2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
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12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
18 Permission is hereby granted, free of charge, to any person obtaining
19 a copy of this software and associated documentation files (the
20 "Software"), to deal in the Software without restriction, including
21 without limitation the rights to use, copy, modify, merge, publish,
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23 permit persons to whom the Software is furnished to do so, subject to
24 the following conditions:
26 The above copyright notice and this permission notice shall be
27 included in all copies or substantial portions of the Software.
29 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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35 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 #ifndef included_vec_h
39 #define included_vec_h
41 #include <vppinfra/clib.h> /* word, etc */
42 #include <vppinfra/mem.h> /* clib_mem_free */
43 #include <vppinfra/string.h> /* memcpy, memmove */
44 #include <vppinfra/vec_bootstrap.h>
48 CLIB vectors are ubiquitous dynamically resized arrays with by user
49 defined "headers". Many CLIB data structures (e.g. hash, heap,
50 pool) are vectors with various different headers.
52 The memory layout looks like this:
55 user header (aligned to uword boundary)
56 vector length: number of elements
57 user's pointer-> vector element #0
62 The user pointer contains the address of vector element # 0. Null
63 pointer vectors are valid and mean a zero length vector.
65 You can reset the length of an allocated vector to zero via the
66 vec_reset_length(v) macro, or by setting the vector length field to
67 zero (e.g. _vec_len (v) = 0). Vec_reset_length(v) preferred: it
68 understands Null pointers.
70 Typically, the header is not present. Headers allow for other
71 data structures to be built atop CLIB vectors.
73 Users may specify the alignment for first data element of a vector
74 via the vec_*_aligned macros.
76 Vector elements can be any C type e.g. (int, double, struct bar).
77 This is also true for data types built atop vectors (e.g. heap,
80 Many macros have \_a variants supporting alignment of vector elements
81 and \_h variants supporting non-zero-length vector headers. The \_ha
82 variants support both. Additionally cacheline alignment within a
83 vector element structure can be specified using the
84 CLIB_CACHE_LINE_ALIGN_MARK() macro.
86 Standard programming error: memorize a pointer to the ith element
87 of a vector then expand it. Vectors expand by 3/2, so such code
88 may appear to work for a period of time. Memorize vector indices
92 /** \brief Low-level resize allocation function, usually not called directly
94 @param v pointer to a vector
95 @param length_increment length increment in elements
96 @param data_bytes requested size in bytes
97 @param header_bytes header size in bytes (may be zero)
98 @param data_align alignment (may be zero)
99 @return v_prime pointer to resized vector, may or may not equal v
101 void *vec_resize_allocate_memory (void *v, word length_increment,
102 uword data_bytes, uword header_bytes,
105 /** \brief Low-level vector resize function, usually not called directly
107 @param v pointer to a vector
108 @param length_increment length increment in elements
109 @param data_bytes requested size in bytes
110 @param header_bytes header size in bytes (may be zero)
111 @param data_align alignment (may be zero)
112 @return v_prime pointer to resized vector, may or may not equal v
115 #define _vec_resize(V, L, DB, HB, A) \
117 __typeof__ ((V)) _V; \
118 _V = _vec_resize_inline ((void *) V, L, DB, HB, \
119 clib_max ((__alignof__((V)[0])), (A))); \
124 _vec_resize_inline (void *v, word length_increment, uword data_bytes,
125 uword header_bytes, uword data_align)
127 vec_header_t *vh = _vec_find (v);
128 uword new_data_bytes, aligned_header_bytes;
130 aligned_header_bytes = vec_header_bytes (header_bytes);
132 new_data_bytes = data_bytes + aligned_header_bytes;
134 if (PREDICT_TRUE (v != 0))
136 void *p = v - aligned_header_bytes;
138 /* Vector header must start heap object. */
