Line data Source code
1 : /*
2 : * SPDX-License-Identifier: MPL-2.0
3 : *
4 : * This Source Code Form is subject to the terms of the Mozilla Public
5 : * License, v. 2.0. If a copy of the MPL was not distributed with this
6 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
7 : *
8 : * Copyright 2024 MonetDB Foundation;
9 : * Copyright August 2008 - 2023 MonetDB B.V.;
10 : * Copyright 1997 - July 2008 CWI.
11 : */
12 :
13 : /* Author(s) M.L. Kersten, N. Nes
14 : * This module takes the statically defined modules, atoms, commands and patterns
15 : * and populate the internal structures.
16 : *
17 : */
18 :
19 : #include "monetdb_config.h"
20 : #include "mal_import.h"
21 : #include "mal_interpreter.h" /* for showErrors() */
22 : #include "mal_linker.h" /* for loadModuleLibrary() */
23 : #include "mal_scenario.h"
24 : #include "mal_parser.h"
25 : #include "mal_authorize.h"
26 : #include "mal_private.h"
27 : #include "mutils.h"
28 :
29 : #include "mal_prelude.h"
30 :
31 : #define MAX_MAL_MODULES 128
32 : static int mel_modules = 0, mel_modules_loaded = 0;
33 : static struct mel_module {
34 : const char *name;
35 : mel_atom *atoms;
36 : mel_func *funcs;
37 : mel_init inits;
38 : const char *code;
39 : } mel_module[MAX_MAL_MODULES];
40 :
41 : int
42 352 : mal_startup(void)
43 : {
44 : /* clean up the MAL internal structures before restart */
45 352 : mel_modules_loaded = 0;
46 352 : return 0;
47 : }
48 :
49 : /* all MAL related functions register themselves
50 : * the order in which these registrations happen is significant
51 : * because there may be dependencies among the definitions.
52 : * For example, you better know the atoms before you use them
53 : */
54 :
55 : void
56 18279 : mal_module2(const char *name, mel_atom *atoms, mel_func *funcs,
57 : mel_init initfunc, const char *code)
58 : {
59 18279 : assert(mel_modules < MAX_MAL_MODULES);
60 18279 : mel_module[mel_modules].name = name;
61 18279 : mel_module[mel_modules].atoms = atoms;
62 18279 : mel_module[mel_modules].funcs = funcs;
63 18279 : mel_module[mel_modules].inits = initfunc;
64 18279 : mel_module[mel_modules].code = code;
65 18279 : mel_modules++;
66 18279 : }
67 :
68 : void
69 15167 : mal_module(const char *name, mel_atom *atoms, mel_func *funcs)
70 : {
71 15167 : mal_module2(name, atoms, funcs, NULL, NULL);
72 15167 : }
73 :
74 : static char *
75 16147 : initModule(Client c, const char *name, const char *initpasswd)
76 : {
77 16147 : char *msg = MAL_SUCCEED;
78 :
79 16147 : assert(getName(name) == name);
80 16147 : Module m = getModule(name);
81 16147 : if (m) { /* run prelude */
82 12979 : const char *prelude = putName("prelude");
83 12979 : if (prelude == NULL)
84 0 : throw(LOADER, __func__, SQLSTATE(HY013) MAL_MALLOC_FAIL);
85 12979 : Symbol s = findSymbolInModule(m, prelude);
86 :
87 12979 : if (s) {
88 702 : if (s && s->kind == COMMANDsymbol && s->func && s->func->argc == 1) {
89 0 : int ret = 0;
90 :
91 0 : assert(s->func != NULL);
92 0 : msg = (*(str (*)(int *)) s->func->imp) (&ret);
93 0 : (void) ret;
94 702 : } else if (s && s->kind == PATTERNsymbol) {
95 702 : void *mb = NULL;
96 702 : assert(s->func->fcn != NULL);
97 702 : if (strcmp(name, "sql") == 0) {
98 : /* HACK ALERT: temporarily use sqlcontext to pass
99 : * the initial password to the prelude function */
100 352 : assert(c->sqlcontext == NULL);
101 352 : c->sqlcontext = (void *) initpasswd;
102 : /* HACK ALERT: use mb (MalBlkPtr) to pass revision
103 : * string in order to check that in the callee */
104 352 : mb = (void *) mercurial_revision();
105 : }
106 702 : msg = (*(str (*)(Client, MalBlkPtr, MalStkPtr, InstrPtr)) s->func->pimp) (c, mb, NULL, NULL);
107 : }
108 : }
109 : }
110 : return msg;
111 : }
112 :
113 : /*
114 : * The statically description of the MAL structures call for a translation into
115 : * their underlying structure.
