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annotate libraries/mondelefant/mondelefant_native.c @ 569:5b19007574de

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New argument active_link_attr for env.ui.paginate{...}
author jbe
date Wed Oct 13 17:21:44 2021 +0200 (2021-10-13)
parents 328f120924a2
children
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@562 486 if (!nonblock || 1) { // execute always to avoid compiler warning
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 int paramidx = 2;
jbe/bsw@0 698 const char *template;
jbe/bsw@0 699 size_t template_pos = 0;
jbe/bsw@0 700 luaL_Buffer buf;
jbe@407 701 // get database connection object:
jbe@561 702 mondelefant_get_conn(L, 1);
jbe@23 703 // if second argument is a string, return this string:
jbe@397 704 if (lua_type(L, 2) == LUA_TSTRING) {
jbe@397 705 lua_settop(L, 2);
jbe/bsw@0 706 return 1;
jbe/bsw@0 707 }
jbe@23 708 // if second argument has __tostring meta-method,
jbe@23 709 // then use this method and return its result:
jbe/bsw@0 710 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 711 // otherwise, require that second argument is a table:
jbe/bsw@0 712 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 713 // set stack top:
jbe@397 714 lua_settop(L, 2);
jbe@23 715 // get first element of table, which must be a string:
jbe/bsw@0 716 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 717 luaL_argcheck(L,
jbe/bsw@0 718 lua_isstring(L, 3),
jbe/bsw@0 719 2,
jbe/bsw@0 720 "First entry of SQL command structure is not a string."
jbe/bsw@0 721 );
jbe/bsw@0 722 template = lua_tostring(L, 3);
jbe@23 723 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 724 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 725 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 726 // reserve space on Lua stack:
jbe/bsw@0 727 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 728 lua_pushnil(L); // free space at stack position 6
jbe@23 729 // initialize Lua buffer for result string:
jbe/bsw@0 730 luaL_buffinit(L, &buf);
jbe@23 731 // fill buffer in loop:
jbe/bsw@0 732 while (1) {
jbe@23 733 // variable declaration:
jbe/bsw@0 734 char c;
jbe@23 735 // get next character:
jbe/bsw@0 736 c = template[template_pos++];
jbe@23 737 // break, when character is NULL byte:
jbe/bsw@0 738 if (!c) break;
jbe@23 739 // question-mark and dollar-sign are special characters:
jbe@23 740 if (c == '?' || c == '$') { // special character found
jbe@23 741 // check, if same character follows:
jbe@23 742 if (template[template_pos] == c) { // special character is escaped
jbe@23 743 // consume two characters of input and add one character to buffer:
jbe/bsw@0 744 template_pos++;
jbe/bsw@0 745 luaL_addchar(&buf, c);
jbe@23 746 } else { // special character is not escaped
jbe/bsw@0 747 luaL_Buffer keybuf;
jbe/bsw@0 748 int subcmd;
jbe@23 749 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 750 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 751 subcmd = (c == '$');
jbe@23 752 // read any number of alpha numeric chars or underscores
jbe@23 753 // and store them on Lua stack:
jbe/bsw@0 754 luaL_buffinit(L, &keybuf);
jbe/bsw@0 755 while (1) {
jbe/bsw@0 756 c = template[template_pos];
jbe/bsw@0 757 if (
jbe/bsw@0 758 (c < 'A' || c > 'Z') &&
jbe/bsw@0 759 (c < 'a' || c > 'z') &&
jbe/bsw@0 760 (c < '0' || c > '9') &&
jbe/bsw@0 761 (c != '_')
jbe/bsw@0 762 ) break;
jbe/bsw@0 763 luaL_addchar(&keybuf, c);
jbe/bsw@0 764 template_pos++;
jbe/bsw@0 765 }
jbe/bsw@0 766 luaL_pushresult(&keybuf);
jbe@23 767 // check, if any characters matched:
jbe@64 768 if (lua_rawlen(L, -1)) {
jbe@23 769 // if any alpha numeric chars or underscores were found,
jbe@23 770 // push them on stack as a Lua string and use them to lookup
jbe@23 771 // value from second argument:
jbe/bsw@0 772 lua_pushvalue(L, -1); // save key on stack
jbe@23 773 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 774 } else {
jbe@23 775 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 776 lua_pop(L, 1);
jbe/bsw@0 777 lua_pushnil(L); // put nil on key position
jbe@23 778 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 779 }
jbe@23 780 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 781 // branch according to type of special character ("?" or "$"):
jbe@23 782 if (subcmd) { // dollar-sign
jbe/bsw@0 783 size_t i;
jbe/bsw@0 784 size_t count;
jbe@23 785 // store fetched value (which is supposed to be sub-structure)
jbe@23 786 // on Lua stack position 5 and drop key:
jbe@23 787 lua_replace(L, 5);
jbe@23 788 lua_pop(L, 1);
jbe@23 789 // Lua stack contains: ..., <buffer>
jbe@23 790 // check, if fetched value is really a sub-structure:
jbe/bsw@0 791 luaL_argcheck(L,
jbe/bsw@0 792 !lua_isnil(L, 5),
jbe/bsw@0 793 2,
jbe/bsw@0 794 "SQL sub-structure not found."
jbe/bsw@0 795 );
jbe/bsw@0 796 luaL_argcheck(L,
jbe/bsw@0 797 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 798 2,
jbe/bsw@0 799 "SQL sub-structure must be a table."
jbe/bsw@0 800 );
jbe@23 801 // Lua stack contains: ..., <buffer>
jbe@23 802 // get value of "sep" attribute of sub-structure,
jbe@23 803 // and place it on Lua stack position 6:
jbe/bsw@0 804 lua_getfield(L, 5, "sep");
jbe@23 805 lua_replace(L, 6);
jbe@23 806 // if seperator is nil, then use ", " as default,
jbe@23 807 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 808 if (lua_isnil(L, 6)) {
jbe/bsw@0 809 lua_pushstring(L, ", ");
jbe/bsw@0 810 lua_replace(L, 6);
jbe/bsw@0 811 } else {
jbe/bsw@0 812 luaL_argcheck(L,
jbe/bsw@0 813 lua_isstring(L, 6),
jbe/bsw@0 814 2,
jbe/bsw@0 815 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 816 );
jbe/bsw@0 817 }
jbe@23 818 // iterate over items of sub-structure:
jbe@64 819 count = lua_rawlen(L, 5);
jbe/bsw@0 820 for (i = 0; i < count; i++) {
jbe@23 821 // add seperator, unless this is the first run:
jbe/bsw@0 822 if (i) {
jbe/bsw@0 823 lua_pushvalue(L, 6);
jbe/bsw@0 824 luaL_addvalue(&buf);
jbe/bsw@0 825 }
jbe@23 826 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 827 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 828 lua_pushvalue(L, 1);
jbe/bsw@0 829 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 830 lua_call(L, 2, 1);
jbe/bsw@0 831 luaL_addvalue(&buf);
jbe/bsw@0 832 }
jbe@23 833 } else { // question-mark
jbe/bsw@0 834 if (lua_toboolean(L, 4)) {
jbe@23 835 // call input_converter with connection handle, raw-value and
jbe@23 836 // an info-table which contains a "field_name" entry with the
jbe@23 837 // used key:
jbe/bsw@0 838 lua_pushvalue(L, 4);
jbe/bsw@0 839 lua_pushvalue(L, 1);
jbe/bsw@0 840 lua_pushvalue(L, -3);
jbe/bsw@0 841 lua_newtable(L);
jbe/bsw@0 842 lua_pushvalue(L, -6);
jbe/bsw@0 843 lua_setfield(L, -2, "field_name");
jbe/bsw@0 844 lua_call(L, 3, 1);
jbe@23 845 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 846 // remove key and raw-value:
jbe/bsw@0 847 lua_remove(L, -2);
jbe/bsw@0 848 lua_remove(L, -2);
jbe@23 849 // Lua stack contains: ..., <buffer>, final-value
jbe@23 850 // throw error, if final-value is not a string:
jbe/bsw@0 851 if (!lua_isstring(L, -1)) {
jbe/bsw@0 852 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 853 }
jbe/bsw@0 854 } else {
jbe@23 855 // remove key from stack:
jbe/bsw@0 856 lua_remove(L, -2);
jbe@23 857 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 858 // branch according to type of value:
jbe@408 859 // NOTE: Lua automatically converts numbers to strings
jbe@23 860 if (lua_isnil(L, -1)) { // value is nil
jbe@23 861 // push string "NULL" to stack:
jbe/bsw@0 862 lua_pushliteral(L, "NULL");
jbe@23 863 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 864 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 865 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 866 } else if (lua_isstring(L, -1)) { // value is string or number
jbe@408 867 // push output of "quote_string" method of database connection
jbe@408 868 // to stack:
jbe/bsw@0 869 lua_tostring(L, -1);
jbe/bsw@0 870 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 871 lua_pushvalue(L, 1);
jbe/bsw@0 872 lua_pushvalue(L, -3);
jbe/bsw@0 873 lua_call(L, 2, 1);
jbe@23 874 } else { // value is of other type
jbe@23 875 // throw error:
jbe/bsw@0 876 return luaL_error(L,
jbe/bsw@0 877 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 878 "or missing input_converter."