139 ASSERT (clib_mem_is_heap_object (p));
141 /* Typically we'll not need to resize. */
142 if (new_data_bytes <= clib_mem_size (p))
144 CLIB_MEM_UNPOISON (v, data_bytes);
145 vh->len += length_increment;
150 /* Slow path: call helper function. */
151 return vec_resize_allocate_memory (
152 v, length_increment, data_bytes, header_bytes,
153 clib_max (sizeof (vec_header_t), data_align));
156 /** \brief Determine if vector will resize with next allocation
158 @param v pointer to a vector
159 @param length_increment length increment in elements
160 @param data_bytes requested size in bytes
161 @param header_bytes header size in bytes (may be zero)
162 @param data_align alignment (may be zero)
163 @return 1 if vector will resize 0 otherwise
167 _vec_resize_will_expand (void *v, uword n_elts, uword elt_size)
169 if (PREDICT_TRUE (v != 0))
171 /* Vector header must start heap object. */
172 ASSERT (clib_mem_is_heap_object (vec_header (v)));
174 if (vec_mem_size (v) >= ((_vec_len (v) + n_elts)) * elt_size)
180 /** \brief Determine if vector will resize with next allocation
182 @param V pointer to a vector
183 @param N number of elements to add
184 @return 1 if vector will resize 0 otherwise
187 #define vec_resize_will_expand(V, N) \
188 _vec_resize_will_expand (V, N, sizeof ((V)[0]))
190 /** \brief Predicate function, says whether the supplied vector is a clib heap
193 @param v pointer to a vector
197 clib_mem_is_vec (void *v)
199 return clib_mem_is_heap_object (vec_header (v));
202 /* Local variable naming macro (prevents collisions with other macro naming). */
203 #define _v(var) _vec_##var
205 /** \brief Resize a vector (general version).
206 Add N elements to end of given vector V, return pointer to start of vector.
207 Vector will have room for H header bytes and will have user's data aligned
208 at alignment A (rounded to next power of 2).
210 @param V pointer to a vector
211 @param N number of elements to add
212 @param H header size in bytes (may be zero)
213 @param A alignment (may be zero)
214 @return V (value-result macro parameter)
217 #define vec_resize_ha(V, N, H, A) \
221 word _v (l) = vec_len (V); \
222 V = _vec_resize ((V), _v (n), (_v (l) + _v (n)) * sizeof ((V)[0]), (H), \
227 /** \brief Resize a vector (no header, unspecified alignment)
228 Add N elements to end of given vector V, return pointer to start of vector.
229 Vector will have room for H header bytes and will have user's data aligned
230 at alignment A (rounded to next power of 2).
232 @param V pointer to a vector
233 @param N number of elements to add
234 @return V (value-result macro parameter)
236 #define vec_resize(V,N) vec_resize_ha(V,N,0,0)
238 /** \brief Resize a vector (no header, alignment specified).
239 Add N elements to end of given vector V, return pointer to start of vector.
240 Vector will have room for H header bytes and will have user's data aligned
241 at alignment A (rounded to next power of 2).
243 @param V pointer to a vector
244 @param N number of elements to add
245 @param A alignment (may be zero)
246 @return V (value-result macro parameter)
249 #define vec_resize_aligned(V,N,A) vec_resize_ha(V,N,0,A)
251 /** \brief Allocate space for N more elements
253 @param V pointer to a vector
254 @param N number of elements to add
255 @param H header size in bytes (may be zero)
256 @param A alignment (may be zero)
257 @return V (value-result macro parameter)
260 #define vec_alloc_ha(V,N,H,A) \
262 uword _v(l) = vec_len (V); \
263 vec_resize_ha (V, N, H, A); \
264 _vec_len (V) = _v(l); \
267 /** \brief Allocate space for N more elements
268 (no header, unspecified alignment)
270 @param V pointer to a vector
271 @param N number of elements to add
272 @return V (value-result macro parameter)
274 #define vec_alloc(V,N) vec_alloc_ha(V,N,0,0)
276 /** \brief Allocate space for N more elements (no header, given alignment)
277 @param V pointer to a vector
278 @param N number of elements to add
279 @param A alignment (may be zero)
280 @return V (value-result macro parameter)
283 #define vec_alloc_aligned(V,N,A) vec_alloc_ha(V,N,0,A)
285 /** \brief Create new vector of given type and length (general version).
