape binary data:
jbe/bsw@0 1190 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1191 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1192 );
jbe/bsw@0 1193 if (!binval) {
jbe/bsw@0 1194 return luaL_error(L,
jbe/bsw@0 1195 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1196 );
jbe/bsw@0 1197 }
jbe@412 1198 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1199 conn->todo_PQfreemem = binval;
jbe@412 1200 // create Lua string:
jbe/bsw@0 1201 lua_pushlstring(L, binval, binlen);
jbe@412 1202 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1203 PQfreemem(binval);
jbe@412 1204 // avoid double call of PQfreemem later:
jbe@412 1205 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1206 } else {
jbe/bsw@0 1207 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1208 }
jbe/bsw@0 1209 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1210 }
jbe/bsw@0 1211 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1212 }
jbe/bsw@0 1213 } else if (rows == 1) {
jbe/bsw@0 1214 for (col = 0; col < cols; col++) {
jbe/bsw@0 1215 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1216 lua_pushnil(L);
jbe/bsw@0 1217 } else if (binary[col]) {
jbe/bsw@0 1218 size_t binlen;
jbe/bsw@0 1219 char *binval;
jbe@412 1220 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1221 if (conn->todo_PQfreemem) {
jbe@412 1222 PQfreemem(conn->todo_PQfreemem);
jbe@412 1223 conn->todo_PQfreemem = NULL;
jbe@412 1224 }
jbe@412 1225 // Unescape binary data:
jbe/bsw@0 1226 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1227 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1228 );
jbe/bsw@0 1229 if (!binval) {
jbe/bsw@0 1230 return luaL_error(L,
jbe/bsw@0 1231 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1232 );
jbe/bsw@0 1233 }
jbe@412 1234 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1235 conn->todo_PQfreemem = binval;
jbe@412 1236 // create Lua string:
jbe/bsw@0 1237 lua_pushlstring(L, binval, binlen);
jbe@412 1238 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1239 PQfreemem(binval);
jbe@412 1240 // avoid double call of PQfreemem later:
jbe@412 1241 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1242 } else {
jbe/bsw@0 1243 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1244 }
jbe/bsw@0 1245 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1246 }
jbe/bsw@0 1247 } else {
jbe/bsw@0 1248 // no row in optrow mode
jbe/bsw@0 1249 lua_pop(L, 1);
jbe/bsw@0 1250 lua_pushnil(L);
jbe/bsw@0 1251 }
jbe@23 1252 // save result in result list:
jbe/bsw@0 1253 lua_rawseti(L, 4, command_idx+1);
jbe@23 1254 // extra assertion:
jbe/bsw@0 1255 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1256 // free memory acquired by libpq:
jbe/bsw@0 1257 PQclear(res);
jbe@408 1258 // avoid double call of PQclear later:
jbe@408 1259 conn->todo_PQclear = NULL;
jbe/bsw@0 1260 }
jbe/bsw@0 1261 // trace callback at stack position 3
jbe/bsw@0 1262 // result at stack position 4 (top of stack)
jbe@23 1263 // if a trace callback is existent, then call:
jbe/bsw@0 1264 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1265 lua_pushvalue(L, 3);
jbe/bsw@0 1266 lua_call(L, 0, 0);
jbe/bsw@0 1267 }
jbe@23 1268 // put result at stack position 3:
jbe@23 1269 lua_replace(L, 3);
jbe@23 1270 // get output converter to stack position 4:
jbe@23 1271 lua_getfield(L, 1, "output_converter");
jbe@374 1272 // get mutability state saver to stack position 5:
jbe@375 1273 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1274 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1275 lua_replace(L, -2);
jbe@23 1276 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1277 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1278 int mode;
jbe/bsw@0 1279 mode = modes[command_idx];
jbe@374 1280 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1281 if (lua_toboolean(L, 6)) {
jbe@374 1282 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@374 1283 cols = lua_rawlen(L, 7);
jbe/bsw@0 1284 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@374 1285 rows = lua_rawlen(L, 6);
jbe/bsw@0 1286 for (row = 0; row < rows; row++) {
