webmcp
annotate libraries/mondelefant/mondelefant_native.c @ 66:afed1ab1477f
Bugfix regarding compatibility with Lua 5.2:
#if instead of #ifdef in webmcp_accelerator.c
#if instead of #ifdef in webmcp_accelerator.c
author | jbe |
---|---|
date | Tue Apr 17 15:38:05 2012 +0200 (2012-04-17) |
parents | 3d43a5cf17c1 |
children | 8d7665e0d490 |
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/bsw@0 | 7 |
jbe@23 | 8 // NOTE: Comments with format "// <number>" denote the Lua stack position |
jbe@23 | 9 |
jbe@23 | 10 // prefix for all Lua registry entries of this library: |
jbe@23 | 11 #define MONDELEFANT_REGKEY "e449ba8d9a53d353_mondelefant_" |
jbe/bsw@0 | 12 |
jbe@23 | 13 // registry key of module "mondelefant_native": |
jbe@23 | 14 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module") |
jbe@23 | 15 // registry key of meta-table for database connections: |
jbe@23 | 16 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection") |
jbe@23 | 17 // registry key of table storing connection specific data: |
jbe@23 | 18 #define MONDELEFANT_CONN_DATA_REGKEY (MONDELEFANT_REGKEY "connection_data") |
jbe@23 | 19 // registry key of meta-table for database result lists and objects: |
jbe@23 | 20 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result") |
jbe@23 | 21 // registry key of meta-table for database error objects: |
jbe@23 | 22 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject") |
jbe@23 | 23 // registry key of meta-table for models (named classes here): |
jbe@23 | 24 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class") |
jbe@23 | 25 // registry key of default prototype for models/classes: |
jbe@23 | 26 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto") |
jbe/bsw@0 | 27 |
jbe@23 | 28 // C-structure for database connection userdata: |
jbe/bsw@0 | 29 typedef struct { |
jbe/bsw@0 | 30 PGconn *pgconn; |
jbe/bsw@0 | 31 int server_encoding; |
jbe/bsw@0 | 32 } mondelefant_conn_t; |
jbe@23 | 33 #define MONDELEFANT_SERVER_ENCODING_ASCII 0 |
jbe@23 | 34 #define MONDELEFANT_SERVER_ENCODING_UTF8 1 |
jbe/bsw@0 | 35 |
jbe@23 | 36 // transform codepoint-position to byte-position for a given UTF-8 string: |
jbe/bsw@0 | 37 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) { |
jbe/bsw@0 | 38 size_t bytepos; |
jbe/bsw@0 | 39 for (bytepos = 0; utf8pos > 0; bytepos++) { |
jbe/bsw@0 | 40 uint8_t c; |
jbe/bsw@0 | 41 c = ((const uint8_t *)str)[bytepos]; |
jbe/bsw@0 | 42 if (!c) break; |
jbe/bsw@0 | 43 if (c <= 0x7f || c >= 0xc0) utf8pos--; |
jbe/bsw@0 | 44 } |
jbe/bsw@0 | 45 return bytepos; |
jbe/bsw@0 | 46 } |
jbe/bsw@0 | 47 |
jbe@23 | 48 // PostgreSQL's OID for binary data type (bytea): |
jbe/bsw@0 | 49 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17) |
jbe/bsw@0 | 50 |
jbe@23 | 51 // mapping a PostgreSQL type given by its OID to a string identifier: |
jbe/bsw@0 | 52 static const char *mondelefant_oid_to_typestr(Oid oid) { |
jbe/bsw@0 | 53 switch (oid) { |
jbe/bsw@0 | 54 case 16: return "bool"; |
jbe/bsw@0 | 55 case 17: return "bytea"; |
jbe/bsw@0 | 56 case 18: return "char"; |
jbe/bsw@0 | 57 case 19: return "name"; |
jbe/bsw@0 | 58 case 20: return "int8"; |
jbe/bsw@0 | 59 case 21: return "int2"; |
jbe/bsw@0 | 60 case 23: return "int4"; |
jbe/bsw@0 | 61 case 25: return "text"; |
jbe/bsw@0 | 62 case 26: return "oid"; |
jbe/bsw@0 | 63 case 27: return "tid"; |
jbe/bsw@0 | 64 case 28: return "xid"; |
jbe/bsw@0 | 65 case 29: return "cid"; |
jbe/bsw@0 | 66 case 600: return "point"; |
jbe/bsw@0 | 67 case 601: return "lseg"; |
jbe/bsw@0 | 68 case 602: return "path"; |
jbe/bsw@0 | 69 case 603: return "box"; |
jbe/bsw@0 | 70 case 604: return "polygon"; |
jbe/bsw@0 | 71 case 628: return "line"; |
jbe/bsw@0 | 72 case 700: return "float4"; |
jbe/bsw@0 | 73 case 701: return "float8"; |
jbe/bsw@0 | 74 case 705: return "unknown"; |
jbe/bsw@0 | 75 case 718: return "circle"; |
jbe/bsw@0 | 76 case 790: return "money"; |
jbe/bsw@0 | 77 case 829: return "macaddr"; |
jbe/bsw@0 | 78 case 869: return "inet"; |
jbe/bsw@0 | 79 case 650: return "cidr"; |
jbe/bsw@0 | 80 case 1042: return "bpchar"; |
jbe/bsw@0 | 81 case 1043: return "varchar"; |
jbe/bsw@0 | 82 case 1082: return "date"; |
jbe/bsw@0 | 83 case 1083: return "time"; |
jbe/bsw@0 | 84 case 1114: return "timestamp"; |
jbe/bsw@0 | 85 case 1184: return "timestamptz"; |
jbe/bsw@0 | 86 case 1186: return "interval"; |
jbe/bsw@0 | 87 case 1266: return "timetz"; |
jbe/bsw@0 | 88 case 1560: return "bit"; |
jbe/bsw@0 | 89 case 1562: return "varbit"; |
jbe/bsw@0 | 90 case 1700: return "numeric"; |
jbe/bsw@0 | 91 default: return NULL; |
jbe/bsw@0 | 92 } |
jbe/bsw@0 | 93 } |
jbe/bsw@0 | 94 |
jbe@23 | 95 // This library maps PostgreSQL's error codes to CamelCase string |
jbe@23 | 96 // identifiers, which consist of CamelCase identifiers and are seperated |
jbe@23 | 97 // by dots (".") (no leading or trailing dots). |
jbe@23 | 98 // There are additional error identifiers which do not have a corresponding |
jbe@23 | 99 // PostgreSQL error associated with it. |
jbe@23 | 100 |
jbe@23 | 101 // matching start of local variable 'pgcode' against string 'incode', |
jbe@23 | 102 // returning string 'outcode' on match: |
jbe/bsw@0 | 103 #define mondelefant_errcode_item(incode, outcode) \ |
jbe/bsw@0 | 104 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else |
jbe/bsw@0 | 105 |
jbe@23 | 106 // additional error identifiers without corresponding PostgreSQL error: |
jbe/bsw@0 | 107 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown" |
jbe/bsw@0 | 108 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException" |
jbe/bsw@0 | 109 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing" |
jbe/bsw@0 | 110 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults" |
jbe/bsw@0 | 111 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected" |
jbe/bsw@0 | 112 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected" |
jbe/bsw@0 | 113 |
jbe@23 | 114 // mapping PostgreSQL error code to error code as returned by this library: |
jbe/bsw@0 | 115 static const char *mondelefant_translate_errcode(const char *pgcode) { |
jbe/bsw@0 | 116 if (!pgcode) abort(); // should not happen |
jbe/bsw@0 | 117 mondelefant_errcode_item("02", "NoData") |
jbe/bsw@0 | 118 mondelefant_errcode_item("03", "SqlStatementNotYetComplete") |
jbe/bsw@0 | 119 mondelefant_errcode_item("08", "ConnectionException") |
jbe/bsw@0 | 120 mondelefant_errcode_item("09", "TriggeredActionException") |
jbe/bsw@0 | 121 mondelefant_errcode_item("0A", "FeatureNotSupported") |
jbe/bsw@0 | 122 mondelefant_errcode_item("0B", "InvalidTransactionInitiation") |
jbe/bsw@0 | 123 mondelefant_errcode_item("0F", "LocatorException") |
jbe/bsw@0 | 124 mondelefant_errcode_item("0L", "InvalidGrantor") |
jbe/bsw@0 | 125 mondelefant_errcode_item("0P", "InvalidRoleSpecification") |
jbe/bsw@0 | 126 mondelefant_errcode_item("21", "CardinalityViolation") |
jbe/bsw@0 | 127 mondelefant_errcode_item("22", "DataException") |
jbe/bsw@0 | 128 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation") |
jbe/bsw@0 | 129 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation") |
jbe/bsw@0 | 130 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation") |
jbe/bsw@0 | 131 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation") |
jbe/bsw@0 | 132 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation") |
jbe/bsw@0 | 133 mondelefant_errcode_item("23", "IntegrityConstraintViolation") |
jbe/bsw@0 | 134 mondelefant_errcode_item("24", "InvalidCursorState") |
jbe/bsw@0 | 135 mondelefant_errcode_item("25", "InvalidTransactionState") |
jbe/bsw@0 | 136 mondelefant_errcode_item("26", "InvalidSqlStatementName") |
jbe/bsw@0 | 137 mondelefant_errcode_item("27", "TriggeredDataChangeViolation") |
jbe/bsw@0 | 138 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification") |
jbe/bsw@0 | 139 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist") |
jbe/bsw@0 | 140 mondelefant_errcode_item("2D", "InvalidTransactionTermination") |
jbe/bsw@0 | 141 mondelefant_errcode_item("2F", "SqlRoutineException") |
jbe/bsw@0 | 142 mondelefant_errcode_item("34", "InvalidCursorName") |
jbe/bsw@0 | 143 mondelefant_errcode_item("38", "ExternalRoutineException") |
jbe/bsw@0 | 144 mondelefant_errcode_item("39", "ExternalRoutineInvocationException") |
jbe/bsw@0 | 145 mondelefant_errcode_item("3B", "SavepointException") |
jbe/bsw@0 | 146 mondelefant_errcode_item("3D", "InvalidCatalogName") |
jbe/bsw@0 | 147 mondelefant_errcode_item("3F", "InvalidSchemaName") |
jbe/bsw@0 | 148 mondelefant_errcode_item("40", "TransactionRollback") |
jbe/bsw@0 | 149 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation") |
jbe/bsw@0 | 150 mondelefant_errcode_item("44", "WithCheckOptionViolation") |
jbe/bsw@0 | 151 mondelefant_errcode_item("53", "InsufficientResources") |
jbe/bsw@0 | 152 mondelefant_errcode_item("54", "ProgramLimitExceeded") |
jbe/bsw@0 | 153 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState") |
jbe/bsw@0 | 154 mondelefant_errcode_item("57", "OperatorIntervention") |
jbe/bsw@0 | 155 mondelefant_errcode_item("58", "SystemError") |
jbe/bsw@0 | 156 mondelefant_errcode_item("F0", "ConfigurationFileError") |
jbe/bsw@0 | 157 mondelefant_errcode_item("P0", "PlpgsqlError") |
jbe/bsw@0 | 158 mondelefant_errcode_item("XX", "InternalError") |
jbe/bsw@0 | 159 return "unknown"; |
jbe/bsw@0 | 160 } |
jbe/bsw@0 | 161 |
jbe@23 | 162 // C-function, checking if a given error code (as defined by this library) |
jbe@23 | 163 // is belonging to a certain class of errors (strings are equal or error |
jbe@23 | 164 // code begins with error class followed by a dot): |
jbe/bsw@0 | 165 static int mondelefant_check_error_class( |
jbe/bsw@0 | 166 const char *errcode, const char *errclass |
jbe/bsw@0 | 167 ) { |
jbe/bsw@0 | 168 size_t i = 0; |
jbe/bsw@0 | 169 while (1) { |
jbe/bsw@0 | 170 if (errclass[i] == 0) { |
jbe/bsw@0 | 171 if (errcode[i] == 0 || errcode[i] == '.') return 1; |
jbe/bsw@0 | 172 else return 0; |
jbe/bsw@0 | 173 } |
jbe/bsw@0 | 174 if (errcode[i] != errclass[i]) return 0; |
jbe/bsw@0 | 175 i++; |
jbe/bsw@0 | 176 } |
jbe/bsw@0 | 177 } |
jbe/bsw@0 | 178 |
jbe@23 | 179 // pushing first line of a string on Lua's stack (without trailing CR/LF): |
jbe/bsw@0 | 180 static void mondelefant_push_first_line(lua_State *L, const char *str) { |
jbe/bsw@0 | 181 char *str2; |
jbe/bsw@0 | 182 size_t i = 0; |
jbe/bsw@0 | 183 if (!str) abort(); // should not happen |
jbe/bsw@0 | 184 str2 = strdup(str); |
jbe/bsw@0 | 185 while (1) { |
jbe/bsw@0 | 186 char c = str2[i]; |
jbe/bsw@0 | 187 if (c == '\n' || c == '\r' || c == 0) { str2[i] = 0; break; } |
jbe/bsw@0 | 188 i++; |
jbe/bsw@0 | 189 }; |
jbe/bsw@0 | 190 lua_pushstring(L, str2); |
jbe/bsw@0 | 191 free(str2); |
jbe/bsw@0 | 192 } |
jbe/bsw@0 | 193 |
jbe@23 | 194 // "connect" function of library, which establishes a database connection |
jbe@23 | 195 // and returns a database connection handle: |
jbe/bsw@0 | 196 static int mondelefant_connect(lua_State *L) { |
jbe@23 | 197 luaL_Buffer buf; // Lua string buffer to create 'conninfo' (see below) |
jbe@23 | 198 const char *conninfo; // string for PQconnectdb function |
jbe@23 | 199 PGconn *pgconn; // PGconn object as returned by PQconnectdb function |
jbe@23 | 200 mondelefant_conn_t *conn; // C-structure for userdata |