286 @param T type of elements in new vector
287 @param N number of elements to add
288 @param H header size in bytes (may be zero)
289 @param A alignment (may be zero)
292 #define vec_new_ha(T,N,H,A) \
295 (T *)_vec_resize ((T *) 0, _v(n), _v(n) * sizeof (T), (H), (A)); \
298 /** \brief Create new vector of given type and length
299 (unspecified alignment, no header).
301 @param T type of elements in new vector
302 @param N number of elements to add
305 #define vec_new(T,N) vec_new_ha(T,N,0,0)
306 /** \brief Create new vector of given type and length
307 (alignment specified, no header).
309 @param T type of elements in new vector
310 @param N number of elements to add
311 @param A alignment (may be zero)
314 #define vec_new_aligned(T,N,A) vec_new_ha(T,N,0,A)
316 /** \brief Free vector's memory (no header).
317 @param V pointer to a vector
318 @return V (value-result parameter, V=0)
320 #define vec_free(V) \
325 clib_mem_free (vec_header ((V))); \
331 void vec_free_not_inline (void *v);
333 /**\brief Free vector user header (syntactic sugar)
334 @param h vector header
337 #define vec_free_header(h) clib_mem_free (h)
339 /** \brief Return copy of vector (general version).
341 @param V pointer to a vector
342 @param H size of header in bytes
343 @param A alignment (may be zero)
345 @return Vdup copy of vector
348 #define vec_dup_ha(V, H, A) \
350 __typeof__ ((V)[0]) *_v (v) = 0; \
351 uword _v (l) = vec_len (V); \
354 vec_resize_ha (_v (v), _v (l), (H), (A)); \
355 clib_memcpy_fast (_v (v), (V), _v (l) * sizeof ((V)[0])); \
360 /** \brief Return copy of vector (no header, no alignment)
362 @param V pointer to a vector
363 @return Vdup copy of vector
365 #define vec_dup(V) vec_dup_ha(V,0,0)
367 /** \brief Return copy of vector (no header, alignment specified).
369 @param V pointer to a vector
370 @param A alignment (may be zero)
372 @return Vdup copy of vector
374 #define vec_dup_aligned(V,A) vec_dup_ha(V,0,A)
376 /** \brief Copy a vector, memcpy wrapper. Assumes sizeof(SRC[0]) ==
379 @param DST destination
382 #define vec_copy(DST,SRC) clib_memcpy_fast (DST, SRC, vec_len (DST) * \
385 /** \brief Clone a vector. Make a new vector with the
386 same size as a given vector but possibly with a different type.
388 @param NEW_V pointer to new vector
389 @param OLD_V pointer to old vector
391 #define vec_clone(NEW_V,OLD_V) \
394 (NEW_V) = _vec_resize ((NEW_V), vec_len (OLD_V), \
395 vec_len (OLD_V) * sizeof ((NEW_V)[0]), (0), (0)); \
398 /** \brief Make sure vector is long enough for given index (general version).
400 @param V (possibly NULL) pointer to a vector.
401 @param I vector index which will be valid upon return
402 @param H header size in bytes (may be zero)
403 @param A alignment (may be zero)
404 @return V (value-result macro parameter)
407 #define vec_validate_ha(V, I, H, A) \
410 STATIC_ASSERT (A == 0 || ((A % sizeof (V[0])) == 0) || \
411 ((sizeof (V[0]) % A) == 0), \
412 "vector validate aligned on incorrectly sized object"); \
414 word _v (l) = vec_len (V); \
415 if (_v (i) >= _v (l)) \
417 vec_resize_ha ((V), 1 + (_v (i) - _v (l)), (H), (A)); \
418 /* Must zero new space since user may have previously \
419 used e.g. _vec_len (v) -= 10 */ \
420 clib_memset ((V) + _v (l), 0, \
421 (1 + (_v (i) - _v (l))) * sizeof ((V)[0])); \
426 /** \brief Make sure vector is long enough for given index
427 (no header, unspecified alignment)
429 @param V (possibly NULL) pointer to a vector.
