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authorDamjan Marion <damarion@cisco.com>2016-12-19 23:05:39 +0100
committerDamjan Marion <damarion@cisco.com>2016-12-28 12:25:14 +0100
commit7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 (patch)
tree5de62f8dbd3a752f5a676ca600e43d2652d1ff1a /src/vppinfra/vec.h
parent696f1adec0df3b8f161862566dd9c86174302658 (diff)
Reorganize source tree to use single autotools instance
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/vec.h')
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+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef included_vec_h
+#define included_vec_h
+
+#include <vppinfra/clib.h> /* word, etc */
+#include <vppinfra/mem.h> /* clib_mem_free */
+#include <vppinfra/string.h> /* memcpy, memmove */
+#include <vppinfra/vec_bootstrap.h>
+
+/** \file
+
+ CLIB vectors are ubiquitous dynamically resized arrays with by user
+ defined "headers". Many CLIB data structures (e.g. hash, heap,
+ pool) are vectors with various different headers.
+
+ The memory layout looks like this:
+
+~~~~~~~~
+ user header (aligned to uword boundary)
+ vector length: number of elements
+ user's pointer-> vector element #0
+ vector element #1
+ ...
+~~~~~~~~
+
+ The user pointer contains the address of vector element # 0. Null
+ pointer vectors are valid and mean a zero length vector.
+
+ You can reset the length of an allocated vector to zero via the
+ vec_reset_length(v) macro, or by setting the vector length field to
+ zero (e.g. _vec_len (v) = 0). Vec_reset_length(v) preferred: it
+ understands Null pointers.
+
+ Typically, the header is not present. Headers allow for other
+ data structures to be built atop CLIB vectors.
+
+ Users may specify the alignment for data elements via the
+ vec_*_aligned macros.
+
+ Vectors elements can be any C type e.g. (int, double, struct bar).
+ This is also true for data types built atop vectors (e.g. heap,
+ pool, etc.).
+
+ Many macros have _a variants supporting alignment of vector data
+ and _h variants supporting non zero length vector headers.
+ The _ha variants support both.
+
+ Standard programming error: memorize a pointer to the ith element
+ of a vector then expand it. Vectors expand by 3/2, so such code
+ may appear to work for a period of time. Memorize vector indices
+ which are invariant.
+ */
+
+/** \brief Low-level resize allocation function, usually not called directly
+
+ @param v pointer to a vector
+ @param length_increment length increment in elements
+ @param data_bytes requested size in bytes
+ @param header_bytes header size in bytes (may be zero)
+ @param data_align alignment (may be zero)
+ @return v_prime pointer to resized vector, may or may not equal v
+*/
+void *vec_resize_allocate_memory (void *v,
+ word length_increment,
+ uword data_bytes,
+ uword header_bytes, uword data_align);
+
+/** \brief Low-level vector resize function, usually not called directly
+
+ @param v pointer to a vector
+ @param length_increment length increment in elements
+ @param data_bytes requested size in bytes
+ @param header_bytes header size in bytes (may be zero)
+ @param data_align alignment (may be zero)
+ @return v_prime pointer to resized vector, may or may not equal v
+*/
+
+always_inline void *
+_vec_resize (void *v,
+ word length_increment,
+ uword data_bytes, uword header_bytes, uword data_align)
+{
+ vec_header_t *vh = _vec_find (v);
+ uword new_data_bytes, aligned_header_bytes;
+
+ aligned_header_bytes = vec_header_bytes (header_bytes);
+
+ new_data_bytes = data_bytes + aligned_header_bytes;
+
+ if (PREDICT_TRUE (v != 0))
+ {
+ void *p = v - aligned_header_bytes;
+
+ /* Vector header must start heap object. */
+ ASSERT (clib_mem_is_heap_object (p));
+
+ /* Typically we'll not need to resize. */
+ if (new_data_bytes <= clib_mem_size (p))
+ {
+ vh->len += length_increment;
+ return v;
+ }
+ }
+
+ /* Slow path: call helper function. */
+ return vec_resize_allocate_memory (v, length_increment, data_bytes,
+ header_bytes,
+ clib_max (sizeof (vec_header_t),
+ data_align));
+}
+
+/** \brief Predicate function, says whether the supplied vector is a clib heap
+ object (general version).
