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annotate libraries/mondelefant/mondelefant_native.c @ 416:046927075270

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Proxy table to directly access column-values of a database row (e.g. if document_column is set or for reserved method names)
author jbe
date Sat Jan 09 19:29:36 2016 +0100 (2016-01-09)
parents 0dff5e2f659c
children 03f4f905a41a
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@416 26 // registry key of meta-table for column proxy:
jbe@416 27 #define MONDELEFANT_COLUMNS_MT_REGKEY (MONDELEFANT_REGKEY "columns")
jbe@416 28 // table (lightuserdata) key to store result object in column proxy:
jbe@416 29 // (address of struct used as unique reference)
jbe@416 30 #define MONDELEFANT_COLUMNS_RESULT_LUKEY ((void *)&mondelefant_columns_result_lukey_dummy)
jbe@416 31
jbe@416 32 // dummy variable for MONDELEFANT_COLUMNS_RESULT_LUKEY reference:
jbe@416 33 char mondelefant_columns_result_lukey_dummy;
jbe/bsw@0 34
jbe@23 35 // C-structure for database connection userdata:
jbe/bsw@0 36 typedef struct {
jbe/bsw@0 37 PGconn *pgconn;
jbe/bsw@0 38 int server_encoding;
jbe@408 39 void *todo_PQfreemem;
jbe@408 40 PGresult *todo_PQclear;
jbe/bsw@0 41 } mondelefant_conn_t;
jbe@23 42 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
jbe@23 43 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
jbe/bsw@0 44
jbe@23 45 // transform codepoint-position to byte-position for a given UTF-8 string:
jbe/bsw@0 46 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
jbe/bsw@0 47 size_t bytepos;
jbe/bsw@0 48 for (bytepos = 0; utf8pos > 0; bytepos++) {
jbe/bsw@0 49 uint8_t c;
jbe/bsw@0 50 c = ((const uint8_t *)str)[bytepos];
jbe/bsw@0 51 if (!c) break;
jbe/bsw@0 52 if (c <= 0x7f || c >= 0xc0) utf8pos--;
jbe/bsw@0 53 }
jbe/bsw@0 54 return bytepos;
jbe/bsw@0 55 }
jbe/bsw@0 56
jbe@23 57 // PostgreSQL's OID for binary data type (bytea):
jbe/bsw@0 58 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
jbe/bsw@0 59
jbe@23 60 // mapping a PostgreSQL type given by its OID to a string identifier:
jbe/bsw@0 61 static const char *mondelefant_oid_to_typestr(Oid oid) {
jbe/bsw@0 62 switch (oid) {
jbe/bsw@0 63 case 16: return "bool";
jbe/bsw@0 64 case 17: return "bytea";
jbe/bsw@0 65 case 18: return "char";
jbe/bsw@0 66 case 19: return "name";
jbe/bsw@0 67 case 20: return "int8";
jbe/bsw@0 68 case 21: return "int2";
jbe/bsw@0 69 case 23: return "int4";
jbe/bsw@0 70 case 25: return "text";
jbe/bsw@0 71 case 26: return "oid";
jbe/bsw@0 72 case 27: return "tid";
jbe/bsw@0 73 case 28: return "xid";
jbe/bsw@0 74 case 29: return "cid";
jbe@176 75 case 114: return "json";
jbe/bsw@0 76 case 600: return "point";
jbe/bsw@0 77 case 601: return "lseg";
jbe/bsw@0 78 case 602: return "path";
jbe/bsw@0 79 case 603: return "box";
jbe/bsw@0 80 case 604: return "polygon";
jbe/bsw@0 81 case 628: return "line";
jbe/bsw@0 82 case 700: return "float4";
jbe/bsw@0 83 case 701: return "float8";
jbe/bsw@0 84 case 705: return "unknown";
jbe/bsw@0 85 case 718: return "circle";
jbe/bsw@0 86 case 790: return "money";
jbe/bsw@0 87 case 829: return "macaddr";
jbe/bsw@0 88 case 869: return "inet";
jbe/bsw@0 89 case 650: return "cidr";
jbe/bsw@0 90 case 1042: return "bpchar";
jbe/bsw@0 91 case 1043: return "varchar";
jbe/bsw@0 92 case 1082: return "date";
jbe/bsw@0 93 case 1083: return "time";
jbe/bsw@0 94 case 1114: return "timestamp";
jbe/bsw@0 95 case 1184: return "timestamptz";
jbe/bsw@0 96 case 1186: return "interval";
jbe/bsw@0 97 case 1266: return "timetz";
jbe/bsw@0 98 case 1560: return "bit";
jbe/bsw@0 99 case 1562: return "varbit";
jbe/bsw@0 100 case 1700: return "numeric";
jbe@176 101 case 3802: return "jsonb";
jbe/bsw@0 102 default: return NULL;
jbe/bsw@0 103 }
jbe/bsw@0 104 }
jbe/bsw@0 105
jbe@23 106 // This library maps PostgreSQL's error codes to CamelCase string
jbe@23 107 // identifiers, which consist of CamelCase identifiers and are seperated
jbe@23 108 // by dots (".") (no leading or trailing dots).
jbe@23 109 // There are additional error identifiers which do not have a corresponding
jbe@23 110 // PostgreSQL error associated with it.
jbe@23 111
jbe@23 112 // matching start of local variable 'pgcode' against string 'incode',
jbe@23 113 // returning string 'outcode' on match:
jbe/bsw@0 114 #define mondelefant_errcode_item(incode, outcode) \
jbe/bsw@0 115 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
jbe/bsw@0 116
jbe@23 117 // additional error identifiers without corresponding PostgreSQL error:
jbe/bsw@0 118 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
jbe/bsw@0 119 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
jbe/bsw@0 120 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
jbe/bsw@0 121 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
jbe/bsw@0 122 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
jbe/bsw@0 123 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
jbe/bsw@0 124
jbe@23 125 // mapping PostgreSQL error code to error code as returned by this library:
jbe/bsw@0 126 static const char *mondelefant_translate_errcode(const char *pgcode) {
jbe/bsw@0 127 if (!pgcode) abort(); // should not happen
jbe/bsw@0 128 mondelefant_errcode_item("02", "NoData")
jbe/bsw@0 129 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
jbe/bsw@0 130 mondelefant_errcode_item("08", "ConnectionException")
jbe/bsw@0 131 mondelefant_errcode_item("09", "TriggeredActionException")
jbe/bsw@0 132 mondelefant_errcode_item("0A", "FeatureNotSupported")
jbe/bsw@0 133 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
jbe/bsw@0 134 mondelefant_errcode_item("0F", "LocatorException")
jbe/bsw@0 135 mondelefant_errcode_item("0L", "InvalidGrantor")
jbe/bsw@0 136 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
jbe/bsw@0 137 mondelefant_errcode_item("21", "CardinalityViolation")
jbe/bsw@0 138 mondelefant_errcode_item("22", "DataException")
jbe/bsw@0 139 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
jbe/bsw@0 140 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
jbe/bsw@0 141 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
jbe/bsw@0 142 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
jbe/bsw@0 143 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
jbe/bsw@0 144 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
jbe/bsw@0 145 mondelefant_errcode_item("24", "InvalidCursorState")
jbe/bsw@0 146 mondelefant_errcode_item("25", "InvalidTransactionState")
jbe/bsw@0 147 mondelefant_errcode_item("26", "InvalidSqlStatementName")
jbe/bsw@0 148 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
jbe/bsw@0 149 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
jbe/bsw@0 150 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
jbe/bsw@0 151 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
jbe/bsw@0 152 mondelefant_errcode_item("2F", "SqlRoutineException")
jbe/bsw@0 153 mondelefant_errcode_item("34", "InvalidCursorName")
jbe/bsw@0 154 mondelefant_errcode_item("38", "ExternalRoutineException")
jbe/bsw@0 155 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
jbe/bsw@0 156 mondelefant_errcode_item("3B", "SavepointException")
jbe/bsw@0 157 mondelefant_errcode_item("3D", "InvalidCatalogName")
jbe/bsw@0 158 mondelefant_errcode_item("3F", "InvalidSchemaName")
jbe/bsw@0 159 mondelefant_errcode_item("40", "TransactionRollback")
jbe/bsw@0 160 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
jbe/bsw@0 161 mondelefant_errcode_item("44", "WithCheckOptionViolation")
jbe/bsw@0 162 mondelefant_errcode_item("53", "InsufficientResources")
jbe/bsw@0 163 mondelefant_errcode_item("54", "ProgramLimitExceeded")
jbe/bsw@0 164 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
jbe/bsw@0 165 mondelefant_errcode_item("57", "OperatorIntervention")
jbe/bsw@0 166 mondelefant_errcode_item("58", "SystemError")
jbe/bsw@0 167 mondelefant_errcode_item("F0", "ConfigurationFileError")
jbe/bsw@0 168 mondelefant_errcode_item("P0", "PlpgsqlError")
jbe/bsw@0 169 mondelefant_errcode_item("XX", "InternalError")
jbe/bsw@0 170 return "unknown";
jbe/bsw@0 171 }
jbe/bsw@0 172
jbe@23 173 // C-function, checking if a given error code (as defined by this library)
jbe@23 174 // is belonging to a certain class of errors (strings are equal or error
jbe@23 175 // code begins with error class followed by a dot):
jbe/bsw@0 176 static int mondelefant_check_error_class(
jbe/bsw@0 177 const char *errcode, const char *errclass
jbe/bsw@0 178 ) {
jbe/bsw@0 179 size_t i = 0;
jbe/bsw@0 180 while (1) {
jbe/bsw@0 181 if (errclass[i] == 0) {
jbe/bsw@0 182 if (errcode[i] == 0 || errcode[i] == '.') return 1;
jbe/bsw@0 183 else return 0;
jbe/bsw@0 184 }
jbe/bsw@0 185 if (errcode[i] != errclass[i]) return 0;
jbe/bsw@0 186 i++;
jbe/bsw@0 187 }
jbe/bsw@0 188 }
jbe/bsw@0 189
jbe@23 190 // pushing first line of a string on Lua's stack (without trailing CR/LF):
jbe/bsw@0 191 static void mondelefant_push_first_line(lua_State *L, const char *str) {
jbe/bsw@0 192 size_t i = 0;
jbe/bsw@0 193 if (!str) abort(); // should not happen
jbe/bsw@0 194 while (1) {
jbe@397 195 char c = str[i];
jbe@397 196 if (c == '\n' || c == '\r' || c == 0) {
jbe@397 197 lua_pushlstring(L, str, i);
jbe@397 198 return;
jbe@397 199 }
jbe/bsw@0 200 i++;
jbe@397 201 }
jbe/bsw@0 202 }
jbe/bsw@0 203
jbe@23 204 // "connect" function of library, which establishes a database connection
jbe@23 205 // and returns a database connection handle:
jbe/bsw@0 206 static int mondelefant_connect(lua_State *L) {
jbe@23 207 const char *conninfo; // string for PQconnectdb function
jbe@23 208 mondelefant_conn_t *conn; // C-structure for userdata
jbe@402 209 // check if string is given as first argument:
jbe@402 210 if (lua_type(L, 1) != LUA_TSTRING) {
jbe@402 211 // expect a table as first argument if no string is given:
jbe@402 212 luaL_checktype(L, 1, LUA_TTABLE);
jbe@406 213 // extract conninfo string for PQconnectdb if possible:
jbe@406 214 lua_getfield(L, 1, "conninfo");
jbe@406 215 if (!lua_isnil(L, -1)) {
jbe@402 216 // if yes, use that value but check its type:
jbe@406 217 luaL_argcheck(L, lua_type(L, -1) == LUA_TSTRING, 1, "\"conninfo\" value is not a string");
jbe@402 218 } else {
jbe@402 219 // otherwise assemble conninfo string from the named options:
jbe@402 220 luaL_Buffer buf;
jbe@40 221 int need_seperator = 0;
jbe@402 222 const char *value;
jbe@402 223 size_t value_len;
jbe@402 224 size_t value_pos = 0;
jbe@402 225 lua_settop(L, 1);
jbe@402 226 lua_pushnil(L); // slot for key at stack position 2
jbe@402 227 lua_pushnil(L); // slot for value at stack position 3
jbe@402 228 luaL_buffinit(L, &buf);
jbe@40 229 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
jbe@402 230 luaL_argcheck(L, lua_isstring(L, -2), 1, "key in table is not a string");
jbe@402 231 luaL_argcheck(L, lua_isstring(L, -1), 1, "value in table is not a string");
jbe@402 232 value = lua_tolstring(L, -1, &value_len);
jbe@40 233 lua_replace(L, 3);
jbe@402 234 lua_pop(L, 1);
jbe@40 235 lua_replace(L, 2);
jbe@402 236 if (need_seperator) luaL_addchar(&buf, ' ');
jbe@40 237 // NOTE: numbers will be converted to strings automatically here,
jbe@40 238 // but perhaps this will change in future versions of lua
jbe@40 239 lua_pushvalue(L, 2);
jbe@402 240 luaL_addvalue(&buf);
jbe@402 241 luaL_addchar(&buf, '=');
jbe@402 242 luaL_addchar(&buf, '\'');
jbe@402 243 do {
jbe@402 244 char c;
jbe@402 245 c = value[value_pos++];
jbe@402 246 if (c == '\'') luaL_addchar(&buf, '\\');
jbe@402 247 luaL_addchar(&buf, c);
jbe@402 248 } while (value_pos < value_len);
jbe@402 249 luaL_addchar(&buf, '\'');
jbe@402 250 need_seperator = 1;
jbe/bsw@0 251 }
jbe@402 252 luaL_pushresult(&buf);
jbe/bsw@0 253 }
jbe@402 254 // ensure that string is on stack position 1 which is the top of stack:
jbe@402 255 lua_replace(L, 1);
jbe/bsw@0 256 }
jbe@402 257 // use conninfo string on stack position 1:
jbe@402 258 conninfo = lua_tostring(L, 1);
jbe@406 259 // create userdata on stack position 2:
jbe@406 260 lua_settop(L, 1);
jbe@406 261 conn = lua_newuserdata(L, sizeof(*conn)); // 2
jbe@23 262 // call PQconnectdb function of libpq:
jbe@406 263 conn->pgconn = PQconnectdb(conninfo);
jbe@406 264 // try emergency garbage collection on first failure:
jbe@406 265 if (!conn->pgconn) {
jbe@406 266 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@406 267 conn->pgconn = PQconnectdb(conninfo);
jbe@407 268 // throw error in case of (unexpected) error of PQconnectdb call:
jbe@407 269 if (!conn->pgconn) return luaL_error(L,
jbe@407 270 "Error in libpq while creating 'PGconn' structure."