430 @param I vector index which will be valid upon return
431 @return V (value-result macro parameter)
433 #define vec_validate(V,I) vec_validate_ha(V,I,0,0)
435 /** \brief Make sure vector is long enough for given index
436 (no header, specified alignment)
438 @param V (possibly NULL) pointer to a vector.
439 @param I vector index which will be valid upon return
440 @param A alignment (may be zero)
441 @return V (value-result macro parameter)
444 #define vec_validate_aligned(V,I,A) vec_validate_ha(V,I,0,A)
446 /** \brief Make sure vector is long enough for given index
447 and initialize empty space (general version)
449 @param V (possibly NULL) pointer to a vector.
450 @param I vector index which will be valid upon return
451 @param INIT initial value (can be a complex expression!)
452 @param H header size in bytes (may be zero)
453 @param A alignment (may be zero)
454 @return V (value-result macro parameter)
456 #define vec_validate_init_empty_ha(V,I,INIT,H,A) \
459 word _v(l) = vec_len (V); \
460 if (_v(i) >= _v(l)) \
462 vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
463 while (_v(l) <= _v(i)) \
465 (V)[_v(l)] = (INIT); \
471 /** \brief Make sure vector is long enough for given index
472 and initialize empty space (no header, unspecified alignment)
474 @param V (possibly NULL) pointer to a vector.
475 @param I vector index which will be valid upon return
476 @param INIT initial value (can be a complex expression!)
477 @return V (value-result macro parameter)
480 #define vec_validate_init_empty(V,I,INIT) \
481 vec_validate_init_empty_ha(V,I,INIT,0,0)
483 /** \brief Make sure vector is long enough for given index
484 and initialize empty space (no header, alignment alignment)
486 @param V (possibly NULL) pointer to a vector.
487 @param I vector index which will be valid upon return
488 @param INIT initial value (can be a complex expression!)
489 @param A alignment (may be zero)
490 @return V (value-result macro parameter)
492 #define vec_validate_init_empty_aligned(V,I,INIT,A) \
493 vec_validate_init_empty_ha(V,I,INIT,0,A)
495 /** \brief Add 1 element to end of vector (general version).
497 @param V pointer to a vector
498 @param E element to add
499 @param H header size in bytes (may be zero)
500 @param A alignment (may be zero)
501 @return V (value-result macro parameter)
503 #define vec_add1_ha(V,E,H,A) \
505 word _v(l) = vec_len (V); \
506 V = _vec_resize ((V), 1, (_v(l) + 1) * sizeof ((V)[0]), (H), (A)); \
510 /** \brief Add 1 element to end of vector (unspecified alignment).
512 @param V pointer to a vector
513 @param E element to add
514 @return V (value-result macro parameter)
516 #define vec_add1(V,E) vec_add1_ha(V,E,0,0)
518 /** \brief Add 1 element to end of vector (alignment specified).
