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annotate libraries/mondelefant/mondelefant_native.c @ 439:29b1f7a04934

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Updated documentation
author jbe
date Fri Feb 05 01:26:00 2016 +0100 (2016-02-05)
parents 1dbbe4c62f08
children 66d7a0ac9c9d
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@436 537 // create new table on stack position 2:
jbe@436 538 lua_settop(L, 1);
jbe@436 539 lua_newtable(L); // 2
jbe@23 540 // set meta-table for database result lists/objects:
jbe@406 541 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 542 // set "_connection" attribute to self:
jbe/bsw@0 543 lua_pushvalue(L, 1); // 3
jbe/bsw@0 544 lua_setfield(L, 2, "_connection");
jbe@23 545 // set "_type" attribute to string "list":
jbe/bsw@0 546 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 547 lua_setfield(L, 2, "_type");
jbe@436 548 // set "_class" attribute to default class:
jbe@436 549 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe@436 550 lua_setfield(L, 2, "_class");
jbe@23 551 // return created database result list:
jbe/bsw@0 552 return 1;
jbe/bsw@0 553 }
jbe/bsw@0 554
jbe@23 555 // method "create_object" of database handles:
jbe/bsw@0 556 static int mondelefant_conn_create_object(lua_State *L) {
jbe@23 557 // ensure that first argument is a database connection:
jbe/bsw@0 558 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
jbe@436 559 // create new table on stack position 2:
jbe@436 560 lua_settop(L, 1);
jbe@436 561 lua_newtable(L); // 2
jbe@397 562 // set meta-table for database result lists/objects:
jbe@406 563 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
jbe@23 564 // set "_connection" attribute to self:
jbe/bsw@0 565 lua_pushvalue(L, 1); // 3
jbe/bsw@0 566 lua_setfield(L, 2, "_connection");
jbe@23 567 // set "_type" attribute to string "object":
jbe/bsw@0 568 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 569 lua_setfield(L, 2, "_type"); // "object" or "list"
jbe@436 570 // set "_class" attribute to default class:
jbe@436 571 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 3
jbe@436 572 lua_setfield(L, 2, "_class");
jbe@23 573 // create empty tables for "_data", "_dirty" and "_ref" attributes:
jbe/bsw@0 574 lua_newtable(L); // 3
jbe/bsw@0 575 lua_setfield(L, 2, "_data");
jbe/bsw@0 576 lua_newtable(L); // 3
jbe/bsw@0 577 lua_setfield(L, 2, "_dirty");
jbe/bsw@0 578 lua_newtable(L); // 3
jbe/bsw@0 579 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
jbe@417 580 // create column proxy (field "_col" in result object):
jbe@416 581 lua_newtable(L); // 3
jbe@416 582 luaL_setmetatable(L, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 583 lua_pushvalue(L, 2); // 4
jbe@416 584 lua_rawsetp(L, 3, MONDELEFANT_COLUMNS_RESULT_LUKEY);
jbe@417 585 lua_setfield(L, 2, "_col");
jbe@416 586 // return created database result object (from stack position 2):
jbe/bsw@0 587 return 1;
jbe/bsw@0 588 }
jbe/bsw@0 589
jbe@23 590 // method "quote_string" of database handles:
jbe/bsw@0 591 static int mondelefant_conn_quote_string(lua_State *L) {
jbe/bsw@0 592 mondelefant_conn_t *conn;
jbe/bsw@0 593 const char *input;
jbe/bsw@0 594 size_t input_len;
jbe@407 595 luaL_Buffer buf;
jbe/bsw@0 596 char *output;
jbe/bsw@0 597 size_t output_len;
jbe@407 598 // get database connection object:
jbe/bsw@0 599 conn = mondelefant_get_conn(L, 1);
jbe@23 600 // get second argument, which must be a string:
jbe/bsw@0 601 input = luaL_checklstring(L, 2, &input_len);
jbe@23 602 // throw error, if string is too long:
jbe/bsw@0 603 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
jbe/bsw@0 604 return luaL_error(L, "String to be escaped is too long.");
jbe/bsw@0 605 }
jbe@23 606 // allocate memory for quoted string:
jbe@407 607 output = luaL_buffinitsize(L, &buf, (2 * input_len + 3) * sizeof(char));
jbe@23 608 // do escaping by calling PQescapeStringConn and enclosing result with
jbe@23 609 // single quotes:
jbe/bsw@0 610 output[0] = '\'';
jbe/bsw@0 611 output_len = PQescapeStringConn(
jbe/bsw@0 612 conn->pgconn, output + 1, input, input_len, NULL
jbe/bsw@0 613 );
jbe/bsw@0 614 output[output_len + 1] = '\'';
jbe/bsw@0 615 output[output_len + 2] = 0;
jbe@23 616 // create Lua string:
jbe@407 617 luaL_addsize(&buf, output_len + 2);
jbe@424 618 luaL_pushresult(&buf);
jbe@23 619 // return Lua string:
jbe/bsw@0 620 return 1;
jbe/bsw@0 621 }
jbe/bsw@0 622
jbe@23 623 // method "quote_binary" of database handles:
jbe/bsw@0 624 static int mondelefant_conn_quote_binary(lua_State *L) {
jbe/bsw@0 625 mondelefant_conn_t *conn;
jbe/bsw@0 626 const char *input;
jbe/bsw@0 627 size_t input_len;
jbe/bsw@0 628 char *output;
jbe/bsw@0 629 size_t output_len;
jbe/bsw@0 630 luaL_Buffer buf;
jbe@407 631 // get database connection object:
jbe/bsw@0 632 conn = mondelefant_get_conn(L, 1);
jbe@23 633 // get second argument, which must be a string:
jbe/bsw@0 634 input = luaL_checklstring(L, 2, &input_len);
jbe@408 635 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 636 if (conn->todo_PQfreemem) {
jbe@410 637 PQfreemem(conn->todo_PQfreemem);
jbe@410 638 conn->todo_PQfreemem = NULL;
jbe@410 639 }
jbe@23 640 // call PQescapeByteaConn, which allocates memory itself:
jbe/bsw@0 641 output = (char *)PQescapeByteaConn(
jbe/bsw@0 642 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe/bsw@0 643 );
jbe/bsw@0 644 if (!output) {
jbe@408 645 lua_gc(L, LUA_GCCOLLECT, 0);
jbe@408 646 output = (char *)PQescapeByteaConn(
jbe@408 647 conn->pgconn, (const unsigned char *)input, input_len, &output_len
jbe@408 648 );
jbe@408 649 if (!output) {
jbe@408 650 return luaL_error(L, "Could not allocate memory for binary quoting.");
jbe@408 651 }
jbe/bsw@0 652 }
jbe@412 653 // ensure call of PQfreemem in case of out-of-memory errors:
jbe@408 654 conn->todo_PQfreemem = output;
jbe@23 655 // create Lua string enclosed by single quotes:
jbe/bsw@0 656 luaL_buffinit(L, &buf);
jbe/bsw@0 657 luaL_addchar(&buf, '\'');
jbe/bsw@0 658 luaL_addlstring(&buf, output, output_len - 1);
jbe/bsw@0 659 luaL_addchar(&buf, '\'');
jbe/bsw@0 660 luaL_pushresult(&buf);
jbe@23 661 // free memory allocated by PQescapeByteaConn:
jbe/bsw@0 662 PQfreemem(output);
jbe@408 663 // avoid double call of PQfreemem later:
jbe@408 664 conn->todo_PQfreemem = NULL;
jbe@23 665 // return Lua string:
jbe/bsw@0 666 return 1;
jbe/bsw@0 667 }
jbe/bsw@0 668
jbe@23 669 // method "assemble_command" of database handles:
jbe/bsw@0 670 static int mondelefant_conn_assemble_command(lua_State *L) {
jbe/bsw@0 671 mondelefant_conn_t *conn;
jbe/bsw@0 672 int paramidx = 2;
jbe/bsw@0 673 const char *template;
jbe/bsw@0 674 size_t template_pos = 0;
jbe/bsw@0 675 luaL_Buffer buf;
jbe@407 676 // get database connection object:
jbe/bsw@0 677 conn = mondelefant_get_conn(L, 1);
jbe@23 678 // if second argument is a string, return this string:
jbe@397 679 if (lua_type(L, 2) == LUA_TSTRING) {
jbe@397 680 lua_settop(L, 2);
jbe/bsw@0 681 return 1;
jbe/bsw@0 682 }
jbe@23 683 // if second argument has __tostring meta-method,
jbe@23 684 // then use this method and return its result:
jbe/bsw@0 685 if (luaL_callmeta(L, 2, "__tostring")) return 1;
jbe@23 686 // otherwise, require that second argument is a table:
jbe/bsw@0 687 luaL_checktype(L, 2, LUA_TTABLE);
jbe@397 688 // set stack top:
jbe@397 689 lua_settop(L, 2);
jbe@23 690 // get first element of table, which must be a string:
jbe/bsw@0 691 lua_rawgeti(L, 2, 1); // 3
jbe/bsw@0 692 luaL_argcheck(L,
jbe/bsw@0 693 lua_isstring(L, 3),
jbe/bsw@0 694 2,
jbe/bsw@0 695 "First entry of SQL command structure is not a string."