jbe@407 271 );
jbe/bsw@0 272 }
jbe@406 273 // set metatable for userdata (ensure PQfinish on unexpected error below):
jbe@406 274 luaL_setmetatable(L, MONDELEFANT_CONN_MT_REGKEY);
jbe@406 275 // check result of PQconnectdb call:
jbe@406 276 if (PQstatus(conn->pgconn) != CONNECTION_OK) {
jbe@406 277 lua_pushnil(L); // 3
jbe@406 278 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 4
jbe@406 279 lua_newtable(L); // 5
jbe@406 280 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 281 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@406 282 lua_setfield(L, 5, "code");
jbe@406 283 lua_pushvalue(L, 4);
jbe@406 284 lua_setfield(L, 5, "message");
jbe@406 285 // manual PQfinish (do not wait until garbage collection):
jbe@406 286 PQfinish(conn->pgconn);
jbe@406 287 conn->pgconn = NULL;
jbe/bsw@0 288 return 3;
jbe/bsw@0 289 }
jbe@23 290 // set 'server_encoding' in C-struct of userdata:
jbe/bsw@0 291 {
jbe/bsw@0 292 const char *charset;
jbe@406 293 charset = PQparameterStatus(conn->pgconn, "server_encoding");
jbe/bsw@0 294 if (charset && !strcmp(charset, "UTF8")) {
jbe/bsw@0 295 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
jbe/bsw@0 296 } else {
jbe/bsw@0 297 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
jbe/bsw@0 298 }
jbe/bsw@0 299 }
jbe@396 300 // create and associate userdata table:
jbe@396 301 lua_newtable(L);
jbe@406 302 lua_setuservalue(L, 2);
jbe@396 303 // store key "fd" with file descriptor of connection:
jbe@406 304 lua_pushinteger(L, PQsocket(conn->pgconn));
jbe@406 305 lua_setfield(L, 2, "fd");
jbe@23 306 // store key "engine" with value "postgresql" as connection specific data:
jbe/bsw@0 307 lua_pushliteral(L, "postgresql");
jbe@406 308 lua_setfield(L, 2, "engine");
jbe@23 309 // return userdata:
jbe/bsw@0 310 return 1;
jbe/bsw@0 311 }
jbe/bsw@0 312
jbe@23 313 // returns pointer to libpq handle 'pgconn' of userdata at given index
jbe@23 314 // (or throws error, if database connection has been closed):
jbe/bsw@0 315 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
jbe/bsw@0 316 mondelefant_conn_t *conn;
jbe/bsw@0 317 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 318 if (!conn->pgconn) {
jbe/bsw@0 319 luaL_error(L, "PostgreSQL connection has been closed.");
jbe/bsw@0 320 return NULL;
jbe/bsw@0 321 }
jbe/bsw@0 322 return conn;
jbe/bsw@0 323 }
jbe/bsw@0 324
jbe@23 325 // meta-method "__index" of database handles (userdata):
jbe/bsw@0 326 static int mondelefant_conn_index(lua_State *L) {
jbe@23 327 // try table for connection specific data:
jbe/bsw@0 328 lua_settop(L, 2);
jbe@396 329 lua_getuservalue(L, 1); // 3
jbe/bsw@0 330 lua_pushvalue(L, 2); // 4
jbe/bsw@0 331 lua_gettable(L, 3); // 4
jbe/bsw@0 332 if (!lua_isnil(L, 4)) return 1;
jbe@23 333 // try to use prototype stored in connection specific data:
jbe/bsw@0 334 lua_settop(L, 3);
jbe/bsw@0 335 lua_getfield(L, 3, "prototype"); // 4
jbe/bsw@0 336 if (lua_toboolean(L, 4)) {
jbe/bsw@0 337 lua_pushvalue(L, 2); // 5
jbe/bsw@0 338 lua_gettable(L, 4); // 5
jbe/bsw@0 339 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 340 }
jbe@23 341 // try to use "postgresql_connection_prototype" of library:
jbe/bsw@0 342 lua_settop(L, 2);
jbe/bsw@0 343 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
jbe/bsw@0 344 lua_getfield(L, 3, "postgresql_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 // try to use "connection_prototype" of library:
jbe/bsw@0 351 lua_settop(L, 3);
jbe/bsw@0 352 lua_getfield(L, 3, "connection_prototype"); // 4
jbe/bsw@0 353 if (lua_toboolean(L, 4)) {
jbe/bsw@0 354 lua_pushvalue(L, 2); // 5
jbe/bsw@0 355 lua_gettable(L, 4); // 5
jbe/bsw@0 356 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 357 }
jbe@23 358 // give up and return nothing:
jbe/bsw@0 359 return 0;
jbe/bsw@0 360 }
jbe/bsw@0 361
jbe@23 362 // meta-method "__newindex" of database handles (userdata):
jbe/bsw@0 363 static int mondelefant_conn_newindex(lua_State *L) {
jbe@23 364 // store key-value pair in table for connection specific data:
jbe/bsw@0 365 lua_settop(L, 3);
jbe@396 366 lua_getuservalue(L, 1); // 4
jbe/bsw@0 367 lua_pushvalue(L, 2);
jbe/bsw@0 368 lua_pushvalue(L, 3);
jbe/bsw@0 369 lua_settable(L, 4);
jbe@23 370 // return nothing:
jbe/bsw@0 371 return 0;
jbe/bsw@0 372 }
jbe/bsw@0 373
jbe@23 374 // meta-method "__gc" of database handles:
jbe/bsw@0 375 static int mondelefant_conn_free(lua_State *L) {
jbe/bsw@0 376 mondelefant_conn_t *conn;
jbe/bsw@0 377 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@410 378 if (conn->todo_PQfreemem) {
jbe@410 379 PQfreemem(conn->todo_PQfreemem);
jbe@410 380 conn->todo_PQfreemem = NULL;
jbe@410 381 }
jbe@410 382 if (conn->todo_PQclear) {
jbe@410 383 PQclear(conn->todo_PQclear);
jbe@410 384 conn->todo_PQclear = NULL;
jbe@410 385 }
jbe@410 386 if (conn->pgconn) {
jbe@410 387 PQfinish(conn->pgconn);
jbe@410 388 conn->pgconn = NULL;
jbe@410 389 }
jbe/bsw@0 390 return 0;
jbe/bsw@0 391 }
jbe/bsw@0 392
jbe@23 393 // method "close" of database handles:
jbe/bsw@0 394 static int mondelefant_conn_close(lua_State *L) {
jbe/bsw@0 395 mondelefant_conn_t *conn;
jbe/bsw@0 396 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 397 PQfinish(conn->pgconn);
jbe/bsw@0 398 conn->pgconn = NULL;
jbe@397 399 lua_pushnil(L);
jbe@396 400 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
jbe/bsw@0 401 return 0;
jbe/bsw@0 402 }
jbe/bsw@0 403
jbe@23 404 // method "is_okay" of database handles:
jbe/bsw@0 405 static int mondelefant_conn_is_ok(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 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
jbe/bsw@0 409 return 1;
jbe/bsw@0 410 }
jbe/bsw@0 411
jbe@23 412 // method "get_transaction_status" of database handles:
jbe/bsw@0 413 static int mondelefant_conn_get_transaction_status(lua_State *L) {
jbe/bsw@0 414 mondelefant_conn_t *conn;
jbe/bsw@0 415 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 416 switch (PQtransactionStatus(conn->pgconn)) {
jbe/bsw@0 417 case PQTRANS_IDLE:
jbe/bsw@0 418 lua_pushliteral(L, "idle");
jbe/bsw@0 419 break;
jbe/bsw@0 420 case PQTRANS_ACTIVE:
jbe/bsw@0 421 lua_pushliteral(L, "active");
jbe/bsw@0 422 break;
jbe/bsw@0 423 case PQTRANS_INTRANS:
jbe/bsw@0 424 lua_pushliteral(L, "intrans");
jbe/bsw@0 425 break;
jbe/bsw@0 426 case PQTRANS_INERROR:
jbe/bsw@0 427 lua_pushliteral(L, "inerror");
jbe/bsw@0 428 break;
jbe/bsw@0 429 default:
jbe/bsw@0 430 lua_pushliteral(L, "unknown");
jbe/bsw@0 431 }
jbe/bsw@0 432 return 1;
jbe/bsw@0 433 }
jbe/bsw@0 434
jbe@397 435 // method "try_wait" of database handles:
jbe@397 436 static int mondelefant_conn_try_wait(lua_State *L) {
jbe@393 437 mondelefant_conn_t *conn;
jbe@393 438 int infinite, nonblock = 0;
jbe@393 439 struct timespec wakeup;
jbe@393 440 int fd;
jbe@393 441 fd_set fds;
jbe@393 442 conn = mondelefant_get_conn(L, 1);
jbe@393 443 infinite = lua_isnoneornil(L, 2);
jbe@393 444 if (!infinite) {
jbe@393 445 lua_Number n;
jbe@393 446 int isnum;
jbe@393 447 n = lua_tonumberx(L, 2, &isnum);
jbe@393 448 if (isnum && n>0 && n<=86400*366) {
jbe@393 449 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
jbe@393 450 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 451 }
jbe@393 452 wakeup.tv_sec += n;
jbe@393 453 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
jbe@393 454 if (wakeup.tv_nsec >= 1000000000) {
jbe@393 455 wakeup.tv_sec += 1;
jbe@393 456 wakeup.tv_nsec -= 1000000000;
jbe@393 457 }
jbe@393 458 } else if (isnum && n==0) {
jbe@393 459 nonblock = 1;
jbe@393 460 } else {
jbe@393 461 luaL_argcheck(L, 0, 2, "not a valid timeout");
jbe@393 462 }
jbe@393 463 }
jbe@397 464 lua_settop(L, 1);
jbe@393 465 if (!nonblock) {
jbe@393 466 fd = PQsocket(conn->pgconn);
jbe@393 467 FD_ZERO(&fds);
jbe@393 468 FD_SET(fd, &fds);
jbe@393 469 }
jbe@393 470 while (true) {
jbe@393 471 {
jbe@393 472 PGnotify *notify;
jbe@393 473 if (!PQconsumeInput(conn->pgconn)) {
jbe@397 474 lua_newtable(L); // 2
jbe@406 475 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe@397 476 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@397 477 lua_setfield(L, 2, "code");
jbe@397 478 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 3
jbe@397 479 lua_setfield(L, 2, "message");
jbe@397 480 return 1;
jbe@393 481 }
jbe@412 482 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 483 if (conn->todo_PQfreemem) {
jbe@412 484 PQfreemem(conn->todo_PQfreemem);
jbe@412 485 conn->todo_PQfreemem = NULL;
jbe@412 486 }
jbe@393 487 notify = PQnotifies(conn->pgconn);
jbe@393 488 if (notify) {
jbe@412 489 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@412 490 conn->todo_PQfreemem = notify;
jbe@412 491 // do Lua operations:
jbe@397 492 lua_pushnil(L);
jbe@393 493 lua_pushstring(L, notify->relname);