520 @param V pointer to a vector
521 @param E element to add
522 @param A alignment (may be zero)
523 @return V (value-result macro parameter)
525 #define vec_add1_aligned(V,E,A) vec_add1_ha(V,E,0,A)
527 /** \brief Add N elements to end of vector V,
528 return pointer to new elements in P. (general version)
530 @param V pointer to a vector
531 @param P pointer to new vector element(s)
532 @param N number of elements to add
533 @param H header size in bytes (may be zero)
534 @param A alignment (may be zero)
535 @return V and P (value-result macro parameters)
537 #define vec_add2_ha(V,P,N,H,A) \
540 word _v(l) = vec_len (V); \
541 V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
545 /** \brief Add N elements to end of vector V,
546 return pointer to new elements in P. (no header, unspecified alignment)
548 @param V pointer to a vector
549 @param P pointer to new vector element(s)
550 @param N number of elements to add
551 @return V and P (value-result macro parameters)
554 #define vec_add2(V,P,N) vec_add2_ha(V,P,N,0,0)
556 /** \brief Add N elements to end of vector V,
557 return pointer to new elements in P. (no header, alignment specified)
559 @param V pointer to a vector
560 @param P pointer to new vector element(s)
561 @param N number of elements to add
562 @param A alignment (may be zero)
563 @return V and P (value-result macro parameters)
566 #define vec_add2_aligned(V,P,N,A) vec_add2_ha(V,P,N,0,A)
568 /** \brief Add N elements to end of vector V (general version)
570 @param V pointer to a vector
571 @param E pointer to element(s) to add
572 @param N number of elements to add
573 @param H header size in bytes (may be zero)
574 @param A alignment (may be zero)
575 @return V (value-result macro parameter)
577 #define vec_add_ha(V, E, N, H, A) \
581 if (PREDICT_TRUE (_v (n) > 0)) \
583 word _v (l) = vec_len (V); \
584 V = _vec_resize ((V), _v (n), (_v (l) + _v (n)) * sizeof ((V)[0]), \
586 clib_memcpy_fast ((V) + _v (l), (E), _v (n) * sizeof ((V)[0])); \
591 /** \brief Add N elements to end of vector V (no header, unspecified alignment)
593 @param V pointer to a vector
594 @param E pointer to element(s) to add
595 @param N number of elements to add
596 @return V (value-result macro parameter)
598 #define vec_add(V,E,N) vec_add_ha(V,E,N,0,0)
600 /** \brief Add N elements to end of vector V (no header, specified alignment)
602 @param V pointer to a vector
603 @param E pointer to element(s) to add
604 @param N number of elements to add
605 @param A alignment (may be zero)
606 @return V (value-result macro parameter)
608 #define vec_add_aligned(V,E,N,A) vec_add_ha(V,E,N,0,A)
610 /** \brief Returns last element of a vector and decrements its length
612 @param V pointer to a vector
613 @return E element removed from the end of the vector
617 uword _v(l) = vec_len (V); \
618 ASSERT (_v(l) > 0); \
620 _vec_len (V) = _v (l); \
624 /** \brief Set E to the last element of a vector, decrement vector length
625 @param V pointer to a vector
626 @param E pointer to the last vector element
627 @return E element removed from the end of the vector
628 (value-result macro parameter
631 #define vec_pop2(V,E) \
633 uword _v(l) = vec_len (V); \
634 if (_v(l) > 0) (E) = vec_pop (V); \
638 /** \brief Insert N vector elements starting at element M,
639 initialize new elements (general version).
641 @param V (possibly NULL) pointer to a vector.
642 @param N number of elements to insert
643 @param M insertion point
644 @param INIT initial value (can be a complex expression!)
645 @param H header size in bytes (may be zero)
646 @param A alignment (may be zero)
647 @return V (value-result macro parameter)
649 #define vec_insert_init_empty_ha(V,N,M,INIT,H,A) \
651 word _v(l) = vec_len (V); \
654 V = _vec_resize ((V), \
656 (_v(l) + _v(n))*sizeof((V)[0]), \
658 ASSERT (_v(m) <= _v(l)); \
659 memmove ((V) + _v(m) + _v(n), \
661 (_v(l) - _v(m)) * sizeof ((V)[0])); \
662 clib_memset ((V) + _v(m), INIT, _v(n) * sizeof ((V)[0])); \
665 /** \brief Insert N vector elements starting at element M,
666 initialize new elements to zero (general version)
668 @param V (possibly NULL) pointer to a vector.
669 @param N number of elements to insert
670 @param M insertion point
671 @param H header size in bytes (may be zero)
672 @param A alignment (may be zero)
673 @return V (value-result macro parameter)
675 #define vec_insert_ha(V,N,M,H,A) vec_insert_init_empty_ha(V,N,M,0,H,A)
677 /** \brief Insert N vector elements starting at element M,
678 initialize new elements to zero (no header, unspecified alignment)
680 @param V (possibly NULL) pointer to a vector.
