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 }
|