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 : #ifndef _GDK_ATOMS_H_
14 : #define _GDK_ATOMS_H_
15 :
16 : /* atomFromStr returns the number of bytes of the input string that
17 : * were processed. atomToStr returns the length of the string
18 : * produced. Both functions return -1 on (any kind of) failure. If
19 : * *dst is not NULL, *len specifies the available space. If there is
20 : * not enough space, or if *dst is NULL, *dst will be freed (if not
21 : * NULL) and a new buffer will be allocated and returned in *dst.
22 : * *len will be set to reflect the actual size allocated. If
23 : * allocation fails, *dst will be NULL on return and *len is
24 : * undefined. In any case, if the function returns, *buf is either
25 : * NULL or a valid pointer and then *len is the size of the area *buf
26 : * points to.
27 : *
28 : * atomCmp returns a value less than zero/equal to zero/greater than
29 : * zer if the first argument points to a values which is deemed
30 : * smaller/equal to/larger than the value pointed to by the second
31 : * argument.
32 : *
33 : * atomHash calculates a hash function for the value pointed to by the
34 : * argument.
35 : */
36 :
37 : #define IDLENGTH 64 /* maximum BAT id length */
38 :
39 : typedef struct {
40 : /* simple attributes */
41 : char name[IDLENGTH];
42 : uint8_t storage; /* stored as another type? */
43 : bool linear; /* atom can be ordered linearly */
44 : uint16_t size; /* fixed size of atom */
45 :
46 : /* automatically generated fields */
47 : const void *atomNull; /* global nil value */
48 :
49 : /* generic (fixed + varsized atom) ADT functions */
50 : ssize_t (*atomFromStr) (const char *src, size_t *len, void **dst, bool external);
51 : ssize_t (*atomToStr) (char **dst, size_t *len, const void *src, bool external);
52 : void *(*atomRead) (void *dst, size_t *dstlen, stream *s, size_t cnt);
53 : gdk_return (*atomWrite) (const void *src, stream *s, size_t cnt);
54 : int (*atomCmp) (const void *v1, const void *v2);
55 : BUN (*atomHash) (const void *v);
56 :
57 : /* varsized atom-only ADT functions */
58 : var_t (*atomPut) (BAT *, var_t *off, const void *src);
59 : void (*atomDel) (Heap *, var_t *atom);
60 : size_t (*atomLen) (const void *atom);
61 : gdk_return (*atomHeap) (Heap *, size_t);
62 : } atomDesc;
63 :
64 : #define MAXATOMS 128
65 :
66 : gdk_export atomDesc BATatoms[MAXATOMS];
67 : gdk_export int GDKatomcnt;
68 :
69 : gdk_export int ATOMallocate(const char *nme);
70 : gdk_export int ATOMindex(const char *nme);
71 :
72 : gdk_export const char *ATOMname(int id);
73 : gdk_export size_t ATOMlen(int id, const void *v);
74 : gdk_export void *ATOMnil(int id)
75 : __attribute__((__malloc__));
76 : gdk_export int ATOMprint(int id, const void *val, stream *fd);
77 : gdk_export char *ATOMformat(int id, const void *val)
78 : __attribute__((__warn_unused_result__));
79 :
80 : gdk_export void *ATOMdup(int id, const void *val);
81 :
82 : /*
83 : * @- maximum atomic string lengths
84 : */
85 : #define bitStrlen 8
86 : #define bteStrlen 8
87 : #define shtStrlen 12
88 : #define intStrlen 24
89 : #if SIZEOF_OID == SIZEOF_INT
90 : #define oidStrlen 24
91 : #else
92 : #define oidStrlen 48
93 : #endif
94 : #if SIZEOF_PTR == SIZEOF_INT
95 : #define ptrStrlen 24
96 : #else
97 : #define ptrStrlen 48
98 : #endif
99 : #define lngStrlen 48
100 : #ifdef HAVE_HGE
101 : #define hgeStrlen 96
102 : #endif
103 : #define fltStrlen 48
104 : #define dblStrlen 96
105 :
106 : /*
107 : * The system comes with the traditional atomic types: int (4 bytes),
108 : * bool(1 byte) and str (variable). In addition, we support the notion
109 : * of an OID type, which ensures uniqueness of its members. This
110 : * leads to the following type descriptor table.
111 : */
112 :
113 : #ifdef HAVE_HGE
114 : gdk_export ssize_t hgeFromStr(const char *src, size_t *len, hge **dst, bool external);
115 : gdk_export ssize_t hgeToStr(str *dst, size_t *len, const hge *src, bool external);
116 : #endif
117 : gdk_export ssize_t lngFromStr(const char *src, size_t *len, lng **dst, bool external);
118 : gdk_export ssize_t lngToStr(str *dst, size_t *len, const lng *src, bool external);
119 : gdk_export ssize_t intFromStr(const char *src, size_t *len, int **dst, bool external);
120 : gdk_export ssize_t intToStr(str *dst, size_t *len, const int *src, bool external);
121 : gdk_export ssize_t batFromStr(const char *src, size_t *len, bat **dst, bool external);
122 : gdk_export ssize_t batToStr(str *dst, size_t *len, const bat *src, bool external);
123 : gdk_export ssize_t ptrFromStr(const char *src, size_t *len, ptr **dst, bool external);
124 : gdk_export ssize_t ptrToStr(str *dst, size_t *len, const ptr *src, bool external);
125 : gdk_export ssize_t bitFromStr(const char *src, size_t *len, bit **dst, bool external);
126 : gdk_export ssize_t bitToStr(str *dst, size_t *len, const bit *src, bool external);
127 : gdk_export ssize_t OIDfromStr(const char *src, size_t *len, oid **dst, bool external);
128 : gdk_export ssize_t OIDtoStr(str *dst, size_t *len, const oid *src, bool external);
129 : gdk_export ssize_t shtFromStr(const char *src, size_t *len, sht **dst, bool external);
130 : gdk_export ssize_t shtToStr(str *dst, size_t *len, const sht *src, bool external);
131 : gdk_export ssize_t bteFromStr(const char *src, size_t *len, bte **dst, bool external);
132 : gdk_export ssize_t bteToStr(str *dst, size_t *len, const bte *src, bool external);
133 : gdk_export ssize_t fltFromStr(const char *src, size_t *len, flt **dst, bool external);
134 : gdk_export ssize_t fltToStr(str *dst, size_t *len, const flt *src, bool external);
135 : gdk_export ssize_t dblFromStr(const char *src, size_t *len, dbl **dst, bool external);
136 : gdk_export ssize_t dblToStr(str *dst, size_t *len, const dbl *src, bool external);
137 : gdk_export ssize_t GDKstrFromStr(unsigned char *restrict dst, const unsigned char *restrict src, ssize_t len, char quote);
138 : gdk_export ssize_t strFromStr(const char *restrict src, size_t *restrict len, str *restrict dst, bool external);
139 : gdk_export size_t escapedStrlen(const char *restrict src, const char *sep1, const char *sep2, int quote);
140 : gdk_export size_t escapedStr(char *restrict dst, const char *restrict src, size_t dstlen, const char *sep1, const char *sep2, int quote);
141 : /*
142 : * @- nil values
143 : * All types have a single value designated as a NIL value. It
144 : * designates a missing value and it is ignored (forbidden) in several
145 : * primitives. The current policy is to use the smallest value in any
146 : * ordered domain. The routine atomnil returns a pointer to the nil
147 : * value representation.
148 : */
149 : #define GDK_bit_max ((bit) 1)
150 : #define GDK_bit_min ((bit) 0)
151 : #define GDK_bte_max ((bte) INT8_MAX)
152 : #define GDK_bte_min ((bte) INT8_MIN+1)
153 : #define GDK_sht_max ((sht) INT16_MAX)
154 : #define GDK_sht_min ((sht) INT16_MIN+1)
155 : #define GDK_int_max ((int) INT32_MAX)
156 : #define GDK_int_min ((int) INT32_MIN+1)
157 : #define GDK_lng_max ((lng) INT64_MAX)
158 : #define GDK_lng_min ((lng) INT64_MIN+1)
159 : #ifdef HAVE_HGE
160 : #define GDK_hge_max ((((hge) 1) << 126) - 1 + (((hge) 1) << 126))
161 : #define GDK_hge_min (-GDK_hge_max)
162 : #endif
163 : #define GDK_flt_max ((flt) FLT_MAX)
164 : #define GDK_flt_min ((flt) -FLT_MAX)
165 : #define GDK_dbl_max ((dbl) DBL_MAX)
166 : #define GDK_dbl_min ((dbl) -DBL_MAX)
167 : #define GDK_oid_max (((oid) 1 << ((8 * SIZEOF_OID) - 1)) - 1)
168 : #define GDK_oid_min ((oid) 0)
169 : /* representation of the nil */