jbe/bsw@0 696 );
jbe/bsw@0 697 template = lua_tostring(L, 3);
jbe@23 698 // get value of "input_converter" attribute of database connection:
jbe/bsw@0 699 lua_pushliteral(L, "input_converter"); // 4
jbe/bsw@0 700 lua_gettable(L, 1); // input_converter at stack position 4
jbe@23 701 // reserve space on Lua stack:
jbe/bsw@0 702 lua_pushnil(L); // free space at stack position 5
jbe/bsw@0 703 lua_pushnil(L); // free space at stack position 6
jbe@23 704 // initialize Lua buffer for result string:
jbe/bsw@0 705 luaL_buffinit(L, &buf);
jbe@23 706 // fill buffer in loop:
jbe/bsw@0 707 while (1) {
jbe@23 708 // variable declaration:
jbe/bsw@0 709 char c;
jbe@23 710 // get next character:
jbe/bsw@0 711 c = template[template_pos++];
jbe@23 712 // break, when character is NULL byte:
jbe/bsw@0 713 if (!c) break;
jbe@23 714 // question-mark and dollar-sign are special characters:
jbe@23 715 if (c == '?' || c == '$') { // special character found
jbe@23 716 // check, if same character follows:
jbe@23 717 if (template[template_pos] == c) { // special character is escaped
jbe@23 718 // consume two characters of input and add one character to buffer:
jbe/bsw@0 719 template_pos++;
jbe/bsw@0 720 luaL_addchar(&buf, c);
jbe@23 721 } else { // special character is not escaped
jbe/bsw@0 722 luaL_Buffer keybuf;
jbe/bsw@0 723 int subcmd;
jbe@23 724 // set 'subcmd' = true, if special character was a dollar-sign,
jbe@23 725 // set 'subcmd' = false, if special character was a question-mark:
jbe/bsw@0 726 subcmd = (c == '$');
jbe@23 727 // read any number of alpha numeric chars or underscores
jbe@23 728 // and store them on Lua stack:
jbe/bsw@0 729 luaL_buffinit(L, &keybuf);
jbe/bsw@0 730 while (1) {
jbe/bsw@0 731 c = template[template_pos];
jbe/bsw@0 732 if (
jbe/bsw@0 733 (c < 'A' || c > 'Z') &&
jbe/bsw@0 734 (c < 'a' || c > 'z') &&
jbe/bsw@0 735 (c < '0' || c > '9') &&
jbe/bsw@0 736 (c != '_')
jbe/bsw@0 737 ) break;
jbe/bsw@0 738 luaL_addchar(&keybuf, c);
jbe/bsw@0 739 template_pos++;
jbe/bsw@0 740 }
jbe/bsw@0 741 luaL_pushresult(&keybuf);
jbe@23 742 // check, if any characters matched:
jbe@64 743 if (lua_rawlen(L, -1)) {
jbe@23 744 // if any alpha numeric chars or underscores were found,
jbe@23 745 // push them on stack as a Lua string and use them to lookup
jbe@23 746 // value from second argument:
jbe/bsw@0 747 lua_pushvalue(L, -1); // save key on stack
jbe@23 748 lua_gettable(L, 2); // fetch value (raw-value)
jbe/bsw@0 749 } else {
jbe@23 750 // otherwise push nil and use numeric lookup based on 'paramidx':
jbe/bsw@0 751 lua_pop(L, 1);
jbe/bsw@0 752 lua_pushnil(L); // put nil on key position
jbe@23 753 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
jbe/bsw@0 754 }
jbe@23 755 // Lua stack contains: ..., <buffer>, key, raw-value
jbe@23 756 // branch according to type of special character ("?" or "$"):
jbe@23 757 if (subcmd) { // dollar-sign
jbe/bsw@0 758 size_t i;
jbe/bsw@0 759 size_t count;
jbe@23 760 // store fetched value (which is supposed to be sub-structure)
jbe@23 761 // on Lua stack position 5 and drop key:
jbe@23 762 lua_replace(L, 5);
jbe@23 763 lua_pop(L, 1);
jbe@23 764 // Lua stack contains: ..., <buffer>
jbe@23 765 // check, if fetched value is really a sub-structure:
jbe/bsw@0 766 luaL_argcheck(L,
jbe/bsw@0 767 !lua_isnil(L, 5),
jbe/bsw@0 768 2,
jbe/bsw@0 769 "SQL sub-structure not found."
jbe/bsw@0 770 );
jbe/bsw@0 771 luaL_argcheck(L,
jbe/bsw@0 772 lua_type(L, 5) == LUA_TTABLE,
jbe/bsw@0 773 2,
jbe/bsw@0 774 "SQL sub-structure must be a table."
jbe/bsw@0 775 );
jbe@23 776 // Lua stack contains: ..., <buffer>
jbe@23 777 // get value of "sep" attribute of sub-structure,
jbe@23 778 // and place it on Lua stack position 6:
jbe/bsw@0 779 lua_getfield(L, 5, "sep");
jbe@23 780 lua_replace(L, 6);
jbe@23 781 // if seperator is nil, then use ", " as default,
jbe@23 782 // if seperator is neither nil nor a string, then throw error:
jbe/bsw@0 783 if (lua_isnil(L, 6)) {
jbe/bsw@0 784 lua_pushstring(L, ", ");
jbe/bsw@0 785 lua_replace(L, 6);
jbe/bsw@0 786 } else {
jbe/bsw@0 787 luaL_argcheck(L,
jbe/bsw@0 788 lua_isstring(L, 6),
jbe/bsw@0 789 2,
jbe/bsw@0 790 "Seperator of SQL sub-structure has to be a string."
jbe/bsw@0 791 );
jbe/bsw@0 792 }
jbe@23 793 // iterate over items of sub-structure:
jbe@64 794 count = lua_rawlen(L, 5);
jbe/bsw@0 795 for (i = 0; i < count; i++) {
jbe@23 796 // add seperator, unless this is the first run:
jbe/bsw@0 797 if (i) {
jbe/bsw@0 798 lua_pushvalue(L, 6);
jbe/bsw@0 799 luaL_addvalue(&buf);
jbe/bsw@0 800 }
jbe@23 801 // recursivly apply assemble function and add results to buffer:
jbe/bsw@0 802 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 803 lua_pushvalue(L, 1);
jbe/bsw@0 804 lua_rawgeti(L, 5, i+1);
jbe/bsw@0 805 lua_call(L, 2, 1);
jbe/bsw@0 806 luaL_addvalue(&buf);
jbe/bsw@0 807 }
jbe@23 808 } else { // question-mark
jbe/bsw@0 809 if (lua_toboolean(L, 4)) {
jbe@23 810 // call input_converter with connection handle, raw-value and
jbe@23 811 // an info-table which contains a "field_name" entry with the
jbe@23 812 // used key:
jbe/bsw@0 813 lua_pushvalue(L, 4);
jbe/bsw@0 814 lua_pushvalue(L, 1);
jbe/bsw@0 815 lua_pushvalue(L, -3);
jbe/bsw@0 816 lua_newtable(L);
jbe/bsw@0 817 lua_pushvalue(L, -6);
jbe/bsw@0 818 lua_setfield(L, -2, "field_name");
jbe/bsw@0 819 lua_call(L, 3, 1);
jbe@23 820 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
jbe@23 821 // remove key and raw-value:
jbe/bsw@0 822 lua_remove(L, -2);
jbe/bsw@0 823 lua_remove(L, -2);
jbe@23 824 // Lua stack contains: ..., <buffer>, final-value
jbe@23 825 // throw error, if final-value is not a string:
jbe/bsw@0 826 if (!lua_isstring(L, -1)) {
jbe/bsw@0 827 return luaL_error(L, "input_converter returned non-string.");
jbe/bsw@0 828 }
jbe/bsw@0 829 } else {
jbe@23 830 // remove key from stack:
jbe/bsw@0 831 lua_remove(L, -2);
jbe@23 832 // Lua stack contains: ..., <buffer>, raw-value
jbe@23 833 // branch according to type of value:
jbe@408 834 // NOTE: Lua automatically converts numbers to strings
jbe@23 835 if (lua_isnil(L, -1)) { // value is nil
jbe@23 836 // push string "NULL" to stack:
jbe/bsw@0 837 lua_pushliteral(L, "NULL");
jbe@23 838 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
jbe@23 839 // push strings "TRUE" or "FALSE" to stack:
jbe/bsw@0 840 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
jbe@23 841 } else if (lua_isstring(L, -1)) { // value is string or number
jbe@408 842 // push output of "quote_string" method of database connection
jbe@408 843 // to stack:
jbe/bsw@0 844 lua_tostring(L, -1);
jbe/bsw@0 845 lua_pushcfunction(L, mondelefant_conn_quote_string);
jbe/bsw@0 846 lua_pushvalue(L, 1);
jbe/bsw@0 847 lua_pushvalue(L, -3);
jbe/bsw@0 848 lua_call(L, 2, 1);
jbe@23 849 } else { // value is of other type
jbe@23 850 // throw error:
jbe/bsw@0 851 return luaL_error(L,
jbe/bsw@0 852 "Unable to convert SQL value due to unknown type "
jbe/bsw@0 853 "or missing input_converter."
jbe/bsw@0 854 );
jbe/bsw@0 855 }
jbe@23 856 // Lua stack contains: ..., <buffer>, raw-value, final-value
jbe@23 857 // remove raw-value:
jbe/bsw@0 858 lua_remove(L, -2);
jbe@23 859 // Lua stack contains: ..., <buffer>, final-value
jbe/bsw@0 860 }
jbe@23 861 // append final-value to buffer:
jbe/bsw@0 862 luaL_addvalue(&buf);
jbe/bsw@0 863 }
jbe/bsw@0 864 }
jbe@23 865 } else { // character is not special
jbe@23 866 // just copy character:
jbe/bsw@0 867 luaL_addchar(&buf, c);
jbe/bsw@0 868 }
jbe/bsw@0 869 }
jbe@23 870 // return string in buffer:
jbe/bsw@0 871 luaL_pushresult(&buf);
jbe/bsw@0 872 return 1;
jbe/bsw@0 873 }
jbe/bsw@0 874
jbe@23 875 // max number of SQL statements executed by one "query" method call:
jbe/bsw@0 876 #define MONDELEFANT_MAX_COMMAND_COUNT 64
jbe@23 877 // max number of columns in a database result:
jbe/bsw@0 878 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
jbe@23 879 // enum values for 'modes' array in C-function below:
jbe/bsw@0 880 #define MONDELEFANT_QUERY_MODE_LIST 1
jbe/bsw@0 881 #define MONDELEFANT_QUERY_MODE_OBJECT 2
jbe/bsw@0 882 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
jbe/bsw@0 883
jbe@23 884 // method "try_query" of database handles:
jbe/bsw@0 885 static int mondelefant_conn_try_query(lua_State *L) {
jbe/bsw@0 886 mondelefant_conn_t *conn;
jbe/bsw@0 887 int command_count;
jbe/bsw@0 888 int command_idx;
jbe/bsw@0 889 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
jbe/bsw@0 890 luaL_Buffer buf;
jbe/bsw@0 891 int sent_success;
jbe/bsw@0 892 PGresult *res;
jbe/bsw@0 893 int rows, cols, row, col;
jbe@407 894 // get database connection object:
jbe/bsw@0 895 conn = mondelefant_get_conn(L, 1);
jbe@23 896 // calculate number of commands (2 arguments for one command):
jbe/bsw@0 897 command_count = lua_gettop(L) / 2;
jbe@23 898 // push nil on stack, which is needed, if last mode was ommitted:
jbe@23 899 lua_pushnil(L);
jbe@23 900 // throw error, if number of commands is too high:
jbe/bsw@0 901 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
jbe/bsw@0 902 return luaL_error(L, "Exceeded maximum command count in one query.");
jbe/bsw@0 903 }
jbe@23 904 // create SQL string, store query modes and push SQL string on stack:
jbe/bsw@0 905 luaL_buffinit(L, &buf);
jbe/bsw@0 906 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 907 int mode;
jbe/bsw@0 908 int mode_idx; // stack index of mode string
jbe/bsw@0 909 if (command_idx) luaL_addchar(&buf, ' ');
jbe/bsw@0 910 lua_pushcfunction(L, mondelefant_conn_assemble_command);
jbe/bsw@0 911 lua_pushvalue(L, 1);
jbe/bsw@0 912 lua_pushvalue(L, 2 + 2 * command_idx);
jbe/bsw@0 913 lua_call(L, 2, 1);
jbe/bsw@0 914 luaL_addvalue(&buf);
jbe/bsw@0 915 luaL_addchar(&buf, ';');
jbe/bsw@0 916 mode_idx = 3 + 2 * command_idx;
jbe/bsw@0 917 if (lua_isnil(L, mode_idx)) {
jbe/bsw@0 918 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 919 } else {
jbe/bsw@0 920 const char *modestr;
jbe/bsw@0 921 modestr = luaL_checkstring(L, mode_idx);
jbe/bsw@0 922 if (!strcmp(modestr, "list")) {
jbe/bsw@0 923 mode = MONDELEFANT_QUERY_MODE_LIST;
jbe/bsw@0 924 } else if (!strcmp(modestr, "object")) {
jbe/bsw@0 925 mode = MONDELEFANT_QUERY_MODE_OBJECT;
jbe/bsw@0 926 } else if (!strcmp(modestr, "opt_object")) {
jbe/bsw@0 927 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
jbe/bsw@0 928 } else {
jbe@397 929 return luaL_argerror(L, mode_idx, "unknown query mode");
jbe/bsw@0 930 }
jbe/bsw@0 931 }
jbe/bsw@0 932 modes[command_idx] = mode;
jbe/bsw@0 933 }
jbe/bsw@0 934 luaL_pushresult(&buf); // stack position unknown
jbe/bsw@0 935 lua_replace(L, 2); // SQL command string to stack position 2
jbe@23 936 // call sql_tracer, if set:
jbe/bsw@0 937 lua_settop(L, 2);
jbe/bsw@0 938 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
jbe/bsw@0 939 if (lua_toboolean(L, 3)) {
jbe/bsw@0 940 lua_pushvalue(L, 1); // 4
jbe/bsw@0 941 lua_pushvalue(L, 2); // 5
jbe/bsw@0 942 lua_call(L, 2, 1); // trace callback at stack position 3
jbe/bsw@0 943 }
jbe@23 944 // NOTE: If no tracer was found, then nil or false is stored at stack
jbe@23 945 // position 3.
