2 * Copyright (C) 2011 Joseph Adams <joeyadams3.14159@gmail.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
33 * Life cycle of a darray (dynamically-allocated array):
35 * darray(int) a = darray_new();
38 * struct {darray(int) a;} foo;
45 * .a = darray_lit({1, 2, 3})
48 * Typedefs for darrays of common types:
50 * darray_char, darray_schar, darray_uchar
51 * darray_short, darray_int, darray_long
52 * darray_ushort, darray_uint, darray_ulong
56 * T darray_item(darray(T) arr, size_t index);
57 * size_t darray_size(darray(T) arr);
58 * size_t darray_alloc(darray(T) arr);
59 * bool darray_empty(darray(T) arr);
61 * // Access raw memory, starting from the item in offset.
62 * // Not safe, be careful, etc.
63 * T* darray_mem(darray(T) arr, size_t offset);
65 * Insertion (single item):
67 * void darray_append(darray(T) arr, T item);
68 * void darray_prepend(darray(T) arr, T item);
69 * void darray_push(darray(T) arr, T item); // same as darray_append
71 * Insertion (multiple items):
73 * void darray_append_items(darray(T) arr, T *items, size_t count);
74 * void darray_prepend_items(darray(T) arr, T *items, size_t count);
76 * void darray_appends(darray(T) arr, [T item, [...]]);
77 * void darray_prepends(darray(T) arr, [T item, [...]]);
79 * // Same functionality as above, but does not require typeof.
80 * void darray_appends_t(darray(T) arr, #T, [T item, [...]]);
81 * void darray_prepends_t(darray(T) arr, #T, [T item, [...]]);
85 * T darray_pop(darray(T) arr | darray_size(arr) != 0);
86 * T* darray_pop_check(darray(T*) arr);
90 * void darray_from_items(darray(T) arr, T *items, size_t count);
91 * void darray_from_c(darray(T) arr, T c_array[N]);
95 * void darray_append_string(darray(char) arr, const char *str);
96 * void darray_append_lit(darray(char) arr, char stringLiteral[N+1]);
98 * void darray_prepend_string(darray(char) arr, const char *str);
99 * void darray_prepend_lit(darray(char) arr, char stringLiteral[N+1]);
101 * void darray_from_string(darray(T) arr, const char *str);
102 * void darray_from_lit(darray(char) arr, char stringLiteral[N+1]);
106 * void darray_resize(darray(T) arr, size_t newSize);
107 * void darray_resize0(darray(T) arr, size_t newSize);
109 * void darray_realloc(darray(T) arr, size_t newAlloc);
110 * void darray_growalloc(darray(T) arr, size_t newAlloc);
112 * void darray_make_room(darray(T) arr, size_t room);
116 * darray_foreach(T *&i, darray(T) arr) {...}
117 * darray_foreach_reverse(T *&i, darray(T) arr) {...}
119 * Except for darray_foreach and darray_foreach_reverse,
120 * all macros evaluate their non-darray arguments only once.
125 #define darray(type) struct { type *item; size_t size; size_t alloc; }
127 #define darray_new() { 0, 0, 0 }
128 #define darray_init(arr) do { (arr).item = 0; (arr).size = 0; (arr).alloc = 0; \
130 #define darray_free(arr) do { free((arr).item); darray_init(arr); } while (0)
132 /* Only use for immutable darray - e.g. for static const initialzers. */
133 #define darray_lit(c_array) { (c_array), sizeof(c_array) / sizeof(*(c_array)), \
137 * Typedefs for darrays of common types. These are useful
138 * when you want to pass a pointer to an darray(T) around.
