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annotate libraries/mondelefant/mondelefant_native.c @ 548:a006593b747c

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Basic support for database array types (integers and strings)
author jbe
date Mon Oct 21 19:55:13 2019 +0200 (2019-10-21)
parents 75fd8869bc4e
children e13a3fa97aad
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@548 76 case 199: return "json_array";
jbe/bsw@0 77 case 600: return "point";
jbe/bsw@0 78 case 601: return "lseg";
jbe/bsw@0 79 case 602: return "path";
jbe/bsw@0 80 case 603: return "box";
jbe/bsw@0 81 case 604: return "polygon";
jbe/bsw@0 82 case 628: return "line";
jbe/bsw@0 83 case 700: return "float4";
jbe/bsw@0 84 case 701: return "float8";
jbe/bsw@0 85 case 705: return "unknown";
jbe/bsw@0 86 case 718: return "circle";
jbe/bsw@0 87 case 790: return "money";
jbe/bsw@0 88 case 829: return "macaddr";
jbe/bsw@0 89 case 869: return "inet";
jbe/bsw@0 90 case 650: return "cidr";
jbe@548 91 case 1000: return "bool_array";
jbe@548 92 case 1001: return "bytea_array";
jbe@548 93 case 1002: return "char_array";
jbe@548 94 case 1005: return "int2_array";
jbe@548 95 case 1007: return "int4_array";
jbe@548 96 case 1009: return "text_array";
jbe@548 97 case 1015: return "varchar_array";
jbe@548 98 case 1016: return "int8_array";
jbe@548 99 case 1021: return "float4_array";
jbe@548 100 case 1022: return "float8_array";
jbe/bsw@0 101 case 1042: return "bpchar";
jbe/bsw@0 102 case 1043: return "varchar";
jbe/bsw@0 103 case 1082: return "date";
jbe/bsw@0 104 case 1083: return "time";
jbe/bsw@0 105 case 1114: return "timestamp";
jbe@548 106 case 1115: return "timestamp_array";
jbe@548 107 case 1182: return "date_array";
jbe@548 108 case 1183: return "time_array";
jbe/bsw@0 109 case 1184: return "timestamptz";
jbe@548 110 case 1185: return "timestamptz_array";
jbe/bsw@0 111 case 1186: return "interval";
jbe@548 112 case 1187: return "interval_array";
jbe@548 113 case 1231: return "numeric_array";
jbe/bsw@0 114 case 1266: return "timetz";
jbe@548 115 case 1270: return "timetz_array";
jbe/bsw@0 116 case 1560: return "bit";
jbe@548 117 case 1561: return "bit_array";
jbe/bsw@0 118 case 1562: return "varbit";
jbe@548 119 case 1563: return "varbit_array";
jbe/bsw@0 120 case 1700: return "numeric";
jbe@176 121 case 3802: return "jsonb";
jbe@548 122 case 3807: return "jsonb_array";
jbe/bsw@0 123 default: return NULL;
jbe/bsw@0 124 }
jbe/bsw@0 125 }
jbe/bsw@0 126
jbe@23 127 // This library maps PostgreSQL's error codes to CamelCase string
jbe@23 128 // identifiers, which consist of CamelCase identifiers and are seperated
jbe@23 129 // by dots (".") (no leading or trailing dots).
jbe@23 130 // There are additional error identifiers which do not have a corresponding
jbe@23 131 // PostgreSQL error associated with it.
jbe@23 132
jbe@23 133 // matching start of local variable 'pgcode' against string 'incode',
jbe@23 134 // returning string 'outcode' on match:
jbe/bsw@0 135 #define mondelefant_errcode_item(incode, outcode) \
jbe/bsw@0 136 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
jbe/bsw@0 137
jbe@23 138 // additional error identifiers without corresponding PostgreSQL error:
jbe/bsw@0 139 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
jbe/bsw@0 140 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
jbe/bsw@0 141 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
jbe/bsw@0 142 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
jbe/bsw@0 143 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
jbe/bsw@0 144 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
jbe/bsw@0 145
jbe@23 146 // mapping PostgreSQL error code to error code as returned by this library:
jbe/bsw@0 147 static const char *mondelefant_translate_errcode(const char *pgcode) {
jbe/bsw@0 148 if (!pgcode) abort(); // should not happen
jbe/bsw@0 149 mondelefant_errcode_item("02", "NoData")
jbe/bsw@0 150 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
jbe/bsw@0 151 mondelefant_errcode_item("08", "ConnectionException")
jbe/bsw@0 152 mondelefant_errcode_item("09", "TriggeredActionException")
jbe/bsw@0 153 mondelefant_errcode_item("0A", "FeatureNotSupported")
jbe/bsw@0 154 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
jbe/bsw@0 155 mondelefant_errcode_item("0F", "LocatorException")
jbe/bsw@0 156 mondelefant_errcode_item("0L", "InvalidGrantor")
jbe/bsw@0 157 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
jbe/bsw@0 158 mondelefant_errcode_item("21", "CardinalityViolation")
jbe/bsw@0 159 mondelefant_errcode_item("22", "DataException")
jbe/bsw@0 160 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
jbe/bsw@0 161 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
jbe/bsw@0 162 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
jbe/bsw@0 163 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
jbe/bsw@0 164 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
jbe/bsw@0 165 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
jbe/bsw@0 166 mondelefant_errcode_item("24", "InvalidCursorState")
jbe/bsw@0 167 mondelefant_errcode_item("25", "InvalidTransactionState")
jbe/bsw@0 168 mondelefant_errcode_item("26", "InvalidSqlStatementName")
jbe/bsw@0 169 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
jbe/bsw@0 170 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
jbe/bsw@0 171 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
jbe/bsw@0 172 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
jbe/bsw@0 173 mondelefant_errcode_item("2F", "SqlRoutineException")
jbe/bsw@0 174 mondelefant_errcode_item("34", "InvalidCursorName")
jbe/bsw@0 175 mondelefant_errcode_item("38", "ExternalRoutineException")
jbe/bsw@0 176 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
jbe/bsw@0 177 mondelefant_errcode_item("3B", "SavepointException")
jbe/bsw@0 178 mondelefant_errcode_item("3D", "InvalidCatalogName")
jbe/bsw@0 179 mondelefant_errcode_item("3F", "InvalidSchemaName")
jbe/bsw@0 180 mondelefant_errcode_item("40", "TransactionRollback")
jbe/bsw@0 181 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
jbe/bsw@0 182 mondelefant_errcode_item("44", "WithCheckOptionViolation")
jbe/bsw@0 183 mondelefant_errcode_item("53", "InsufficientResources")
jbe/bsw@0 184 mondelefant_errcode_item("54", "ProgramLimitExceeded")
jbe/bsw@0 185 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
jbe/bsw@0 186 mondelefant_errcode_item("57", "OperatorIntervention")
jbe/bsw@0 187 mondelefant_errcode_item("58", "SystemError")
jbe/bsw@0 188 mondelefant_errcode_item("F0", "ConfigurationFileError")
jbe/bsw@0 189 mondelefant_errcode_item("P0", "PlpgsqlError")
jbe/bsw@0 190 mondelefant_errcode_item("XX", "InternalError")
jbe/bsw@0 191 return "unknown";
jbe/bsw@0 192 }
jbe/bsw@0 193
jbe@23 194 // C-function, checking if a given error code (as defined by this library)
jbe@23 195 // is belonging to a certain class of errors (strings are equal or error
jbe@23 196 // code begins with error class followed by a dot):
jbe/bsw@0 197 static int mondelefant_check_error_class(
jbe/bsw@0 198 const char *errcode, const char *errclass
jbe/bsw@0 199 ) {
jbe/bsw@0 200 size_t i = 0;
jbe/bsw@0 201 while (1) {
jbe/bsw@0 202 if (errclass[i] == 0) {
jbe/bsw@0 203 if (errcode[i] == 0 || errcode[i] == '.') return 1;
jbe/bsw@0 204 else return 0;
jbe/bsw@0 205 }
jbe/bsw@0 206 if (errcode[i] != errclass[i]) return 0;
jbe/bsw@0 207 i++;
jbe/bsw@0 208 }
jbe/bsw@0 209 }
jbe/bsw@0 210
jbe@23 211 // pushing first line of a string on Lua's stack (without trailing CR/LF):
jbe/bsw@0 212 static void mondelefant_push_first_line(lua_State *L, const char *str) {
jbe/bsw@0 213 size_t i = 0;
jbe/bsw@0 214 if (!str) abort(); // should not happen
jbe/bsw@0 215 while (1) {
jbe@397 216 char c = str[i];
jbe@397 217 if (c == '\n' || c == '\r' || c == 0) {
jbe@397 218 lua_pushlstring(L, str, i);
jbe@397 219 return;
jbe@397 220 }
jbe/bsw@0 221 i++;
jbe@397 222 }
jbe/bsw@0 223 }
jbe/bsw@0 224
jbe@23 225 // "connect" function of library, which establishes a database connection
jbe@23 226 // and returns a database connection handle:
jbe/bsw@0 227 static int mondelefant_connect(lua_State *L) {
jbe@23 228 const char *conninfo; // string for PQconnectdb function
jbe@23 229 mondelefant_conn_t *conn; // C-structure for userdata
jbe@402 230 // check if string is given as first argument:
jbe@402 231 if (lua_type(L, 1) != LUA_TSTRING) {
jbe@402 232 // expect a table as first argument if no string is given:
jbe@402 233 luaL_checktype(L, 1, LUA_TTABLE);
jbe@406 234 // extract conninfo string for PQconnectdb if possible:
jbe@406 235 lua_getfield(L, 1, "conninfo");
jbe@406 236 if (!lua_isnil(L, -1)) {
jbe@402 237 // if yes, use that value but check its type:
jbe@406 238 luaL_argcheck(L, lua_type(L, -1) == LUA_TSTRING, 1, "\"conninfo\" value is not a string");
jbe@402 239 } else {
jbe@402 240 // otherwise assemble conninfo string from the named options:
jbe@402 241 luaL_Buffer buf;
jbe@40 242 int need_seperator = 0;
jbe@402 243 const char *value;
jbe@402 244 size_t value_len;
jbe@422 245 size_t value_pos;
jbe@402 246 lua_settop(L, 1);
jbe@402 247 lua_pushnil(L); // slot for key at stack position 2
jbe@402 248 lua_pushnil(L); // slot for value at stack position 3
jbe@402 249 luaL_buffinit(L, &buf);
jbe@40 250 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
jbe@402 251 luaL_argcheck(L, lua_isstring(L, -2), 1, "key in table is not a string");
jbe@420 252 value = luaL_tolstring(L, -1, &value_len);
jbe@40 253 lua_replace(L, 3);
jbe@402 254 lua_pop(L, 1);
jbe@40 255 lua_replace(L, 2);
jbe@402 256 if (need_seperator) luaL_addchar(&buf, ' ');
jbe@40 257 // NOTE: numbers will be converted to strings automatically here,
jbe@40 258 // but perhaps this will change in future versions of lua
jbe@40 259 lua_pushvalue(L, 2);
jbe@402 260 luaL_addvalue(&buf);
jbe@402 261 luaL_addchar(&buf, '=');
jbe@402 262 luaL_addchar(&buf, '\'');
jbe@422 263 value_pos = 0;
jbe@402 264 do {
jbe@402 265 char c;
jbe@402 266 c = value[value_pos++];
jbe@402 267 if (c == '\'') luaL_addchar(&buf, '\\');
jbe@402 268 luaL_addchar(&buf, c);
jbe@402 269 } while (value_pos < value_len);
jbe@402 270 luaL_addchar(&buf, '\'');
jbe@402 271 need_seperator = 1;
jbe/bsw@0 272 }
jbe@402 273 luaL_pushresult(&buf);
jbe/bsw@0 274 }
jbe@420 275 // ensure that string is on stack position 1:
jbe@402 276 lua_replace(L, 1);
jbe/bsw@0 277 }
jbe@402 278 // use conninfo string on stack position 1:
jbe@402 279 conninfo = lua_tostring(L, 1);
jbe@423 280 // create (zero'ed) userdata on stack position 2:
jbe@406 281 lua_settop(L, 1);
jbe@423 282 conn = memset(lua_newuserdata(L, sizeof(*conn)), 0, sizeof(*conn)); // 2
jbe@23 283 // call PQconnectdb function of libpq:
jbe@406 284 conn->pgconn = PQconnectdb(conninfo);
jbe@406 285 // try emergency garbage collection on first failure:
jbe@406 286 if (!conn->pgconn) {
jbe@406 287 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@406 288 conn->pgconn = PQconnectdb(conninfo);
jbe@407 289 // throw error in case of (unexpected) error of PQconnectdb call:
jbe@407 290 if (!conn->pgconn) return luaL_error(L,
jbe@407 291 "Error in libpq while creating 'PGconn' structure."