jbe@23 946 // call PQsendQuery function and store result in 'sent_success' variable:
jbe/bsw@0 947 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
jbe@23 948 // create preliminary result table:
jbe/bsw@0 949 lua_newtable(L); // results in table at stack position 4
jbe@23 950 // iterate over results using function PQgetResult to fill result table:
jbe/bsw@0 951 for (command_idx = 0; ; command_idx++) {
jbe/bsw@0 952 int mode;
jbe/bsw@0 953 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
jbe/bsw@0 954 ExecStatusType pgstatus;
jbe@23 955 // fetch mode which was given for the command:
jbe/bsw@0 956 mode = modes[command_idx];
jbe@23 957 // if PQsendQuery call was successful, then fetch result data:
jbe/bsw@0 958 if (sent_success) {
jbe@408 959 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@410 960 if (conn->todo_PQclear) {
jbe@410 961 PQclear(conn->todo_PQclear);
jbe@410 962 conn->todo_PQclear = NULL;
jbe@410 963 }
jbe@23 964 // NOTE: PQgetResult called one extra time. Break only, if all
jbe@23 965 // queries have been processed and PQgetResult returned NULL.
jbe/bsw@0 966 res = PQgetResult(conn->pgconn);
jbe/bsw@0 967 if (command_idx >= command_count && !res) break;
jbe/bsw@0 968 if (res) {
jbe/bsw@0 969 pgstatus = PQresultStatus(res);
jbe/bsw@0 970 rows = PQntuples(res);
jbe/bsw@0 971 cols = PQnfields(res);
jbe@412 972 // ensure call of PQclear in case of Lua errors:
jbe@408 973 conn->todo_PQclear = res;
jbe/bsw@0 974 }
jbe/bsw@0 975 }
jbe@23 976 // handle errors:
jbe/bsw@0 977 if (
jbe/bsw@0 978 !sent_success || command_idx >= command_count || !res ||
jbe/bsw@0 979 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
jbe/bsw@0 980 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
jbe/bsw@0 981 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
jbe/bsw@0 982 ) {
jbe/bsw@0 983 const char *command;
jbe/bsw@0 984 command = lua_tostring(L, 2);
jbe/bsw@0 985 lua_newtable(L); // 5
jbe@406 986 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
jbe/bsw@0 987 lua_pushvalue(L, 1);
jbe/bsw@0 988 lua_setfield(L, 5, "connection");
jbe/bsw@0 989 lua_pushvalue(L, 2);
jbe/bsw@0 990 lua_setfield(L, 5, "sql_command");
jbe@397 991 if (!sent_success) {
jbe@397 992 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
jbe/bsw@0 993 lua_setfield(L, 5, "code");
jbe@397 994 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
jbe/bsw@0 995 lua_setfield(L, 5, "message");
jbe/bsw@0 996 } else {
jbe@397 997 lua_pushinteger(L, command_idx + 1);
jbe@397 998 lua_setfield(L, 5, "command_number");
jbe@397 999 if (!res) {
jbe@397 1000 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
jbe@397 1001 lua_setfield(L, 5, "code");
jbe@397 1002 lua_pushliteral(L, "Received too few database result sets.");
jbe@397 1003 lua_setfield(L, 5, "message");
jbe@397 1004 } else if (command_idx >= command_count) {
jbe@397 1005 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
jbe@397 1006 lua_setfield(L, 5, "code");
jbe@397 1007 lua_pushliteral(L, "Received too many database result sets.");
jbe@397 1008 lua_setfield(L, 5, "message");
jbe@397 1009 } else if (
jbe@397 1010 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
jbe@397 1011 ) {
jbe@397 1012 const char *sqlstate;
jbe@397 1013 const char *errmsg;
jbe@397 1014 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
jbe@397 1015 lua_setfield(L, 5, "pg_severity");
jbe@397 1016 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
jbe@397 1017 if (sqlstate) {
jbe@397 1018 lua_pushstring(L, sqlstate);
jbe@397 1019 lua_setfield(L, 5, "pg_sqlstate");
jbe@397 1020 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
jbe@397 1021 lua_setfield(L, 5, "code");
jbe@397 1022 } else {
jbe@397 1023 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
jbe@397 1024 lua_setfield(L, 5, "code");
jbe@397 1025 }
jbe@397 1026 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
jbe@397 1027 if (errmsg) {
jbe@397 1028 mondelefant_push_first_line(L, errmsg);
jbe@397 1029 lua_setfield(L, 5, "message");
jbe@397 1030 lua_pushstring(L, errmsg);
jbe@397 1031 lua_setfield(L, 5, "pg_message_primary");
jbe@397 1032 } else {
jbe@397 1033 lua_pushliteral(L,
jbe@397 1034 "Error while fetching result, but no error message given."
jbe@397 1035 );
jbe@397 1036 lua_setfield(L, 5, "message");
jbe@397 1037 }
jbe@397 1038 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
jbe@397 1039 lua_setfield(L, 5, "pg_message_detail");
jbe@397 1040 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
jbe@397 1041 lua_setfield(L, 5, "pg_message_hint");
jbe@397 1042 // NOTE: "position" and "pg_internal_position" are recalculated to
jbe@397 1043 // byte offsets, as Lua 5.2 is not Unicode aware.
jbe@397 1044 {
jbe@397 1045 char *tmp;
jbe@397 1046 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
jbe@397 1047 if (tmp) {
jbe@397 1048 int pos;
jbe@397 1049 pos = atoi(tmp) - 1;
jbe@397 1050 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1051 pos = utf8_position_to_byte(command, pos);
jbe@397 1052 }
jbe@397 1053 lua_pushinteger(L, pos + 1);
jbe@397 1054 lua_setfield(L, 5, "position");
jbe@397 1055 }
jbe@397 1056 }
jbe@397 1057 {
jbe@397 1058 const char *internal_query;
jbe@397 1059 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
jbe@397 1060 lua_pushstring(L, internal_query);
jbe@397 1061 lua_setfield(L, 5, "pg_internal_query");
jbe@397 1062 char *tmp;
jbe@397 1063 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
jbe@397 1064 if (tmp) {
jbe@397 1065 int pos;
jbe@397 1066 pos = atoi(tmp) - 1;
jbe@397 1067 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
jbe@397 1068 pos = utf8_position_to_byte(internal_query, pos);
jbe@397 1069 }
jbe@397 1070 lua_pushinteger(L, pos + 1);
jbe@397 1071 lua_setfield(L, 5, "pg_internal_position");
jbe@397 1072 }
jbe@397 1073 }
jbe@397 1074 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
jbe@397 1075 lua_setfield(L, 5, "pg_context");
jbe@397 1076 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
jbe@397 1077 lua_setfield(L, 5, "pg_source_file");
jbe@397 1078 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
jbe@397 1079 lua_setfield(L, 5, "pg_source_line");
jbe@397 1080 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
jbe@397 1081 lua_setfield(L, 5, "pg_source_function");
jbe@397 1082 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
jbe@397 1083 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
jbe@397 1084 lua_setfield(L, 5, "code");
jbe@397 1085 lua_pushliteral(L, "Expected one row, but got empty set.");
jbe@397 1086 lua_setfield(L, 5, "message");
jbe@397 1087 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
jbe@397 1088 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
jbe@397 1089 lua_setfield(L, 5, "code");
jbe@397 1090 lua_pushliteral(L, "Got more than one result row.");
jbe@397 1091 lua_setfield(L, 5, "message");
jbe@397 1092 } else {
jbe@397 1093 // should not happen
jbe@397 1094 abort();
jbe@397 1095 }
jbe@397 1096 if (res) {
jbe@397 1097 PQclear(res);
jbe@397 1098 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
jbe@408 1099 // avoid double call of PQclear later:
jbe@408 1100 conn->todo_PQclear = NULL;
jbe@397 1101 }
jbe/bsw@0 1102 }
jbe/bsw@0 1103 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1104 lua_pushvalue(L, 3);
jbe/bsw@0 1105 lua_pushvalue(L, 5);
jbe/bsw@0 1106 lua_call(L, 1, 0);
jbe/bsw@0 1107 }
jbe/bsw@0 1108 return 1;
jbe/bsw@0 1109 }
jbe@23 1110 // call "create_list" or "create_object" method of database handle,
jbe@23 1111 // result will be at stack position 5:
jbe/bsw@0 1112 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1113 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
jbe/bsw@0 1114 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1115 lua_call(L, 1, 1); // 5
jbe/bsw@0 1116 } else {
jbe/bsw@0 1117 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
jbe/bsw@0 1118 lua_pushvalue(L, 1); // 6
jbe/bsw@0 1119 lua_call(L, 1, 1); // 5
jbe/bsw@0 1120 }
jbe@23 1121 // set "_column_info":
jbe@23 1122 lua_newtable(L); // 6
jbe/bsw@0 1123 for (col = 0; col < cols; col++) {
jbe/bsw@0 1124 lua_newtable(L); // 7
jbe@380 1125 lua_pushstring(L, PQfname(res, col)); // 8
jbe@380 1126 lua_pushvalue(L, 8); // 9
jbe@380 1127 lua_pushvalue(L, 7); // 10
jbe@380 1128 lua_rawset(L, 6);
jbe/bsw@0 1129 lua_setfield(L, 7, "field_name");
jbe@380 1130 // _column_info entry (for current column) on stack position 7
jbe/bsw@0 1131 {
jbe/bsw@0 1132 Oid tmp;
jbe/bsw@0 1133 tmp = PQftable(res, col);
jbe/bsw@0 1134 if (tmp == InvalidOid) lua_pushnil(L);
jbe/bsw@0 1135 else lua_pushinteger(L, tmp);
jbe/bsw@0 1136 lua_setfield(L, 7, "table_oid");
jbe/bsw@0 1137 }
jbe/bsw@0 1138 {
jbe/bsw@0 1139 int tmp;
