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annotate libraries/mondelefant/mondelefant_native.c @ 547:75fd8869bc4e

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Further bugfixes regarding 1:1 references
author jbe
date Sat Oct 19 20:45:35 2019 +0200 (2019-10-19)
parents d5bad374641e
children a006593b747c
rev   line source
jbe/bsw@0 1 #include <lua.h>
jbe/bsw@0 2 #include <lauxlib.h>
jbe/bsw@0 3 #include <libpq-fe.h>
jbe/bsw@0 4 #include <postgres.h>
jbe/bsw@0 5 #include <catalog/pg_type.h>
jbe/bsw@0 6 #include <stdint.h>
jbe@393 7 #include <time.h>
jbe/bsw@0 8
jbe@23 9 // NOTE: Comments with format "// <number>" denote the Lua stack position
jbe@23 10
jbe@23 11 // prefix for all Lua registry entries of this library:
jbe@402 12 #define MONDELEFANT_REGKEY "mondelefant_"
jbe/bsw@0 13
jbe@23 14 // registry key of module "mondelefant_native":
jbe@23 15 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module")
jbe@23 16 // registry key of meta-table for database connections:
jbe@23 17 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection")
jbe@23 18 // registry key of meta-table for database result lists and objects:
jbe@23 19 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result")
jbe@23 20 // registry key of meta-table for database error objects:
jbe@23 21 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject")
jbe@23 22 // registry key of meta-table for models (named classes here):
jbe@23 23 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class")
jbe@23 24 // registry key of default prototype for models/classes:
jbe@23 25 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto")
jbe@416 26 // registry key of meta-table for column proxy:
jbe@416 27 #define MONDELEFANT_COLUMNS_MT_REGKEY (MONDELEFANT_REGKEY "columns")
jbe@416 28 // table (lightuserdata) key to store result object in column proxy:
jbe@416 29 // (address of struct used as unique reference)
jbe@416 30 #define MONDELEFANT_COLUMNS_RESULT_LUKEY ((void *)&mondelefant_columns_result_lukey_dummy)
jbe@416 31
jbe@416 32 // dummy variable for MONDELEFANT_COLUMNS_RESULT_LUKEY reference:
jbe@416 33 char mondelefant_columns_result_lukey_dummy;
jbe/bsw@0 34
jbe@23 35 // C-structure for database connection userdata:
jbe/bsw@0 36 typedef struct {
jbe/bsw@0 37 PGconn *pgconn;
jbe/bsw@0 38 int server_encoding;
jbe@408 39 void *todo_PQfreemem;
jbe@408 40 PGresult *todo_PQclear;
jbe/bsw@0 41 } mondelefant_conn_t;
jbe@23 42 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
jbe@23 43 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
jbe/bsw@0 44
jbe@23 45 // transform codepoint-position to byte-position for a given UTF-8 string:
jbe/bsw@0 46 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
jbe/bsw@0 47 size_t bytepos;
jbe/bsw@0 48 for (bytepos = 0; utf8pos > 0; bytepos++) {
jbe/bsw@0 49 uint8_t c;
jbe/bsw@0 50 c = ((const uint8_t *)str)[bytepos];
jbe/bsw@0 51 if (!c) break;
jbe/bsw@0 52 if (c <= 0x7f || c >= 0xc0) utf8pos--;
jbe/bsw@0 53 }
jbe/bsw@0 54 return bytepos;
jbe/bsw@0 55 }
jbe/bsw@0 56
jbe@23 57 // PostgreSQL's OID for binary data type (bytea):
jbe/bsw@0 58 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
jbe/bsw@0 59
jbe@23 60 // mapping a PostgreSQL type given by its OID to a string identifier:
jbe/bsw@0 61 static const char *mondelefant_oid_to_typestr(Oid oid) {
jbe/bsw@0 62 switch (oid) {
jbe/bsw@0 63 case 16: return "bool";
jbe/bsw@0 64 case 17: return "bytea";
jbe/bsw@0 65 case 18: return "char";
jbe/bsw@0 66 case 19: return "name";
jbe/bsw@0 67 case 20: return "int8";
jbe/bsw@0 68 case 21: return "int2";
jbe/bsw@0 69 case 23: return "int4";
jbe/bsw@0 70 case 25: return "text";
jbe/bsw@0 71 case 26: return "oid";
jbe/bsw@0 72 case 27: return "tid";
jbe/bsw@0 73 case 28: return "xid";
jbe/bsw@0 74 case 29: return "cid";
jbe@176 75 case 114: return "json";
jbe/bsw@0 76 case 600: return "point";
jbe/bsw@0 77 case 601: return "lseg";
jbe/bsw@0 78 case 602: return "path";
jbe/bsw@0 79 case 603: return "box";
jbe/bsw@0 80 case 604: return "polygon";
jbe/bsw@0 81 case 628: return "line";
jbe/bsw@0 82 case 700: return "float4";
jbe/bsw@0 83 case 701: return "float8";
jbe/bsw@0 84 case 705: return "unknown";
jbe/bsw@0 85 case 718: return "circle";
jbe/bsw@0 86 case 790: return "money";
jbe/bsw@0 87 case 829: return "macaddr";
jbe/bsw@0 88 case 869: return "inet";
jbe/bsw@0 89 case 650: return "cidr";
jbe/bsw@0 90 case 1042: return "bpchar";
jbe/bsw@0 91 case 1043: return "varchar";
jbe/bsw@0 92 case 1082: return "date";
jbe/bsw@0 93 case 1083: return "time";
jbe/bsw@0 94 case 1114: return "timestamp";
jbe/bsw@0 95 case 1184: return "timestamptz";
jbe/bsw@0 96 case 1186: return "interval";
jbe/bsw@0 97 case 1266: return "timetz";
jbe/bsw@0 98 case 1560: return "bit";
jbe/bsw@0 99 case 1562: return "varbit";
jbe/bsw@0 100 case 1700: return "numeric";
jbe@176 101 case 3802: return "jsonb";
jbe/bsw@0 102 default: return NULL;
jbe/bsw@0 103 }
jbe/bsw@0 104 }
jbe/bsw@0 105
jbe@23 106 // This library maps PostgreSQL's error codes to CamelCase string
jbe@23 107 // identifiers, which consist of CamelCase identifiers and are seperated
jbe@23 108 // by dots (".") (no leading or trailing dots).
jbe@23 109 // There are additional error identifiers which do not have a corresponding
jbe@23 110 // PostgreSQL error associated with it.
jbe@23 111
jbe@23 112 // matching start of local variable 'pgcode' against string 'incode',
jbe@23 113 // returning string 'outcode' on match:
jbe/bsw@0 114 #define mondelefant_errcode_item(incode, outcode) \
jbe/bsw@0 115 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
jbe/bsw@0 116
jbe@23 117 // additional error identifiers without corresponding PostgreSQL error:
jbe/bsw@0 118 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
jbe/bsw@0 119 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
jbe/bsw@0 120 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
jbe/bsw@0 121 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
jbe/bsw@0 122 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
jbe/bsw@0 123 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
jbe/bsw@0 124
jbe@23 125 // mapping PostgreSQL error code to error code as returned by this library:
jbe/bsw@0 126 static const char *mondelefant_translate_errcode(const char *pgcode) {
jbe/bsw@0 127 if (!pgcode) abort(); // should not happen
jbe/bsw@0 128 mondelefant_errcode_item("02", "NoData")
jbe/bsw@0 129 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
jbe/bsw@0 130 mondelefant_errcode_item("08", "ConnectionException")
jbe/bsw@0 131 mondelefant_errcode_item("09", "TriggeredActionException")
jbe/bsw@0 132 mondelefant_errcode_item("0A", "FeatureNotSupported")
jbe/bsw@0 133 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
jbe/bsw@0 134 mondelefant_errcode_item("0F", "LocatorException")
jbe/bsw@0 135 mondelefant_errcode_item("0L", "InvalidGrantor")
jbe/bsw@0 136 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
jbe/bsw@0 137 mondelefant_errcode_item("21", "CardinalityViolation")
jbe/bsw@0 138 mondelefant_errcode_item("22", "DataException")
jbe/bsw@0 139 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
jbe/bsw@0 140 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
jbe/bsw@0 141 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
jbe/bsw@0 142 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
jbe/bsw@0 143 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
jbe/bsw@0 144 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
jbe/bsw@0 145 mondelefant_errcode_item("24", "InvalidCursorState")
jbe/bsw@0 146 mondelefant_errcode_item("25", "InvalidTransactionState")
jbe/bsw@0 147 mondelefant_errcode_item("26", "InvalidSqlStatementName")
jbe/bsw@0 148 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
jbe/bsw@0 149 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
jbe/bsw@0 150 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
jbe/bsw@0 151 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
jbe/bsw@0 152 mondelefant_errcode_item("2F", "SqlRoutineException")
jbe/bsw@0 153 mondelefant_errcode_item("34", "InvalidCursorName")
jbe/bsw@0 154 mondelefant_errcode_item("38", "ExternalRoutineException")
jbe/bsw@0 155 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
jbe/bsw@0 156 mondelefant_errcode_item("3B", "SavepointException")
jbe/bsw@0 157 mondelefant_errcode_item("3D", "InvalidCatalogName")
jbe/bsw@0 158 mondelefant_errcode_item("3F", "InvalidSchemaName")
jbe/bsw@0 159 mondelefant_errcode_item("40", "TransactionRollback")
jbe/bsw@0 160 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
jbe/bsw@0 161 mondelefant_errcode_item("44", "WithCheckOptionViolation")
jbe/bsw@0 162 mondelefant_errcode_item("53", "InsufficientResources")
jbe/bsw@0 163 mondelefant_errcode_item("54", "ProgramLimitExceeded")
jbe/bsw@0 164 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
jbe/bsw@0 165 mondelefant_errcode_item("57", "OperatorIntervention")
jbe/bsw@0 166 mondelefant_errcode_item("58", "SystemError")
jbe/bsw@0 167 mondelefant_errcode_item("F0", "ConfigurationFileError")
jbe/bsw@0 168 mondelefant_errcode_item("P0", "PlpgsqlError")
jbe/bsw@0 169 mondelefant_errcode_item("XX", "InternalError")
jbe/bsw@0 170 return "unknown";
jbe/bsw@0 171 }
jbe/bsw@0 172
jbe@23 173 // C-function, checking if a given error code (as defined by this library)
jbe@23 174 // is belonging to a certain class of errors (strings are equal or error
jbe@23 175 // code begins with error class followed by a dot):
jbe/bsw@0 176 static int mondelefant_check_error_class(
jbe/bsw@0 177 const char *errcode, const char *errclass
jbe/bsw@0 178 ) {
jbe/bsw@0 179 size_t i = 0;
jbe/bsw@0 180 while (1) {
jbe/bsw@0 181 if (errclass[i] == 0) {
jbe/bsw@0 182 if (errcode[i] == 0 || errcode[i] == '.') return 1;
jbe/bsw@0 183 else return 0;
jbe/bsw@0 184 }
jbe/bsw@0 185 if (errcode[i] != errclass[i]) return 0;
jbe/bsw@0 186 i++;
jbe/bsw@0 187 }
jbe/bsw@0 188 }
jbe/bsw@0 189
jbe@23 190 // pushing first line of a string on Lua's stack (without trailing CR/LF):
jbe/bsw@0 191 static void mondelefant_push_first_line(lua_State *L, const char *str) {
jbe/bsw@0 192 size_t i = 0;
jbe/bsw@0 193 if (!str) abort(); // should not happen
jbe/bsw@0 194 while (1) {
jbe@397 195 char c = str[i];
jbe@397 196 if (c == '\n' || c == '\r' || c == 0) {
jbe@397 197 lua_pushlstring(L, str, i);
jbe@397 198 return;
jbe@397 199 }
jbe/bsw@0 200 i++;
jbe@397 201 }
jbe/bsw@0 202 }
jbe/bsw@0 203
jbe@23 204 // "connect" function of library, which establishes a database connection
jbe@23 205 // and returns a database connection handle:
jbe/bsw@0 206 static int mondelefant_connect(lua_State *L) {
jbe@23 207 const char *conninfo; // string for PQconnectdb function
jbe@23 208 mondelefant_conn_t *conn; // C-structure for userdata
jbe@402 209 // check if string is given as first argument:
jbe@402 210 if (lua_type(L, 1) != LUA_TSTRING) {
jbe@402 211 // expect a table as first argument if no string is given:
jbe@402 212 luaL_checktype(L, 1, LUA_TTABLE);
jbe@406 213 // extract conninfo string for PQconnectdb if possible:
jbe@406 214 lua_getfield(L, 1, "conninfo");
jbe@406 215 if (!lua_isnil(L, -1)) {
jbe@402 216 // if yes, use that value but check its type:
jbe@406 217 luaL_argcheck(L, lua_type(L, -1) == LUA_TSTRING, 1, "\"conninfo\" value is not a string");
jbe@402 218 } else {
jbe@402 219 // otherwise assemble conninfo string from the named options:
jbe@402 220 luaL_Buffer buf;
jbe@40 221 int need_seperator = 0;
jbe@402 222 const char *value;
jbe@402 223 size_t value_len;
jbe@422 224 size_t value_pos;
jbe@402 225 lua_settop(L, 1);
jbe@402 226 lua_pushnil(L); // slot for key at stack position 2
jbe@402 227 lua_pushnil(L); // slot for value at stack position 3
jbe@402 228 luaL_buffinit(L, &buf);
jbe@40 229 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
jbe@402 230 luaL_argcheck(L, lua_isstring(L, -2), 1, "key in table is not a string");
jbe@420 231 value = luaL_tolstring(L, -1, &value_len);
jbe@40 232 lua_replace(L, 3);
jbe@402 233 lua_pop(L, 1);
jbe@40 234 lua_replace(L, 2);
jbe@402 235 if (need_seperator) luaL_addchar(&buf, ' ');
jbe@40 236 // NOTE: numbers will be converted to strings automatically here,
jbe@40 237 // but perhaps this will change in future versions of lua
jbe@40 238 lua_pushvalue(L, 2);
jbe@402 239 luaL_addvalue(&buf);
jbe@402 240 luaL_addchar(&buf, '=');
jbe@402 241 luaL_addchar(&buf, '\'');
jbe@422 242 value_pos = 0;
jbe@402 243 do {
jbe@402 244 char c;
jbe@402 245 c = value[value_pos++];
jbe@402 246 if (c == '\'') luaL_addchar(&buf, '\\');
jbe@402 247 luaL_addchar(&buf, c);
jbe@402 248 } while (value_pos < value_len);
jbe@402 249 luaL_addchar(&buf, '\'');
jbe@402 250 need_seperator = 1;
jbe/bsw@0 251 }
jbe@402 252 luaL_pushresult(&buf);
jbe/bsw@0 253 }
jbe@420 254 // ensure that string is on stack position 1:
jbe@402 255 lua_replace(L, 1);
jbe/bsw@0 256 }
jbe@402 257 // use conninfo string on stack position 1:
jbe@402 258 conninfo = lua_tostring(L, 1);
jbe@423 259 // create (zero'ed) userdata on stack position 2:
jbe@406 260 lua_settop(L, 1);
jbe@423 261 conn = memset(lua_newuserdata(L, sizeof(*conn)), 0, sizeof(*conn)); // 2
jbe@23 262 // call PQconnectdb function of libpq:
jbe@406 263 conn->pgconn = PQconnectdb(conninfo);
jbe@406 264 // try emergency garbage collection on first failure:
jbe@406 265 if (!conn->pgconn) {
jbe@406 266 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@406 267 conn->pgconn = PQconnectdb(conninfo);
jbe@407 268 // throw error in case of (unexpected) error of PQconnectdb call:
jbe@407 269 if (!conn->pgconn) return luaL_error(L,
jbe@407 270 "Error in libpq while creating 'PGconn' structure."