jbe@374 1287 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1288 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1289 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1290 for (col = 0; col < cols; col++) {
jbe@375 1291 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1292 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1293 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1294 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1295 lua_pushvalue(L, 1); // connection
jbe@374 1296 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1297 lua_pushvalue(L, 11); // this column info
jbe@375 1298 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1299 } else {
jbe@375 1300 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1301 }
jbe@375 1302 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1303 lua_pushvalue(L, 12); // copy of field name
jbe@375 1304 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1305 lua_pushvalue(L, 13); // copy of value
jbe@375 1306 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1307 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1308 }
jbe@375 1309 lua_pushvalue(L, 13); // 14
jbe@374 1310 lua_rawseti(L, 8, col+1);
jbe@374 1311 lua_rawset(L, 9);
jbe@399 1312 lua_settop(L, 10);
jbe/bsw@0 1313 }
jbe@374 1314 lua_settop(L, 7);
jbe/bsw@0 1315 }
jbe/bsw@0 1316 } else {
jbe@374 1317 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1318 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1319 for (col = 0; col < cols; col++) {
jbe@375 1320 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1321 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1322 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1323 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1324 lua_pushvalue(L, 1); // connection
jbe@374 1325 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1326 lua_pushvalue(L, 10); // this column info
jbe@375 1327 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1328 } else {
jbe@375 1329 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1330 }
jbe@375 1331 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1332 lua_pushvalue(L, 11); // copy of field name
jbe@375 1333 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1334 lua_pushvalue(L, 12); // copy of value
jbe@375 1335 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1336 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1337 }
jbe@375 1338 lua_pushvalue(L, 12); // 13
jbe@374 1339 lua_rawseti(L, 6, col+1);
jbe@374 1340 lua_rawset(L, 8);
jbe@399 1341 lua_settop(L, 9);
jbe/bsw@0 1342 }
jbe/bsw@0 1343 }
jbe/bsw@0 1344 }
jbe@374 1345 lua_settop(L, 5);
jbe/bsw@0 1346 }
jbe@23 1347 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1348 lua_settop(L, 3);
jbe/bsw@0 1349 lua_pushnil(L);
jbe/bsw@0 1350 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1351 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1352 }
jbe/bsw@0 1353 return command_count+1;
jbe/bsw@0 1354 }
jbe/bsw@0 1355
jbe@397 1356 // method "is_kind_of" of error objects:
jbe@397 1357 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe@397 1358 const char *errclass;
jbe@397 1359 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1360 errclass = luaL_checkstring(L, 2);
jbe@397 1361 lua_settop(L, 2);
jbe@397 1362 lua_getfield(L, 1, "code"); // 3
jbe@397 1363 luaL_argcheck(L,
jbe@397 1364 lua_type(L, 3) == LUA_TSTRING,
jbe@397 1365 1,
jbe@397 1366 "field 'code' of error object is not a string"
jbe@397 1367 );
jbe@397 1368 lua_pushboolean(L,
jbe@397 1369 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
jbe@397 1370 );
jbe@397 1371 return 1;
jbe@397 1372 }
jbe@397 1373
jbe@397 1374 // method "wait" of database handles:
jbe@397 1375 static int mondelefant_conn_wait(lua_State *L) {
jbe@397 1376 int argc;
jbe@397 1377 // count number of arguments:
jbe@397 1378 argc = lua_gettop(L);
jbe@397 1379 // insert "try_wait" function/method at stack position 1:
jbe@397 1380 lua_pushcfunction(L, mondelefant_conn_try_wait);
jbe@397 1381 lua_insert(L, 1);
jbe@397 1382 // call "try_wait" method:
jbe@397 1383 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@397 1384 // check, if error occurred:
jbe@397 1385 if (lua_toboolean(L, 1)) {
jbe@397 1386 // raise error
jbe/bsw@0 1387 lua_settop(L, 1);
jbe/bsw@0 1388 return lua_error(L);
jbe/bsw@0 1389 } else {
jbe@397 1390 // return everything but nil error object:
jbe@397 1391 return lua_gettop(L) - 1;
jbe/bsw@0 1392 }
jbe/bsw@0 1393 }
jbe/bsw@0 1394
jbe@23 1395 // method "query" of database handles:
jbe/bsw@0 1396 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1397 int argc;
jbe@23 1398 // count number of arguments:
jbe/bsw@0 1399 argc = lua_gettop(L);
jbe@23 1400 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1401 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1402 lua_insert(L, 1);
jbe@23 1403 // call "try_query" method:
jbe@23 1404 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1405 // check, if error occurred:
jbe@23 1406 if (lua_toboolean(L, 1)) {
jbe@397 1407 // raise error
jbe@397 1408 lua_settop(L, 1);
jbe@397 1409 return lua_error(L);
jbe/bsw@0 1410 } else {
jbe@23 1411 // return everything but nil error object:
jbe@23 1412 return lua_gettop(L) - 1;
jbe/bsw@0 1413 }
jbe/bsw@0 1414 }
jbe/bsw@0 1415
jbe@23 1416 // library function "set_class":
jbe/bsw@0 1417 static int mondelefant_set_class(lua_State *L) {
jbe@23 1418 // ensure that first argument is a database result list/object:
jbe/bsw@0 1419 lua_settop(L, 2);
jbe/bsw@0 1420 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1421 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1422 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@23 1423 // ensure that second argument is a database class (model):
jbe/bsw@0 1424 lua_settop(L, 2);
jbe/bsw@0 1425 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1426 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1427 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@23 1428 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1429 lua_settop(L, 2);
jbe/bsw@0 1430 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1431 lua_setfield(L, 1, "_class");
jbe@23 1432 // test, if database result is a list (and not a single object):
jbe/bsw@0 1433 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1434 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1435 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1436 int i;
jbe@23 1437 // set attribute "_class" of all elements to given class:
jbe@64 1438 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe/bsw@0 1439 lua_settop(L, 2);
jbe/bsw@0 1440 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1441 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1442 lua_setfield(L, 3, "_class");
jbe/bsw@0 1443 }
jbe/bsw@0 1444 }
jbe@23 1445 // return first argument:
jbe/bsw@0 1446 lua_settop(L, 1);
jbe/bsw@0 1447 return 1;
jbe/bsw@0 1448 }
jbe/bsw@0 1449
jbe@23 1450 // library function "new_class":
jbe/bsw@0 1451 static int mondelefant_new_class(lua_State *L) {
jbe@397 1452 // if no argument is given, use an empty table:
jbe@397 1453 if (lua_isnoneornil(L, 1)) {
jbe/bsw@0 1454 lua_settop(L, 0);
jbe/bsw@0 1455 lua_newtable(L); // 1
jbe@397 1456 } else {
jbe@397 1457 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1458 lua_settop(L, 1);
jbe/bsw@0 1459 }
jbe@23 1460 // set meta-table for database classes (models):
jbe@406 1461 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
jbe@23 1462 // check, if "prototype" attribute is not set:
jbe/bsw@0 1463 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1464 lua_rawget(L, 1); // 2
jbe/bsw@0 1465 if (!lua_toboolean(L, 2)) {
jbe@23 1466 // set "prototype" attribute to default prototype:
jbe/bsw@0 1467 lua_pushliteral(L, "prototype"); // 3
jbe@413 1468 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1469 lua_rawset(L, 1);
jbe/bsw@0 1470 }
jbe@23 1471 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1472 lua_settop(L, 1);
jbe/bsw@0 1473 lua_pushliteral(L, "object"); // 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, "object"); // 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 "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1481 lua_settop(L, 1);