jbe/bsw@0 1140 tmp = PQftablecol(res, col);
jbe/bsw@0 1141 if (tmp == 0) lua_pushnil(L);
jbe/bsw@0 1142 else lua_pushinteger(L, tmp);
jbe/bsw@0 1143 lua_setfield(L, 7, "table_column_number");
jbe/bsw@0 1144 }
jbe/bsw@0 1145 {
jbe/bsw@0 1146 Oid tmp;
jbe/bsw@0 1147 tmp = PQftype(res, col);
jbe/bsw@0 1148 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
jbe/bsw@0 1149 lua_pushinteger(L, tmp);
jbe/bsw@0 1150 lua_setfield(L, 7, "type_oid");
jbe/bsw@0 1151 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
jbe/bsw@0 1152 lua_setfield(L, 7, "type");
jbe/bsw@0 1153 }
jbe/bsw@0 1154 {
jbe/bsw@0 1155 int tmp;
jbe/bsw@0 1156 tmp = PQfmod(res, col);
jbe/bsw@0 1157 if (tmp == -1) lua_pushnil(L);
jbe/bsw@0 1158 else lua_pushinteger(L, tmp);
jbe/bsw@0 1159 lua_setfield(L, 7, "type_modifier");
jbe/bsw@0 1160 }
jbe/bsw@0 1161 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1162 }
jbe@23 1163 lua_setfield(L, 5, "_column_info");
jbe@23 1164 // set "_rows_affected":
jbe/bsw@0 1165 {
jbe/bsw@0 1166 char *tmp;
jbe/bsw@0 1167 tmp = PQcmdTuples(res);
jbe/bsw@0 1168 if (tmp[0]) {
jbe/bsw@0 1169 lua_pushinteger(L, atoi(tmp));
jbe/bsw@0 1170 lua_setfield(L, 5, "_rows_affected");
jbe/bsw@0 1171 }
jbe/bsw@0 1172 }
jbe@23 1173 // set "_oid":
jbe/bsw@0 1174 {
jbe/bsw@0 1175 Oid tmp;
jbe/bsw@0 1176 tmp = PQoidValue(res);
jbe/bsw@0 1177 if (tmp != InvalidOid) {
jbe/bsw@0 1178 lua_pushinteger(L, tmp);
jbe/bsw@0 1179 lua_setfield(L, 5, "_oid");
jbe/bsw@0 1180 }
jbe/bsw@0 1181 }
jbe@23 1182 // copy data as strings or nil, while performing binary unescaping
jbe@23 1183 // automatically:
jbe/bsw@0 1184 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
jbe/bsw@0 1185 for (row = 0; row < rows; row++) {
jbe/bsw@0 1186 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
jbe/bsw@0 1187 lua_pushvalue(L, 1); // 7
jbe/bsw@0 1188 lua_call(L, 1, 1); // 6
jbe/bsw@0 1189 for (col = 0; col < cols; col++) {
jbe/bsw@0 1190 if (PQgetisnull(res, row, col)) {
jbe/bsw@0 1191 lua_pushnil(L);
jbe/bsw@0 1192 } else if (binary[col]) {
jbe/bsw@0 1193 size_t binlen;
jbe/bsw@0 1194 char *binval;
jbe@412 1195 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1196 if (conn->todo_PQfreemem) {
jbe@412 1197 PQfreemem(conn->todo_PQfreemem);
jbe@412 1198 conn->todo_PQfreemem = NULL;
jbe@412 1199 }
jbe@412 1200 // Unescape binary data:
jbe/bsw@0 1201 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1202 (unsigned char *)PQgetvalue(res, row, col), &binlen
jbe/bsw@0 1203 );
jbe/bsw@0 1204 if (!binval) {
jbe/bsw@0 1205 return luaL_error(L,
jbe/bsw@0 1206 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1207 );
jbe/bsw@0 1208 }
jbe@412 1209 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1210 conn->todo_PQfreemem = binval;
jbe@412 1211 // create Lua string:
jbe/bsw@0 1212 lua_pushlstring(L, binval, binlen);
jbe@412 1213 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1214 PQfreemem(binval);
jbe@412 1215 // avoid double call of PQfreemem later:
jbe@412 1216 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1217 } else {
jbe/bsw@0 1218 lua_pushstring(L, PQgetvalue(res, row, col));
jbe/bsw@0 1219 }
jbe/bsw@0 1220 lua_rawseti(L, 6, col+1);
jbe/bsw@0 1221 }
jbe/bsw@0 1222 lua_rawseti(L, 5, row+1);
jbe/bsw@0 1223 }
jbe/bsw@0 1224 } else if (rows == 1) {
jbe/bsw@0 1225 for (col = 0; col < cols; col++) {
jbe/bsw@0 1226 if (PQgetisnull(res, 0, col)) {
jbe/bsw@0 1227 lua_pushnil(L);
jbe/bsw@0 1228 } else if (binary[col]) {
jbe/bsw@0 1229 size_t binlen;
jbe/bsw@0 1230 char *binval;
jbe@412 1231 // avoid cumulating memory leaks in case of previous out-of-memory errors:
jbe@412 1232 if (conn->todo_PQfreemem) {
jbe@412 1233 PQfreemem(conn->todo_PQfreemem);
jbe@412 1234 conn->todo_PQfreemem = NULL;
jbe@412 1235 }
jbe@412 1236 // Unescape binary data:
jbe/bsw@0 1237 binval = (char *)PQunescapeBytea(
jbe/bsw@0 1238 (unsigned char *)PQgetvalue(res, 0, col), &binlen
jbe/bsw@0 1239 );
jbe/bsw@0 1240 if (!binval) {
jbe/bsw@0 1241 return luaL_error(L,
jbe/bsw@0 1242 "Could not allocate memory for binary unescaping."
jbe/bsw@0 1243 );
jbe/bsw@0 1244 }
jbe@412 1245 // ensure call of PQfreemem in case of out-of-memory error:
jbe@412 1246 conn->todo_PQfreemem = binval;
jbe@412 1247 // create Lua string:
jbe/bsw@0 1248 lua_pushlstring(L, binval, binlen);
jbe@412 1249 // free memory allocated by PQunescapeBytea:
jbe/bsw@0 1250 PQfreemem(binval);
jbe@412 1251 // avoid double call of PQfreemem later:
jbe@412 1252 conn->todo_PQfreemem = NULL;
jbe/bsw@0 1253 } else {
jbe/bsw@0 1254 lua_pushstring(L, PQgetvalue(res, 0, col));
jbe/bsw@0 1255 }
jbe/bsw@0 1256 lua_rawseti(L, 5, col+1);
jbe/bsw@0 1257 }
jbe/bsw@0 1258 } else {
jbe/bsw@0 1259 // no row in optrow mode
jbe/bsw@0 1260 lua_pop(L, 1);
jbe/bsw@0 1261 lua_pushnil(L);
jbe/bsw@0 1262 }
jbe@23 1263 // save result in result list:
jbe/bsw@0 1264 lua_rawseti(L, 4, command_idx+1);
jbe@23 1265 // extra assertion:
jbe/bsw@0 1266 if (lua_gettop(L) != 4) abort(); // should not happen
jbe@23 1267 // free memory acquired by libpq:
jbe/bsw@0 1268 PQclear(res);
jbe@408 1269 // avoid double call of PQclear later:
jbe@408 1270 conn->todo_PQclear = NULL;
jbe/bsw@0 1271 }
jbe/bsw@0 1272 // trace callback at stack position 3
jbe/bsw@0 1273 // result at stack position 4 (top of stack)
jbe@23 1274 // if a trace callback is existent, then call:
jbe/bsw@0 1275 if (lua_toboolean(L, 3)) {
jbe/bsw@0 1276 lua_pushvalue(L, 3);
jbe/bsw@0 1277 lua_call(L, 0, 0);
jbe/bsw@0 1278 }
jbe@23 1279 // put result at stack position 3:
jbe@23 1280 lua_replace(L, 3);
jbe@23 1281 // get output converter to stack position 4:
jbe@23 1282 lua_getfield(L, 1, "output_converter");
jbe@374 1283 // get mutability state saver to stack position 5:
jbe@375 1284 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe@375 1285 lua_getfield(L, -1, "save_mutability_state");
jbe@375 1286 lua_replace(L, -2);
jbe@23 1287 // apply output converters and fill "_data" table according to column names:
jbe/bsw@0 1288 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1289 int mode;
jbe/bsw@0 1290 mode = modes[command_idx];
jbe@374 1291 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
jbe@374 1292 if (lua_toboolean(L, 6)) {
jbe@374 1293 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
jbe@374 1294 cols = lua_rawlen(L, 7);
jbe/bsw@0 1295 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
jbe@374 1296 rows = lua_rawlen(L, 6);
jbe/bsw@0 1297 for (row = 0; row < rows; row++) {
jbe@374 1298 lua_rawgeti(L, 6, row+1); // row at stack position 8
jbe@374 1299 lua_getfield(L, 8, "_data"); // _data table at stack position 9
jbe@375 1300 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
jbe/bsw@0 1301 for (col = 0; col < cols; col++) {
jbe@375 1302 lua_rawgeti(L, 7, col+1); // this column info at position 11
jbe@375 1303 lua_getfield(L, 11, "field_name"); // 12
jbe/bsw@0 1304 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1305 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1306 lua_pushvalue(L, 1); // connection
jbe@374 1307 lua_rawgeti(L, 8, col+1); // raw-value
jbe@375 1308 lua_pushvalue(L, 11); // this column info
jbe@375 1309 lua_call(L, 3, 1); // converted value at position 13
jbe/bsw@0 1310 } else {
jbe@375 1311 lua_rawgeti(L, 8, col+1); // raw-value at position 13
jbe/bsw@0 1312 }
jbe@375 1313 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1314 lua_pushvalue(L, 12); // copy of field name
jbe@375 1315 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1316 lua_pushvalue(L, 13); // copy of value
jbe@375 1317 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1318 lua_rawset(L, 10); // store mutability state in _dirty table
jbe@375 1319 }
jbe@375 1320 lua_pushvalue(L, 13); // 14
jbe@374 1321 lua_rawseti(L, 8, col+1);
jbe@374 1322 lua_rawset(L, 9);
jbe@399 1323 lua_settop(L, 10);
jbe/bsw@0 1324 }
jbe@374 1325 lua_settop(L, 7);
jbe/bsw@0 1326 }
jbe/bsw@0 1327 } else {
jbe@374 1328 lua_getfield(L, 6, "_data"); // _data table at stack position 8
jbe@375 1329 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
jbe/bsw@0 1330 for (col = 0; col < cols; col++) {
jbe@375 1331 lua_rawgeti(L, 7, col+1); // this column info at position 10
jbe@375 1332 lua_getfield(L, 10, "field_name"); // 11
jbe/bsw@0 1333 if (lua_toboolean(L, 4)) {
jbe/bsw@0 1334 lua_pushvalue(L, 4); // output-converter
jbe/bsw@0 1335 lua_pushvalue(L, 1); // connection
jbe@374 1336 lua_rawgeti(L, 6, col+1); // raw-value
jbe@375 1337 lua_pushvalue(L, 10); // this column info
jbe@375 1338 lua_call(L, 3, 1); // converted value at position 12
jbe/bsw@0 1339 } else {
jbe@375 1340 lua_rawgeti(L, 6, col+1); // raw-value at position 12
jbe/bsw@0 1341 }
jbe@375 1342 if (lua_toboolean(L, 5)) { // handle mutable values?