681 @param N number of elements to insert
682 @param M insertion point
683 @return V (value-result macro parameter)
685 #define vec_insert(V,N,M) vec_insert_ha(V,N,M,0,0)
687 /** \brief Insert N vector elements starting at element M,
688 initialize new elements to zero (no header, alignment specified)
690 @param V (possibly NULL) pointer to a vector.
691 @param N number of elements to insert
692 @param M insertion point
693 @param A alignment (may be zero)
694 @return V (value-result macro parameter)
696 #define vec_insert_aligned(V,N,M,A) vec_insert_ha(V,N,M,0,A)
698 /** \brief Insert N vector elements starting at element M,
699 initialize new elements (no header, unspecified alignment)
701 @param V (possibly NULL) pointer to a vector.
702 @param N number of elements to insert
703 @param M insertion point
704 @param INIT initial value (can be a complex expression!)
705 @return V (value-result macro parameter)
708 #define vec_insert_init_empty(V,N,M,INIT) \
709 vec_insert_init_empty_ha(V,N,M,INIT,0,0)
710 /* Resize vector by N elements starting from element M, initialize new elements to INIT (alignment specified, no header). */
712 /** \brief Insert N vector elements starting at element M,
713 initialize new elements (no header, specified alignment)
715 @param V (possibly NULL) pointer to a vector.
716 @param N number of elements to insert
717 @param M insertion point
718 @param INIT initial value (can be a complex expression!)
719 @param A alignment (may be zero)
720 @return V (value-result macro parameter)
722 #define vec_insert_init_empty_aligned(V,N,M,INIT,A) \
723 vec_insert_init_empty_ha(V,N,M,INIT,0,A)
725 /** \brief Insert N vector elements starting at element M,
726 insert given elements (general version)
728 @param V (possibly NULL) pointer to a vector.
729 @param E element(s) to insert
730 @param N number of elements to insert
731 @param M insertion point
732 @param H header size in bytes (may be zero)
733 @param A alignment (may be zero)
734 @return V (value-result macro parameter)
737 #define vec_insert_elts_ha(V, E, N, M, H, A) \
741 if (PREDICT_TRUE (_v (n) > 0)) \
743 word _v (l) = vec_len (V); \
745 V = _vec_resize ((V), _v (n), (_v (l) + _v (n)) * sizeof ((V)[0]), \
747 ASSERT (_v (m) <= _v (l)); \
748 memmove ((V) + _v (m) + _v (n), (V) + _v (m), \
749 (_v (l) - _v (m)) * sizeof ((V)[0])); \
750 clib_memcpy_fast ((V) + _v (m), (E), _v (n) * sizeof ((V)[0])); \
755 /** \brief Insert N vector elements starting at element M,
756 insert given elements (no header, unspecified alignment)
758 @param V (possibly NULL) pointer to a vector.
759 @param E element(s) to insert
760 @param N number of elements to insert
761 @param M insertion point
762 @return V (value-result macro parameter)
764 #define vec_insert_elts(V,E,N,M) vec_insert_elts_ha(V,E,N,M,0,0)
766 /** \brief Insert N vector elements starting at element M,
767 insert given elements (no header, specified alignment)
769 @param V (possibly NULL) pointer to a vector.
