1 /* dynar - a generic dynamic array */
3 /* Copyright (c) 2004-2019. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <string.h> /* memcpy */
13 #include <xbt/base.h> /* SG_BEGIN_DECL */
14 #include <xbt/function_types.h>
18 /** @addtogroup XBT_dynar
19 * @brief DynArr are dynamically sized vector which may contain any type of variables.
21 * These are the SimGrid version of the dynamically size arrays, which all C programmer recode one day or another.
23 * For performance concerns, the content of DynArr must be homogeneous (in contrary to dictionnaries -- see the
24 * @ref XBT_dict section). You thus have to provide the function which will be used to free the content at
25 * structure creation (of type void_f_pvoid_t).
27 * @deprecated If you are using C++, you might want to use `std::vector` instead.
29 * @section XBT_dynar_exscal Example with scalar
30 * @dontinclude dynar.cpp
37 * @until end_of_traversal
40 * @until xbt_dynar_free
42 * @section XBT_dynar_exptr Example with pointed data
44 * @skip test_dynar_string
52 * @skip end_of_doxygen
55 * Note that if you use dynars to store pointed data, the xbt_dynar_search(), xbt_dynar_search_or_negative() and
56 * xbt_dynar_member() won't be for you. Instead of comparing your pointed elements, they compare the pointer to them.
57 * See the documentation of xbt_dynar_search() for more info.
59 /** @defgroup XBT_dynar_cons Dynar constructor and destructor
64 /** @brief Dynar data type (opaque type) */
65 typedef struct xbt_dynar_s *xbt_dynar_t;
67 XBT_PUBLIC xbt_dynar_t xbt_dynar_new(const unsigned long elm_size, void_f_pvoid_t const free_f);
68 XBT_PUBLIC void xbt_dynar_init(xbt_dynar_t dynar, const unsigned long elmsize, void_f_pvoid_t const free_f);
69 XBT_PUBLIC void xbt_dynar_free(xbt_dynar_t* dynar);
70 XBT_PUBLIC void xbt_dynar_free_voidp(void* dynar);
71 XBT_PUBLIC void xbt_dynar_free_container(xbt_dynar_t* dynar);
72 XBT_PUBLIC void xbt_dynar_free_data(xbt_dynar_t dynar);
73 XBT_PUBLIC void xbt_dynar_shrink(xbt_dynar_t dynar, int empty_slots);
74 XBT_PUBLIC void xbt_dynar_dump(xbt_dynar_t dynar);
77 /** @defgroup XBT_dynar_array Dynar as a regular array
83 XBT_PUBLIC void xbt_dynar_get_cpy(const xbt_dynar_t dynar, const unsigned long idx, void* const dst);
84 XBT_PUBLIC void xbt_dynar_set(xbt_dynar_t dynar, const int idx, const void* src);
85 XBT_PUBLIC void xbt_dynar_replace(xbt_dynar_t dynar, const unsigned long idx, const void* object);
87 XBT_PUBLIC void xbt_dynar_insert_at(xbt_dynar_t const dynar, const int idx, const void* src);
88 XBT_PUBLIC void xbt_dynar_remove_at(xbt_dynar_t const dynar, const int idx, void* const dst);
89 XBT_PUBLIC void xbt_dynar_remove_n_at(xbt_dynar_t const dynar, const unsigned int n, const int idx);
91 XBT_PUBLIC unsigned int xbt_dynar_search(xbt_dynar_t const dynar, void* elem);
92 XBT_PUBLIC signed int xbt_dynar_search_or_negative(xbt_dynar_t const dynar, void* const elem);
93 XBT_PUBLIC int xbt_dynar_member(xbt_dynar_t const dynar, void* elem);
94 XBT_PUBLIC void xbt_dynar_sort(xbt_dynar_t const dynar, int_f_cpvoid_cpvoid_t compar_fn);
95 XBT_PUBLIC xbt_dynar_t xbt_dynar_sort_strings(xbt_dynar_t dynar);
96 XBT_PUBLIC int xbt_dynar_compare(xbt_dynar_t d1, xbt_dynar_t d2, int (*compar)(const void*, const void*));
97 XBT_PUBLIC void* xbt_dynar_to_array(xbt_dynar_t dynar);
100 /** @defgroup XBT_dynar_misc Dynar miscellaneous functions
106 XBT_PUBLIC unsigned long xbt_dynar_length(const xbt_dynar_t dynar);
107 XBT_PUBLIC int xbt_dynar_is_empty(const xbt_dynar_t dynar);
108 XBT_PUBLIC void xbt_dynar_reset(xbt_dynar_t const dynar);
109 XBT_PUBLIC void xbt_dynar_merge(xbt_dynar_t* d1, xbt_dynar_t* d2);
112 /** @defgroup XBT_dynar_perl Perl-like use of dynars
118 XBT_PUBLIC void xbt_dynar_push(xbt_dynar_t const dynar, const void* src);
119 XBT_PUBLIC void xbt_dynar_pop(xbt_dynar_t const dynar, void* const dst);
120 XBT_PUBLIC void xbt_dynar_unshift(xbt_dynar_t const dynar, const void* src);
121 XBT_PUBLIC void xbt_dynar_shift(xbt_dynar_t const dynar, void* const dst);
122 XBT_PUBLIC void xbt_dynar_map(const xbt_dynar_t dynar, void_f_pvoid_t const op);
125 /** @defgroup XBT_dynar_ctn Direct manipulation to the dynars content
128 * Those functions do not retrieve the content, but only their address.