jbe@375 1343 lua_pushvalue(L, 11); // copy of field name
jbe@375 1344 lua_pushvalue(L, 5); // mutability state saver function
jbe@375 1345 lua_pushvalue(L, 12); // copy of value
jbe@375 1346 lua_call(L, 1, 1); // calculated mutability state of value
jbe@375 1347 lua_rawset(L, 9); // store mutability state in _dirty table
jbe@375 1348 }
jbe@375 1349 lua_pushvalue(L, 12); // 13
jbe@374 1350 lua_rawseti(L, 6, col+1);
jbe@374 1351 lua_rawset(L, 8);
jbe@399 1352 lua_settop(L, 9);
jbe/bsw@0 1353 }
jbe/bsw@0 1354 }
jbe/bsw@0 1355 }
jbe@374 1356 lua_settop(L, 5);
jbe/bsw@0 1357 }
jbe@23 1358 // return nil as first result value, followed by result lists/objects:
jbe/bsw@0 1359 lua_settop(L, 3);
jbe/bsw@0 1360 lua_pushnil(L);
jbe/bsw@0 1361 for (command_idx = 0; command_idx < command_count; command_idx++) {
jbe/bsw@0 1362 lua_rawgeti(L, 3, command_idx+1);
jbe/bsw@0 1363 }
jbe/bsw@0 1364 return command_count+1;
jbe/bsw@0 1365 }
jbe/bsw@0 1366
jbe@397 1367 // method "is_kind_of" of error objects:
jbe@397 1368 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
jbe@397 1369 const char *errclass;
jbe@397 1370 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1371 errclass = luaL_checkstring(L, 2);
jbe@397 1372 lua_settop(L, 2);
jbe@397 1373 lua_getfield(L, 1, "code"); // 3
jbe@397 1374 luaL_argcheck(L,
jbe@397 1375 lua_type(L, 3) == LUA_TSTRING,
jbe@397 1376 1,
jbe@397 1377 "field 'code' of error object is not a string"
jbe@397 1378 );
jbe@397 1379 lua_pushboolean(L,
jbe@397 1380 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
jbe@397 1381 );
jbe@397 1382 return 1;
jbe@397 1383 }
jbe@397 1384
jbe@397 1385 // method "wait" of database handles:
jbe@397 1386 static int mondelefant_conn_wait(lua_State *L) {
jbe@397 1387 int argc;
jbe@397 1388 // count number of arguments:
jbe@397 1389 argc = lua_gettop(L);
jbe@397 1390 // insert "try_wait" function/method at stack position 1:
jbe@397 1391 lua_pushcfunction(L, mondelefant_conn_try_wait);
jbe@397 1392 lua_insert(L, 1);
jbe@397 1393 // call "try_wait" method:
jbe@397 1394 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@397 1395 // check, if error occurred:
jbe@397 1396 if (lua_toboolean(L, 1)) {
jbe@397 1397 // raise error
jbe/bsw@0 1398 lua_settop(L, 1);
jbe/bsw@0 1399 return lua_error(L);
jbe/bsw@0 1400 } else {
jbe@397 1401 // return everything but nil error object:
jbe@397 1402 return lua_gettop(L) - 1;
jbe/bsw@0 1403 }
jbe/bsw@0 1404 }
jbe/bsw@0 1405
jbe@23 1406 // method "query" of database handles:
jbe/bsw@0 1407 static int mondelefant_conn_query(lua_State *L) {
jbe/bsw@0 1408 int argc;
jbe@23 1409 // count number of arguments:
jbe/bsw@0 1410 argc = lua_gettop(L);
jbe@23 1411 // insert "try_query" function/method at stack position 1:
jbe/bsw@0 1412 lua_pushcfunction(L, mondelefant_conn_try_query);
jbe@23 1413 lua_insert(L, 1);
jbe@23 1414 // call "try_query" method:
jbe@23 1415 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
jbe@23 1416 // check, if error occurred:
jbe@23 1417 if (lua_toboolean(L, 1)) {
jbe@397 1418 // raise error
jbe@397 1419 lua_settop(L, 1);
jbe@397 1420 return lua_error(L);
jbe/bsw@0 1421 } else {
jbe@23 1422 // return everything but nil error object:
jbe@23 1423 return lua_gettop(L) - 1;
jbe/bsw@0 1424 }
jbe/bsw@0 1425 }
jbe/bsw@0 1426
jbe@23 1427 // library function "set_class":
jbe/bsw@0 1428 static int mondelefant_set_class(lua_State *L) {
jbe@23 1429 // ensure that first argument is a database result list/object:
jbe/bsw@0 1430 lua_settop(L, 2);
jbe/bsw@0 1431 lua_getmetatable(L, 1); // 3
jbe/bsw@0 1432 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
jbe@64 1433 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
jbe@23 1434 // ensure that second argument is a database class (model):
jbe/bsw@0 1435 lua_settop(L, 2);
jbe/bsw@0 1436 lua_getmetatable(L, 2); // 3
jbe/bsw@0 1437 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
jbe@64 1438 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
jbe@23 1439 // set attribute "_class" of result list/object to given class:
jbe/bsw@0 1440 lua_settop(L, 2);
jbe/bsw@0 1441 lua_pushvalue(L, 2); // 3
jbe/bsw@0 1442 lua_setfield(L, 1, "_class");
jbe@23 1443 // test, if database result is a list (and not a single object):
jbe/bsw@0 1444 lua_getfield(L, 1, "_type"); // 3
jbe/bsw@0 1445 lua_pushliteral(L, "list"); // 4
jbe/bsw@0 1446 if (lua_rawequal(L, 3, 4)) {
jbe/bsw@0 1447 int i;
jbe@23 1448 // set attribute "_class" of all elements to given class:
jbe@64 1449 for (i=0; i < lua_rawlen(L, 1); i++) {
jbe/bsw@0 1450 lua_settop(L, 2);
jbe/bsw@0 1451 lua_rawgeti(L, 1, i+1); // 3
jbe/bsw@0 1452 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1453 lua_setfield(L, 3, "_class");
jbe/bsw@0 1454 }
jbe/bsw@0 1455 }
jbe@23 1456 // return first argument:
jbe/bsw@0 1457 lua_settop(L, 1);
jbe/bsw@0 1458 return 1;
jbe/bsw@0 1459 }
jbe/bsw@0 1460
jbe@23 1461 // library function "new_class":
jbe/bsw@0 1462 static int mondelefant_new_class(lua_State *L) {
jbe@397 1463 // if no argument is given, use an empty table:
jbe@397 1464 if (lua_isnoneornil(L, 1)) {
jbe/bsw@0 1465 lua_settop(L, 0);
jbe/bsw@0 1466 lua_newtable(L); // 1
jbe@397 1467 } else {
jbe@397 1468 luaL_checktype(L, 1, LUA_TTABLE);
jbe@397 1469 lua_settop(L, 1);
jbe/bsw@0 1470 }
jbe@23 1471 // set meta-table for database classes (models):
jbe@406 1472 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
jbe@23 1473 // check, if "prototype" attribute is not set:
jbe/bsw@0 1474 lua_pushliteral(L, "prototype"); // 2
jbe/bsw@0 1475 lua_rawget(L, 1); // 2
jbe/bsw@0 1476 if (!lua_toboolean(L, 2)) {
jbe@23 1477 // set "prototype" attribute to default prototype:
jbe/bsw@0 1478 lua_pushliteral(L, "prototype"); // 3
jbe@413 1479 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); // 4
jbe/bsw@0 1480 lua_rawset(L, 1);
jbe/bsw@0 1481 }
jbe@23 1482 // set "object" attribute to empty table, unless it is already set:
jbe/bsw@0 1483 lua_settop(L, 1);
jbe/bsw@0 1484 lua_pushliteral(L, "object"); // 2
jbe/bsw@0 1485 lua_rawget(L, 1); // 2
jbe/bsw@0 1486 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1487 lua_pushliteral(L, "object"); // 3
jbe/bsw@0 1488 lua_newtable(L); // 4
jbe/bsw@0 1489 lua_rawset(L, 1);
jbe/bsw@0 1490 }
jbe@23 1491 // set "object_get" attribute to empty table, unless it is already set:
jbe/bsw@0 1492 lua_settop(L, 1);
jbe/bsw@0 1493 lua_pushliteral(L, "object_get"); // 2
jbe/bsw@0 1494 lua_rawget(L, 1); // 2
jbe/bsw@0 1495 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1496 lua_pushliteral(L, "object_get"); // 3
jbe/bsw@0 1497 lua_newtable(L); // 4
jbe/bsw@0 1498 lua_rawset(L, 1);
jbe/bsw@0 1499 }
jbe@23 1500 // set "object_set" attribute to empty table, unless it is already set:
jbe/bsw@0 1501 lua_settop(L, 1);
jbe/bsw@0 1502 lua_pushliteral(L, "object_set"); // 2
jbe/bsw@0 1503 lua_rawget(L, 1); // 2
jbe/bsw@0 1504 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1505 lua_pushliteral(L, "object_set"); // 3
jbe/bsw@0 1506 lua_newtable(L); // 4
jbe/bsw@0 1507 lua_rawset(L, 1);
jbe/bsw@0 1508 }
jbe@23 1509 // set "list" attribute to empty table, unless it is already set:
jbe/bsw@0 1510 lua_settop(L, 1);
jbe/bsw@0 1511 lua_pushliteral(L, "list"); // 2
jbe/bsw@0 1512 lua_rawget(L, 1); // 2
jbe/bsw@0 1513 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1514 lua_pushliteral(L, "list"); // 3
jbe/bsw@0 1515 lua_newtable(L); // 4
jbe/bsw@0 1516 lua_rawset(L, 1);
jbe/bsw@0 1517 }
jbe@23 1518 // set "references" attribute to empty table, unless it is already set:
jbe/bsw@0 1519 lua_settop(L, 1);
jbe/bsw@0 1520 lua_pushliteral(L, "references"); // 2
jbe/bsw@0 1521 lua_rawget(L, 1); // 2