jbe/bsw@0 879 );
jbe/bsw@0 880 }
jbe@23 881 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 882 // remove raw-value:
jbe/bsw@0 883 lua_remove(L, -2);
jbe@23 884 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 885 }
jbe@23 886 // append final-value to buffer:
jbe/bsw@0 887 luaL_addvalue(&buf);
jbe/bsw@0 888 }
jbe/bsw@0 889 }
jbe@23 890 } else { // character is not special
jbe@23 891 // just copy character:
jbe/bsw@0 892 luaL_addchar(&buf, c);
jbe/bsw@0 893 }
jbe/bsw@0 894 }
jbe@23 895 // return string in buffer:
jbe/bsw@0 896 luaL_pushresult(&buf);
jbe/bsw@0 897 return 1;
jbe/bsw@0 898 }
jbe/bsw@0 899
jbe@23 900 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 901 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 902 // max number of columns in a database result:
jbe/bsw@0 903 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 904 // enum values for 'modes' array in C-function below:
jbe/bsw@0 905 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 906 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 907 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 908
jbe@23 909 // method "try_query" of database handles:
jbe/bsw@0 910 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 911 mondelefant_conn_t *conn;
jbe/bsw@0 912 int command_count;
jbe/bsw@0 913 int command_idx;
jbe/bsw@0 914 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 915 luaL_Buffer buf;
jbe/bsw@0 916 int sent_success;
jbe/bsw@0 917 PGresult *res;
jbe/bsw@0 918 int rows, cols, row, col;
jbe@407 919 // get database connection object:
jbe/bsw@0 920 conn = mondelefant_get_conn(L, 1);
jbe@23 921 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 922 command_count = lua_gettop(L) / 2;
jbe@23 923 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 924 lua_pushnil(L);
jbe@23 925 // throw error, if number of commands is too high:
jbe/bsw@0 926 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 927 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 928 }
jbe@23 929 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 930 luaL_buffinit(L, &buf);
jbe/bsw@0 931 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 932 int mode;
jbe/bsw@0 933 int mode_idx; // stack index of mode string
jbe/bsw@0 934 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 935 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 936 lua_pushvalue(L, 1);
jbe/bsw@0 937 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 938 lua_call(L, 2, 1);
jbe/bsw@0 939 luaL_addvalue(&buf);
jbe/bsw@0 940 luaL_addchar(&buf, ';');
jbe/bsw@0 941 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 942 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 943 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 944 } else {
jbe/bsw@0 945 const char *modestr;
jbe/bsw@0 946 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 947 if (!strcmp(modestr, "list")) {
jbe/bsw@0 948 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 949 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 950 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 951 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 952 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 953 } else {
jbe@397 954 return luaL_argerror(L, mode_idx, "unknown query mode");
jbe/bsw@0 955 }
jbe/bsw@0 956 }
jbe/bsw@0 957 modes[command_idx] = mode;
jbe/bsw@0 958 }
jbe/bsw@0 959 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 960 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 961 // call sql_tracer, if set:
jbe/bsw@0 962 lua_settop(L, 2);
jbe/bsw@0 963 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 964 if (lua_toboolean(L, 3)) {
jbe/bsw@0 965 lua_pushvalue(L, 1); // 4
jbe/bsw@0 966 lua_pushvalue(L, 2); // 5
jbe/bsw@0 967 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 968 }
jbe@23 969 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 970 // position 3.
jbe@23 971 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 972 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 973 // create preliminary result table:
jbe/bsw@0 974 lua_newtable(L); // results in table at stack position 4
jbe@23 975 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 976 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 977 int mode;
jbe/bsw@0 978 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 979 ExecStatusType pgstatus;
jbe@23 980 // fetch mode which was given for the command:
jbe/bsw@0 981 mode = modes[command_idx];
jbe@23 982 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 983 if (sent_success) {
jbe@408 984 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 985 if (conn->todo_PQclear) {
jbe@410 986 PQclear(conn->todo_PQclear);
jbe@410 987 conn->todo_PQclear = NULL;
jbe@410 988 }
jbe@23 989 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 990 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 991 res = PQgetResult(conn->pgconn);
jbe/bsw@0 992 if (command_idx >= command_count && !res) break;
jbe/bsw@0 993 if (res) {
jbe/bsw@0 994 pgstatus = PQresultStatus(res);
jbe/bsw@0 995 rows = PQntuples(res);
jbe/bsw@0 996 cols = PQnfields(res);
jbe@412 997 // ensure call of PQclear in case of Lua errors:
jbe@408 998 conn->todo_PQclear = res;
jbe/bsw@0 999 }
jbe/bsw@0 1000 }
jbe@23 1001 // handle errors:
jbe/bsw@0 1002 if (
jbe/bsw@0 1003 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 1004 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 1005 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 1006 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 1007 ) {
jbe/bsw@0 1008 const char *command;
jbe/bsw@0 1009 command = lua_tostring(L, 2);
jbe/bsw@0 1010 lua_newtable(L); // 5
jbe@406 1011 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 1012 lua_pushvalue(L, 1);
jbe/bsw@0 1013 lua_setfield(L, 5, "connection");
jbe/bsw@0 1014 lua_pushvalue(L, 2);
jbe/bsw@0 1015 lua_setfield(L, 5, "sql_command");
jbe@397 1016 if (!sent_success) {
jbe@397 1017 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 1018 lua_setfield(L, 5, "code");
jbe@397 1019 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe/bsw@0 1020 lua_setfield(L, 5, "message");
jbe/bsw@0 1021 } else {
jbe@397 1022 lua_pushinteger(L, command_idx + 1);
jbe@397 1023 lua_setfield(L, 5, "command_number");
jbe@397 1024 if (!res) {
jbe@397 1025 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe@397 1026 lua_setfield(L, 5, "code");
jbe@397 1027 lua_pushliteral(L, "Received too few database result sets.");
jbe@397 1028 lua_setfield(L, 5, "message");
jbe@397 1029 } else if (command_idx >= command_count) {
jbe@397 1030 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe@397 1031 lua_setfield(L, 5, "code");
jbe@397 1032 lua_pushliteral(L, "Received too many database result sets.");
jbe@397 1033 lua_setfield(L, 5, "message");
jbe@397 1034 } else if (
jbe@397 1035 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe@397 1036 ) {
jbe@397 1037 const char *sqlstate;
jbe@397 1038 const char *errmsg;
jbe@397 1039 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe@397 1040 lua_setfield(L, 5, "pg_severity");
jbe@397 1041 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe@397 1042 if (sqlstate) {
jbe@397 1043 lua_pushstring(L, sqlstate);
jbe@397 1044 lua_setfield(L, 5, "pg_sqlstate");
jbe@397 1045 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe@397 1046 lua_setfield(L, 5, "code");
jbe@397 1047 } else {
jbe@397 1048 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe@397 1049 lua_setfield(L, 5, "code");
jbe@397 1050 }
jbe@397 1051 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe@397 1052 if (errmsg) {
jbe@397 1053 mondelefant_push_first_line(L, errmsg);
jbe@397 1054 lua_setfield(L, 5, "message");
jbe@397 1055 lua_pushstring(L, errmsg);
jbe@397 1056 lua_setfield(L, 5, "pg_message_primary");
jbe@397 1057 } else {
jbe@397 1058 lua_pushliteral(L,
jbe@397 1059 "Error while fetching result, but no error message given."