jbe@407 292 );
jbe/bsw@0 293 }
jbe@406 294 // set metatable for userdata (ensure PQfinish on unexpected error below):
jbe@406 295 luaL_setmetatable(L, MONDELEFANT_CONN_MT_REGKEY);
jbe@406 296 // check result of PQconnectdb call:
jbe@406 297 if (PQstatus(conn->pgconn) != CONNECTION_OK) {
jbe@406 298 lua_pushnil(L); // 3
jbe@406 299 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 4
jbe@406 300 lua_newtable(L); // 5
jbe@406 301 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 302 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@406 303 lua_setfield(L, 5, "code");
jbe@406 304 lua_pushvalue(L, 4);
jbe@406 305 lua_setfield(L, 5, "message");
jbe@406 306 // manual PQfinish (do not wait until garbage collection):
jbe@406 307 PQfinish(conn->pgconn);
jbe@406 308 conn->pgconn = NULL;
jbe/bsw@0 309 return 3;
jbe/bsw@0 310 }
jbe@23 311 // set 'server_encoding' in C-struct of userdata:
jbe/bsw@0 312 {
jbe/bsw@0 313 const char *charset;
jbe@406 314 charset = PQparameterStatus(conn->pgconn, "server_encoding");
jbe/bsw@0 315 if (charset && !strcmp(charset, "UTF8")) {
jbe/bsw@0 316 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
jbe/bsw@0 317 } else {
jbe/bsw@0 318 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
jbe/bsw@0 319 }
jbe/bsw@0 320 }
jbe@396 321 // create and associate userdata table:
jbe@396 322 lua_newtable(L);
jbe@406 323 lua_setuservalue(L, 2);
jbe@396 324 // store key "fd" with file descriptor of connection:
jbe@406 325 lua_pushinteger(L, PQsocket(conn->pgconn));
jbe@406 326 lua_setfield(L, 2, "fd");
jbe@23 327 // store key "engine" with value "postgresql" as connection specific data:
jbe/bsw@0 328 lua_pushliteral(L, "postgresql");
jbe@406 329 lua_setfield(L, 2, "engine");
jbe@23 330 // return userdata:
jbe/bsw@0 331 return 1;
jbe/bsw@0 332 }
jbe/bsw@0 333
jbe@23 334 // returns pointer to libpq handle 'pgconn' of userdata at given index
jbe@23 335 // (or throws error, if database connection has been closed):
jbe/bsw@0 336 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
jbe/bsw@0 337 mondelefant_conn_t *conn;
jbe/bsw@0 338 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 339 if (!conn->pgconn) {
jbe/bsw@0 340 luaL_error(L, "PostgreSQL connection has been closed.");
jbe/bsw@0 341 return NULL;
jbe/bsw@0 342 }
jbe/bsw@0 343 return conn;
jbe/bsw@0 344 }
jbe/bsw@0 345
jbe@23 346 // meta-method "__index" of database handles (userdata):
jbe/bsw@0 347 static int mondelefant_conn_index(lua_State *L) {
jbe@23 348 // try table for connection specific data:
jbe/bsw@0 349 lua_settop(L, 2);
jbe@396 350 lua_getuservalue(L, 1); // 3
jbe/bsw@0 351 lua_pushvalue(L, 2); // 4
jbe/bsw@0 352 lua_gettable(L, 3); // 4
jbe/bsw@0 353 if (!lua_isnil(L, 4)) return 1;
jbe@23 354 // try to use prototype stored in connection specific data:
jbe/bsw@0 355 lua_settop(L, 3);
jbe/bsw@0 356 lua_getfield(L, 3, "prototype"); // 4
jbe/bsw@0 357 if (lua_toboolean(L, 4)) {
jbe/bsw@0 358 lua_pushvalue(L, 2); // 5
jbe/bsw@0 359 lua_gettable(L, 4); // 5
jbe/bsw@0 360 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 361 }
jbe@23 362 // try to use "postgresql_connection_prototype" of library:
jbe/bsw@0 363 lua_settop(L, 2);
jbe/bsw@0 364 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
jbe/bsw@0 365 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
jbe/bsw@0 366 if (lua_toboolean(L, 4)) {
jbe/bsw@0 367 lua_pushvalue(L, 2); // 5
jbe/bsw@0 368 lua_gettable(L, 4); // 5
jbe/bsw@0 369 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 370 }
jbe@23 371 // try to use "connection_prototype" of library:
jbe/bsw@0 372 lua_settop(L, 3);
jbe/bsw@0 373 lua_getfield(L, 3, "connection_prototype"); // 4
jbe/bsw@0 374 if (lua_toboolean(L, 4)) {
jbe/bsw@0 375 lua_pushvalue(L, 2); // 5
jbe/bsw@0 376 lua_gettable(L, 4); // 5
jbe/bsw@0 377 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 378 }
jbe@23 379 // give up and return nothing:
jbe/bsw@0 380 return 0;
jbe/bsw@0 381 }
jbe/bsw@0 382
jbe@23 383 // meta-method "__newindex" of database handles (userdata):
jbe/bsw@0 384 static int mondelefant_conn_newindex(lua_State *L) {
jbe@23 385 // store key-value pair in table for connection specific data:
jbe/bsw@0 386 lua_settop(L, 3);
jbe@396 387 lua_getuservalue(L, 1); // 4
jbe/bsw@0 388 lua_pushvalue(L, 2);
jbe/bsw@0 389 lua_pushvalue(L, 3);
jbe/bsw@0 390 lua_settable(L, 4);
jbe@23 391 // return nothing:
jbe/bsw@0 392 return 0;
jbe/bsw@0 393 }
jbe/bsw@0 394
jbe@23 395 // meta-method "__gc" of database handles:
jbe/bsw@0 396 static int mondelefant_conn_free(lua_State *L) {
jbe/bsw@0 397 mondelefant_conn_t *conn;
jbe/bsw@0 398 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@410 399 if (conn->todo_PQfreemem) {
jbe@410 400 PQfreemem(conn->todo_PQfreemem);
jbe@410 401 conn->todo_PQfreemem = NULL;
jbe@410 402 }
jbe@410 403 if (conn->todo_PQclear) {
jbe@410 404 PQclear(conn->todo_PQclear);
jbe@410 405 conn->todo_PQclear = NULL;
jbe@410 406 }
jbe@410 407 if (conn->pgconn) {
jbe@410 408 PQfinish(conn->pgconn);
jbe@410 409 conn->pgconn = NULL;
jbe@410 410 }
jbe/bsw@0 411 return 0;
jbe/bsw@0 412 }
jbe/bsw@0 413
jbe@23 414 // method "close" of database handles:
jbe/bsw@0 415 static int mondelefant_conn_close(lua_State *L) {
jbe/bsw@0 416 mondelefant_conn_t *conn;
jbe/bsw@0 417 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 418 PQfinish(conn->pgconn);
jbe/bsw@0 419 conn->pgconn = NULL;
jbe@397 420 lua_pushnil(L);
jbe@396 421 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
jbe/bsw@0 422 return 0;
jbe/bsw@0 423 }
jbe/bsw@0 424
jbe@23 425 // method "is_okay" of database handles:
jbe/bsw@0 426 static int mondelefant_conn_is_ok(lua_State *L) {
jbe/bsw@0 427 mondelefant_conn_t *conn;
jbe/bsw@0 428 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 429 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
jbe/bsw@0 430 return 1;
jbe/bsw@0 431 }
jbe/bsw@0 432
jbe@23 433 // method "get_transaction_status" of database handles:
jbe/bsw@0 434 static int mondelefant_conn_get_transaction_status(lua_State *L) {
jbe/bsw@0 435 mondelefant_conn_t *conn;
jbe/bsw@0 436 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 437 switch (PQtransactionStatus(conn->pgconn)) {
jbe/bsw@0 438 case PQTRANS_IDLE:
jbe/bsw@0 439 lua_pushliteral(L, "idle");
jbe/bsw@0 440 break;
jbe/bsw@0 441 case PQTRANS_ACTIVE:
jbe/bsw@0 442 lua_pushliteral(L, "active");
jbe/bsw@0 443 break;
jbe/bsw@0 444 case PQTRANS_INTRANS:
jbe/bsw@0 445 lua_pushliteral(L, "intrans");
jbe/bsw@0 446 break;
jbe/bsw@0 447 case PQTRANS_INERROR:
jbe/bsw@0 448 lua_pushliteral(L, "inerror");
jbe/bsw@0 449 break;
jbe/bsw@0 450 default:
jbe/bsw@0 451 lua_pushliteral(L, "unknown");
jbe/bsw@0 452 }
jbe/bsw@0 453 return 1;
jbe/bsw@0 454 }
jbe/bsw@0 455
jbe@397 456 // method "try_wait" of database handles:
jbe@397 457 static int mondelefant_conn_try_wait(lua_State *L) {
jbe@393 458 mondelefant_conn_t *conn;
jbe@393 459 int infinite, nonblock = 0;
jbe@393 460 struct timespec wakeup;
jbe@393 461 int fd;
jbe@393 462 fd_set fds;
jbe@393 463 conn = mondelefant_get_conn(L, 1);
jbe@393 464 infinite = lua_isnoneornil(L, 2);
jbe@393 465 if (!infinite) {
jbe@393 466 lua_Number n;
jbe@393 467 int isnum;
jbe@393 468 n = lua_tonumberx(L, 2, &isnum);
jbe@393 469 if (isnum && n>0 && n<=86400*366) {
jbe@393 470 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
jbe@393 471 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 472 }
jbe@393 473 wakeup.tv_sec += n;
jbe@393 474 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
jbe@393 475 if (wakeup.tv_nsec >= 1000000000) {
jbe@393 476 wakeup.tv_sec += 1;
jbe@393 477 wakeup.tv_nsec -= 1000000000;
jbe@393 478 }
jbe@393 479 } else if (isnum && n==0) {
jbe@393 480 nonblock = 1;
jbe@393 481 } else {
jbe@393 482 luaL_argcheck(L, 0, 2, "not a valid timeout");
jbe@393 483 }
jbe@393 484 }
jbe@397 485 lua_settop(L, 1);
jbe@393 486 if (!nonblock) {
jbe@393 487 fd = PQsocket(conn->pgconn);
jbe@393 488 FD_ZERO(&fds);
jbe@393 489 FD_SET(fd, &fds);
jbe@393 490 }
jbe@393 491 while (true) {
jbe@393 492 {
jbe@393 493 PGnotify *notify;
jbe@393 494 if (!PQconsumeInput(conn->pgconn)) {
jbe@397 495 lua_newtable(L); // 2
jbe@406 496 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe@397 497 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@397 498 lua_setfield(L, 2, "code");
jbe@397 499 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 3
jbe@397 500 lua_setfield(L, 2, "message");
jbe@397 501 return 1;
jbe@393 502 }
jbe@412 503 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 504 if (conn->todo_PQfreemem) {
jbe@412 505 PQfreemem(conn->todo_PQfreemem);
jbe@412 506 conn->todo_PQfreemem = NULL;
jbe@412 507 }
jbe@393 508 notify = PQnotifies(conn->pgconn);
jbe@393 509 if (notify) {
jbe@412 510 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@412 511 conn->todo_PQfreemem = notify;
jbe@412 512 // do Lua operations:
jbe@397 513 lua_pushnil(L);
jbe@393 514 lua_pushstring(L, notify->relname);
jbe@393 515 lua_pushstring(L, notify->extra);
jbe@393 516 lua_pushinteger(L, notify->be_pid);
jbe@412 517 // free memory allocated by PQnotifies:
jbe@393 518 PQfreemem(notify);
jbe@412 519 // avoid double call of PQfreemem later:
jbe@412 520 conn->todo_PQfreemem = NULL;
jbe@397 521 return 4;
jbe@393 522 }
jbe@393 523 }
jbe@393 524 if (infinite) {
jbe@393 525 select(fd+1, &fds, NULL, NULL, NULL);
jbe@393 526 } else if (nonblock) {
jbe@393 527 break;
jbe@393 528 } else {
jbe@393 529 struct timespec tp;
jbe@393 530 struct timeval timeout = { 0, };
jbe@393 531 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@393 532 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 533 }
jbe@393 534 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
jbe@393 535 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
jbe@393 536 if (tp.tv_nsec < 0) {
jbe@393 537 tp.tv_sec -= 1;
jbe@393 538 tp.tv_nsec += 1000000000;
jbe@393 539 }
jbe@393 540 timeout.tv_sec = tp.tv_sec;
jbe@393 541 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
jbe@393 542 if (
jbe@393 543 timeout.tv_sec < 0 ||
jbe@393 544 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
jbe@393 545 ) break;
jbe@393 546 select(fd+1, &fds, NULL, NULL, &timeout);
jbe@393 547 }
jbe@393 548 }
jbe@397 549 lua_pushnil(L);
jbe@397 550 lua_pushnil(L);
jbe@393 551 return 2;
jbe@393 552 }
jbe@393 553
jbe@23 554 // method "create_list" of database handles:
jbe/bsw@0 555 static int mondelefant_conn_create_list(lua_State *L) {
jbe@23 556 // ensure that first argument is a database connection:
jbe/bsw@0 557 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@440 558 // if no second argument is given, use an empty table:
jbe@440 559 if (lua_isnoneornil(L, 2)) {
jbe@440 560 lua_settop(L, 1);
jbe@440 561 lua_newtable(L); // 2
jbe@440 562 } else {
jbe@440 563 luaL_checktype(L, 2, LUA_TTABLE);
jbe@440 564 lua_settop(L, 2);
jbe@440 565 }
jbe@23 566 // set meta-table for database result lists/objects:
jbe@406 567 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 568 // set "_connection" attribute to self:
jbe/bsw@0 569 lua_pushvalue(L, 1); // 3
jbe/bsw@0 570 lua_setfield(L, 2, "_connection");
jbe@23 571 // set "_type" attribute to string "list":
jbe/bsw@0 572 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 573 lua_setfield(L, 2, "_type");
jbe@436 574 // set "_class" attribute to default class:
jbe@436 575 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe@436 576 lua_setfield(L, 2, "_class");
jbe@23 577 // return created database result list:
jbe/bsw@0 578 return 1;
jbe/bsw@0 579 }
jbe/bsw@0 580
jbe@23 581 // method "create_object" of database handles:
jbe/bsw@0 582 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 583 // ensure that first argument is a database connection:
jbe/bsw@0 584 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@436 585 // create new table on stack position 2:
jbe@436 586 lua_settop(L, 1);
jbe@436 587 lua_newtable(L); // 2
jbe@397 588 // set meta-table for database result lists/objects:
jbe@406 589 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 590 // set "_connection" attribute to self:
jbe/bsw@0 591 lua_pushvalue(L, 1); // 3
jbe/bsw@0 592 lua_setfield(L, 2, "_connection");
jbe@23 593 // set "_type" attribute to string "object":
jbe/bsw@0 594 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 595 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@436 596 // set "_class" attribute to default class:
jbe@436 597 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe@436 598 lua_setfield(L, 2, "_class");
jbe@23 599 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 600 lua_newtable(L); // 3
jbe/bsw@0 601 lua_setfield(L, 2, "_data");
jbe/bsw@0 602 lua_newtable(L); // 3
jbe/bsw@0 603 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 604 lua_newtable(L); // 3
jbe/bsw@0 605 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@417 606 // create column proxy (field "_col" in result object):
jbe@416 607 lua_newtable(L); // 3
jbe@416 608 luaL_setmetatable(L, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 609 lua_pushvalue(L, 2); // 4
jbe@416 610 lua_rawsetp(L, 3, MONDELEFANT_COLUMNS_RESULT_LUKEY);
jbe@417 611 lua_setfield(L, 2, "_col");
jbe@416 612 // return created database result object (from stack position 2):
jbe/bsw@0 613 return 1;
jbe/bsw@0 614 }
jbe/bsw@0 615
jbe@23 616 // method "quote_string" of database handles:
jbe/bsw@0 617 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 618 mondelefant_conn_t *conn;
jbe/bsw@0 619 const char *input;
jbe/bsw@0 620 size_t input_len;
jbe@407 621 luaL_Buffer buf;
jbe/bsw@0 622 char *output;
jbe/bsw@0 623 size_t output_len;
jbe@407 624 // get database connection object:
jbe/bsw@0 625 conn = mondelefant_get_conn(L, 1);
jbe@23 626 // get second argument, which must be a string:
jbe/bsw@0 627 input = luaL_checklstring(L, 2, &input_len);
jbe@23 628 // throw error, if string is too long:
jbe/bsw@0 629 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 630 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 631 }
jbe@23 632 // allocate memory for quoted string:
jbe@407 633 output = luaL_buffinitsize(L, &buf, (2 * input_len + 3) * sizeof(char));
jbe@23 634 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 635 // single quotes:
jbe/bsw@0 636 output[0] = '\'';
jbe/bsw@0 637 output_len = PQescapeStringConn(
jbe/bsw@0 638 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 639 );
jbe/bsw@0 640 output[output_len + 1] = '\'';
jbe/bsw@0 641 output[output_len + 2] = 0;
jbe@23 642 // create Lua string:
jbe@407 643 luaL_addsize(&buf, output_len + 2);
jbe@424 644 luaL_pushresult(&buf);
jbe@23 645 // return Lua string:
jbe/bsw@0 646 return 1;
jbe/bsw@0 647 }
jbe/bsw@0 648
jbe@23 649 // method "quote_binary" of database handles:
jbe/bsw@0 650 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 651 mondelefant_conn_t *conn;
jbe/bsw@0 652 const char *input;
jbe/bsw@0 653 size_t input_len;
jbe/bsw@0 654 char *output;
jbe/bsw@0 655 size_t output_len;
jbe/bsw@0 656 luaL_Buffer buf;
jbe@407 657 // get database connection object:
jbe/bsw@0 658 conn = mondelefant_get_conn(L, 1);
jbe@23 659 // get second argument, which must be a string:
jbe/bsw@0 660 input = luaL_checklstring(L, 2, &input_len);
jbe@408 661 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 662 if (conn->todo_PQfreemem) {
jbe@410 663 PQfreemem(conn->todo_PQfreemem);
jbe@410 664 conn->todo_PQfreemem = NULL;
jbe@410 665 }
jbe@23 666 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 667 output = (char *)PQescapeByteaConn(
jbe/bsw@0 668 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 669 );
jbe/bsw@0 670 if (!output) {
jbe@408 671 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@408 672 output = (char *)PQescapeByteaConn(
jbe@408 673 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe@408 674 );
jbe@408 675 if (!output) {
jbe@408 676 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe@408 677 }
jbe/bsw@0 678 }
jbe@412 679 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@408 680 conn->todo_PQfreemem = output;
jbe@23 681 // create Lua string enclosed by single quotes:
jbe/bsw@0 682 luaL_buffinit(L, &buf);
jbe/bsw@0 683 luaL_addchar(&buf, '\'');
jbe/bsw@0 684 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 685 luaL_addchar(&buf, '\'');
jbe/bsw@0 686 luaL_pushresult(&buf);
jbe@23 687 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 688 PQfreemem(output);
jbe@408 689 // avoid double call of PQfreemem later:
jbe@408 690 conn->todo_PQfreemem = NULL;
jbe@23 691 // return Lua string:
jbe/bsw@0 692 return 1;
jbe/bsw@0 693 }
jbe/bsw@0 694
jbe@23 695 // method "assemble_command" of database handles:
jbe/bsw@0 696 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 697 mondelefant_conn_t *conn;
jbe/bsw@0 698 int paramidx = 2;
jbe/bsw@0 699 const char *template;
jbe/bsw@0 700 size_t template_pos = 0;
jbe/bsw@0 701 luaL_Buffer buf;
jbe@407 702 // get database connection object:
jbe/bsw@0 703 conn = mondelefant_get_conn(L, 1);
jbe@23 704 // if second argument is a string, return this string:
jbe@397 705 if (lua_type(L, 2) == LUA_TSTRING) {
jbe@397 706 lua_settop(L, 2);
jbe/bsw@0 707 return 1;
jbe/bsw@0 708 }
jbe@23 709 // if second argument has __tostring meta-method,
jbe@23 710 // then use this method and return its result:
jbe/bsw@0 711 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 712 // otherwise, require that second argument is a table:
jbe/bsw@0 713 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 714 // set stack top:
jbe@397 715 lua_settop(L, 2);
jbe@23 716 // get first element of table, which must be a string:
jbe/bsw@0 717 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 718 luaL_argcheck(L,
jbe/bsw@0 719 lua_isstring(L, 3),
jbe/bsw@0 720 2,
jbe/bsw@0 721 "First entry of SQL command structure is not a string."
jbe/bsw@0 722 );
jbe/bsw@0 723 template = lua_tostring(L, 3);
jbe@23 724 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 725 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 726 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 727 // reserve space on Lua stack:
jbe/bsw@0 728 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 729 lua_pushnil(L); // free space at stack position 6
jbe@23 730 // initialize Lua buffer for result string:
jbe/bsw@0 731 luaL_buffinit(L, &buf);
jbe@23 732 // fill buffer in loop:
jbe/bsw@0 733 while (1) {
jbe@23 734 // variable declaration:
jbe/bsw@0 735 char c;
jbe@23 736 // get next character:
jbe/bsw@0 737 c = template[template_pos++];
jbe@23 738 // break, when character is NULL byte:
jbe/bsw@0 739 if (!c) break;
jbe@23 740 // question-mark and dollar-sign are special characters:
jbe@23 741 if (c == '?' || c == '$') { // special character found
jbe@23 742 // check, if same character follows:
jbe@23 743 if (template[template_pos] == c) { // special character is escaped
jbe@23 744 // consume two characters of input and add one character to buffer:
jbe/bsw@0 745 template_pos++;
jbe/bsw@0 746 luaL_addchar(&buf, c);
jbe@23 747 } else { // special character is not escaped
jbe/bsw@0 748 luaL_Buffer keybuf;
jbe/bsw@0 749 int subcmd;
jbe@23 750 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 751 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 752 subcmd = (c == '$');
jbe@23 753 // read any number of alpha numeric chars or underscores
jbe@23 754 // and store them on Lua stack:
jbe/bsw@0 755 luaL_buffinit(L, &keybuf);
jbe/bsw@0 756 while (1) {
jbe/bsw@0 757 c = template[template_pos];
jbe/bsw@0 758 if (
jbe/bsw@0 759 (c < 'A' || c > 'Z') &&
jbe/bsw@0 760 (c < 'a' || c > 'z') &&
jbe/bsw@0 761 (c < '0' || c > '9') &&
jbe/bsw@0 762 (c != '_')
jbe/bsw@0 763 ) break;
jbe/bsw@0 764 luaL_addchar(&keybuf, c);
jbe/bsw@0 765 template_pos++;
jbe/bsw@0 766 }
jbe/bsw@0 767 luaL_pushresult(&keybuf);
jbe@23 768 // check, if any characters matched:
jbe@64 769 if (lua_rawlen(L, -1)) {
jbe@23 770 // if any alpha numeric chars or underscores were found,
jbe@23 771 // push them on stack as a Lua string and use them to lookup
jbe@23 772 // value from second argument:
jbe/bsw@0 773 lua_pushvalue(L, -1); // save key on stack
jbe@23 774 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 775 } else {
jbe@23 776 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 777 lua_pop(L, 1);
jbe/bsw@0 778 lua_pushnil(L); // put nil on key position
jbe@23 779 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 780 }
jbe@23 781 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 782 // branch according to type of special character ("?" or "$"):
jbe@23 783 if (subcmd) { // dollar-sign
jbe/bsw@0 784 size_t i;
jbe/bsw@0 785 size_t count;
jbe@23 786 // store fetched value (which is supposed to be sub-structure)
jbe@23 787 // on Lua stack position 5 and drop key:
jbe@23 788 lua_replace(L, 5);
jbe@23 789 lua_pop(L, 1);
jbe@23 790 // Lua stack contains: ..., <buffer>
jbe@23 791 // check, if fetched value is really a sub-structure:
jbe/bsw@0 792 luaL_argcheck(L,
jbe/bsw@0 793 !lua_isnil(L, 5),
jbe/bsw@0 794 2,
jbe/bsw@0 795 "SQL sub-structure not found."