jbe@393 494 lua_pushstring(L, notify->extra);
jbe@393 495 lua_pushinteger(L, notify->be_pid);
jbe@412 496 // free memory allocated by PQnotifies:
jbe@393 497 PQfreemem(notify);
jbe@412 498 // avoid double call of PQfreemem later:
jbe@412 499 conn->todo_PQfreemem = NULL;
jbe@397 500 return 4;
jbe@393 501 }
jbe@393 502 }
jbe@393 503 if (infinite) {
jbe@393 504 select(fd+1, &fds, NULL, NULL, NULL);
jbe@393 505 } else if (nonblock) {
jbe@393 506 break;
jbe@393 507 } else {
jbe@393 508 struct timespec tp;
jbe@393 509 struct timeval timeout = { 0, };
jbe@393 510 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@393 511 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 512 }
jbe@393 513 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
jbe@393 514 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
jbe@393 515 if (tp.tv_nsec < 0) {
jbe@393 516 tp.tv_sec -= 1;
jbe@393 517 tp.tv_nsec += 1000000000;
jbe@393 518 }
jbe@393 519 timeout.tv_sec = tp.tv_sec;
jbe@393 520 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
jbe@393 521 if (
jbe@393 522 timeout.tv_sec < 0 ||
jbe@393 523 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
jbe@393 524 ) break;
jbe@393 525 select(fd+1, &fds, NULL, NULL, &timeout);
jbe@393 526 }
jbe@393 527 }
jbe@397 528 lua_pushnil(L);
jbe@397 529 lua_pushnil(L);
jbe@393 530 return 2;
jbe@393 531 }
jbe@393 532
jbe@23 533 // method "create_list" of database handles:
jbe/bsw@0 534 static int mondelefant_conn_create_list(lua_State *L) {
jbe@23 535 // ensure that first argument is a database connection:
jbe/bsw@0 536 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 537 // if no second argument is given, use an empty table:
jbe@397 538 if (lua_isnoneornil(L, 2)) {
jbe@397 539 lua_settop(L, 1);
jbe@397 540 lua_newtable(L); // 2
jbe@397 541 } else {
jbe@397 542 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 543 lua_settop(L, 2);
jbe/bsw@0 544 }
jbe@23 545 // set meta-table for database result lists/objects:
jbe@406 546 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 547 // set "_connection" attribute to self:
jbe/bsw@0 548 lua_pushvalue(L, 1); // 3
jbe/bsw@0 549 lua_setfield(L, 2, "_connection");
jbe@23 550 // set "_type" attribute to string "list":
jbe/bsw@0 551 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 552 lua_setfield(L, 2, "_type");
jbe@23 553 // return created database result list:
jbe/bsw@0 554 return 1;
jbe/bsw@0 555 }
jbe/bsw@0 556
jbe@23 557 // method "create_object" of database handles:
jbe/bsw@0 558 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 559 // ensure that first argument is a database connection:
jbe/bsw@0 560 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@23 561 // if no second argument is given, use an empty table:
jbe@397 562 if (lua_isnoneornil(L, 2)) {
jbe@397 563 lua_settop(L, 1);
jbe@397 564 lua_newtable(L); // 2
jbe@397 565 } else {
jbe@397 566 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 567 lua_settop(L, 2);
jbe/bsw@0 568 }
jbe@397 569 // set meta-table for database result lists/objects:
jbe@406 570 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 571 // set "_connection" attribute to self:
jbe/bsw@0 572 lua_pushvalue(L, 1); // 3
jbe/bsw@0 573 lua_setfield(L, 2, "_connection");
jbe@23 574 // set "_type" attribute to string "object":
jbe/bsw@0 575 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 576 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@23 577 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 578 lua_newtable(L); // 3
jbe/bsw@0 579 lua_setfield(L, 2, "_data");
jbe/bsw@0 580 lua_newtable(L); // 3
jbe/bsw@0 581 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 582 lua_newtable(L); // 3
jbe/bsw@0 583 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@416 584 // create column proxy (field "columns" in result object):
jbe@416 585 lua_newtable(L); // 3
jbe@416 586 luaL_setmetatable(L, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 587 lua_pushvalue(L, 2); // 4
jbe@416 588 lua_rawsetp(L, 3, MONDELEFANT_COLUMNS_RESULT_LUKEY);
jbe@416 589 lua_setfield(L, 2, "columns");
jbe@416 590 // return created database result object (from stack position 2):
jbe/bsw@0 591 return 1;
jbe/bsw@0 592 }
jbe/bsw@0 593
jbe@23 594 // method "quote_string" of database handles:
jbe/bsw@0 595 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 596 mondelefant_conn_t *conn;
jbe/bsw@0 597 const char *input;
jbe/bsw@0 598 size_t input_len;
jbe@407 599 luaL_Buffer buf;
jbe/bsw@0 600 char *output;
jbe/bsw@0 601 size_t output_len;
jbe@407 602 // get database connection object:
jbe/bsw@0 603 conn = mondelefant_get_conn(L, 1);
jbe@23 604 // get second argument, which must be a string:
jbe/bsw@0 605 input = luaL_checklstring(L, 2, &input_len);
jbe@23 606 // throw error, if string is too long:
jbe/bsw@0 607 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 608 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 609 }
jbe@23 610 // allocate memory for quoted string:
jbe@407 611 output = luaL_buffinitsize(L, &buf, (2 * input_len + 3) * sizeof(char));
jbe@23 612 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 613 // single quotes:
jbe/bsw@0 614 output[0] = '\'';
jbe/bsw@0 615 output_len = PQescapeStringConn(
jbe/bsw@0 616 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 617 );
jbe/bsw@0 618 output[output_len + 1] = '\'';
jbe/bsw@0 619 output[output_len + 2] = 0;
jbe@23 620 // create Lua string:
jbe@407 621 luaL_addsize(&buf, output_len + 2);
jbe@23 622 // return Lua string:
jbe/bsw@0 623 return 1;
jbe/bsw@0 624 }
jbe/bsw@0 625
jbe@23 626 // method "quote_binary" of database handles:
jbe/bsw@0 627 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 628 mondelefant_conn_t *conn;
jbe/bsw@0 629 const char *input;
jbe/bsw@0 630 size_t input_len;
jbe/bsw@0 631 char *output;
jbe/bsw@0 632 size_t output_len;
jbe/bsw@0 633 luaL_Buffer buf;
jbe@407 634 // get database connection object:
jbe/bsw@0 635 conn = mondelefant_get_conn(L, 1);
jbe@23 636 // get second argument, which must be a string:
jbe/bsw@0 637 input = luaL_checklstring(L, 2, &input_len);
jbe@408 638 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 639 if (conn->todo_PQfreemem) {
jbe@410 640 PQfreemem(conn->todo_PQfreemem);
jbe@410 641 conn->todo_PQfreemem = NULL;
jbe@410 642 }
jbe@23 643 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 644 output = (char *)PQescapeByteaConn(
jbe/bsw@0 645 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 646 );
jbe/bsw@0 647 if (!output) {
jbe@408 648 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@408 649 output = (char *)PQescapeByteaConn(
jbe@408 650 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe@408 651 );
jbe@408 652 if (!output) {
jbe@408 653 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe@408 654 }
jbe/bsw@0 655 }
jbe@412 656 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@408 657 conn->todo_PQfreemem = output;
jbe@23 658 // create Lua string enclosed by single quotes:
jbe/bsw@0 659 luaL_buffinit(L, &buf);
jbe/bsw@0 660 luaL_addchar(&buf, '\'');
jbe/bsw@0 661 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 662 luaL_addchar(&buf, '\'');
jbe/bsw@0 663 luaL_pushresult(&buf);
jbe@23 664 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 665 PQfreemem(output);
jbe@408 666 // avoid double call of PQfreemem later:
jbe@408 667 conn->todo_PQfreemem = NULL;
jbe@23 668 // return Lua string:
jbe/bsw@0 669 return 1;
jbe/bsw@0 670 }
jbe/bsw@0 671
jbe@23 672 // method "assemble_command" of database handles:
jbe/bsw@0 673 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 674 mondelefant_conn_t *conn;
jbe/bsw@0 675 int paramidx = 2;
jbe/bsw@0 676 const char *template;
jbe/bsw@0 677 size_t template_pos = 0;
jbe/bsw@0 678 luaL_Buffer buf;
jbe@407 679 // get database connection object:
jbe/bsw@0 680 conn = mondelefant_get_conn(L, 1);
jbe@23 681 // if second argument is a string, return this string:
jbe@397 682 if (lua_type(L, 2) == LUA_TSTRING) {
jbe@397 683 lua_settop(L, 2);
jbe/bsw@0 684 return 1;
jbe/bsw@0 685 }
jbe@23 686 // if second argument has __tostring meta-method,
jbe@23 687 // then use this method and return its result:
jbe/bsw@0 688 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 689 // otherwise, require that second argument is a table:
jbe/bsw@0 690 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 691 // set stack top:
jbe@397 692 lua_settop(L, 2);
jbe@23 693 // get first element of table, which must be a string:
jbe/bsw@0 694 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 695 luaL_argcheck(L,
jbe/bsw@0 696 lua_isstring(L, 3),
jbe/bsw@0 697 2,
jbe/bsw@0 698 "First entry of SQL command structure is not a string."