jbe@407 271 );
jbe/bsw@0 272 }
jbe@406 273 // set metatable for userdata (ensure PQfinish on unexpected error below):
jbe@406 274 luaL_setmetatable(L, MONDELEFANT_CONN_MT_REGKEY);
jbe@406 275 // check result of PQconnectdb call:
jbe@406 276 if (PQstatus(conn->pgconn) != CONNECTION_OK) {
jbe@406 277 lua_pushnil(L); // 3
jbe@406 278 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 4
jbe@406 279 lua_newtable(L); // 5
jbe@406 280 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 281 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@406 282 lua_setfield(L, 5, "code");
jbe@406 283 lua_pushvalue(L, 4);
jbe@406 284 lua_setfield(L, 5, "message");
jbe@406 285 // manual PQfinish (do not wait until garbage collection):
jbe@406 286 PQfinish(conn->pgconn);
jbe@406 287 conn->pgconn = NULL;
jbe/bsw@0 288 return 3;
jbe/bsw@0 289 }
jbe@23 290 // set 'server_encoding' in C-struct of userdata:
jbe/bsw@0 291 {
jbe/bsw@0 292 const char *charset;
jbe@406 293 charset = PQparameterStatus(conn->pgconn, "server_encoding");
jbe/bsw@0 294 if (charset && !strcmp(charset, "UTF8")) {
jbe/bsw@0 295 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
jbe/bsw@0 296 } else {
jbe/bsw@0 297 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
jbe/bsw@0 298 }
jbe/bsw@0 299 }
jbe@396 300 // create and associate userdata table:
jbe@396 301 lua_newtable(L);
jbe@406 302 lua_setuservalue(L, 2);
jbe@396 303 // store key "fd" with file descriptor of connection:
jbe@406 304 lua_pushinteger(L, PQsocket(conn->pgconn));
jbe@406 305 lua_setfield(L, 2, "fd");
jbe@23 306 // store key "engine" with value "postgresql" as connection specific data:
jbe/bsw@0 307 lua_pushliteral(L, "postgresql");
jbe@406 308 lua_setfield(L, 2, "engine");
jbe@23 309 // return userdata:
jbe/bsw@0 310 return 1;
jbe/bsw@0 311 }
jbe/bsw@0 312
jbe@23 313 // returns pointer to libpq handle 'pgconn' of userdata at given index
jbe@23 314 // (or throws error, if database connection has been closed):
jbe/bsw@0 315 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
jbe/bsw@0 316 mondelefant_conn_t *conn;
jbe/bsw@0 317 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
jbe/bsw@0 318 if (!conn->pgconn) {
jbe/bsw@0 319 luaL_error(L, "PostgreSQL connection has been closed.");
jbe/bsw@0 320 return NULL;
jbe/bsw@0 321 }
jbe/bsw@0 322 return conn;
jbe/bsw@0 323 }
jbe/bsw@0 324
jbe@23 325 // meta-method "__index" of database handles (userdata):
jbe/bsw@0 326 static int mondelefant_conn_index(lua_State *L) {
jbe@23 327 // try table for connection specific data:
jbe/bsw@0 328 lua_settop(L, 2);
jbe@396 329 lua_getuservalue(L, 1); // 3
jbe/bsw@0 330 lua_pushvalue(L, 2); // 4
jbe/bsw@0 331 lua_gettable(L, 3); // 4
jbe/bsw@0 332 if (!lua_isnil(L, 4)) return 1;
jbe@23 333 // try to use prototype stored in connection specific data:
jbe/bsw@0 334 lua_settop(L, 3);
jbe/bsw@0 335 lua_getfield(L, 3, "prototype"); // 4
jbe/bsw@0 336 if (lua_toboolean(L, 4)) {
jbe/bsw@0 337 lua_pushvalue(L, 2); // 5
jbe/bsw@0 338 lua_gettable(L, 4); // 5
jbe/bsw@0 339 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 340 }
jbe@23 341 // try to use "postgresql_connection_prototype" of library:
jbe/bsw@0 342 lua_settop(L, 2);
jbe/bsw@0 343 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
jbe/bsw@0 344 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
jbe/bsw@0 345 if (lua_toboolean(L, 4)) {
jbe/bsw@0 346 lua_pushvalue(L, 2); // 5
jbe/bsw@0 347 lua_gettable(L, 4); // 5
jbe/bsw@0 348 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 349 }
jbe@23 350 // try to use "connection_prototype" of library:
jbe/bsw@0 351 lua_settop(L, 3);
jbe/bsw@0 352 lua_getfield(L, 3, "connection_prototype"); // 4
jbe/bsw@0 353 if (lua_toboolean(L, 4)) {
jbe/bsw@0 354 lua_pushvalue(L, 2); // 5
jbe/bsw@0 355 lua_gettable(L, 4); // 5
jbe/bsw@0 356 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 357 }
jbe@23 358 // give up and return nothing:
jbe/bsw@0 359 return 0;
jbe/bsw@0 360 }
jbe/bsw@0 361
jbe@23 362 // meta-method "__newindex" of database handles (userdata):
jbe/bsw@0 363 static int mondelefant_conn_newindex(lua_State *L) {
jbe@23 364 // store key-value pair in table for connection specific data:
jbe/bsw@0 365 lua_settop(L, 3);
jbe@396 366 lua_getuservalue(L, 1); // 4
jbe/bsw@0 367 lua_pushvalue(L, 2);
jbe/bsw@0 368 lua_pushvalue(L, 3);
jbe/bsw@0 369 lua_settable(L, 4);
jbe@23 370 // return nothing:
jbe/bsw@0 371 return 0;
jbe/bsw@0 372 }
jbe/bsw@0 373
jbe@23 374 // meta-method "__gc" of database handles:
jbe/bsw@0 375 static int mondelefant_conn_free(lua_State *L) {
jbe/bsw@0 376 mondelefant_conn_t *conn;
jbe/bsw@0 377 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@410 378 if (conn->todo_PQfreemem) {
jbe@410 379 PQfreemem(conn->todo_PQfreemem);
jbe@410 380 conn->todo_PQfreemem = NULL;
jbe@410 381 }
jbe@410 382 if (conn->todo_PQclear) {
jbe@410 383 PQclear(conn->todo_PQclear);
jbe@410 384 conn->todo_PQclear = NULL;
jbe@410 385 }
jbe@410 386 if (conn->pgconn) {
jbe@410 387 PQfinish(conn->pgconn);
jbe@410 388 conn->pgconn = NULL;
jbe@410 389 }
jbe/bsw@0 390 return 0;
jbe/bsw@0 391 }
jbe/bsw@0 392
jbe@23 393 // method "close" of database handles:
jbe/bsw@0 394 static int mondelefant_conn_close(lua_State *L) {
jbe/bsw@0 395 mondelefant_conn_t *conn;
jbe/bsw@0 396 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 397 PQfinish(conn->pgconn);
jbe/bsw@0 398 conn->pgconn = NULL;
jbe@397 399 lua_pushnil(L);
jbe@396 400 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
jbe/bsw@0 401 return 0;
jbe/bsw@0 402 }
jbe/bsw@0 403
jbe@23 404 // method "is_okay" of database handles:
jbe/bsw@0 405 static int mondelefant_conn_is_ok(lua_State *L) {
jbe/bsw@0 406 mondelefant_conn_t *conn;
jbe/bsw@0 407 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 408 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
jbe/bsw@0 409 return 1;
jbe/bsw@0 410 }
jbe/bsw@0 411
jbe@23 412 // method "get_transaction_status" of database handles:
jbe/bsw@0 413 static int mondelefant_conn_get_transaction_status(lua_State *L) {
jbe/bsw@0 414 mondelefant_conn_t *conn;
jbe/bsw@0 415 conn = mondelefant_get_conn(L, 1);
jbe/bsw@0 416 switch (PQtransactionStatus(conn->pgconn)) {
jbe/bsw@0 417 case PQTRANS_IDLE:
jbe/bsw@0 418 lua_pushliteral(L, "idle");
jbe/bsw@0 419 break;
jbe/bsw@0 420 case PQTRANS_ACTIVE:
jbe/bsw@0 421 lua_pushliteral(L, "active");
jbe/bsw@0 422 break;
jbe/bsw@0 423 case PQTRANS_INTRANS:
jbe/bsw@0 424 lua_pushliteral(L, "intrans");
jbe/bsw@0 425 break;
jbe/bsw@0 426 case PQTRANS_INERROR:
jbe/bsw@0 427 lua_pushliteral(L, "inerror");
jbe/bsw@0 428 break;
jbe/bsw@0 429 default:
jbe/bsw@0 430 lua_pushliteral(L, "unknown");
jbe/bsw@0 431 }
jbe/bsw@0 432 return 1;
jbe/bsw@0 433 }
jbe/bsw@0 434
jbe@397 435 // method "try_wait" of database handles:
jbe@397 436 static int mondelefant_conn_try_wait(lua_State *L) {
jbe@393 437 mondelefant_conn_t *conn;
jbe@393 438 int infinite, nonblock = 0;
jbe@393 439 struct timespec wakeup;
jbe@393 440 int fd;
jbe@393 441 fd_set fds;
jbe@393 442 conn = mondelefant_get_conn(L, 1);
jbe@393 443 infinite = lua_isnoneornil(L, 2);
jbe@393 444 if (!infinite) {
jbe@393 445 lua_Number n;
jbe@393 446 int isnum;
jbe@393 447 n = lua_tonumberx(L, 2, &isnum);
jbe@393 448 if (isnum && n>0 && n<=86400*366) {
jbe@393 449 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
jbe@393 450 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 451 }
jbe@393 452 wakeup.tv_sec += n;
jbe@393 453 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
jbe@393 454 if (wakeup.tv_nsec >= 1000000000) {
jbe@393 455 wakeup.tv_sec += 1;
jbe@393 456 wakeup.tv_nsec -= 1000000000;
jbe@393 457 }
jbe@393 458 } else if (isnum && n==0) {
jbe@393 459 nonblock = 1;
jbe@393 460 } else {
jbe@393 461 luaL_argcheck(L, 0, 2, "not a valid timeout");
jbe@393 462 }
jbe@393 463 }
jbe@397 464 lua_settop(L, 1);
jbe@393 465 if (!nonblock) {
jbe@393 466 fd = PQsocket(conn->pgconn);
jbe@393 467 FD_ZERO(&fds);
jbe@393 468 FD_SET(fd, &fds);
jbe@393 469 }
jbe@393 470 while (true) {
jbe@393 471 {
jbe@393 472 PGnotify *notify;
jbe@393 473 if (!PQconsumeInput(conn->pgconn)) {
jbe@397 474 lua_newtable(L); // 2
jbe@406 475 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe@397 476 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe@397 477 lua_setfield(L, 2, "code");
jbe@397 478 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 3
jbe@397 479 lua_setfield(L, 2, "message");
jbe@397 480 return 1;
jbe@393 481 }
jbe@412 482 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 483 if (conn->todo_PQfreemem) {
jbe@412 484 PQfreemem(conn->todo_PQfreemem);
jbe@412 485 conn->todo_PQfreemem = NULL;
jbe@412 486 }
jbe@393 487 notify = PQnotifies(conn->pgconn);
jbe@393 488 if (notify) {
jbe@412 489 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@412 490 conn->todo_PQfreemem = notify;
jbe@412 491 // do Lua operations:
jbe@397 492 lua_pushnil(L);