140 * The following will produce an incompatible pointer warning:
142 * void foo(darray(int) *arr);
143 * darray(int) arr = darray_new();
148 * void foo(darray_int *arr);
149 * darray_int arr = darray_new();
153 typedef darray (char) darray_char;
154 typedef darray (signed char) darray_schar;
155 typedef darray (unsigned char) darray_uchar;
157 typedef darray (short) darray_short;
158 typedef darray (int) darray_int;
159 typedef darray (long) darray_long;
161 typedef darray (unsigned short) darray_ushort;
162 typedef darray (unsigned int) darray_uint;
163 typedef darray (unsigned long) darray_ulong;
167 #define darray_item(arr, i) ((arr).item[i])
168 #define darray_size(arr) ((arr).size)
169 #define darray_alloc(arr) ((arr).alloc)
170 #define darray_empty(arr) ((arr).size == 0)
172 #define darray_mem(arr, offset) ((arr).item + (offset))
173 #define darray_same(arr1, arr2) ((arr1).item == (arr2).item)
175 /*** Insertion (single item) ***/
177 #define darray_append(arr, ...) do { \
178 darray_resize(arr, (arr).size + 1); \
179 (arr).item[(arr).size - 1] = (__VA_ARGS__); \
181 #define darray_prepend(arr, ...) do { \
182 darray_resize(arr, (arr).size + 1); \
183 memmove((arr).item + 1, (arr).item, \
184 ((arr).size - 1) * sizeof(*(arr).item)); \
185 (arr).item[0] = (__VA_ARGS__); \
187 #define darray_push(arr, ...) darray_append(arr, __VA_ARGS__)
189 /*** Insertion (multiple items) ***/
191 #define darray_append_items(arr, items, count) do { \
192 size_t __count = (count), __oldSize = (arr).size; \
193 darray_resize(arr, __oldSize + __count); \
194 memcpy((arr).item + __oldSize, items, __count * sizeof(*(arr).item)); \
197 #define darray_prepend_items(arr, items, count) do { \
198 size_t __count = (count), __oldSize = (arr).size; \
199 darray_resize(arr, __count + __oldSize); \
200 memmove((arr).item + __count, (arr).item, __oldSize * \
201 sizeof(*(arr).item)); \
202 memcpy((arr).item, items, __count * sizeof(*(arr).item)); \
205 #define darray_append_items_nullterminate(arr, items, count) do { \
206 size_t __count = (count), __oldSize = (arr).size; \
207 darray_resize(arr, __oldSize + __count + 1); \
208 memcpy((arr).item + __oldSize, items, __count * sizeof(*(arr).item)); \
209 (arr).item[--(arr).size] = 0; \
212 #define darray_prepend_items_nullterminate(arr, items, count) do { \
213 size_t __count = (count), __oldSize = (arr).size; \
214 darray_resize(arr, __count + __oldSize + 1); \
215 memmove((arr).item + __count, (arr).item, __oldSize * \
216 sizeof(*(arr).item)); \
217 memcpy((arr).item, items, __count * sizeof(*(arr).item)); \
218 (arr).item[--(arr).size] = 0; \
222 #define darray_appends(arr, ...) darray_appends_t(arr, typeof((*(arr).item)), \
224 #define darray_prepends(arr, ...) darray_prepends_t(arr, typeof((*(arr).item)), \
228 #define darray_appends_t(arr, type, ...) do { \
229 type __src[] = { __VA_ARGS__ }; \
230 darray_append_items(arr, __src, sizeof(__src) / sizeof(*__src)); \
232 #define darray_prepends_t(arr, type, ...) do { \
233 type __src[] = { __VA_ARGS__ }; \
234 darray_prepend_items(arr, __src, sizeof(__src) / sizeof(*__src)); \
239 /* Warning: Do not call darray_pop on an empty darray. */
240 #define darray_pop(arr) ((arr).item[--(arr).size])
241 #define darray_pop_check(arr) ((arr).size ? darray_pop(arr) : NULL)
243 /*** Replacement ***/
245 #define darray_from_items(arr, items, count) do { size_t __count = (count); \
246 darray_resize(arr, __count); \
247 memcpy((arr).item, items, \
249 * sizeof(*(arr).item)); \
251 #define darray_from_c(arr, c_array) darray_from_items( \
252 arr, c_array, sizeof(c_array) / sizeof(*(c_array)))
253 #define darray_copy(arr_to, arr_from) darray_from_items( \
256 item, (arr_from).size)
258 /*** String buffer ***/
260 #define darray_append_string(arr, str) do { const char *__str = (str); \