jbe@23 | 201 // if engine is anything but "postgresql", then raise error: |
jbe/bsw@0 | 202 lua_settop(L, 1); |
jbe/bsw@0 | 203 lua_getfield(L, 1, "engine"); // 2 |
jbe/bsw@0 | 204 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 205 return luaL_error(L, "No database engine selected."); |
jbe/bsw@0 | 206 } |
jbe/bsw@0 | 207 lua_pushliteral(L, "postgresql"); // 3 |
jbe/bsw@0 | 208 if (!lua_rawequal(L, 2, 3)) { |
jbe/bsw@0 | 209 return luaL_error(L, |
jbe/bsw@0 | 210 "Only database engine 'postgresql' is supported." |
jbe/bsw@0 | 211 ); |
jbe/bsw@0 | 212 } |
jbe@40 | 213 // copy conninfo string for PQconnectdb function from argument table to |
jbe@40 | 214 // stack position 2: |
jbe/bsw@0 | 215 lua_settop(L, 1); |
jbe@40 | 216 lua_getfield(L, 1, "conninfo"); // 2 |
jbe@40 | 217 // if no conninfo string was found, then assemble one from the named |
jbe@40 | 218 // options except "engine" option: |
jbe@40 | 219 if (!lua_toboolean(L, 2)) { |
jbe@40 | 220 lua_settop(L, 1); |
jbe@40 | 221 lua_pushnil(L); // slot for key at stack position 2 |
jbe@40 | 222 lua_pushnil(L); // slot for value at stack position 3 |
jbe@40 | 223 luaL_buffinit(L, &buf); |
jbe@40 | 224 { |
jbe@40 | 225 int need_seperator = 0; |
jbe@40 | 226 while (lua_pushvalue(L, 2), lua_next(L, 1)) { |
jbe@40 | 227 lua_replace(L, 3); |
jbe@40 | 228 lua_replace(L, 2); |
jbe@40 | 229 // NOTE: numbers will be converted to strings automatically here, |
jbe@40 | 230 // but perhaps this will change in future versions of lua |
jbe@40 | 231 luaL_argcheck(L, |
jbe@40 | 232 lua_isstring(L, 2) && lua_isstring(L, 3), 1, "non-string contained" |
jbe@40 | 233 ); |
jbe@40 | 234 lua_pushvalue(L, 2); |
jbe@40 | 235 lua_pushliteral(L, "engine"); |
jbe@40 | 236 if (!lua_rawequal(L, -2, -1)) { |
jbe@40 | 237 const char *value; |
jbe@40 | 238 size_t value_len; |
jbe@40 | 239 size_t value_pos = 0; |
jbe@40 | 240 lua_pop(L, 1); |
jbe@40 | 241 if (need_seperator) luaL_addchar(&buf, ' '); |
jbe@40 | 242 luaL_addvalue(&buf); |
jbe@40 | 243 luaL_addchar(&buf, '='); |
jbe@40 | 244 luaL_addchar(&buf, '\''); |
jbe@40 | 245 value = lua_tolstring(L, 3, &value_len); |
jbe@40 | 246 do { |
jbe@40 | 247 char c; |
jbe@40 | 248 c = value[value_pos++]; |
jbe@40 | 249 if (c == '\'') luaL_addchar(&buf, '\\'); |
jbe@40 | 250 luaL_addchar(&buf, c); |
jbe@40 | 251 } while (value_pos < value_len); |
jbe@40 | 252 luaL_addchar(&buf, '\''); |
jbe@40 | 253 need_seperator = 1; |
jbe@40 | 254 } else { |
jbe@40 | 255 lua_pop(L, 1); |
jbe@40 | 256 } |
jbe/bsw@0 | 257 } |
jbe/bsw@0 | 258 } |
jbe@40 | 259 luaL_pushresult(&buf); |
jbe@40 | 260 lua_replace(L, 2); |
jbe@40 | 261 lua_settop(L, 2); |
jbe/bsw@0 | 262 } |
jbe@40 | 263 // use conninfo string on stack position 2: |
jbe/bsw@0 | 264 conninfo = lua_tostring(L, 2); |
jbe@23 | 265 // call PQconnectdb function of libpq: |
jbe/bsw@0 | 266 pgconn = PQconnectdb(conninfo); |
jbe@23 | 267 // throw errors, if neccessary: |
jbe/bsw@0 | 268 if (!pgconn) { |
jbe/bsw@0 | 269 return luaL_error(L, |
jbe/bsw@0 | 270 "Error in libpq while creating 'PGconn' structure." |
jbe/bsw@0 | 271 ); |
jbe/bsw@0 | 272 } |
jbe/bsw@0 | 273 if (PQstatus(pgconn) != CONNECTION_OK) { |
jbe/bsw@0 | 274 const char *errmsg; |
jbe/bsw@0 | 275 lua_pushnil(L); |
jbe/bsw@0 | 276 errmsg = PQerrorMessage(pgconn); |
jbe/bsw@0 | 277 if (errmsg) { |
jbe/bsw@0 | 278 mondelefant_push_first_line(L, errmsg); |
jbe/bsw@0 | 279 } else { |
jbe/bsw@0 | 280 lua_pushliteral(L, |
jbe/bsw@0 | 281 "Error while connecting to database, but no error message given." |
jbe/bsw@0 | 282 ); |
jbe/bsw@0 | 283 } |
jbe/bsw@0 | 284 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION); |
jbe/bsw@0 | 285 PQfinish(pgconn); |
jbe/bsw@0 | 286 return 3; |
jbe/bsw@0 | 287 } |
jbe@23 | 288 // create userdata: |
jbe/bsw@0 | 289 lua_settop(L, 0); |
jbe/bsw@0 | 290 conn = lua_newuserdata(L, sizeof(*conn)); // 1 |
jbe@23 | 291 // set 'pgconn' in C-struct of userdata: |
jbe/bsw@0 | 292 conn->pgconn = pgconn; |
jbe@23 | 293 // set 'server_encoding' in C-struct of userdata: |
jbe/bsw@0 | 294 { |
jbe/bsw@0 | 295 const char *charset; |
jbe/bsw@0 | 296 charset = PQparameterStatus(pgconn, "server_encoding"); |
jbe/bsw@0 | 297 if (charset && !strcmp(charset, "UTF8")) { |
jbe/bsw@0 | 298 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8; |
jbe/bsw@0 | 299 } else { |
jbe/bsw@0 | 300 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII; |
jbe/bsw@0 | 301 } |
jbe/bsw@0 | 302 } |
jbe@23 | 303 // set meta-table of userdata: |
jbe/bsw@0 | 304 luaL_getmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2 |
jbe/bsw@0 | 305 lua_setmetatable(L, 1); |
jbe@23 | 306 // create entry in table storing connection specific data and associate |
jbe@23 | 307 // created userdata with it: |
jbe/bsw@0 | 308 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 2 |
jbe/bsw@0 | 309 lua_pushvalue(L, 1); // 3 |
jbe/bsw@0 | 310 lua_newtable(L); // 4 |
jbe/bsw@0 | 311 lua_settable(L, 2); |
jbe/bsw@0 | 312 lua_settop(L, 1); |
jbe@23 | 313 // store key "engine" with value "postgresql" as connection specific data: |
jbe/bsw@0 | 314 lua_pushliteral(L, "postgresql"); |
jbe/bsw@0 | 315 lua_setfield(L, 1, "engine"); |
jbe@23 | 316 // return userdata: |
jbe/bsw@0 | 317 return 1; |
jbe/bsw@0 | 318 } |
jbe/bsw@0 | 319 |
jbe@23 | 320 // returns pointer to libpq handle 'pgconn' of userdata at given index |
jbe@23 | 321 // (or throws error, if database connection has been closed): |
jbe/bsw@0 | 322 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) { |
jbe/bsw@0 | 323 mondelefant_conn_t *conn; |
jbe/bsw@0 | 324 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY); |
jbe/bsw@0 | 325 if (!conn->pgconn) { |
jbe/bsw@0 | 326 luaL_error(L, "PostgreSQL connection has been closed."); |
jbe/bsw@0 | 327 return NULL; |
jbe/bsw@0 | 328 } |
jbe/bsw@0 | 329 return conn; |
jbe/bsw@0 | 330 } |
jbe/bsw@0 | 331 |
jbe@23 | 332 // meta-method "__index" of database handles (userdata): |
jbe/bsw@0 | 333 static int mondelefant_conn_index(lua_State *L) { |
jbe@23 | 334 // try table for connection specific data: |
jbe/bsw@0 | 335 lua_settop(L, 2); |
jbe/bsw@0 | 336 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 3 |
jbe/bsw@0 | 337 lua_pushvalue(L, 1); // 4 |
jbe/bsw@0 | 338 lua_gettable(L, 3); // 4 |
jbe/bsw@0 | 339 lua_remove(L, 3); // connection specific data-table at stack position 3 |
jbe/bsw@0 | 340 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 341 lua_gettable(L, 3); // 4 |
jbe/bsw@0 | 342 if (!lua_isnil(L, 4)) return 1; |
jbe@23 | 343 // try to use prototype stored in connection specific data: |
jbe/bsw@0 | 344 lua_settop(L, 3); |
jbe/bsw@0 | 345 lua_getfield(L, 3, "prototype"); // 4 |
jbe/bsw@0 | 346 if (lua_toboolean(L, 4)) { |
jbe/bsw@0 | 347 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 348 lua_gettable(L, 4); // 5 |
jbe/bsw@0 | 349 if (!lua_isnil(L, 5)) return 1; |
jbe/bsw@0 | 350 } |
jbe@23 | 351 // try to use "postgresql_connection_prototype" of library: |
jbe/bsw@0 | 352 lua_settop(L, 2); |
jbe/bsw@0 | 353 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3 |
jbe/bsw@0 | 354 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4 |
jbe/bsw@0 | 355 if (lua_toboolean(L, 4)) { |
jbe/bsw@0 | 356 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 357 lua_gettable(L, 4); // 5 |
jbe/bsw@0 | 358 if (!lua_isnil(L, 5)) return 1; |
jbe/bsw@0 | 359 } |
jbe@23 | 360 // try to use "connection_prototype" of library: |
jbe/bsw@0 | 361 lua_settop(L, 3); |
jbe/bsw@0 | 362 lua_getfield(L, 3, "connection_prototype"); // 4 |
jbe/bsw@0 | 363 if (lua_toboolean(L, 4)) { |
jbe/bsw@0 | 364 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 365 lua_gettable(L, 4); // 5 |
jbe/bsw@0 | 366 if (!lua_isnil(L, 5)) return 1; |
jbe/bsw@0 | 367 } |
jbe@23 | 368 // give up and return nothing: |
jbe/bsw@0 | 369 return 0; |
jbe/bsw@0 | 370 } |
jbe/bsw@0 | 371 |
jbe@23 | 372 // meta-method "__newindex" of database handles (userdata): |
jbe/bsw@0 | 373 static int mondelefant_conn_newindex(lua_State *L) { |
jbe@23 | 374 // store key-value pair in table for connection specific data: |
jbe/bsw@0 | 375 lua_settop(L, 3); |
jbe/bsw@0 | 376 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 4 |
jbe/bsw@0 | 377 lua_pushvalue(L, 1); // 5 |
jbe/bsw@0 | 378 lua_gettable(L, 4); // 5 |
jbe@23 | 379 lua_remove(L, 4); // connection specific data-table at stack position 4 |
jbe/bsw@0 | 380 lua_pushvalue(L, 2); |
jbe/bsw@0 | 381 lua_pushvalue(L, 3); |
jbe/bsw@0 | 382 lua_settable(L, 4); |
jbe@23 | 383 // return nothing: |
jbe/bsw@0 | 384 return 0; |
jbe/bsw@0 | 385 } |
jbe/bsw@0 | 386 |
jbe@23 | 387 // meta-method "__gc" of database handles: |
jbe/bsw@0 | 388 static int mondelefant_conn_free(lua_State *L) { |
jbe/bsw@0 | 389 mondelefant_conn_t *conn; |
jbe/bsw@0 | 390 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY); |
jbe/bsw@0 | 391 if (conn->pgconn) PQfinish(conn->pgconn); |
jbe/bsw@0 | 392 conn->pgconn = NULL; |
jbe/bsw@0 | 393 return 0; |
jbe/bsw@0 | 394 } |
jbe/bsw@0 | 395 |
jbe@23 | 396 // method "close" of database handles: |
jbe/bsw@0 | 397 static int mondelefant_conn_close(lua_State *L) { |
jbe/bsw@0 | 398 mondelefant_conn_t *conn; |
jbe/bsw@0 | 399 lua_settop(L, 1); |
jbe/bsw@0 | 400 conn = mondelefant_get_conn(L, 1); |
jbe/bsw@0 | 401 PQfinish(conn->pgconn); |
jbe/bsw@0 | 402 conn->pgconn = NULL; |
jbe/bsw@0 | 403 return 0; |
jbe/bsw@0 | 404 } |
jbe/bsw@0 | 405 |
jbe@23 | 406 // method "is_okay" of database handles: |
jbe/bsw@0 | 407 static int mondelefant_conn_is_ok(lua_State *L) { |
jbe/bsw@0 | 408 mondelefant_conn_t *conn; |
jbe/bsw@0 | 409 lua_settop(L, 1); |
jbe/bsw@0 | 410 conn = mondelefant_get_conn(L, 1); |
jbe/bsw@0 | 411 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK); |
jbe/bsw@0 | 412 return 1; |
jbe/bsw@0 | 413 } |
jbe/bsw@0 | 414 |
jbe@23 | 415 // method "get_transaction_status" of database handles: |
jbe/bsw@0 | 416 static int mondelefant_conn_get_transaction_status(lua_State *L) { |
jbe/bsw@0 | 417 mondelefant_conn_t *conn; |
jbe/bsw@0 | 418 lua_settop(L, 1); |
jbe/bsw@0 | 419 conn = mondelefant_get_conn(L, 1); |
jbe/bsw@0 | 420 switch (PQtransactionStatus(conn->pgconn)) { |
jbe/bsw@0 | 421 case PQTRANS_IDLE: |
jbe/bsw@0 | 422 lua_pushliteral(L, "idle"); |
jbe/bsw@0 | 423 break; |
jbe/bsw@0 | 424 case PQTRANS_ACTIVE: |
jbe/bsw@0 | 425 lua_pushliteral(L, "active"); |
jbe/bsw@0 | 426 break; |
jbe/bsw@0 | 427 case PQTRANS_INTRANS: |
jbe/bsw@0 | 428 lua_pushliteral(L, "intrans"); |
jbe/bsw@0 | 429 break; |
jbe/bsw@0 | 430 case PQTRANS_INERROR: |
jbe/bsw@0 | 431 lua_pushliteral(L, "inerror"); |
jbe/bsw@0 | 432 break; |
jbe/bsw@0 | 433 default: |
jbe/bsw@0 | 434 lua_pushliteral(L, "unknown"); |
jbe/bsw@0 | 435 } |
jbe/bsw@0 | 436 return 1; |
jbe/bsw@0 | 437 } |
jbe/bsw@0 | 438 |
jbe@23 | 439 // method "create_list" of database handles: |
jbe/bsw@0 | 440 static int mondelefant_conn_create_list(lua_State *L) { |
jbe@23 | 441 // ensure that first argument is a database connection: |
jbe/bsw@0 | 442 lua_settop(L, 2); |
jbe/bsw@0 | 443 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY); |
jbe@23 | 444 // if no second argument is given, use an empty table: |
jbe/bsw@0 | 445 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 446 lua_newtable(L); |
jbe/bsw@0 | 447 lua_replace(L, 2); // new result at stack position 2 |