jbe/bsw@0 1522 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1523 lua_pushliteral(L, "references"); // 3
jbe/bsw@0 1524 lua_newtable(L); // 4
jbe/bsw@0 1525 lua_rawset(L, 1);
jbe/bsw@0 1526 }
jbe@23 1527 // set "foreign_keys" attribute to empty table, unless it is already set:
jbe/bsw@0 1528 lua_settop(L, 1);
jbe/bsw@0 1529 lua_pushliteral(L, "foreign_keys"); // 2
jbe/bsw@0 1530 lua_rawget(L, 1); // 2
jbe/bsw@0 1531 if (!lua_toboolean(L, 2)) {
jbe/bsw@0 1532 lua_pushliteral(L, "foreign_keys"); // 3
jbe/bsw@0 1533 lua_newtable(L); // 4
jbe/bsw@0 1534 lua_rawset(L, 1);
jbe/bsw@0 1535 }
jbe@23 1536 // return table:
jbe/bsw@0 1537 lua_settop(L, 1);
jbe/bsw@0 1538 return 1;
jbe/bsw@0 1539 }
jbe/bsw@0 1540
jbe@23 1541 // method "get_reference" of classes (models):
jbe/bsw@0 1542 static int mondelefant_class_get_reference(lua_State *L) {
jbe/bsw@0 1543 lua_settop(L, 2);
jbe/bsw@0 1544 while (lua_toboolean(L, 1)) {
jbe@23 1545 // get "references" table:
jbe/bsw@0 1546 lua_getfield(L, 1, "references"); // 3
jbe@23 1547 // perform lookup:
jbe/bsw@0 1548 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1549 lua_gettable(L, 3); // 4
jbe@23 1550 // return result, if lookup was successful:
jbe/bsw@0 1551 if (!lua_isnil(L, 4)) return 1;
jbe@23 1552 // replace current table by its prototype:
jbe/bsw@0 1553 lua_settop(L, 2);
jbe/bsw@0 1554 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1555 lua_rawget(L, 1); // 3
jbe/bsw@0 1556 lua_replace(L, 1);
jbe/bsw@0 1557 }
jbe@23 1558 // return nothing:
jbe/bsw@0 1559 return 0;
jbe/bsw@0 1560 }
jbe/bsw@0 1561
jbe@23 1562 // method "iterate_over_references" of classes (models):
jbe/bsw@0 1563 static int mondelefant_class_iterate_over_references(lua_State *L) {
jbe/bsw@0 1564 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
jbe/bsw@0 1565 }
jbe/bsw@0 1566
jbe@23 1567 // method "get_foreign_key_reference_name" of classes (models):
jbe/bsw@0 1568 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
jbe/bsw@0 1569 lua_settop(L, 2);
jbe/bsw@0 1570 while (lua_toboolean(L, 1)) {
jbe@23 1571 // get "foreign_keys" table:
jbe/bsw@0 1572 lua_getfield(L, 1, "foreign_keys"); // 3
jbe@23 1573 // perform lookup:
jbe/bsw@0 1574 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1575 lua_gettable(L, 3); // 4
jbe@23 1576 // return result, if lookup was successful:
jbe/bsw@0 1577 if (!lua_isnil(L, 4)) return 1;
jbe@23 1578 // replace current table by its prototype:
jbe/bsw@0 1579 lua_settop(L, 2);
jbe/bsw@0 1580 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1581 lua_rawget(L, 1); // 3
jbe/bsw@0 1582 lua_replace(L, 1);
jbe/bsw@0 1583 }
jbe@23 1584 // return nothing:
jbe/bsw@0 1585 return 0;
jbe/bsw@0 1586 }
jbe/bsw@0 1587
jbe@23 1588 // meta-method "__index" of database result lists and objects:
jbe/bsw@0 1589 static int mondelefant_result_index(lua_State *L) {
jbe/bsw@0 1590 const char *result_type;
jbe@23 1591 // only lookup, when key is a string not beginning with an underscore:
jbe/bsw@0 1592 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe@23 1593 return 0;
jbe/bsw@0 1594 }
jbe@436 1595 // class on stack position 3:
jbe@23 1596 lua_settop(L, 2);
jbe/bsw@0 1597 lua_getfield(L, 1, "_class"); // 3
jbe@23 1598 // get value of "_type" attribute:
jbe/bsw@0 1599 lua_getfield(L, 1, "_type"); // 4
jbe/bsw@0 1600 result_type = lua_tostring(L, 4);
jbe@23 1601 // different lookup for lists and objects:
jbe@23 1602 if (result_type && !strcmp(result_type, "object")) { // object
jbe/bsw@0 1603 lua_settop(L, 3);
jbe@384 1604 // try inherited attributes, methods or getter functions:
jbe@383 1605 lua_pushvalue(L, 3); // 4
jbe@383 1606 while (lua_toboolean(L, 4)) {
jbe@383 1607 lua_getfield(L, 4, "object"); // 5
jbe@383 1608 lua_pushvalue(L, 2); // 6
jbe@383 1609 lua_gettable(L, 5); // 6
jbe@383 1610 if (!lua_isnil(L, 6)) return 1;
jbe@383 1611 lua_settop(L, 4);
jbe@383 1612 lua_getfield(L, 4, "object_get"); // 5
jbe@383 1613 lua_pushvalue(L, 2); // 6
jbe@383 1614 lua_gettable(L, 5); // 6
jbe@383 1615 if (lua_toboolean(L, 6)) {
jbe@383 1616 lua_pushvalue(L, 1); // 7
jbe@383 1617 lua_call(L, 1, 1); // 6
jbe/bsw@0 1618 return 1;
jbe/bsw@0 1619 }
jbe@383 1620 lua_settop(L, 4);
jbe@383 1621 lua_pushliteral(L, "prototype"); // 5
jbe@383 1622 lua_rawget(L, 4); // 5
jbe@383 1623 lua_replace(L, 4);
jbe/bsw@0 1624 }
jbe@383 1625 lua_settop(L, 3);
jbe/bsw@0 1626 // try primary keys of referenced objects:
jbe/bsw@0 1627 lua_pushcfunction(L,
jbe/bsw@0 1628 mondelefant_class_get_foreign_key_reference_name
jbe@383 1629 ); // 4
jbe@383 1630 lua_pushvalue(L, 3); // 5
jbe@383 1631 lua_pushvalue(L, 2); // 6
jbe@383 1632 lua_call(L, 2, 1); // 4
jbe@383 1633 if (!lua_isnil(L, 4)) {
jbe@383 1634 // reference name at stack position 4
jbe@383 1635 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@382 1636 lua_pushvalue(L, 3); // 6
jbe@383 1637 lua_pushvalue(L, 4); // 7
jbe@383 1638 lua_call(L, 2, 1); // reference info at stack position 5
jbe@383 1639 lua_getfield(L, 1, "_ref"); // 6
jbe@383 1640 lua_getfield(L, 5, "ref"); // 7
jbe@383 1641 lua_gettable(L, 6); // 7
jbe@383 1642 if (!lua_isnil(L, 7)) {
jbe@383 1643 if (lua_toboolean(L, 7)) {
jbe@383 1644 lua_getfield(L, 5, "that_key"); // 8
jbe@383 1645 if (lua_isnil(L, 8)) {
jbe/bsw@0 1646 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe/bsw@0 1647 }
jbe@383 1648 lua_gettable(L, 7); // 8
jbe/bsw@0 1649 } else {
jbe/bsw@0 1650 lua_pushnil(L);
jbe/bsw@0 1651 }
jbe/bsw@0 1652 return 1;
jbe/bsw@0 1653 }
jbe/bsw@0 1654 }
jbe@383 1655 lua_settop(L, 3);
jbe@383 1656 lua_getfield(L, 1, "_data"); // _data table on stack position 4
jbe/bsw@0 1657 // try cached referenced object (or cached NULL reference):
jbe@383 1658 lua_getfield(L, 1, "_ref"); // 5
jbe@383 1659 lua_pushvalue(L, 2); // 6
jbe@383 1660 lua_gettable(L, 5); // 6
jbe@383 1661 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
jbe/bsw@0 1662 lua_pushnil(L);
jbe/bsw@0 1663 return 1;
jbe@383 1664 } else if (!lua_isnil(L, 6)) {
jbe/bsw@0 1665 return 1;
jbe/bsw@0 1666 }
jbe@383 1667 lua_settop(L, 4);
jbe/bsw@0 1668 // try to load a referenced object:
jbe@383 1669 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@383 1670 lua_pushvalue(L, 3); // 6
jbe@383 1671 lua_pushvalue(L, 2); // 7
jbe@383 1672 lua_call(L, 2, 1); // 5
jbe@383 1673 if (!lua_isnil(L, 5)) {
jbe/bsw@0 1674 lua_settop(L, 2);
jbe/bsw@0 1675 lua_getfield(L, 1, "load"); // 3
jbe/bsw@0 1676 lua_pushvalue(L, 1); // 4 (self)
jbe/bsw@0 1677 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1678 lua_call(L, 2, 0);
jbe/bsw@0 1679 lua_settop(L, 2);
jbe/bsw@0 1680 lua_getfield(L, 1, "_ref"); // 3
jbe/bsw@0 1681 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1682 lua_gettable(L, 3); // 4
jbe/bsw@0 1683 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
jbe/bsw@0 1684 return 1;
jbe/bsw@0 1685 }
jbe@383 1686 lua_settop(L, 4);
jbe@415 1687 // check if proxy access to document in special column is enabled:
jbe@383 1688 lua_getfield(L, 3, "document_column"); // 5
jbe@383 1689 if (lua_toboolean(L, 5)) {
jbe@415 1690 // if yes, then proxy access:
jbe@383 1691 lua_gettable(L, 4); // 5
jbe@383 1692 if (!lua_isnil(L, 5)) {
jbe@383 1693 lua_pushvalue(L, 2); // 6
jbe@383 1694 lua_gettable(L, 5); // 6
jbe@383 1695 }
jbe@415 1696 } else {
jbe@415 1697 // else use _data table:
jbe@415 1698 lua_pushvalue(L, 2); // 6
jbe@415 1699 lua_gettable(L, 4); // 6
jbe@383 1700 }
jbe@415 1701 return 1; // return element at stack position 5 or 6
jbe@23 1702 } else if (result_type && !strcmp(result_type, "list")) { // list
jbe/bsw@0 1703 lua_settop(L, 3);
jbe/bsw@0 1704 // try inherited list attributes or methods:
jbe/bsw@0 1705 while (lua_toboolean(L, 3)) {