jbe/bsw@0 699 );
jbe/bsw@0 700 template = lua_tostring(L, 3);
jbe@23 701 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 702 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 703 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 704 // reserve space on Lua stack:
jbe/bsw@0 705 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 706 lua_pushnil(L); // free space at stack position 6
jbe@23 707 // initialize Lua buffer for result string:
jbe/bsw@0 708 luaL_buffinit(L, &buf);
jbe@23 709 // fill buffer in loop:
jbe/bsw@0 710 while (1) {
jbe@23 711 // variable declaration:
jbe/bsw@0 712 char c;
jbe@23 713 // get next character:
jbe/bsw@0 714 c = template[template_pos++];
jbe@23 715 // break, when character is NULL byte:
jbe/bsw@0 716 if (!c) break;
jbe@23 717 // question-mark and dollar-sign are special characters:
jbe@23 718 if (c == '?' || c == '$') { // special character found
jbe@23 719 // check, if same character follows:
jbe@23 720 if (template[template_pos] == c) { // special character is escaped
jbe@23 721 // consume two characters of input and add one character to buffer:
jbe/bsw@0 722 template_pos++;
jbe/bsw@0 723 luaL_addchar(&buf, c);
jbe@23 724 } else { // special character is not escaped
jbe/bsw@0 725 luaL_Buffer keybuf;
jbe/bsw@0 726 int subcmd;
jbe@23 727 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 728 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 729 subcmd = (c == '$');
jbe@23 730 // read any number of alpha numeric chars or underscores
jbe@23 731 // and store them on Lua stack:
jbe/bsw@0 732 luaL_buffinit(L, &keybuf);
jbe/bsw@0 733 while (1) {
jbe/bsw@0 734 c = template[template_pos];
jbe/bsw@0 735 if (
jbe/bsw@0 736 (c < 'A' || c > 'Z') &&
jbe/bsw@0 737 (c < 'a' || c > 'z') &&
jbe/bsw@0 738 (c < '0' || c > '9') &&
jbe/bsw@0 739 (c != '_')
jbe/bsw@0 740 ) break;
jbe/bsw@0 741 luaL_addchar(&keybuf, c);
jbe/bsw@0 742 template_pos++;
jbe/bsw@0 743 }
jbe/bsw@0 744 luaL_pushresult(&keybuf);
jbe@23 745 // check, if any characters matched:
jbe@64 746 if (lua_rawlen(L, -1)) {
jbe@23 747 // if any alpha numeric chars or underscores were found,
jbe@23 748 // push them on stack as a Lua string and use them to lookup
jbe@23 749 // value from second argument:
jbe/bsw@0 750 lua_pushvalue(L, -1); // save key on stack
jbe@23 751 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 752 } else {
jbe@23 753 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 754 lua_pop(L, 1);
jbe/bsw@0 755 lua_pushnil(L); // put nil on key position
jbe@23 756 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 757 }
jbe@23 758 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 759 // branch according to type of special character ("?" or "$"):
jbe@23 760 if (subcmd) { // dollar-sign
jbe/bsw@0 761 size_t i;
jbe/bsw@0 762 size_t count;
jbe@23 763 // store fetched value (which is supposed to be sub-structure)
jbe@23 764 // on Lua stack position 5 and drop key:
jbe@23 765 lua_replace(L, 5);
jbe@23 766 lua_pop(L, 1);
jbe@23 767 // Lua stack contains: ..., <buffer>
jbe@23 768 // check, if fetched value is really a sub-structure:
jbe/bsw@0 769 luaL_argcheck(L,
jbe/bsw@0 770 !lua_isnil(L, 5),
jbe/bsw@0 771 2,
jbe/bsw@0 772 "SQL sub-structure not found."
jbe/bsw@0 773 );
jbe/bsw@0 774 luaL_argcheck(L,
jbe/bsw@0 775 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 776 2,
jbe/bsw@0 777 "SQL sub-structure must be a table."
jbe/bsw@0 778 );
jbe@23 779 // Lua stack contains: ..., <buffer>
jbe@23 780 // get value of "sep" attribute of sub-structure,
jbe@23 781 // and place it on Lua stack position 6:
jbe/bsw@0 782 lua_getfield(L, 5, "sep");
jbe@23 783 lua_replace(L, 6);
jbe@23 784 // if seperator is nil, then use ", " as default,
jbe@23 785 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 786 if (lua_isnil(L, 6)) {
jbe/bsw@0 787 lua_pushstring(L, ", ");
jbe/bsw@0 788 lua_replace(L, 6);
jbe/bsw@0 789 } else {
jbe/bsw@0 790 luaL_argcheck(L,
jbe/bsw@0 791 lua_isstring(L, 6),
jbe/bsw@0 792 2,
jbe/bsw@0 793 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 794 );
jbe/bsw@0 795 }
jbe@23 796 // iterate over items of sub-structure:
jbe@64 797 count = lua_rawlen(L, 5);
jbe/bsw@0 798 for (i = 0; i < count; i++) {
jbe@23 799 // add seperator, unless this is the first run:
jbe/bsw@0 800 if (i) {
jbe/bsw@0 801 lua_pushvalue(L, 6);
jbe/bsw@0 802 luaL_addvalue(&buf);
jbe/bsw@0 803 }
jbe@23 804 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 805 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 806 lua_pushvalue(L, 1);
jbe/bsw@0 807 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 808 lua_call(L, 2, 1);
jbe/bsw@0 809 luaL_addvalue(&buf);
jbe/bsw@0 810 }
jbe@23 811 } else { // question-mark
jbe/bsw@0 812 if (lua_toboolean(L, 4)) {
jbe@23 813 // call input_converter with connection handle, raw-value and
jbe@23 814 // an info-table which contains a "field_name" entry with the
jbe@23 815 // used key:
jbe/bsw@0 816 lua_pushvalue(L, 4);
jbe/bsw@0 817 lua_pushvalue(L, 1);
jbe/bsw@0 818 lua_pushvalue(L, -3);
jbe/bsw@0 819 lua_newtable(L);
jbe/bsw@0 820 lua_pushvalue(L, -6);
jbe/bsw@0 821 lua_setfield(L, -2, "field_name");
jbe/bsw@0 822 lua_call(L, 3, 1);
jbe@23 823 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 824 // remove key and raw-value:
jbe/bsw@0 825 lua_remove(L, -2);
jbe/bsw@0 826 lua_remove(L, -2);
jbe@23 827 // Lua stack contains: ..., <buffer>, final-value
jbe@23 828 // throw error, if final-value is not a string:
jbe/bsw@0 829 if (!lua_isstring(L, -1)) {
jbe/bsw@0 830 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 831 }
jbe/bsw@0 832 } else {
jbe@23 833 // remove key from stack:
jbe/bsw@0 834 lua_remove(L, -2);
jbe@23 835 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 836 // branch according to type of value:
jbe@408 837 // NOTE: Lua automatically converts numbers to strings
jbe@23 838 if (lua_isnil(L, -1)) { // value is nil
jbe@23 839 // push string "NULL" to stack:
jbe/bsw@0 840 lua_pushliteral(L, "NULL");
jbe@23 841 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 842 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 843 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 844 } else if (lua_isstring(L, -1)) { // value is string or number
jbe@408 845 // push output of "quote_string" method of database connection
jbe@408 846 // to stack:
jbe/bsw@0 847 lua_tostring(L, -1);
jbe/bsw@0 848 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 849 lua_pushvalue(L, 1);
jbe/bsw@0 850 lua_pushvalue(L, -3);
jbe/bsw@0 851 lua_call(L, 2, 1);
jbe@23 852 } else { // value is of other type
jbe@23 853 // throw error:
jbe/bsw@0 854 return luaL_error(L,
jbe/bsw@0 855 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 856 "or missing input_converter."
jbe/bsw@0 857 );
jbe/bsw@0 858 }
jbe@23 859 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 860 // remove raw-value:
jbe/bsw@0 861 lua_remove(L, -2);
jbe@23 862 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 863 }
jbe@23 864 // append final-value to buffer:
jbe/bsw@0 865 luaL_addvalue(&buf);
jbe/bsw@0 866 }
jbe/bsw@0 867 }
jbe@23 868 } else { // character is not special
jbe@23 869 // just copy character:
jbe/bsw@0 870 luaL_addchar(&buf, c);
jbe/bsw@0 871 }
jbe/bsw@0 872 }
jbe@23 873 // return string in buffer:
jbe/bsw@0 874 luaL_pushresult(&buf);
jbe/bsw@0 875 return 1;
jbe/bsw@0 876 }
jbe/bsw@0 877
jbe@23 878 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 879 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 880 // max number of columns in a database result:
jbe/bsw@0 881 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 882 // enum values for 'modes' array in C-function below:
jbe/bsw@0 883 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 884 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 885 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 886
jbe@23 887 // method "try_query" of database handles:
jbe/bsw@0 888 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 889 mondelefant_conn_t *conn;
jbe/bsw@0 890 int command_count;
jbe/bsw@0 891 int command_idx;
jbe/bsw@0 892 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 893 luaL_Buffer buf;
jbe/bsw@0 894 int sent_success;
jbe/bsw@0 895 PGresult *res;
jbe/bsw@0 896 int rows, cols, row, col;
jbe@407 897 // get database connection object:
jbe/bsw@0 898 conn = mondelefant_get_conn(L, 1);
jbe@23 899 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 900 command_count = lua_gettop(L) / 2;
jbe@23 901 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 902 lua_pushnil(L);
jbe@23 903 // throw error, if number of commands is too high:
jbe/bsw@0 904 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 905 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 906 }
jbe@23 907 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 908 luaL_buffinit(L, &buf);
jbe/bsw@0 909 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 910 int mode;
jbe/bsw@0 911 int mode_idx; // stack index of mode string
jbe/bsw@0 912 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 913 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 914 lua_pushvalue(L, 1);
jbe/bsw@0 915 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 916 lua_call(L, 2, 1);
jbe/bsw@0 917 luaL_addvalue(&buf);
jbe/bsw@0 918 luaL_addchar(&buf, ';');
jbe/bsw@0 919 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 920 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 921 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 922 } else {
jbe/bsw@0 923 const char *modestr;
jbe/bsw@0 924 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 925 if (!strcmp(modestr, "list")) {
jbe/bsw@0 926 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 927 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 928 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 929 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 930 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 931 } else {
jbe@397 932 return luaL_argerror(L, mode_idx, "unknown query mode");
jbe/bsw@0 933 }
jbe/bsw@0 934 }
jbe/bsw@0 935 modes[command_idx] = mode;
jbe/bsw@0 936 }
jbe/bsw@0 937 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 938 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 939 // call sql_tracer, if set:
jbe/bsw@0 940 lua_settop(L, 2);
jbe/bsw@0 941 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 942 if (lua_toboolean(L, 3)) {
jbe/bsw@0 943 lua_pushvalue(L, 1); // 4
jbe/bsw@0 944 lua_pushvalue(L, 2); // 5
jbe/bsw@0 945 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 946 }
jbe@23 947 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 948 // position 3.