+
+ @param v pointer to a vector
+ @param header_bytes vector header size in bytes (may be zero)
+ @return 0 or 1
+*/
+uword clib_mem_is_vec_h (void *v, uword header_bytes);
+
+
+/** \brief Predicate function, says whether the supplied vector is a clib heap
+ object
+
+ @param v pointer to a vector
+ @return 0 or 1
+*/
+always_inline uword
+clib_mem_is_vec (void *v)
+{
+ return clib_mem_is_vec_h (v, 0);
+}
+
+/* Local variable naming macro (prevents collisions with other macro naming). */
+#define _v(var) _vec_##var
+
+/** \brief Resize a vector (general version).
+ Add N elements to end of given vector V, return pointer to start of vector.
+ Vector will have room for H header bytes and will have user's data aligned
+ at alignment A (rounded to next power of 2).
+
+ @param V pointer to a vector
+ @param N number of elements to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_resize_ha(V,N,H,A) \
+do { \
+ word _v(n) = (N); \
+ word _v(l) = vec_len (V); \
+ V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
+} while (0)
+
+/** \brief Resize a vector (no header, unspecified alignment)
+ Add N elements to end of given vector V, return pointer to start of vector.
+ Vector will have room for H header bytes and will have user's data aligned
+ at alignment A (rounded to next power of 2).
+
+ @param V pointer to a vector
+ @param N number of elements to add
+ @return V (value-result macro parameter)
+*/
+#define vec_resize(V,N) vec_resize_ha(V,N,0,0)
+
+/** \brief Resize a vector (no header, alignment specified).
+ Add N elements to end of given vector V, return pointer to start of vector.
+ Vector will have room for H header bytes and will have user's data aligned
+ at alignment A (rounded to next power of 2).
+
+ @param V pointer to a vector
+ @param N number of elements to add
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_resize_aligned(V,N,A) vec_resize_ha(V,N,0,A)
+
+/** \brief Allocate space for N more elements
+
+ @param V pointer to a vector
+ @param N number of elements to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_alloc_ha(V,N,H,A) \
+do { \
+ uword _v(l) = vec_len (V); \
+ vec_resize_ha (V, N, H, A); \
+ _vec_len (V) = _v(l); \
+} while (0)
+
+/** \brief Allocate space for N more elements
+ (no header, unspecified alignment)
+
+ @param V pointer to a vector
+ @param N number of elements to add
+ @return V (value-result macro parameter)
+*/
+#define vec_alloc(V,N) vec_alloc_ha(V,N,0,0)
+
+/** \brief Allocate space for N more elements (no header, given alignment)
+ @param V pointer to a vector
+ @param N number of elements to add
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_alloc_aligned(V,N,A) vec_alloc_ha(V,N,0,A)
+
+/** \brief Create new vector of given type and length (general version).
+ @param T type of elements in new vector
+ @param N number of elements to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V new vector
+*/
+#define vec_new_ha(T,N,H,A) \
+({ \
+ word _v(n) = (N); \
+ _vec_resize ((T *) 0, _v(n), _v(n) * sizeof (T), (H), (A)); \
+})
+
+/** \brief Create new vector of given type and length
+ (unspecified alignment, no header).
+
+ @param T type of elements in new vector
+ @param N number of elements to add
+ @return V new vector
+*/
+#define vec_new(T,N) vec_new_ha(T,N,0,0)
+/** \brief Create new vector of given type and length
+ (alignment specified, no header).
+
+ @param T type of elements in new vector
+ @param N number of elements to add
+ @param A alignment (may be zero)
+ @return V new vector
+*/
+#define vec_new_aligned(T,N,A) vec_new_ha(T,N,0,A)
+
+/** \brief Free vector's memory (general version)
+
+ @param V pointer to a vector
+ @param H size of header in bytes
+ @return V (value-result parameter, V=0)
+*/
+#define vec_free_h(V,H) \
+do { \
+ if (V) \
+ { \
+ clib_mem_free (vec_header ((V), (H))); \
+ V = 0; \
+ } \
+} while (0)
+
+/** \brief Free vector's memory (no header).