jbe/bsw@0 | 448 } |
jbe@23 | 449 // set meta-table for database result lists/objects: |
jbe/bsw@0 | 450 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3 |
jbe/bsw@0 | 451 lua_setmetatable(L, 2); |
jbe@23 | 452 // set "_connection" attribute to self: |
jbe/bsw@0 | 453 lua_pushvalue(L, 1); // 3 |
jbe/bsw@0 | 454 lua_setfield(L, 2, "_connection"); |
jbe@23 | 455 // set "_type" attribute to string "list": |
jbe/bsw@0 | 456 lua_pushliteral(L, "list"); // 3 |
jbe/bsw@0 | 457 lua_setfield(L, 2, "_type"); |
jbe@23 | 458 // return created database result list: |
jbe/bsw@0 | 459 return 1; |
jbe/bsw@0 | 460 } |
jbe/bsw@0 | 461 |
jbe@23 | 462 // method "create_object" of database handles: |
jbe/bsw@0 | 463 static int mondelefant_conn_create_object(lua_State *L) { |
jbe@23 | 464 // ensure that first argument is a database connection: |
jbe/bsw@0 | 465 lua_settop(L, 2); |
jbe/bsw@0 | 466 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY); |
jbe@23 | 467 // if no second argument is given, use an empty table: |
jbe/bsw@0 | 468 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 469 lua_newtable(L); |
jbe/bsw@0 | 470 lua_replace(L, 2); // new result at stack position 2 |
jbe/bsw@0 | 471 } |
jbe@23 | 472 // set meta-table for database result lists/objects: |
jbe/bsw@0 | 473 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3 |
jbe/bsw@0 | 474 lua_setmetatable(L, 2); |
jbe@23 | 475 // set "_connection" attribute to self: |
jbe/bsw@0 | 476 lua_pushvalue(L, 1); // 3 |
jbe/bsw@0 | 477 lua_setfield(L, 2, "_connection"); |
jbe@23 | 478 // set "_type" attribute to string "object": |
jbe/bsw@0 | 479 lua_pushliteral(L, "object"); // 3 |
jbe/bsw@0 | 480 lua_setfield(L, 2, "_type"); // "object" or "list" |
jbe@23 | 481 // create empty tables for "_data", "_dirty" and "_ref" attributes: |
jbe/bsw@0 | 482 lua_newtable(L); // 3 |
jbe/bsw@0 | 483 lua_setfield(L, 2, "_data"); |
jbe/bsw@0 | 484 lua_newtable(L); // 3 |
jbe/bsw@0 | 485 lua_setfield(L, 2, "_dirty"); |
jbe/bsw@0 | 486 lua_newtable(L); // 3 |
jbe/bsw@0 | 487 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table |
jbe@23 | 488 // return created database result object: |
jbe/bsw@0 | 489 return 1; |
jbe/bsw@0 | 490 } |
jbe/bsw@0 | 491 |
jbe@23 | 492 // method "quote_string" of database handles: |
jbe/bsw@0 | 493 static int mondelefant_conn_quote_string(lua_State *L) { |
jbe/bsw@0 | 494 mondelefant_conn_t *conn; |
jbe/bsw@0 | 495 const char *input; |
jbe/bsw@0 | 496 size_t input_len; |
jbe/bsw@0 | 497 char *output; |
jbe/bsw@0 | 498 size_t output_len; |
jbe@23 | 499 // get 'conn' attribute of C-struct of database connection: |
jbe/bsw@0 | 500 lua_settop(L, 2); |
jbe/bsw@0 | 501 conn = mondelefant_get_conn(L, 1); |
jbe@23 | 502 // get second argument, which must be a string: |
jbe/bsw@0 | 503 input = luaL_checklstring(L, 2, &input_len); |
jbe@23 | 504 // throw error, if string is too long: |
jbe/bsw@0 | 505 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) { |
jbe/bsw@0 | 506 return luaL_error(L, "String to be escaped is too long."); |
jbe/bsw@0 | 507 } |
jbe@23 | 508 // allocate memory for quoted string: |
jbe/bsw@0 | 509 output = malloc((2 * input_len + 3) * sizeof(char)); |
jbe/bsw@0 | 510 if (!output) { |
jbe/bsw@0 | 511 return luaL_error(L, "Could not allocate memory for string quoting."); |
jbe/bsw@0 | 512 } |
jbe@23 | 513 // do escaping by calling PQescapeStringConn and enclosing result with |
jbe@23 | 514 // single quotes: |
jbe/bsw@0 | 515 output[0] = '\''; |
jbe/bsw@0 | 516 output_len = PQescapeStringConn( |
jbe/bsw@0 | 517 conn->pgconn, output + 1, input, input_len, NULL |
jbe/bsw@0 | 518 ); |
jbe/bsw@0 | 519 output[output_len + 1] = '\''; |
jbe/bsw@0 | 520 output[output_len + 2] = 0; |
jbe@23 | 521 // create Lua string: |
jbe/bsw@0 | 522 lua_pushlstring(L, output, output_len + 2); |
jbe@23 | 523 // free allocated memory: |
jbe/bsw@0 | 524 free(output); |
jbe@23 | 525 // return Lua string: |
jbe/bsw@0 | 526 return 1; |
jbe/bsw@0 | 527 } |
jbe/bsw@0 | 528 |
jbe@23 | 529 // method "quote_binary" of database handles: |
jbe/bsw@0 | 530 static int mondelefant_conn_quote_binary(lua_State *L) { |
jbe/bsw@0 | 531 mondelefant_conn_t *conn; |
jbe/bsw@0 | 532 const char *input; |
jbe/bsw@0 | 533 size_t input_len; |
jbe/bsw@0 | 534 char *output; |
jbe/bsw@0 | 535 size_t output_len; |
jbe/bsw@0 | 536 luaL_Buffer buf; |
jbe@23 | 537 // get 'conn' attribute of C-struct of database connection: |
jbe/bsw@0 | 538 lua_settop(L, 2); |
jbe/bsw@0 | 539 conn = mondelefant_get_conn(L, 1); |
jbe@23 | 540 // get second argument, which must be a string: |
jbe/bsw@0 | 541 input = luaL_checklstring(L, 2, &input_len); |
jbe@23 | 542 // call PQescapeByteaConn, which allocates memory itself: |
jbe/bsw@0 | 543 output = (char *)PQescapeByteaConn( |
jbe/bsw@0 | 544 conn->pgconn, (const unsigned char *)input, input_len, &output_len |
jbe/bsw@0 | 545 ); |
jbe@23 | 546 // if PQescapeByteaConn returned NULL, then throw error: |
jbe/bsw@0 | 547 if (!output) { |
jbe/bsw@0 | 548 return luaL_error(L, "Could not allocate memory for binary quoting."); |
jbe/bsw@0 | 549 } |
jbe@23 | 550 // create Lua string enclosed by single quotes: |
jbe/bsw@0 | 551 luaL_buffinit(L, &buf); |
jbe/bsw@0 | 552 luaL_addchar(&buf, '\''); |
jbe/bsw@0 | 553 luaL_addlstring(&buf, output, output_len - 1); |
jbe/bsw@0 | 554 luaL_addchar(&buf, '\''); |
jbe/bsw@0 | 555 luaL_pushresult(&buf); |
jbe@23 | 556 // free memory allocated by PQescapeByteaConn: |
jbe/bsw@0 | 557 PQfreemem(output); |
jbe@23 | 558 // return Lua string: |
jbe/bsw@0 | 559 return 1; |
jbe/bsw@0 | 560 } |
jbe/bsw@0 | 561 |
jbe@23 | 562 // method "assemble_command" of database handles: |
jbe/bsw@0 | 563 static int mondelefant_conn_assemble_command(lua_State *L) { |
jbe/bsw@0 | 564 mondelefant_conn_t *conn; |
jbe/bsw@0 | 565 int paramidx = 2; |
jbe/bsw@0 | 566 const char *template; |
jbe/bsw@0 | 567 size_t template_pos = 0; |
jbe/bsw@0 | 568 luaL_Buffer buf; |
jbe@23 | 569 // get 'conn' attribute of C-struct of database connection: |
jbe/bsw@0 | 570 lua_settop(L, 2); |
jbe/bsw@0 | 571 conn = mondelefant_get_conn(L, 1); |
jbe@23 | 572 // if second argument is a string, return this string: |
jbe/bsw@0 | 573 if (lua_isstring(L, 2)) { |
jbe/bsw@0 | 574 lua_tostring(L, 2); |
jbe/bsw@0 | 575 return 1; |
jbe/bsw@0 | 576 } |
jbe@23 | 577 // if second argument has __tostring meta-method, |
jbe@23 | 578 // then use this method and return its result: |
jbe/bsw@0 | 579 if (luaL_callmeta(L, 2, "__tostring")) return 1; |
jbe@23 | 580 // otherwise, require that second argument is a table: |
jbe/bsw@0 | 581 luaL_checktype(L, 2, LUA_TTABLE); |
jbe@23 | 582 // get first element of table, which must be a string: |
jbe/bsw@0 | 583 lua_rawgeti(L, 2, 1); // 3 |
jbe/bsw@0 | 584 luaL_argcheck(L, |
jbe/bsw@0 | 585 lua_isstring(L, 3), |
jbe/bsw@0 | 586 2, |
jbe/bsw@0 | 587 "First entry of SQL command structure is not a string." |
jbe/bsw@0 | 588 ); |
jbe/bsw@0 | 589 template = lua_tostring(L, 3); |
jbe@23 | 590 // get value of "input_converter" attribute of database connection: |
jbe/bsw@0 | 591 lua_pushliteral(L, "input_converter"); // 4 |
jbe/bsw@0 | 592 lua_gettable(L, 1); // input_converter at stack position 4 |
jbe@23 | 593 // reserve space on Lua stack: |
jbe/bsw@0 | 594 lua_pushnil(L); // free space at stack position 5 |
jbe/bsw@0 | 595 lua_pushnil(L); // free space at stack position 6 |
jbe@23 | 596 // initialize Lua buffer for result string: |
jbe/bsw@0 | 597 luaL_buffinit(L, &buf); |
jbe@23 | 598 // fill buffer in loop: |
jbe/bsw@0 | 599 while (1) { |
jbe@23 | 600 // variable declaration: |
jbe/bsw@0 | 601 char c; |
jbe@23 | 602 // get next character: |
jbe/bsw@0 | 603 c = template[template_pos++]; |
jbe@23 | 604 // break, when character is NULL byte: |
jbe/bsw@0 | 605 if (!c) break; |
jbe@23 | 606 // question-mark and dollar-sign are special characters: |
jbe@23 | 607 if (c == '?' || c == '$') { // special character found |
jbe@23 | 608 // check, if same character follows: |
jbe@23 | 609 if (template[template_pos] == c) { // special character is escaped |
jbe@23 | 610 // consume two characters of input and add one character to buffer: |
jbe/bsw@0 | 611 template_pos++; |
jbe/bsw@0 | 612 luaL_addchar(&buf, c); |
jbe@23 | 613 } else { // special character is not escaped |
jbe/bsw@0 | 614 luaL_Buffer keybuf; |
jbe/bsw@0 | 615 int subcmd; |
jbe@23 | 616 // set 'subcmd' = true, if special character was a dollar-sign, |
jbe@23 | 617 // set 'subcmd' = false, if special character was a question-mark: |
jbe/bsw@0 | 618 subcmd = (c == '$'); |
jbe@23 | 619 // read any number of alpha numeric chars or underscores |
jbe@23 | 620 // and store them on Lua stack: |
jbe/bsw@0 | 621 luaL_buffinit(L, &keybuf); |
jbe/bsw@0 | 622 while (1) { |
jbe/bsw@0 | 623 c = template[template_pos]; |
jbe/bsw@0 | 624 if ( |
jbe/bsw@0 | 625 (c < 'A' || c > 'Z') && |
jbe/bsw@0 | 626 (c < 'a' || c > 'z') && |
jbe/bsw@0 | 627 (c < '0' || c > '9') && |
jbe/bsw@0 | 628 (c != '_') |
jbe/bsw@0 | 629 ) break; |
jbe/bsw@0 | 630 luaL_addchar(&keybuf, c); |
jbe/bsw@0 | 631 template_pos++; |
jbe/bsw@0 | 632 } |
jbe/bsw@0 | 633 luaL_pushresult(&keybuf); |
jbe@23 | 634 // check, if any characters matched: |
jbe@64 | 635 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 636 if (lua_rawlen(L, -1)) { |
jbe@64 | 637 #else |
jbe/bsw@0 | 638 if (lua_objlen(L, -1)) { |
jbe@64 | 639 #endif |
jbe@23 | 640 // if any alpha numeric chars or underscores were found, |
jbe@23 | 641 // push them on stack as a Lua string and use them to lookup |
jbe@23 | 642 // value from second argument: |
jbe/bsw@0 | 643 lua_pushvalue(L, -1); // save key on stack |
jbe@23 | 644 lua_gettable(L, 2); // fetch value (raw-value) |
jbe/bsw@0 | 645 } else { |
jbe@23 | 646 // otherwise push nil and use numeric lookup based on 'paramidx': |
jbe/bsw@0 | 647 lua_pop(L, 1); |
jbe/bsw@0 | 648 lua_pushnil(L); // put nil on key position |
jbe@23 | 649 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value) |
jbe/bsw@0 | 650 } |
jbe@23 | 651 // Lua stack contains: ..., <buffer>, key, raw-value |
jbe@23 | 652 // branch according to type of special character ("?" or "$"): |
jbe@23 | 653 if (subcmd) { // dollar-sign |
jbe/bsw@0 | 654 size_t i; |
jbe/bsw@0 | 655 size_t count; |
jbe@23 | 656 // store fetched value (which is supposed to be sub-structure) |
jbe@23 | 657 // on Lua stack position 5 and drop key: |
jbe@23 | 658 lua_replace(L, 5); |
jbe@23 | 659 lua_pop(L, 1); |
jbe@23 | 660 // Lua stack contains: ..., <buffer> |
jbe@23 | 661 // check, if fetched value is really a sub-structure: |
jbe/bsw@0 | 662 luaL_argcheck(L, |
jbe/bsw@0 | 663 !lua_isnil(L, 5), |
jbe/bsw@0 | 664 2, |
jbe/bsw@0 | 665 "SQL sub-structure not found." |
jbe/bsw@0 | 666 ); |
jbe/bsw@0 | 667 luaL_argcheck(L, |
jbe/bsw@0 | 668 lua_type(L, 5) == LUA_TTABLE, |
jbe/bsw@0 | 669 2, |
jbe/bsw@0 | 670 "SQL sub-structure must be a table." |
jbe/bsw@0 | 671 ); |
jbe@23 | 672 // Lua stack contains: ..., <buffer> |
jbe@23 | 673 // get value of "sep" attribute of sub-structure, |
jbe@23 | 674 // and place it on Lua stack position 6: |
jbe/bsw@0 | 675 lua_getfield(L, 5, "sep"); |
jbe@23 | 676 lua_replace(L, 6); |
jbe@23 | 677 // if seperator is nil, then use ", " as default, |
jbe@23 | 678 // if seperator is neither nil nor a string, then throw error: |