jbe/bsw@0 1706 lua_getfield(L, 3, "list"); // 4
jbe/bsw@0 1707 lua_pushvalue(L, 2); // 5
jbe/bsw@0 1708 lua_gettable(L, 4); // 5
jbe/bsw@0 1709 if (!lua_isnil(L, 5)) return 1;
jbe/bsw@0 1710 lua_settop(L, 3);
jbe/bsw@0 1711 lua_pushliteral(L, "prototype"); // 4
jbe/bsw@0 1712 lua_rawget(L, 3); // 4
jbe/bsw@0 1713 lua_replace(L, 3);
jbe/bsw@0 1714 }
jbe/bsw@0 1715 }
jbe@23 1716 // return nothing:
jbe/bsw@0 1717 return 0;
jbe/bsw@0 1718 }
jbe/bsw@0 1719
jbe@23 1720 // meta-method "__newindex" of database result lists and objects:
jbe/bsw@0 1721 static int mondelefant_result_newindex(lua_State *L) {
jbe/bsw@0 1722 const char *result_type;
jbe@23 1723 // perform rawset, unless key is a string not starting with underscore:
jbe/bsw@0 1724 lua_settop(L, 3);
jbe/bsw@0 1725 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
jbe/bsw@0 1726 lua_rawset(L, 1);
jbe/bsw@0 1727 return 1;
jbe/bsw@0 1728 }
jbe@436 1729 // class on stack position 4:
jbe@384 1730 lua_settop(L, 3);
jbe/bsw@0 1731 lua_getfield(L, 1, "_class"); // 4
jbe@23 1732 // get value of "_type" attribute:
jbe/bsw@0 1733 lua_getfield(L, 1, "_type"); // 5
jbe/bsw@0 1734 result_type = lua_tostring(L, 5);
jbe@378 1735 // distinguish between lists and objects:
jbe@378 1736 if (result_type && !strcmp(result_type, "object")) { // objects
jbe@378 1737 lua_settop(L, 4);
jbe@378 1738 // try object setter functions:
jbe@384 1739 lua_pushvalue(L, 4); // 5
jbe@384 1740 while (lua_toboolean(L, 5)) {
jbe@384 1741 lua_getfield(L, 5, "object_set"); // 6
jbe@384 1742 lua_pushvalue(L, 2); // 7
jbe@384 1743 lua_gettable(L, 6); // 7
jbe@384 1744 if (lua_toboolean(L, 7)) {
jbe@384 1745 lua_pushvalue(L, 1); // 8
jbe@384 1746 lua_pushvalue(L, 3); // 9
jbe@378 1747 lua_call(L, 2, 0);
jbe@378 1748 return 0;
jbe@378 1749 }
jbe@384 1750 lua_settop(L, 5);
jbe@384 1751 lua_pushliteral(L, "prototype"); // 6
jbe@384 1752 lua_rawget(L, 5); // 6
jbe@384 1753 lua_replace(L, 5);
jbe@378 1754 }
jbe@384 1755 lua_settop(L, 4);
jbe@384 1756 lua_getfield(L, 1, "_data"); // _data table on stack position 5
jbe/bsw@0 1757 // check, if a object reference is changed:
jbe@384 1758 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
jbe@384 1759 lua_pushvalue(L, 4); // 7
jbe@384 1760 lua_pushvalue(L, 2); // 8
jbe@384 1761 lua_call(L, 2, 1); // 6
jbe@384 1762 if (!lua_isnil(L, 6)) {
jbe/bsw@0 1763 // store object in _ref table (use false for nil): // TODO: use special object instead of false
jbe@384 1764 lua_getfield(L, 1, "_ref"); // 7
jbe@384 1765 lua_pushvalue(L, 2); // 8
jbe@384 1766 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
jbe@384 1767 else lua_pushvalue(L, 3); // 9
jbe@384 1768 lua_settable(L, 7);
jbe@384 1769 lua_settop(L, 6);
jbe/bsw@0 1770 // delete referencing key from _data table:
jbe@384 1771 lua_getfield(L, 6, "this_key"); // 7
jbe@384 1772 if (lua_isnil(L, 7)) {
jbe/bsw@0 1773 return luaL_error(L, "Missing 'this_key' entry in model reference.");
jbe/bsw@0 1774 }
jbe@384 1775 lua_pushvalue(L, 7); // 8
jbe@384 1776 lua_pushnil(L); // 9
jbe@384 1777 lua_settable(L, 5);
jbe@384 1778 lua_getfield(L, 1, "_dirty"); // 8
jbe@384 1779 lua_pushvalue(L, 7); // 9
jbe@384 1780 lua_pushboolean(L, 1); // 10
jbe@384 1781 lua_settable(L, 8);
jbe@384 1782 return 0;
jbe@384 1783 }
jbe@384 1784 lua_settop(L, 5);
jbe@384 1785 // check proxy access to document in special column:
jbe@384 1786 lua_getfield(L, 4, "document_column"); // 6
jbe@384 1787 if (lua_toboolean(L, 6)) {
jbe@414 1788 lua_gettable(L, 5); // 6
jbe@414 1789 if (lua_isnil(L, 6)) {
jbe@414 1790 return luaL_error(L, "Cannot write to document column: document is nil");
jbe@384 1791 }
jbe@414 1792 lua_pushvalue(L, 2); // 7
jbe@414 1793 lua_pushvalue(L, 3); // 8
jbe@414 1794 lua_settable(L, 6);
jbe@414 1795 return 0;
jbe@384 1796 }
jbe@384 1797 lua_settop(L, 5);
jbe@384 1798 // store value in data field info:
jbe@384 1799 lua_pushvalue(L, 2); // 6
jbe@384 1800 lua_pushvalue(L, 3); // 7
jbe@384 1801 lua_settable(L, 5);
jbe@384 1802 lua_settop(L, 4);
jbe@384 1803 // mark field as dirty (needs to be UPDATEd on save):
jbe@384 1804 lua_getfield(L, 1, "_dirty"); // 5
jbe@384 1805 lua_pushvalue(L, 2); // 6
jbe@384 1806 lua_pushboolean(L, 1); // 7
jbe@384 1807 lua_settable(L, 5);
jbe@384 1808 lua_settop(L, 4);
jbe@384 1809 // reset reference cache, if neccessary:
jbe@384 1810 lua_pushcfunction(L,
jbe@384 1811 mondelefant_class_get_foreign_key_reference_name
jbe@384 1812 ); // 5
jbe@384 1813 lua_pushvalue(L, 4); // 6
jbe@384 1814 lua_pushvalue(L, 2); // 7
jbe@384 1815 lua_call(L, 2, 1); // 5
jbe@384 1816 if (!lua_isnil(L, 5)) {
jbe@384 1817 lua_getfield(L, 1, "_ref"); // 6
jbe@382 1818 lua_pushvalue(L, 5); // 7
jbe@382 1819 lua_pushnil(L); // 8
jbe@382 1820 lua_settable(L, 6);
jbe/bsw@0 1821 }
jbe/bsw@0 1822 return 0;
jbe@23 1823 } else { // non-objects (i.e. lists)
jbe@23 1824 // perform rawset:
jbe/bsw@0 1825 lua_settop(L, 3);
jbe/bsw@0 1826 lua_rawset(L, 1);
jbe/bsw@0 1827 return 0;
jbe/bsw@0 1828 }
jbe/bsw@0 1829 }
jbe/bsw@0 1830
jbe@416 1831 // meta-method "__index" of column proxy:
jbe@416 1832 static int mondelefant_columns_index(lua_State *L) {
jbe@416 1833 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1834 lua_settop(L, 2);
jbe@416 1835 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 3
jbe@436 1836 // try primary keys of referenced objects:
jbe@436 1837 lua_pushcfunction(L,
jbe@436 1838 mondelefant_class_get_foreign_key_reference_name
jbe@436 1839 ); // 4
jbe@436 1840 lua_getfield(L, 3, "_class"); // 5
jbe@436 1841 lua_pushvalue(L, 2); // 6
jbe@436 1842 lua_call(L, 2, 1); // 4
jbe@436 1843 if (!lua_isnil(L, 4)) {
jbe@436 1844 // reference name at stack position 4
jbe@436 1845 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
jbe@436 1846 lua_getfield(L, 3, "_class"); // 6
jbe@436 1847 lua_pushvalue(L, 4); // 7
jbe@436 1848 lua_call(L, 2, 1); // reference info at stack position 5
jbe@436 1849 lua_getfield(L, 3, "_ref"); // 6
jbe@436 1850 lua_getfield(L, 5, "ref"); // 7
jbe@436 1851 lua_gettable(L, 6); // 7
jbe@436 1852 if (!lua_isnil(L, 7)) {
jbe@436 1853 if (lua_toboolean(L, 7)) {
jbe@436 1854 lua_getfield(L, 5, "that_key"); // 8
jbe@436 1855 if (lua_isnil(L, 8)) {
jbe@436 1856 return luaL_error(L, "Missing 'that_key' entry in model reference.");
jbe@436 1857 }
jbe@436 1858 lua_gettable(L, 7); // 8
jbe@436 1859 } else {
jbe@436 1860 lua_pushnil(L);
jbe@436 1861 }
jbe@436 1862 return 1;
jbe@436 1863 }
jbe@436 1864 }
jbe@436 1865 lua_settop(L, 3);
jbe@436 1866 // if not successful, use _data table:
jbe@416 1867 lua_getfield(L, 3, "_data"); // 4
jbe@416 1868 lua_pushvalue(L, 2); // 5
jbe@416 1869 lua_gettable(L, 4); // 5
jbe@416 1870 return 1;
jbe@416 1871 }
jbe@416 1872
jbe@416 1873 // meta-method "__newindex" of column proxy:
jbe@416 1874 static int mondelefant_columns_newindex(lua_State *L) {
jbe@416 1875 luaL_checktype(L, 1, LUA_TTABLE);
jbe@416 1876 lua_settop(L, 3);
jbe@416 1877 lua_rawgetp(L, 1, MONDELEFANT_COLUMNS_RESULT_LUKEY); // 4
jbe@436 1878 // reset reference cache, if neccessary:
jbe@436 1879 lua_pushcfunction(L,
jbe@436 1880 mondelefant_class_get_foreign_key_reference_name
jbe@436 1881 ); // 5
jbe@436 1882 lua_getfield(L, 4, "_class"); // 6
jbe@436 1883 lua_pushvalue(L, 2); // 7
jbe@436 1884 lua_call(L, 2, 1); // 5
jbe@436 1885 if (!lua_isnil(L, 5)) {
jbe@436 1886 lua_getfield(L, 4, "_ref"); // 6
jbe@436 1887 lua_pushvalue(L, 5); // 7
jbe@436 1888 lua_pushnil(L); // 8
jbe@436 1889 lua_settable(L, 6);
jbe@436 1890 }
jbe@436 1891 lua_settop(L, 4);
jbe@436 1892 // set _data and _dirty:
jbe@416 1893 lua_getfield(L, 4, "_data"); // 5
jbe@416 1894 lua_getfield(L, 4, "_dirty"); // 6