jbe@393 493 lua_pushstring(L, notify->relname);
jbe@393 494 lua_pushstring(L, notify->extra);
jbe@393 495 lua_pushinteger(L, notify->be_pid);
jbe@412 496 // free memory allocated by PQnotifies:
jbe@393 497 PQfreemem(notify);
jbe@412 498 // avoid double call of PQfreemem later:
jbe@412 499 conn->todo_PQfreemem = NULL;
jbe@397 500 return 4;
jbe@393 501 }
jbe@393 502 }
jbe@393 503 if (infinite) {
jbe@393 504 select(fd+1, &fds, NULL, NULL, NULL);
jbe@393 505 } else if (nonblock) {
jbe@393 506 break;
jbe@393 507 } else {
jbe@393 508 struct timespec tp;
jbe@393 509 struct timeval timeout = { 0, };
jbe@393 510 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@393 511 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@393 512 }
jbe@393 513 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
jbe@393 514 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
jbe@393 515 if (tp.tv_nsec < 0) {
jbe@393 516 tp.tv_sec -= 1;
jbe@393 517 tp.tv_nsec += 1000000000;
jbe@393 518 }
jbe@393 519 timeout.tv_sec = tp.tv_sec;
jbe@393 520 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
jbe@393 521 if (
jbe@393 522 timeout.tv_sec < 0 ||
jbe@393 523 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
jbe@393 524 ) break;
jbe@393 525 select(fd+1, &fds, NULL, NULL, &timeout);
jbe@393 526 }
jbe@393 527 }
jbe@397 528 lua_pushnil(L);
jbe@397 529 lua_pushnil(L);
jbe@393 530 return 2;
jbe@393 531 }
jbe@393 532
jbe@23 533 // method "create_list" of database handles:
jbe/bsw@0 534 static int mondelefant_conn_create_list(lua_State *L) {
jbe@23 535 // ensure that first argument is a database connection:
jbe/bsw@0 536 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@440 537 // if no second argument is given, use an empty table:
jbe@440 538 if (lua_isnoneornil(L, 2)) {
jbe@440 539 lua_settop(L, 1);
jbe@440 540 lua_newtable(L); // 2
jbe@440 541 } else {
jbe@440 542 luaL_checktype(L, 2, LUA_TTABLE);
jbe@440 543 lua_settop(L, 2);
jbe@440 544 }
jbe@23 545 // set meta-table for database result lists/objects:
jbe@406 546 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 547 // set "_connection" attribute to self:
jbe/bsw@0 548 lua_pushvalue(L, 1); // 3
jbe/bsw@0 549 lua_setfield(L, 2, "_connection");
jbe@23 550 // set "_type" attribute to string "list":
jbe/bsw@0 551 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 552 lua_setfield(L, 2, "_type");
jbe@436 553 // set "_class" attribute to default class:
jbe@436 554 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe@436 555 lua_setfield(L, 2, "_class");
jbe@23 556 // return created database result list:
jbe/bsw@0 557 return 1;
jbe/bsw@0 558 }
jbe/bsw@0 559
jbe@23 560 // method "create_object" of database handles:
jbe/bsw@0 561 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 562 // ensure that first argument is a database connection:
jbe/bsw@0 563 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@436 564 // create new table on stack position 2:
jbe@436 565 lua_settop(L, 1);
jbe@436 566 lua_newtable(L); // 2
jbe@397 567 // set meta-table for database result lists/objects:
jbe@406 568 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 569 // set "_connection" attribute to self:
jbe/bsw@0 570 lua_pushvalue(L, 1); // 3
jbe/bsw@0 571 lua_setfield(L, 2, "_connection");
jbe@23 572 // set "_type" attribute to string "object":
jbe/bsw@0 573 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 574 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@436 575 // set "_class" attribute to default class:
jbe@436 576 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe@436 577 lua_setfield(L, 2, "_class");
jbe@23 578 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 579 lua_newtable(L); // 3
jbe/bsw@0 580 lua_setfield(L, 2, "_data");
jbe/bsw@0 581 lua_newtable(L); // 3
jbe/bsw@0 582 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 583 lua_newtable(L); // 3
jbe/bsw@0 584 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@417 585 // create column proxy (field "_col" in result object):
jbe@416 586 lua_newtable(L); // 3
jbe@416 587 luaL_setmetatable(L, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 588 lua_pushvalue(L, 2); // 4
jbe@416 589 lua_rawsetp(L, 3, MONDELEFANT_COLUMNS_RESULT_LUKEY);
jbe@417 590 lua_setfield(L, 2, "_col");
jbe@416 591 // return created database result object (from stack position 2):
jbe/bsw@0 592 return 1;
jbe/bsw@0 593 }
jbe/bsw@0 594
jbe@23 595 // method "quote_string" of database handles:
jbe/bsw@0 596 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 597 mondelefant_conn_t *conn;
jbe/bsw@0 598 const char *input;
jbe/bsw@0 599 size_t input_len;
jbe@407 600 luaL_Buffer buf;
jbe/bsw@0 601 char *output;
jbe/bsw@0 602 size_t output_len;
jbe@407 603 // get database connection object:
jbe/bsw@0 604 conn = mondelefant_get_conn(L, 1);
jbe@23 605 // get second argument, which must be a string:
jbe/bsw@0 606 input = luaL_checklstring(L, 2, &input_len);
jbe@23 607 // throw error, if string is too long:
jbe/bsw@0 608 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 609 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 610 }
jbe@23 611 // allocate memory for quoted string:
jbe@407 612 output = luaL_buffinitsize(L, &buf, (2 * input_len + 3) * sizeof(char));
jbe@23 613 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 614 // single quotes:
jbe/bsw@0 615 output[0] = '\'';
jbe/bsw@0 616 output_len = PQescapeStringConn(
jbe/bsw@0 617 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 618 );
jbe/bsw@0 619 output[output_len + 1] = '\'';
jbe/bsw@0 620 output[output_len + 2] = 0;
jbe@23 621 // create Lua string:
jbe@407 622 luaL_addsize(&buf, output_len + 2);
jbe@424 623 luaL_pushresult(&buf);
jbe@23 624 // return Lua string:
jbe/bsw@0 625 return 1;
jbe/bsw@0 626 }
jbe/bsw@0 627
jbe@23 628 // method "quote_binary" of database handles:
jbe/bsw@0 629 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 630 mondelefant_conn_t *conn;
jbe/bsw@0 631 const char *input;
jbe/bsw@0 632 size_t input_len;
jbe/bsw@0 633 char *output;
jbe/bsw@0 634 size_t output_len;
jbe/bsw@0 635 luaL_Buffer buf;
jbe@407 636 // get database connection object:
jbe/bsw@0 637 conn = mondelefant_get_conn(L, 1);
jbe@23 638 // get second argument, which must be a string:
jbe/bsw@0 639 input = luaL_checklstring(L, 2, &input_len);
jbe@408 640 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 641 if (conn->todo_PQfreemem) {
jbe@410 642 PQfreemem(conn->todo_PQfreemem);
jbe@410 643 conn->todo_PQfreemem = NULL;
jbe@410 644 }
jbe@23 645 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 646 output = (char *)PQescapeByteaConn(
jbe/bsw@0 647 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 648 );
jbe/bsw@0 649 if (!output) {
jbe@408 650 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@408 651 output = (char *)PQescapeByteaConn(
jbe@408 652 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe@408 653 );
jbe@408 654 if (!output) {
jbe@408 655 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe@408 656 }
jbe/bsw@0 657 }
jbe@412 658 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@408 659 conn->todo_PQfreemem = output;
jbe@23 660 // create Lua string enclosed by single quotes:
jbe/bsw@0 661 luaL_buffinit(L, &buf);
jbe/bsw@0 662 luaL_addchar(&buf, '\'');
jbe/bsw@0 663 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 664 luaL_addchar(&buf, '\'');
jbe/bsw@0 665 luaL_pushresult(&buf);
jbe@23 666 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 667 PQfreemem(output);
jbe@408 668 // avoid double call of PQfreemem later:
jbe@408 669 conn->todo_PQfreemem = NULL;
jbe@23 670 // return Lua string:
jbe/bsw@0 671 return 1;
jbe/bsw@0 672 }
jbe/bsw@0 673
jbe@23 674 // method "assemble_command" of database handles:
jbe/bsw@0 675 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 676 mondelefant_conn_t *conn;
jbe/bsw@0 677 int paramidx = 2;
jbe/bsw@0 678 const char *template;
jbe/bsw@0 679 size_t template_pos = 0;
jbe/bsw@0 680 luaL_Buffer buf;
jbe@407 681 // get database connection object:
jbe/bsw@0 682 conn = mondelefant_get_conn(L, 1);
jbe@23 683 // if second argument is a string, return this string:
jbe@397 684 if (lua_type(L, 2) == LUA_TSTRING) {
jbe@397 685 lua_settop(L, 2);
jbe/bsw@0 686 return 1;
jbe/bsw@0 687 }
jbe@23 688 // if second argument has __tostring meta-method,
jbe@23 689 // then use this method and return its result:
jbe/bsw@0 690 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 691 // otherwise, require that second argument is a table:
jbe/bsw@0 692 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 693 // set stack top:
jbe@397 694 lua_settop(L, 2);
jbe@23 695 // get first element of table, which must be a string:
jbe/bsw@0 696 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 697 luaL_argcheck(L,
jbe/bsw@0 698 lua_isstring(L, 3),
jbe/bsw@0 699 2,
jbe/bsw@0 700 "First entry of SQL command structure is not a string."