133 XBT_PUBLIC void* xbt_dynar_set_at_ptr(const xbt_dynar_t dynar, const unsigned long idx);
134 XBT_PUBLIC void* xbt_dynar_get_ptr(const xbt_dynar_t dynar, const unsigned long idx);
135 XBT_PUBLIC void* xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar, const int idx);
136 XBT_PUBLIC void* xbt_dynar_push_ptr(xbt_dynar_t const dynar);
137 XBT_PUBLIC void* xbt_dynar_pop_ptr(xbt_dynar_t const dynar);
140 /** @defgroup XBT_dynar_speed Speed optimized access to dynars of scalars
143 * While the other functions use a memcpy to retrieve the content into the user provided area, those ones use a
144 * regular affectation. It only works for scalar values, but should be a little faster.
149 /** @brief Quick retrieval of scalar content
150 * @hideinitializer */
151 # define xbt_dynar_get_as(dynar,idx,type) \
152 (*(type*)xbt_dynar_get_ptr((dynar),(idx)))
153 /** @brief Quick setting of scalar content
154 * @hideinitializer */
155 # define xbt_dynar_set_as(dynar,idx,type,val) \
156 (*(type*)xbt_dynar_set_at_ptr((dynar),(idx))) = val
157 /** @brief Quick retrieval of scalar content
158 * @hideinitializer */
159 # define xbt_dynar_getlast_as(dynar,type) \
160 (*(type*)xbt_dynar_get_ptr((dynar),xbt_dynar_length(dynar)-1))
161 /** @brief Quick retrieval of scalar content
162 * @hideinitializer */
163 # define xbt_dynar_getfirst_as(dynar,type) \
164 (*(type*)xbt_dynar_get_ptr((dynar),0))
165 /** @brief Quick insertion of scalar content
166 * @hideinitializer */
167 # define xbt_dynar_insert_at_as(dynar,idx,type,value) \
168 *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value
169 /** @brief Quick insertion of scalar content
170 * @hideinitializer */
171 # define xbt_dynar_push_as(dynar,type,value) \
172 *(type*)xbt_dynar_push_ptr(dynar)=value
173 /** @brief Quick removal of scalar content
174 * @hideinitializer */
175 # define xbt_dynar_pop_as(dynar,type) \
176 (*(type*)xbt_dynar_pop_ptr(dynar))
179 /** @defgroup XBT_dynar_cursor Cursors on dynar
182 * Cursors are used to iterate over the structure. Never add elements to the DynArr during the traversal. To remove
183 * elements, use the xbt_dynar_cursor_rm() function.
185 * Do not call these function directly, but only within the xbt_dynar_foreach macro.
190 XBT_PUBLIC void xbt_dynar_cursor_rm(xbt_dynar_t dynar, unsigned int* const cursor);
193 * @warning DO NOT USE THIS STRUCTURE DIRECTLY! Instead, use the public interface:
194 * This was made public to allow:
195 * - the inlining of the foreach elements
196 * - sending such beasts over the network
198 * @see xbt_dynar_length()
200 typedef struct xbt_dynar_s {
203 unsigned long elmsize;
205 void_f_pvoid_t free_f;
208 static inline int _xbt_dynar_cursor_get(const xbt_dynar_t dynar, unsigned int idx, void* const dst)
210 if (!dynar) /* iterating over a NULL dynar is a no-op */
213 if (idx >= dynar->used)
216 memcpy(dst, ((char *) dynar->data) + idx * dynar->elmsize, dynar->elmsize);
221 /** @brief Iterates over the whole dynar.
223 * @param _dynar what to iterate over
224 * @param _cursor an integer used as cursor
228 * Here is an example of usage:
233 xbt_dynar_foreach (dyn,cpt,str) {
234 printf("Seen %s\n",str);
238 * Note that underneath, that's a simple for loop with no real black magic involved. It's perfectly safe to interrupt
239 * a foreach with a break or a return statement.
241 #define xbt_dynar_foreach(_dynar,_cursor,_data) \
242 for ( (_cursor) = 0 ; \
243 _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \
247 #define xbt_dynar_foreach_ptr(_dynar,_cursor,_ptr) \
248 for ((_cursor) = 0 ; \
249 (_ptr = _cursor < _dynar->used ? xbt_dynar_get_ptr(_dynar,_cursor) : NULL) ; \
252 #define xbt_dynar_foreach_ptr(_dynar,_cursor,_ptr) \
253 for ((_cursor) = 0 ; \
254 (_ptr = _cursor < _dynar->used ? (decltype(_ptr)) xbt_dynar_get_ptr(_dynar,_cursor) : NULL) ; \
263 /** Dynar of `T*` which `delete` its values */
264 template <class T> inline xbt_dynar_t newDeleteDynar()
266 return xbt_dynar_new(sizeof(T*), [](void* p) { delete *(T**)p; });
272 #endif /* XBT_DYNAR_H */