770 @param E element(s) to insert
771 @param N number of elements to insert
772 @param M insertion point
773 @param A alignment (may be zero)
774 @return V (value-result macro parameter)
776 #define vec_insert_elts_aligned(V,E,N,M,A) vec_insert_elts_ha(V,E,N,M,0,A)
778 /** \brief Delete N elements starting at element M
780 @param V pointer to a vector
781 @param N number of elements to delete
782 @param M first element to delete
783 @return V (value-result macro parameter)
785 #define vec_delete(V,N,M) \
787 word _v(l) = vec_len (V); \
790 /* Copy over deleted elements. */ \
791 if (_v(l) - _v(n) - _v(m) > 0) \
792 memmove ((V) + _v(m), (V) + _v(m) + _v(n), \
793 (_v(l) - _v(n) - _v(m)) * sizeof ((V)[0])); \
794 /* Zero empty space at end (for future re-allocation). */ \
796 clib_memset ((V) + _v(l) - _v(n), 0, _v(n) * sizeof ((V)[0])); \
797 _vec_len (V) -= _v(n); \
798 CLIB_MEM_POISON(vec_end(V), _v(n) * sizeof ((V)[0])); \
801 /** \brief Delete the element at index I
803 @param V pointer to a vector
804 @param I index to delete
806 #define vec_del1(v,i) \
808 uword _vec_del_l = _vec_len (v) - 1; \
809 uword _vec_del_i = (i); \
810 if (_vec_del_i < _vec_del_l) \
811 (v)[_vec_del_i] = (v)[_vec_del_l]; \
812 _vec_len (v) = _vec_del_l; \
813 CLIB_MEM_POISON(vec_end(v), sizeof ((v)[0])); \
816 /** \brief Append v2 after v1. Result in v1.
817 @param V1 target vector
818 @param V2 vector to append
821 #define vec_append(v1, v2) \
824 uword _v (l1) = vec_len (v1); \
825 uword _v (l2) = vec_len (v2); \
827 if (PREDICT_TRUE (_v (l2) > 0)) \
829 v1 = _vec_resize ((v1), _v (l2), \
830 (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, 0); \
831 clib_memcpy_fast ((v1) + _v (l1), (v2), \
832 _v (l2) * sizeof ((v2)[0])); \
837 /** \brief Append v2 after v1. Result in v1. Specified alignment.
838 @param V1 target vector
839 @param V2 vector to append
840 @param align required alignment
843 #define vec_append_aligned(v1, v2, align) \
846 uword _v (l1) = vec_len (v1); \
847 uword _v (l2) = vec_len (v2); \
849 if (PREDICT_TRUE (_v (l2) > 0)) \
852 (v1), _v (l2), (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, align); \
853 clib_memcpy_fast ((v1) + _v (l1), (v2), \
854 _v (l2) * sizeof ((v2)[0])); \
859 /** \brief Prepend v2 before v1. Result in v1.
860 @param V1 target vector
861 @param V2 vector to prepend
864 #define vec_prepend(v1, v2) \
867 uword _v (l1) = vec_len (v1); \
868 uword _v (l2) = vec_len (v2); \
870 if (PREDICT_TRUE (_v (l2) > 0)) \
872 v1 = _vec_resize ((v1), _v (l2), \
873 (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, 0); \
874 memmove ((v1) + _v (l2), (v1), _v (l1) * sizeof ((v1)[0])); \
875 clib_memcpy_fast ((v1), (v2), _v (l2) * sizeof ((v2)[0])); \
880 /** \brief Prepend v2 before v1. Result in v1. Specified alignment
881 @param V1 target vector
882 @param V2 vector to prepend
883 @param align required alignment
886 #define vec_prepend_aligned(v1, v2, align) \
889 uword _v (l1) = vec_len (v1); \
890 uword _v (l2) = vec_len (v2); \
892 if (PREDICT_TRUE (_v (l2) > 0)) \
895 (v1), _v (l2), (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, align); \
896 memmove ((v1) + _v (l2), (v1), _v (l1) * sizeof ((v1)[0])); \
897 clib_memcpy_fast ((v1), (v2), _v (l2) * sizeof ((v2)[0])); \
902 /** \brief Zero all vector elements. Null-pointer tolerant.
903 @param var Vector to zero
905 #define vec_zero(var) \
908 clib_memset ((var), 0, vec_len (var) * sizeof ((var)[0])); \
911 /** \brief Set all vector elements to given value. Null-pointer tolerant.