jbe@397 1060 );
jbe@397 1061 lua_setfield(L, 5, "message");
jbe@397 1062 }
jbe@397 1063 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe@397 1064 lua_setfield(L, 5, "pg_message_detail");
jbe@397 1065 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe@397 1066 lua_setfield(L, 5, "pg_message_hint");
jbe@397 1067 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe@397 1068 // byte offsets, as Lua 5.2 is not Unicode aware.
jbe@397 1069 {
jbe@397 1070 char *tmp;
jbe@397 1071 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe@397 1072 if (tmp) {
jbe@397 1073 int pos;
jbe@397 1074 pos = atoi(tmp) - 1;
jbe@397 1075 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1076 pos = utf8_position_to_byte(command, pos);
jbe@397 1077 }
jbe@397 1078 lua_pushinteger(L, pos + 1);
jbe@397 1079 lua_setfield(L, 5, "position");
jbe@397 1080 }
jbe@397 1081 }
jbe@397 1082 {
jbe@397 1083 const char *internal_query;
jbe@397 1084 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe@397 1085 lua_pushstring(L, internal_query);
jbe@397 1086 lua_setfield(L, 5, "pg_internal_query");
jbe@397 1087 char *tmp;
jbe@397 1088 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe@397 1089 if (tmp) {
jbe@397 1090 int pos;
jbe@397 1091 pos = atoi(tmp) - 1;
jbe@397 1092 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1093 pos = utf8_position_to_byte(internal_query, pos);
jbe@397 1094 }
jbe@397 1095 lua_pushinteger(L, pos + 1);
jbe@397 1096 lua_setfield(L, 5, "pg_internal_position");
jbe@397 1097 }
jbe@397 1098 }
jbe@397 1099 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe@397 1100 lua_setfield(L, 5, "pg_context");
jbe@397 1101 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe@397 1102 lua_setfield(L, 5, "pg_source_file");
jbe@397 1103 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe@397 1104 lua_setfield(L, 5, "pg_source_line");
jbe@397 1105 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe@397 1106 lua_setfield(L, 5, "pg_source_function");
jbe@397 1107 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe@397 1108 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe@397 1109 lua_setfield(L, 5, "code");
jbe@397 1110 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe@397 1111 lua_setfield(L, 5, "message");
jbe@397 1112 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe@397 1113 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe@397 1114 lua_setfield(L, 5, "code");
jbe@397 1115 lua_pushliteral(L, "Got more than one result row.");
jbe@397 1116 lua_setfield(L, 5, "message");
jbe@397 1117 } else {
jbe@397 1118 // should not happen
jbe@397 1119 abort();
jbe@397 1120 }
jbe@397 1121 if (res) {
jbe@397 1122 PQclear(res);
jbe@397 1123 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe@408 1124 // avoid double call of PQclear later:
jbe@408 1125 conn->todo_PQclear = NULL;
jbe@397 1126 }
jbe/bsw@0 1127 }
jbe/bsw@0 1128 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1129 lua_pushvalue(L, 3);
jbe/bsw@0 1130 lua_pushvalue(L, 5);
jbe/bsw@0 1131 lua_call(L, 1, 0);
jbe/bsw@0 1132 }
jbe/bsw@0 1133 return 1;
jbe/bsw@0 1134 }
jbe@23 1135 // call "create_list" or "create_object" method of database handle,
jbe@23 1136 // result will be at stack position 5:
jbe/bsw@0 1137 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1138 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1139 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1140 lua_call(L, 1, 1); // 5
jbe/bsw@0 1141 } else {
jbe/bsw@0 1142 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1143 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1144 lua_call(L, 1, 1); // 5
jbe/bsw@0 1145 }
jbe@23 1146 // set "_column_info":
jbe@23 1147 lua_newtable(L); // 6
jbe/bsw@0 1148 for (col = 0; col < cols; col++) {
jbe/bsw@0 1149 lua_newtable(L); // 7
jbe@380 1150 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1151 lua_pushvalue(L, 8); // 9
jbe@380 1152 lua_pushvalue(L, 7); // 10
jbe@380 1153 lua_rawset(L, 6);
jbe/bsw@0 1154 lua_setfield(L, 7, "field_name");
jbe@380 1155 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1156 {
jbe/bsw@0 1157 Oid tmp;
jbe/bsw@0 1158 tmp = PQftable(res, col);
jbe/bsw@0 1159 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1160 else lua_pushinteger(L, tmp);
jbe/bsw@0 1161 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1162 }
jbe/bsw@0 1163 {
jbe/bsw@0 1164 int tmp;
jbe/bsw@0 1165 tmp = PQftablecol(res, col);
jbe/bsw@0 1166 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1167 else lua_pushinteger(L, tmp);
jbe/bsw@0 1168 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1169 }
jbe/bsw@0 1170 {
jbe/bsw@0 1171 Oid tmp;
jbe/bsw@0 1172 tmp = PQftype(res, col);
jbe/bsw@0 1173 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1174 lua_pushinteger(L, tmp);
jbe/bsw@0 1175 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1176 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1177 lua_setfield(L, 7, "type");
jbe/bsw@0 1178 }
jbe/bsw@0 1179 {
jbe/bsw@0 1180 int tmp;
jbe/bsw@0 1181 tmp = PQfmod(res, col);
jbe/bsw@0 1182 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1183 else lua_pushinteger(L, tmp);
jbe/bsw@0 1184 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1185 }
jbe/bsw@0 1186 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1187 }
jbe@23 1188 lua_setfield(L, 5, "_column_info");
jbe@23 1189 // set "_rows_affected":
jbe/bsw@0 1190 {
jbe/bsw@0 1191 char *tmp;
jbe/bsw@0 1192 tmp = PQcmdTuples(res);
jbe/bsw@0 1193 if (tmp[0]) {
jbe/bsw@0 1194 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1195 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1196 }
jbe/bsw@0 1197 }
jbe@23 1198 // set "_oid":
jbe/bsw@0 1199 {
jbe/bsw@0 1200 Oid tmp;
jbe/bsw@0 1201 tmp = PQoidValue(res);
jbe/bsw@0 1202 if (tmp != InvalidOid) {
jbe/bsw@0 1203 lua_pushinteger(L, tmp);
jbe/bsw@0 1204 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1205 }
jbe/bsw@0 1206 }
jbe@23 1207 // copy data as strings or nil, while performing binary unescaping
jbe@23 1208 // automatically:
jbe/bsw@0 1209 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1210 for (row = 0; row < rows; row++) {
jbe/bsw@0 1211 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1212 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1213 lua_call(L, 1, 1); // 6
jbe/bsw@0 1214 for (col = 0; col < cols; col++) {
jbe/bsw@0 1215 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1216 lua_pushnil(L);
jbe/bsw@0 1217 } else if (binary[col]) {
jbe/bsw@0 1218 size_t binlen;
jbe/bsw@0 1219 char *binval;
jbe@412 1220 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1221 if (conn->todo_PQfreemem) {
jbe@412 1222 PQfreemem(conn->todo_PQfreemem);
jbe@412 1223 conn->todo_PQfreemem = NULL;
jbe@412 1224 }
jbe@412 1225 // Unescape binary data:
jbe/bsw@0 1226 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1227 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1228 );
jbe/bsw@0 1229 if (!binval) {
jbe/bsw@0 1230 return luaL_error(L,
jbe/bsw@0 1231 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1232 );
jbe/bsw@0 1233 }
jbe@412 1234 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1235 conn->todo_PQfreemem = binval;
jbe@412 1236 // create Lua string:
jbe/bsw@0 1237 lua_pushlstring(L, binval, binlen);
jbe@412 1238 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1239 PQfreemem(binval);
jbe@412 1240 // avoid double call of PQfreemem later:
jbe@412 1241 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1242 } else {