jbe/bsw@0 | 679 if (lua_isnil(L, 6)) { |
jbe/bsw@0 | 680 lua_pushstring(L, ", "); |
jbe/bsw@0 | 681 lua_replace(L, 6); |
jbe/bsw@0 | 682 } else { |
jbe/bsw@0 | 683 luaL_argcheck(L, |
jbe/bsw@0 | 684 lua_isstring(L, 6), |
jbe/bsw@0 | 685 2, |
jbe/bsw@0 | 686 "Seperator of SQL sub-structure has to be a string." |
jbe/bsw@0 | 687 ); |
jbe/bsw@0 | 688 } |
jbe@23 | 689 // iterate over items of sub-structure: |
jbe@64 | 690 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 691 count = lua_rawlen(L, 5); |
jbe@64 | 692 #else |
jbe/bsw@0 | 693 count = lua_objlen(L, 5); |
jbe@64 | 694 #endif |
jbe/bsw@0 | 695 for (i = 0; i < count; i++) { |
jbe@23 | 696 // add seperator, unless this is the first run: |
jbe/bsw@0 | 697 if (i) { |
jbe/bsw@0 | 698 lua_pushvalue(L, 6); |
jbe/bsw@0 | 699 luaL_addvalue(&buf); |
jbe/bsw@0 | 700 } |
jbe@23 | 701 // recursivly apply assemble function and add results to buffer: |
jbe/bsw@0 | 702 lua_pushcfunction(L, mondelefant_conn_assemble_command); |
jbe/bsw@0 | 703 lua_pushvalue(L, 1); |
jbe/bsw@0 | 704 lua_rawgeti(L, 5, i+1); |
jbe/bsw@0 | 705 lua_call(L, 2, 1); |
jbe/bsw@0 | 706 luaL_addvalue(&buf); |
jbe/bsw@0 | 707 } |
jbe@23 | 708 } else { // question-mark |
jbe/bsw@0 | 709 if (lua_toboolean(L, 4)) { |
jbe@23 | 710 // call input_converter with connection handle, raw-value and |
jbe@23 | 711 // an info-table which contains a "field_name" entry with the |
jbe@23 | 712 // used key: |
jbe/bsw@0 | 713 lua_pushvalue(L, 4); |
jbe/bsw@0 | 714 lua_pushvalue(L, 1); |
jbe/bsw@0 | 715 lua_pushvalue(L, -3); |
jbe/bsw@0 | 716 lua_newtable(L); |
jbe/bsw@0 | 717 lua_pushvalue(L, -6); |
jbe/bsw@0 | 718 lua_setfield(L, -2, "field_name"); |
jbe/bsw@0 | 719 lua_call(L, 3, 1); |
jbe@23 | 720 // Lua stack contains: ..., <buffer>, key, raw-value, final-value |
jbe@23 | 721 // remove key and raw-value: |
jbe/bsw@0 | 722 lua_remove(L, -2); |
jbe/bsw@0 | 723 lua_remove(L, -2); |
jbe@23 | 724 // Lua stack contains: ..., <buffer>, final-value |
jbe@23 | 725 // throw error, if final-value is not a string: |
jbe/bsw@0 | 726 if (!lua_isstring(L, -1)) { |
jbe/bsw@0 | 727 return luaL_error(L, "input_converter returned non-string."); |
jbe/bsw@0 | 728 } |
jbe/bsw@0 | 729 } else { |
jbe@23 | 730 // remove key from stack: |
jbe/bsw@0 | 731 lua_remove(L, -2); |
jbe@23 | 732 // Lua stack contains: ..., <buffer>, raw-value |
jbe@23 | 733 // branch according to type of value: |
jbe@23 | 734 if (lua_isnil(L, -1)) { // value is nil |
jbe@23 | 735 // push string "NULL" to stack: |
jbe/bsw@0 | 736 lua_pushliteral(L, "NULL"); |
jbe@23 | 737 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean |
jbe@23 | 738 // push strings "TRUE" or "FALSE" to stack: |
jbe/bsw@0 | 739 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE"); |
jbe@23 | 740 } else if (lua_isstring(L, -1)) { // value is string or number |
jbe/bsw@0 | 741 // NOTE: In this version of lua a number will be converted |
jbe@23 | 742 // push output of "quote_string" method of database |
jbe@23 | 743 // connection to stack: |
jbe/bsw@0 | 744 lua_tostring(L, -1); |
jbe/bsw@0 | 745 lua_pushcfunction(L, mondelefant_conn_quote_string); |
jbe/bsw@0 | 746 lua_pushvalue(L, 1); |
jbe/bsw@0 | 747 lua_pushvalue(L, -3); |
jbe/bsw@0 | 748 lua_call(L, 2, 1); |
jbe@23 | 749 } else { // value is of other type |
jbe@23 | 750 // throw error: |
jbe/bsw@0 | 751 return luaL_error(L, |
jbe/bsw@0 | 752 "Unable to convert SQL value due to unknown type " |
jbe/bsw@0 | 753 "or missing input_converter." |
jbe/bsw@0 | 754 ); |
jbe/bsw@0 | 755 } |
jbe@23 | 756 // Lua stack contains: ..., <buffer>, raw-value, final-value |
jbe@23 | 757 // remove raw-value: |
jbe/bsw@0 | 758 lua_remove(L, -2); |
jbe@23 | 759 // Lua stack contains: ..., <buffer>, final-value |
jbe/bsw@0 | 760 } |
jbe@23 | 761 // append final-value to buffer: |
jbe/bsw@0 | 762 luaL_addvalue(&buf); |
jbe/bsw@0 | 763 } |
jbe/bsw@0 | 764 } |
jbe@23 | 765 } else { // character is not special |
jbe@23 | 766 // just copy character: |
jbe/bsw@0 | 767 luaL_addchar(&buf, c); |
jbe/bsw@0 | 768 } |
jbe/bsw@0 | 769 } |
jbe@23 | 770 // return string in buffer: |
jbe/bsw@0 | 771 luaL_pushresult(&buf); |
jbe/bsw@0 | 772 return 1; |
jbe/bsw@0 | 773 } |
jbe/bsw@0 | 774 |
jbe@23 | 775 // max number of SQL statements executed by one "query" method call: |
jbe/bsw@0 | 776 #define MONDELEFANT_MAX_COMMAND_COUNT 64 |
jbe@23 | 777 // max number of columns in a database result: |
jbe/bsw@0 | 778 #define MONDELEFANT_MAX_COLUMN_COUNT 1024 |
jbe@23 | 779 // enum values for 'modes' array in C-function below: |
jbe/bsw@0 | 780 #define MONDELEFANT_QUERY_MODE_LIST 1 |
jbe/bsw@0 | 781 #define MONDELEFANT_QUERY_MODE_OBJECT 2 |
jbe/bsw@0 | 782 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3 |
jbe/bsw@0 | 783 |
jbe@23 | 784 // method "try_query" of database handles: |
jbe/bsw@0 | 785 static int mondelefant_conn_try_query(lua_State *L) { |
jbe/bsw@0 | 786 mondelefant_conn_t *conn; |
jbe/bsw@0 | 787 int command_count; |
jbe/bsw@0 | 788 int command_idx; |
jbe/bsw@0 | 789 int modes[MONDELEFANT_MAX_COMMAND_COUNT]; |
jbe/bsw@0 | 790 luaL_Buffer buf; |
jbe/bsw@0 | 791 int sent_success; |
jbe/bsw@0 | 792 PGresult *res; |
jbe/bsw@0 | 793 int rows, cols, row, col; |
jbe@23 | 794 // get 'conn' attribute of C-struct of database connection: |
jbe/bsw@0 | 795 conn = mondelefant_get_conn(L, 1); |
jbe@23 | 796 // calculate number of commands (2 arguments for one command): |
jbe/bsw@0 | 797 command_count = lua_gettop(L) / 2; |
jbe@23 | 798 // push nil on stack, which is needed, if last mode was ommitted: |
jbe@23 | 799 lua_pushnil(L); |
jbe@23 | 800 // throw error, if number of commands is too high: |
jbe/bsw@0 | 801 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) { |
jbe/bsw@0 | 802 return luaL_error(L, "Exceeded maximum command count in one query."); |
jbe/bsw@0 | 803 } |
jbe@23 | 804 // create SQL string, store query modes and push SQL string on stack: |
jbe/bsw@0 | 805 luaL_buffinit(L, &buf); |
jbe/bsw@0 | 806 for (command_idx = 0; command_idx < command_count; command_idx++) { |
jbe/bsw@0 | 807 int mode; |
jbe/bsw@0 | 808 int mode_idx; // stack index of mode string |
jbe/bsw@0 | 809 if (command_idx) luaL_addchar(&buf, ' '); |
jbe/bsw@0 | 810 lua_pushcfunction(L, mondelefant_conn_assemble_command); |
jbe/bsw@0 | 811 lua_pushvalue(L, 1); |
jbe/bsw@0 | 812 lua_pushvalue(L, 2 + 2 * command_idx); |
jbe/bsw@0 | 813 lua_call(L, 2, 1); |
jbe/bsw@0 | 814 luaL_addvalue(&buf); |
jbe/bsw@0 | 815 luaL_addchar(&buf, ';'); |
jbe/bsw@0 | 816 mode_idx = 3 + 2 * command_idx; |
jbe/bsw@0 | 817 if (lua_isnil(L, mode_idx)) { |
jbe/bsw@0 | 818 mode = MONDELEFANT_QUERY_MODE_LIST; |
jbe/bsw@0 | 819 } else { |
jbe/bsw@0 | 820 const char *modestr; |
jbe/bsw@0 | 821 modestr = luaL_checkstring(L, mode_idx); |
jbe/bsw@0 | 822 if (!strcmp(modestr, "list")) { |
jbe/bsw@0 | 823 mode = MONDELEFANT_QUERY_MODE_LIST; |
jbe/bsw@0 | 824 } else if (!strcmp(modestr, "object")) { |
jbe/bsw@0 | 825 mode = MONDELEFANT_QUERY_MODE_OBJECT; |
jbe/bsw@0 | 826 } else if (!strcmp(modestr, "opt_object")) { |
jbe/bsw@0 | 827 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT; |
jbe/bsw@0 | 828 } else { |
jbe/bsw@0 | 829 return luaL_error(L, "Unknown query mode specified."); |
jbe/bsw@0 | 830 } |
jbe/bsw@0 | 831 } |
jbe/bsw@0 | 832 modes[command_idx] = mode; |
jbe/bsw@0 | 833 } |
jbe/bsw@0 | 834 luaL_pushresult(&buf); // stack position unknown |
jbe/bsw@0 | 835 lua_replace(L, 2); // SQL command string to stack position 2 |
jbe@23 | 836 // call sql_tracer, if set: |
jbe/bsw@0 | 837 lua_settop(L, 2); |
jbe/bsw@0 | 838 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3 |
jbe/bsw@0 | 839 if (lua_toboolean(L, 3)) { |
jbe/bsw@0 | 840 lua_pushvalue(L, 1); // 4 |
jbe/bsw@0 | 841 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 842 lua_call(L, 2, 1); // trace callback at stack position 3 |
jbe/bsw@0 | 843 } |
jbe@23 | 844 // NOTE: If no tracer was found, then nil or false is stored at stack |
jbe@23 | 845 // position 3. |
jbe@23 | 846 // call PQsendQuery function and store result in 'sent_success' variable: |
jbe/bsw@0 | 847 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2)); |
jbe@23 | 848 // create preliminary result table: |
jbe/bsw@0 | 849 lua_newtable(L); // results in table at stack position 4 |
jbe@23 | 850 // iterate over results using function PQgetResult to fill result table: |
jbe/bsw@0 | 851 for (command_idx = 0; ; command_idx++) { |
jbe/bsw@0 | 852 int mode; |
jbe/bsw@0 | 853 char binary[MONDELEFANT_MAX_COLUMN_COUNT]; |
jbe/bsw@0 | 854 ExecStatusType pgstatus; |
jbe@23 | 855 // fetch mode which was given for the command: |
jbe/bsw@0 | 856 mode = modes[command_idx]; |
jbe@23 | 857 // if PQsendQuery call was successful, then fetch result data: |
jbe/bsw@0 | 858 if (sent_success) { |
jbe@23 | 859 // NOTE: PQgetResult called one extra time. Break only, if all |
jbe@23 | 860 // queries have been processed and PQgetResult returned NULL. |
jbe/bsw@0 | 861 res = PQgetResult(conn->pgconn); |
jbe/bsw@0 | 862 if (command_idx >= command_count && !res) break; |
jbe/bsw@0 | 863 if (res) { |
jbe/bsw@0 | 864 pgstatus = PQresultStatus(res); |
jbe/bsw@0 | 865 rows = PQntuples(res); |
jbe/bsw@0 | 866 cols = PQnfields(res); |
jbe/bsw@0 | 867 } |
jbe/bsw@0 | 868 } |
jbe@23 | 869 // handle errors: |
jbe/bsw@0 | 870 if ( |
jbe/bsw@0 | 871 !sent_success || command_idx >= command_count || !res || |
jbe/bsw@0 | 872 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) || |
jbe/bsw@0 | 873 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) || |
jbe/bsw@0 | 874 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) |
jbe/bsw@0 | 875 ) { |
jbe/bsw@0 | 876 const char *command; |
jbe/bsw@0 | 877 command = lua_tostring(L, 2); |
jbe/bsw@0 | 878 lua_newtable(L); // 5 |
jbe/bsw@0 | 879 lua_getfield(L, |
jbe/bsw@0 | 880 LUA_REGISTRYINDEX, |
jbe/bsw@0 | 881 MONDELEFANT_ERROROBJECT_MT_REGKEY |
jbe/bsw@0 | 882 ); |
jbe/bsw@0 | 883 lua_setmetatable(L, 5); |
jbe/bsw@0 | 884 lua_pushvalue(L, 1); |
jbe/bsw@0 | 885 lua_setfield(L, 5, "connection"); |
jbe/bsw@0 | 886 lua_pushinteger(L, command_idx + 1); |
jbe/bsw@0 | 887 lua_setfield(L, 5, "command_number"); |
jbe/bsw@0 | 888 lua_pushvalue(L, 2); |
jbe/bsw@0 | 889 lua_setfield(L, 5, "sql_command"); |
jbe/bsw@0 | 890 if (!res) { |
jbe/bsw@0 | 891 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW); |
jbe/bsw@0 | 892 lua_setfield(L, 5, "code"); |
jbe/bsw@0 | 893 lua_pushliteral(L, "Received too few database result sets."); |
jbe/bsw@0 | 894 lua_setfield(L, 5, "message"); |
jbe/bsw@0 | 895 } else if (command_idx >= command_count) { |
jbe/bsw@0 | 896 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH); |
jbe/bsw@0 | 897 lua_setfield(L, 5, "code"); |
jbe/bsw@0 | 898 lua_pushliteral(L, "Received too many database result sets."); |
jbe/bsw@0 | 899 lua_setfield(L, 5, "message"); |
jbe/bsw@0 | 900 } else if ( |
jbe/bsw@0 | 901 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK |
jbe/bsw@0 | 902 ) { |
jbe/bsw@0 | 903 const char *sqlstate; |
jbe/bsw@0 | 904 const char *errmsg; |
jbe/bsw@0 | 905 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY)); |
jbe/bsw@0 | 906 lua_setfield(L, 5, "pg_severity"); |
jbe/bsw@0 | 907 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE); |
jbe/bsw@0 | 908 if (sqlstate) { |