jbe/bsw@0 1482 lua_pushliteral(L, "object_get"); // 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, "object_get"); // 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 "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1490 lua_settop(L, 1);
jbe/bsw@0 1491 lua_pushliteral(L, "object_set"); // 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, "object_set"); // 3
jbe/bsw@0 1495 lua_newtable(L); // 4
jbe/bsw@0 1496 lua_rawset(L, 1);
jbe/bsw@0 1497 }
jbe@23 1498 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1499 lua_settop(L, 1);
jbe/bsw@0 1500 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1501 lua_rawget(L, 1); // 2
jbe/bsw@0 1502 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1503 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1504 lua_newtable(L); // 4
jbe/bsw@0 1505 lua_rawset(L, 1);
jbe/bsw@0 1506 }
jbe@23 1507 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1508 lua_settop(L, 1);
jbe/bsw@0 1509 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1510 lua_rawget(L, 1); // 2
jbe/bsw@0 1511 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1512 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1513 lua_newtable(L); // 4
jbe/bsw@0 1514 lua_rawset(L, 1);
jbe/bsw@0 1515 }
jbe@23 1516 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1517 lua_settop(L, 1);
jbe/bsw@0 1518 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1519 lua_rawget(L, 1); // 2
jbe/bsw@0 1520 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1521 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1522 lua_newtable(L); // 4
jbe/bsw@0 1523 lua_rawset(L, 1);
jbe/bsw@0 1524 }
jbe@23 1525 // return table:
jbe/bsw@0 1526 lua_settop(L, 1);
jbe/bsw@0 1527 return 1;
jbe/bsw@0 1528 }
jbe/bsw@0 1529
jbe@23 1530 // method "get_reference" of classes (models):
jbe/bsw@0 1531 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1532 lua_settop(L, 2);
jbe/bsw@0 1533 while (lua_toboolean(L, 1)) {
jbe@23 1534 // get "references" table:
jbe/bsw@0 1535 lua_getfield(L, 1, "references"); // 3
jbe@23 1536 // perform lookup:
jbe/bsw@0 1537 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1538 lua_gettable(L, 3); // 4
jbe@23 1539 // return result, if lookup was successful:
jbe/bsw@0 1540 if (!lua_isnil(L, 4)) return 1;
jbe@23 1541 // replace current table by its prototype:
jbe/bsw@0 1542 lua_settop(L, 2);
jbe/bsw@0 1543 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1544 lua_rawget(L, 1); // 3
jbe/bsw@0 1545 lua_replace(L, 1);
jbe/bsw@0 1546 }
jbe@23 1547 // return nothing:
jbe/bsw@0 1548 return 0;
jbe/bsw@0 1549 }
jbe/bsw@0 1550
jbe@23 1551 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1552 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1553 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1554 }
jbe/bsw@0 1555
jbe@23 1556 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1557 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1558 lua_settop(L, 2);
jbe/bsw@0 1559 while (lua_toboolean(L, 1)) {
jbe@23 1560 // get "foreign_keys" table:
jbe/bsw@0 1561 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1562 // perform lookup:
jbe/bsw@0 1563 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1564 lua_gettable(L, 3); // 4
jbe@23 1565 // return result, if lookup was successful:
jbe/bsw@0 1566 if (!lua_isnil(L, 4)) return 1;
jbe@23 1567 // replace current table by its prototype:
jbe/bsw@0 1568 lua_settop(L, 2);
jbe/bsw@0 1569 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1570 lua_rawget(L, 1); // 3
jbe/bsw@0 1571 lua_replace(L, 1);
jbe/bsw@0 1572 }
jbe@23 1573 // return nothing:
jbe/bsw@0 1574 return 0;
jbe/bsw@0 1575 }
jbe/bsw@0 1576
jbe@23 1577 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1578 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1579 const char *result_type;
jbe@23 1580 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1581 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1582 return 0;
jbe/bsw@0 1583 }
jbe@384 1584 // value of "_class" attribute or default class on stack position 3:
jbe@23 1585 lua_settop(L, 2);
jbe/bsw@0 1586 lua_getfield(L, 1, "_class"); // 3
jbe/bsw@0 1587 if (!lua_toboolean(L, 3)) {
jbe/bsw@0 1588 lua_settop(L, 2);