jbe@23 949 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 950 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 951 // create preliminary result table:
jbe/bsw@0 952 lua_newtable(L); // results in table at stack position 4
jbe@23 953 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 954 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 955 int mode;
jbe/bsw@0 956 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 957 ExecStatusType pgstatus;
jbe@23 958 // fetch mode which was given for the command:
jbe/bsw@0 959 mode = modes[command_idx];
jbe@23 960 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 961 if (sent_success) {
jbe@408 962 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 963 if (conn->todo_PQclear) {
jbe@410 964 PQclear(conn->todo_PQclear);
jbe@410 965 conn->todo_PQclear = NULL;
jbe@410 966 }
jbe@23 967 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 968 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 969 res = PQgetResult(conn->pgconn);
jbe/bsw@0 970 if (command_idx >= command_count && !res) break;
jbe/bsw@0 971 if (res) {
jbe/bsw@0 972 pgstatus = PQresultStatus(res);
jbe/bsw@0 973 rows = PQntuples(res);
jbe/bsw@0 974 cols = PQnfields(res);
jbe@412 975 // ensure call of PQclear in case of Lua errors:
jbe@408 976 conn->todo_PQclear = res;
jbe/bsw@0 977 }
jbe/bsw@0 978 }
jbe@23 979 // handle errors:
jbe/bsw@0 980 if (
jbe/bsw@0 981 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 982 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 983 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 984 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 985 ) {
jbe/bsw@0 986 const char *command;
jbe/bsw@0 987 command = lua_tostring(L, 2);
jbe/bsw@0 988 lua_newtable(L); // 5
jbe@406 989 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 990 lua_pushvalue(L, 1);
jbe/bsw@0 991 lua_setfield(L, 5, "connection");
jbe/bsw@0 992 lua_pushvalue(L, 2);
jbe/bsw@0 993 lua_setfield(L, 5, "sql_command");
jbe@397 994 if (!sent_success) {
jbe@397 995 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 996 lua_setfield(L, 5, "code");
jbe@397 997 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe/bsw@0 998 lua_setfield(L, 5, "message");
jbe/bsw@0 999 } else {
jbe@397 1000 lua_pushinteger(L, command_idx + 1);
jbe@397 1001 lua_setfield(L, 5, "command_number");
jbe@397 1002 if (!res) {
jbe@397 1003 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe@397 1004 lua_setfield(L, 5, "code");
jbe@397 1005 lua_pushliteral(L, "Received too few database result sets.");
jbe@397 1006 lua_setfield(L, 5, "message");
jbe@397 1007 } else if (command_idx >= command_count) {
jbe@397 1008 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe@397 1009 lua_setfield(L, 5, "code");
jbe@397 1010 lua_pushliteral(L, "Received too many database result sets.");
jbe@397 1011 lua_setfield(L, 5, "message");
jbe@397 1012 } else if (
jbe@397 1013 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe@397 1014 ) {
jbe@397 1015 const char *sqlstate;
jbe@397 1016 const char *errmsg;
jbe@397 1017 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe@397 1018 lua_setfield(L, 5, "pg_severity");
jbe@397 1019 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe@397 1020 if (sqlstate) {
jbe@397 1021 lua_pushstring(L, sqlstate);
jbe@397 1022 lua_setfield(L, 5, "pg_sqlstate");
jbe@397 1023 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe@397 1024 lua_setfield(L, 5, "code");
jbe@397 1025 } else {
jbe@397 1026 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe@397 1027 lua_setfield(L, 5, "code");
jbe@397 1028 }
jbe@397 1029 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe@397 1030 if (errmsg) {
jbe@397 1031 mondelefant_push_first_line(L, errmsg);
jbe@397 1032 lua_setfield(L, 5, "message");
jbe@397 1033 lua_pushstring(L, errmsg);
jbe@397 1034 lua_setfield(L, 5, "pg_message_primary");
jbe@397 1035 } else {
jbe@397 1036 lua_pushliteral(L,
jbe@397 1037 "Error while fetching result, but no error message given."
jbe@397 1038 );
jbe@397 1039 lua_setfield(L, 5, "message");
jbe@397 1040 }
jbe@397 1041 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe@397 1042 lua_setfield(L, 5, "pg_message_detail");
jbe@397 1043 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe@397 1044 lua_setfield(L, 5, "pg_message_hint");
jbe@397 1045 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe@397 1046 // byte offsets, as Lua 5.2 is not Unicode aware.
jbe@397 1047 {
jbe@397 1048 char *tmp;
jbe@397 1049 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe@397 1050 if (tmp) {
jbe@397 1051 int pos;
jbe@397 1052 pos = atoi(tmp) - 1;
jbe@397 1053 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1054 pos = utf8_position_to_byte(command, pos);
jbe@397 1055 }
jbe@397 1056 lua_pushinteger(L, pos + 1);
jbe@397 1057 lua_setfield(L, 5, "position");
jbe@397 1058 }
jbe@397 1059 }
jbe@397 1060 {
jbe@397 1061 const char *internal_query;
jbe@397 1062 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe@397 1063 lua_pushstring(L, internal_query);
jbe@397 1064 lua_setfield(L, 5, "pg_internal_query");
jbe@397 1065 char *tmp;
jbe@397 1066 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe@397 1067 if (tmp) {
jbe@397 1068 int pos;
jbe@397 1069 pos = atoi(tmp) - 1;
jbe@397 1070 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1071 pos = utf8_position_to_byte(internal_query, pos);
jbe@397 1072 }
jbe@397 1073 lua_pushinteger(L, pos + 1);
jbe@397 1074 lua_setfield(L, 5, "pg_internal_position");
jbe@397 1075 }
jbe@397 1076 }
jbe@397 1077 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe@397 1078 lua_setfield(L, 5, "pg_context");
jbe@397 1079 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe@397 1080 lua_setfield(L, 5, "pg_source_file");
jbe@397 1081 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe@397 1082 lua_setfield(L, 5, "pg_source_line");
jbe@397 1083 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe@397 1084 lua_setfield(L, 5, "pg_source_function");
jbe@397 1085 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe@397 1086 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe@397 1087 lua_setfield(L, 5, "code");
jbe@397 1088 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe@397 1089 lua_setfield(L, 5, "message");
jbe@397 1090 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe@397 1091 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe@397 1092 lua_setfield(L, 5, "code");
jbe@397 1093 lua_pushliteral(L, "Got more than one result row.");
jbe@397 1094 lua_setfield(L, 5, "message");
jbe@397 1095 } else {
jbe@397 1096 // should not happen
jbe@397 1097 abort();
jbe@397 1098 }
jbe@397 1099 if (res) {
jbe@397 1100 PQclear(res);
jbe@397 1101 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe@408 1102 // avoid double call of PQclear later:
jbe@408 1103 conn->todo_PQclear = NULL;
jbe@397 1104 }
jbe/bsw@0 1105 }
jbe/bsw@0 1106 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1107 lua_pushvalue(L, 3);
jbe/bsw@0 1108 lua_pushvalue(L, 5);
jbe/bsw@0 1109 lua_call(L, 1, 0);
jbe/bsw@0 1110 }
jbe/bsw@0 1111 return 1;
jbe/bsw@0 1112 }
jbe@23 1113 // call "create_list" or "create_object" method of database handle,
jbe@23 1114 // result will be at stack position 5:
jbe/bsw@0 1115 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1116 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1117 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1118 lua_call(L, 1, 1); // 5
jbe/bsw@0 1119 } else {
jbe/bsw@0 1120 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1121 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1122 lua_call(L, 1, 1); // 5
jbe/bsw@0 1123 }
jbe@23 1124 // set "_column_info":
jbe@23 1125 lua_newtable(L); // 6
jbe/bsw@0 1126 for (col = 0; col < cols; col++) {
jbe/bsw@0 1127 lua_newtable(L); // 7
jbe@380 1128 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1129 lua_pushvalue(L, 8); // 9
jbe@380 1130 lua_pushvalue(L, 7); // 10
jbe@380 1131 lua_rawset(L, 6);
jbe/bsw@0 1132 lua_setfield(L, 7, "field_name");
jbe@380 1133 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1134 {
jbe/bsw@0 1135 Oid tmp;
jbe/bsw@0 1136 tmp = PQftable(res, col);
jbe/bsw@0 1137 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1138 else lua_pushinteger(L, tmp);
jbe/bsw@0 1139 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1140 }
jbe/bsw@0 1141 {
jbe/bsw@0 1142 int tmp;
jbe/bsw@0 1143 tmp = PQftablecol(res, col);
jbe/bsw@0 1144 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1145 else lua_pushinteger(L, tmp);
jbe/bsw@0 1146 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1147 }
jbe/bsw@0 1148 {
jbe/bsw@0 1149 Oid tmp;
jbe/bsw@0 1150 tmp = PQftype(res, col);
jbe/bsw@0 1151 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1152 lua_pushinteger(L, tmp);
jbe/bsw@0 1153 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1154 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1155 lua_setfield(L, 7, "type");
jbe/bsw@0 1156 }
jbe/bsw@0 1157 {
jbe/bsw@0 1158 int tmp;
jbe/bsw@0 1159 tmp = PQfmod(res, col);
jbe/bsw@0 1160 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1161 else lua_pushinteger(L, tmp);
jbe/bsw@0 1162 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1163 }
jbe/bsw@0 1164 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1165 }
jbe@23 1166 lua_setfield(L, 5, "_column_info");
jbe@23 1167 // set "_rows_affected":
jbe/bsw@0 1168 {
jbe/bsw@0 1169 char *tmp;
jbe/bsw@0 1170 tmp = PQcmdTuples(res);
jbe/bsw@0 1171 if (tmp[0]) {
jbe/bsw@0 1172 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1173 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1174 }
jbe/bsw@0 1175 }
jbe@23 1176 // set "_oid":
jbe/bsw@0 1177 {
jbe/bsw@0 1178 Oid tmp;
jbe/bsw@0 1179 tmp = PQoidValue(res);
jbe/bsw@0 1180 if (tmp != InvalidOid) {
jbe/bsw@0 1181 lua_pushinteger(L, tmp);
jbe/bsw@0 1182 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1183 }
jbe/bsw@0 1184 }
jbe@23 1185 // copy data as strings or nil, while performing binary unescaping
jbe@23 1186 // automatically:
jbe/bsw@0 1187 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1188 for (row = 0; row < rows; row++) {
jbe/bsw@0 1189 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1190 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1191 lua_call(L, 1, 1); // 6
jbe/bsw@0 1192 for (col = 0; col < cols; col++) {
jbe/bsw@0 1193 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1194 lua_pushnil(L);
jbe/bsw@0 1195 } else if (binary[col]) {
jbe/bsw@0 1196 size_t binlen;
jbe/bsw@0 1197 char *binval;
jbe@412 1198 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1199 if (conn->todo_PQfreemem) {
jbe@412 1200 PQfreemem(conn->todo_PQfreemem);
jbe@412 1201 conn->todo_PQfreemem = NULL;
jbe@412 1202 }
jbe@412 1203 // Unescape binary data:
jbe/bsw@0 1204 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1205 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1206 );
jbe/bsw@0 1207 if (!binval) {
jbe/bsw@0 1208 return luaL_error(L,
jbe/bsw@0 1209 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1210 );
jbe/bsw@0 1211 }
jbe@412 1212 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1213 conn->todo_PQfreemem = binval;
jbe@412 1214 // create Lua string:
jbe/bsw@0 1215 lua_pushlstring(L, binval, binlen);
jbe@412 1216 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1217 PQfreemem(binval);