jbe/bsw@0 1243 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1244 }
jbe/bsw@0 1245 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1246 }
jbe/bsw@0 1247 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1248 }
jbe/bsw@0 1249 } else if (rows == 1) {
jbe/bsw@0 1250 for (col = 0; col < cols; col++) {
jbe/bsw@0 1251 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1252 lua_pushnil(L);
jbe/bsw@0 1253 } else if (binary[col]) {
jbe/bsw@0 1254 size_t binlen;
jbe/bsw@0 1255 char *binval;
jbe@412 1256 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1257 if (conn->todo_PQfreemem) {
jbe@412 1258 PQfreemem(conn->todo_PQfreemem);
jbe@412 1259 conn->todo_PQfreemem = NULL;
jbe@412 1260 }
jbe@412 1261 // Unescape binary data:
jbe/bsw@0 1262 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1263 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1264 );
jbe/bsw@0 1265 if (!binval) {
jbe/bsw@0 1266 return luaL_error(L,
jbe/bsw@0 1267 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1268 );
jbe/bsw@0 1269 }
jbe@412 1270 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1271 conn->todo_PQfreemem = binval;
jbe@412 1272 // create Lua string:
jbe/bsw@0 1273 lua_pushlstring(L, binval, binlen);
jbe@412 1274 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1275 PQfreemem(binval);
jbe@412 1276 // avoid double call of PQfreemem later:
jbe@412 1277 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1278 } else {
jbe/bsw@0 1279 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1280 }
jbe/bsw@0 1281 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1282 }
jbe/bsw@0 1283 } else {
jbe/bsw@0 1284 // no row in optrow mode
jbe/bsw@0 1285 lua_pop(L, 1);
jbe/bsw@0 1286 lua_pushnil(L);
jbe/bsw@0 1287 }
jbe@23 1288 // save result in result list:
jbe/bsw@0 1289 lua_rawseti(L, 4, command_idx+1);
jbe@23 1290 // extra assertion:
jbe/bsw@0 1291 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1292 // free memory acquired by libpq:
jbe/bsw@0 1293 PQclear(res);
jbe@408 1294 // avoid double call of PQclear later:
jbe@408 1295 conn->todo_PQclear = NULL;
jbe/bsw@0 1296 }
jbe/bsw@0 1297 // trace callback at stack position 3
jbe/bsw@0 1298 // result at stack position 4 (top of stack)
jbe@23 1299 // if a trace callback is existent, then call:
jbe/bsw@0 1300 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1301 lua_pushvalue(L, 3);
jbe/bsw@0 1302 lua_call(L, 0, 0);
jbe/bsw@0 1303 }
jbe@23 1304 // put result at stack position 3:
jbe@23 1305 lua_replace(L, 3);
jbe@23 1306 // get output converter to stack position 4:
jbe@23 1307 lua_getfield(L, 1, "output_converter");
jbe@374 1308 // get mutability state saver to stack position 5:
jbe@375 1309 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1310 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1311 lua_replace(L, -2);
jbe@23 1312 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1313 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1314 int mode;
jbe/bsw@0 1315 mode = modes[command_idx];
jbe@374 1316 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1317 if (lua_toboolean(L, 6)) {
jbe@374 1318 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@374 1319 cols = lua_rawlen(L, 7);
jbe/bsw@0 1320 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@374 1321 rows = lua_rawlen(L, 6);
jbe/bsw@0 1322 for (row = 0; row < rows; row++) {
jbe@374 1323 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1324 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1325 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1326 for (col = 0; col < cols; col++) {
jbe@375 1327 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1328 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1329 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1330 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1331 lua_pushvalue(L, 1); // connection
jbe@374 1332 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1333 lua_pushvalue(L, 11); // this column info
jbe@375 1334 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1335 } else {
jbe@375 1336 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1337 }
jbe@375 1338 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1339 lua_pushvalue(L, 12); // copy of field name
jbe@375 1340 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1341 lua_pushvalue(L, 13); // copy of value
jbe@375 1342 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1343 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1344 }
jbe@375 1345 lua_pushvalue(L, 13); // 14
jbe@374 1346 lua_rawseti(L, 8, col+1);
jbe@374 1347 lua_rawset(L, 9);
jbe@399 1348 lua_settop(L, 10);
jbe/bsw@0 1349 }
jbe@374 1350 lua_settop(L, 7);
jbe/bsw@0 1351 }
jbe/bsw@0 1352 } else {
jbe@374 1353 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1354 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1355 for (col = 0; col < cols; col++) {
jbe@375 1356 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1357 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1358 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1359 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1360 lua_pushvalue(L, 1); // connection
jbe@374 1361 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1362 lua_pushvalue(L, 10); // this column info
jbe@375 1363 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1364 } else {
jbe@375 1365 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1366 }
jbe@375 1367 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1368 lua_pushvalue(L, 11); // copy of field name
jbe@375 1369 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1370 lua_pushvalue(L, 12); // copy of value
jbe@375 1371 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1372 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1373 }
jbe@375 1374 lua_pushvalue(L, 12); // 13
jbe@374 1375 lua_rawseti(L, 6, col+1);
jbe@374 1376 lua_rawset(L, 8);
jbe@399 1377 lua_settop(L, 9);
jbe/bsw@0 1378 }
jbe/bsw@0 1379 }
jbe/bsw@0 1380 }
jbe@374 1381 lua_settop(L, 5);
jbe/bsw@0 1382 }
jbe@23 1383 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1384 lua_settop(L, 3);
jbe/bsw@0 1385 lua_pushnil(L);
jbe/bsw@0 1386 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1387 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1388 }
jbe/bsw@0 1389 return command_count+1;
jbe/bsw@0 1390 }
jbe/bsw@0 1391
jbe@472 1392 // meta-method "__tostring" of error objects:
jbe@472 1393 static int mondelefant_errorobject_tostring(lua_State *L) {
jbe@472 1394 const char *errclass;
jbe@472 1395 const char *errmsg;
jbe@472 1396 luaL_checktype(L, 1, LUA_TTABLE);
jbe@472 1397 lua_settop(L, 1);
jbe@472 1398 lua_getfield(L, 1, "code"); // 2
jbe@472 1399 lua_getfield(L, 1, "message"); // 3
jbe@472 1400 errclass = lua_tostring(L, 2);
jbe@472 1401 errmsg = lua_tostring(L, 3);
jbe@472 1402 if (!errclass) errclass = "(null)";
jbe@472 1403 if (!errmsg) errclass = "(null)";
jbe@472 1404 lua_pushfstring(L, "database error of class \"%s\": %s", errclass, errmsg);
jbe@472 1405 return 1;
jbe@472 1406 }
jbe@472 1407
jbe@397 1408 // method "is_kind_of" of error objects:
jbe@397 1409 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe@397 1410 const char *errclass;
jbe@397 1411 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1412 errclass = luaL_checkstring(L, 2);
jbe@397 1413 lua_settop(L, 2);
jbe@397 1414 lua_getfield(L, 1, "code"); // 3
jbe@397 1415 luaL_argcheck(L,
jbe@397 1416 lua_type(L, 3) == LUA_TSTRING,
jbe@397 1417 1,