jbe@413 1589 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe/bsw@0 1590 }
jbe@23 1591 // get value of "_type" attribute:
jbe/bsw@0 1592 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1593 result_type = lua_tostring(L, 4);
jbe@23 1594 // different lookup for lists and objects:
jbe@23 1595 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1596 lua_settop(L, 3);
jbe@384 1597 // try inherited attributes, methods or getter functions:
jbe@383 1598 lua_pushvalue(L, 3); // 4
jbe@383 1599 while (lua_toboolean(L, 4)) {
jbe@383 1600 lua_getfield(L, 4, "object"); // 5
jbe@383 1601 lua_pushvalue(L, 2); // 6
jbe@383 1602 lua_gettable(L, 5); // 6
jbe@383 1603 if (!lua_isnil(L, 6)) return 1;
jbe@383 1604 lua_settop(L, 4);
jbe@383 1605 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1606 lua_pushvalue(L, 2); // 6
jbe@383 1607 lua_gettable(L, 5); // 6
jbe@383 1608 if (lua_toboolean(L, 6)) {
jbe@383 1609 lua_pushvalue(L, 1); // 7
jbe@383 1610 lua_call(L, 1, 1); // 6
jbe/bsw@0 1611 return 1;
jbe/bsw@0 1612 }
jbe@383 1613 lua_settop(L, 4);
jbe@383 1614 lua_pushliteral(L, "prototype"); // 5
jbe@383 1615 lua_rawget(L, 4); // 5
jbe@383 1616 lua_replace(L, 4);
jbe/bsw@0 1617 }
jbe@383 1618 lua_settop(L, 3);
jbe/bsw@0 1619 // try primary keys of referenced objects:
jbe/bsw@0 1620 lua_pushcfunction(L,
jbe/bsw@0 1621 mondelefant_class_get_foreign_key_reference_name
jbe@383 1622 ); // 4
jbe@383 1623 lua_pushvalue(L, 3); // 5
jbe@383 1624 lua_pushvalue(L, 2); // 6
jbe@383 1625 lua_call(L, 2, 1); // 4
jbe@383 1626 if (!lua_isnil(L, 4)) {
jbe@383 1627 // reference name at stack position 4
jbe@383 1628 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1629 lua_pushvalue(L, 3); // 6
jbe@383 1630 lua_pushvalue(L, 4); // 7
jbe@383 1631 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1632 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1633 lua_getfield(L, 5, "ref"); // 7
jbe@383 1634 lua_gettable(L, 6); // 7
jbe@383 1635 if (!lua_isnil(L, 7)) {
jbe@383 1636 if (lua_toboolean(L, 7)) {
jbe@383 1637 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1638 if (lua_isnil(L, 8)) {
jbe/bsw@0 1639 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1640 }
jbe@383 1641 lua_gettable(L, 7); // 8
jbe/bsw@0 1642 } else {
jbe/bsw@0 1643 lua_pushnil(L);
jbe/bsw@0 1644 }
jbe/bsw@0 1645 return 1;
jbe/bsw@0 1646 }
jbe/bsw@0 1647 }
jbe@383 1648 lua_settop(L, 3);
jbe@383 1649 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1650 // try normal data field info:
jbe@383 1651 lua_pushvalue(L, 2); // 5
jbe@383 1652 lua_gettable(L, 4); // 5
jbe@383 1653 if (!lua_isnil(L, 5)) return 1;
jbe@383 1654 lua_settop(L, 4); // keep _data table on stack
jbe/bsw@0 1655 // try cached referenced object (or cached NULL reference):
jbe@383 1656 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1657 lua_pushvalue(L, 2); // 6
jbe@383 1658 lua_gettable(L, 5); // 6
jbe@383 1659 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1660 lua_pushnil(L);
jbe/bsw@0 1661 return 1;
jbe@383 1662 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1663 return 1;
jbe/bsw@0 1664 }
jbe@383 1665 lua_settop(L, 4);
jbe/bsw@0 1666 // try to load a referenced object:
jbe@383 1667 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1668 lua_pushvalue(L, 3); // 6
jbe@383 1669 lua_pushvalue(L, 2); // 7
jbe@383 1670 lua_call(L, 2, 1); // 5
jbe@383 1671 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1672 lua_settop(L, 2);
jbe/bsw@0 1673 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1674 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1675 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1676 lua_call(L, 2, 0);
jbe/bsw@0 1677 lua_settop(L, 2);
jbe/bsw@0 1678 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1679 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1680 lua_gettable(L, 3); // 4
jbe/bsw@0 1681 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1682 return 1;
jbe/bsw@0 1683 }
jbe@383 1684 lua_settop(L, 4);
jbe@383 1685 // try proxy access to document in special column:
jbe@383 1686 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1687 if (lua_toboolean(L, 5)) {