jbe/bsw@0 | 909 lua_pushstring(L, sqlstate); |
jbe/bsw@0 | 910 lua_setfield(L, 5, "pg_sqlstate"); |
jbe/bsw@0 | 911 lua_pushstring(L, mondelefant_translate_errcode(sqlstate)); |
jbe/bsw@0 | 912 lua_setfield(L, 5, "code"); |
jbe/bsw@0 | 913 } else { |
jbe/bsw@0 | 914 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN); |
jbe/bsw@0 | 915 lua_setfield(L, 5, "code"); |
jbe/bsw@0 | 916 } |
jbe/bsw@0 | 917 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY); |
jbe/bsw@0 | 918 if (errmsg) { |
jbe/bsw@0 | 919 mondelefant_push_first_line(L, errmsg); |
jbe/bsw@0 | 920 lua_setfield(L, 5, "message"); |
jbe/bsw@0 | 921 lua_pushstring(L, errmsg); |
jbe/bsw@0 | 922 lua_setfield(L, 5, "pg_message_primary"); |
jbe/bsw@0 | 923 } else { |
jbe/bsw@0 | 924 lua_pushliteral(L, |
jbe/bsw@0 | 925 "Error while fetching result, but no error message given." |
jbe/bsw@0 | 926 ); |
jbe/bsw@0 | 927 lua_setfield(L, 5, "message"); |
jbe/bsw@0 | 928 } |
jbe/bsw@0 | 929 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL)); |
jbe/bsw@0 | 930 lua_setfield(L, 5, "pg_message_detail"); |
jbe/bsw@0 | 931 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT)); |
jbe/bsw@0 | 932 lua_setfield(L, 5, "pg_message_hint"); |
jbe/bsw@0 | 933 // NOTE: "position" and "pg_internal_position" are recalculated to |
jbe/bsw@0 | 934 // byte offsets, as Lua 5.1 is not Unicode aware. |
jbe/bsw@0 | 935 { |
jbe/bsw@0 | 936 char *tmp; |
jbe/bsw@0 | 937 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION); |
jbe/bsw@0 | 938 if (tmp) { |
jbe/bsw@0 | 939 int pos; |
jbe/bsw@0 | 940 pos = atoi(tmp) - 1; |
jbe/bsw@0 | 941 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) { |
jbe/bsw@0 | 942 pos = utf8_position_to_byte(command, pos); |
jbe/bsw@0 | 943 } |
jbe/bsw@0 | 944 lua_pushinteger(L, pos + 1); |
jbe/bsw@0 | 945 lua_setfield(L, 5, "position"); |
jbe/bsw@0 | 946 } |
jbe/bsw@0 | 947 } |
jbe/bsw@0 | 948 { |
jbe/bsw@0 | 949 const char *internal_query; |
jbe/bsw@0 | 950 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY); |
jbe/bsw@0 | 951 lua_pushstring(L, internal_query); |
jbe/bsw@0 | 952 lua_setfield(L, 5, "pg_internal_query"); |
jbe/bsw@0 | 953 char *tmp; |
jbe/bsw@0 | 954 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION); |
jbe/bsw@0 | 955 if (tmp) { |
jbe/bsw@0 | 956 int pos; |
jbe/bsw@0 | 957 pos = atoi(tmp) - 1; |
jbe/bsw@0 | 958 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) { |
jbe/bsw@0 | 959 pos = utf8_position_to_byte(internal_query, pos); |
jbe/bsw@0 | 960 } |
jbe/bsw@0 | 961 lua_pushinteger(L, pos + 1); |
jbe/bsw@0 | 962 lua_setfield(L, 5, "pg_internal_position"); |
jbe/bsw@0 | 963 } |
jbe/bsw@0 | 964 } |
jbe/bsw@0 | 965 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT)); |
jbe/bsw@0 | 966 lua_setfield(L, 5, "pg_context"); |
jbe/bsw@0 | 967 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE)); |
jbe/bsw@0 | 968 lua_setfield(L, 5, "pg_source_file"); |
jbe/bsw@0 | 969 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE)); |
jbe/bsw@0 | 970 lua_setfield(L, 5, "pg_source_line"); |
jbe/bsw@0 | 971 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION)); |
jbe/bsw@0 | 972 lua_setfield(L, 5, "pg_source_function"); |
jbe/bsw@0 | 973 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) { |
jbe/bsw@0 | 974 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS); |
jbe/bsw@0 | 975 lua_setfield(L, 5, "code"); |
jbe/bsw@0 | 976 lua_pushliteral(L, "Expected one row, but got empty set."); |
jbe/bsw@0 | 977 lua_setfield(L, 5, "message"); |
jbe/bsw@0 | 978 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) { |
jbe/bsw@0 | 979 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS); |
jbe/bsw@0 | 980 lua_setfield(L, 5, "code"); |
jbe/bsw@0 | 981 lua_pushliteral(L, "Got more than one result row."); |
jbe/bsw@0 | 982 lua_setfield(L, 5, "message"); |
jbe/bsw@0 | 983 } else { |
jbe/bsw@0 | 984 // should not happen |
jbe/bsw@0 | 985 abort(); |
jbe/bsw@0 | 986 } |
jbe/bsw@0 | 987 if (res) { |
jbe/bsw@0 | 988 PQclear(res); |
jbe/bsw@0 | 989 while ((res = PQgetResult(conn->pgconn))) PQclear(res); |
jbe/bsw@0 | 990 } |
jbe/bsw@0 | 991 if (lua_toboolean(L, 3)) { |
jbe/bsw@0 | 992 lua_pushvalue(L, 3); |
jbe/bsw@0 | 993 lua_pushvalue(L, 5); |
jbe/bsw@0 | 994 lua_call(L, 1, 0); |
jbe/bsw@0 | 995 } |
jbe/bsw@0 | 996 return 1; |
jbe/bsw@0 | 997 } |
jbe@23 | 998 // call "create_list" or "create_object" method of database handle, |
jbe@23 | 999 // result will be at stack position 5: |
jbe/bsw@0 | 1000 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) { |
jbe/bsw@0 | 1001 lua_pushcfunction(L, mondelefant_conn_create_list); // 5 |
jbe/bsw@0 | 1002 lua_pushvalue(L, 1); // 6 |
jbe/bsw@0 | 1003 lua_call(L, 1, 1); // 5 |
jbe/bsw@0 | 1004 } else { |
jbe/bsw@0 | 1005 lua_pushcfunction(L, mondelefant_conn_create_object); // 5 |
jbe/bsw@0 | 1006 lua_pushvalue(L, 1); // 6 |
jbe/bsw@0 | 1007 lua_call(L, 1, 1); // 5 |
jbe/bsw@0 | 1008 } |
jbe@23 | 1009 // set "_column_info": |
jbe@23 | 1010 lua_newtable(L); // 6 |
jbe/bsw@0 | 1011 for (col = 0; col < cols; col++) { |
jbe/bsw@0 | 1012 lua_newtable(L); // 7 |
jbe/bsw@0 | 1013 lua_pushstring(L, PQfname(res, col)); |
jbe/bsw@0 | 1014 lua_setfield(L, 7, "field_name"); |
jbe/bsw@0 | 1015 { |
jbe/bsw@0 | 1016 Oid tmp; |
jbe/bsw@0 | 1017 tmp = PQftable(res, col); |
jbe/bsw@0 | 1018 if (tmp == InvalidOid) lua_pushnil(L); |
jbe/bsw@0 | 1019 else lua_pushinteger(L, tmp); |
jbe/bsw@0 | 1020 lua_setfield(L, 7, "table_oid"); |
jbe/bsw@0 | 1021 } |
jbe/bsw@0 | 1022 { |
jbe/bsw@0 | 1023 int tmp; |
jbe/bsw@0 | 1024 tmp = PQftablecol(res, col); |
jbe/bsw@0 | 1025 if (tmp == 0) lua_pushnil(L); |
jbe/bsw@0 | 1026 else lua_pushinteger(L, tmp); |
jbe/bsw@0 | 1027 lua_setfield(L, 7, "table_column_number"); |
jbe/bsw@0 | 1028 } |
jbe/bsw@0 | 1029 { |
jbe/bsw@0 | 1030 Oid tmp; |
jbe/bsw@0 | 1031 tmp = PQftype(res, col); |
jbe/bsw@0 | 1032 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID); |
jbe/bsw@0 | 1033 lua_pushinteger(L, tmp); |
jbe/bsw@0 | 1034 lua_setfield(L, 7, "type_oid"); |
jbe/bsw@0 | 1035 lua_pushstring(L, mondelefant_oid_to_typestr(tmp)); |
jbe/bsw@0 | 1036 lua_setfield(L, 7, "type"); |
jbe/bsw@0 | 1037 } |
jbe/bsw@0 | 1038 { |
jbe/bsw@0 | 1039 int tmp; |
jbe/bsw@0 | 1040 tmp = PQfmod(res, col); |
jbe/bsw@0 | 1041 if (tmp == -1) lua_pushnil(L); |
jbe/bsw@0 | 1042 else lua_pushinteger(L, tmp); |
jbe/bsw@0 | 1043 lua_setfield(L, 7, "type_modifier"); |
jbe/bsw@0 | 1044 } |
jbe/bsw@0 | 1045 lua_rawseti(L, 6, col+1); |
jbe/bsw@0 | 1046 } |
jbe@23 | 1047 lua_setfield(L, 5, "_column_info"); |
jbe@23 | 1048 // set "_rows_affected": |
jbe/bsw@0 | 1049 { |
jbe/bsw@0 | 1050 char *tmp; |
jbe/bsw@0 | 1051 tmp = PQcmdTuples(res); |
jbe/bsw@0 | 1052 if (tmp[0]) { |
jbe/bsw@0 | 1053 lua_pushinteger(L, atoi(tmp)); |
jbe/bsw@0 | 1054 lua_setfield(L, 5, "_rows_affected"); |
jbe/bsw@0 | 1055 } |
jbe/bsw@0 | 1056 } |
jbe@23 | 1057 // set "_oid": |
jbe/bsw@0 | 1058 { |
jbe/bsw@0 | 1059 Oid tmp; |
jbe/bsw@0 | 1060 tmp = PQoidValue(res); |
jbe/bsw@0 | 1061 if (tmp != InvalidOid) { |
jbe/bsw@0 | 1062 lua_pushinteger(L, tmp); |
jbe/bsw@0 | 1063 lua_setfield(L, 5, "_oid"); |
jbe/bsw@0 | 1064 } |
jbe/bsw@0 | 1065 } |
jbe@23 | 1066 // copy data as strings or nil, while performing binary unescaping |
jbe@23 | 1067 // automatically: |
jbe/bsw@0 | 1068 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) { |
jbe/bsw@0 | 1069 for (row = 0; row < rows; row++) { |
jbe/bsw@0 | 1070 lua_pushcfunction(L, mondelefant_conn_create_object); // 6 |
jbe/bsw@0 | 1071 lua_pushvalue(L, 1); // 7 |
jbe/bsw@0 | 1072 lua_call(L, 1, 1); // 6 |
jbe/bsw@0 | 1073 for (col = 0; col < cols; col++) { |
jbe/bsw@0 | 1074 if (PQgetisnull(res, row, col)) { |
jbe/bsw@0 | 1075 lua_pushnil(L); |
jbe/bsw@0 | 1076 } else if (binary[col]) { |
jbe/bsw@0 | 1077 size_t binlen; |
jbe/bsw@0 | 1078 char *binval; |
jbe/bsw@0 | 1079 binval = (char *)PQunescapeBytea( |
jbe/bsw@0 | 1080 (unsigned char *)PQgetvalue(res, row, col), &binlen |
jbe/bsw@0 | 1081 ); |
jbe/bsw@0 | 1082 if (!binval) { |
jbe/bsw@0 | 1083 return luaL_error(L, |
jbe/bsw@0 | 1084 "Could not allocate memory for binary unescaping." |
jbe/bsw@0 | 1085 ); |
jbe/bsw@0 | 1086 } |
jbe/bsw@0 | 1087 lua_pushlstring(L, binval, binlen); |
jbe/bsw@0 | 1088 PQfreemem(binval); |
jbe/bsw@0 | 1089 } else { |
jbe/bsw@0 | 1090 lua_pushstring(L, PQgetvalue(res, row, col)); |
jbe/bsw@0 | 1091 } |
jbe/bsw@0 | 1092 lua_rawseti(L, 6, col+1); |
jbe/bsw@0 | 1093 } |
jbe/bsw@0 | 1094 lua_rawseti(L, 5, row+1); |
jbe/bsw@0 | 1095 } |
jbe/bsw@0 | 1096 } else if (rows == 1) { |
jbe/bsw@0 | 1097 for (col = 0; col < cols; col++) { |
jbe/bsw@0 | 1098 if (PQgetisnull(res, 0, col)) { |
jbe/bsw@0 | 1099 lua_pushnil(L); |
jbe/bsw@0 | 1100 } else if (binary[col]) { |
jbe/bsw@0 | 1101 size_t binlen; |
jbe/bsw@0 | 1102 char *binval; |
jbe/bsw@0 | 1103 binval = (char *)PQunescapeBytea( |
jbe/bsw@0 | 1104 (unsigned char *)PQgetvalue(res, 0, col), &binlen |
jbe/bsw@0 | 1105 ); |
jbe/bsw@0 | 1106 if (!binval) { |
jbe/bsw@0 | 1107 return luaL_error(L, |
jbe/bsw@0 | 1108 "Could not allocate memory for binary unescaping." |
jbe/bsw@0 | 1109 ); |
jbe/bsw@0 | 1110 } |
jbe/bsw@0 | 1111 lua_pushlstring(L, binval, binlen); |
jbe/bsw@0 | 1112 PQfreemem(binval); |
jbe/bsw@0 | 1113 } else { |
jbe/bsw@0 | 1114 lua_pushstring(L, PQgetvalue(res, 0, col)); |
jbe/bsw@0 | 1115 } |
jbe/bsw@0 | 1116 lua_rawseti(L, 5, col+1); |
jbe/bsw@0 | 1117 } |
jbe/bsw@0 | 1118 } else { |
jbe/bsw@0 | 1119 // no row in optrow mode |
jbe/bsw@0 | 1120 lua_pop(L, 1); |
jbe/bsw@0 | 1121 lua_pushnil(L); |
jbe/bsw@0 | 1122 } |
jbe@23 | 1123 // save result in result list: |
jbe/bsw@0 | 1124 lua_rawseti(L, 4, command_idx+1); |
jbe@23 | 1125 // extra assertion: |
jbe/bsw@0 | 1126 if (lua_gettop(L) != 4) abort(); // should not happen |
jbe@23 | 1127 // free memory acquired by libpq: |
jbe/bsw@0 | 1128 PQclear(res); |
jbe/bsw@0 | 1129 } |
jbe/bsw@0 | 1130 // trace callback at stack position 3 |
jbe/bsw@0 | 1131 // result at stack position 4 (top of stack) |
jbe@23 | 1132 // if a trace callback is existent, then call: |
jbe/bsw@0 | 1133 if (lua_toboolean(L, 3)) { |
jbe/bsw@0 | 1134 lua_pushvalue(L, 3); |
jbe/bsw@0 | 1135 lua_call(L, 0, 0); |
jbe/bsw@0 | 1136 } |
jbe@23 | 1137 // put result at stack position 3: |
jbe@23 | 1138 lua_replace(L, 3); |
jbe@23 | 1139 // get output converter to stack position 4: |
jbe@23 | 1140 lua_getfield(L, 1, "output_converter"); |
jbe@23 | 1141 // apply output converters and fill "_data" table according to column names: |
jbe/bsw@0 | 1142 for (command_idx = 0; command_idx < command_count; command_idx++) { |
jbe/bsw@0 | 1143 int mode; |
jbe/bsw@0 | 1144 mode = modes[command_idx]; |
jbe/bsw@0 | 1145 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 5 |
jbe/bsw@0 | 1146 if (lua_toboolean(L, 5)) { |
jbe/bsw@0 | 1147 lua_getfield(L, 5, "_column_info"); // column_info list at position 6 |
jbe@64 | 1148 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1149 cols = lua_rawlen(L, 6); |
jbe@64 | 1150 #else |
jbe/bsw@0 | 1151 cols = lua_objlen(L, 6); |
jbe@64 | 1152 #endif |
jbe/bsw@0 | 1153 if (mode == MONDELEFANT_QUERY_MODE_LIST) { |
jbe@64 | 1154 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1155 rows = lua_rawlen(L, 5); |
jbe@64 | 1156 #else |
jbe/bsw@0 | 1157 rows = lua_objlen(L, 5); |