jbe/bsw@0 701 );
jbe/bsw@0 702 template = lua_tostring(L, 3);
jbe@23 703 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 704 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 705 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 706 // reserve space on Lua stack:
jbe/bsw@0 707 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 708 lua_pushnil(L); // free space at stack position 6
jbe@23 709 // initialize Lua buffer for result string:
jbe/bsw@0 710 luaL_buffinit(L, &buf);
jbe@23 711 // fill buffer in loop:
jbe/bsw@0 712 while (1) {
jbe@23 713 // variable declaration:
jbe/bsw@0 714 char c;
jbe@23 715 // get next character:
jbe/bsw@0 716 c = template[template_pos++];
jbe@23 717 // break, when character is NULL byte:
jbe/bsw@0 718 if (!c) break;
jbe@23 719 // question-mark and dollar-sign are special characters:
jbe@23 720 if (c == '?' || c == '$') { // special character found
jbe@23 721 // check, if same character follows:
jbe@23 722 if (template[template_pos] == c) { // special character is escaped
jbe@23 723 // consume two characters of input and add one character to buffer:
jbe/bsw@0 724 template_pos++;
jbe/bsw@0 725 luaL_addchar(&buf, c);
jbe@23 726 } else { // special character is not escaped
jbe/bsw@0 727 luaL_Buffer keybuf;
jbe/bsw@0 728 int subcmd;
jbe@23 729 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 730 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 731 subcmd = (c == '$');
jbe@23 732 // read any number of alpha numeric chars or underscores
jbe@23 733 // and store them on Lua stack:
jbe/bsw@0 734 luaL_buffinit(L, &keybuf);
jbe/bsw@0 735 while (1) {
jbe/bsw@0 736 c = template[template_pos];
jbe/bsw@0 737 if (
jbe/bsw@0 738 (c < 'A' || c > 'Z') &&
jbe/bsw@0 739 (c < 'a' || c > 'z') &&
jbe/bsw@0 740 (c < '0' || c > '9') &&
jbe/bsw@0 741 (c != '_')
jbe/bsw@0 742 ) break;
jbe/bsw@0 743 luaL_addchar(&keybuf, c);
jbe/bsw@0 744 template_pos++;
jbe/bsw@0 745 }
jbe/bsw@0 746 luaL_pushresult(&keybuf);
jbe@23 747 // check, if any characters matched:
jbe@64 748 if (lua_rawlen(L, -1)) {
jbe@23 749 // if any alpha numeric chars or underscores were found,
jbe@23 750 // push them on stack as a Lua string and use them to lookup
jbe@23 751 // value from second argument:
jbe/bsw@0 752 lua_pushvalue(L, -1); // save key on stack
jbe@23 753 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 754 } else {
jbe@23 755 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 756 lua_pop(L, 1);
jbe/bsw@0 757 lua_pushnil(L); // put nil on key position
jbe@23 758 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 759 }
jbe@23 760 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 761 // branch according to type of special character ("?" or "$"):
jbe@23 762 if (subcmd) { // dollar-sign
jbe/bsw@0 763 size_t i;
jbe/bsw@0 764 size_t count;
jbe@23 765 // store fetched value (which is supposed to be sub-structure)
jbe@23 766 // on Lua stack position 5 and drop key:
jbe@23 767 lua_replace(L, 5);
jbe@23 768 lua_pop(L, 1);
jbe@23 769 // Lua stack contains: ..., <buffer>
jbe@23 770 // check, if fetched value is really a sub-structure:
jbe/bsw@0 771 luaL_argcheck(L,
jbe/bsw@0 772 !lua_isnil(L, 5),
jbe/bsw@0 773 2,
jbe/bsw@0 774 "SQL sub-structure not found."
jbe/bsw@0 775 );
jbe/bsw@0 776 luaL_argcheck(L,
jbe/bsw@0 777 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 778 2,
jbe/bsw@0 779 "SQL sub-structure must be a table."
jbe/bsw@0 780 );
jbe@23 781 // Lua stack contains: ..., <buffer>
jbe@23 782 // get value of "sep" attribute of sub-structure,
jbe@23 783 // and place it on Lua stack position 6:
jbe/bsw@0 784 lua_getfield(L, 5, "sep");
jbe@23 785 lua_replace(L, 6);
jbe@23 786 // if seperator is nil, then use ", " as default,
jbe@23 787 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 788 if (lua_isnil(L, 6)) {
jbe/bsw@0 789 lua_pushstring(L, ", ");
jbe/bsw@0 790 lua_replace(L, 6);
jbe/bsw@0 791 } else {
jbe/bsw@0 792 luaL_argcheck(L,
jbe/bsw@0 793 lua_isstring(L, 6),
jbe/bsw@0 794 2,
jbe/bsw@0 795 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 796 );
jbe/bsw@0 797 }
jbe@23 798 // iterate over items of sub-structure:
jbe@64 799 count = lua_rawlen(L, 5);
jbe/bsw@0 800 for (i = 0; i < count; i++) {
jbe@23 801 // add seperator, unless this is the first run:
jbe/bsw@0 802 if (i) {
jbe/bsw@0 803 lua_pushvalue(L, 6);
jbe/bsw@0 804 luaL_addvalue(&buf);
jbe/bsw@0 805 }
jbe@23 806 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 807 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 808 lua_pushvalue(L, 1);
jbe/bsw@0 809 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 810 lua_call(L, 2, 1);
jbe/bsw@0 811 luaL_addvalue(&buf);
jbe/bsw@0 812 }
jbe@23 813 } else { // question-mark
jbe/bsw@0 814 if (lua_toboolean(L, 4)) {
jbe@23 815 // call input_converter with connection handle, raw-value and
jbe@23 816 // an info-table which contains a "field_name" entry with the
jbe@23 817 // used key:
jbe/bsw@0 818 lua_pushvalue(L, 4);
jbe/bsw@0 819 lua_pushvalue(L, 1);
jbe/bsw@0 820 lua_pushvalue(L, -3);
jbe/bsw@0 821 lua_newtable(L);
jbe/bsw@0 822 lua_pushvalue(L, -6);
jbe/bsw@0 823 lua_setfield(L, -2, "field_name");
jbe/bsw@0 824 lua_call(L, 3, 1);
jbe@23 825 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 826 // remove key and raw-value:
jbe/bsw@0 827 lua_remove(L, -2);
jbe/bsw@0 828 lua_remove(L, -2);
jbe@23 829 // Lua stack contains: ..., <buffer>, final-value
jbe@23 830 // throw error, if final-value is not a string:
jbe/bsw@0 831 if (!lua_isstring(L, -1)) {
jbe/bsw@0 832 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 833 }
jbe/bsw@0 834 } else {
jbe@23 835 // remove key from stack:
jbe/bsw@0 836 lua_remove(L, -2);
jbe@23 837 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 838 // branch according to type of value:
jbe@408 839 // NOTE: Lua automatically converts numbers to strings
jbe@23 840 if (lua_isnil(L, -1)) { // value is nil
jbe@23 841 // push string "NULL" to stack:
jbe/bsw@0 842 lua_pushliteral(L, "NULL");
jbe@23 843 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 844 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 845 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 846 } else if (lua_isstring(L, -1)) { // value is string or number
jbe@408 847 // push output of "quote_string" method of database connection
jbe@408 848 // to stack:
jbe/bsw@0 849 lua_tostring(L, -1);
jbe/bsw@0 850 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 851 lua_pushvalue(L, 1);
jbe/bsw@0 852 lua_pushvalue(L, -3);
jbe/bsw@0 853 lua_call(L, 2, 1);
jbe@23 854 } else { // value is of other type
jbe@23 855 // throw error:
jbe/bsw@0 856 return luaL_error(L,
jbe/bsw@0 857 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 858 "or missing input_converter."
jbe/bsw@0 859 );
jbe/bsw@0 860 }
jbe@23 861 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 862 // remove raw-value:
jbe/bsw@0 863 lua_remove(L, -2);
jbe@23 864 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 865 }
jbe@23 866 // append final-value to buffer:
jbe/bsw@0 867 luaL_addvalue(&buf);
jbe/bsw@0 868 }
jbe/bsw@0 869 }
jbe@23 870 } else { // character is not special
jbe@23 871 // just copy character:
jbe/bsw@0 872 luaL_addchar(&buf, c);
jbe/bsw@0 873 }
jbe/bsw@0 874 }
jbe@23 875 // return string in buffer:
jbe/bsw@0 876 luaL_pushresult(&buf);
jbe/bsw@0 877 return 1;
jbe/bsw@0 878 }
jbe/bsw@0 879
jbe@23 880 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 881 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 882 // max number of columns in a database result:
jbe/bsw@0 883 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 884 // enum values for 'modes' array in C-function below:
jbe/bsw@0 885 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 886 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 887 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 888
jbe@23 889 // method "try_query" of database handles:
jbe/bsw@0 890 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 891 mondelefant_conn_t *conn;
jbe/bsw@0 892 int command_count;
jbe/bsw@0 893 int command_idx;
jbe/bsw@0 894 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 895 luaL_Buffer buf;
jbe/bsw@0 896 int sent_success;
jbe/bsw@0 897 PGresult *res;
jbe/bsw@0 898 int rows, cols, row, col;
jbe@407 899 // get database connection object:
jbe/bsw@0 900 conn = mondelefant_get_conn(L, 1);
jbe@23 901 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 902 command_count = lua_gettop(L) / 2;
jbe@23 903 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 904 lua_pushnil(L);
jbe@23 905 // throw error, if number of commands is too high:
jbe/bsw@0 906 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 907 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 908 }
jbe@23 909 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 910 luaL_buffinit(L, &buf);
jbe/bsw@0 911 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 912 int mode;
jbe/bsw@0 913 int mode_idx; // stack index of mode string
jbe/bsw@0 914 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 915 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 916 lua_pushvalue(L, 1);
jbe/bsw@0 917 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 918 lua_call(L, 2, 1);
jbe/bsw@0 919 luaL_addvalue(&buf);
jbe/bsw@0 920 luaL_addchar(&buf, ';');
jbe/bsw@0 921 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 922 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 923 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 924 } else {
jbe/bsw@0 925 const char *modestr;
jbe/bsw@0 926 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 927 if (!strcmp(modestr, "list")) {
jbe/bsw@0 928 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 929 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 930 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 931 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 932 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 933 } else {
jbe@397 934 return luaL_argerror(L, mode_idx, "unknown query mode");
jbe/bsw@0 935 }
jbe/bsw@0 936 }
jbe/bsw@0 937 modes[command_idx] = mode;
jbe/bsw@0 938 }
jbe/bsw@0 939 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 940 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 941 // call sql_tracer, if set:
jbe/bsw@0 942 lua_settop(L, 2);
jbe/bsw@0 943 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 944 if (lua_toboolean(L, 3)) {
jbe/bsw@0 945 lua_pushvalue(L, 1); // 4
jbe/bsw@0 946 lua_pushvalue(L, 2); // 5
jbe/bsw@0 947 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 948 }
jbe@23 949 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 950 // position 3.