+ @param V pointer to a vector
+ @return V (value-result parameter, V=0)
+*/
+#define vec_free(V) vec_free_h(V,0)
+
+/**\brief Free vector user header (syntactic sugar)
+ @param h vector header
+ @void
+*/
+#define vec_free_header(h) clib_mem_free (h)
+
+/** \brief Return copy of vector (general version).
+
+ @param V pointer to a vector
+ @param H size of header in bytes
+ @param A alignment (may be zero)
+
+ @return Vdup copy of vector
+*/
+
+#define vec_dup_ha(V,H,A) \
+({ \
+ __typeof__ ((V)[0]) * _v(v) = 0; \
+ uword _v(l) = vec_len (V); \
+ if (_v(l) > 0) \
+ { \
+ vec_resize_ha (_v(v), _v(l), (H), (A)); \
+ clib_memcpy (_v(v), (V), _v(l) * sizeof ((V)[0]));\
+ } \
+ _v(v); \
+})
+
+/** \brief Return copy of vector (no header, no alignment)
+
+ @param V pointer to a vector
+ @return Vdup copy of vector
+*/
+#define vec_dup(V) vec_dup_ha(V,0,0)
+
+/** \brief Return copy of vector (no header, alignment specified).
+
+ @param V pointer to a vector
+ @param A alignment (may be zero)
+
+ @return Vdup copy of vector
+*/
+#define vec_dup_aligned(V,A) vec_dup_ha(V,0,A)
+
+/** \brief Copy a vector, memcpy wrapper. Assumes sizeof(SRC[0]) ==
+ sizeof(DST[0])
+
+ @param DST destination
+ @param SRC source
+*/
+#define vec_copy(DST,SRC) clib_memcpy (DST, SRC, vec_len (DST) * \
+ sizeof ((DST)[0]))
+
+/** \brief Clone a vector. Make a new vector with the
+ same size as a given vector but possibly with a different type.
+
+ @param NEW_V pointer to new vector
+ @param OLD_V pointer to old vector
+*/
+#define vec_clone(NEW_V,OLD_V) \
+do { \
+ (NEW_V) = 0; \
+ (NEW_V) = _vec_resize ((NEW_V), vec_len (OLD_V), \
+ vec_len (OLD_V) * sizeof ((NEW_V)[0]), (0), (0)); \
+} while (0)
+
+/** \brief Make sure vector is long enough for given index (general version).
+
+ @param V (possibly NULL) pointer to a vector.
+ @param I vector index which will be valid upon return
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_validate_ha(V,I,H,A) \
+do { \
+ word _v(i) = (I); \
+ word _v(l) = vec_len (V); \
+ if (_v(i) >= _v(l)) \
+ { \
+ vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
+ /* Must zero new space since user may have previously \
+ used e.g. _vec_len (v) -= 10 */ \
+ memset ((V) + _v(l), 0, (1 + (_v(i) - _v(l))) * sizeof ((V)[0])); \
+ } \
+} while (0)
+
+/** \brief Make sure vector is long enough for given index
+ (no header, unspecified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param I vector index which will be valid upon return
+ @return V (value-result macro parameter)
+*/
+#define vec_validate(V,I) vec_validate_ha(V,I,0,0)
+
+/** \brief Make sure vector is long enough for given index
+ (no header, specified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param I vector index which will be valid upon return
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_validate_aligned(V,I,A) vec_validate_ha(V,I,0,A)
+
+/** \brief Make sure vector is long enough for given index
+ and initialize empty space (general version)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param I vector index which will be valid upon return
+ @param INIT initial value (can be a complex expression!)
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_validate_init_empty_ha(V,I,INIT,H,A) \
+do { \
+ word _v(i) = (I); \
+ word _v(l) = vec_len (V); \
+ if (_v(i) >= _v(l)) \
+ { \
+ vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
+ while (_v(l) <= _v(i)) \
+ { \
+ (V)[_v(l)] = (INIT); \
+ _v(l)++; \
+ } \
+ } \
+} while (0)
+
+/** \brief Make sure vector is long enough for given index
+ and initialize empty space (no header, unspecified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param I vector index which will be valid upon return
+ @param INIT initial value (can be a complex expression!)
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_validate_init_empty(V,I,INIT) \
+ vec_validate_init_empty_ha(V,I,INIT,0,0)
+
+/** \brief Make sure vector is long enough for given index
+ and initialize empty space (no header, alignment alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param I vector index which will be valid upon return
+ @param INIT initial value (can be a complex expression!)