jbe@383 1688 lua_gettable(L, 4); // 5
jbe@383 1689 if (!lua_isnil(L, 5)) {
jbe@383 1690 lua_pushvalue(L, 2); // 6
jbe@383 1691 lua_gettable(L, 5); // 6
jbe@383 1692 if (!lua_isnil(L, 6)) return 1;
jbe@383 1693 }
jbe@383 1694 }
jbe/bsw@0 1695 return 0;
jbe@23 1696 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1697 lua_settop(L, 3);
jbe/bsw@0 1698 // try inherited list attributes or methods:
jbe/bsw@0 1699 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1700 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1701 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1702 lua_gettable(L, 4); // 5
jbe/bsw@0 1703 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1704 lua_settop(L, 3);
jbe/bsw@0 1705 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1706 lua_rawget(L, 3); // 4
jbe/bsw@0 1707 lua_replace(L, 3);
jbe/bsw@0 1708 }
jbe/bsw@0 1709 }
jbe@23 1710 // return nothing:
jbe/bsw@0 1711 return 0;
jbe/bsw@0 1712 }
jbe/bsw@0 1713
jbe@23 1714 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1715 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1716 const char *result_type;
jbe@23 1717 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1718 lua_settop(L, 3);
jbe/bsw@0 1719 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1720 lua_rawset(L, 1);
jbe/bsw@0 1721 return 1;
jbe/bsw@0 1722 }
jbe@384 1723 // value of "_class" attribute or default class on stack position 4:
jbe@384 1724 lua_settop(L, 3);
jbe/bsw@0 1725 lua_getfield(L, 1, "_class"); // 4
jbe/bsw@0 1726 if (!lua_toboolean(L, 4)) {
jbe/bsw@0 1727 lua_settop(L, 3);
jbe@413 1728 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1729 }
jbe@23 1730 // get value of "_type" attribute:
jbe/bsw@0 1731 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1732 result_type = lua_tostring(L, 5);
jbe@378 1733 // distinguish between lists and objects:
jbe@378 1734 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1735 lua_settop(L, 4);
jbe@378 1736 // try object setter functions:
jbe@384 1737 lua_pushvalue(L, 4); // 5
jbe@384 1738 while (lua_toboolean(L, 5)) {
jbe@384 1739 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1740 lua_pushvalue(L, 2); // 7
jbe@384 1741 lua_gettable(L, 6); // 7
jbe@384 1742 if (lua_toboolean(L, 7)) {
jbe@384 1743 lua_pushvalue(L, 1); // 8
jbe@384 1744 lua_pushvalue(L, 3); // 9
jbe@378 1745 lua_call(L, 2, 0);
jbe@378 1746 return 0;
jbe@378 1747 }
jbe@384 1748 lua_settop(L, 5);
jbe@384 1749 lua_pushliteral(L, "prototype"); // 6
jbe@384 1750 lua_rawget(L, 5); // 6
jbe@384 1751 lua_replace(L, 5);
jbe@378 1752 }
jbe@384 1753 lua_settop(L, 4);
jbe@384 1754 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1755 // check, if a object reference is changed:
jbe@384 1756 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1757 lua_pushvalue(L, 4); // 7
jbe@384 1758 lua_pushvalue(L, 2); // 8
jbe@384 1759 lua_call(L, 2, 1); // 6
jbe@384 1760 if (!lua_isnil(L, 6)) {
jbe/bsw@0 1761 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1762 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1763 lua_pushvalue(L, 2); // 8
jbe@384 1764 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1765 else lua_pushvalue(L, 3); // 9
jbe@384 1766 lua_settable(L, 7);
jbe@384 1767 lua_settop(L, 6);
jbe/bsw@0 1768 // delete referencing key from _data table:
jbe@384 1769 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1770 if (lua_isnil(L, 7)) {
jbe/bsw@0 1771 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1772 }
jbe@384 1773 lua_pushvalue(L, 7); // 8
jbe@384 1774 lua_pushnil(L); // 9
jbe@384 1775 lua_settable(L, 5);
jbe@384 1776 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1777 lua_pushvalue(L, 7); // 9
jbe@384 1778 lua_pushboolean(L, 1); // 10
jbe@384 1779 lua_settable(L, 8);
jbe@384 1780 return 0;
jbe@384 1781 }
jbe@384 1782 lua_settop(L, 5);
jbe@384 1783 // check proxy access to document in special column:
jbe@384 1784 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1785 if (lua_toboolean(L, 6)) {
jbe@384 1786 lua_getfield(L, 1, "_column_info"); // 7
jbe@401 1787 if (!lua_isnil(L, 7)) { // TODO: quick fix to avoid problems on document creation
jbe@384 1788 lua_pushvalue(L, 2); // 8
jbe@384 1789 lua_gettable(L, 7); // 8
jbe@400 1790 if (!lua_toboolean(L, 8)) {
jbe@384 1791 lua_settop(L, 6);
jbe@384 1792 lua_gettable(L, 5); // 6
jbe@384 1793 if (lua_isnil(L, 6)) {
jbe@384 1794 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1795 }
jbe@384 1796 lua_pushvalue(L, 2); // 7
jbe@384 1797 lua_pushvalue(L, 3); // 8
jbe@384 1798 lua_settable(L, 6);
jbe@384 1799 return 0;
jbe@384 1800 }
jbe@401 1801 } // TODO: quick fix to avoid problems on document creation
jbe@384 1802 }
jbe@384 1803 lua_settop(L, 5);
jbe@384 1804 // store value in data field info:
jbe@384 1805 lua_pushvalue(L, 2); // 6
jbe@384 1806 lua_pushvalue(L, 3); // 7
jbe@384 1807 lua_settable(L, 5);
jbe@384 1808 lua_settop(L, 4);
jbe@384 1809 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1810 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1811 lua_pushvalue(L, 2); // 6
jbe@384 1812 lua_pushboolean(L, 1); // 7
jbe@384 1813 lua_settable(L, 5);
jbe@384 1814 lua_settop(L, 4);
jbe@384 1815 // reset reference cache, if neccessary:
jbe@384 1816 lua_pushcfunction(L,
jbe@384 1817 mondelefant_class_get_foreign_key_reference_name
jbe@384 1818 ); // 5
jbe@384 1819 lua_pushvalue(L, 4); // 6
jbe@384 1820 lua_pushvalue(L, 2); // 7
jbe@384 1821 lua_call(L, 2, 1); // 5
jbe@384 1822 if (!lua_isnil(L, 5)) {
jbe@384 1823 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1824 lua_pushvalue(L, 5); // 7
jbe@382 1825 lua_pushnil(L); // 8
jbe@382 1826 lua_settable(L, 6);
jbe/bsw@0 1827 }
jbe/bsw@0 1828 return 0;
jbe@23 1829 } else { // non-objects (i.e. lists)
jbe@23 1830 // perform rawset:
jbe/bsw@0 1831 lua_settop(L, 3);
jbe/bsw@0 1832 lua_rawset(L, 1);
jbe/bsw@0 1833 return 0;
jbe/bsw@0 1834 }
jbe/bsw@0 1835 }
jbe/bsw@0 1836
jbe@23 1837 // meta-method "__index" of classes (models):
jbe/bsw@0 1838 static int mondelefant_class_index(lua_State *L) {
jbe@23 1839 // perform lookup in prototype:
jbe/bsw@0 1840 lua_settop(L, 2);
jbe/bsw@0 1841 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1842 lua_rawget(L, 1); // 3
jbe/bsw@0 1843 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1844 lua_gettable(L, 3); // 4
jbe/bsw@0 1845 return 1;
jbe/bsw@0 1846 }
jbe/bsw@0 1847
jbe@23 1848 // registration information for functions of library:
jbe/bsw@0 1849 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1850 {"connect", mondelefant_connect},
jbe/bsw@0 1851 {"set_class", mondelefant_set_class},
jbe/bsw@0 1852 {"new_class", mondelefant_new_class},
jbe/bsw@0 1853 {NULL, NULL}
jbe/bsw@0 1854 };
jbe/bsw@0 1855
jbe@23 1856 // registration information for meta-methods of database connections:
jbe/bsw@0 1857 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1858 {"__gc", mondelefant_conn_free},
jbe/bsw@0 1859 {"__index", mondelefant_conn_index},
jbe/bsw@0 1860 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 1861 {NULL, NULL}
jbe/bsw@0 1862 };
jbe/bsw@0 1863
jbe@23 1864 // registration information for methods of database connections:
jbe/bsw@0 1865 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 1866 {"close", mondelefant_conn_close},
jbe/bsw@0 1867 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 1868 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@397 1869 {"try_wait", mondelefant_conn_try_wait},
jbe@393 1870 {"wait", mondelefant_conn_wait},
jbe/bsw@0 1871 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 1872 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 1873 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 1874 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 1875 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 1876 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 1877 {"query", mondelefant_conn_query},
jbe/bsw@0 1878 {NULL, NULL}
jbe/bsw@0 1879 };
jbe/bsw@0 1880
jbe@23 1881 // registration information for meta-methods of error objects:
jbe/bsw@0 1882 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe/bsw@0 1883 {NULL, NULL}
jbe/bsw@0 1884 };
jbe/bsw@0 1885
jbe@23 1886 // registration information for methods of error objects:
jbe/bsw@0 1887 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe@397 1888 {"escalate", lua_error},