116 : */
117 : static str
118 2452 : addAtom(mel_atom *atoms)
119 : {
120 5596 : for (; atoms && atoms->name[0]; atoms++) {
121 3144 : int i = ATOMallocate(atoms->name);
122 3144 : if (is_int_nil(i))
123 0 : throw(TYPE, __func__, GDK_EXCEPTION);
124 3144 : if (atoms->basetype[0]) {
125 2452 : int tpe = ATOMindex(atoms->basetype);
126 2452 : if (tpe < 0)
127 0 : throw(TYPE, __func__, TYPE_NOT_SUPPORTED);
128 2452 : BATatoms[i] = BATatoms[tpe];
129 2452 : strcpy_len(BATatoms[i].name, atoms->name, sizeof(BATatoms[i].name));
130 2452 : BATatoms[i].storage = ATOMstorage(tpe);
131 : } else { /* cannot overload void atoms */
132 692 : BATatoms[i].storage = i;
133 692 : BATatoms[i].linear = false;
134 : }
135 3144 : if (atoms->del)
136 340 : BATatoms[i].atomDel = atoms->del;
137 3144 : if (atoms->cmp) {
138 1032 : BATatoms[i].atomCmp = atoms->cmp;
139 1032 : BATatoms[i].linear = true;
140 : }
141 3144 : if (atoms->fromstr)
142 2088 : BATatoms[i].atomFromStr = atoms->fromstr;
143 3144 : if (atoms->tostr)
144 2088 : BATatoms[i].atomToStr = atoms->tostr;
145 3144 : if (atoms->heap) {
146 340 : BATatoms[i].size = sizeof(var_t);
147 340 : assert_shift_width(ATOMelmshift(ATOMsize(i)), ATOMsize(i));
148 340 : BATatoms[i].atomHeap = atoms->heap;
149 : }
150 3144 : if (atoms->hash)
151 680 : BATatoms[i].atomHash = atoms->hash;
152 3144 : if (atoms->length)
153 340 : BATatoms[i].atomLen = atoms->length;
154 3144 : if (atoms->null) {
155 1032 : const void *atmnull = (*atoms->null) ();
156 :
157 1032 : BATatoms[i].atomNull = atmnull;
158 : }
159 3144 : if (atoms->nequal)
160 0 : BATatoms[i].atomCmp = atoms->nequal;
161 3144 : if (atoms->put)
162 340 : BATatoms[i].atomPut = atoms->put;
163 3144 : if (atoms->storage)
164 0 : BATatoms[i].storage = (*atoms->storage) ();
165 3144 : if (atoms->read)
166 680 : BATatoms[i].atomRead = atoms->read;
167 3144 : if (atoms->write)
168 680 : BATatoms[i].atomWrite = atoms->write;
169 : }
170 : return MAL_SUCCEED;
171 : }
172 :
173 : static malType
174 13691790 : makeMalType(mel_arg *a)
175 : {
176 13691790 : malType tpe = TYPE_any;
177 :
178 13691790 : if (!a->type[0]) {
179 446298 : a->typeid = tpe;
180 446298 : if (a->isbat)
181 352348 : tpe = newBatType(tpe);
182 446298 : if (a->nr > 0)
183 410780 : setTypeIndex(tpe, a->nr);
184 : } else {
185 13245492 : tpe = getAtomIndex(a->type, strlen(a->type), -1);
186 13245492 : a->typeid = tpe;
187 13245492 : if (a->isbat)
188 7921267 : tpe = newBatType(tpe);
189 : }
190 13691790 : if (a->opt == 1)
191 166144 : setOptBat(tpe);
192 13691790 : return tpe;
193 : }
194 :
195 : void
196 794430 : setPoly(mel_func *f, malType tpe)
197 : {
198 776876 : if (isAnyExpression(tpe) || tpe == TYPE_any || getOptBat(tpe)) {
199 591678 : unsigned int index = getTypeIndex(tpe);
200 574124 : if (index + 1 > f->poly)