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_validate_init_empty_aligned(V,I,A) \
+ vec_validate_init_empty_ha(V,I,INIT,0,A)
+
+/** \brief Add 1 element to end of vector (general version).
+
+ @param V pointer to a vector
+ @param E element to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_add1_ha(V,E,H,A) \
+do { \
+ word _v(l) = vec_len (V); \
+ V = _vec_resize ((V), 1, (_v(l) + 1) * sizeof ((V)[0]), (H), (A)); \
+ (V)[_v(l)] = (E); \
+} while (0)
+
+/** \brief Add 1 element to end of vector (unspecified alignment).
+
+ @param V pointer to a vector
+ @param E element to add
+ @return V (value-result macro parameter)
+*/
+#define vec_add1(V,E) vec_add1_ha(V,E,0,0)
+
+/** \brief Add 1 element to end of vector (alignment specified).
+
+ @param V pointer to a vector
+ @param E element to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_add1_aligned(V,E,A) vec_add1_ha(V,E,0,A)
+
+/** \brief Add N elements to end of vector V,
+ return pointer to new elements in P. (general version)
+
+ @param V pointer to a vector
+ @param P pointer to new vector element(s)
+ @param N number of elements to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V and P (value-result macro parameters)
+*/
+#define vec_add2_ha(V,P,N,H,A) \
+do { \
+ word _v(n) = (N); \
+ word _v(l) = vec_len (V); \
+ V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
+ P = (V) + _v(l); \
+} while (0)
+
+/** \brief Add N elements to end of vector V,
+ return pointer to new elements in P. (no header, unspecified alignment)
+
+ @param V pointer to a vector
+ @param P pointer to new vector element(s)
+ @param N number of elements to add
+ @return V and P (value-result macro parameters)
+*/
+
+#define vec_add2(V,P,N) vec_add2_ha(V,P,N,0,0)
+
+/** \brief Add N elements to end of vector V,
+ return pointer to new elements in P. (no header, alignment specified)
+
+ @param V pointer to a vector
+ @param P pointer to new vector element(s)
+ @param N number of elements to add
+ @param A alignment (may be zero)
+ @return V and P (value-result macro parameters)
+*/
+
+#define vec_add2_aligned(V,P,N,A) vec_add2_ha(V,P,N,0,A)
+
+/** \brief Add N elements to end of vector V (general version)
+
+ @param V pointer to a vector
+ @param E pointer to element(s) to add
+ @param N number of elements to add
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_add_ha(V,E,N,H,A) \
+do { \
+ word _v(n) = (N); \
+ word _v(l) = vec_len (V); \
+ V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
+ clib_memcpy ((V) + _v(l), (E), _v(n) * sizeof ((V)[0])); \
+} while (0)
+
+/** \brief Add N elements to end of vector V (no header, unspecified alignment)
+
+ @param V pointer to a vector
+ @param E pointer to element(s) to add
+ @param N number of elements to add
+ @return V (value-result macro parameter)
+*/
+#define vec_add(V,E,N) vec_add_ha(V,E,N,0,0)
+
+/** \brief Add N elements to end of vector V (no header, specified alignment)
+
+ @param V pointer to a vector
+ @param E pointer to element(s) to add
+ @param N number of elements to add
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_add_aligned(V,E,N,A) vec_add_ha(V,E,N,0,A)
+
+/** \brief Returns last element of a vector and decrements its length
+
+ @param V pointer to a vector
+ @return E element removed from the end of the vector
+*/
+#define vec_pop(V) \
+({ \
+ uword _v(l) = vec_len (V); \
+ ASSERT (_v(l) > 0); \
+ _v(l) -= 1; \
+ _vec_len (V) = _v (l); \
+ (V)[_v(l)]; \
+})
+
+/** \brief Set E to the last element of a vector, decrement vector length
+ @param V pointer to a vector
+ @param E pointer to the last vector element
+ @return E element removed from the end of the vector
+ (value-result macro parameter
+*/
+
+#define vec_pop2(V,E) \
+({ \
+ uword _v(l) = vec_len (V); \
+ if (_v(l) > 0) (E) = vec_pop (V); \
+ _v(l) > 0; \
+})
+
+/** \brief Insert N vector elements starting at element M,
+ initialize new elements (general version).