jbe@416 1895 lua_pushvalue(L, 2);
jbe@416 1896 lua_pushvalue(L, 3);
jbe@416 1897 lua_settable(L, 5);
jbe@416 1898 lua_pushvalue(L, 2);
jbe@416 1899 lua_pushboolean(L, 1);
jbe@416 1900 lua_settable(L, 6);
jbe@416 1901 return 0;
jbe@416 1902 }
jbe@416 1903
jbe@23 1904 // meta-method "__index" of classes (models):
jbe/bsw@0 1905 static int mondelefant_class_index(lua_State *L) {
jbe@23 1906 // perform lookup in prototype:
jbe/bsw@0 1907 lua_settop(L, 2);
jbe/bsw@0 1908 lua_pushliteral(L, "prototype"); // 3
jbe/bsw@0 1909 lua_rawget(L, 1); // 3
jbe/bsw@0 1910 lua_pushvalue(L, 2); // 4
jbe/bsw@0 1911 lua_gettable(L, 3); // 4
jbe/bsw@0 1912 return 1;
jbe/bsw@0 1913 }
jbe/bsw@0 1914
jbe@23 1915 // registration information for functions of library:
jbe/bsw@0 1916 static const struct luaL_Reg mondelefant_module_functions[] = {
jbe/bsw@0 1917 {"connect", mondelefant_connect},
jbe/bsw@0 1918 {"set_class", mondelefant_set_class},
jbe/bsw@0 1919 {"new_class", mondelefant_new_class},
jbe/bsw@0 1920 {NULL, NULL}
jbe/bsw@0 1921 };
jbe/bsw@0 1922
jbe@23 1923 // registration information for meta-methods of database connections:
jbe/bsw@0 1924 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
jbe/bsw@0 1925 {"__gc", mondelefant_conn_free},
jbe/bsw@0 1926 {"__index", mondelefant_conn_index},
jbe/bsw@0 1927 {"__newindex", mondelefant_conn_newindex},
jbe/bsw@0 1928 {NULL, NULL}
jbe/bsw@0 1929 };
jbe/bsw@0 1930
jbe@23 1931 // registration information for methods of database connections:
jbe/bsw@0 1932 static const struct luaL_Reg mondelefant_conn_methods[] = {
jbe/bsw@0 1933 {"close", mondelefant_conn_close},
jbe/bsw@0 1934 {"is_ok", mondelefant_conn_is_ok},
jbe/bsw@0 1935 {"get_transaction_status", mondelefant_conn_get_transaction_status},
jbe@397 1936 {"try_wait", mondelefant_conn_try_wait},
jbe@393 1937 {"wait", mondelefant_conn_wait},
jbe/bsw@0 1938 {"create_list", mondelefant_conn_create_list},
jbe/bsw@0 1939 {"create_object", mondelefant_conn_create_object},
jbe/bsw@0 1940 {"quote_string", mondelefant_conn_quote_string},
jbe/bsw@0 1941 {"quote_binary", mondelefant_conn_quote_binary},
jbe/bsw@0 1942 {"assemble_command", mondelefant_conn_assemble_command},
jbe/bsw@0 1943 {"try_query", mondelefant_conn_try_query},
jbe/bsw@0 1944 {"query", mondelefant_conn_query},
jbe/bsw@0 1945 {NULL, NULL}
jbe/bsw@0 1946 };
jbe/bsw@0 1947
jbe@23 1948 // registration information for meta-methods of error objects:
jbe/bsw@0 1949 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
jbe/bsw@0 1950 {NULL, NULL}
jbe/bsw@0 1951 };
jbe/bsw@0 1952
jbe@23 1953 // registration information for methods of error objects:
jbe/bsw@0 1954 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
jbe@397 1955 {"escalate", lua_error},
jbe/bsw@0 1956 {"is_kind_of", mondelefant_errorobject_is_kind_of},
jbe/bsw@0 1957 {NULL, NULL}
jbe/bsw@0 1958 };
jbe/bsw@0 1959
jbe@23 1960 // registration information for meta-methods of database result lists/objects:
jbe/bsw@0 1961 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
jbe/bsw@0 1962 {"__index", mondelefant_result_index},
jbe/bsw@0 1963 {"__newindex", mondelefant_result_newindex},
jbe/bsw@0 1964 {NULL, NULL}
jbe/bsw@0 1965 };
jbe/bsw@0 1966
jbe@416 1967 // registration information for meta-methods of classes (models):
jbe/bsw@0 1968 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
jbe/bsw@0 1969 {"__index", mondelefant_class_index},
jbe/bsw@0 1970 {NULL, NULL}
jbe/bsw@0 1971 };
jbe/bsw@0 1972
jbe@23 1973 // registration information for methods of classes (models):
jbe/bsw@0 1974 static const struct luaL_Reg mondelefant_class_methods[] = {
jbe/bsw@0 1975 {"get_reference", mondelefant_class_get_reference},
jbe/bsw@0 1976 {"iterate_over_references", mondelefant_class_iterate_over_references},
jbe/bsw@0 1977 {"get_foreign_key_reference_name",
jbe/bsw@0 1978 mondelefant_class_get_foreign_key_reference_name},
jbe/bsw@0 1979 {NULL, NULL}
jbe/bsw@0 1980 };
jbe/bsw@0 1981
jbe@23 1982 // registration information for methods of database result objects (not lists!):
jbe/bsw@0 1983 static const struct luaL_Reg mondelefant_object_methods[] = {
jbe/bsw@0 1984 {NULL, NULL}
jbe/bsw@0 1985 };
jbe/bsw@0 1986
jbe@23 1987 // registration information for methods of database result lists (not single objects!):
jbe/bsw@0 1988 static const struct luaL_Reg mondelefant_list_methods[] = {
jbe/bsw@0 1989 {NULL, NULL}
jbe/bsw@0 1990 };
jbe/bsw@0 1991
jbe@416 1992 // registration information for meta-methods of column proxy:
jbe@416 1993 static const struct luaL_Reg mondelefant_columns_mt_functions[] = {
jbe@416 1994 {"__index", mondelefant_columns_index},
jbe@416 1995 {"__newindex", mondelefant_columns_newindex},
jbe@416 1996 {NULL, NULL}
jbe@416 1997 };
jbe@416 1998
jbe@23 1999 // luaopen function to initialize/register library:
jbe/bsw@0 2000 int luaopen_mondelefant_native(lua_State *L) {
jbe/bsw@0 2001 lua_settop(L, 0);
jbe@416 2002
jbe@416 2003 lua_newtable(L); // meta-table for columns proxy
jbe@416 2004 luaL_setfuncs(L, mondelefant_columns_mt_functions, 0);
jbe@416 2005 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_COLUMNS_MT_REGKEY);
jbe@416 2006
jbe/bsw@0 2007 lua_newtable(L); // module at stack position 1
jbe@64 2008 luaL_setfuncs(L, mondelefant_module_functions, 0);
jbe/bsw@0 2009
jbe/bsw@0 2010 lua_pushvalue(L, 1); // 2
jbe/bsw@0 2011 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
jbe/bsw@0 2012
jbe/bsw@0 2013 lua_newtable(L); // 2
jbe/bsw@0 2014 // NOTE: only PostgreSQL is supported yet:
jbe@64 2015 luaL_setfuncs(L, mondelefant_conn_methods, 0);
jbe/bsw@0 2016 lua_setfield(L, 1, "postgresql_connection_prototype");
jbe/bsw@0 2017 lua_newtable(L); // 2
jbe/bsw@0 2018 lua_setfield(L, 1, "connection_prototype");
jbe/bsw@0 2019
jbe/bsw@0 2020 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
jbe@64 2021 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
jbe/bsw@0 2022 lua_settop(L, 1);
jbe/bsw@0 2023 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
jbe@64 2024 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
jbe/bsw@0 2025 lua_setfield(L, 1, "result_metatable");
jbe/bsw@0 2026 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
jbe@64 2027 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
jbe/bsw@0 2028 lua_setfield(L, 1, "class_metatable");
jbe/bsw@0 2029
jbe/bsw@0 2030 lua_newtable(L); // 2
jbe@272 2031 luaL_setfuncs(L, mondelefant_class_methods, 0);
jbe/bsw@0 2032 lua_newtable(L); // 3
jbe@64 2033 luaL_setfuncs(L, mondelefant_object_methods, 0);
jbe/bsw@0 2034 lua_setfield(L, 2, "object");
jbe/bsw@0 2035 lua_newtable(L); // 3
jbe/bsw@0 2036 lua_setfield(L, 2, "object_get");
jbe/bsw@0 2037 lua_newtable(L); // 3
jbe/bsw@0 2038 lua_setfield(L, 2, "object_set");
jbe/bsw@0 2039 lua_newtable(L); // 3
jbe@64 2040 luaL_setfuncs(L, mondelefant_list_methods, 0);
jbe/bsw@0 2041 lua_setfield(L, 2, "list");
jbe/bsw@0 2042 lua_newtable(L); // 3
jbe/bsw@0 2043 lua_setfield(L, 2, "references");
jbe/bsw@0 2044 lua_newtable(L); // 3
jbe/bsw@0 2045 lua_setfield(L, 2, "foreign_keys");
jbe/bsw@0 2046 lua_pushvalue(L, 2); // 3
jbe/bsw@0 2047 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
jbe/bsw@0 2048 lua_setfield(L, 1, "class_prototype");
jbe/bsw@0 2049
jbe/bsw@0 2050 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
jbe@64 2051 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
jbe/bsw@0 2052 lua_newtable(L); // 3
jbe@64 2053 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
jbe/bsw@0 2054 lua_setfield(L, 2, "__index");
jbe/bsw@0 2055 lua_setfield(L, 1, "errorobject_metatable");
jbe/bsw@0 2056
jbe/bsw@0 2057 return 1;
jbe/bsw@0 2058 }

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