170 : gdk_export const bte bte_nil;
171 : gdk_export const sht sht_nil;
172 : gdk_export const int int_nil;
173 : #ifdef NAN_CANNOT_BE_USED_AS_INITIALIZER
174 : /* Definition of NAN is seriously broken on Intel compiler (at least
175 : * in some versions), so we work around it. */
176 : union _flt_nil_t {
177 : uint32_t l;
178 : flt f;
179 : };
180 : gdk_export const union _flt_nil_t _flt_nil_;
181 : #define flt_nil (_flt_nil_.f)
182 : union _dbl_nil_t {
183 : uint64_t l;
184 : dbl d;
185 : };
186 : gdk_export const union _dbl_nil_t _dbl_nil_;
187 : #define dbl_nil (_dbl_nil_.d)
188 : #else
189 : gdk_export const flt flt_nil;
190 : gdk_export const dbl dbl_nil;
191 : #endif
192 : gdk_export const lng lng_nil;
193 : #ifdef HAVE_HGE
194 : gdk_export const hge hge_nil;
195 : #endif
196 : gdk_export const oid oid_nil;
197 : gdk_export const char str_nil[2];
198 : gdk_export const ptr ptr_nil;
199 : gdk_export const uuid uuid_nil;
200 :
201 : /* derived NIL values - OIDDEPEND */
202 : #define bit_nil ((bit) bte_nil)
203 : #define bat_nil ((bat) int_nil)
204 :
205 : #define void_nil oid_nil
206 :
207 : #define is_bit_nil(v) ((v) == GDK_bte_min-1)
208 : #define is_bte_nil(v) ((v) == GDK_bte_min-1)
209 : #define is_sht_nil(v) ((v) == GDK_sht_min-1)
210 : #define is_int_nil(v) ((v) == GDK_int_min-1)
211 : #define is_lng_nil(v) ((v) == GDK_lng_min-1)
212 : #ifdef HAVE_HGE
213 : #define is_hge_nil(v) ((v) == GDK_hge_min-1)
214 : #endif
215 : #define is_oid_nil(v) ((v) == ((oid) 1 << ((8 * SIZEOF_OID) - 1)))
216 : #define is_flt_nil(v) isnan(v)
217 : #define is_dbl_nil(v) isnan(v)
218 : #define is_bat_nil(v) (((v) & 0x7FFFFFFF) == 0) /* v == bat_nil || v == 0 */
219 :
220 : #include <math.h>
221 :
222 : #if defined(_MSC_VER) && !defined(__INTEL_COMPILER) && _MSC_VER < 1800
223 : #include <float.h>
224 : #define isnan(x) _isnan(x)
225 : #define isinf(x) (_fpclass(x) & (_FPCLASS_NINF | _FPCLASS_PINF))
226 : #define isfinite(x) _finite(x)
227 : #endif
228 :
229 : #ifdef HAVE_HGE
230 : #define is_uuid_nil(x) ((x).h == 0)
231 : #else
232 : #define is_uuid_nil(x) (memcmp((x).u, uuid_nil.u, UUID_SIZE) == 0)
233 : #endif
234 :
235 : #define is_blob_nil(x) ((x)->nitems == ~(size_t)0)
236 :
237 : /*
238 : * @- Derived types
239 : * In all algorithms across GDK, you will find switches on the types
240 : * (bte, sht, int, flt, dbl, lng, hge, str). They respectively
241 : * represent an octet, a 16-bit int, a 32-bit int, a 32-bit float, a
242 : * 64-bit double, a 64-bit int, a 128-bit int, and a pointer-sized location
243 : * of a char-buffer (ended by a zero char).
244 : *
245 : * In contrast, the types (bit, ptr, bat, oid) are derived types. They
246 : * do not occur in the switches. The ATOMstorage macro maps them
247 : * respectively onto a @code{ bte}, @code{ int} (pointers are 32-bit),
248 : * @code{ int}, and @code{ int}. OIDs are 32-bit.
249 : *
250 : * This approach makes it tractable to switch to 64-bits OIDs, or to a
251 : * fully 64-bits OS easily. One only has to map the @code{ oid} and
252 : * @code{ ptr} types to @code{ lng} instead of @code{ int}.
253 : *
254 : * Derived types mimic their fathers in many ways. They inherit the
255 : * @code{ size}, @code{ linear}, and @code{ null}
256 : * properties of their father. The same goes for the
257 : * ADT functions HASH, CMP, PUT, NULL, DEL, LEN, and HEAP. So, a
258 : * derived type differs in only two ways from its father:
259 : * @table @code
260 : * @item [string representation]
261 : * the only two ADT operations specific for a derived type are FROMSTR
262 : * and TOSTR.
263 : * @item [identity]
264 : * (a @code{ bit} is really of a different type than @code{ bte}). The
265 : * set of operations on derived type values or BATs of such types may
266 : * differ from the sets of operations on the father type.