jbe@412 1218 // avoid double call of PQfreemem later:
jbe@412 1219 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1220 } else {
jbe/bsw@0 1221 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1222 }
jbe/bsw@0 1223 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1224 }
jbe/bsw@0 1225 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1226 }
jbe/bsw@0 1227 } else if (rows == 1) {
jbe/bsw@0 1228 for (col = 0; col < cols; col++) {
jbe/bsw@0 1229 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1230 lua_pushnil(L);
jbe/bsw@0 1231 } else if (binary[col]) {
jbe/bsw@0 1232 size_t binlen;
jbe/bsw@0 1233 char *binval;
jbe@412 1234 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1235 if (conn->todo_PQfreemem) {
jbe@412 1236 PQfreemem(conn->todo_PQfreemem);
jbe@412 1237 conn->todo_PQfreemem = NULL;
jbe@412 1238 }
jbe@412 1239 // Unescape binary data:
jbe/bsw@0 1240 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1241 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1242 );
jbe/bsw@0 1243 if (!binval) {
jbe/bsw@0 1244 return luaL_error(L,
jbe/bsw@0 1245 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1246 );
jbe/bsw@0 1247 }
jbe@412 1248 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1249 conn->todo_PQfreemem = binval;
jbe@412 1250 // create Lua string:
jbe/bsw@0 1251 lua_pushlstring(L, binval, binlen);
jbe@412 1252 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1253 PQfreemem(binval);
jbe@412 1254 // avoid double call of PQfreemem later:
jbe@412 1255 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1256 } else {
jbe/bsw@0 1257 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1258 }
jbe/bsw@0 1259 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1260 }
jbe/bsw@0 1261 } else {
jbe/bsw@0 1262 // no row in optrow mode
jbe/bsw@0 1263 lua_pop(L, 1);
jbe/bsw@0 1264 lua_pushnil(L);
jbe/bsw@0 1265 }
jbe@23 1266 // save result in result list:
jbe/bsw@0 1267 lua_rawseti(L, 4, command_idx+1);
jbe@23 1268 // extra assertion:
jbe/bsw@0 1269 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1270 // free memory acquired by libpq:
jbe/bsw@0 1271 PQclear(res);
jbe@408 1272 // avoid double call of PQclear later:
jbe@408 1273 conn->todo_PQclear = NULL;
jbe/bsw@0 1274 }
jbe/bsw@0 1275 // trace callback at stack position 3
jbe/bsw@0 1276 // result at stack position 4 (top of stack)
jbe@23 1277 // if a trace callback is existent, then call:
jbe/bsw@0 1278 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1279 lua_pushvalue(L, 3);
jbe/bsw@0 1280 lua_call(L, 0, 0);
jbe/bsw@0 1281 }
jbe@23 1282 // put result at stack position 3:
jbe@23 1283 lua_replace(L, 3);
jbe@23 1284 // get output converter to stack position 4:
jbe@23 1285 lua_getfield(L, 1, "output_converter");
jbe@374 1286 // get mutability state saver to stack position 5:
jbe@375 1287 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1288 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1289 lua_replace(L, -2);
jbe@23 1290 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1291 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1292 int mode;
jbe/bsw@0 1293 mode = modes[command_idx];
jbe@374 1294 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1295 if (lua_toboolean(L, 6)) {
jbe@374 1296 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@374 1297 cols = lua_rawlen(L, 7);
jbe/bsw@0 1298 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@374 1299 rows = lua_rawlen(L, 6);
jbe/bsw@0 1300 for (row = 0; row < rows; row++) {
jbe@374 1301 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1302 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1303 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1304 for (col = 0; col < cols; col++) {
jbe@375 1305 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1306 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1307 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1308 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1309 lua_pushvalue(L, 1); // connection
jbe@374 1310 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1311 lua_pushvalue(L, 11); // this column info
jbe@375 1312 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1313 } else {
jbe@375 1314 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1315 }
jbe@375 1316 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1317 lua_pushvalue(L, 12); // copy of field name
jbe@375 1318 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1319 lua_pushvalue(L, 13); // copy of value
jbe@375 1320 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1321 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1322 }
jbe@375 1323 lua_pushvalue(L, 13); // 14
jbe@374 1324 lua_rawseti(L, 8, col+1);
jbe@374 1325 lua_rawset(L, 9);
jbe@399 1326 lua_settop(L, 10);
jbe/bsw@0 1327 }
jbe@374 1328 lua_settop(L, 7);
jbe/bsw@0 1329 }
jbe/bsw@0 1330 } else {
jbe@374 1331 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1332 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1333 for (col = 0; col < cols; col++) {
jbe@375 1334 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1335 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1336 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1337 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1338 lua_pushvalue(L, 1); // connection
jbe@374 1339 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1340 lua_pushvalue(L, 10); // this column info
jbe@375 1341 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1342 } else {
jbe@375 1343 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1344 }
jbe@375 1345 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1346 lua_pushvalue(L, 11); // copy of field name
jbe@375 1347 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1348 lua_pushvalue(L, 12); // copy of value
jbe@375 1349 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1350 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1351 }
jbe@375 1352 lua_pushvalue(L, 12); // 13
jbe@374 1353 lua_rawseti(L, 6, col+1);
jbe@374 1354 lua_rawset(L, 8);
jbe@399 1355 lua_settop(L, 9);
jbe/bsw@0 1356 }
jbe/bsw@0 1357 }
jbe/bsw@0 1358 }
jbe@374 1359 lua_settop(L, 5);
jbe/bsw@0 1360 }
jbe@23 1361 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1362 lua_settop(L, 3);
jbe/bsw@0 1363 lua_pushnil(L);
jbe/bsw@0 1364 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1365 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1366 }
jbe/bsw@0 1367 return command_count+1;
jbe/bsw@0 1368 }
jbe/bsw@0 1369
jbe@397 1370 // method "is_kind_of" of error objects:
jbe@397 1371 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe@397 1372 const char *errclass;
jbe@397 1373 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1374 errclass = luaL_checkstring(L, 2);
jbe@397 1375 lua_settop(L, 2);
jbe@397 1376 lua_getfield(L, 1, "code"); // 3
jbe@397 1377 luaL_argcheck(L,
jbe@397 1378 lua_type(L, 3) == LUA_TSTRING,
jbe@397 1379 1,
jbe@397 1380 "field 'code' of error object is not a string"
jbe@397 1381 );
jbe@397 1382 lua_pushboolean(L,
jbe@397 1383 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
jbe@397 1384 );
jbe@397 1385 return 1;
jbe@397 1386 }
jbe@397 1387
jbe@397 1388 // method "wait" of database handles:
jbe@397 1389 static int mondelefant_conn_wait(lua_State *L) {
jbe@397 1390 int argc;
jbe@397 1391 // count number of arguments:
jbe@397 1392 argc = lua_gettop(L);
jbe@397 1393 // insert "try_wait" function/method at stack position 1:
jbe@397 1394 lua_pushcfunction(L, mondelefant_conn_try_wait);
jbe@397 1395 lua_insert(L, 1);
jbe@397 1396 // call "try_wait" method:
jbe@397 1397 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@397 1398 // check, if error occurred:
jbe@397 1399 if (lua_toboolean(L, 1)) {
jbe@397 1400 // raise error
jbe/bsw@0 1401 lua_settop(L, 1);
jbe/bsw@0 1402 return lua_error(L);
jbe/bsw@0 1403 } else {
jbe@397 1404 // return everything but nil error object:
jbe@397 1405 return lua_gettop(L) - 1;
jbe/bsw@0 1406 }
jbe/bsw@0 1407 }
jbe/bsw@0 1408
jbe@23 1409 // method "query" of database handles:
jbe/bsw@0 1410 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1411 int argc;
jbe@23 1412 // count number of arguments:
jbe/bsw@0 1413 argc = lua_gettop(L);
jbe@23 1414 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1415 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1416 lua_insert(L, 1);
jbe@23 1417 // call "try_query" method:
jbe@23 1418 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1419 // check, if error occurred:
jbe@23 1420 if (lua_toboolean(L, 1)) {
jbe@397 1421 // raise error
jbe@397 1422 lua_settop(L, 1);
jbe@397 1423 return lua_error(L);
jbe/bsw@0 1424 } else {
jbe@23 1425 // return everything but nil error object:
jbe@23 1426 return lua_gettop(L) - 1;
jbe/bsw@0 1427 }
jbe/bsw@0 1428 }
jbe/bsw@0 1429
jbe@23 1430 // library function "set_class":
jbe/bsw@0 1431 static int mondelefant_set_class(lua_State *L) {
jbe@23 1432 // ensure that first argument is a database result list/object:
jbe/bsw@0 1433 lua_settop(L, 2);
jbe/bsw@0 1434 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1435 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1436 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@23 1437 // ensure that second argument is a database class (model):
jbe/bsw@0 1438 lua_settop(L, 2);
jbe/bsw@0 1439 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1440 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1441 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@23 1442 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1443 lua_settop(L, 2);
jbe/bsw@0 1444 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1445 lua_setfield(L, 1, "_class");
jbe@23 1446 // test, if database result is a list (and not a single object):
jbe/bsw@0 1447 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1448 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1449 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1450 int i;
jbe@23 1451 // set attribute "_class" of all elements to given class:
jbe@64 1452 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe/bsw@0 1453 lua_settop(L, 2);
jbe/bsw@0 1454 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1455 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1456 lua_setfield(L, 3, "_class");
jbe/bsw@0 1457 }
jbe/bsw@0 1458 }
jbe@23 1459 // return first argument:
jbe/bsw@0 1460 lua_settop(L, 1);
jbe/bsw@0 1461 return 1;
jbe/bsw@0 1462 }
jbe/bsw@0 1463
jbe@23 1464 // library function "new_class":
jbe/bsw@0 1465 static int mondelefant_new_class(lua_State *L) {
jbe@397 1466 // if no argument is given, use an empty table:
jbe@397 1467 if (lua_isnoneornil(L, 1)) {
jbe/bsw@0 1468 lua_settop(L, 0);
jbe/bsw@0 1469 lua_newtable(L); // 1
jbe@397 1470 } else {
jbe@397 1471 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1472 lua_settop(L, 1);
jbe/bsw@0 1473 }
jbe@23 1474 // set meta-table for database classes (models):
jbe@406 1475 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
jbe@23 1476 // check, if "prototype" attribute is not set:
jbe/bsw@0 1477 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1478 lua_rawget(L, 1); // 2
jbe/bsw@0 1479 if (!lua_toboolean(L, 2)) {
jbe@23 1480 // set "prototype" attribute to default prototype:
jbe/bsw@0 1481 lua_pushliteral(L, "prototype"); // 3
jbe@413 1482 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1483 lua_rawset(L, 1);