jbe/bsw@0 1889 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 1890 {NULL, NULL}
jbe/bsw@0 1891 };
jbe/bsw@0 1892
jbe@23 1893 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 1894 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 1895 {"__index", mondelefant_result_index},
jbe/bsw@0 1896 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 1897 {NULL, NULL}
jbe/bsw@0 1898 };
jbe/bsw@0 1899
jbe@23 1900 // registration information for methods of database result lists/objects:
jbe/bsw@0 1901 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 1902 {"__index", mondelefant_class_index},
jbe/bsw@0 1903 {NULL, NULL}
jbe/bsw@0 1904 };
jbe/bsw@0 1905
jbe@23 1906 // registration information for methods of classes (models):
jbe/bsw@0 1907 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 1908 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 1909 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 1910 {"get_foreign_key_reference_name",
jbe/bsw@0 1911 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 1912 {NULL, NULL}
jbe/bsw@0 1913 };
jbe/bsw@0 1914
jbe@23 1915 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 1916 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 1917 {NULL, NULL}
jbe/bsw@0 1918 };
jbe/bsw@0 1919
jbe@23 1920 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 1921 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 1922 {NULL, NULL}
jbe/bsw@0 1923 };
jbe/bsw@0 1924
jbe@23 1925 // luaopen function to initialize/register library:
jbe/bsw@0 1926 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 1927 lua_settop(L, 0);
jbe/bsw@0 1928 lua_newtable(L); // module at stack position 1
jbe@64 1929 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe/bsw@0 1930
jbe/bsw@0 1931 lua_pushvalue(L, 1); // 2
jbe/bsw@0 1932 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 1933
jbe/bsw@0 1934 lua_newtable(L); // 2
jbe/bsw@0 1935 // NOTE: only PostgreSQL is supported yet:
jbe@64 1936 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe/bsw@0 1937 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 1938 lua_newtable(L); // 2
jbe/bsw@0 1939 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 1940
jbe/bsw@0 1941 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 1942 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe/bsw@0 1943 lua_settop(L, 1);
jbe/bsw@0 1944 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 1945 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe/bsw@0 1946 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 1947 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 1948 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe/bsw@0 1949 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 1950
jbe/bsw@0 1951 lua_newtable(L); // 2
jbe@272 1952 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe/bsw@0 1953 lua_newtable(L); // 3
jbe@64 1954 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe/bsw@0 1955 lua_setfield(L, 2, "object");
jbe/bsw@0 1956 lua_newtable(L); // 3
jbe/bsw@0 1957 lua_setfield(L, 2, "object_get");
jbe/bsw@0 1958 lua_newtable(L); // 3
jbe/bsw@0 1959 lua_setfield(L, 2, "object_set");
jbe/bsw@0 1960 lua_newtable(L); // 3
jbe@64 1961 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe/bsw@0 1962 lua_setfield(L, 2, "list");
jbe/bsw@0 1963 lua_newtable(L); // 3
jbe/bsw@0 1964 lua_setfield(L, 2, "references");
jbe/bsw@0 1965 lua_newtable(L); // 3
jbe/bsw@0 1966 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 1967 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1968 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 1969 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 1970
jbe/bsw@0 1971 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 1972 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe/bsw@0 1973 lua_newtable(L); // 3
jbe@64 1974 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe/bsw@0 1975 lua_setfield(L, 2, "__index");
jbe/bsw@0 1976 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 1977
jbe/bsw@0 1978 return 1;
jbe/bsw@0 1979 }

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