201 327966 : f->poly = index + 1;
202 : }
203 776876 : }
204 :
205 : static str
206 18611 : addFunctions(mel_func *fcn)
207 : {
208 18611 : str msg = MAL_SUCCEED;
209 18611 : Module c;
210 18611 : Symbol s;
211 :
212 1834127 : for (; fcn && fcn->mod; fcn++) {
213 1815516 : const char *mod = putName(fcn->mod);
214 1815516 : if (mod == NULL)
215 0 : throw(LOADER, __func__, SQLSTATE(HY013) MAL_MALLOC_FAIL);
216 1815516 : c = getModule(mod);
217 1815516 : if (c == NULL && (c = globalModule(mod)) == NULL)
218 0 : throw(LOADER, __func__, "Module %s can not be created", mod);
219 :
220 3077232 : s = newSymbol(fcn->fcn, (fcn->command) ? COMMANDsymbol : PATTERNsymbol);
221 1815516 : if (s == NULL)
222 0 : throw(LOADER, __func__, "Can not create symbol for %s.%s missing", mod,
223 : fcn->fcn);
224 1815516 : s->def = NULL;
225 1815516 : s->func = fcn;
226 1815516 : s->allocated = false;
227 :
228 : /* add the return variables */
229 1815516 : unsigned int i;
230 3743424 : for (i = 0; i < fcn->retc; i++) {
231 1927908 : mel_arg *a = fcn->args + i;
232 1927908 : malType tpe = makeMalType(a);
233 1927908 : if (a->nr > 0 || a->opt)
234 60916 : setPoly(fcn, tpe);
235 1927908 : if (a->vargs) {
236 3334 : fcn->vrets = true;
237 3334 : setPoly(fcn, TYPE_any);
238 : }
239 1927908 : if (a->opt && fcn->command)
240 0 : throw(LOADER, __func__, "Can not have command symbol with dynamic types, ie bat vs scalar in %s.%s", mod, fcn->fcn);
241 : /*
242 : if (a->nr >= 2)
243 : printf("%s.%s\n", mod, fcn->fcn);
244 : */
245 : }
246 : /* add the arguments */
247 6550662 : for (i = fcn->retc; i < fcn->argc; i++) {
248 4735146 : mel_arg *a = fcn->args + i;
249 4735146 : malType tpe = makeMalType(a);
250 :
251 4735146 : if (a->nr > 0 || a->opt)
252 479400 : setPoly(fcn, tpe);
253 4735146 : if (a->vargs) {
254 14220 : fcn->vargs = true;
255 14220 : setPoly(fcn, TYPE_any);
256 : }
257 4735146 : if (a->opt && fcn->command)
258 0 : throw(LOADER, __func__, "Can not have command symbol with dynamic types, ie bat vs scalar in %s.%s", mod, fcn->fcn);
259 : /*
260 : if (a->nr >= 2)
261 : printf("%s.%s\n", mod, fcn->fcn);
262 : */
263 : }
264 1815516 : insertSymbol(c, s);
265 : }
266 : return msg;
267 : }
268 :
269 : static void
270 7028736 : argCopy( mel_arg *ap, mel_func_arg *a)
271 : {
272 7028736 : ap->typeid = a->type;
273 7028736 : ap->nr = a->nr;
274 7028736 : ap->isbat = a->isbat;
275 7028736 : ap->vargs = a->vargs;
276 7028736 : ap->opt = a->opt;
277 7028736 : if (a->type != TYPE_any)
278 6994240 : strcpy(ap->type, BATatoms[a->type].name);
279 : else
280 34496 : ap->type[0] = 0;
281 7028736 : }
282 :
283 : int
284 1752608 : melFunction(bool command, const char *mod, const char *fcn, MALfcn imp,
285 : const char *fname, bool unsafe, const char *comment, int retc,
286 : int argc, ...)