jbe/bsw@0 1484 }
jbe@23 1485 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1486 lua_settop(L, 1);
jbe/bsw@0 1487 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1488 lua_rawget(L, 1); // 2
jbe/bsw@0 1489 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1490 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1491 lua_newtable(L); // 4
jbe/bsw@0 1492 lua_rawset(L, 1);
jbe/bsw@0 1493 }
jbe@23 1494 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1495 lua_settop(L, 1);
jbe/bsw@0 1496 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1497 lua_rawget(L, 1); // 2
jbe/bsw@0 1498 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1499 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1500 lua_newtable(L); // 4
jbe/bsw@0 1501 lua_rawset(L, 1);
jbe/bsw@0 1502 }
jbe@23 1503 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1504 lua_settop(L, 1);
jbe/bsw@0 1505 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1506 lua_rawget(L, 1); // 2
jbe/bsw@0 1507 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1508 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1509 lua_newtable(L); // 4
jbe/bsw@0 1510 lua_rawset(L, 1);
jbe/bsw@0 1511 }
jbe@23 1512 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1513 lua_settop(L, 1);
jbe/bsw@0 1514 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1515 lua_rawget(L, 1); // 2
jbe/bsw@0 1516 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1517 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1518 lua_newtable(L); // 4
jbe/bsw@0 1519 lua_rawset(L, 1);
jbe/bsw@0 1520 }
jbe@23 1521 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1522 lua_settop(L, 1);
jbe/bsw@0 1523 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1524 lua_rawget(L, 1); // 2
jbe/bsw@0 1525 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1526 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1527 lua_newtable(L); // 4
jbe/bsw@0 1528 lua_rawset(L, 1);
jbe/bsw@0 1529 }
jbe@23 1530 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1531 lua_settop(L, 1);
jbe/bsw@0 1532 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1533 lua_rawget(L, 1); // 2
jbe/bsw@0 1534 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1535 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1536 lua_newtable(L); // 4
jbe/bsw@0 1537 lua_rawset(L, 1);
jbe/bsw@0 1538 }
jbe@23 1539 // return table:
jbe/bsw@0 1540 lua_settop(L, 1);
jbe/bsw@0 1541 return 1;
jbe/bsw@0 1542 }
jbe/bsw@0 1543
jbe@23 1544 // method "get_reference" of classes (models):
jbe/bsw@0 1545 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1546 lua_settop(L, 2);
jbe/bsw@0 1547 while (lua_toboolean(L, 1)) {
jbe@23 1548 // get "references" table:
jbe/bsw@0 1549 lua_getfield(L, 1, "references"); // 3
jbe@23 1550 // perform lookup:
jbe/bsw@0 1551 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1552 lua_gettable(L, 3); // 4
jbe@23 1553 // return result, if lookup was successful:
jbe/bsw@0 1554 if (!lua_isnil(L, 4)) return 1;
jbe@23 1555 // replace current table by its prototype:
jbe/bsw@0 1556 lua_settop(L, 2);
jbe/bsw@0 1557 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1558 lua_rawget(L, 1); // 3
jbe/bsw@0 1559 lua_replace(L, 1);
jbe/bsw@0 1560 }
jbe@23 1561 // return nothing:
jbe/bsw@0 1562 return 0;
jbe/bsw@0 1563 }
jbe/bsw@0 1564
jbe@23 1565 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1566 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1567 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1568 }
jbe/bsw@0 1569
jbe@23 1570 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1571 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1572 lua_settop(L, 2);
jbe/bsw@0 1573 while (lua_toboolean(L, 1)) {
jbe@23 1574 // get "foreign_keys" table:
jbe/bsw@0 1575 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1576 // perform lookup:
jbe/bsw@0 1577 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1578 lua_gettable(L, 3); // 4
jbe@23 1579 // return result, if lookup was successful:
jbe/bsw@0 1580 if (!lua_isnil(L, 4)) return 1;
jbe@23 1581 // replace current table by its prototype:
jbe/bsw@0 1582 lua_settop(L, 2);
jbe/bsw@0 1583 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1584 lua_rawget(L, 1); // 3
jbe/bsw@0 1585 lua_replace(L, 1);
jbe/bsw@0 1586 }
jbe@23 1587 // return nothing:
jbe/bsw@0 1588 return 0;
jbe/bsw@0 1589 }
jbe/bsw@0 1590
jbe@23 1591 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1592 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1593 const char *result_type;
jbe@23 1594 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1595 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1596 return 0;
jbe/bsw@0 1597 }
jbe@384 1598 // value of "_class" attribute or default class on stack position 3:
jbe@23 1599 lua_settop(L, 2);
jbe/bsw@0 1600 lua_getfield(L, 1, "_class"); // 3
jbe/bsw@0 1601 if (!lua_toboolean(L, 3)) {
jbe/bsw@0 1602 lua_settop(L, 2);
jbe@413 1603 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe/bsw@0 1604 }
jbe@23 1605 // get value of "_type" attribute:
jbe/bsw@0 1606 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1607 result_type = lua_tostring(L, 4);
jbe@23 1608 // different lookup for lists and objects:
jbe@23 1609 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1610 lua_settop(L, 3);
jbe@384 1611 // try inherited attributes, methods or getter functions:
jbe@383 1612 lua_pushvalue(L, 3); // 4
jbe@383 1613 while (lua_toboolean(L, 4)) {
jbe@383 1614 lua_getfield(L, 4, "object"); // 5
jbe@383 1615 lua_pushvalue(L, 2); // 6
jbe@383 1616 lua_gettable(L, 5); // 6
jbe@383 1617 if (!lua_isnil(L, 6)) return 1;
jbe@383 1618 lua_settop(L, 4);
jbe@383 1619 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1620 lua_pushvalue(L, 2); // 6
jbe@383 1621 lua_gettable(L, 5); // 6
jbe@383 1622 if (lua_toboolean(L, 6)) {
jbe@383 1623 lua_pushvalue(L, 1); // 7
jbe@383 1624 lua_call(L, 1, 1); // 6
jbe/bsw@0 1625 return 1;
jbe/bsw@0 1626 }
jbe@383 1627 lua_settop(L, 4);
jbe@383 1628 lua_pushliteral(L, "prototype"); // 5
jbe@383 1629 lua_rawget(L, 4); // 5
jbe@383 1630 lua_replace(L, 4);
jbe/bsw@0 1631 }
jbe@383 1632 lua_settop(L, 3);
jbe/bsw@0 1633 // try primary keys of referenced objects:
jbe/bsw@0 1634 lua_pushcfunction(L,
jbe/bsw@0 1635 mondelefant_class_get_foreign_key_reference_name
jbe@383 1636 ); // 4
jbe@383 1637 lua_pushvalue(L, 3); // 5
jbe@383 1638 lua_pushvalue(L, 2); // 6
jbe@383 1639 lua_call(L, 2, 1); // 4
jbe@383 1640 if (!lua_isnil(L, 4)) {
jbe@383 1641 // reference name at stack position 4
jbe@383 1642 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1643 lua_pushvalue(L, 3); // 6
jbe@383 1644 lua_pushvalue(L, 4); // 7
jbe@383 1645 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1646 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1647 lua_getfield(L, 5, "ref"); // 7
jbe@383 1648 lua_gettable(L, 6); // 7
jbe@383 1649 if (!lua_isnil(L, 7)) {
jbe@383 1650 if (lua_toboolean(L, 7)) {
jbe@383 1651 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1652 if (lua_isnil(L, 8)) {
jbe/bsw@0 1653 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1654 }
jbe@383 1655 lua_gettable(L, 7); // 8
jbe/bsw@0 1656 } else {
jbe/bsw@0 1657 lua_pushnil(L);
jbe/bsw@0 1658 }
jbe/bsw@0 1659 return 1;
jbe/bsw@0 1660 }
jbe/bsw@0 1661 }
jbe@383 1662 lua_settop(L, 3);
jbe@383 1663 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1664 // try cached referenced object (or cached NULL reference):
jbe@383 1665 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1666 lua_pushvalue(L, 2); // 6
jbe@383 1667 lua_gettable(L, 5); // 6
jbe@383 1668 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1669 lua_pushnil(L);
jbe/bsw@0 1670 return 1;
jbe@383 1671 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1672 return 1;
jbe/bsw@0 1673 }
jbe@383 1674 lua_settop(L, 4);
jbe/bsw@0 1675 // try to load a referenced object:
jbe@383 1676 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1677 lua_pushvalue(L, 3); // 6
jbe@383 1678 lua_pushvalue(L, 2); // 7
jbe@383 1679 lua_call(L, 2, 1); // 5
jbe@383 1680 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1681 lua_settop(L, 2);
jbe/bsw@0 1682 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1683 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1684 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1685 lua_call(L, 2, 0);
jbe/bsw@0 1686 lua_settop(L, 2);
jbe/bsw@0 1687 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1688 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1689 lua_gettable(L, 3); // 4
jbe/bsw@0 1690 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1691 return 1;
jbe/bsw@0 1692 }
jbe@383 1693 lua_settop(L, 4);
jbe@415 1694 // check if proxy access to document in special column is enabled:
jbe@383 1695 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1696 if (lua_toboolean(L, 5)) {
jbe@415 1697 // if yes, then proxy access:
jbe@383 1698 lua_gettable(L, 4); // 5
jbe@383 1699 if (!lua_isnil(L, 5)) {
jbe@383 1700 lua_pushvalue(L, 2); // 6
jbe@383 1701 lua_gettable(L, 5); // 6
jbe@383 1702 }
jbe@415 1703 } else {
jbe@415 1704 // else use _data table:
jbe@415 1705 lua_pushvalue(L, 2); // 6
jbe@415 1706 lua_gettable(L, 4); // 6
jbe@383 1707 }
jbe@415 1708 return 1; // return element at stack position 5 or 6
jbe@23 1709 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1710 lua_settop(L, 3);
jbe/bsw@0 1711 // try inherited list attributes or methods:
jbe/bsw@0 1712 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1713 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1714 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1715 lua_gettable(L, 4); // 5
jbe/bsw@0 1716 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1717 lua_settop(L, 3);
jbe/bsw@0 1718 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1719 lua_rawget(L, 3); // 4
jbe/bsw@0 1720 lua_replace(L, 3);
jbe/bsw@0 1721 }
jbe/bsw@0 1722 }
jbe@23 1723 // return nothing:
jbe/bsw@0 1724 return 0;
jbe/bsw@0 1725 }
jbe/bsw@0 1726
jbe@23 1727 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1728 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1729 const char *result_type;
jbe@23 1730 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1731 lua_settop(L, 3);
jbe/bsw@0 1732 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1733 lua_rawset(L, 1);
jbe/bsw@0 1734 return 1;
jbe/bsw@0 1735 }
jbe@384 1736 // value of "_class" attribute or default class on stack position 4:
jbe@384 1737 lua_settop(L, 3);
jbe/bsw@0 1738 lua_getfield(L, 1, "_class"); // 4
jbe/bsw@0 1739 if (!lua_toboolean(L, 4)) {
jbe/bsw@0 1740 lua_settop(L, 3);
jbe@413 1741 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1742 }
jbe@23 1743 // get value of "_type" attribute:
jbe/bsw@0 1744 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1745 result_type = lua_tostring(L, 5);
jbe@378 1746 // distinguish between lists and objects:
jbe@378 1747 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1748 lua_settop(L, 4);
jbe@378 1749 // try object setter functions:
jbe@384 1750 lua_pushvalue(L, 4); // 5
jbe@384 1751 while (lua_toboolean(L, 5)) {
jbe@384 1752 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1753 lua_pushvalue(L, 2); // 7
jbe@384 1754 lua_gettable(L, 6); // 7
jbe@384 1755 if (lua_toboolean(L, 7)) {
jbe@384 1756 lua_pushvalue(L, 1); // 8