912 @param v vector to set
913 @param val value for each vector element
915 #define vec_set(v,val) \
918 __typeof__ ((v)[0]) _val = (val); \
919 for (_v(i) = 0; _v(i) < vec_len (v); _v(i)++) \
924 #include <stdlib.h> /* for qsort */
927 /** \brief Compare two vectors, not NULL-pointer tolerant
929 @param v1 Pointer to a vector
930 @param v2 Pointer to a vector
931 @return 1 if equal, 0 if unequal
933 #define vec_is_equal(v1,v2) \
934 (vec_len (v1) == vec_len (v2) && ! memcmp ((v1), (v2), vec_len (v1) * sizeof ((v1)[0])))
936 /** \brief Compare two vectors (only applicable to vectors of signed numbers).
937 Used in qsort compare functions.
939 @param v1 Pointer to a vector
940 @param v2 Pointer to a vector
943 #define vec_cmp(v1,v2) \
945 word _v(i), _v(cmp), _v(l); \
946 _v(l) = clib_min (vec_len (v1), vec_len (v2)); \
948 for (_v(i) = 0; _v(i) < _v(l); _v(i)++) { \
949 _v(cmp) = (v1)[_v(i)] - (v2)[_v(i)]; \
953 if (_v(cmp) == 0 && _v(l) > 0) \
954 _v(cmp) = vec_len(v1) - vec_len(v2); \
955 (_v(cmp) < 0 ? -1 : (_v(cmp) > 0 ? +1 : 0)); \
958 /** \brief Search a vector for the index of the entry that matches.
960 @param v Pointer to a vector
961 @param E Entry to match
962 @return index of match or ~0
964 #define vec_search(v,E) \
967 while (_v(i) < vec_len(v)) \
969 if ((v)[_v(i)] == E) \
973 if (_v(i) == vec_len(v)) \
978 /** \brief Search a vector for the index of the entry that matches.
980 @param v Pointer to a vector
981 @param E Pointer to entry to match
982 @param fn Comparison function !0 => match
983 @return index of match or ~0
985 #define vec_search_with_function(v,E,fn) \
988 while (_v(i) < vec_len(v)) \
990 if (0 != fn(&(v)[_v(i)], (E))) \
994 if (_v(i) == vec_len(v)) \
999 /** \brief Sort a vector using the supplied element comparison function
1001 Does not depend on the underlying implementation to deal correctly
1002 with null, zero-long, or 1-long vectors
1004 @param vec vector to sort
1005 @param f comparison function
1007 #define vec_sort_with_function(vec,f) \
1009 if (vec_len (vec) > 1) \
1010 qsort (vec, vec_len (vec), sizeof (vec[0]), (void *) (f)); \
1013 /** \brief Make a vector containing a NULL terminated c-string.
1015 @param V (possibly NULL) pointer to a vector.
1016 @param S pointer to string buffer.
1017 @param L string length (NOT including the terminating NULL; a la strlen())
1019 #define vec_validate_init_c_string(V, S, L) \
1021 vec_reset_length (V); \
1022 vec_validate ((V), (L)); \
1024 clib_memcpy_fast ((V), (S), (L)); \
1029 /** \brief Test whether a vector is a NULL terminated c-string.
1031 @param V (possibly NULL) pointer to a vector.
1032 @return BOOLEAN indicating if the vector c-string is null terminated.
1034 #define vec_c_string_is_terminated(V) \
1035 (((V) != 0) && (vec_len (V) != 0) && ((V)[vec_len ((V)) - 1] == 0))
1037 /** \brief (If necessary) NULL terminate a vector containing a c-string.
1039 @param V (possibly NULL) pointer to a vector.
1040 @return V (value-result macro parameter)
1042 #define vec_terminate_c_string(V) \
1044 u32 vl = vec_len ((V)); \
1045 if (!vec_c_string_is_terminated(V)) \
1047 vec_validate ((V), vl); \
1052 #endif /* included_vec_h */
1056 * fd.io coding-style-patch-verification: ON
1059 * eval: (c-set-style "gnu")