jbe@64 | 1158 #endif |
jbe/bsw@0 | 1159 for (row = 0; row < rows; row++) { |
jbe/bsw@0 | 1160 lua_rawgeti(L, 5, row+1); // row at stack position 7 |
jbe/bsw@0 | 1161 lua_getfield(L, 7, "_data"); // _data table at stack position 8 |
jbe/bsw@0 | 1162 for (col = 0; col < cols; col++) { |
jbe/bsw@0 | 1163 lua_rawgeti(L, 6, col+1); // this column info at position 9 |
jbe/bsw@0 | 1164 lua_getfield(L, 9, "field_name"); // 10 |
jbe/bsw@0 | 1165 if (lua_toboolean(L, 4)) { |
jbe/bsw@0 | 1166 lua_pushvalue(L, 4); // output-converter |
jbe/bsw@0 | 1167 lua_pushvalue(L, 1); // connection |
jbe/bsw@0 | 1168 lua_rawgeti(L, 7, col+1); // raw-value |
jbe/bsw@0 | 1169 lua_pushvalue(L, 9); // this column info |
jbe/bsw@0 | 1170 lua_call(L, 3, 1); // converted value at position 11 |
jbe/bsw@0 | 1171 } else { |
jbe/bsw@0 | 1172 lua_rawgeti(L, 7, col+1); // raw-value at position 11 |
jbe/bsw@0 | 1173 } |
jbe/bsw@0 | 1174 lua_pushvalue(L, 11); // 12 |
jbe/bsw@0 | 1175 lua_rawseti(L, 7, col+1); |
jbe/bsw@0 | 1176 lua_rawset(L, 8); |
jbe/bsw@0 | 1177 lua_settop(L, 8); |
jbe/bsw@0 | 1178 } |
jbe/bsw@0 | 1179 lua_settop(L, 6); |
jbe/bsw@0 | 1180 } |
jbe/bsw@0 | 1181 } else { |
jbe/bsw@0 | 1182 lua_getfield(L, 5, "_data"); // _data table at stack position 7 |
jbe/bsw@0 | 1183 for (col = 0; col < cols; col++) { |
jbe/bsw@0 | 1184 lua_rawgeti(L, 6, col+1); // this column info at position 8 |
jbe/bsw@0 | 1185 lua_getfield(L, 8, "field_name"); // 9 |
jbe/bsw@0 | 1186 if (lua_toboolean(L, 4)) { |
jbe/bsw@0 | 1187 lua_pushvalue(L, 4); // output-converter |
jbe/bsw@0 | 1188 lua_pushvalue(L, 1); // connection |
jbe/bsw@0 | 1189 lua_rawgeti(L, 5, col+1); // raw-value |
jbe/bsw@0 | 1190 lua_pushvalue(L, 8); // this column info |
jbe/bsw@0 | 1191 lua_call(L, 3, 1); // converted value at position 10 |
jbe/bsw@0 | 1192 } else { |
jbe/bsw@0 | 1193 lua_rawgeti(L, 5, col+1); // raw-value at position 10 |
jbe/bsw@0 | 1194 } |
jbe/bsw@0 | 1195 lua_pushvalue(L, 10); // 11 |
jbe/bsw@0 | 1196 lua_rawseti(L, 5, col+1); |
jbe/bsw@0 | 1197 lua_rawset(L, 7); |
jbe/bsw@0 | 1198 lua_settop(L, 7); |
jbe/bsw@0 | 1199 } |
jbe/bsw@0 | 1200 } |
jbe/bsw@0 | 1201 } |
jbe/bsw@0 | 1202 lua_settop(L, 4); |
jbe/bsw@0 | 1203 } |
jbe@23 | 1204 // return nil as first result value, followed by result lists/objects: |
jbe/bsw@0 | 1205 lua_settop(L, 3); |
jbe/bsw@0 | 1206 lua_pushnil(L); |
jbe/bsw@0 | 1207 for (command_idx = 0; command_idx < command_count; command_idx++) { |
jbe/bsw@0 | 1208 lua_rawgeti(L, 3, command_idx+1); |
jbe/bsw@0 | 1209 } |
jbe/bsw@0 | 1210 return command_count+1; |
jbe/bsw@0 | 1211 } |
jbe/bsw@0 | 1212 |
jbe@23 | 1213 // method "escalate" of error objects: |
jbe/bsw@0 | 1214 static int mondelefant_errorobject_escalate(lua_State *L) { |
jbe@23 | 1215 // check, if we may throw an error object instead of an error string: |
jbe/bsw@0 | 1216 lua_settop(L, 1); |
jbe/bsw@0 | 1217 lua_getfield(L, 1, "connection"); // 2 |
jbe/bsw@0 | 1218 lua_getfield(L, 2, "error_objects"); // 3 |
jbe/bsw@0 | 1219 if (lua_toboolean(L, 3)) { |
jbe@23 | 1220 // throw error object: |
jbe/bsw@0 | 1221 lua_settop(L, 1); |
jbe/bsw@0 | 1222 return lua_error(L); |
jbe/bsw@0 | 1223 } else { |
jbe@23 | 1224 // throw error string: |
jbe/bsw@0 | 1225 lua_getfield(L, 1, "message"); // 4 |
jbe/bsw@0 | 1226 if (lua_isnil(L, 4)) { |
jbe/bsw@0 | 1227 return luaL_error(L, "No error message given for escalation."); |
jbe/bsw@0 | 1228 } |
jbe/bsw@0 | 1229 return lua_error(L); |
jbe/bsw@0 | 1230 } |
jbe/bsw@0 | 1231 } |
jbe/bsw@0 | 1232 |
jbe@23 | 1233 // method "is_kind_of" of error objects: |
jbe/bsw@0 | 1234 static int mondelefant_errorobject_is_kind_of(lua_State *L) { |
jbe/bsw@0 | 1235 lua_settop(L, 2); |
jbe/bsw@0 | 1236 lua_getfield(L, 1, "code"); // 3 |
jbe/bsw@0 | 1237 if (lua_isstring(L, 3)) { |
jbe/bsw@0 | 1238 lua_pushboolean(L, |
jbe/bsw@0 | 1239 mondelefant_check_error_class( |
jbe/bsw@0 | 1240 lua_tostring(L, 3), luaL_checkstring(L, 2) |
jbe/bsw@0 | 1241 ) |
jbe/bsw@0 | 1242 ); |
jbe/bsw@0 | 1243 } else { |
jbe/bsw@0 | 1244 // only happens for errors where code is not set |
jbe/bsw@0 | 1245 lua_pushboolean(L, 0); |
jbe/bsw@0 | 1246 } |
jbe/bsw@0 | 1247 return 1; |
jbe/bsw@0 | 1248 } |
jbe/bsw@0 | 1249 |
jbe@23 | 1250 // method "query" of database handles: |
jbe/bsw@0 | 1251 static int mondelefant_conn_query(lua_State *L) { |
jbe/bsw@0 | 1252 int argc; |
jbe@23 | 1253 // count number of arguments: |
jbe/bsw@0 | 1254 argc = lua_gettop(L); |
jbe@23 | 1255 // insert "try_query" function/method at stack position 1: |
jbe/bsw@0 | 1256 lua_pushcfunction(L, mondelefant_conn_try_query); |
jbe@23 | 1257 lua_insert(L, 1); |
jbe@23 | 1258 // call "try_query" method: |
jbe@23 | 1259 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1 |
jbe@23 | 1260 // check, if error occurred: |
jbe@23 | 1261 if (lua_toboolean(L, 1)) { |
jbe@23 | 1262 // invoke escalate method of error object: |
jbe/bsw@0 | 1263 lua_pushcfunction(L, mondelefant_errorobject_escalate); |
jbe@23 | 1264 lua_pushvalue(L, 1); |
jbe/bsw@0 | 1265 lua_call(L, 1, 0); // will raise an error |
jbe/bsw@0 | 1266 return 0; // should not be executed |
jbe/bsw@0 | 1267 } else { |
jbe@23 | 1268 // return everything but nil error object: |
jbe@23 | 1269 return lua_gettop(L) - 1; |
jbe/bsw@0 | 1270 } |
jbe/bsw@0 | 1271 } |
jbe/bsw@0 | 1272 |
jbe@23 | 1273 // library function "set_class": |
jbe/bsw@0 | 1274 static int mondelefant_set_class(lua_State *L) { |
jbe@23 | 1275 // ensure that first argument is a database result list/object: |
jbe/bsw@0 | 1276 lua_settop(L, 2); |
jbe/bsw@0 | 1277 lua_getmetatable(L, 1); // 3 |
jbe/bsw@0 | 1278 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4 |
jbe@64 | 1279 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1280 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result"); |
jbe@64 | 1281 #else |
jbe/bsw@0 | 1282 luaL_argcheck(L, lua_equal(L, 3, 4), 1, "not a database result"); |
jbe@64 | 1283 #endif |
jbe@23 | 1284 // ensure that second argument is a database class (model): |
jbe/bsw@0 | 1285 lua_settop(L, 2); |
jbe/bsw@0 | 1286 lua_getmetatable(L, 2); // 3 |
jbe/bsw@0 | 1287 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4 |
jbe@64 | 1288 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1289 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class"); |
jbe@64 | 1290 #else |
jbe/bsw@0 | 1291 luaL_argcheck(L, lua_equal(L, 3, 4), 2, "not a database class"); |
jbe@64 | 1292 #endif |
jbe@23 | 1293 // set attribute "_class" of result list/object to given class: |
jbe/bsw@0 | 1294 lua_settop(L, 2); |
jbe/bsw@0 | 1295 lua_pushvalue(L, 2); // 3 |
jbe/bsw@0 | 1296 lua_setfield(L, 1, "_class"); |
jbe@23 | 1297 // test, if database result is a list (and not a single object): |
jbe/bsw@0 | 1298 lua_getfield(L, 1, "_type"); // 3 |
jbe/bsw@0 | 1299 lua_pushliteral(L, "list"); // 4 |
jbe/bsw@0 | 1300 if (lua_rawequal(L, 3, 4)) { |
jbe/bsw@0 | 1301 int i; |
jbe@23 | 1302 // set attribute "_class" of all elements to given class: |
jbe@64 | 1303 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1304 for (i=0; i < lua_rawlen(L, 1); i++) { |
jbe@64 | 1305 #else |
jbe/bsw@0 | 1306 for (i=0; i < lua_objlen(L, 1); i++) { |
jbe@64 | 1307 #endif |
jbe/bsw@0 | 1308 lua_settop(L, 2); |
jbe/bsw@0 | 1309 lua_rawgeti(L, 1, i+1); // 3 |
jbe/bsw@0 | 1310 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1311 lua_setfield(L, 3, "_class"); |
jbe/bsw@0 | 1312 } |
jbe/bsw@0 | 1313 } |
jbe@23 | 1314 // return first argument: |
jbe/bsw@0 | 1315 lua_settop(L, 1); |
jbe/bsw@0 | 1316 return 1; |
jbe/bsw@0 | 1317 } |
jbe/bsw@0 | 1318 |
jbe@23 | 1319 // library function "new_class": |
jbe/bsw@0 | 1320 static int mondelefant_new_class(lua_State *L) { |
jbe@23 | 1321 // use first argument as template or create new table: |
jbe/bsw@0 | 1322 lua_settop(L, 1); |
jbe/bsw@0 | 1323 if (!lua_toboolean(L, 1)) { |
jbe/bsw@0 | 1324 lua_settop(L, 0); |
jbe/bsw@0 | 1325 lua_newtable(L); // 1 |
jbe/bsw@0 | 1326 } |
jbe@23 | 1327 // set meta-table for database classes (models): |
jbe/bsw@0 | 1328 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 2 |
jbe/bsw@0 | 1329 lua_setmetatable(L, 1); |
jbe@23 | 1330 // check, if "prototype" attribute is not set: |
jbe/bsw@0 | 1331 lua_pushliteral(L, "prototype"); // 2 |
jbe/bsw@0 | 1332 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1333 if (!lua_toboolean(L, 2)) { |
jbe@23 | 1334 // set "prototype" attribute to default prototype: |
jbe/bsw@0 | 1335 lua_pushliteral(L, "prototype"); // 3 |
jbe/bsw@0 | 1336 lua_getfield(L, |
jbe/bsw@0 | 1337 LUA_REGISTRYINDEX, |
jbe/bsw@0 | 1338 MONDELEFANT_CLASS_PROTO_REGKEY |
jbe/bsw@0 | 1339 ); // 4 |
jbe/bsw@0 | 1340 lua_rawset(L, 1); |
jbe/bsw@0 | 1341 } |
jbe@23 | 1342 // set "object" attribute to empty table, unless it is already set: |
jbe/bsw@0 | 1343 lua_settop(L, 1); |
jbe/bsw@0 | 1344 lua_pushliteral(L, "object"); // 2 |
jbe/bsw@0 | 1345 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1346 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 1347 lua_pushliteral(L, "object"); // 3 |
jbe/bsw@0 | 1348 lua_newtable(L); // 4 |
jbe/bsw@0 | 1349 lua_rawset(L, 1); |
jbe/bsw@0 | 1350 } |
jbe@23 | 1351 // set "object_get" attribute to empty table, unless it is already set: |
jbe/bsw@0 | 1352 lua_settop(L, 1); |
jbe/bsw@0 | 1353 lua_pushliteral(L, "object_get"); // 2 |
jbe/bsw@0 | 1354 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1355 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 1356 lua_pushliteral(L, "object_get"); // 3 |
jbe/bsw@0 | 1357 lua_newtable(L); // 4 |
jbe/bsw@0 | 1358 lua_rawset(L, 1); |
jbe/bsw@0 | 1359 } |
jbe@23 | 1360 // set "object_set" attribute to empty table, unless it is already set: |
jbe/bsw@0 | 1361 lua_settop(L, 1); |
jbe/bsw@0 | 1362 lua_pushliteral(L, "object_set"); // 2 |
jbe/bsw@0 | 1363 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1364 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 1365 lua_pushliteral(L, "object_set"); // 3 |
jbe/bsw@0 | 1366 lua_newtable(L); // 4 |
jbe/bsw@0 | 1367 lua_rawset(L, 1); |
jbe/bsw@0 | 1368 } |
jbe@23 | 1369 // set "list" attribute to empty table, unless it is already set: |
jbe/bsw@0 | 1370 lua_settop(L, 1); |
jbe/bsw@0 | 1371 lua_pushliteral(L, "list"); // 2 |
jbe/bsw@0 | 1372 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1373 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 1374 lua_pushliteral(L, "list"); // 3 |
jbe/bsw@0 | 1375 lua_newtable(L); // 4 |
jbe/bsw@0 | 1376 lua_rawset(L, 1); |
jbe/bsw@0 | 1377 } |
jbe@23 | 1378 // set "references" attribute to empty table, unless it is already set: |
jbe/bsw@0 | 1379 lua_settop(L, 1); |
jbe/bsw@0 | 1380 lua_pushliteral(L, "references"); // 2 |
jbe/bsw@0 | 1381 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1382 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 1383 lua_pushliteral(L, "references"); // 3 |
jbe/bsw@0 | 1384 lua_newtable(L); // 4 |
jbe/bsw@0 | 1385 lua_rawset(L, 1); |
jbe/bsw@0 | 1386 } |
jbe@23 | 1387 // set "foreign_keys" attribute to empty table, unless it is already set: |
jbe/bsw@0 | 1388 lua_settop(L, 1); |
jbe/bsw@0 | 1389 lua_pushliteral(L, "foreign_keys"); // 2 |
jbe/bsw@0 | 1390 lua_rawget(L, 1); // 2 |
jbe/bsw@0 | 1391 if (!lua_toboolean(L, 2)) { |
jbe/bsw@0 | 1392 lua_pushliteral(L, "foreign_keys"); // 3 |