jbe/bsw@0 796 );
jbe/bsw@0 797 luaL_argcheck(L,
jbe/bsw@0 798 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 799 2,
jbe/bsw@0 800 "SQL sub-structure must be a table."
jbe/bsw@0 801 );
jbe@23 802 // Lua stack contains: ..., <buffer>
jbe@23 803 // get value of "sep" attribute of sub-structure,
jbe@23 804 // and place it on Lua stack position 6:
jbe/bsw@0 805 lua_getfield(L, 5, "sep");
jbe@23 806 lua_replace(L, 6);
jbe@23 807 // if seperator is nil, then use ", " as default,
jbe@23 808 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 809 if (lua_isnil(L, 6)) {
jbe/bsw@0 810 lua_pushstring(L, ", ");
jbe/bsw@0 811 lua_replace(L, 6);
jbe/bsw@0 812 } else {
jbe/bsw@0 813 luaL_argcheck(L,
jbe/bsw@0 814 lua_isstring(L, 6),
jbe/bsw@0 815 2,
jbe/bsw@0 816 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 817 );
jbe/bsw@0 818 }
jbe@23 819 // iterate over items of sub-structure:
jbe@64 820 count = lua_rawlen(L, 5);
jbe/bsw@0 821 for (i = 0; i < count; i++) {
jbe@23 822 // add seperator, unless this is the first run:
jbe/bsw@0 823 if (i) {
jbe/bsw@0 824 lua_pushvalue(L, 6);
jbe/bsw@0 825 luaL_addvalue(&buf);
jbe/bsw@0 826 }
jbe@23 827 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 828 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 829 lua_pushvalue(L, 1);
jbe/bsw@0 830 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 831 lua_call(L, 2, 1);
jbe/bsw@0 832 luaL_addvalue(&buf);
jbe/bsw@0 833 }
jbe@23 834 } else { // question-mark
jbe/bsw@0 835 if (lua_toboolean(L, 4)) {
jbe@23 836 // call input_converter with connection handle, raw-value and
jbe@23 837 // an info-table which contains a "field_name" entry with the
jbe@23 838 // used key:
jbe/bsw@0 839 lua_pushvalue(L, 4);
jbe/bsw@0 840 lua_pushvalue(L, 1);
jbe/bsw@0 841 lua_pushvalue(L, -3);
jbe/bsw@0 842 lua_newtable(L);
jbe/bsw@0 843 lua_pushvalue(L, -6);
jbe/bsw@0 844 lua_setfield(L, -2, "field_name");
jbe/bsw@0 845 lua_call(L, 3, 1);
jbe@23 846 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 847 // remove key and raw-value:
jbe/bsw@0 848 lua_remove(L, -2);
jbe/bsw@0 849 lua_remove(L, -2);
jbe@23 850 // Lua stack contains: ..., <buffer>, final-value
jbe@23 851 // throw error, if final-value is not a string:
jbe/bsw@0 852 if (!lua_isstring(L, -1)) {
jbe/bsw@0 853 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 854 }
jbe/bsw@0 855 } else {
jbe@23 856 // remove key from stack:
jbe/bsw@0 857 lua_remove(L, -2);
jbe@23 858 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 859 // branch according to type of value:
jbe@408 860 // NOTE: Lua automatically converts numbers to strings
jbe@23 861 if (lua_isnil(L, -1)) { // value is nil
jbe@23 862 // push string "NULL" to stack:
jbe/bsw@0 863 lua_pushliteral(L, "NULL");
jbe@23 864 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 865 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 866 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 867 } else if (lua_isstring(L, -1)) { // value is string or number
jbe@408 868 // push output of "quote_string" method of database connection
jbe@408 869 // to stack:
jbe/bsw@0 870 lua_tostring(L, -1);
jbe/bsw@0 871 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 872 lua_pushvalue(L, 1);
jbe/bsw@0 873 lua_pushvalue(L, -3);
jbe/bsw@0 874 lua_call(L, 2, 1);
jbe@23 875 } else { // value is of other type
jbe@23 876 // throw error:
jbe/bsw@0 877 return luaL_error(L,
jbe/bsw@0 878 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 879 "or missing input_converter."
jbe/bsw@0 880 );
jbe/bsw@0 881 }
jbe@23 882 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 883 // remove raw-value:
jbe/bsw@0 884 lua_remove(L, -2);
jbe@23 885 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 886 }
jbe@23 887 // append final-value to buffer:
jbe/bsw@0 888 luaL_addvalue(&buf);
jbe/bsw@0 889 }
jbe/bsw@0 890 }
jbe@23 891 } else { // character is not special
jbe@23 892 // just copy character:
jbe/bsw@0 893 luaL_addchar(&buf, c);
jbe/bsw@0 894 }
jbe/bsw@0 895 }
jbe@23 896 // return string in buffer:
jbe/bsw@0 897 luaL_pushresult(&buf);
jbe/bsw@0 898 return 1;
jbe/bsw@0 899 }
jbe/bsw@0 900
jbe@23 901 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 902 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 903 // max number of columns in a database result:
jbe/bsw@0 904 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 905 // enum values for 'modes' array in C-function below:
jbe/bsw@0 906 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 907 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 908 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 909
jbe@23 910 // method "try_query" of database handles:
jbe/bsw@0 911 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 912 mondelefant_conn_t *conn;
jbe/bsw@0 913 int command_count;
jbe/bsw@0 914 int command_idx;
jbe/bsw@0 915 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 916 luaL_Buffer buf;
jbe/bsw@0 917 int sent_success;
jbe/bsw@0 918 PGresult *res;
jbe/bsw@0 919 int rows, cols, row, col;
jbe@407 920 // get database connection object:
jbe/bsw@0 921 conn = mondelefant_get_conn(L, 1);
jbe@23 922 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 923 command_count = lua_gettop(L) / 2;
jbe@23 924 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 925 lua_pushnil(L);
jbe@23 926 // throw error, if number of commands is too high:
jbe/bsw@0 927 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 928 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 929 }
jbe@23 930 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 931 luaL_buffinit(L, &buf);
jbe/bsw@0 932 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 933 int mode;
jbe/bsw@0 934 int mode_idx; // stack index of mode string
jbe/bsw@0 935 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 936 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 937 lua_pushvalue(L, 1);
jbe/bsw@0 938 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 939 lua_call(L, 2, 1);
jbe/bsw@0 940 luaL_addvalue(&buf);
jbe/bsw@0 941 luaL_addchar(&buf, ';');
jbe/bsw@0 942 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 943 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 944 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 945 } else {
jbe/bsw@0 946 const char *modestr;
jbe/bsw@0 947 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 948 if (!strcmp(modestr, "list")) {
jbe/bsw@0 949 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 950 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 951 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 952 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 953 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 954 } else {
jbe@397 955 return luaL_argerror(L, mode_idx, "unknown query mode");
jbe/bsw@0 956 }
jbe/bsw@0 957 }
jbe/bsw@0 958 modes[command_idx] = mode;
jbe/bsw@0 959 }
jbe/bsw@0 960 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 961 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 962 // call sql_tracer, if set:
jbe/bsw@0 963 lua_settop(L, 2);
jbe/bsw@0 964 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 965 if (lua_toboolean(L, 3)) {
jbe/bsw@0 966 lua_pushvalue(L, 1); // 4
jbe/bsw@0 967 lua_pushvalue(L, 2); // 5
jbe/bsw@0 968 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 969 }
jbe@23 970 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 971 // position 3.
jbe@23 972 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 973 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 974 // create preliminary result table:
jbe/bsw@0 975 lua_newtable(L); // results in table at stack position 4
jbe@23 976 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 977 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 978 int mode;
jbe/bsw@0 979 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 980 ExecStatusType pgstatus;
jbe@23 981 // fetch mode which was given for the command:
jbe/bsw@0 982 mode = modes[command_idx];
jbe@23 983 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 984 if (sent_success) {
jbe@408 985 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 986 if (conn->todo_PQclear) {
jbe@410 987 PQclear(conn->todo_PQclear);
jbe@410 988 conn->todo_PQclear = NULL;
jbe@410 989 }
jbe@23 990 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 991 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 992 res = PQgetResult(conn->pgconn);
jbe/bsw@0 993 if (command_idx >= command_count && !res) break;
jbe/bsw@0 994 if (res) {
jbe/bsw@0 995 pgstatus = PQresultStatus(res);
jbe/bsw@0 996 rows = PQntuples(res);
jbe/bsw@0 997 cols = PQnfields(res);
jbe@412 998 // ensure call of PQclear in case of Lua errors:
jbe@408 999 conn->todo_PQclear = res;
jbe/bsw@0 1000 }
jbe/bsw@0 1001 }
jbe@23 1002 // handle errors:
jbe/bsw@0 1003 if (
jbe/bsw@0 1004 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 1005 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 1006 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 1007 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 1008 ) {
jbe/bsw@0 1009 const char *command;
jbe/bsw@0 1010 command = lua_tostring(L, 2);
jbe/bsw@0 1011 lua_newtable(L); // 5
jbe@406 1012 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 1013 lua_pushvalue(L, 1);
jbe/bsw@0 1014 lua_setfield(L, 5, "connection");
jbe/bsw@0 1015 lua_pushvalue(L, 2);
jbe/bsw@0 1016 lua_setfield(L, 5, "sql_command");
jbe@397 1017 if (!sent_success) {
jbe@397 1018 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 1019 lua_setfield(L, 5, "code");
jbe@397 1020 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe/bsw@0 1021 lua_setfield(L, 5, "message");
jbe/bsw@0 1022 } else {
jbe@397 1023 lua_pushinteger(L, command_idx + 1);
jbe@397 1024 lua_setfield(L, 5, "command_number");
jbe@397 1025 if (!res) {
jbe@397 1026 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe@397 1027 lua_setfield(L, 5, "code");
jbe@397 1028 lua_pushliteral(L, "Received too few database result sets.");
jbe@397 1029 lua_setfield(L, 5, "message");
jbe@397 1030 } else if (command_idx >= command_count) {
jbe@397 1031 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe@397 1032 lua_setfield(L, 5, "code");
jbe@397 1033 lua_pushliteral(L, "Received too many database result sets.");
jbe@397 1034 lua_setfield(L, 5, "message");
jbe@397 1035 } else if (
jbe@397 1036 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe@397 1037 ) {
jbe@397 1038 const char *sqlstate;
jbe@397 1039 const char *errmsg;
jbe@397 1040 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe@397 1041 lua_setfield(L, 5, "pg_severity");
jbe@397 1042 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe@397 1043 if (sqlstate) {
jbe@397 1044 lua_pushstring(L, sqlstate);
jbe@397 1045 lua_setfield(L, 5, "pg_sqlstate");
jbe@397 1046 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe@397 1047 lua_setfield(L, 5, "code");
jbe@397 1048 } else {
jbe@397 1049 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe@397 1050 lua_setfield(L, 5, "code");
jbe@397 1051 }
jbe@397 1052 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe@397 1053 if (errmsg) {
jbe@397 1054 mondelefant_push_first_line(L, errmsg);
jbe@397 1055 lua_setfield(L, 5, "message");
jbe@397 1056 lua_pushstring(L, errmsg);
jbe@397 1057 lua_setfield(L, 5, "pg_message_primary");
jbe@397 1058 } else {
jbe@397 1059 lua_pushliteral(L,
jbe@397 1060 "Error while fetching result, but no error message given."
jbe@397 1061 );
jbe@397 1062 lua_setfield(L, 5, "message");
jbe@397 1063 }
jbe@397 1064 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe@397 1065 lua_setfield(L, 5, "pg_message_detail");
jbe@397 1066 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe@397 1067 lua_setfield(L, 5, "pg_message_hint");
jbe@397 1068 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe@397 1069 // byte offsets, as Lua 5.2 is not Unicode aware.
jbe@397 1070 {
jbe@397 1071 char *tmp;
jbe@397 1072 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe@397 1073 if (tmp) {
jbe@397 1074 int pos;
jbe@397 1075 pos = atoi(tmp) - 1;
jbe@397 1076 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1077 pos = utf8_position_to_byte(command, pos);
jbe@397 1078 }
jbe@397 1079 lua_pushinteger(L, pos + 1);
jbe@397 1080 lua_setfield(L, 5, "position");
jbe@397 1081 }
jbe@397 1082 }
jbe@397 1083 {
jbe@397 1084 const char *internal_query;
jbe@397 1085 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe@397 1086 lua_pushstring(L, internal_query);
jbe@397 1087 lua_setfield(L, 5, "pg_internal_query");
jbe@397 1088 char *tmp;
jbe@397 1089 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe@397 1090 if (tmp) {
jbe@397 1091 int pos;
jbe@397 1092 pos = atoi(tmp) - 1;
jbe@397 1093 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1094 pos = utf8_position_to_byte(internal_query, pos);
jbe@397 1095 }
jbe@397 1096 lua_pushinteger(L, pos + 1);
jbe@397 1097 lua_setfield(L, 5, "pg_internal_position");
jbe@397 1098 }
jbe@397 1099 }
jbe@397 1100 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe@397 1101 lua_setfield(L, 5, "pg_context");
jbe@397 1102 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe@397 1103 lua_setfield(L, 5, "pg_source_file");
jbe@397 1104 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe@397 1105 lua_setfield(L, 5, "pg_source_line");
jbe@397 1106 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe@397 1107 lua_setfield(L, 5, "pg_source_function");
jbe@397 1108 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe@397 1109 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe@397 1110 lua_setfield(L, 5, "code");
jbe@397 1111 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe@397 1112 lua_setfield(L, 5, "message");
jbe@397 1113 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe@397 1114 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe@397 1115 lua_setfield(L, 5, "code");
jbe@397 1116 lua_pushliteral(L, "Got more than one result row.");
jbe@397 1117 lua_setfield(L, 5, "message");
jbe@397 1118 } else {
jbe@397 1119 // should not happen
jbe@397 1120 abort();
jbe@397 1121 }
jbe@397 1122 if (res) {
jbe@397 1123 PQclear(res);
jbe@397 1124 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe@408 1125 // avoid double call of PQclear later:
jbe@408 1126 conn->todo_PQclear = NULL;
jbe@397 1127 }
jbe/bsw@0 1128 }
jbe/bsw@0 1129 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1130 lua_pushvalue(L, 3);
jbe/bsw@0 1131 lua_pushvalue(L, 5);
jbe/bsw@0 1132 lua_call(L, 1, 0);
jbe/bsw@0 1133 }
jbe/bsw@0 1134 return 1;
jbe/bsw@0 1135 }
jbe@23 1136 // call "create_list" or "create_object" method of database handle,
jbe@23 1137 // result will be at stack position 5:
jbe/bsw@0 1138 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1139 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1140 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1141 lua_call(L, 1, 1); // 5
jbe/bsw@0 1142 } else {
jbe/bsw@0 1143 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1144 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1145 lua_call(L, 1, 1); // 5
jbe/bsw@0 1146 }
jbe@23 1147 // set "_column_info":
jbe@23 1148 lua_newtable(L); // 6
jbe/bsw@0 1149 for (col = 0; col < cols; col++) {
jbe/bsw@0 1150 lua_newtable(L); // 7
jbe@380 1151 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1152 lua_pushvalue(L, 8); // 9
jbe@380 1153 lua_pushvalue(L, 7); // 10
jbe@380 1154 lua_rawset(L, 6);
jbe/bsw@0 1155 lua_setfield(L, 7, "field_name");
jbe@380 1156 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1157 {
jbe/bsw@0 1158 Oid tmp;
jbe/bsw@0 1159 tmp = PQftable(res, col);
jbe/bsw@0 1160 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1161 else lua_pushinteger(L, tmp);
jbe/bsw@0 1162 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1163 }
jbe/bsw@0 1164 {
jbe/bsw@0 1165 int tmp;
jbe/bsw@0 1166 tmp = PQftablecol(res, col);
jbe/bsw@0 1167 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1168 else lua_pushinteger(L, tmp);
jbe/bsw@0 1169 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1170 }
jbe/bsw@0 1171 {
jbe/bsw@0 1172 Oid tmp;
jbe/bsw@0 1173 tmp = PQftype(res, col);
jbe/bsw@0 1174 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1175 lua_pushinteger(L, tmp);
jbe/bsw@0 1176 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1177 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1178 lua_setfield(L, 7, "type");
jbe/bsw@0 1179 }
jbe/bsw@0 1180 {
jbe/bsw@0 1181 int tmp;
jbe/bsw@0 1182 tmp = PQfmod(res, col);
jbe/bsw@0 1183 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1184 else lua_pushinteger(L, tmp);
jbe/bsw@0 1185 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1186 }
jbe/bsw@0 1187 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1188 }
jbe@23 1189 lua_setfield(L, 5, "_column_info");
jbe@23 1190 // set "_rows_affected":
jbe/bsw@0 1191 {
jbe/bsw@0 1192 char *tmp;
jbe/bsw@0 1193 tmp = PQcmdTuples(res);
jbe/bsw@0 1194 if (tmp[0]) {
jbe/bsw@0 1195 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1196 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1197 }
jbe/bsw@0 1198 }
jbe@23 1199 // set "_oid":
jbe/bsw@0 1200 {
jbe/bsw@0 1201 Oid tmp;
jbe/bsw@0 1202 tmp = PQoidValue(res);
jbe/bsw@0 1203 if (tmp != InvalidOid) {
jbe/bsw@0 1204 lua_pushinteger(L, tmp);
jbe/bsw@0 1205 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1206 }
jbe/bsw@0 1207 }
jbe@23 1208 // copy data as strings or nil, while performing binary unescaping
jbe@23 1209 // automatically:
jbe/bsw@0 1210 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1211 for (row = 0; row < rows; row++) {
jbe/bsw@0 1212 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1213 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1214 lua_call(L, 1, 1); // 6
jbe/bsw@0 1215 for (col = 0; col < cols; col++) {
jbe/bsw@0 1216 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1217 lua_pushnil(L);
jbe/bsw@0 1218 } else if (binary[col]) {
jbe/bsw@0 1219 size_t binlen;
jbe/bsw@0 1220 char *binval;
jbe@412 1221 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1222 if (conn->todo_PQfreemem) {
jbe@412 1223 PQfreemem(conn->todo_PQfreemem);
jbe@412 1224 conn->todo_PQfreemem = NULL;
jbe@412 1225 }
jbe@412 1226 // Unescape binary data:
jbe/bsw@0 1227 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1228 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1229 );
jbe/bsw@0 1230 if (!binval) {
jbe/bsw@0 1231 return luaL_error(L,
jbe/bsw@0 1232 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1233 );
jbe/bsw@0 1234 }
jbe@412 1235 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1236 conn->todo_PQfreemem = binval;
jbe@412 1237 // create Lua string:
jbe/bsw@0 1238 lua_pushlstring(L, binval, binlen);
jbe@412 1239 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1240 PQfreemem(binval);
jbe@412 1241 // avoid double call of PQfreemem later:
jbe@412 1242 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1243 } else {
jbe/bsw@0 1244 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1245 }
jbe/bsw@0 1246 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1247 }
jbe/bsw@0 1248 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1249 }
jbe/bsw@0 1250 } else if (rows == 1) {
jbe/bsw@0 1251 for (col = 0; col < cols; col++) {
jbe/bsw@0 1252 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1253 lua_pushnil(L);
jbe/bsw@0 1254 } else if (binary[col]) {
jbe/bsw@0 1255 size_t binlen;
jbe/bsw@0 1256 char *binval;
jbe@412 1257 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1258 if (conn->todo_PQfreemem) {
jbe@412 1259 PQfreemem(conn->todo_PQfreemem);
jbe@412 1260 conn->todo_PQfreemem = NULL;
jbe@412 1261 }
jbe@412 1262 // Unescape binary data:
jbe/bsw@0 1263 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1264 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1265 );
jbe/bsw@0 1266 if (!binval) {
jbe/bsw@0 1267 return luaL_error(L,
jbe/bsw@0 1268 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1269 );
jbe/bsw@0 1270 }
jbe@412 1271 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1272 conn->todo_PQfreemem = binval;
jbe@412 1273 // create Lua string:
jbe/bsw@0 1274 lua_pushlstring(L, binval, binlen);
jbe@412 1275 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1276 PQfreemem(binval);
jbe@412 1277 // avoid double call of PQfreemem later:
jbe@412 1278 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1279 } else {
jbe/bsw@0 1280 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1281 }
jbe/bsw@0 1282 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1283 }
jbe/bsw@0 1284 } else {
jbe/bsw@0 1285 // no row in optrow mode
jbe/bsw@0 1286 lua_pop(L, 1);
jbe/bsw@0 1287 lua_pushnil(L);
jbe/bsw@0 1288 }
jbe@23 1289 // save result in result list:
jbe/bsw@0 1290 lua_rawseti(L, 4, command_idx+1);
jbe@23 1291 // extra assertion:
jbe/bsw@0 1292 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1293 // free memory acquired by libpq:
jbe/bsw@0 1294 PQclear(res);
jbe@408 1295 // avoid double call of PQclear later:
jbe@408 1296 conn->todo_PQclear = NULL;
jbe/bsw@0 1297 }
jbe/bsw@0 1298 // trace callback at stack position 3
jbe/bsw@0 1299 // result at stack position 4 (top of stack)
jbe@23 1300 // if a trace callback is existent, then call:
jbe/bsw@0 1301 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1302 lua_pushvalue(L, 3);
jbe/bsw@0 1303 lua_call(L, 0, 0);
jbe/bsw@0 1304 }
jbe@23 1305 // put result at stack position 3:
jbe@23 1306 lua_replace(L, 3);
jbe@23 1307 // get output converter to stack position 4:
jbe@23 1308 lua_getfield(L, 1, "output_converter");
jbe@374 1309 // get mutability state saver to stack position 5:
jbe@375 1310 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1311 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1312 lua_replace(L, -2);
jbe@23 1313 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1314 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1315 int mode;
jbe/bsw@0 1316 mode = modes[command_idx];
jbe@374 1317 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1318 if (lua_toboolean(L, 6)) {
jbe@374 1319 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@374 1320 cols = lua_rawlen(L, 7);
jbe/bsw@0 1321 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@374 1322 rows = lua_rawlen(L, 6);
jbe/bsw@0 1323 for (row = 0; row < rows; row++) {
jbe@374 1324 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1325 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1326 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1327 for (col = 0; col < cols; col++) {
jbe@375 1328 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1329 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1330 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1331 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1332 lua_pushvalue(L, 1); // connection
jbe@374 1333 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1334 lua_pushvalue(L, 11); // this column info
jbe@375 1335 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1336 } else {
jbe@375 1337 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1338 }
jbe@375 1339 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1340 lua_pushvalue(L, 12); // copy of field name
jbe@375 1341 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1342 lua_pushvalue(L, 13); // copy of value
jbe@375 1343 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1344 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1345 }
jbe@375 1346 lua_pushvalue(L, 13); // 14
jbe@374 1347 lua_rawseti(L, 8, col+1);
jbe@374 1348 lua_rawset(L, 9);
jbe@399 1349 lua_settop(L, 10);
jbe/bsw@0 1350 }
jbe@374 1351 lua_settop(L, 7);
jbe/bsw@0 1352 }
jbe/bsw@0 1353 } else {
jbe@374 1354 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1355 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1356 for (col = 0; col < cols; col++) {
jbe@375 1357 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1358 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1359 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1360 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1361 lua_pushvalue(L, 1); // connection
jbe@374 1362 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1363 lua_pushvalue(L, 10); // this column info
jbe@375 1364 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1365 } else {
jbe@375 1366 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1367 }
jbe@375 1368 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1369 lua_pushvalue(L, 11); // copy of field name
jbe@375 1370 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1371 lua_pushvalue(L, 12); // copy of value
jbe@375 1372 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1373 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1374 }
jbe@375 1375 lua_pushvalue(L, 12); // 13
jbe@374 1376 lua_rawseti(L, 6, col+1);
jbe@374 1377 lua_rawset(L, 8);
jbe@399 1378 lua_settop(L, 9);
jbe/bsw@0 1379 }
jbe/bsw@0 1380 }
jbe/bsw@0 1381 }
jbe@374 1382 lua_settop(L, 5);
jbe/bsw@0 1383 }
jbe@23 1384 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1385 lua_settop(L, 3);
jbe/bsw@0 1386 lua_pushnil(L);
jbe/bsw@0 1387 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1388 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1389 }
jbe/bsw@0 1390 return command_count+1;
jbe/bsw@0 1391 }
jbe/bsw@0 1392
jbe@472 1393 // meta-method "__tostring" of error objects:
jbe@472 1394 static int mondelefant_errorobject_tostring(lua_State *L) {
jbe@472 1395 const char *errclass;
jbe@472 1396 const char *errmsg;
jbe@472 1397 luaL_checktype(L, 1, LUA_TTABLE);
jbe@472 1398 lua_settop(L, 1);
jbe@472 1399 lua_getfield(L, 1, "code"); // 2
jbe@472 1400 lua_getfield(L, 1, "message"); // 3
jbe@472 1401 errclass = lua_tostring(L, 2);
jbe@472 1402 errmsg = lua_tostring(L, 3);
jbe@472 1403 if (!errclass) errclass = "(null)";
jbe@472 1404 if (!errmsg) errclass = "(null)";
jbe@472 1405 lua_pushfstring(L, "database error of class \"%s\": %s", errclass, errmsg);
jbe@472 1406 return 1;
jbe@472 1407 }
jbe@472 1408
jbe@397 1409 // method "is_kind_of" of error objects:
jbe@397 1410 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe@397 1411 const char *errclass;
jbe@397 1412 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1413 errclass = luaL_checkstring(L, 2);
jbe@397 1414 lua_settop(L, 2);
jbe@397 1415 lua_getfield(L, 1, "code"); // 3
jbe@397 1416 luaL_argcheck(L,
jbe@397 1417 lua_type(L, 3) == LUA_TSTRING,
jbe@397 1418 1,
jbe@397 1419 "field 'code' of error object is not a string"
jbe@397 1420 );
jbe@397 1421 lua_pushboolean(L,
jbe@397 1422 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
jbe@397 1423 );
jbe@397 1424 return 1;
jbe@397 1425 }
jbe@397 1426
jbe@397 1427 // method "wait" of database handles:
jbe@397 1428 static int mondelefant_conn_wait(lua_State *L) {
jbe@397 1429 int argc;
jbe@397 1430 // count number of arguments:
jbe@397 1431 argc = lua_gettop(L);
jbe@397 1432 // insert "try_wait" function/method at stack position 1:
jbe@397 1433 lua_pushcfunction(L, mondelefant_conn_try_wait);
jbe@397 1434 lua_insert(L, 1);
jbe@397 1435 // call "try_wait" method:
jbe@397 1436 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@397 1437 // check, if error occurred:
jbe@397 1438 if (lua_toboolean(L, 1)) {
jbe@397 1439 // raise error
jbe/bsw@0 1440 lua_settop(L, 1);
jbe/bsw@0 1441 return lua_error(L);
jbe/bsw@0 1442 } else {
jbe@397 1443 // return everything but nil error object:
jbe@397 1444 return lua_gettop(L) - 1;
jbe/bsw@0 1445 }
jbe/bsw@0 1446 }
jbe/bsw@0 1447
jbe@23 1448 // method "query" of database handles:
jbe/bsw@0 1449 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1450 int argc;
jbe@23 1451 // count number of arguments:
jbe/bsw@0 1452 argc = lua_gettop(L);
jbe@23 1453 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1454 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1455 lua_insert(L, 1);
jbe@23 1456 // call "try_query" method:
jbe@23 1457 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1458 // check, if error occurred:
jbe@23 1459 if (lua_toboolean(L, 1)) {
jbe@397 1460 // raise error
jbe@397 1461 lua_settop(L, 1);
jbe@397 1462 return lua_error(L);
jbe/bsw@0 1463 } else {
jbe@23 1464 // return everything but nil error object:
jbe@23 1465 return lua_gettop(L) - 1;
jbe/bsw@0 1466 }
jbe/bsw@0 1467 }
jbe/bsw@0 1468
jbe@23 1469 // library function "set_class":
jbe/bsw@0 1470 static int mondelefant_set_class(lua_State *L) {
jbe@23 1471 // ensure that first argument is a database result list/object:
jbe/bsw@0 1472 lua_settop(L, 2);
jbe/bsw@0 1473 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1474 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1475 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@23 1476 // ensure that second argument is a database class (model):
jbe/bsw@0 1477 lua_settop(L, 2);
jbe/bsw@0 1478 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1479 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1480 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@23 1481 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1482 lua_settop(L, 2);
jbe/bsw@0 1483 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1484 lua_setfield(L, 1, "_class");
jbe@23 1485 // test, if database result is a list (and not a single object):
jbe/bsw@0 1486 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1487 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1488 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1489 int i;
jbe@23 1490 // set attribute "_class" of all elements to given class:
jbe@64 1491 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe/bsw@0 1492 lua_settop(L, 2);
jbe/bsw@0 1493 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1494 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1495 lua_setfield(L, 3, "_class");
jbe/bsw@0 1496 }
jbe/bsw@0 1497 }
jbe@23 1498 // return first argument:
jbe/bsw@0 1499 lua_settop(L, 1);
jbe/bsw@0 1500 return 1;
jbe/bsw@0 1501 }
jbe/bsw@0 1502
jbe@23 1503 // library function "new_class":
jbe/bsw@0 1504 static int mondelefant_new_class(lua_State *L) {
jbe@397 1505 // if no argument is given, use an empty table:
jbe@397 1506 if (lua_isnoneornil(L, 1)) {
jbe/bsw@0 1507 lua_settop(L, 0);
jbe/bsw@0 1508 lua_newtable(L); // 1
jbe@397 1509 } else {
jbe@397 1510 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1511 lua_settop(L, 1);
jbe/bsw@0 1512 }
jbe@23 1513 // set meta-table for database classes (models):
jbe@406 1514 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
jbe@23 1515 // check, if "prototype" attribute is not set:
jbe/bsw@0 1516 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1517 lua_rawget(L, 1); // 2
jbe/bsw@0 1518 if (!lua_toboolean(L, 2)) {
jbe@23 1519 // set "prototype" attribute to default prototype:
jbe/bsw@0 1520 lua_pushliteral(L, "prototype"); // 3
jbe@413 1521 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1522 lua_rawset(L, 1);
jbe/bsw@0 1523 }
jbe@23 1524 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1525 lua_settop(L, 1);
jbe/bsw@0 1526 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1527 lua_rawget(L, 1); // 2
jbe/bsw@0 1528 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1529 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1530 lua_newtable(L); // 4
jbe/bsw@0 1531 lua_rawset(L, 1);
jbe/bsw@0 1532 }
jbe@23 1533 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1534 lua_settop(L, 1);
jbe/bsw@0 1535 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1536 lua_rawget(L, 1); // 2
jbe/bsw@0 1537 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1538 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1539 lua_newtable(L); // 4
jbe/bsw@0 1540 lua_rawset(L, 1);
jbe/bsw@0 1541 }
jbe@23 1542 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1543 lua_settop(L, 1);
jbe/bsw@0 1544 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1545 lua_rawget(L, 1); // 2
jbe/bsw@0 1546 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1547 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1548 lua_newtable(L); // 4
jbe/bsw@0 1549 lua_rawset(L, 1);
jbe/bsw@0 1550 }
jbe@23 1551 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1552 lua_settop(L, 1);
jbe/bsw@0 1553 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1554 lua_rawget(L, 1); // 2
jbe/bsw@0 1555 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1556 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1557 lua_newtable(L); // 4
jbe/bsw@0 1558 lua_rawset(L, 1);
jbe/bsw@0 1559 }
jbe@23 1560 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1561 lua_settop(L, 1);
jbe/bsw@0 1562 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1563 lua_rawget(L, 1); // 2
jbe/bsw@0 1564 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1565 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1566 lua_newtable(L); // 4
jbe/bsw@0 1567 lua_rawset(L, 1);
jbe/bsw@0 1568 }
jbe@23 1569 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1570 lua_settop(L, 1);
jbe/bsw@0 1571 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1572 lua_rawget(L, 1); // 2
jbe/bsw@0 1573 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1574 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1575 lua_newtable(L); // 4
jbe/bsw@0 1576 lua_rawset(L, 1);
jbe/bsw@0 1577 }
jbe@23 1578 // return table:
jbe/bsw@0 1579 lua_settop(L, 1);
jbe/bsw@0 1580 return 1;
jbe/bsw@0 1581 }
jbe/bsw@0 1582
jbe@23 1583 // method "get_reference" of classes (models):
jbe/bsw@0 1584 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1585 lua_settop(L, 2);
jbe/bsw@0 1586 while (lua_toboolean(L, 1)) {
jbe@23 1587 // get "references" table:
jbe/bsw@0 1588 lua_getfield(L, 1, "references"); // 3
jbe@23 1589 // perform lookup:
jbe/bsw@0 1590 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1591 lua_gettable(L, 3); // 4
jbe@23 1592 // return result, if lookup was successful:
jbe/bsw@0 1593 if (!lua_isnil(L, 4)) return 1;
jbe@23 1594 // replace current table by its prototype:
jbe/bsw@0 1595 lua_settop(L, 2);
jbe/bsw@0 1596 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1597 lua_rawget(L, 1); // 3
jbe/bsw@0 1598 lua_replace(L, 1);
jbe/bsw@0 1599 }
jbe@23 1600 // return nothing:
jbe/bsw@0 1601 return 0;
jbe/bsw@0 1602 }
jbe/bsw@0 1603
jbe@23 1604 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1605 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1606 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1607 }
jbe/bsw@0 1608
jbe@23 1609 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1610 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1611 lua_settop(L, 2);
jbe/bsw@0 1612 while (lua_toboolean(L, 1)) {
jbe@23 1613 // get "foreign_keys" table:
jbe/bsw@0 1614 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1615 // perform lookup:
jbe/bsw@0 1616 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1617 lua_gettable(L, 3); // 4
jbe@23 1618 // return result, if lookup was successful:
jbe/bsw@0 1619 if (!lua_isnil(L, 4)) return 1;
jbe@23 1620 // replace current table by its prototype:
jbe/bsw@0 1621 lua_settop(L, 2);
jbe/bsw@0 1622 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1623 lua_rawget(L, 1); // 3
jbe/bsw@0 1624 lua_replace(L, 1);
jbe/bsw@0 1625 }
jbe@23 1626 // return nothing:
jbe/bsw@0 1627 return 0;
jbe/bsw@0 1628 }
jbe/bsw@0 1629
jbe@23 1630 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1631 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1632 const char *result_type;
jbe@23 1633 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1634 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1635 return 0;
jbe/bsw@0 1636 }
jbe@436 1637 // class on stack position 3:
jbe@23 1638 lua_settop(L, 2);
jbe/bsw@0 1639 lua_getfield(L, 1, "_class"); // 3
jbe@23 1640 // get value of "_type" attribute:
jbe/bsw@0 1641 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1642 result_type = lua_tostring(L, 4);
jbe@23 1643 // different lookup for lists and objects:
jbe@23 1644 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1645 lua_settop(L, 3);
jbe@384 1646 // try inherited attributes, methods or getter functions:
jbe@383 1647 lua_pushvalue(L, 3); // 4
jbe@383 1648 while (lua_toboolean(L, 4)) {
jbe@383 1649 lua_getfield(L, 4, "object"); // 5
jbe@383 1650 lua_pushvalue(L, 2); // 6
jbe@383 1651 lua_gettable(L, 5); // 6
jbe@383 1652 if (!lua_isnil(L, 6)) return 1;
jbe@383 1653 lua_settop(L, 4);
jbe@383 1654 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1655 lua_pushvalue(L, 2); // 6
jbe@383 1656 lua_gettable(L, 5); // 6
jbe@383 1657 if (lua_toboolean(L, 6)) {
jbe@383 1658 lua_pushvalue(L, 1); // 7
jbe@383 1659 lua_call(L, 1, 1); // 6
jbe/bsw@0 1660 return 1;
jbe/bsw@0 1661 }
jbe@383 1662 lua_settop(L, 4);
jbe@383 1663 lua_pushliteral(L, "prototype"); // 5
jbe@383 1664 lua_rawget(L, 4); // 5
jbe@383 1665 lua_replace(L, 4);
jbe/bsw@0 1666 }
jbe@383 1667 lua_settop(L, 3);
jbe/bsw@0 1668 // try primary keys of referenced objects:
jbe/bsw@0 1669 lua_pushcfunction(L,
jbe/bsw@0 1670 mondelefant_class_get_foreign_key_reference_name
jbe@383 1671 ); // 4
jbe@383 1672 lua_pushvalue(L, 3); // 5
jbe@383 1673 lua_pushvalue(L, 2); // 6
jbe@383 1674 lua_call(L, 2, 1); // 4
jbe@383 1675 if (!lua_isnil(L, 4)) {
jbe@383 1676 // reference name at stack position 4
jbe@383 1677 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1678 lua_pushvalue(L, 3); // 6
jbe@383 1679 lua_pushvalue(L, 4); // 7
jbe@383 1680 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1681 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1682 lua_getfield(L, 5, "ref"); // 7
jbe@383 1683 lua_gettable(L, 6); // 7
jbe@383 1684 if (!lua_isnil(L, 7)) {
jbe@383 1685 if (lua_toboolean(L, 7)) {
jbe@383 1686 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1687 if (lua_isnil(L, 8)) {
jbe/bsw@0 1688 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1689 }
jbe@383 1690 lua_gettable(L, 7); // 8
jbe/bsw@0 1691 } else {
jbe/bsw@0 1692 lua_pushnil(L);
jbe/bsw@0 1693 }
jbe/bsw@0 1694 return 1;
jbe/bsw@0 1695 }
jbe/bsw@0 1696 }
jbe@383 1697 lua_settop(L, 3);
jbe@383 1698 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1699 // try cached referenced object (or cached NULL reference):
jbe@383 1700 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1701 lua_pushvalue(L, 2); // 6
jbe@383 1702 lua_gettable(L, 5); // 6
jbe@383 1703 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1704 lua_pushnil(L);
jbe/bsw@0 1705 return 1;
jbe@383 1706 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1707 return 1;
jbe/bsw@0 1708 }
jbe@383 1709 lua_settop(L, 4);
jbe/bsw@0 1710 // try to load a referenced object:
jbe@383 1711 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1712 lua_pushvalue(L, 3); // 6
jbe@383 1713 lua_pushvalue(L, 2); // 7
jbe@383 1714 lua_call(L, 2, 1); // 5
jbe@383 1715 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1716 lua_settop(L, 2);
jbe/bsw@0 1717 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1718 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1719 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1720 lua_call(L, 2, 0);
jbe/bsw@0 1721 lua_settop(L, 2);
jbe/bsw@0 1722 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1723 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1724 lua_gettable(L, 3); // 4
jbe/bsw@0 1725 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1726 return 1;
jbe/bsw@0 1727 }
jbe@383 1728 lua_settop(L, 4);
jbe@415 1729 // check if proxy access to document in special column is enabled:
jbe@383 1730 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1731 if (lua_toboolean(L, 5)) {
jbe@415 1732 // if yes, then proxy access:
jbe@383 1733 lua_gettable(L, 4); // 5
jbe@383 1734 if (!lua_isnil(L, 5)) {
jbe@383 1735 lua_pushvalue(L, 2); // 6
jbe@383 1736 lua_gettable(L, 5); // 6
jbe@383 1737 }
jbe@415 1738 } else {
jbe@415 1739 // else use _data table:
jbe@415 1740 lua_pushvalue(L, 2); // 6
jbe@415 1741 lua_gettable(L, 4); // 6
jbe@383 1742 }
jbe@415 1743 return 1; // return element at stack position 5 or 6
jbe@23 1744 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1745 lua_settop(L, 3);
jbe/bsw@0 1746 // try inherited list attributes or methods:
jbe/bsw@0 1747 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1748 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1749 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1750 lua_gettable(L, 4); // 5
jbe/bsw@0 1751 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1752 lua_settop(L, 3);
jbe/bsw@0 1753 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1754 lua_rawget(L, 3); // 4
jbe/bsw@0 1755 lua_replace(L, 3);
jbe/bsw@0 1756 }
jbe/bsw@0 1757 }
jbe@23 1758 // return nothing:
jbe/bsw@0 1759 return 0;
jbe/bsw@0 1760 }
jbe/bsw@0 1761
jbe@23 1762 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1763 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1764 const char *result_type;
jbe@23 1765 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1766 lua_settop(L, 3);
jbe/bsw@0 1767 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1768 lua_rawset(L, 1);
jbe/bsw@0 1769 return 1;
jbe/bsw@0 1770 }
jbe@436 1771 // class on stack position 4:
jbe@384 1772 lua_settop(L, 3);
jbe/bsw@0 1773 lua_getfield(L, 1, "_class"); // 4
jbe@23 1774 // get value of "_type" attribute:
jbe/bsw@0 1775 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1776 result_type = lua_tostring(L, 5);
jbe@378 1777 // distinguish between lists and objects:
jbe@378 1778 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1779 lua_settop(L, 4);
jbe@378 1780 // try object setter functions:
jbe@384 1781 lua_pushvalue(L, 4); // 5
jbe@384 1782 while (lua_toboolean(L, 5)) {
jbe@384 1783 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1784 lua_pushvalue(L, 2); // 7
jbe@384 1785 lua_gettable(L, 6); // 7
jbe@384 1786 if (lua_toboolean(L, 7)) {
jbe@384 1787 lua_pushvalue(L, 1); // 8
jbe@384 1788 lua_pushvalue(L, 3); // 9
jbe@378 1789 lua_call(L, 2, 0);
jbe@378 1790 return 0;
jbe@378 1791 }
jbe@384 1792 lua_settop(L, 5);
jbe@384 1793 lua_pushliteral(L, "prototype"); // 6
jbe@384 1794 lua_rawget(L, 5); // 6
jbe@384 1795 lua_replace(L, 5);
jbe@378 1796 }
jbe@384 1797 lua_settop(L, 4);
jbe@384 1798 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1799 // check, if a object reference is changed:
jbe@384 1800 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1801 lua_pushvalue(L, 4); // 7
jbe@384 1802 lua_pushvalue(L, 2); // 8
jbe@384 1803 lua_call(L, 2, 1); // 6
jbe@384 1804 if (!lua_isnil(L, 6)) {
jbe@544 1805 // special handling of 1:1 references (primary side):
jbe@544 1806 lua_getfield(L, 6, "mode"); // 7
jbe@546 1807 if (lua_isstring(L, 7) && !strcmp(lua_tostring(L, 7), "11")) {
jbe@544 1808 lua_getfield(L, 6, "primary"); // 8
jbe@544 1809 if (lua_toboolean(L, 8)) {
jbe@544 1810 if (!lua_isnil(L, 3)) {
jbe@544 1811 // set backward reference:
jbe@547 1812 lua_getfield(L, 6, "back_ref"); // 9
jbe@547 1813 if (lua_toboolean(L, 9)) {
jbe@547 1814 lua_pushvalue(L, 1); // 10
jbe@547 1815 lua_settable(L, 3);
jbe@547 1816 }
jbe@544 1817 }
jbe@544 1818 // do nothing else:
jbe@544 1819 return 0;
jbe@544 1820 }
jbe@544 1821 }
jbe@545 1822 lua_settop(L, 6);
jbe/bsw@0 1823 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1824 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1825 lua_pushvalue(L, 2); // 8
jbe@384 1826 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1827 else lua_pushvalue(L, 3); // 9
jbe@384 1828 lua_settable(L, 7);
jbe@384 1829 lua_settop(L, 6);
jbe@544 1830 // special handling of 1:1 references (secondary side):
jbe@544 1831 lua_getfield(L, 6, "mode"); // 7
jbe@546 1832 if (lua_isstring(L, 7) && !strcmp(lua_tostring(L, 7), "11")) {
jbe@544 1833 lua_settop(L, 6);
jbe@544 1834 if (!lua_isnil(L, 3)) {
jbe@544 1835 // store object in other _ref table (use false for nil): // TODO: use special object instead of false
jbe@544 1836 lua_getfield(L, 3, "_ref"); // 7
jbe@547 1837 lua_getfield(L, 6, "back_ref"); // 8
jbe@547 1838 if (lua_toboolean(L, 8)) {
jbe@547 1839 lua_pushvalue(L, 1); // 9
jbe@547 1840 lua_settable(L, 7);
jbe@547 1841 }
jbe@544 1842 }
jbe@544 1843 }
jbe@544 1844 lua_settop(L, 6);
jbe/bsw@0 1845 // delete referencing key from _data table:
jbe@384 1846 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1847 if (lua_isnil(L, 7)) {
jbe/bsw@0 1848 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1849 }
jbe@384 1850 lua_pushvalue(L, 7); // 8
jbe@384 1851 lua_pushnil(L); // 9
jbe@384 1852 lua_settable(L, 5);
jbe@384 1853 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1854 lua_pushvalue(L, 7); // 9
jbe@384 1855 lua_pushboolean(L, 1); // 10
jbe@384 1856 lua_settable(L, 8);
jbe@384 1857 return 0;
jbe@384 1858 }
jbe@384 1859 lua_settop(L, 5);
jbe@384 1860 // check proxy access to document in special column:
jbe@384 1861 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1862 if (lua_toboolean(L, 6)) {
jbe@414 1863 lua_gettable(L, 5); // 6
jbe@414 1864 if (lua_isnil(L, 6)) {
jbe@414 1865 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1866 }
jbe@414 1867 lua_pushvalue(L, 2); // 7
jbe@414 1868 lua_pushvalue(L, 3); // 8
jbe@414 1869 lua_settable(L, 6);
jbe@414 1870 return 0;
jbe@384 1871 }
jbe@384 1872 lua_settop(L, 5);
jbe@384 1873 // store value in data field info:
jbe@384 1874 lua_pushvalue(L, 2); // 6
jbe@384 1875 lua_pushvalue(L, 3); // 7
jbe@384 1876 lua_settable(L, 5);
jbe@384 1877 lua_settop(L, 4);
jbe@384 1878 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1879 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1880 lua_pushvalue(L, 2); // 6
jbe@384 1881 lua_pushboolean(L, 1); // 7
jbe@384 1882 lua_settable(L, 5);
jbe@384 1883 lua_settop(L, 4);
jbe@384 1884 // reset reference cache, if neccessary:
jbe@384 1885 lua_pushcfunction(L,
jbe@384 1886 mondelefant_class_get_foreign_key_reference_name
jbe@384 1887 ); // 5
jbe@384 1888 lua_pushvalue(L, 4); // 6
jbe@384 1889 lua_pushvalue(L, 2); // 7
jbe@384 1890 lua_call(L, 2, 1); // 5
jbe@384 1891 if (!lua_isnil(L, 5)) {
jbe@384 1892 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1893 lua_pushvalue(L, 5); // 7
jbe@382 1894 lua_pushnil(L); // 8
jbe@382 1895 lua_settable(L, 6);
jbe/bsw@0 1896 }
jbe/bsw@0 1897 return 0;
jbe@23 1898 } else { // non-objects (i.e. lists)
jbe@23 1899 // perform rawset:
jbe/bsw@0 1900 lua_settop(L, 3);
jbe/bsw@0 1901 lua_rawset(L, 1);
jbe/bsw@0 1902 return 0;
jbe/bsw@0 1903 }
jbe/bsw@0 1904 }
jbe/bsw@0 1905
jbe@416 1906 // meta-method "__index" of column proxy:
jbe@416 1907 static int mondelefant_columns_index(lua_State *L) {
jbe@416 1908 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1909 lua_settop(L, 2);
jbe@416 1910 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 3
jbe@436 1911 // try primary keys of referenced objects:
jbe@436 1912 lua_pushcfunction(L,
jbe@436 1913 mondelefant_class_get_foreign_key_reference_name
jbe@436 1914 ); // 4
jbe@436 1915 lua_getfield(L, 3, "_class"); // 5
jbe@436 1916 lua_pushvalue(L, 2); // 6
jbe@436 1917 lua_call(L, 2, 1); // 4
jbe@436 1918 if (!lua_isnil(L, 4)) {
jbe@436 1919 // reference name at stack position 4
jbe@436 1920 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@436 1921 lua_getfield(L, 3, "_class"); // 6
jbe@436 1922 lua_pushvalue(L, 4); // 7
jbe@436 1923 lua_call(L, 2, 1); // reference info at stack position 5
jbe@436 1924 lua_getfield(L, 3, "_ref"); // 6
jbe@436 1925 lua_getfield(L, 5, "ref"); // 7
jbe@436 1926 lua_gettable(L, 6); // 7
jbe@436 1927 if (!lua_isnil(L, 7)) {
jbe@436 1928 if (lua_toboolean(L, 7)) {
jbe@436 1929 lua_getfield(L, 5, "that_key"); // 8
jbe@436 1930 if (lua_isnil(L, 8)) {
jbe@436 1931 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe@436 1932 }
jbe@436 1933 lua_gettable(L, 7); // 8
jbe@436 1934 } else {
jbe@436 1935 lua_pushnil(L);
jbe@436 1936 }
jbe@436 1937 return 1;
jbe@436 1938 }
jbe@436 1939 }
jbe@436 1940 lua_settop(L, 3);
jbe@436 1941 // if not successful, use _data table:
jbe@416 1942 lua_getfield(L, 3, "_data"); // 4
jbe@416 1943 lua_pushvalue(L, 2); // 5
jbe@416 1944 lua_gettable(L, 4); // 5
jbe@416 1945 return 1;
jbe@416 1946 }
jbe@416 1947
jbe@416 1948 // meta-method "__newindex" of column proxy:
jbe@416 1949 static int mondelefant_columns_newindex(lua_State *L) {
jbe@416 1950 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1951 lua_settop(L, 3);
jbe@416 1952 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 4
jbe@436 1953 // reset reference cache, if neccessary:
jbe@436 1954 lua_pushcfunction(L,
jbe@436 1955 mondelefant_class_get_foreign_key_reference_name
jbe@436 1956 ); // 5
jbe@436 1957 lua_getfield(L, 4, "_class"); // 6
jbe@436 1958 lua_pushvalue(L, 2); // 7
jbe@436 1959 lua_call(L, 2, 1); // 5
jbe@436 1960 if (!lua_isnil(L, 5)) {
jbe@436 1961 lua_getfield(L, 4, "_ref"); // 6
jbe@436 1962 lua_pushvalue(L, 5); // 7
jbe@436 1963 lua_pushnil(L); // 8
jbe@436 1964 lua_settable(L, 6);
jbe@436 1965 }
jbe@436 1966 lua_settop(L, 4);
jbe@436 1967 // set _data and _dirty:
jbe@416 1968 lua_getfield(L, 4, "_data"); // 5
jbe@416 1969 lua_getfield(L, 4, "_dirty"); // 6
jbe@416 1970 lua_pushvalue(L, 2);
jbe@416 1971 lua_pushvalue(L, 3);
jbe@416 1972 lua_settable(L, 5);
jbe@416 1973 lua_pushvalue(L, 2);
jbe@416 1974 lua_pushboolean(L, 1);
jbe@416 1975 lua_settable(L, 6);
jbe@416 1976 return 0;
jbe@416 1977 }
jbe@416 1978
jbe@23 1979 // meta-method "__index" of classes (models):
jbe/bsw@0 1980 static int mondelefant_class_index(lua_State *L) {
jbe@23 1981 // perform lookup in prototype:
jbe/bsw@0 1982 lua_settop(L, 2);
jbe/bsw@0 1983 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1984 lua_rawget(L, 1); // 3
jbe/bsw@0 1985 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1986 lua_gettable(L, 3); // 4
jbe/bsw@0 1987 return 1;
jbe/bsw@0 1988 }
jbe/bsw@0 1989
jbe@23 1990 // registration information for functions of library:
jbe/bsw@0 1991 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1992 {"connect", mondelefant_connect},
jbe/bsw@0 1993 {"set_class", mondelefant_set_class},
jbe/bsw@0 1994 {"new_class", mondelefant_new_class},
jbe/bsw@0 1995 {NULL, NULL}
jbe/bsw@0 1996 };
jbe/bsw@0 1997
jbe@23 1998 // registration information for meta-methods of database connections:
jbe/bsw@0 1999 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 2000 {"__gc", mondelefant_conn_free},
jbe/bsw@0 2001 {"__index", mondelefant_conn_index},
jbe/bsw@0 2002 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 2003 {NULL, NULL}
jbe/bsw@0 2004 };
jbe/bsw@0 2005
jbe@23 2006 // registration information for methods of database connections:
jbe/bsw@0 2007 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 2008 {"close", mondelefant_conn_close},
jbe/bsw@0 2009 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 2010 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@397 2011 {"try_wait", mondelefant_conn_try_wait},
jbe@393 2012 {"wait", mondelefant_conn_wait},
jbe/bsw@0 2013 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 2014 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 2015 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 2016 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 2017 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 2018 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 2019 {"query", mondelefant_conn_query},
jbe/bsw@0 2020 {NULL, NULL}
jbe/bsw@0 2021 };
jbe/bsw@0 2022
jbe@23 2023 // registration information for meta-methods of error objects:
jbe/bsw@0 2024 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe@472 2025 {"__tostring", mondelefant_errorobject_tostring},
jbe/bsw@0 2026 {NULL, NULL}
jbe/bsw@0 2027 };
jbe/bsw@0 2028
jbe@23 2029 // registration information for methods of error objects:
jbe/bsw@0 2030 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe@397 2031 {"escalate", lua_error},
jbe/bsw@0 2032 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 2033 {NULL, NULL}
jbe/bsw@0 2034 };
jbe/bsw@0 2035
jbe@23 2036 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 2037 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 2038 {"__index", mondelefant_result_index},
jbe/bsw@0 2039 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 2040 {NULL, NULL}
jbe/bsw@0 2041 };
jbe/bsw@0 2042
jbe@416 2043 // registration information for meta-methods of classes (models):
jbe/bsw@0 2044 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 2045 {"__index", mondelefant_class_index},
jbe/bsw@0 2046 {NULL, NULL}
jbe/bsw@0 2047 };
jbe/bsw@0 2048
jbe@23 2049 // registration information for methods of classes (models):
jbe/bsw@0 2050 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 2051 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 2052 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 2053 {"get_foreign_key_reference_name",
jbe/bsw@0 2054 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 2055 {NULL, NULL}
jbe/bsw@0 2056 };
jbe/bsw@0 2057
jbe@23 2058 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 2059 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 2060 {NULL, NULL}
jbe/bsw@0 2061 };
jbe/bsw@0 2062
jbe@23 2063 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 2064 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 2065 {NULL, NULL}
jbe/bsw@0 2066 };
jbe/bsw@0 2067
jbe@416 2068 // registration information for meta-methods of column proxy:
jbe@416 2069 static const struct luaL_Reg mondelefant_columns_mt_functions[] = {
jbe@416 2070 {"__index", mondelefant_columns_index},
jbe@416 2071 {"__newindex", mondelefant_columns_newindex},
jbe@416 2072 {NULL, NULL}
jbe@416 2073 };
jbe@416 2074
jbe@23 2075 // luaopen function to initialize/register library:
jbe/bsw@0 2076 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 2077 lua_settop(L, 0);
jbe@416 2078
jbe@416 2079 lua_newtable(L); // meta-table for columns proxy
jbe@416 2080 luaL_setfuncs(L, mondelefant_columns_mt_functions, 0);
jbe@416 2081 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 2082
jbe/bsw@0 2083 lua_newtable(L); // module at stack position 1
jbe@64 2084 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe/bsw@0 2085
jbe/bsw@0 2086 lua_pushvalue(L, 1); // 2
jbe/bsw@0 2087 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 2088
jbe/bsw@0 2089 lua_newtable(L); // 2
jbe/bsw@0 2090 // NOTE: only PostgreSQL is supported yet:
jbe@64 2091 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe/bsw@0 2092 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 2093 lua_newtable(L); // 2
jbe/bsw@0 2094 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 2095
jbe/bsw@0 2096 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 2097 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe/bsw@0 2098 lua_settop(L, 1);
jbe/bsw@0 2099 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 2100 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe/bsw@0 2101 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 2102 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 2103 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe/bsw@0 2104 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 2105
jbe/bsw@0 2106 lua_newtable(L); // 2
jbe@272 2107 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe/bsw@0 2108 lua_newtable(L); // 3
jbe@64 2109 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe/bsw@0 2110 lua_setfield(L, 2, "object");
jbe/bsw@0 2111 lua_newtable(L); // 3
jbe/bsw@0 2112 lua_setfield(L, 2, "object_get");
jbe/bsw@0 2113 lua_newtable(L); // 3
jbe/bsw@0 2114 lua_setfield(L, 2, "object_set");
jbe/bsw@0 2115 lua_newtable(L); // 3
jbe@64 2116 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe/bsw@0 2117 lua_setfield(L, 2, "list");
jbe/bsw@0 2118 lua_newtable(L); // 3
jbe/bsw@0 2119 lua_setfield(L, 2, "references");
jbe/bsw@0 2120 lua_newtable(L); // 3
jbe/bsw@0 2121 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 2122 lua_pushvalue(L, 2); // 3
jbe/bsw@0 2123 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 2124 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 2125
jbe/bsw@0 2126 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 2127 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe/bsw@0 2128 lua_newtable(L); // 3
jbe@64 2129 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe/bsw@0 2130 lua_setfield(L, 2, "__index");
jbe/bsw@0 2131 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 2132
jbe/bsw@0 2133 return 1;
jbe/bsw@0 2134 }

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