287 : {
288 1752608 : int i;
289 1752608 : Module c;
290 1752608 : Symbol s;
291 1752608 : mel_func *f = NULL;
292 1752608 : va_list va;
293 :
294 1752608 : assert(mod && fcn);
295 1752608 : mod = putName(mod);
296 1752608 : fcn = putName(fcn);
297 1752608 : c = getModule(mod);
298 1752608 : if (c == NULL && (c = globalModule(mod)) == NULL)
299 : return MEL_ERR;
300 :
301 3505216 : s = newSymbol(fcn, command ? COMMANDsymbol : PATTERNsymbol);
302 1752608 : if (s == NULL)
303 : return MEL_ERR;
304 1752608 : fcn = s->name;
305 1752608 : s->allocated = true;
306 :
307 1752608 : f = (mel_func*)GDKmalloc(sizeof(mel_func));
308 1752608 : mel_arg *args = (mel_arg*)GDKmalloc(sizeof(mel_arg)*argc);
309 1752608 : if (!f || !args) {
310 0 : GDKfree(f);
311 0 : GDKfree(args);
312 0 : freeSymbol(s);
313 0 : return MEL_ERR;
314 : }
315 3505216 : *f = (mel_func) {
316 : .mod = mod,
317 : .fcn = fcn,
318 : .command = command,
319 : .unsafe = unsafe,
320 : .vargs = 0,
321 : .vrets = 0,
322 : .poly = 0,
323 : .retc = retc,
324 : .argc = argc,
325 : .args = args,
326 : .imp = imp,
327 1752608 : .comment = comment ? GDKstrdup(comment) : NULL,
328 1752608 : .cname = fname ? GDKstrdup(fname) : NULL,
329 : };
330 1752608 : s->def = NULL;
331 1752608 : s->func = f;
332 :
333 1752608 : va_start(va, argc);
334 3515072 : for (i = 0; i < retc; i++) {
335 1762464 : mel_func_arg a = va_arg(va, mel_func_arg);
336 1762464 : mel_arg *ap = f->args+i;
337 1762464 : argCopy(ap, &a);
338 1762464 : malType tpe = makeMalType(ap);
339 1762464 : if (a.nr > 0 || a.opt)
340 0 : setPoly(f, tpe);
341 1762464 : if (a.vargs) {
342 0 : f->vrets = true;
343 0 : setPoly(f, TYPE_any);
344 : }
345 1762464 : if (a.opt && f->command) {
346 0 : va_end(va);
347 0 : freeSymbol(s); /* also frees f and args */
348 0 : return MEL_ERR;
349 : }
350 : /*
351 : if (a.nr >= 2)
352 : printf("%s.%s\n", f->mod, f->fcn);
353 : */
354 : }
355 : /* add the arguments */
356 7018880 : for (i = retc; i < argc; i++) {
357 5266272 : mel_func_arg a = va_arg(va, mel_func_arg);
358 5266272 : mel_arg *ap = f->args+i;
359 5266272 : argCopy(ap, &a);
360 5266272 : malType tpe = makeMalType(ap);
361 5266272 : if (a.nr > 0 || a.opt)
362 236544 : setPoly(f, tpe);
363 5266272 : if (a.vargs) {
364 0 : f->vargs = true;
365 0 : setPoly(f, TYPE_any);
366 : }
367 5266272 : if (a.opt && f->command) {
368 0 : va_end(va);
369 0 : freeSymbol(s); /* also frees f and args */
370 0 : return MEL_ERR;
371 : }
372 : /*
373 : if (a.nr >= 2)
374 : printf("%s.%s\n", f->mod, f->fcn);
375 : */
376 : }
377 1752608 : insertSymbol(c, s);
378 1752608 : va_end(va);
379 1752608 : return MEL_OK;
380 : }
381 :
382 : static str
383 352 : malPrelude(Client c, int listing, int *sql, int *mapi)
384 : {
385 352 : int i;
386 352 : str msg = MAL_SUCCEED;
387 :
388 352 : (void) listing;