jbe@23 951 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 952 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 953 // create preliminary result table:
jbe/bsw@0 954 lua_newtable(L); // results in table at stack position 4
jbe@23 955 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 956 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 957 int mode;
jbe/bsw@0 958 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 959 ExecStatusType pgstatus;
jbe@23 960 // fetch mode which was given for the command:
jbe/bsw@0 961 mode = modes[command_idx];
jbe@23 962 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 963 if (sent_success) {
jbe@408 964 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 965 if (conn->todo_PQclear) {
jbe@410 966 PQclear(conn->todo_PQclear);
jbe@410 967 conn->todo_PQclear = NULL;
jbe@410 968 }
jbe@23 969 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 970 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 971 res = PQgetResult(conn->pgconn);
jbe/bsw@0 972 if (command_idx >= command_count && !res) break;
jbe/bsw@0 973 if (res) {
jbe/bsw@0 974 pgstatus = PQresultStatus(res);
jbe/bsw@0 975 rows = PQntuples(res);
jbe/bsw@0 976 cols = PQnfields(res);
jbe@412 977 // ensure call of PQclear in case of Lua errors:
jbe@408 978 conn->todo_PQclear = res;
jbe/bsw@0 979 }
jbe/bsw@0 980 }
jbe@23 981 // handle errors:
jbe/bsw@0 982 if (
jbe/bsw@0 983 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 984 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 985 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 986 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 987 ) {
jbe/bsw@0 988 const char *command;
jbe/bsw@0 989 command = lua_tostring(L, 2);
jbe/bsw@0 990 lua_newtable(L); // 5
jbe@406 991 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 992 lua_pushvalue(L, 1);
jbe/bsw@0 993 lua_setfield(L, 5, "connection");
jbe/bsw@0 994 lua_pushvalue(L, 2);
jbe/bsw@0 995 lua_setfield(L, 5, "sql_command");
jbe@397 996 if (!sent_success) {
jbe@397 997 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 998 lua_setfield(L, 5, "code");
jbe@397 999 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe/bsw@0 1000 lua_setfield(L, 5, "message");
jbe/bsw@0 1001 } else {
jbe@397 1002 lua_pushinteger(L, command_idx + 1);
jbe@397 1003 lua_setfield(L, 5, "command_number");
jbe@397 1004 if (!res) {
jbe@397 1005 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe@397 1006 lua_setfield(L, 5, "code");
jbe@397 1007 lua_pushliteral(L, "Received too few database result sets.");
jbe@397 1008 lua_setfield(L, 5, "message");
jbe@397 1009 } else if (command_idx >= command_count) {
jbe@397 1010 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe@397 1011 lua_setfield(L, 5, "code");
jbe@397 1012 lua_pushliteral(L, "Received too many database result sets.");
jbe@397 1013 lua_setfield(L, 5, "message");
jbe@397 1014 } else if (
jbe@397 1015 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe@397 1016 ) {
jbe@397 1017 const char *sqlstate;
jbe@397 1018 const char *errmsg;
jbe@397 1019 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe@397 1020 lua_setfield(L, 5, "pg_severity");
jbe@397 1021 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe@397 1022 if (sqlstate) {
jbe@397 1023 lua_pushstring(L, sqlstate);
jbe@397 1024 lua_setfield(L, 5, "pg_sqlstate");
jbe@397 1025 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe@397 1026 lua_setfield(L, 5, "code");
jbe@397 1027 } else {
jbe@397 1028 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe@397 1029 lua_setfield(L, 5, "code");
jbe@397 1030 }
jbe@397 1031 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe@397 1032 if (errmsg) {
jbe@397 1033 mondelefant_push_first_line(L, errmsg);
jbe@397 1034 lua_setfield(L, 5, "message");
jbe@397 1035 lua_pushstring(L, errmsg);
jbe@397 1036 lua_setfield(L, 5, "pg_message_primary");
jbe@397 1037 } else {
jbe@397 1038 lua_pushliteral(L,
jbe@397 1039 "Error while fetching result, but no error message given."
jbe@397 1040 );
jbe@397 1041 lua_setfield(L, 5, "message");
jbe@397 1042 }
jbe@397 1043 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe@397 1044 lua_setfield(L, 5, "pg_message_detail");
jbe@397 1045 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe@397 1046 lua_setfield(L, 5, "pg_message_hint");
jbe@397 1047 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe@397 1048 // byte offsets, as Lua 5.2 is not Unicode aware.
jbe@397 1049 {
jbe@397 1050 char *tmp;
jbe@397 1051 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe@397 1052 if (tmp) {
jbe@397 1053 int pos;
jbe@397 1054 pos = atoi(tmp) - 1;
jbe@397 1055 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1056 pos = utf8_position_to_byte(command, pos);
jbe@397 1057 }
jbe@397 1058 lua_pushinteger(L, pos + 1);
jbe@397 1059 lua_setfield(L, 5, "position");
jbe@397 1060 }
jbe@397 1061 }
jbe@397 1062 {
jbe@397 1063 const char *internal_query;
jbe@397 1064 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe@397 1065 lua_pushstring(L, internal_query);
jbe@397 1066 lua_setfield(L, 5, "pg_internal_query");
jbe@397 1067 char *tmp;
jbe@397 1068 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe@397 1069 if (tmp) {
jbe@397 1070 int pos;
jbe@397 1071 pos = atoi(tmp) - 1;
jbe@397 1072 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1073 pos = utf8_position_to_byte(internal_query, pos);
jbe@397 1074 }
jbe@397 1075 lua_pushinteger(L, pos + 1);
jbe@397 1076 lua_setfield(L, 5, "pg_internal_position");
jbe@397 1077 }
jbe@397 1078 }
jbe@397 1079 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe@397 1080 lua_setfield(L, 5, "pg_context");
jbe@397 1081 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe@397 1082 lua_setfield(L, 5, "pg_source_file");
jbe@397 1083 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe@397 1084 lua_setfield(L, 5, "pg_source_line");
jbe@397 1085 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe@397 1086 lua_setfield(L, 5, "pg_source_function");
jbe@397 1087 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe@397 1088 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe@397 1089 lua_setfield(L, 5, "code");
jbe@397 1090 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe@397 1091 lua_setfield(L, 5, "message");
jbe@397 1092 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe@397 1093 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe@397 1094 lua_setfield(L, 5, "code");
jbe@397 1095 lua_pushliteral(L, "Got more than one result row.");
jbe@397 1096 lua_setfield(L, 5, "message");
jbe@397 1097 } else {
jbe@397 1098 // should not happen
jbe@397 1099 abort();
jbe@397 1100 }
jbe@397 1101 if (res) {
jbe@397 1102 PQclear(res);
jbe@397 1103 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe@408 1104 // avoid double call of PQclear later:
jbe@408 1105 conn->todo_PQclear = NULL;
jbe@397 1106 }
jbe/bsw@0 1107 }
jbe/bsw@0 1108 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1109 lua_pushvalue(L, 3);
jbe/bsw@0 1110 lua_pushvalue(L, 5);
jbe/bsw@0 1111 lua_call(L, 1, 0);
jbe/bsw@0 1112 }
jbe/bsw@0 1113 return 1;
jbe/bsw@0 1114 }
jbe@23 1115 // call "create_list" or "create_object" method of database handle,
jbe@23 1116 // result will be at stack position 5:
jbe/bsw@0 1117 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1118 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1119 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1120 lua_call(L, 1, 1); // 5
jbe/bsw@0 1121 } else {
jbe/bsw@0 1122 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1123 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1124 lua_call(L, 1, 1); // 5
jbe/bsw@0 1125 }
jbe@23 1126 // set "_column_info":
jbe@23 1127 lua_newtable(L); // 6
jbe/bsw@0 1128 for (col = 0; col < cols; col++) {
jbe/bsw@0 1129 lua_newtable(L); // 7
jbe@380 1130 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1131 lua_pushvalue(L, 8); // 9
jbe@380 1132 lua_pushvalue(L, 7); // 10
jbe@380 1133 lua_rawset(L, 6);
jbe/bsw@0 1134 lua_setfield(L, 7, "field_name");
jbe@380 1135 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1136 {
jbe/bsw@0 1137 Oid tmp;
jbe/bsw@0 1138 tmp = PQftable(res, col);
jbe/bsw@0 1139 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1140 else lua_pushinteger(L, tmp);
jbe/bsw@0 1141 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1142 }
jbe/bsw@0 1143 {
jbe/bsw@0 1144 int tmp;
jbe/bsw@0 1145 tmp = PQftablecol(res, col);
jbe/bsw@0 1146 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1147 else lua_pushinteger(L, tmp);
jbe/bsw@0 1148 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1149 }
jbe/bsw@0 1150 {
jbe/bsw@0 1151 Oid tmp;
jbe/bsw@0 1152 tmp = PQftype(res, col);
jbe/bsw@0 1153 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1154 lua_pushinteger(L, tmp);
jbe/bsw@0 1155 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1156 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1157 lua_setfield(L, 7, "type");
jbe/bsw@0 1158 }
jbe/bsw@0 1159 {
jbe/bsw@0 1160 int tmp;
jbe/bsw@0 1161 tmp = PQfmod(res, col);
jbe/bsw@0 1162 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1163 else lua_pushinteger(L, tmp);
jbe/bsw@0 1164 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1165 }
jbe/bsw@0 1166 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1167 }
jbe@23 1168 lua_setfield(L, 5, "_column_info");
jbe@23 1169 // set "_rows_affected":
jbe/bsw@0 1170 {
jbe/bsw@0 1171 char *tmp;
jbe/bsw@0 1172 tmp = PQcmdTuples(res);
jbe/bsw@0 1173 if (tmp[0]) {
jbe/bsw@0 1174 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1175 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1176 }
jbe/bsw@0 1177 }
jbe@23 1178 // set "_oid":
jbe/bsw@0 1179 {
jbe/bsw@0 1180 Oid tmp;
jbe/bsw@0 1181 tmp = PQoidValue(res);
jbe/bsw@0 1182 if (tmp != InvalidOid) {
jbe/bsw@0 1183 lua_pushinteger(L, tmp);
jbe/bsw@0 1184 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1185 }
jbe/bsw@0 1186 }
jbe@23 1187 // copy data as strings or nil, while performing binary unescaping
jbe@23 1188 // automatically:
jbe/bsw@0 1189 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1190 for (row = 0; row < rows; row++) {
jbe/bsw@0 1191 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1192 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1193 lua_call(L, 1, 1); // 6
jbe/bsw@0 1194 for (col = 0; col < cols; col++) {
jbe/bsw@0 1195 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1196 lua_pushnil(L);
jbe/bsw@0 1197 } else if (binary[col]) {
jbe/bsw@0 1198 size_t binlen;
jbe/bsw@0 1199 char *binval;
jbe@412 1200 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1201 if (conn->todo_PQfreemem) {
jbe@412 1202 PQfreemem(conn->todo_PQfreemem);
jbe@412 1203 conn->todo_PQfreemem = NULL;
jbe@412 1204 }
jbe@412 1205 // Unescape binary data:
jbe/bsw@0 1206 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1207 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1208 );
jbe/bsw@0 1209 if (!binval) {
jbe/bsw@0 1210 return luaL_error(L,
jbe/bsw@0 1211 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1212 );
jbe/bsw@0 1213 }
jbe@412 1214 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1215 conn->todo_PQfreemem = binval;
jbe@412 1216 // create Lua string:
jbe/bsw@0 1217 lua_pushlstring(L, binval, binlen);
jbe@412 1218 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1219 PQfreemem(binval);
jbe@412 1220 // avoid double call of PQfreemem later:
jbe@412 1221 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1222 } else {
jbe/bsw@0 1223 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1224 }
jbe/bsw@0 1225 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1226 }
jbe/bsw@0 1227 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1228 }
jbe/bsw@0 1229 } else if (rows == 1) {
jbe/bsw@0 1230 for (col = 0; col < cols; col++) {
jbe/bsw@0 1231 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1232 lua_pushnil(L);
jbe/bsw@0 1233 } else if (binary[col]) {
jbe/bsw@0 1234 size_t binlen;
jbe/bsw@0 1235 char *binval;
jbe@412 1236 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1237 if (conn->todo_PQfreemem) {
jbe@412 1238 PQfreemem(conn->todo_PQfreemem);
jbe@412 1239 conn->todo_PQfreemem = NULL;
jbe@412 1240 }
jbe@412 1241 // Unescape binary data:
jbe/bsw@0 1242 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1243 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1244 );
jbe/bsw@0 1245 if (!binval) {
jbe/bsw@0 1246 return luaL_error(L,
jbe/bsw@0 1247 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1248 );
jbe/bsw@0 1249 }
jbe@412 1250 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1251 conn->todo_PQfreemem = binval;
jbe@412 1252 // create Lua string:
jbe/bsw@0 1253 lua_pushlstring(L, binval, binlen);
jbe@412 1254 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1255 PQfreemem(binval);
jbe@412 1256 // avoid double call of PQfreemem later:
jbe@412 1257 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1258 } else {
jbe/bsw@0 1259 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1260 }
jbe/bsw@0 1261 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1262 }
jbe/bsw@0 1263 } else {
jbe/bsw@0 1264 // no row in optrow mode
jbe/bsw@0 1265 lua_pop(L, 1);
jbe/bsw@0 1266 lua_pushnil(L);
jbe/bsw@0 1267 }
jbe@23 1268 // save result in result list:
jbe/bsw@0 1269 lua_rawseti(L, 4, command_idx+1);
jbe@23 1270 // extra assertion:
jbe/bsw@0 1271 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1272 // free memory acquired by libpq:
jbe/bsw@0 1273 PQclear(res);
jbe@408 1274 // avoid double call of PQclear later:
jbe@408 1275 conn->todo_PQclear = NULL;
jbe/bsw@0 1276 }
jbe/bsw@0 1277 // trace callback at stack position 3
jbe/bsw@0 1278 // result at stack position 4 (top of stack)
jbe@23 1279 // if a trace callback is existent, then call:
jbe/bsw@0 1280 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1281 lua_pushvalue(L, 3);
jbe/bsw@0 1282 lua_call(L, 0, 0);
jbe/bsw@0 1283 }
jbe@23 1284 // put result at stack position 3:
jbe@23 1285 lua_replace(L, 3);
jbe@23 1286 // get output converter to stack position 4:
jbe@23 1287 lua_getfield(L, 1, "output_converter");
jbe@374 1288 // get mutability state saver to stack position 5:
jbe@375 1289 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1290 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1291 lua_replace(L, -2);
jbe@23 1292 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1293 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1294 int mode;
jbe/bsw@0 1295 mode = modes[command_idx];
jbe@374 1296 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1297 if (lua_toboolean(L, 6)) {
jbe@374 1298 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@374 1299 cols = lua_rawlen(L, 7);
jbe/bsw@0 1300 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@374 1301 rows = lua_rawlen(L, 6);
jbe/bsw@0 1302 for (row = 0; row < rows; row++) {
jbe@374 1303 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1304 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1305 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1306 for (col = 0; col < cols; col++) {
jbe@375 1307 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1308 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1309 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1310 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1311 lua_pushvalue(L, 1); // connection
jbe@374 1312 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1313 lua_pushvalue(L, 11); // this column info
jbe@375 1314 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1315 } else {
jbe@375 1316 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1317 }
jbe@375 1318 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1319 lua_pushvalue(L, 12); // copy of field name
jbe@375 1320 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1321 lua_pushvalue(L, 13); // copy of value
jbe@375 1322 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1323 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1324 }
jbe@375 1325 lua_pushvalue(L, 13); // 14
jbe@374 1326 lua_rawseti(L, 8, col+1);
jbe@374 1327 lua_rawset(L, 9);
jbe@399 1328 lua_settop(L, 10);
jbe/bsw@0 1329 }
jbe@374 1330 lua_settop(L, 7);
jbe/bsw@0 1331 }
jbe/bsw@0 1332 } else {
jbe@374 1333 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1334 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1335 for (col = 0; col < cols; col++) {
jbe@375 1336 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1337 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1338 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1339 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1340 lua_pushvalue(L, 1); // connection
jbe@374 1341 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1342 lua_pushvalue(L, 10); // this column info
jbe@375 1343 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1344 } else {
jbe@375 1345 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1346 }
jbe@375 1347 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1348 lua_pushvalue(L, 11); // copy of field name
jbe@375 1349 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1350 lua_pushvalue(L, 12); // copy of value
jbe@375 1351 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1352 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1353 }
jbe@375 1354 lua_pushvalue(L, 12); // 13
jbe@374 1355 lua_rawseti(L, 6, col+1);
jbe@374 1356 lua_rawset(L, 8);
jbe@399 1357 lua_settop(L, 9);
jbe/bsw@0 1358 }
jbe/bsw@0 1359 }
jbe/bsw@0 1360 }
jbe@374 1361 lua_settop(L, 5);
jbe/bsw@0 1362 }
jbe@23 1363 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1364 lua_settop(L, 3);
jbe/bsw@0 1365 lua_pushnil(L);
jbe/bsw@0 1366 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1367 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1368 }
jbe/bsw@0 1369 return command_count+1;
jbe/bsw@0 1370 }
jbe/bsw@0 1371
jbe@472 1372 // meta-method "__tostring" of error objects:
jbe@472 1373 static int mondelefant_errorobject_tostring(lua_State *L) {
jbe@472 1374 const char *errclass;
jbe@472 1375 const char *errmsg;
jbe@472 1376 luaL_checktype(L, 1, LUA_TTABLE);
jbe@472 1377 lua_settop(L, 1);
jbe@472 1378 lua_getfield(L, 1, "code"); // 2
jbe@472 1379 lua_getfield(L, 1, "message"); // 3
jbe@472 1380 errclass = lua_tostring(L, 2);
jbe@472 1381 errmsg = lua_tostring(L, 3);
jbe@472 1382 if (!errclass) errclass = "(null)";
jbe@472 1383 if (!errmsg) errclass = "(null)";
jbe@472 1384 lua_pushfstring(L, "database error of class \"%s\": %s", errclass, errmsg);
jbe@472 1385 return 1;
jbe@472 1386 }
jbe@472 1387
jbe@397 1388 // method "is_kind_of" of error objects:
jbe@397 1389 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe@397 1390 const char *errclass;
jbe@397 1391 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1392 errclass = luaL_checkstring(L, 2);
jbe@397 1393 lua_settop(L, 2);
jbe@397 1394 lua_getfield(L, 1, "code"); // 3
jbe@397 1395 luaL_argcheck(L,
jbe@397 1396 lua_type(L, 3) == LUA_TSTRING,
jbe@397 1397 1,
jbe@397 1398 "field 'code' of error object is not a string"
jbe@397 1399 );
jbe@397 1400 lua_pushboolean(L,
jbe@397 1401 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
jbe@397 1402 );
jbe@397 1403 return 1;
jbe@397 1404 }
jbe@397 1405
jbe@397 1406 // method "wait" of database handles:
jbe@397 1407 static int mondelefant_conn_wait(lua_State *L) {
jbe@397 1408 int argc;
jbe@397 1409 // count number of arguments:
jbe@397 1410 argc = lua_gettop(L);
jbe@397 1411 // insert "try_wait" function/method at stack position 1:
jbe@397 1412 lua_pushcfunction(L, mondelefant_conn_try_wait);
jbe@397 1413 lua_insert(L, 1);
jbe@397 1414 // call "try_wait" method:
jbe@397 1415 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@397 1416 // check, if error occurred:
jbe@397 1417 if (lua_toboolean(L, 1)) {
jbe@397 1418 // raise error
jbe/bsw@0 1419 lua_settop(L, 1);
jbe/bsw@0 1420 return lua_error(L);
jbe/bsw@0 1421 } else {
jbe@397 1422 // return everything but nil error object:
jbe@397 1423 return lua_gettop(L) - 1;
jbe/bsw@0 1424 }
jbe/bsw@0 1425 }
jbe/bsw@0 1426
jbe@23 1427 // method "query" of database handles:
jbe/bsw@0 1428 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1429 int argc;
jbe@23 1430 // count number of arguments:
jbe/bsw@0 1431 argc = lua_gettop(L);
jbe@23 1432 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1433 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1434 lua_insert(L, 1);
jbe@23 1435 // call "try_query" method:
jbe@23 1436 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1437 // check, if error occurred:
jbe@23 1438 if (lua_toboolean(L, 1)) {
jbe@397 1439 // raise error
jbe@397 1440 lua_settop(L, 1);
jbe@397 1441 return lua_error(L);
jbe/bsw@0 1442 } else {
jbe@23 1443 // return everything but nil error object:
jbe@23 1444 return lua_gettop(L) - 1;
jbe/bsw@0 1445 }
jbe/bsw@0 1446 }
jbe/bsw@0 1447
jbe@23 1448 // library function "set_class":
jbe/bsw@0 1449 static int mondelefant_set_class(lua_State *L) {
jbe@23 1450 // ensure that first argument is a database result list/object:
jbe/bsw@0 1451 lua_settop(L, 2);
jbe/bsw@0 1452 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1453 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1454 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@23 1455 // ensure that second argument is a database class (model):
jbe/bsw@0 1456 lua_settop(L, 2);
jbe/bsw@0 1457 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1458 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1459 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@23 1460 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1461 lua_settop(L, 2);
jbe/bsw@0 1462 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1463 lua_setfield(L, 1, "_class");
jbe@23 1464 // test, if database result is a list (and not a single object):
jbe/bsw@0 1465 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1466 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1467 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1468 int i;
jbe@23 1469 // set attribute "_class" of all elements to given class:
jbe@64 1470 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe/bsw@0 1471 lua_settop(L, 2);
jbe/bsw@0 1472 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1473 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1474 lua_setfield(L, 3, "_class");
jbe/bsw@0 1475 }
jbe/bsw@0 1476 }
jbe@23 1477 // return first argument:
jbe/bsw@0 1478 lua_settop(L, 1);
jbe/bsw@0 1479 return 1;
jbe/bsw@0 1480 }
jbe/bsw@0 1481
jbe@23 1482 // library function "new_class":
jbe/bsw@0 1483 static int mondelefant_new_class(lua_State *L) {
jbe@397 1484 // if no argument is given, use an empty table:
jbe@397 1485 if (lua_isnoneornil(L, 1)) {
jbe/bsw@0 1486 lua_settop(L, 0);
jbe/bsw@0 1487 lua_newtable(L); // 1
jbe@397 1488 } else {
jbe@397 1489 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1490 lua_settop(L, 1);
jbe/bsw@0 1491 }
jbe@23 1492 // set meta-table for database classes (models):
jbe@406 1493 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
jbe@23 1494 // check, if "prototype" attribute is not set:
jbe/bsw@0 1495 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1496 lua_rawget(L, 1); // 2
jbe/bsw@0 1497 if (!lua_toboolean(L, 2)) {
jbe@23 1498 // set "prototype" attribute to default prototype:
jbe/bsw@0 1499 lua_pushliteral(L, "prototype"); // 3
jbe@413 1500 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1501 lua_rawset(L, 1);
jbe/bsw@0 1502 }
jbe@23 1503 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1504 lua_settop(L, 1);
jbe/bsw@0 1505 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1506 lua_rawget(L, 1); // 2
jbe/bsw@0 1507 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1508 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1509 lua_newtable(L); // 4
jbe/bsw@0 1510 lua_rawset(L, 1);
jbe/bsw@0 1511 }
jbe@23 1512 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1513 lua_settop(L, 1);
jbe/bsw@0 1514 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1515 lua_rawget(L, 1); // 2
jbe/bsw@0 1516 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1517 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1518 lua_newtable(L); // 4
jbe/bsw@0 1519 lua_rawset(L, 1);
jbe/bsw@0 1520 }
jbe@23 1521 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1522 lua_settop(L, 1);
jbe/bsw@0 1523 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1524 lua_rawget(L, 1); // 2