jbe/bsw@0 | 1393 lua_newtable(L); // 4 |
jbe/bsw@0 | 1394 lua_rawset(L, 1); |
jbe/bsw@0 | 1395 } |
jbe@23 | 1396 // return table: |
jbe/bsw@0 | 1397 lua_settop(L, 1); |
jbe/bsw@0 | 1398 return 1; |
jbe/bsw@0 | 1399 } |
jbe/bsw@0 | 1400 |
jbe@23 | 1401 // method "get_reference" of classes (models): |
jbe/bsw@0 | 1402 static int mondelefant_class_get_reference(lua_State *L) { |
jbe/bsw@0 | 1403 lua_settop(L, 2); |
jbe/bsw@0 | 1404 while (lua_toboolean(L, 1)) { |
jbe@23 | 1405 // get "references" table: |
jbe/bsw@0 | 1406 lua_getfield(L, 1, "references"); // 3 |
jbe@23 | 1407 // perform lookup: |
jbe/bsw@0 | 1408 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1409 lua_gettable(L, 3); // 4 |
jbe@23 | 1410 // return result, if lookup was successful: |
jbe/bsw@0 | 1411 if (!lua_isnil(L, 4)) return 1; |
jbe@23 | 1412 // replace current table by its prototype: |
jbe/bsw@0 | 1413 lua_settop(L, 2); |
jbe/bsw@0 | 1414 lua_pushliteral(L, "prototype"); // 3 |
jbe/bsw@0 | 1415 lua_rawget(L, 1); // 3 |
jbe/bsw@0 | 1416 lua_replace(L, 1); |
jbe/bsw@0 | 1417 } |
jbe@23 | 1418 // return nothing: |
jbe/bsw@0 | 1419 return 0; |
jbe/bsw@0 | 1420 } |
jbe/bsw@0 | 1421 |
jbe@23 | 1422 // method "iterate_over_references" of classes (models): |
jbe/bsw@0 | 1423 static int mondelefant_class_iterate_over_references(lua_State *L) { |
jbe/bsw@0 | 1424 return luaL_error(L, "Reference iterator not implemented yet."); // TODO |
jbe/bsw@0 | 1425 } |
jbe/bsw@0 | 1426 |
jbe@23 | 1427 // method "get_foreign_key_reference_name" of classes (models): |
jbe/bsw@0 | 1428 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) { |
jbe/bsw@0 | 1429 lua_settop(L, 2); |
jbe/bsw@0 | 1430 while (lua_toboolean(L, 1)) { |
jbe@23 | 1431 // get "foreign_keys" table: |
jbe/bsw@0 | 1432 lua_getfield(L, 1, "foreign_keys"); // 3 |
jbe@23 | 1433 // perform lookup: |
jbe/bsw@0 | 1434 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1435 lua_gettable(L, 3); // 4 |
jbe@23 | 1436 // return result, if lookup was successful: |
jbe/bsw@0 | 1437 if (!lua_isnil(L, 4)) return 1; |
jbe@23 | 1438 // replace current table by its prototype: |
jbe/bsw@0 | 1439 lua_settop(L, 2); |
jbe/bsw@0 | 1440 lua_pushliteral(L, "prototype"); // 3 |
jbe/bsw@0 | 1441 lua_rawget(L, 1); // 3 |
jbe/bsw@0 | 1442 lua_replace(L, 1); |
jbe/bsw@0 | 1443 } |
jbe@23 | 1444 // return nothing: |
jbe/bsw@0 | 1445 return 0; |
jbe/bsw@0 | 1446 } |
jbe/bsw@0 | 1447 |
jbe@23 | 1448 // meta-method "__index" of database result lists and objects: |
jbe/bsw@0 | 1449 static int mondelefant_result_index(lua_State *L) { |
jbe/bsw@0 | 1450 const char *result_type; |
jbe@23 | 1451 // only lookup, when key is a string not beginning with an underscore: |
jbe/bsw@0 | 1452 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') { |
jbe@23 | 1453 return 0; |
jbe/bsw@0 | 1454 } |
jbe@23 | 1455 // get value of "_class" attribute, or default class, when unset: |
jbe@23 | 1456 lua_settop(L, 2); |
jbe/bsw@0 | 1457 lua_getfield(L, 1, "_class"); // 3 |
jbe/bsw@0 | 1458 if (!lua_toboolean(L, 3)) { |
jbe/bsw@0 | 1459 lua_settop(L, 2); |
jbe/bsw@0 | 1460 lua_getfield(L, |
jbe/bsw@0 | 1461 LUA_REGISTRYINDEX, |
jbe/bsw@0 | 1462 MONDELEFANT_CLASS_PROTO_REGKEY |
jbe/bsw@0 | 1463 ); // 3 |
jbe/bsw@0 | 1464 } |
jbe@23 | 1465 // get value of "_type" attribute: |
jbe/bsw@0 | 1466 lua_getfield(L, 1, "_type"); // 4 |
jbe/bsw@0 | 1467 result_type = lua_tostring(L, 4); |
jbe@23 | 1468 // different lookup for lists and objects: |
jbe@23 | 1469 if (result_type && !strcmp(result_type, "object")) { // object |
jbe/bsw@0 | 1470 lua_settop(L, 3); |
jbe/bsw@0 | 1471 // try inherited attributes, methods or getter functions: |
jbe/bsw@0 | 1472 while (lua_toboolean(L, 3)) { |
jbe/bsw@0 | 1473 lua_getfield(L, 3, "object"); // 4 |
jbe/bsw@0 | 1474 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1475 lua_gettable(L, 4); // 5 |
jbe/bsw@0 | 1476 if (!lua_isnil(L, 5)) return 1; |
jbe/bsw@0 | 1477 lua_settop(L, 3); |
jbe/bsw@0 | 1478 lua_getfield(L, 3, "object_get"); // 4 |
jbe/bsw@0 | 1479 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1480 lua_gettable(L, 4); // 5 |
jbe/bsw@0 | 1481 if (lua_toboolean(L, 5)) { |
jbe/bsw@0 | 1482 lua_pushvalue(L, 1); // 6 |
jbe/bsw@0 | 1483 lua_call(L, 1, 1); // 5 |
jbe/bsw@0 | 1484 return 1; |
jbe/bsw@0 | 1485 } |
jbe/bsw@0 | 1486 lua_settop(L, 3); |
jbe/bsw@0 | 1487 lua_pushliteral(L, "prototype"); // 4 |
jbe/bsw@0 | 1488 lua_rawget(L, 3); // 4 |
jbe/bsw@0 | 1489 lua_replace(L, 3); |
jbe/bsw@0 | 1490 } |
jbe/bsw@0 | 1491 lua_settop(L, 2); |
jbe/bsw@0 | 1492 // try primary keys of referenced objects: |
jbe/bsw@0 | 1493 lua_pushcfunction(L, |
jbe/bsw@0 | 1494 mondelefant_class_get_foreign_key_reference_name |
jbe/bsw@0 | 1495 ); // 3 |
jbe/bsw@0 | 1496 lua_getfield(L, 1, "_class"); // 4 |
jbe/bsw@0 | 1497 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1498 lua_call(L, 2, 1); // 3 |
jbe/bsw@0 | 1499 if (!lua_isnil(L, 3)) { |
jbe/bsw@0 | 1500 // reference name at stack position 3 |
jbe/bsw@0 | 1501 lua_pushcfunction(L, mondelefant_class_get_reference); // 4 |
jbe/bsw@0 | 1502 lua_getfield(L, 1, "_class"); // 5 |
jbe/bsw@0 | 1503 lua_pushvalue(L, 3); // 6 |
jbe/bsw@0 | 1504 lua_call(L, 2, 1); // reference info at stack position 4 |
jbe/bsw@0 | 1505 lua_getfield(L, 1, "_ref"); // 5 |
jbe/bsw@0 | 1506 lua_getfield(L, 4, "ref"); // 6 |
jbe/bsw@0 | 1507 lua_gettable(L, 5); // 6 |
jbe/bsw@0 | 1508 if (!lua_isnil(L, 6)) { |
jbe/bsw@0 | 1509 if (lua_toboolean(L, 6)) { |
jbe/bsw@0 | 1510 lua_getfield(L, 4, "that_key"); // 7 |
jbe/bsw@0 | 1511 if (lua_isnil(L, 7)) { |
jbe/bsw@0 | 1512 return luaL_error(L, "Missing 'that_key' entry in model reference."); |
jbe/bsw@0 | 1513 } |
jbe/bsw@0 | 1514 lua_gettable(L, 6); // 7 |
jbe/bsw@0 | 1515 } else { |
jbe/bsw@0 | 1516 lua_pushnil(L); |
jbe/bsw@0 | 1517 } |
jbe/bsw@0 | 1518 return 1; |
jbe/bsw@0 | 1519 } |
jbe/bsw@0 | 1520 } |
jbe/bsw@0 | 1521 lua_settop(L, 2); |
jbe/bsw@0 | 1522 // try normal data field info: |
jbe/bsw@0 | 1523 lua_getfield(L, 1, "_data"); // 3 |
jbe/bsw@0 | 1524 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1525 lua_gettable(L, 3); // 4 |
jbe/bsw@0 | 1526 if (!lua_isnil(L, 4)) return 1; |
jbe/bsw@0 | 1527 lua_settop(L, 2); |
jbe/bsw@0 | 1528 // try cached referenced object (or cached NULL reference): |
jbe/bsw@0 | 1529 lua_getfield(L, 1, "_ref"); // 3 |
jbe/bsw@0 | 1530 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1531 lua_gettable(L, 3); // 4 |
jbe/bsw@0 | 1532 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) { |
jbe/bsw@0 | 1533 lua_pushnil(L); |
jbe/bsw@0 | 1534 return 1; |
jbe/bsw@0 | 1535 } else if (!lua_isnil(L, 4)) { |
jbe/bsw@0 | 1536 return 1; |
jbe/bsw@0 | 1537 } |
jbe/bsw@0 | 1538 lua_settop(L, 2); |
jbe/bsw@0 | 1539 // try to load a referenced object: |
jbe/bsw@0 | 1540 lua_pushcfunction(L, mondelefant_class_get_reference); // 3 |
jbe/bsw@0 | 1541 lua_getfield(L, 1, "_class"); // 4 |
jbe/bsw@0 | 1542 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1543 lua_call(L, 2, 1); // 3 |
jbe/bsw@0 | 1544 if (!lua_isnil(L, 3)) { |
jbe/bsw@0 | 1545 lua_settop(L, 2); |
jbe/bsw@0 | 1546 lua_getfield(L, 1, "load"); // 3 |
jbe/bsw@0 | 1547 lua_pushvalue(L, 1); // 4 (self) |
jbe/bsw@0 | 1548 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1549 lua_call(L, 2, 0); |
jbe/bsw@0 | 1550 lua_settop(L, 2); |
jbe/bsw@0 | 1551 lua_getfield(L, 1, "_ref"); // 3 |
jbe/bsw@0 | 1552 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1553 lua_gettable(L, 3); // 4 |
jbe/bsw@0 | 1554 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false |
jbe/bsw@0 | 1555 return 1; |
jbe/bsw@0 | 1556 } |
jbe/bsw@0 | 1557 return 0; |
jbe@23 | 1558 } else if (result_type && !strcmp(result_type, "list")) { // list |
jbe/bsw@0 | 1559 lua_settop(L, 3); |
jbe/bsw@0 | 1560 // try inherited list attributes or methods: |
jbe/bsw@0 | 1561 while (lua_toboolean(L, 3)) { |
jbe/bsw@0 | 1562 lua_getfield(L, 3, "list"); // 4 |
jbe/bsw@0 | 1563 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1564 lua_gettable(L, 4); // 5 |
jbe/bsw@0 | 1565 if (!lua_isnil(L, 5)) return 1; |
jbe/bsw@0 | 1566 lua_settop(L, 3); |
jbe/bsw@0 | 1567 lua_pushliteral(L, "prototype"); // 4 |
jbe/bsw@0 | 1568 lua_rawget(L, 3); // 4 |
jbe/bsw@0 | 1569 lua_replace(L, 3); |
jbe/bsw@0 | 1570 } |
jbe/bsw@0 | 1571 } |
jbe@23 | 1572 // return nothing: |
jbe/bsw@0 | 1573 return 0; |
jbe/bsw@0 | 1574 } |
jbe/bsw@0 | 1575 |
jbe@23 | 1576 // meta-method "__newindex" of database result lists and objects: |
jbe/bsw@0 | 1577 static int mondelefant_result_newindex(lua_State *L) { |
jbe/bsw@0 | 1578 const char *result_type; |
jbe@23 | 1579 // perform rawset, unless key is a string not starting with underscore: |
jbe/bsw@0 | 1580 lua_settop(L, 3); |
jbe/bsw@0 | 1581 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') { |
jbe/bsw@0 | 1582 lua_rawset(L, 1); |
jbe/bsw@0 | 1583 return 1; |
jbe/bsw@0 | 1584 } |
jbe@23 | 1585 // get value of "_class" attribute, or default class, when unset: |
jbe/bsw@0 | 1586 lua_getfield(L, 1, "_class"); // 4 |
jbe/bsw@0 | 1587 if (!lua_toboolean(L, 4)) { |
jbe/bsw@0 | 1588 lua_settop(L, 3); |
jbe/bsw@0 | 1589 lua_getfield(L, |
jbe/bsw@0 | 1590 LUA_REGISTRYINDEX, |
jbe/bsw@0 | 1591 MONDELEFANT_CLASS_PROTO_REGKEY |
jbe/bsw@0 | 1592 ); // 4 |
jbe/bsw@0 | 1593 } |
jbe@23 | 1594 // get value of "_type" attribute: |
jbe/bsw@0 | 1595 lua_getfield(L, 1, "_type"); // 5 |
jbe/bsw@0 | 1596 result_type = lua_tostring(L, 5); |
jbe@23 | 1597 // distinguish between lists and objects: |
jbe@23 | 1598 if (result_type && !strcmp(result_type, "object")) { // objects |
jbe/bsw@0 | 1599 lua_settop(L, 4); |
jbe/bsw@0 | 1600 // try object setter functions: |
jbe/bsw@0 | 1601 while (lua_toboolean(L, 4)) { |
jbe/bsw@0 | 1602 lua_getfield(L, 4, "object_set"); // 5 |
jbe/bsw@0 | 1603 lua_pushvalue(L, 2); // 6 |
jbe/bsw@0 | 1604 lua_gettable(L, 5); // 6 |
jbe/bsw@0 | 1605 if (lua_toboolean(L, 6)) { |
jbe/bsw@0 | 1606 lua_pushvalue(L, 1); // 7 |
jbe/bsw@0 | 1607 lua_pushvalue(L, 3); // 8 |
jbe/bsw@0 | 1608 lua_call(L, 2, 0); |
jbe/bsw@0 | 1609 return 0; |
jbe/bsw@0 | 1610 } |
jbe/bsw@0 | 1611 lua_settop(L, 4); |
jbe/bsw@0 | 1612 lua_pushliteral(L, "prototype"); // 5 |
jbe/bsw@0 | 1613 lua_rawget(L, 4); // 5 |
jbe/bsw@0 | 1614 lua_replace(L, 4); |
jbe/bsw@0 | 1615 } |
jbe/bsw@0 | 1616 lua_settop(L, 3); |
jbe/bsw@0 | 1617 // check, if a object reference is changed: |
jbe/bsw@0 | 1618 lua_pushcfunction(L, mondelefant_class_get_reference); // 4 |
jbe/bsw@0 | 1619 lua_getfield(L, 1, "_class"); // 5 |
jbe/bsw@0 | 1620 lua_pushvalue(L, 2); // 6 |
jbe/bsw@0 | 1621 lua_call(L, 2, 1); // 4 |
jbe/bsw@0 | 1622 if (!lua_isnil(L, 4)) { |
jbe/bsw@0 | 1623 // store object in _ref table (use false for nil): // TODO: use special object instead of false |
jbe/bsw@0 | 1624 lua_getfield(L, 1, "_ref"); // 5 |
jbe/bsw@0 | 1625 lua_pushvalue(L, 2); // 6 |
jbe/bsw@0 | 1626 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 7 |
jbe/bsw@0 | 1627 else lua_pushvalue(L, 3); // 7 |
jbe/bsw@0 | 1628 lua_settable(L, 5); |
jbe/bsw@0 | 1629 lua_settop(L, 4); |
jbe/bsw@0 | 1630 // delete referencing key from _data table: |
jbe/bsw@0 | 1631 lua_getfield(L, 4, "this_key"); // 5 |
jbe/bsw@0 | 1632 if (lua_isnil(L, 5)) { |