389 : /* Add all atom definitions */
390 18963 : for (i = mel_modules_loaded; i < mel_modules; i++) {
391 18611 : if (mel_module[i].atoms) {
392 2452 : msg = addAtom(mel_module[i].atoms);
393 2452 : if (msg)
394 0 : return msg;
395 : }
396 : }
397 :
398 : /* Add the signatures, where we now have access to all atoms */
399 18963 : for (i = mel_modules_loaded; i < mel_modules; i++) {
400 18611 : const char *name = putName(mel_module[i].name);
401 18611 : if (name == NULL)
402 0 : throw(LOADER, __func__, MAL_MALLOC_FAIL);
403 18611 : if (!malLibraryEnabled(name))
404 0 : continue;
405 18611 : if (mel_module[i].funcs) {
406 18611 : msg = addFunctions(mel_module[i].funcs);
407 18611 : if (!msg && mel_module[i].code) /* some modules may also have some function definitions */
408 0 : msg = malIncludeString(c, name, (str) mel_module[i].code, listing, NULL);
409 18611 : if (msg)
410 0 : return msg;
411 :
412 : /* mapi should be last, and sql last before mapi */
413 18611 : if (name == sqlRef) {
414 352 : *sql = i;
415 352 : continue;
416 : }
417 18259 : if (name == mapiRef) {
418 352 : *mapi = i;
419 352 : continue;
420 : }
421 17907 : if (!mel_module[i].inits) {
422 15795 : msg = initModule(c, name, NULL);
423 15795 : if (msg)
424 0 : return msg;
425 : }
426 : }
427 17907 : if (mel_module[i].inits) {
428 : /* mapi should be last, and sql last before mapi */
429 2112 : if (name == sqlRef || name == mapiRef)
430 0 : continue;
431 2112 : msg = mel_module[i].inits();
432 2112 : if (msg)
433 0 : return msg;
434 : }
435 : }
436 352 : mel_modules_loaded = mel_modules;
437 352 : return MAL_SUCCEED;
438 : }
439 :
440 : str
441 352 : malIncludeModules(Client c, char *modules[], int listing, bool no_mapi_server,
442 : const char *initpasswd)
443 : {
444 352 : str msg;
445 352 : int sql = -1, mapi = -1;
446 :
447 3773 : for (int i = 0; modules[i]; i++) {
448 : /* load library */
449 3421 : if (!malLibraryEnabled(modules[i]))
450 998 : continue;
451 2423 : if ((msg = loadLibrary(modules[i], listing)) != NULL)
452 0 : return msg;
453 : }
454 : /* load the mal code for these modules and execute preludes */
455 352 : if ((msg = malPrelude(c, listing, &sql, &mapi)) != NULL)
456 : return msg;
457 : /* mapi should be last, and sql last before mapi */
458 352 : if (sql >= 0) {
459 352 : if (mel_module[sql].inits)
460 0 : msg = mel_module[sql].inits();
461 : else
462 352 : msg = initModule(c, sqlRef, initpasswd);
463 351 : if (msg)
464 : return msg;
465 : }
466 351 : if (!no_mapi_server && mapi >= 0 && initpasswd == NULL) {
467 339 : if (mel_module[mapi].inits)
468 339 : msg = mel_module[mapi].inits();
469 : else
470 0 : msg = initModule(c, mapiRef, NULL);
471 339 : if (msg)
472 : return msg;
473 : }
474 : return MAL_SUCCEED;
475 : }
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