jbe@384 1757 lua_pushvalue(L, 3); // 9
jbe@378 1758 lua_call(L, 2, 0);
jbe@378 1759 return 0;
jbe@378 1760 }
jbe@384 1761 lua_settop(L, 5);
jbe@384 1762 lua_pushliteral(L, "prototype"); // 6
jbe@384 1763 lua_rawget(L, 5); // 6
jbe@384 1764 lua_replace(L, 5);
jbe@378 1765 }
jbe@384 1766 lua_settop(L, 4);
jbe@384 1767 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1768 // check, if a object reference is changed:
jbe@384 1769 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1770 lua_pushvalue(L, 4); // 7
jbe@384 1771 lua_pushvalue(L, 2); // 8
jbe@384 1772 lua_call(L, 2, 1); // 6
jbe@384 1773 if (!lua_isnil(L, 6)) {
jbe/bsw@0 1774 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1775 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1776 lua_pushvalue(L, 2); // 8
jbe@384 1777 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1778 else lua_pushvalue(L, 3); // 9
jbe@384 1779 lua_settable(L, 7);
jbe@384 1780 lua_settop(L, 6);
jbe/bsw@0 1781 // delete referencing key from _data table:
jbe@384 1782 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1783 if (lua_isnil(L, 7)) {
jbe/bsw@0 1784 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1785 }
jbe@384 1786 lua_pushvalue(L, 7); // 8
jbe@384 1787 lua_pushnil(L); // 9
jbe@384 1788 lua_settable(L, 5);
jbe@384 1789 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1790 lua_pushvalue(L, 7); // 9
jbe@384 1791 lua_pushboolean(L, 1); // 10
jbe@384 1792 lua_settable(L, 8);
jbe@384 1793 return 0;
jbe@384 1794 }
jbe@384 1795 lua_settop(L, 5);
jbe@384 1796 // check proxy access to document in special column:
jbe@384 1797 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1798 if (lua_toboolean(L, 6)) {
jbe@414 1799 lua_gettable(L, 5); // 6
jbe@414 1800 if (lua_isnil(L, 6)) {
jbe@414 1801 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1802 }
jbe@414 1803 lua_pushvalue(L, 2); // 7
jbe@414 1804 lua_pushvalue(L, 3); // 8
jbe@414 1805 lua_settable(L, 6);
jbe@414 1806 return 0;
jbe@384 1807 }
jbe@384 1808 lua_settop(L, 5);
jbe@384 1809 // store value in data field info:
jbe@384 1810 lua_pushvalue(L, 2); // 6
jbe@384 1811 lua_pushvalue(L, 3); // 7
jbe@384 1812 lua_settable(L, 5);
jbe@384 1813 lua_settop(L, 4);
jbe@384 1814 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1815 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1816 lua_pushvalue(L, 2); // 6
jbe@384 1817 lua_pushboolean(L, 1); // 7
jbe@384 1818 lua_settable(L, 5);
jbe@384 1819 lua_settop(L, 4);
jbe@384 1820 // reset reference cache, if neccessary:
jbe@384 1821 lua_pushcfunction(L,
jbe@384 1822 mondelefant_class_get_foreign_key_reference_name
jbe@384 1823 ); // 5
jbe@384 1824 lua_pushvalue(L, 4); // 6
jbe@384 1825 lua_pushvalue(L, 2); // 7
jbe@384 1826 lua_call(L, 2, 1); // 5
jbe@384 1827 if (!lua_isnil(L, 5)) {
jbe@384 1828 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1829 lua_pushvalue(L, 5); // 7
jbe@382 1830 lua_pushnil(L); // 8
jbe@382 1831 lua_settable(L, 6);
jbe/bsw@0 1832 }
jbe/bsw@0 1833 return 0;
jbe@23 1834 } else { // non-objects (i.e. lists)
jbe@23 1835 // perform rawset:
jbe/bsw@0 1836 lua_settop(L, 3);
jbe/bsw@0 1837 lua_rawset(L, 1);
jbe/bsw@0 1838 return 0;
jbe/bsw@0 1839 }
jbe/bsw@0 1840 }
jbe/bsw@0 1841
jbe@416 1842 // meta-method "__index" of column proxy:
jbe@416 1843 static int mondelefant_columns_index(lua_State *L) {
jbe@416 1844 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1845 lua_settop(L, 2);
jbe@416 1846 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 3
jbe@416 1847 lua_getfield(L, 3, "_data"); // 4
jbe@416 1848 lua_pushvalue(L, 2); // 5
jbe@416 1849 lua_gettable(L, 4); // 5
jbe@416 1850 return 1;
jbe@416 1851 }
jbe@416 1852
jbe@416 1853 // meta-method "__newindex" of column proxy:
jbe@416 1854 static int mondelefant_columns_newindex(lua_State *L) {
jbe@416 1855 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1856 lua_settop(L, 3);
jbe@416 1857 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 4
jbe@416 1858 lua_getfield(L, 4, "_data"); // 5
jbe@416 1859 lua_getfield(L, 4, "_dirty"); // 6
jbe@416 1860 lua_pushvalue(L, 2);
jbe@416 1861 lua_pushvalue(L, 3);
jbe@416 1862 lua_settable(L, 5);
jbe@416 1863 lua_pushvalue(L, 2);
jbe@416 1864 lua_pushboolean(L, 1);
jbe@416 1865 lua_settable(L, 6);
jbe@416 1866 return 0;
jbe@416 1867 }
jbe@416 1868
jbe@23 1869 // meta-method "__index" of classes (models):
jbe/bsw@0 1870 static int mondelefant_class_index(lua_State *L) {
jbe@23 1871 // perform lookup in prototype:
jbe/bsw@0 1872 lua_settop(L, 2);
jbe/bsw@0 1873 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1874 lua_rawget(L, 1); // 3
jbe/bsw@0 1875 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1876 lua_gettable(L, 3); // 4
jbe/bsw@0 1877 return 1;
jbe/bsw@0 1878 }
jbe/bsw@0 1879
jbe@23 1880 // registration information for functions of library:
jbe/bsw@0 1881 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1882 {"connect", mondelefant_connect},
jbe/bsw@0 1883 {"set_class", mondelefant_set_class},
jbe/bsw@0 1884 {"new_class", mondelefant_new_class},
jbe/bsw@0 1885 {NULL, NULL}
jbe/bsw@0 1886 };
jbe/bsw@0 1887
jbe@23 1888 // registration information for meta-methods of database connections:
jbe/bsw@0 1889 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1890 {"__gc", mondelefant_conn_free},
jbe/bsw@0 1891 {"__index", mondelefant_conn_index},
jbe/bsw@0 1892 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 1893 {NULL, NULL}
jbe/bsw@0 1894 };
jbe/bsw@0 1895
jbe@23 1896 // registration information for methods of database connections:
jbe/bsw@0 1897 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 1898 {"close", mondelefant_conn_close},
jbe/bsw@0 1899 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 1900 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@397 1901 {"try_wait", mondelefant_conn_try_wait},
jbe@393 1902 {"wait", mondelefant_conn_wait},
jbe/bsw@0 1903 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 1904 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 1905 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 1906 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 1907 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 1908 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 1909 {"query", mondelefant_conn_query},
jbe/bsw@0 1910 {NULL, NULL}
jbe/bsw@0 1911 };
jbe/bsw@0 1912
jbe@23 1913 // registration information for meta-methods of error objects:
jbe/bsw@0 1914 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe/bsw@0 1915 {NULL, NULL}
jbe/bsw@0 1916 };
jbe/bsw@0 1917
jbe@23 1918 // registration information for methods of error objects:
jbe/bsw@0 1919 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe@397 1920 {"escalate", lua_error},
jbe/bsw@0 1921 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 1922 {NULL, NULL}
jbe/bsw@0 1923 };
jbe/bsw@0 1924
jbe@23 1925 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 1926 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 1927 {"__index", mondelefant_result_index},
jbe/bsw@0 1928 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 1929 {NULL, NULL}
jbe/bsw@0 1930 };
jbe/bsw@0 1931
jbe@416 1932 // registration information for meta-methods of classes (models):
jbe/bsw@0 1933 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 1934 {"__index", mondelefant_class_index},
jbe/bsw@0 1935 {NULL, NULL}
jbe/bsw@0 1936 };
jbe/bsw@0 1937
jbe@23 1938 // registration information for methods of classes (models):
jbe/bsw@0 1939 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 1940 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 1941 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 1942 {"get_foreign_key_reference_name",
jbe/bsw@0 1943 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 1944 {NULL, NULL}
jbe/bsw@0 1945 };
jbe/bsw@0 1946
jbe@23 1947 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 1948 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 1949 {NULL, NULL}
jbe/bsw@0 1950 };
jbe/bsw@0 1951
jbe@23 1952 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 1953 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 1954 {NULL, NULL}
jbe/bsw@0 1955 };
jbe/bsw@0 1956
jbe@416 1957 // registration information for meta-methods of column proxy:
jbe@416 1958 static const struct luaL_Reg mondelefant_columns_mt_functions[] = {
jbe@416 1959 {"__index", mondelefant_columns_index},
jbe@416 1960 {"__newindex", mondelefant_columns_newindex},
jbe@416 1961 {NULL, NULL}
jbe@416 1962 };
jbe@416 1963
jbe@23 1964 // luaopen function to initialize/register library:
jbe/bsw@0 1965 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 1966 lua_settop(L, 0);
jbe@416 1967
jbe@416 1968 lua_newtable(L); // meta-table for columns proxy
jbe@416 1969 luaL_setfuncs(L, mondelefant_columns_mt_functions, 0);
jbe@416 1970 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 1971
jbe/bsw@0 1972 lua_newtable(L); // module at stack position 1
jbe@64 1973 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe/bsw@0 1974
jbe/bsw@0 1975 lua_pushvalue(L, 1); // 2
jbe/bsw@0 1976 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 1977
jbe/bsw@0 1978 lua_newtable(L); // 2
jbe/bsw@0 1979 // NOTE: only PostgreSQL is supported yet:
jbe@64 1980 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe/bsw@0 1981 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 1982 lua_newtable(L); // 2
jbe/bsw@0 1983 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 1984
jbe/bsw@0 1985 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 1986 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe/bsw@0 1987 lua_settop(L, 1);
jbe/bsw@0 1988 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 1989 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe/bsw@0 1990 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 1991 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 1992 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe/bsw@0 1993 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 1994
jbe/bsw@0 1995 lua_newtable(L); // 2
jbe@272 1996 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe/bsw@0 1997 lua_newtable(L); // 3
jbe@64 1998 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe/bsw@0 1999 lua_setfield(L, 2, "object");
jbe/bsw@0 2000 lua_newtable(L); // 3
jbe/bsw@0 2001 lua_setfield(L, 2, "object_get");
jbe/bsw@0 2002 lua_newtable(L); // 3
jbe/bsw@0 2003 lua_setfield(L, 2, "object_set");
jbe/bsw@0 2004 lua_newtable(L); // 3
jbe@64 2005 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe/bsw@0 2006 lua_setfield(L, 2, "list");
jbe/bsw@0 2007 lua_newtable(L); // 3
jbe/bsw@0 2008 lua_setfield(L, 2, "references");
jbe/bsw@0 2009 lua_newtable(L); // 3
jbe/bsw@0 2010 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 2011 lua_pushvalue(L, 2); // 3
jbe/bsw@0 2012 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 2013 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 2014
jbe/bsw@0 2015 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 2016 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe/bsw@0 2017 lua_newtable(L); // 3
jbe@64 2018 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe/bsw@0 2019 lua_setfield(L, 2, "__index");
jbe/bsw@0 2020 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 2021
jbe/bsw@0 2022 return 1;
jbe/bsw@0 2023 }

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