261 darray_append_items( \
263 strlen(__str) + 1); \
266 #define darray_append_lit(arr, stringLiteral) do { darray_append_items( \
267 arr, stringLiteral, \
268 sizeof(stringLiteral)); \
269 (arr).size--; } while (0)
271 #define darray_prepend_string(arr, str) do { \
272 const char *__str = (str); \
273 darray_prepend_items_nullterminate(arr, __str, strlen(__str)); \
275 #define darray_prepend_lit(arr, stringLiteral) \
276 darray_prepend_items_nullterminate(arr, stringLiteral, \
277 sizeof(stringLiteral) - 1)
279 #define darray_from_string(arr, str) do { const char *__str = (str); \
281 arr, __str, strlen( \
285 #define darray_from_lit(arr, stringLiteral) do { darray_from_items( \
286 arr, stringLiteral, \
287 sizeof(stringLiteral)); \
288 (arr).size--; } while (0)
290 /*** Size management ***/
292 #define darray_resize(arr, newSize) darray_growalloc(arr, (arr).size = \
294 #define darray_resize0(arr, newSize) do { \
295 size_t __oldSize = (arr).size, __newSize = (newSize); \
296 (arr).size = __newSize; \
297 if (__newSize > __oldSize) { \
298 darray_growalloc(arr, __newSize); \
299 memset(&(arr).item[__oldSize], 0, \
300 (__newSize - __oldSize) * sizeof(*(arr).item)); \
304 #define darray_realloc(arr, newAlloc) do { \
306 realloc((arr).item, ((arr).alloc = (newAlloc)) * \
307 sizeof(*(arr).item)); \
309 #define darray_growalloc(arr, need) do { \
310 size_t __need = (need); \
311 if (__need > (arr).alloc) \
312 darray_realloc(arr, darray_next_alloc((arr).alloc, __need)); \
315 #if HAVE_STATEMENT_EXPR == 1
316 #define darray_make_room(arr, \
317 room) ({ size_t newAlloc = (arr).size + (room); \
319 newAlloc) darray_realloc(arr, newAlloc); \
320 (arr).item + (arr).size; })
324 darray_next_alloc(size_t alloc, size_t need)
336 * darray_foreach(T *&i, darray(T) arr) {...}
338 * Traverse a darray. `i` must be declared in advance as a pointer to an item.
340 #define darray_foreach(i, arr) \
341 for ((i) = &(arr).item[0]; (i) < &(arr).item[(arr).size]; (i)++)
343 #define darray_foreach_from(i, arr, from) \
344 for ((i) = &(arr).item[from]; (i) < &(arr).item[(arr).size]; (i)++)
347 * darray_foreach_reverse(T *&i, darray(T) arr) {...}
349 * Like darray_foreach, but traverse in reverse order.
351 #define darray_foreach_reverse(i, arr) \
352 for ((i) = &(arr).item[(arr).size]; (i)-- > &(arr).item[0]; )
354 #endif /* CCAN_DARRAY_H */
358 * darray_growalloc(arr, newAlloc) sees if the darray can currently hold newAlloc items;
359 * if not, it increases the alloc to satisfy this requirement, allocating slack
360 * space to avoid having to reallocate for every size increment.
362 * darray_from_string(arr, str) copies a string to an darray_char.
364 * darray_push(arr, item) pushes an item to the end of the darray.
365 * darray_pop(arr) pops it back out. Be sure there is at least one item in the darray before calling.
366 * darray_pop_check(arr) does the same as darray_pop, but returns NULL if there are no more items left in the darray.
368 * darray_make_room(arr, room) ensures there's 'room' elements of space after the end of the darray, and it returns a pointer to this space.
369 * Currently requires HAVE_STATEMENT_EXPR, but I plan to remove this dependency by creating an inline function.
371 * The following require HAVE_TYPEOF==1 :
373 * darray_appends(arr, item0, item1...) appends a collection of comma-delimited items to the darray.
374 * darray_prepends(arr, item0, item1...) prepends a collection of comma-delimited items to the darray.\
382 * darray_appends(arr, 0,1,2,3,4);
383 * darray_appends(arr, -5,-4,-3,-2,-1);
384 * darray_foreach(i, arr)
391 * typedef struct {int n,d;} Fraction;
392 * darray(Fraction) fractions;
395 * darray_appends(fractions, {3,4}, {3,5}, {2,1});
396 * darray_foreach(i, fractions)
397 * printf("%d/%d\n", i->n, i->d);
399 * darray_free(fractions);