jbe/bsw@0 1525 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1526 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1527 lua_newtable(L); // 4
jbe/bsw@0 1528 lua_rawset(L, 1);
jbe/bsw@0 1529 }
jbe@23 1530 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1531 lua_settop(L, 1);
jbe/bsw@0 1532 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1533 lua_rawget(L, 1); // 2
jbe/bsw@0 1534 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1535 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1536 lua_newtable(L); // 4
jbe/bsw@0 1537 lua_rawset(L, 1);
jbe/bsw@0 1538 }
jbe@23 1539 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1540 lua_settop(L, 1);
jbe/bsw@0 1541 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1542 lua_rawget(L, 1); // 2
jbe/bsw@0 1543 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1544 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1545 lua_newtable(L); // 4
jbe/bsw@0 1546 lua_rawset(L, 1);
jbe/bsw@0 1547 }
jbe@23 1548 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1549 lua_settop(L, 1);
jbe/bsw@0 1550 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1551 lua_rawget(L, 1); // 2
jbe/bsw@0 1552 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1553 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1554 lua_newtable(L); // 4
jbe/bsw@0 1555 lua_rawset(L, 1);
jbe/bsw@0 1556 }
jbe@23 1557 // return table:
jbe/bsw@0 1558 lua_settop(L, 1);
jbe/bsw@0 1559 return 1;
jbe/bsw@0 1560 }
jbe/bsw@0 1561
jbe@23 1562 // method "get_reference" of classes (models):
jbe/bsw@0 1563 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1564 lua_settop(L, 2);
jbe/bsw@0 1565 while (lua_toboolean(L, 1)) {
jbe@23 1566 // get "references" table:
jbe/bsw@0 1567 lua_getfield(L, 1, "references"); // 3
jbe@23 1568 // perform lookup:
jbe/bsw@0 1569 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1570 lua_gettable(L, 3); // 4
jbe@23 1571 // return result, if lookup was successful:
jbe/bsw@0 1572 if (!lua_isnil(L, 4)) return 1;
jbe@23 1573 // replace current table by its prototype:
jbe/bsw@0 1574 lua_settop(L, 2);
jbe/bsw@0 1575 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1576 lua_rawget(L, 1); // 3
jbe/bsw@0 1577 lua_replace(L, 1);
jbe/bsw@0 1578 }
jbe@23 1579 // return nothing:
jbe/bsw@0 1580 return 0;
jbe/bsw@0 1581 }
jbe/bsw@0 1582
jbe@23 1583 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1584 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1585 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1586 }
jbe/bsw@0 1587
jbe@23 1588 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1589 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1590 lua_settop(L, 2);
jbe/bsw@0 1591 while (lua_toboolean(L, 1)) {
jbe@23 1592 // get "foreign_keys" table:
jbe/bsw@0 1593 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1594 // perform lookup:
jbe/bsw@0 1595 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1596 lua_gettable(L, 3); // 4
jbe@23 1597 // return result, if lookup was successful:
jbe/bsw@0 1598 if (!lua_isnil(L, 4)) return 1;
jbe@23 1599 // replace current table by its prototype:
jbe/bsw@0 1600 lua_settop(L, 2);
jbe/bsw@0 1601 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1602 lua_rawget(L, 1); // 3
jbe/bsw@0 1603 lua_replace(L, 1);
jbe/bsw@0 1604 }
jbe@23 1605 // return nothing:
jbe/bsw@0 1606 return 0;
jbe/bsw@0 1607 }
jbe/bsw@0 1608
jbe@23 1609 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1610 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1611 const char *result_type;
jbe@23 1612 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1613 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1614 return 0;
jbe/bsw@0 1615 }
jbe@436 1616 // class on stack position 3:
jbe@23 1617 lua_settop(L, 2);
jbe/bsw@0 1618 lua_getfield(L, 1, "_class"); // 3
jbe@23 1619 // get value of "_type" attribute:
jbe/bsw@0 1620 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1621 result_type = lua_tostring(L, 4);
jbe@23 1622 // different lookup for lists and objects:
jbe@23 1623 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1624 lua_settop(L, 3);
jbe@384 1625 // try inherited attributes, methods or getter functions:
jbe@383 1626 lua_pushvalue(L, 3); // 4
jbe@383 1627 while (lua_toboolean(L, 4)) {
jbe@383 1628 lua_getfield(L, 4, "object"); // 5
jbe@383 1629 lua_pushvalue(L, 2); // 6
jbe@383 1630 lua_gettable(L, 5); // 6
jbe@383 1631 if (!lua_isnil(L, 6)) return 1;
jbe@383 1632 lua_settop(L, 4);
jbe@383 1633 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1634 lua_pushvalue(L, 2); // 6
jbe@383 1635 lua_gettable(L, 5); // 6
jbe@383 1636 if (lua_toboolean(L, 6)) {
jbe@383 1637 lua_pushvalue(L, 1); // 7
jbe@383 1638 lua_call(L, 1, 1); // 6
jbe/bsw@0 1639 return 1;
jbe/bsw@0 1640 }
jbe@383 1641 lua_settop(L, 4);
jbe@383 1642 lua_pushliteral(L, "prototype"); // 5
jbe@383 1643 lua_rawget(L, 4); // 5
jbe@383 1644 lua_replace(L, 4);
jbe/bsw@0 1645 }
jbe@383 1646 lua_settop(L, 3);
jbe/bsw@0 1647 // try primary keys of referenced objects:
jbe/bsw@0 1648 lua_pushcfunction(L,
jbe/bsw@0 1649 mondelefant_class_get_foreign_key_reference_name
jbe@383 1650 ); // 4
jbe@383 1651 lua_pushvalue(L, 3); // 5
jbe@383 1652 lua_pushvalue(L, 2); // 6
jbe@383 1653 lua_call(L, 2, 1); // 4
jbe@383 1654 if (!lua_isnil(L, 4)) {
jbe@383 1655 // reference name at stack position 4
jbe@383 1656 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1657 lua_pushvalue(L, 3); // 6
jbe@383 1658 lua_pushvalue(L, 4); // 7
jbe@383 1659 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1660 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1661 lua_getfield(L, 5, "ref"); // 7
jbe@383 1662 lua_gettable(L, 6); // 7
jbe@383 1663 if (!lua_isnil(L, 7)) {
jbe@383 1664 if (lua_toboolean(L, 7)) {
jbe@383 1665 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1666 if (lua_isnil(L, 8)) {
jbe/bsw@0 1667 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1668 }
jbe@383 1669 lua_gettable(L, 7); // 8
jbe/bsw@0 1670 } else {
jbe/bsw@0 1671 lua_pushnil(L);
jbe/bsw@0 1672 }
jbe/bsw@0 1673 return 1;
jbe/bsw@0 1674 }
jbe/bsw@0 1675 }
jbe@383 1676 lua_settop(L, 3);
jbe@383 1677 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1678 // try cached referenced object (or cached NULL reference):
jbe@383 1679 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1680 lua_pushvalue(L, 2); // 6
jbe@383 1681 lua_gettable(L, 5); // 6
jbe@383 1682 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1683 lua_pushnil(L);
jbe/bsw@0 1684 return 1;
jbe@383 1685 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1686 return 1;
jbe/bsw@0 1687 }
jbe@383 1688 lua_settop(L, 4);
jbe/bsw@0 1689 // try to load a referenced object:
jbe@383 1690 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1691 lua_pushvalue(L, 3); // 6
jbe@383 1692 lua_pushvalue(L, 2); // 7
jbe@383 1693 lua_call(L, 2, 1); // 5
jbe@383 1694 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1695 lua_settop(L, 2);
jbe/bsw@0 1696 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1697 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1698 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1699 lua_call(L, 2, 0);
jbe/bsw@0 1700 lua_settop(L, 2);
jbe/bsw@0 1701 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1702 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1703 lua_gettable(L, 3); // 4
jbe/bsw@0 1704 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1705 return 1;
jbe/bsw@0 1706 }
jbe@383 1707 lua_settop(L, 4);
jbe@415 1708 // check if proxy access to document in special column is enabled:
jbe@383 1709 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1710 if (lua_toboolean(L, 5)) {
jbe@415 1711 // if yes, then proxy access:
jbe@383 1712 lua_gettable(L, 4); // 5
jbe@383 1713 if (!lua_isnil(L, 5)) {
jbe@383 1714 lua_pushvalue(L, 2); // 6
jbe@383 1715 lua_gettable(L, 5); // 6
jbe@383 1716 }
jbe@415 1717 } else {
jbe@415 1718 // else use _data table:
jbe@415 1719 lua_pushvalue(L, 2); // 6
jbe@415 1720 lua_gettable(L, 4); // 6
jbe@383 1721 }
jbe@415 1722 return 1; // return element at stack position 5 or 6
jbe@23 1723 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1724 lua_settop(L, 3);
jbe/bsw@0 1725 // try inherited list attributes or methods:
jbe/bsw@0 1726 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1727 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1728 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1729 lua_gettable(L, 4); // 5
jbe/bsw@0 1730 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1731 lua_settop(L, 3);
jbe/bsw@0 1732 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1733 lua_rawget(L, 3); // 4
jbe/bsw@0 1734 lua_replace(L, 3);
jbe/bsw@0 1735 }
jbe/bsw@0 1736 }
jbe@23 1737 // return nothing:
jbe/bsw@0 1738 return 0;
jbe/bsw@0 1739 }
jbe/bsw@0 1740
jbe@23 1741 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1742 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1743 const char *result_type;
jbe@23 1744 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1745 lua_settop(L, 3);
jbe/bsw@0 1746 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1747 lua_rawset(L, 1);
jbe/bsw@0 1748 return 1;
jbe/bsw@0 1749 }
jbe@436 1750 // class on stack position 4:
jbe@384 1751 lua_settop(L, 3);
jbe/bsw@0 1752 lua_getfield(L, 1, "_class"); // 4
jbe@23 1753 // get value of "_type" attribute:
jbe/bsw@0 1754 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1755 result_type = lua_tostring(L, 5);
jbe@378 1756 // distinguish between lists and objects:
jbe@378 1757 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1758 lua_settop(L, 4);
jbe@378 1759 // try object setter functions:
jbe@384 1760 lua_pushvalue(L, 4); // 5
jbe@384 1761 while (lua_toboolean(L, 5)) {
jbe@384 1762 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1763 lua_pushvalue(L, 2); // 7
jbe@384 1764 lua_gettable(L, 6); // 7
jbe@384 1765 if (lua_toboolean(L, 7)) {
jbe@384 1766 lua_pushvalue(L, 1); // 8
jbe@384 1767 lua_pushvalue(L, 3); // 9
jbe@378 1768 lua_call(L, 2, 0);
jbe@378 1769 return 0;
jbe@378 1770 }
jbe@384 1771 lua_settop(L, 5);
jbe@384 1772 lua_pushliteral(L, "prototype"); // 6
jbe@384 1773 lua_rawget(L, 5); // 6
jbe@384 1774 lua_replace(L, 5);
jbe@378 1775 }
jbe@384 1776 lua_settop(L, 4);
jbe@384 1777 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1778 // check, if a object reference is changed:
jbe@384 1779 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1780 lua_pushvalue(L, 4); // 7
jbe@384 1781 lua_pushvalue(L, 2); // 8
jbe@384 1782 lua_call(L, 2, 1); // 6
jbe@384 1783 if (!lua_isnil(L, 6)) {
jbe@544 1784 // special handling of 1:1 references (primary side):
jbe@544 1785 lua_getfield(L, 6, "mode"); // 7
jbe@546 1786 if (lua_isstring(L, 7) && !strcmp(lua_tostring(L, 7), "11")) {
jbe@544 1787 lua_getfield(L, 6, "primary"); // 8
jbe@544 1788 if (lua_toboolean(L, 8)) {
jbe@544 1789 if (!lua_isnil(L, 3)) {
jbe@544 1790 // set backward reference:
jbe@547 1791 lua_getfield(L, 6, "back_ref"); // 9
jbe@547 1792 if (lua_toboolean(L, 9)) {
jbe@547 1793 lua_pushvalue(L, 1); // 10
jbe@547 1794 lua_settable(L, 3);
jbe@547 1795 }
jbe@544 1796 }
jbe@544 1797 // do nothing else:
jbe@544 1798 return 0;
jbe@544 1799 }
jbe@544 1800 }
jbe@545 1801 lua_settop(L, 6);
jbe/bsw@0 1802 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1803 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1804 lua_pushvalue(L, 2); // 8
jbe@384 1805 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1806 else lua_pushvalue(L, 3); // 9
jbe@384 1807 lua_settable(L, 7);
jbe@384 1808 lua_settop(L, 6);
jbe@544 1809 // special handling of 1:1 references (secondary side):
jbe@544 1810 lua_getfield(L, 6, "mode"); // 7
jbe@546 1811 if (lua_isstring(L, 7) && !strcmp(lua_tostring(L, 7), "11")) {
jbe@544 1812 lua_settop(L, 6);
jbe@544 1813 if (!lua_isnil(L, 3)) {
jbe@544 1814 // store object in other _ref table (use false for nil): // TODO: use special object instead of false
jbe@544 1815 lua_getfield(L, 3, "_ref"); // 7
jbe@547 1816 lua_getfield(L, 6, "back_ref"); // 8
jbe@547 1817 if (lua_toboolean(L, 8)) {
jbe@547 1818 lua_pushvalue(L, 1); // 9
jbe@547 1819 lua_settable(L, 7);
jbe@547 1820 }
jbe@544 1821 }
jbe@544 1822 }
jbe@544 1823 lua_settop(L, 6);
