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