267 : * @end table
268 : */
269 : /* use "do ... while(0)" so that lhs can safely be used in if statements */
270 : #define ATOMstorage(t) BATatoms[t].storage
271 : #define ATOMsize(t) BATatoms[t].size
272 : #define ATOMfromstr(t,s,l,src,ext) BATatoms[t].atomFromStr(src,l,s,ext)
273 : #define ATOMnilptr(t) BATatoms[t].atomNull
274 : #define ATOMcompare(t) BATatoms[t].atomCmp
275 : #define ATOMcmp(t,l,r) ((*ATOMcompare(t))(l, r))
276 : #define ATOMhash(t,src) BATatoms[t].atomHash(src)
277 : #define ATOMdel(t,hp,src) do if (BATatoms[t].atomDel) BATatoms[t].atomDel(hp,src); while (0)
278 : #define ATOMvarsized(t) (BATatoms[t].atomPut != NULL)
279 : #define ATOMlinear(t) BATatoms[t].linear
280 : #define ATOMtype(t) ((t) == TYPE_void ? TYPE_oid : (t))
281 :
282 : /* The base type is the storage type if the comparison function, the
283 : * hash function, and the nil value are the same as those of the
284 : * storage type; otherwise it is the type itself. */
285 : #define ATOMbasetype(t) ((t) != ATOMstorage(t) && \
286 : ATOMnilptr(t) == ATOMnilptr(ATOMstorage(t)) && \
287 : ATOMcompare(t) == ATOMcompare(ATOMstorage(t)) && \
288 : BATatoms[t].atomHash == BATatoms[ATOMstorage(t)].atomHash ? \
289 : ATOMstorage(t) : (t))
290 :
291 : /*
292 : * In case that atoms are added to a bat, their logical reference
293 : * count should be incremented (and decremented if deleted). Notice
294 : * that BATs with atomic types that have logical references (e.g. BATs
295 : * of BATs but also BATs of ODMG odSet) can never be persistent, as
296 : * this would make the commit tremendously complicated.
297 : */
298 :
299 : static inline gdk_return __attribute__((__warn_unused_result__))
300 100984760 : ATOMputVAR(BAT *b, var_t *dst, const void *src)
301 : {
302 100984760 : assert(BATatoms[b->ttype].atomPut != NULL);
303 100984760 : if ((*BATatoms[b->ttype].atomPut)(b, dst, src) == (var_t) -1)
304 0 : return GDK_FAIL;
305 : return GDK_SUCCEED;
306 : }
307 :
308 :
309 : static inline gdk_return __attribute__((__warn_unused_result__))
310 527534800 : ATOMputFIX(int type, void *dst, const void *src)
311 : {
312 527534800 : assert(BATatoms[type].atomPut == NULL);
313 527534800 : switch (ATOMsize(type)) {
314 : case 0: /* void */
315 : break;
316 39092946 : case 1:
317 39092946 : * (bte *) dst = * (bte *) src;
318 39092946 : break;
319 16836138 : case 2:
320 16836138 : * (sht *) dst = * (sht *) src;
321 16836138 : break;
322 426047584 : case 4:
323 426047584 : * (int *) dst = * (int *) src;
324 426047584 : break;
325 29126133 : case 8:
326 29126133 : * (lng *) dst = * (lng *) src;
327 29126133 : break;
328 16431999 : case 16:
329 : #ifdef HAVE_HGE
330 16431999 : * (hge *) dst = * (hge *) src;
331 : #else
332 : * (uuid *) dst = * (uuid *) src;
333 : #endif
334 16431999 : break;
335 0 : default:
336 0 : memcpy(dst, src, ATOMsize(type));
337 0 : break;
338 : }
339 527534800 : return GDK_SUCCEED;
340 : }
341 :
342 : static inline gdk_return __attribute__((__warn_unused_result__))
343 1135741 : ATOMreplaceVAR(BAT *b, var_t *dst, const void *src)
344 : {
345 1135741 : var_t loc = *dst;
346 1135741 : int type = b->ttype;
347 :
348 1135741 : assert(BATatoms[type].atomPut != NULL);
349 1135741 : if ((*BATatoms[type].atomPut)(b, &loc, src) == (var_t) -1)
350 : return GDK_FAIL;
351 1135708 : ATOMdel(type, b->tvheap, dst);
352 1135710 : *dst = loc;
353 1135710 : return GDK_SUCCEED;
354 : }
355 :
356 : /* string heaps:
357 : * - strings are 8 byte aligned
358 : * - start with a 1024 bucket hash table
359 : * - heaps < 64KiB are fully duplicate eliminated with this hash tables
360 : * - heaps >= 64KiB are opportunistically (imperfect) duplicate
361 : * eliminated as only the last 128KiB chunk is considered and there
362 : * is no linked list
363 : * - buckets and next pointers are unsigned short "indices"
364 : * - indices should be multiplied by 8 and takes from ELIMBASE to get
365 : * an offset
366 : * Note that a 64KiB chunk of the heap contains at most 8K 8-byte
367 : * aligned strings. The 1K bucket list means that in worst load, the
368 : * list length is 8 (OK).