+
+ @param V (possibly NULL) pointer to a vector.
+ @param N number of elements to insert
+ @param M insertion point
+ @param INIT initial value (can be a complex expression!)
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_insert_init_empty_ha(V,N,M,INIT,H,A) \
+do { \
+ word _v(l) = vec_len (V); \
+ word _v(n) = (N); \
+ word _v(m) = (M); \
+ V = _vec_resize ((V), \
+ _v(n), \
+ (_v(l) + _v(n))*sizeof((V)[0]), \
+ (H), (A)); \
+ ASSERT (_v(m) <= _v(l)); \
+ memmove ((V) + _v(m) + _v(n), \
+ (V) + _v(m), \
+ (_v(l) - _v(m)) * sizeof ((V)[0])); \
+ memset ((V) + _v(m), INIT, _v(n) * sizeof ((V)[0])); \
+} while (0)
+
+/** \brief Insert N vector elements starting at element M,
+ initialize new elements to zero (general version)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param N number of elements to insert
+ @param M insertion point
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_insert_ha(V,N,M,H,A) vec_insert_init_empty_ha(V,N,M,0,H,A)
+
+/** \brief Insert N vector elements starting at element M,
+ initialize new elements to zero (no header, unspecified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param N number of elements to insert
+ @param M insertion point
+ @return V (value-result macro parameter)
+*/
+#define vec_insert(V,N,M) vec_insert_ha(V,N,M,0,0)
+
+/** \brief Insert N vector elements starting at element M,
+ initialize new elements to zero (no header, alignment specified)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param N number of elements to insert
+ @param M insertion point
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_insert_aligned(V,N,M,A) vec_insert_ha(V,N,M,0,A)
+
+/** \brief Insert N vector elements starting at element M,
+ initialize new elements (no header, unspecified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param N number of elements to insert
+ @param M insertion point
+ @param INIT initial value (can be a complex expression!)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_insert_init_empty(V,N,M,INIT) \
+ vec_insert_init_empty_ha(V,N,M,INIT,0,0)
+/* Resize vector by N elements starting from element M, initialize new elements to INIT (alignment specified, no header). */
+
+/** \brief Insert N vector elements starting at element M,
+ initialize new elements (no header, specified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param N number of elements to insert
+ @param M insertion point
+ @param INIT initial value (can be a complex expression!)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_insert_init_empty_aligned(V,N,M,INIT,A) \
+ vec_insert_init_empty_ha(V,N,M,INIT,0,A)
+
+/** \brief Insert N vector elements starting at element M,
+ insert given elements (general version)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param E element(s) to insert
+ @param N number of elements to insert
+ @param M insertion point
+ @param H header size in bytes (may be zero)
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+
+#define vec_insert_elts_ha(V,E,N,M,H,A) \
+do { \
+ word _v(l) = vec_len (V); \
+ word _v(n) = (N); \
+ word _v(m) = (M); \
+ V = _vec_resize ((V), \
+ _v(n), \
+ (_v(l) + _v(n))*sizeof((V)[0]), \
+ (H), (A)); \
+ ASSERT (_v(m) <= _v(l)); \
+ memmove ((V) + _v(m) + _v(n), \
+ (V) + _v(m), \
+ (_v(l) - _v(m)) * sizeof ((V)[0])); \
+ clib_memcpy ((V) + _v(m), (E), \
+ _v(n) * sizeof ((V)[0])); \
+} while (0)
+
+/** \brief Insert N vector elements starting at element M,
+ insert given elements (no header, unspecified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param E element(s) to insert
+ @param N number of elements to insert
+ @param M insertion point
+ @return V (value-result macro parameter)
+*/
+#define vec_insert_elts(V,E,N,M) vec_insert_elts_ha(V,E,N,M,0,0)
+
+/** \brief Insert N vector elements starting at element M,
+ insert given elements (no header, specified alignment)
+
+ @param V (possibly NULL) pointer to a vector.