jbe/bsw@0 1824 // delete referencing key from _data table:
jbe@384 1825 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1826 if (lua_isnil(L, 7)) {
jbe/bsw@0 1827 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1828 }
jbe@384 1829 lua_pushvalue(L, 7); // 8
jbe@384 1830 lua_pushnil(L); // 9
jbe@384 1831 lua_settable(L, 5);
jbe@384 1832 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1833 lua_pushvalue(L, 7); // 9
jbe@384 1834 lua_pushboolean(L, 1); // 10
jbe@384 1835 lua_settable(L, 8);
jbe@384 1836 return 0;
jbe@384 1837 }
jbe@384 1838 lua_settop(L, 5);
jbe@384 1839 // check proxy access to document in special column:
jbe@384 1840 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1841 if (lua_toboolean(L, 6)) {
jbe@414 1842 lua_gettable(L, 5); // 6
jbe@414 1843 if (lua_isnil(L, 6)) {
jbe@414 1844 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1845 }
jbe@414 1846 lua_pushvalue(L, 2); // 7
jbe@414 1847 lua_pushvalue(L, 3); // 8
jbe@414 1848 lua_settable(L, 6);
jbe@414 1849 return 0;
jbe@384 1850 }
jbe@384 1851 lua_settop(L, 5);
jbe@384 1852 // store value in data field info:
jbe@384 1853 lua_pushvalue(L, 2); // 6
jbe@384 1854 lua_pushvalue(L, 3); // 7
jbe@384 1855 lua_settable(L, 5);
jbe@384 1856 lua_settop(L, 4);
jbe@384 1857 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1858 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1859 lua_pushvalue(L, 2); // 6
jbe@384 1860 lua_pushboolean(L, 1); // 7
jbe@384 1861 lua_settable(L, 5);
jbe@384 1862 lua_settop(L, 4);
jbe@384 1863 // reset reference cache, if neccessary:
jbe@384 1864 lua_pushcfunction(L,
jbe@384 1865 mondelefant_class_get_foreign_key_reference_name
jbe@384 1866 ); // 5
jbe@384 1867 lua_pushvalue(L, 4); // 6
jbe@384 1868 lua_pushvalue(L, 2); // 7
jbe@384 1869 lua_call(L, 2, 1); // 5
jbe@384 1870 if (!lua_isnil(L, 5)) {
jbe@384 1871 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1872 lua_pushvalue(L, 5); // 7
jbe@382 1873 lua_pushnil(L); // 8
jbe@382 1874 lua_settable(L, 6);
jbe/bsw@0 1875 }
jbe/bsw@0 1876 return 0;
jbe@23 1877 } else { // non-objects (i.e. lists)
jbe@23 1878 // perform rawset:
jbe/bsw@0 1879 lua_settop(L, 3);
jbe/bsw@0 1880 lua_rawset(L, 1);
jbe/bsw@0 1881 return 0;
jbe/bsw@0 1882 }
jbe/bsw@0 1883 }
jbe/bsw@0 1884
jbe@416 1885 // meta-method "__index" of column proxy:
jbe@416 1886 static int mondelefant_columns_index(lua_State *L) {
jbe@416 1887 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1888 lua_settop(L, 2);
jbe@416 1889 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 3
jbe@436 1890 // try primary keys of referenced objects:
jbe@436 1891 lua_pushcfunction(L,
jbe@436 1892 mondelefant_class_get_foreign_key_reference_name
jbe@436 1893 ); // 4
jbe@436 1894 lua_getfield(L, 3, "_class"); // 5
jbe@436 1895 lua_pushvalue(L, 2); // 6
jbe@436 1896 lua_call(L, 2, 1); // 4
jbe@436 1897 if (!lua_isnil(L, 4)) {
jbe@436 1898 // reference name at stack position 4
jbe@436 1899 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@436 1900 lua_getfield(L, 3, "_class"); // 6
jbe@436 1901 lua_pushvalue(L, 4); // 7
jbe@436 1902 lua_call(L, 2, 1); // reference info at stack position 5
jbe@436 1903 lua_getfield(L, 3, "_ref"); // 6
jbe@436 1904 lua_getfield(L, 5, "ref"); // 7
jbe@436 1905 lua_gettable(L, 6); // 7
jbe@436 1906 if (!lua_isnil(L, 7)) {
jbe@436 1907 if (lua_toboolean(L, 7)) {
jbe@436 1908 lua_getfield(L, 5, "that_key"); // 8
jbe@436 1909 if (lua_isnil(L, 8)) {
jbe@436 1910 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe@436 1911 }
jbe@436 1912 lua_gettable(L, 7); // 8
jbe@436 1913 } else {
jbe@436 1914 lua_pushnil(L);
jbe@436 1915 }
jbe@436 1916 return 1;
jbe@436 1917 }
jbe@436 1918 }
jbe@436 1919 lua_settop(L, 3);
jbe@436 1920 // if not successful, use _data table:
jbe@416 1921 lua_getfield(L, 3, "_data"); // 4
jbe@416 1922 lua_pushvalue(L, 2); // 5
jbe@416 1923 lua_gettable(L, 4); // 5
jbe@416 1924 return 1;
jbe@416 1925 }
jbe@416 1926
jbe@416 1927 // meta-method "__newindex" of column proxy:
jbe@416 1928 static int mondelefant_columns_newindex(lua_State *L) {
jbe@416 1929 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1930 lua_settop(L, 3);
jbe@416 1931 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 4
jbe@436 1932 // reset reference cache, if neccessary:
jbe@436 1933 lua_pushcfunction(L,
jbe@436 1934 mondelefant_class_get_foreign_key_reference_name
jbe@436 1935 ); // 5
jbe@436 1936 lua_getfield(L, 4, "_class"); // 6
jbe@436 1937 lua_pushvalue(L, 2); // 7
jbe@436 1938 lua_call(L, 2, 1); // 5
jbe@436 1939 if (!lua_isnil(L, 5)) {
jbe@436 1940 lua_getfield(L, 4, "_ref"); // 6
jbe@436 1941 lua_pushvalue(L, 5); // 7
jbe@436 1942 lua_pushnil(L); // 8
jbe@436 1943 lua_settable(L, 6);
jbe@436 1944 }
jbe@436 1945 lua_settop(L, 4);
jbe@436 1946 // set _data and _dirty:
jbe@416 1947 lua_getfield(L, 4, "_data"); // 5
jbe@416 1948 lua_getfield(L, 4, "_dirty"); // 6
jbe@416 1949 lua_pushvalue(L, 2);
jbe@416 1950 lua_pushvalue(L, 3);
jbe@416 1951 lua_settable(L, 5);
jbe@416 1952 lua_pushvalue(L, 2);
jbe@416 1953 lua_pushboolean(L, 1);
jbe@416 1954 lua_settable(L, 6);
jbe@416 1955 return 0;
jbe@416 1956 }
jbe@416 1957
jbe@23 1958 // meta-method "__index" of classes (models):
jbe/bsw@0 1959 static int mondelefant_class_index(lua_State *L) {
jbe@23 1960 // perform lookup in prototype:
jbe/bsw@0 1961 lua_settop(L, 2);
jbe/bsw@0 1962 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1963 lua_rawget(L, 1); // 3
jbe/bsw@0 1964 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1965 lua_gettable(L, 3); // 4
jbe/bsw@0 1966 return 1;
jbe/bsw@0 1967 }
jbe/bsw@0 1968
jbe@23 1969 // registration information for functions of library:
jbe/bsw@0 1970 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1971 {"connect", mondelefant_connect},
jbe/bsw@0 1972 {"set_class", mondelefant_set_class},
jbe/bsw@0 1973 {"new_class", mondelefant_new_class},
jbe/bsw@0 1974 {NULL, NULL}
jbe/bsw@0 1975 };
jbe/bsw@0 1976
jbe@23 1977 // registration information for meta-methods of database connections:
jbe/bsw@0 1978 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1979 {"__gc", mondelefant_conn_free},
jbe/bsw@0 1980 {"__index", mondelefant_conn_index},
jbe/bsw@0 1981 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 1982 {NULL, NULL}
jbe/bsw@0 1983 };
jbe/bsw@0 1984
jbe@23 1985 // registration information for methods of database connections:
jbe/bsw@0 1986 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 1987 {"close", mondelefant_conn_close},
jbe/bsw@0 1988 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 1989 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@397 1990 {"try_wait", mondelefant_conn_try_wait},
jbe@393 1991 {"wait", mondelefant_conn_wait},
jbe/bsw@0 1992 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 1993 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 1994 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 1995 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 1996 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 1997 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 1998 {"query", mondelefant_conn_query},
jbe/bsw@0 1999 {NULL, NULL}
jbe/bsw@0 2000 };
jbe/bsw@0 2001
jbe@23 2002 // registration information for meta-methods of error objects:
jbe/bsw@0 2003 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe@472 2004 {"__tostring", mondelefant_errorobject_tostring},
jbe/bsw@0 2005 {NULL, NULL}
jbe/bsw@0 2006 };
jbe/bsw@0 2007
jbe@23 2008 // registration information for methods of error objects:
jbe/bsw@0 2009 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe@397 2010 {"escalate", lua_error},
jbe/bsw@0 2011 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 2012 {NULL, NULL}
jbe/bsw@0 2013 };
jbe/bsw@0 2014
jbe@23 2015 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 2016 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 2017 {"__index", mondelefant_result_index},
jbe/bsw@0 2018 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 2019 {NULL, NULL}
jbe/bsw@0 2020 };
jbe/bsw@0 2021
jbe@416 2022 // registration information for meta-methods of classes (models):
jbe/bsw@0 2023 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 2024 {"__index", mondelefant_class_index},
jbe/bsw@0 2025 {NULL, NULL}
jbe/bsw@0 2026 };
jbe/bsw@0 2027
jbe@23 2028 // registration information for methods of classes (models):
jbe/bsw@0 2029 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 2030 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 2031 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 2032 {"get_foreign_key_reference_name",
jbe/bsw@0 2033 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 2034 {NULL, NULL}
jbe/bsw@0 2035 };
jbe/bsw@0 2036
jbe@23 2037 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 2038 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 2039 {NULL, NULL}
jbe/bsw@0 2040 };
jbe/bsw@0 2041
jbe@23 2042 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 2043 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 2044 {NULL, NULL}
jbe/bsw@0 2045 };
jbe/bsw@0 2046
jbe@416 2047 // registration information for meta-methods of column proxy:
jbe@416 2048 static const struct luaL_Reg mondelefant_columns_mt_functions[] = {
jbe@416 2049 {"__index", mondelefant_columns_index},
jbe@416 2050 {"__newindex", mondelefant_columns_newindex},
jbe@416 2051 {NULL, NULL}
jbe@416 2052 };
jbe@416 2053
jbe@23 2054 // luaopen function to initialize/register library:
jbe/bsw@0 2055 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 2056 lua_settop(L, 0);
jbe@416 2057
jbe@416 2058 lua_newtable(L); // meta-table for columns proxy
jbe@416 2059 luaL_setfuncs(L, mondelefant_columns_mt_functions, 0);
jbe@416 2060 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 2061
jbe/bsw@0 2062 lua_newtable(L); // module at stack position 1
jbe@64 2063 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe/bsw@0 2064
jbe/bsw@0 2065 lua_pushvalue(L, 1); // 2
jbe/bsw@0 2066 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 2067
jbe/bsw@0 2068 lua_newtable(L); // 2
jbe/bsw@0 2069 // NOTE: only PostgreSQL is supported yet:
jbe@64 2070 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe/bsw@0 2071 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 2072 lua_newtable(L); // 2
jbe/bsw@0 2073 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 2074
jbe/bsw@0 2075 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 2076 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe/bsw@0 2077 lua_settop(L, 1);
jbe/bsw@0 2078 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 2079 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe/bsw@0 2080 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 2081 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 2082 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe/bsw@0 2083 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 2084
jbe/bsw@0 2085 lua_newtable(L); // 2
jbe@272 2086 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe/bsw@0 2087 lua_newtable(L); // 3
jbe@64 2088 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe/bsw@0 2089 lua_setfield(L, 2, "object");
jbe/bsw@0 2090 lua_newtable(L); // 3
jbe/bsw@0 2091 lua_setfield(L, 2, "object_get");
jbe/bsw@0 2092 lua_newtable(L); // 3
jbe/bsw@0 2093 lua_setfield(L, 2, "object_set");
jbe/bsw@0 2094 lua_newtable(L); // 3
jbe@64 2095 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe/bsw@0 2096 lua_setfield(L, 2, "list");
jbe/bsw@0 2097 lua_newtable(L); // 3
jbe/bsw@0 2098 lua_setfield(L, 2, "references");
jbe/bsw@0 2099 lua_newtable(L); // 3
jbe/bsw@0 2100 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 2101 lua_pushvalue(L, 2); // 3
jbe/bsw@0 2102 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 2103 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 2104
jbe/bsw@0 2105 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 2106 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe/bsw@0 2107 lua_newtable(L); // 3
jbe@64 2108 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe/bsw@0 2109 lua_setfield(L, 2, "__index");
jbe/bsw@0 2110 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 2111
jbe/bsw@0 2112 return 1;
jbe/bsw@0 2113 }

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