369 : */
370 : #define GDK_STRHASHTABLE (1<<10) /* 1024 */
371 : #define GDK_STRHASHMASK (GDK_STRHASHTABLE-1)
372 : #define GDK_STRHASHSIZE (GDK_STRHASHTABLE * sizeof(stridx_t))
373 : #define GDK_ELIMPOWER 16 /* 64KiB is the threshold */
374 : #define GDK_ELIMDOUBLES(h) ((h)->free < GDK_ELIMLIMIT)
375 : #define GDK_ELIMLIMIT (1<<GDK_ELIMPOWER) /* equivalently: ELIMBASE == 0 */
376 : #define GDK_ELIMBASE(x) (((x) >> GDK_ELIMPOWER) << GDK_ELIMPOWER)
377 : #define GDK_VAROFFSET ((var_t) GDK_STRHASHSIZE)
378 :
379 : /*
380 : * @- String Comparison, NILs and UTF-8
381 : *
382 : * Using the char* type for strings is handy as this is the type of
383 : * any constant strings in a C/C++ program. Therefore, MonetDB uses
384 : * this definition for str. However, different compilers and
385 : * platforms use either signed or unsigned characters for the char
386 : * type. It is required that string ordering in MonetDB is consistent
387 : * over platforms though.
388 : *
389 : * As for the choice how strings should be ordered, our support for
390 : * UTF-8 actually imposes that it should follow 'unsigned char'
391 : * doctrine (like in the AIX native compiler). In this semantics,
392 : * though we have to take corrective action to ensure that str(nil) is
393 : * the smallest value of the domain.
394 : */
395 : static inline bool __attribute__((__pure__))
396 333039 : strEQ(const char *l, const char *r)
397 : {
398 333039 : return strcmp(l, r) == 0;
399 : }
400 :
401 : static inline bool __attribute__((__pure__))
402 1482901676 : strNil(const char *s)
403 : {
404 1485532823 : return s == NULL || (s[0] == '\200' && s[1] == '\0');
405 : }
406 :
407 : static inline size_t __attribute__((__pure__))
408 54723311 : strLen(const char *s)
409 : {
410 108773789 : return strNil(s) ? 2 : strlen(s) + 1;
411 : }
412 :
413 : static inline int __attribute__((__pure__))
414 391381464 : strCmp(const char *l, const char *r)
415 : {
416 778912883 : return strNil(r)
417 221871688 : ? !strNil(l)
418 381824083 : : strNil(l) ? -1 : strcmp(l, r);
419 : }
420 :
421 : static inline size_t
422 535254735 : VarHeapVal(const void *b, BUN p, int w)
423 : {
424 535254735 : switch (w) {
425 192249308 : case 1:
426 192249308 : return (size_t) ((const uint8_t *) b)[p] + GDK_VAROFFSET;
427 71600753 : case 2:
428 71600753 : return (size_t) ((const uint16_t *) b)[p] + GDK_VAROFFSET;
429 217715146 : case 4:
430 217715146 : return (size_t) ((const uint32_t *) b)[p];
431 : #if SIZEOF_VAR_T == 8
432 53689528 : case 8:
433 53689528 : return (size_t) ((const uint64_t *) b)[p];
434 : #endif
435 : default:
436 0 : MT_UNREACHABLE();
437 : }
438 : }
439 :
440 : static inline BUN __attribute__((__pure__))
441 221864180 : strHash(const char *key)
442 : {
443 221864180 : BUN y = 0;
444 :
445 4284951353 : for (BUN i = 0; key[i]; i++) {
446 4063087173 : y += key[i];
447 4063087173 : y += (y << 10);
448 4063087173 : y ^= (y >> 6);
449 : }
450 221864180 : y += (y << 3);
451 221864180 : y ^= (y >> 11);
452 221864180 : y += (y << 15);
453 221864180 : return y;
454 : }
455 :
456 : #endif /* _GDK_ATOMS_H_ */
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