+ @param E element(s) to insert
+ @param N number of elements to insert
+ @param M insertion point
+ @param A alignment (may be zero)
+ @return V (value-result macro parameter)
+*/
+#define vec_insert_elts_aligned(V,E,N,M,A) vec_insert_elts_ha(V,E,N,M,0,A)
+
+/** \brief Delete N elements starting at element M
+
+ @param V pointer to a vector
+ @param N number of elements to delete
+ @param M first element to delete
+ @return V (value-result macro parameter)
+*/
+#define vec_delete(V,N,M) \
+do { \
+ word _v(l) = vec_len (V); \
+ word _v(n) = (N); \
+ word _v(m) = (M); \
+ /* Copy over deleted elements. */ \
+ if (_v(l) - _v(n) - _v(m) > 0) \
+ memmove ((V) + _v(m), (V) + _v(m) + _v(n), \
+ (_v(l) - _v(n) - _v(m)) * sizeof ((V)[0])); \
+ /* Zero empty space at end (for future re-allocation). */ \
+ if (_v(n) > 0) \
+ memset ((V) + _v(l) - _v(n), 0, _v(n) * sizeof ((V)[0])); \
+ _vec_len (V) -= _v(n); \
+} while (0)
+
+/** \brief Delete the element at index I
+
+ @param V pointer to a vector
+ @param I index to delete
+*/
+#define vec_del1(v,i) \
+do { \
+ uword _vec_del_l = _vec_len (v) - 1; \
+ uword _vec_del_i = (i); \
+ if (_vec_del_i < _vec_del_l) \
+ (v)[_vec_del_i] = (v)[_vec_del_l]; \
+ _vec_len (v) = _vec_del_l; \
+} while (0)
+
+/** \brief Append v2 after v1. Result in v1.
+ @param V1 target vector
+ @param V2 vector to append
+*/
+
+#define vec_append(v1,v2) \
+do { \
+ uword _v(l1) = vec_len (v1); \
+ uword _v(l2) = vec_len (v2); \
+ \
+ v1 = _vec_resize ((v1), _v(l2), \
+ (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, 0); \
+ clib_memcpy ((v1) + _v(l1), (v2), _v(l2) * sizeof ((v2)[0])); \
+} while (0)
+
+/** \brief Append v2 after v1. Result in v1. Specified alignment.
+ @param V1 target vector
+ @param V2 vector to append
+ @param align required alignment
+*/
+
+#define vec_append_aligned(v1,v2,align) \
+do { \
+ uword _v(l1) = vec_len (v1); \
+ uword _v(l2) = vec_len (v2); \
+ \
+ v1 = _vec_resize ((v1), _v(l2), \
+ (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, align); \
+ clib_memcpy ((v1) + _v(l1), (v2), _v(l2) * sizeof ((v2)[0])); \
+} while (0)
+
+/** \brief Prepend v2 before v1. Result in v1.
+ @param V1 target vector
+ @param V2 vector to prepend
+*/
+
+#define vec_prepend(v1,v2) \
+do { \
+ uword _v(l1) = vec_len (v1); \
+ uword _v(l2) = vec_len (v2); \
+ \
+ v1 = _vec_resize ((v1), _v(l2), \
+ (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, 0); \
+ memmove ((v1) + _v(l2), (v1), _v(l1) * sizeof ((v1)[0])); \
+ clib_memcpy ((v1), (v2), _v(l2) * sizeof ((v2)[0])); \
+} while (0)
+
+/** \brief Prepend v2 before v1. Result in v1. Specified alignment
+ @param V1 target vector
+ @param V2 vector to prepend
+ @param align required alignment
+*/
+
+#define vec_prepend_aligned(v1,v2,align) \
+do { \
+ uword _v(l1) = vec_len (v1); \
+ uword _v(l2) = vec_len (v2); \
+ \
+ v1 = _vec_resize ((v1), _v(l2), \
+ (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, align); \
+ memmove ((v1) + _v(l2), (v1), _v(l1) * sizeof ((v1)[0])); \
+ clib_memcpy ((v1), (v2), _v(l2) * sizeof ((v2)[0])); \
+} while (0)
+
+
+/** \brief Zero all vector elements. Null-pointer tolerant.
+ @param var Vector to zero
+*/
+#define vec_zero(var) \
+do { \
+ if (var) \
+ memset ((var), 0, vec_len (var) * sizeof ((var)[0])); \
+} while (0)
+
+/** \brief Set all vector elements to given value. Null-pointer tolerant.