jbe@397 1418 "field 'code' of error object is not a string"
jbe@397 1419 );
jbe@397 1420 lua_pushboolean(L,
jbe@397 1421 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
jbe@397 1422 );
jbe@397 1423 return 1;
jbe@397 1424 }
jbe@397 1425
jbe@397 1426 // method "wait" of database handles:
jbe@397 1427 static int mondelefant_conn_wait(lua_State *L) {
jbe@397 1428 int argc;
jbe@397 1429 // count number of arguments:
jbe@397 1430 argc = lua_gettop(L);
jbe@397 1431 // insert "try_wait" function/method at stack position 1:
jbe@397 1432 lua_pushcfunction(L, mondelefant_conn_try_wait);
jbe@397 1433 lua_insert(L, 1);
jbe@397 1434 // call "try_wait" method:
jbe@397 1435 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@397 1436 // check, if error occurred:
jbe@397 1437 if (lua_toboolean(L, 1)) {
jbe@397 1438 // raise error
jbe/bsw@0 1439 lua_settop(L, 1);
jbe/bsw@0 1440 return lua_error(L);
jbe/bsw@0 1441 } else {
jbe@397 1442 // return everything but nil error object:
jbe@397 1443 return lua_gettop(L) - 1;
jbe/bsw@0 1444 }
jbe/bsw@0 1445 }
jbe/bsw@0 1446
jbe@23 1447 // method "query" of database handles:
jbe/bsw@0 1448 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1449 int argc;
jbe@23 1450 // count number of arguments:
jbe/bsw@0 1451 argc = lua_gettop(L);
jbe@23 1452 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1453 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1454 lua_insert(L, 1);
jbe@23 1455 // call "try_query" method:
jbe@23 1456 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1457 // check, if error occurred:
jbe@23 1458 if (lua_toboolean(L, 1)) {
jbe@397 1459 // raise error
jbe@397 1460 lua_settop(L, 1);
jbe@397 1461 return lua_error(L);
jbe/bsw@0 1462 } else {
jbe@23 1463 // return everything but nil error object:
jbe@23 1464 return lua_gettop(L) - 1;
jbe/bsw@0 1465 }
jbe/bsw@0 1466 }
jbe/bsw@0 1467
jbe@23 1468 // library function "set_class":
jbe/bsw@0 1469 static int mondelefant_set_class(lua_State *L) {
jbe@23 1470 // ensure that first argument is a database result list/object:
jbe/bsw@0 1471 lua_settop(L, 2);
jbe/bsw@0 1472 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1473 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1474 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@23 1475 // ensure that second argument is a database class (model):
jbe/bsw@0 1476 lua_settop(L, 2);
jbe/bsw@0 1477 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1478 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1479 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@23 1480 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1481 lua_settop(L, 2);
jbe/bsw@0 1482 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1483 lua_setfield(L, 1, "_class");
jbe@23 1484 // test, if database result is a list (and not a single object):
jbe/bsw@0 1485 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1486 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1487 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1488 int i;
jbe@23 1489 // set attribute "_class" of all elements to given class:
jbe@64 1490 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe/bsw@0 1491 lua_settop(L, 2);
jbe/bsw@0 1492 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1493 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1494 lua_setfield(L, 3, "_class");
jbe/bsw@0 1495 }
jbe/bsw@0 1496 }
jbe@23 1497 // return first argument:
jbe/bsw@0 1498 lua_settop(L, 1);
jbe/bsw@0 1499 return 1;
jbe/bsw@0 1500 }
jbe/bsw@0 1501
jbe@23 1502 // library function "new_class":
jbe/bsw@0 1503 static int mondelefant_new_class(lua_State *L) {
jbe@397 1504 // if no argument is given, use an empty table:
jbe@397 1505 if (lua_isnoneornil(L, 1)) {
jbe/bsw@0 1506 lua_settop(L, 0);
jbe/bsw@0 1507 lua_newtable(L); // 1
jbe@397 1508 } else {
jbe@397 1509 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1510 lua_settop(L, 1);
jbe/bsw@0 1511 }
jbe@23 1512 // set meta-table for database classes (models):
jbe@406 1513 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
jbe@23 1514 // check, if "prototype" attribute is not set:
jbe/bsw@0 1515 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1516 lua_rawget(L, 1); // 2
jbe/bsw@0 1517 if (!lua_toboolean(L, 2)) {
jbe@23 1518 // set "prototype" attribute to default prototype:
jbe/bsw@0 1519 lua_pushliteral(L, "prototype"); // 3
jbe@413 1520 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1521 lua_rawset(L, 1);
jbe/bsw@0 1522 }
jbe@23 1523 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1524 lua_settop(L, 1);
jbe/bsw@0 1525 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1526 lua_rawget(L, 1); // 2
jbe/bsw@0 1527 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1528 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1529 lua_newtable(L); // 4
jbe/bsw@0 1530 lua_rawset(L, 1);
jbe/bsw@0 1531 }
jbe@23 1532 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1533 lua_settop(L, 1);
jbe/bsw@0 1534 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1535 lua_rawget(L, 1); // 2
jbe/bsw@0 1536 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1537 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1538 lua_newtable(L); // 4
jbe/bsw@0 1539 lua_rawset(L, 1);
jbe/bsw@0 1540 }
jbe@23 1541 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1542 lua_settop(L, 1);
jbe/bsw@0 1543 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1544 lua_rawget(L, 1); // 2
jbe/bsw@0 1545 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1546 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1547 lua_newtable(L); // 4
jbe/bsw@0 1548 lua_rawset(L, 1);
jbe/bsw@0 1549 }
jbe@23 1550 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1551 lua_settop(L, 1);
jbe/bsw@0 1552 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1553 lua_rawget(L, 1); // 2
jbe/bsw@0 1554 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1555 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1556 lua_newtable(L); // 4
jbe/bsw@0 1557 lua_rawset(L, 1);
jbe/bsw@0 1558 }
jbe@23 1559 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1560 lua_settop(L, 1);
jbe/bsw@0 1561 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1562 lua_rawget(L, 1); // 2
jbe/bsw@0 1563 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1564 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1565 lua_newtable(L); // 4
jbe/bsw@0 1566 lua_rawset(L, 1);
jbe/bsw@0 1567 }
jbe@23 1568 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1569 lua_settop(L, 1);
jbe/bsw@0 1570 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1571 lua_rawget(L, 1); // 2
jbe/bsw@0 1572 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1573 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1574 lua_newtable(L); // 4
jbe/bsw@0 1575 lua_rawset(L, 1);
jbe/bsw@0 1576 }
jbe@23 1577 // return table:
jbe/bsw@0 1578 lua_settop(L, 1);
jbe/bsw@0 1579 return 1;
jbe/bsw@0 1580 }
jbe/bsw@0 1581
jbe@23 1582 // method "get_reference" of classes (models):
jbe/bsw@0 1583 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1584 lua_settop(L, 2);
jbe/bsw@0 1585 while (lua_toboolean(L, 1)) {
jbe@23 1586 // get "references" table:
jbe/bsw@0 1587 lua_getfield(L, 1, "references"); // 3
jbe@23 1588 // perform lookup:
jbe/bsw@0 1589 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1590 lua_gettable(L, 3); // 4
jbe@23 1591 // return result, if lookup was successful:
jbe/bsw@0 1592 if (!lua_isnil(L, 4)) return 1;
jbe@23 1593 // replace current table by its prototype:
jbe/bsw@0 1594 lua_settop(L, 2);
jbe/bsw@0 1595 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1596 lua_rawget(L, 1); // 3
jbe/bsw@0 1597 lua_replace(L, 1);
jbe/bsw@0 1598 }
jbe@23 1599 // return nothing:
jbe/bsw@0 1600 return 0;
jbe/bsw@0 1601 }
jbe/bsw@0 1602
jbe@23 1603 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1604 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1605 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1606 }
jbe/bsw@0 1607
jbe@23 1608 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1609 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1610 lua_settop(L, 2);
jbe/bsw@0 1611 while (lua_toboolean(L, 1)) {
jbe@23 1612 // get "foreign_keys" table:
jbe/bsw@0 1613 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1614 // perform lookup:
jbe/bsw@0 1615 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1616 lua_gettable(L, 3); // 4
jbe@23 1617 // return result, if lookup was successful:
jbe/bsw@0 1618 if (!lua_isnil(L, 4)) return 1;
jbe@23 1619 // replace current table by its prototype:
jbe/bsw@0 1620 lua_settop(L, 2);
jbe/bsw@0 1621 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1622 lua_rawget(L, 1); // 3
jbe/bsw@0 1623 lua_replace(L, 1);
jbe/bsw@0 1624 }
jbe@23 1625 // return nothing:
jbe/bsw@0 1626 return 0;
jbe/bsw@0 1627 }
jbe/bsw@0 1628
jbe@23 1629 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1630 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1631 const char *result_type;
jbe@23 1632 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1633 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1634 return 0;
jbe/bsw@0 1635 }
jbe@436 1636 // class on stack position 3:
jbe@23 1637 lua_settop(L, 2);
jbe/bsw@0 1638 lua_getfield(L, 1, "_class"); // 3
jbe@23 1639 // get value of "_type" attribute:
jbe/bsw@0 1640 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1641 result_type = lua_tostring(L, 4);
jbe@23 1642 // different lookup for lists and objects:
jbe@23 1643 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1644 lua_settop(L, 3);
jbe@384 1645 // try inherited attributes, methods or getter functions:
jbe@383 1646 lua_pushvalue(L, 3); // 4
jbe@383 1647 while (lua_toboolean(L, 4)) {
jbe@383 1648 lua_getfield(L, 4, "object"); // 5
jbe@383 1649 lua_pushvalue(L, 2); // 6
jbe@383 1650 lua_gettable(L, 5); // 6
jbe@383 1651 if (!lua_isnil(L, 6)) return 1;
jbe@383 1652 lua_settop(L, 4);
jbe@383 1653 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1654 lua_pushvalue(L, 2); // 6
jbe@383 1655 lua_gettable(L, 5); // 6
jbe@383 1656 if (lua_toboolean(L, 6)) {
jbe@383 1657 lua_pushvalue(L, 1); // 7
jbe@383 1658 lua_call(L, 1, 1); // 6
jbe/bsw@0 1659 return 1;
jbe/bsw@0 1660 }
jbe@383 1661 lua_settop(L, 4);
jbe@383 1662 lua_pushliteral(L, "prototype"); // 5
jbe@383 1663 lua_rawget(L, 4); // 5
jbe@383 1664 lua_replace(L, 4);
jbe/bsw@0 1665 }
jbe@383 1666 lua_settop(L, 3);
jbe/bsw@0 1667 // try primary keys of referenced objects:
jbe/bsw@0 1668 lua_pushcfunction(L,
jbe/bsw@0 1669 mondelefant_class_get_foreign_key_reference_name
jbe@383 1670 ); // 4
jbe@383 1671 lua_pushvalue(L, 3); // 5
jbe@383 1672 lua_pushvalue(L, 2); // 6
jbe@383 1673 lua_call(L, 2, 1); // 4
jbe@383 1674 if (!lua_isnil(L, 4)) {
jbe@383 1675 // reference name at stack position 4
jbe@383 1676 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1677 lua_pushvalue(L, 3); // 6
jbe@383 1678 lua_pushvalue(L, 4); // 7
jbe@383 1679 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1680 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1681 lua_getfield(L, 5, "ref"); // 7
jbe@383 1682 lua_gettable(L, 6); // 7
jbe@383 1683 if (!lua_isnil(L, 7)) {
jbe@383 1684 if (lua_toboolean(L, 7)) {
jbe@383 1685 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1686 if (lua_isnil(L, 8)) {
jbe/bsw@0 1687 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1688 }
jbe@383 1689 lua_gettable(L, 7); // 8
jbe/bsw@0 1690 } else {
jbe/bsw@0 1691 lua_pushnil(L);
jbe/bsw@0 1692 }
jbe/bsw@0 1693 return 1;
jbe/bsw@0 1694 }
jbe/bsw@0 1695 }
jbe@383 1696 lua_settop(L, 3);
jbe@383 1697 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1698 // try cached referenced object (or cached NULL reference):
jbe@383 1699 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1700 lua_pushvalue(L, 2); // 6
jbe@383 1701 lua_gettable(L, 5); // 6
jbe@383 1702 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1703 lua_pushnil(L);
jbe/bsw@0 1704 return 1;
jbe@383 1705 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1706 return 1;
jbe/bsw@0 1707 }
jbe@383 1708 lua_settop(L, 4);
jbe/bsw@0 1709 // try to load a referenced object:
jbe@383 1710 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1711 lua_pushvalue(L, 3); // 6
jbe@383 1712 lua_pushvalue(L, 2); // 7
jbe@383 1713 lua_call(L, 2, 1); // 5
jbe@383 1714 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1715 lua_settop(L, 2);
jbe/bsw@0 1716 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1717 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1718 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1719 lua_call(L, 2, 0);
jbe/bsw@0 1720 lua_settop(L, 2);
jbe/bsw@0 1721 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1722 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1723 lua_gettable(L, 3); // 4
jbe/bsw@0 1724 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1725 return 1;
jbe/bsw@0 1726 }
jbe@383 1727 lua_settop(L, 4);
jbe@415 1728 // check if proxy access to document in special column is enabled:
jbe@383 1729 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1730 if (lua_toboolean(L, 5)) {
jbe@415 1731 // if yes, then proxy access:
jbe@383 1732 lua_gettable(L, 4); // 5
jbe@383 1733 if (!lua_isnil(L, 5)) {
jbe@383 1734 lua_pushvalue(L, 2); // 6
jbe@383 1735 lua_gettable(L, 5); // 6
jbe@383 1736 }
jbe@415 1737 } else {
jbe@415 1738 // else use _data table:
jbe@415 1739 lua_pushvalue(L, 2); // 6
jbe@415 1740 lua_gettable(L, 4); // 6
jbe@383 1741 }
jbe@415 1742 return 1; // return element at stack position 5 or 6
jbe@23 1743 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1744 lua_settop(L, 3);
jbe/bsw@0 1745 // try inherited list attributes or methods:
jbe/bsw@0 1746 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1747 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1748 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1749 lua_gettable(L, 4); // 5
jbe/bsw@0 1750 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1751 lua_settop(L, 3);
jbe/bsw@0 1752 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1753 lua_rawget(L, 3); // 4
jbe/bsw@0 1754 lua_replace(L, 3);
jbe/bsw@0 1755 }
jbe/bsw@0 1756 }
jbe@23 1757 // return nothing:
jbe/bsw@0 1758 return 0;
jbe/bsw@0 1759 }
jbe/bsw@0 1760
jbe@23 1761 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1762 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1763 const char *result_type;
jbe@23 1764 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1765 lua_settop(L, 3);
jbe/bsw@0 1766 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1767 lua_rawset(L, 1);
jbe/bsw@0 1768 return 1;
jbe/bsw@0 1769 }
jbe@436 1770 // class on stack position 4:
jbe@384 1771 lua_settop(L, 3);
jbe/bsw@0 1772 lua_getfield(L, 1, "_class"); // 4
jbe@23 1773 // get value of "_type" attribute:
jbe/bsw@0 1774 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1775 result_type = lua_tostring(L, 5);
jbe@378 1776 // distinguish between lists and objects:
jbe@378 1777 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1778 lua_settop(L, 4);
jbe@378 1779 // try object setter functions:
jbe@384 1780 lua_pushvalue(L, 4); // 5
jbe@384 1781 while (lua_toboolean(L, 5)) {
jbe@384 1782 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1783 lua_pushvalue(L, 2); // 7
jbe@384 1784 lua_gettable(L, 6); // 7
jbe@384 1785 if (lua_toboolean(L, 7)) {
jbe@384 1786 lua_pushvalue(L, 1); // 8
jbe@384 1787 lua_pushvalue(L, 3); // 9
jbe@378 1788 lua_call(L, 2, 0);
jbe@378 1789 return 0;
jbe@378 1790 }
jbe@384 1791 lua_settop(L, 5);
jbe@384 1792 lua_pushliteral(L, "prototype"); // 6
jbe@384 1793 lua_rawget(L, 5); // 6
jbe@384 1794 lua_replace(L, 5);
jbe@378 1795 }
jbe@384 1796 lua_settop(L, 4);
jbe@384 1797 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1798 // check, if a object reference is changed:
jbe@384 1799 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1800 lua_pushvalue(L, 4); // 7
jbe@384 1801 lua_pushvalue(L, 2); // 8
jbe@384 1802 lua_call(L, 2, 1); // 6
jbe@384 1803 if (!lua_isnil(L, 6)) {
jbe@544 1804 // special handling of 1:1 references (primary side):
jbe@544 1805 lua_getfield(L, 6, "mode"); // 7
jbe@546 1806 if (lua_isstring(L, 7) && !strcmp(lua_tostring(L, 7), "11")) {
jbe@544 1807 lua_getfield(L, 6, "primary"); // 8
jbe@544 1808 if (lua_toboolean(L, 8)) {
jbe@544 1809 if (!lua_isnil(L, 3)) {
jbe@544 1810 // set backward reference:
jbe@547 1811 lua_getfield(L, 6, "back_ref"); // 9
jbe@547 1812 if (lua_toboolean(L, 9)) {
jbe@547 1813 lua_pushvalue(L, 1); // 10
jbe@547 1814 lua_settable(L, 3);
jbe@547 1815 }
jbe@544 1816 }
jbe@544 1817 // do nothing else:
jbe@544 1818 return 0;
jbe@544 1819 }
jbe@544 1820 }
jbe@545 1821 lua_settop(L, 6);
jbe/bsw@0 1822 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1823 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1824 lua_pushvalue(L, 2); // 8
jbe@384 1825 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1826 else lua_pushvalue(L, 3); // 9
jbe@384 1827 lua_settable(L, 7);
jbe@384 1828 lua_settop(L, 6);
jbe@544 1829 // special handling of 1:1 references (secondary side):
jbe@544 1830 lua_getfield(L, 6, "mode"); // 7
jbe@546 1831 if (lua_isstring(L, 7) && !strcmp(lua_tostring(L, 7), "11")) {
jbe@544 1832 lua_settop(L, 6);
jbe@544 1833 if (!lua_isnil(L, 3)) {
jbe@544 1834 // store object in other _ref table (use false for nil): // TODO: use special object instead of false
jbe@544 1835 lua_getfield(L, 3, "_ref"); // 7
jbe@547 1836 lua_getfield(L, 6, "back_ref"); // 8
jbe@547 1837 if (lua_toboolean(L, 8)) {
jbe@547 1838 lua_pushvalue(L, 1); // 9
jbe@547 1839 lua_settable(L, 7);
jbe@547 1840 }
jbe@544 1841 }
jbe@544 1842 }
jbe@544 1843 lua_settop(L, 6);
jbe/bsw@0 1844 // delete referencing key from _data table:
jbe@384 1845 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1846 if (lua_isnil(L, 7)) {
jbe/bsw@0 1847 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1848 }
jbe@384 1849 lua_pushvalue(L, 7); // 8
jbe@384 1850 lua_pushnil(L); // 9
jbe@384 1851 lua_settable(L, 5);
jbe@384 1852 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1853 lua_pushvalue(L, 7); // 9
jbe@384 1854 lua_pushboolean(L, 1); // 10
jbe@384 1855 lua_settable(L, 8);
jbe@384 1856 return 0;
jbe@384 1857 }
jbe@384 1858 lua_settop(L, 5);
jbe@384 1859 // check proxy access to document in special column:
jbe@384 1860 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1861 if (lua_toboolean(L, 6)) {
jbe@414 1862 lua_gettable(L, 5); // 6
jbe@414 1863 if (lua_isnil(L, 6)) {
jbe@414 1864 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1865 }
jbe@414 1866 lua_pushvalue(L, 2); // 7
jbe@414 1867 lua_pushvalue(L, 3); // 8
jbe@414 1868 lua_settable(L, 6);
jbe@414 1869 return 0;
jbe@384 1870 }
jbe@384 1871 lua_settop(L, 5);
jbe@384 1872 // store value in data field info:
jbe@384 1873 lua_pushvalue(L, 2); // 6
jbe@384 1874 lua_pushvalue(L, 3); // 7
jbe@384 1875 lua_settable(L, 5);
jbe@384 1876 lua_settop(L, 4);
jbe@384 1877 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1878 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1879 lua_pushvalue(L, 2); // 6
jbe@384 1880 lua_pushboolean(L, 1); // 7
jbe@384 1881 lua_settable(L, 5);
jbe@384 1882 lua_settop(L, 4);
jbe@384 1883 // reset reference cache, if neccessary:
jbe@384 1884 lua_pushcfunction(L,
jbe@384 1885 mondelefant_class_get_foreign_key_reference_name
jbe@384 1886 ); // 5
jbe@384 1887 lua_pushvalue(L, 4); // 6
jbe@384 1888 lua_pushvalue(L, 2); // 7
jbe@384 1889 lua_call(L, 2, 1); // 5
jbe@384 1890 if (!lua_isnil(L, 5)) {
jbe@384 1891 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1892 lua_pushvalue(L, 5); // 7
jbe@382 1893 lua_pushnil(L); // 8
jbe@382 1894 lua_settable(L, 6);
jbe/bsw@0 1895 }
jbe/bsw@0 1896 return 0;
jbe@23 1897 } else { // non-objects (i.e. lists)
jbe@23 1898 // perform rawset:
jbe/bsw@0 1899 lua_settop(L, 3);
jbe/bsw@0 1900 lua_rawset(L, 1);
jbe/bsw@0 1901 return 0;
jbe/bsw@0 1902 }
jbe/bsw@0 1903 }
jbe/bsw@0 1904
jbe@416 1905 // meta-method "__index" of column proxy:
jbe@416 1906 static int mondelefant_columns_index(lua_State *L) {
jbe@416 1907 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1908 lua_settop(L, 2);
jbe@416 1909 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 3
jbe@436 1910 // try primary keys of referenced objects:
jbe@436 1911 lua_pushcfunction(L,
jbe@436 1912 mondelefant_class_get_foreign_key_reference_name
jbe@436 1913 ); // 4
jbe@436 1914 lua_getfield(L, 3, "_class"); // 5
jbe@436 1915 lua_pushvalue(L, 2); // 6
jbe@436 1916 lua_call(L, 2, 1); // 4
jbe@436 1917 if (!lua_isnil(L, 4)) {
jbe@436 1918 // reference name at stack position 4
jbe@436 1919 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@436 1920 lua_getfield(L, 3, "_class"); // 6
jbe@436 1921 lua_pushvalue(L, 4); // 7
jbe@436 1922 lua_call(L, 2, 1); // reference info at stack position 5
jbe@436 1923 lua_getfield(L, 3, "_ref"); // 6
jbe@436 1924 lua_getfield(L, 5, "ref"); // 7
jbe@436 1925 lua_gettable(L, 6); // 7
jbe@436 1926 if (!lua_isnil(L, 7)) {
jbe@436 1927 if (lua_toboolean(L, 7)) {
jbe@436 1928 lua_getfield(L, 5, "that_key"); // 8
jbe@436 1929 if (lua_isnil(L, 8)) {
jbe@436 1930 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe@436 1931 }
jbe@436 1932 lua_gettable(L, 7); // 8
jbe@436 1933 } else {
jbe@436 1934 lua_pushnil(L);
jbe@436 1935 }
jbe@436 1936 return 1;
jbe@436 1937 }
jbe@436 1938 }
jbe@436 1939 lua_settop(L, 3);
jbe@436 1940 // if not successful, use _data table:
jbe@416 1941 lua_getfield(L, 3, "_data"); // 4
jbe@416 1942 lua_pushvalue(L, 2); // 5
jbe@416 1943 lua_gettable(L, 4); // 5
jbe@416 1944 return 1;
jbe@416 1945 }
jbe@416 1946
jbe@416 1947 // meta-method "__newindex" of column proxy:
jbe@416 1948 static int mondelefant_columns_newindex(lua_State *L) {
jbe@416 1949 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1950 lua_settop(L, 3);
jbe@416 1951 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 4
jbe@436 1952 // reset reference cache, if neccessary:
jbe@436 1953 lua_pushcfunction(L,
jbe@436 1954 mondelefant_class_get_foreign_key_reference_name
jbe@436 1955 ); // 5
jbe@436 1956 lua_getfield(L, 4, "_class"); // 6
jbe@436 1957 lua_pushvalue(L, 2); // 7
jbe@436 1958 lua_call(L, 2, 1); // 5
jbe@436 1959 if (!lua_isnil(L, 5)) {
jbe@436 1960 lua_getfield(L, 4, "_ref"); // 6
jbe@436 1961 lua_pushvalue(L, 5); // 7
jbe@436 1962 lua_pushnil(L); // 8
jbe@436 1963 lua_settable(L, 6);
jbe@436 1964 }
jbe@436 1965 lua_settop(L, 4);
jbe@436 1966 // set _data and _dirty:
jbe@416 1967 lua_getfield(L, 4, "_data"); // 5
jbe@416 1968 lua_getfield(L, 4, "_dirty"); // 6
jbe@416 1969 lua_pushvalue(L, 2);
jbe@416 1970 lua_pushvalue(L, 3);
jbe@416 1971 lua_settable(L, 5);
jbe@416 1972 lua_pushvalue(L, 2);
jbe@416 1973 lua_pushboolean(L, 1);
jbe@416 1974 lua_settable(L, 6);
jbe@416 1975 return 0;
jbe@416 1976 }
jbe@416 1977
jbe@23 1978 // meta-method "__index" of classes (models):
jbe/bsw@0 1979 static int mondelefant_class_index(lua_State *L) {
jbe@23 1980 // perform lookup in prototype:
jbe/bsw@0 1981 lua_settop(L, 2);
jbe/bsw@0 1982 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1983 lua_rawget(L, 1); // 3
jbe/bsw@0 1984 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1985 lua_gettable(L, 3); // 4
jbe/bsw@0 1986 return 1;
jbe/bsw@0 1987 }
jbe/bsw@0 1988
jbe@23 1989 // registration information for functions of library:
jbe/bsw@0 1990 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1991 {"connect", mondelefant_connect},
jbe/bsw@0 1992 {"set_class", mondelefant_set_class},
jbe/bsw@0 1993 {"new_class", mondelefant_new_class},
jbe/bsw@0 1994 {NULL, NULL}
jbe/bsw@0 1995 };
jbe/bsw@0 1996
jbe@23 1997 // registration information for meta-methods of database connections:
jbe/bsw@0 1998 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1999 {"__gc", mondelefant_conn_free},
jbe/bsw@0 2000 {"__index", mondelefant_conn_index},
jbe/bsw@0 2001 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 2002 {NULL, NULL}
jbe/bsw@0 2003 };
jbe/bsw@0 2004
jbe@23 2005 // registration information for methods of database connections:
jbe/bsw@0 2006 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 2007 {"close", mondelefant_conn_close},
jbe/bsw@0 2008 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 2009 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@397 2010 {"try_wait", mondelefant_conn_try_wait},
jbe@393 2011 {"wait", mondelefant_conn_wait},
jbe/bsw@0 2012 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 2013 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 2014 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 2015 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 2016 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 2017 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 2018 {"query", mondelefant_conn_query},
jbe/bsw@0 2019 {NULL, NULL}
jbe/bsw@0 2020 };
jbe/bsw@0 2021
jbe@23 2022 // registration information for meta-methods of error objects:
jbe/bsw@0 2023 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe@472 2024 {"__tostring", mondelefant_errorobject_tostring},
jbe/bsw@0 2025 {NULL, NULL}
jbe/bsw@0 2026 };
jbe/bsw@0 2027
jbe@23 2028 // registration information for methods of error objects:
jbe/bsw@0 2029 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe@397 2030 {"escalate", lua_error},
jbe/bsw@0 2031 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 2032 {NULL, NULL}
jbe/bsw@0 2033 };
jbe/bsw@0 2034
jbe@23 2035 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 2036 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 2037 {"__index", mondelefant_result_index},
jbe/bsw@0 2038 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 2039 {NULL, NULL}
jbe/bsw@0 2040 };
jbe/bsw@0 2041
jbe@416 2042 // registration information for meta-methods of classes (models):
jbe/bsw@0 2043 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 2044 {"__index", mondelefant_class_index},
jbe/bsw@0 2045 {NULL, NULL}
jbe/bsw@0 2046 };
jbe/bsw@0 2047
jbe@23 2048 // registration information for methods of classes (models):
jbe/bsw@0 2049 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 2050 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 2051 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 2052 {"get_foreign_key_reference_name",
jbe/bsw@0 2053 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 2054 {NULL, NULL}
jbe/bsw@0 2055 };
jbe/bsw@0 2056
jbe@23 2057 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 2058 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 2059 {NULL, NULL}
jbe/bsw@0 2060 };
jbe/bsw@0 2061
jbe@23 2062 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 2063 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 2064 {NULL, NULL}
jbe/bsw@0 2065 };
jbe/bsw@0 2066
jbe@416 2067 // registration information for meta-methods of column proxy:
jbe@416 2068 static const struct luaL_Reg mondelefant_columns_mt_functions[] = {
jbe@416 2069 {"__index", mondelefant_columns_index},
jbe@416 2070 {"__newindex", mondelefant_columns_newindex},
jbe@416 2071 {NULL, NULL}
jbe@416 2072 };
jbe@416 2073
jbe@23 2074 // luaopen function to initialize/register library:
jbe/bsw@0 2075 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 2076 lua_settop(L, 0);
jbe@416 2077
jbe@416 2078 lua_newtable(L); // meta-table for columns proxy
jbe@416 2079 luaL_setfuncs(L, mondelefant_columns_mt_functions, 0);
jbe@416 2080 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 2081
jbe/bsw@0 2082 lua_newtable(L); // module at stack position 1
jbe@64 2083 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe/bsw@0 2084
jbe/bsw@0 2085 lua_pushvalue(L, 1); // 2
jbe/bsw@0 2086 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 2087
jbe/bsw@0 2088 lua_newtable(L); // 2
jbe/bsw@0 2089 // NOTE: only PostgreSQL is supported yet:
jbe@64 2090 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe/bsw@0 2091 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 2092 lua_newtable(L); // 2
jbe/bsw@0 2093 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 2094
jbe/bsw@0 2095 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 2096 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe/bsw@0 2097 lua_settop(L, 1);
jbe/bsw@0 2098 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 2099 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe/bsw@0 2100 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 2101 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 2102 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe/bsw@0 2103 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 2104
jbe/bsw@0 2105 lua_newtable(L); // 2
jbe@272 2106 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe/bsw@0 2107 lua_newtable(L); // 3
jbe@64 2108 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe/bsw@0 2109 lua_setfield(L, 2, "object");
jbe/bsw@0 2110 lua_newtable(L); // 3
jbe/bsw@0 2111 lua_setfield(L, 2, "object_get");
jbe/bsw@0 2112 lua_newtable(L); // 3
jbe/bsw@0 2113 lua_setfield(L, 2, "object_set");
jbe/bsw@0 2114 lua_newtable(L); // 3
jbe@64 2115 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe/bsw@0 2116 lua_setfield(L, 2, "list");
jbe/bsw@0 2117 lua_newtable(L); // 3
jbe/bsw@0 2118 lua_setfield(L, 2, "references");
jbe/bsw@0 2119 lua_newtable(L); // 3
jbe/bsw@0 2120 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 2121 lua_pushvalue(L, 2); // 3
jbe/bsw@0 2122 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 2123 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 2124
jbe/bsw@0 2125 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 2126 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe/bsw@0 2127 lua_newtable(L); // 3
jbe@64 2128 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe/bsw@0 2129 lua_setfield(L, 2, "__index");
jbe/bsw@0 2130 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 2131
jbe/bsw@0 2132 return 1;
jbe/bsw@0 2133 }

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