jbe/bsw@0 | 1633 return luaL_error(L, "Missing 'this_key' entry in model reference."); |
jbe/bsw@0 | 1634 } |
jbe/bsw@0 | 1635 lua_getfield(L, 1, "_data"); // 6 |
jbe/bsw@0 | 1636 lua_pushvalue(L, 5); // 7 |
jbe/bsw@0 | 1637 lua_pushnil(L); // 8 |
jbe/bsw@0 | 1638 lua_settable(L, 6); |
jbe/bsw@0 | 1639 lua_settop(L, 5); |
jbe/bsw@0 | 1640 lua_getfield(L, 1, "_dirty"); // 6 |
jbe/bsw@0 | 1641 lua_pushvalue(L, 5); // 7 |
jbe/bsw@0 | 1642 lua_pushboolean(L, 1); // 8 |
jbe/bsw@0 | 1643 lua_settable(L, 6); |
jbe/bsw@0 | 1644 return 0; |
jbe/bsw@0 | 1645 } |
jbe/bsw@0 | 1646 lua_settop(L, 3); |
jbe/bsw@0 | 1647 // store value in data field info: |
jbe/bsw@0 | 1648 lua_getfield(L, 1, "_data"); // 4 |
jbe/bsw@0 | 1649 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1650 lua_pushvalue(L, 3); // 6 |
jbe/bsw@0 | 1651 lua_settable(L, 4); |
jbe/bsw@0 | 1652 lua_settop(L, 3); |
jbe/bsw@0 | 1653 // mark field as dirty (needs to be UPDATEd on save): |
jbe/bsw@0 | 1654 lua_getfield(L, 1, "_dirty"); // 4 |
jbe/bsw@0 | 1655 lua_pushvalue(L, 2); // 5 |
jbe/bsw@0 | 1656 lua_pushboolean(L, 1); // 6 |
jbe/bsw@0 | 1657 lua_settable(L, 4); |
jbe/bsw@0 | 1658 lua_settop(L, 3); |
jbe/bsw@0 | 1659 // reset reference cache, if neccessary: |
jbe/bsw@0 | 1660 lua_pushcfunction(L, |
jbe/bsw@0 | 1661 mondelefant_class_get_foreign_key_reference_name |
jbe/bsw@0 | 1662 ); // 4 |
jbe/bsw@0 | 1663 lua_getfield(L, 1, "_class"); // 5 |
jbe/bsw@0 | 1664 lua_pushvalue(L, 2); // 6 |
jbe/bsw@0 | 1665 lua_call(L, 2, 1); // 4 |
jbe/bsw@0 | 1666 if (!lua_isnil(L, 4)) { |
jbe/bsw@0 | 1667 lua_getfield(L, 1, "_ref"); // 5 |
jbe/bsw@0 | 1668 lua_pushvalue(L, 4); // 6 |
jbe/bsw@0 | 1669 lua_pushnil(L); // 7 |
jbe/bsw@0 | 1670 lua_settable(L, 5); |
jbe/bsw@0 | 1671 } |
jbe/bsw@0 | 1672 return 0; |
jbe@23 | 1673 } else { // non-objects (i.e. lists) |
jbe@23 | 1674 // perform rawset: |
jbe/bsw@0 | 1675 lua_settop(L, 3); |
jbe/bsw@0 | 1676 lua_rawset(L, 1); |
jbe/bsw@0 | 1677 return 0; |
jbe/bsw@0 | 1678 } |
jbe/bsw@0 | 1679 } |
jbe/bsw@0 | 1680 |
jbe@23 | 1681 // meta-method "__index" of classes (models): |
jbe/bsw@0 | 1682 static int mondelefant_class_index(lua_State *L) { |
jbe@23 | 1683 // perform lookup in prototype: |
jbe/bsw@0 | 1684 lua_settop(L, 2); |
jbe/bsw@0 | 1685 lua_pushliteral(L, "prototype"); // 3 |
jbe/bsw@0 | 1686 lua_rawget(L, 1); // 3 |
jbe/bsw@0 | 1687 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1688 lua_gettable(L, 3); // 4 |
jbe/bsw@0 | 1689 return 1; |
jbe/bsw@0 | 1690 } |
jbe/bsw@0 | 1691 |
jbe@23 | 1692 // registration information for functions of library: |
jbe/bsw@0 | 1693 static const struct luaL_Reg mondelefant_module_functions[] = { |
jbe/bsw@0 | 1694 {"connect", mondelefant_connect}, |
jbe/bsw@0 | 1695 {"set_class", mondelefant_set_class}, |
jbe/bsw@0 | 1696 {"new_class", mondelefant_new_class}, |
jbe/bsw@0 | 1697 {NULL, NULL} |
jbe/bsw@0 | 1698 }; |
jbe/bsw@0 | 1699 |
jbe@23 | 1700 // registration information for meta-methods of database connections: |
jbe/bsw@0 | 1701 static const struct luaL_Reg mondelefant_conn_mt_functions[] = { |
jbe/bsw@0 | 1702 {"__gc", mondelefant_conn_free}, |
jbe/bsw@0 | 1703 {"__index", mondelefant_conn_index}, |
jbe/bsw@0 | 1704 {"__newindex", mondelefant_conn_newindex}, |
jbe/bsw@0 | 1705 {NULL, NULL} |
jbe/bsw@0 | 1706 }; |
jbe/bsw@0 | 1707 |
jbe@23 | 1708 // registration information for methods of database connections: |
jbe/bsw@0 | 1709 static const struct luaL_Reg mondelefant_conn_methods[] = { |
jbe/bsw@0 | 1710 {"close", mondelefant_conn_close}, |
jbe/bsw@0 | 1711 {"is_ok", mondelefant_conn_is_ok}, |
jbe/bsw@0 | 1712 {"get_transaction_status", mondelefant_conn_get_transaction_status}, |
jbe/bsw@0 | 1713 {"create_list", mondelefant_conn_create_list}, |
jbe/bsw@0 | 1714 {"create_object", mondelefant_conn_create_object}, |
jbe/bsw@0 | 1715 {"quote_string", mondelefant_conn_quote_string}, |
jbe/bsw@0 | 1716 {"quote_binary", mondelefant_conn_quote_binary}, |
jbe/bsw@0 | 1717 {"assemble_command", mondelefant_conn_assemble_command}, |
jbe/bsw@0 | 1718 {"try_query", mondelefant_conn_try_query}, |
jbe/bsw@0 | 1719 {"query", mondelefant_conn_query}, |
jbe/bsw@0 | 1720 {NULL, NULL} |
jbe/bsw@0 | 1721 }; |
jbe/bsw@0 | 1722 |
jbe@23 | 1723 // registration information for meta-methods of error objects: |
jbe/bsw@0 | 1724 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = { |
jbe/bsw@0 | 1725 {NULL, NULL} |
jbe/bsw@0 | 1726 }; |
jbe/bsw@0 | 1727 |
jbe@23 | 1728 // registration information for methods of error objects: |
jbe/bsw@0 | 1729 static const struct luaL_Reg mondelefant_errorobject_methods[] = { |
jbe/bsw@0 | 1730 {"escalate", mondelefant_errorobject_escalate}, |
jbe/bsw@0 | 1731 {"is_kind_of", mondelefant_errorobject_is_kind_of}, |
jbe/bsw@0 | 1732 {NULL, NULL} |
jbe/bsw@0 | 1733 }; |
jbe/bsw@0 | 1734 |
jbe@23 | 1735 // registration information for meta-methods of database result lists/objects: |
jbe/bsw@0 | 1736 static const struct luaL_Reg mondelefant_result_mt_functions[] = { |
jbe/bsw@0 | 1737 {"__index", mondelefant_result_index}, |
jbe/bsw@0 | 1738 {"__newindex", mondelefant_result_newindex}, |
jbe/bsw@0 | 1739 {NULL, NULL} |
jbe/bsw@0 | 1740 }; |
jbe/bsw@0 | 1741 |
jbe@23 | 1742 // registration information for methods of database result lists/objects: |
jbe/bsw@0 | 1743 static const struct luaL_Reg mondelefant_class_mt_functions[] = { |
jbe/bsw@0 | 1744 {"__index", mondelefant_class_index}, |
jbe/bsw@0 | 1745 {NULL, NULL} |
jbe/bsw@0 | 1746 }; |
jbe/bsw@0 | 1747 |
jbe@23 | 1748 // registration information for methods of classes (models): |
jbe/bsw@0 | 1749 static const struct luaL_Reg mondelefant_class_methods[] = { |
jbe/bsw@0 | 1750 {"get_reference", mondelefant_class_get_reference}, |
jbe/bsw@0 | 1751 {"iterate_over_references", mondelefant_class_iterate_over_references}, |
jbe/bsw@0 | 1752 {"get_foreign_key_reference_name", |
jbe/bsw@0 | 1753 mondelefant_class_get_foreign_key_reference_name}, |
jbe/bsw@0 | 1754 {NULL, NULL} |
jbe/bsw@0 | 1755 }; |
jbe/bsw@0 | 1756 |
jbe@23 | 1757 // registration information for methods of database result objects (not lists!): |
jbe/bsw@0 | 1758 static const struct luaL_Reg mondelefant_object_methods[] = { |
jbe/bsw@0 | 1759 {NULL, NULL} |
jbe/bsw@0 | 1760 }; |
jbe/bsw@0 | 1761 |
jbe@23 | 1762 // registration information for methods of database result lists (not single objects!): |
jbe/bsw@0 | 1763 static const struct luaL_Reg mondelefant_list_methods[] = { |
jbe/bsw@0 | 1764 {NULL, NULL} |
jbe/bsw@0 | 1765 }; |
jbe/bsw@0 | 1766 |
jbe@23 | 1767 // luaopen function to initialize/register library: |
jbe/bsw@0 | 1768 int luaopen_mondelefant_native(lua_State *L) { |
jbe/bsw@0 | 1769 lua_settop(L, 0); |
jbe/bsw@0 | 1770 lua_newtable(L); // module at stack position 1 |
jbe@64 | 1771 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1772 luaL_setfuncs(L, mondelefant_module_functions, 0); |
jbe@64 | 1773 #else |
jbe/bsw@0 | 1774 luaL_register(L, NULL, mondelefant_module_functions); |
jbe@64 | 1775 #endif |
jbe/bsw@0 | 1776 |
jbe/bsw@0 | 1777 lua_pushvalue(L, 1); // 2 |
jbe/bsw@0 | 1778 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); |
jbe/bsw@0 | 1779 |
jbe/bsw@0 | 1780 lua_newtable(L); // 2 |
jbe/bsw@0 | 1781 // NOTE: only PostgreSQL is supported yet: |
jbe@64 | 1782 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1783 luaL_setfuncs(L, mondelefant_conn_methods, 0); |
jbe@64 | 1784 #else |
jbe/bsw@0 | 1785 luaL_register(L, NULL, mondelefant_conn_methods); |
jbe@64 | 1786 #endif |
jbe/bsw@0 | 1787 lua_setfield(L, 1, "postgresql_connection_prototype"); |
jbe/bsw@0 | 1788 lua_newtable(L); // 2 |
jbe/bsw@0 | 1789 lua_setfield(L, 1, "connection_prototype"); |
jbe/bsw@0 | 1790 |
jbe/bsw@0 | 1791 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2 |
jbe@64 | 1792 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1793 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0); |
jbe@64 | 1794 #else |
jbe/bsw@0 | 1795 luaL_register(L, NULL, mondelefant_conn_mt_functions); |
jbe@64 | 1796 #endif |
jbe/bsw@0 | 1797 lua_settop(L, 1); |
jbe/bsw@0 | 1798 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2 |
jbe@64 | 1799 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1800 luaL_setfuncs(L, mondelefant_result_mt_functions, 0); |
jbe@64 | 1801 #else |
jbe/bsw@0 | 1802 luaL_register(L, NULL, mondelefant_result_mt_functions); |
jbe@64 | 1803 #endif |
jbe/bsw@0 | 1804 lua_setfield(L, 1, "result_metatable"); |
jbe/bsw@0 | 1805 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2 |
jbe@64 | 1806 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1807 luaL_setfuncs(L, mondelefant_class_mt_functions, 0); |
jbe@64 | 1808 #else |
jbe/bsw@0 | 1809 luaL_register(L, NULL, mondelefant_class_mt_functions); |
jbe@64 | 1810 #endif |
jbe/bsw@0 | 1811 lua_setfield(L, 1, "class_metatable"); |
jbe/bsw@0 | 1812 |
jbe/bsw@0 | 1813 lua_newtable(L); // 2 |
jbe/bsw@0 | 1814 lua_newtable(L); // 3 |
jbe@64 | 1815 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1816 luaL_setfuncs(L, mondelefant_object_methods, 0); |
jbe@64 | 1817 #else |
jbe/bsw@0 | 1818 luaL_register(L, NULL, mondelefant_object_methods); |
jbe@64 | 1819 #endif |
jbe/bsw@0 | 1820 lua_setfield(L, 2, "object"); |
jbe/bsw@0 | 1821 lua_newtable(L); // 3 |
jbe/bsw@0 | 1822 lua_setfield(L, 2, "object_get"); |
jbe/bsw@0 | 1823 lua_newtable(L); // 3 |
jbe/bsw@0 | 1824 lua_setfield(L, 2, "object_set"); |
jbe/bsw@0 | 1825 lua_newtable(L); // 3 |
jbe@64 | 1826 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1827 luaL_setfuncs(L, mondelefant_list_methods, 0); |
jbe@64 | 1828 #else |
jbe/bsw@0 | 1829 luaL_register(L, NULL, mondelefant_list_methods); |
jbe@64 | 1830 #endif |
jbe/bsw@0 | 1831 lua_setfield(L, 2, "list"); |
jbe/bsw@0 | 1832 lua_newtable(L); // 3 |
jbe/bsw@0 | 1833 lua_setfield(L, 2, "references"); |
jbe/bsw@0 | 1834 lua_newtable(L); // 3 |
jbe/bsw@0 | 1835 lua_setfield(L, 2, "foreign_keys"); |
jbe/bsw@0 | 1836 lua_pushvalue(L, 2); // 3 |
jbe/bsw@0 | 1837 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY); |
jbe/bsw@0 | 1838 lua_setfield(L, 1, "class_prototype"); |
jbe/bsw@0 | 1839 |
jbe/bsw@0 | 1840 lua_newtable(L); // 2 |
jbe/bsw@0 | 1841 lua_pushliteral(L, "k"); // 3 |
jbe/bsw@0 | 1842 lua_setfield(L, 2, "__mode"); |
jbe/bsw@0 | 1843 lua_newtable(L); // 3 |
jbe/bsw@0 | 1844 lua_pushvalue(L, 2); // 4 |
jbe/bsw@0 | 1845 lua_setmetatable(L, 3); |
jbe/bsw@0 | 1846 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); |
jbe/bsw@0 | 1847 lua_settop(L, 1); |
jbe/bsw@0 | 1848 |
jbe/bsw@0 | 1849 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2 |
jbe@64 | 1850 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1851 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0); |
jbe@64 | 1852 #else |
jbe/bsw@0 | 1853 luaL_register(L, NULL, mondelefant_errorobject_mt_functions); |
jbe@64 | 1854 #endif |
jbe/bsw@0 | 1855 lua_newtable(L); // 3 |
jbe@64 | 1856 #if LUA_VERSION_NUM >= 502 |
jbe@64 | 1857 luaL_setfuncs(L, mondelefant_errorobject_methods, 0); |
jbe@64 | 1858 #else |
jbe/bsw@0 | 1859 luaL_register(L, NULL, mondelefant_errorobject_methods); |
jbe@64 | 1860 #endif |
jbe/bsw@0 | 1861 lua_setfield(L, 2, "__index"); |
jbe/bsw@0 | 1862 lua_setfield(L, 1, "errorobject_metatable"); |
jbe/bsw@0 | 1863 |
jbe/bsw@0 | 1864 return 1; |
jbe/bsw@0 | 1865 } |