+ @param v vector to set
+ @param val value for each vector element
+*/
+#define vec_set(v,val) \
+do { \
+ word _v(i); \
+ __typeof__ ((v)[0]) _val = (val); \
+ for (_v(i) = 0; _v(i) < vec_len (v); _v(i)++) \
+ (v)[_v(i)] = _val; \
+} while (0)
+
+#ifdef CLIB_UNIX
+#include <stdlib.h> /* for qsort */
+#endif
+
+/** \brief Compare two vectors, not NULL-pointer tolerant
+
+ @param v1 Pointer to a vector
+ @param v2 Pointer to a vector
+ @return 1 if equal, 0 if unequal
+*/
+#define vec_is_equal(v1,v2) \
+ (vec_len (v1) == vec_len (v2) && ! memcmp ((v1), (v2), vec_len (v1) * sizeof ((v1)[0])))
+
+/** \brief Compare two vectors (only applicable to vectors of signed numbers).
+ Used in qsort compare functions.
+
+ @param v1 Pointer to a vector
+ @param v2 Pointer to a vector
+ @return -1, 0, +1
+*/
+#define vec_cmp(v1,v2) \
+({ \
+ word _v(i), _v(cmp), _v(l); \
+ _v(l) = clib_min (vec_len (v1), vec_len (v2)); \
+ _v(cmp) = 0; \
+ for (_v(i) = 0; _v(i) < _v(l); _v(i)++) { \
+ _v(cmp) = (v1)[_v(i)] - (v2)[_v(i)]; \
+ if (_v(cmp)) \
+ break; \
+ } \
+ if (_v(cmp) == 0 && _v(l) > 0) \
+ _v(cmp) = vec_len(v1) - vec_len(v2); \
+ (_v(cmp) < 0 ? -1 : (_v(cmp) > 0 ? +1 : 0)); \
+})
+
+/** \brief Search a vector for the index of the entry that matches.
+
+ @param v1 Pointer to a vector
+ @param v2 Entry to match
+ @return index of match or ~0
+*/
+#define vec_search(v,E) \
+({ \
+ word _v(i) = 0; \
+ while (_v(i) < vec_len(v)) \
+ { \
+ if (v[_v(i)] == E) \
+ break; \
+ _v(i)++; \
+ } \
+ if (_v(i) == vec_len(v)) \
+ _v(i) = ~0; \
+ _v(i); \
+})
+
+/** \brief Sort a vector using the supplied element comparison function
+
+ @param vec vector to sort
+ @param f comparison function
+*/
+#define vec_sort_with_function(vec,f) \
+do { \
+ qsort (vec, vec_len (vec), sizeof (vec[0]), (void *) (f)); \
+} while (0)
+
+/** \brief Make a vector containing a NULL terminated c-string.
+
+ @param V (possibly NULL) pointer to a vector.
+ @param S pointer to string buffer.
+ @param L string length (NOT including the terminating NULL; a la strlen())
+*/
+#define vec_validate_init_c_string(V, S, L) \
+ do { \
+ vec_reset_length (V); \
+ vec_validate ((V), (L)); \
+ if ((S) && (L)) \
+ clib_memcpy ((V), (S), (L)); \
+ (V)[(L)] = 0; \
+ } while (0)
+
+
+/** \brief Test whether a vector is a NULL terminated c-string.
+
+ @param V (possibly NULL) pointer to a vector.
+ @return BOOLEAN indicating if the vector c-string is null terminated.
+*/
+#define vec_c_string_is_terminated(V) \
+ (((V) != 0) && (vec_len (V) != 0) && ((V)[vec_len ((V)) - 1] == 0))
+
+/** \brief (If necessary) NULL terminate a vector containing a c-string.
+
+ @param V (possibly NULL) pointer to a vector.
+ @return V (value-result macro parameter)
+*/
+#define vec_terminate_c_string(V) \
+ do { \
+ u32 vl = vec_len ((V)); \
+ if (!vec_c_string_is_terminated(V)) \
+ { \
+ vec_validate ((V), vl); \
+ (V)[vl] = 0; \
+ } \
+ } while (0)
+
+#endif /* included_vec_h */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */