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;
42 * Typedefs for darrays of common types:
44 * darray_char, darray_schar, darray_uchar
45 * darray_short, darray_int, darray_long
46 * darray_ushort, darray_uint, darray_ulong
50 * T darray_item(darray(T) arr, size_t index);
51 * size_t darray_size(darray(T) arr);
52 * size_t darray_alloc(darray(T) arr);
53 * bool darray_empty(darray(T) arr);
55 * Insertion (single item):
57 * void darray_append(darray(T) arr, T item);
58 * void darray_prepend(darray(T) arr, T item);
59 * void darray_push(darray(T) arr, T item); // same as darray_append
61 * Insertion (multiple items):
63 * void darray_append_items(darray(T) arr, T *items, size_t count);
64 * void darray_prepend_items(darray(T) arr, T *items, size_t count);
66 * void darray_appends(darray(T) arr, [T item, [...]]);
67 * void darray_prepends(darray(T) arr, [T item, [...]]);
69 * // Same functionality as above, but does not require typeof.
70 * void darray_appends_t(darray(T) arr, #T, [T item, [...]]);
71 * void darray_prepends_t(darray(T) arr, #T, [T item, [...]]);
75 * T darray_pop(darray(T) arr | darray_size(arr) != 0);
76 * T* darray_pop_check(darray(T*) arr);
80 * void darray_from_items(darray(T) arr, T *items, size_t count);
81 * void darray_from_c(darray(T) arr, T c_array[N]);
85 * void darray_append_string(darray(char) arr, const char *str);
86 * void darray_append_lit(darray(char) arr, char stringLiteral[N+1]);
88 * void darray_prepend_string(darray(char) arr, const char *str);
89 * void darray_prepend_lit(darray(char) arr, char stringLiteral[N+1]);
91 * void darray_from_string(darray(T) arr, const char *str);
92 * void darray_from_lit(darray(char) arr, char stringLiteral[N+1]);
96 * void darray_resize(darray(T) arr, size_t newSize);
97 * void darray_resize0(darray(T) arr, size_t newSize);
99 * void darray_realloc(darray(T) arr, size_t newAlloc);
100 * void darray_growalloc(darray(T) arr, size_t newAlloc);
102 * void darray_make_room(darray(T) arr, size_t room);
106 * darray_foreach(T *&i, darray(T) arr) {...}
107 * darray_foreach_reverse(T *&i, darray(T) arr) {...}
109 * Except for darray_foreach and darray_foreach_reverse,
110 * all macros evaluate their non-darray arguments only once.
115 #define darray(type) struct {type *item; size_t size; size_t alloc;}
117 #define darray_new() {0,0,0}
118 #define darray_init(arr) do {(arr).item=0; (arr).size=0; (arr).alloc=0;} while(0)
119 #define darray_free(arr) do {free((arr).item);} while(0)
123 * Typedefs for darrays of common types. These are useful
124 * when you want to pass a pointer to an darray(T) around.
126 * The following will produce an incompatible pointer warning:
128 * void foo(darray(int) *arr);
129 * darray(int) arr = darray_new();
134 * void foo(darray_int *arr);
135 * darray_int arr = darray_new();
139 typedef darray(char) darray_char;
140 typedef darray(signed char) darray_schar;
141 typedef darray(unsigned char) darray_uchar;
143 typedef darray(short) darray_short;
144 typedef darray(int) darray_int;
145 typedef darray(long) darray_long;
147 typedef darray(unsigned short) darray_ushort;
148 typedef darray(unsigned int) darray_uint;
149 typedef darray(unsigned long) darray_ulong;
154 #define darray_item(arr, i) ((arr).item[i])
155 #define darray_size(arr) ((arr).size)
156 #define darray_alloc(arr) ((arr).alloc)
157 #define darray_empty(arr) ((arr).size == 0)
160 /*** Insertion (single item) ***/
162 #define darray_append(arr, ...) do { \
163 darray_resize(arr, (arr).size+1); \
164 (arr).item[(arr).size-1] = (__VA_ARGS__); \
166 #define darray_prepend(arr, ...) do { \
167 darray_resize(arr, (arr).size+1); \
168 memmove((arr).item+1, (arr).item, ((arr).size-1)*sizeof(*(arr).item)); \
169 (arr).item[0] = (__VA_ARGS__); \
171 #define darray_push(arr, ...) darray_append(arr, __VA_ARGS__)
174 /*** Insertion (multiple items) ***/
176 #define darray_append_items(arr, items, count) do { \
177 size_t __count = (count), __oldSize = (arr).size; \
178 darray_resize(arr, __oldSize + __count); \
179 memcpy((arr).item + __oldSize, items, __count * sizeof(*(arr).item)); \
182 #define darray_prepend_items(arr, items, count) do { \
183 size_t __count = (count), __oldSize = (arr).size; \
184 darray_resize(arr, __count + __oldSize); \
185 memmove((arr).item + __count, (arr).item, __oldSize * sizeof(*(arr).item)); \
186 memcpy((arr).item, items, __count * sizeof(*(arr).item)); \
189 #define darray_append_items_nullterminate(arr, items, count) do { \
190 size_t __count = (count), __oldSize = (arr).size; \
191 darray_resize(arr, __oldSize + __count + 1); \
192 memcpy((arr).item + __oldSize, items, __count * sizeof(*(arr).item)); \
193 (arr).item[--(arr).size] = 0; \
196 #define darray_prepend_items_nullterminate(arr, items, count) do { \
197 size_t __count = (count), __oldSize = (arr).size; \
198 darray_resize(arr, __count + __oldSize + 1); \
199 memmove((arr).item + __count, (arr).item, __oldSize * sizeof(*(arr).item)); \
200 memcpy((arr).item, items, __count * sizeof(*(arr).item)); \
201 (arr).item[--(arr).size] = 0; \
205 #define darray_appends(arr, ...) darray_appends_t(arr, typeof((*(arr).item)), __VA_ARGS__)
206 #define darray_prepends(arr, ...) darray_prepends_t(arr, typeof((*(arr).item)), __VA_ARGS__)
209 #define darray_appends_t(arr, type, ...) do { \
210 type __src[] = {__VA_ARGS__}; \
211 darray_append_items(arr, __src, sizeof(__src)/sizeof(*__src)); \
213 #define darray_prepends_t(arr, type, ...) do { \
214 type __src[] = {__VA_ARGS__}; \
215 darray_prepend_items(arr, __src, sizeof(__src)/sizeof(*__src)); \
221 /* Warning: Do not call darray_pop on an empty darray. */
222 #define darray_pop(arr) ((arr).item[--(arr).size])
223 #define darray_pop_check(arr) ((arr).size ? darray_pop(arr) : NULL)
226 /*** Replacement ***/
228 #define darray_from_items(arr, items, count) do {size_t __count = (count); darray_resize(arr, __count); memcpy((arr).item, items, __count*sizeof(*(arr).item));} while(0)
229 #define darray_from_c(arr, c_array) darray_from_items(arr, c_array, sizeof(c_array)/sizeof(*(c_array)))
232 /*** String buffer ***/
234 #define darray_append_string(arr, str) do {const char *__str = (str); darray_append_items(arr, __str, strlen(__str)+1); (arr).size--;} while(0)
235 #define darray_append_lit(arr, stringLiteral) do {darray_append_items(arr, stringLiteral, sizeof(stringLiteral)); (arr).size--;} while(0)
237 #define darray_prepend_string(arr, str) do { \
238 const char *__str = (str); \
239 darray_prepend_items_nullterminate(arr, __str, strlen(__str)); \
241 #define darray_prepend_lit(arr, stringLiteral) \
242 darray_prepend_items_nullterminate(arr, stringLiteral, sizeof(stringLiteral) - 1)
244 #define darray_from_string(arr, str) do {const char *__str = (str); darray_from_items(arr, __str, strlen(__str)+1); (arr).size--;} while(0)
245 #define darray_from_lit(arr, stringLiteral) do {darray_from_items(arr, stringLiteral, sizeof(stringLiteral)); (arr).size--;} while(0)
248 /*** Size management ***/
250 #define darray_resize(arr, newSize) darray_growalloc(arr, (arr).size = (newSize))
251 #define darray_resize0(arr, newSize) do { \
252 size_t __oldSize = (arr).size, __newSize = (newSize); \
253 (arr).size = __newSize; \
254 if (__newSize > __oldSize) { \
255 darray_growalloc(arr, __newSize); \
256 memset(&(arr).item[__oldSize], 0, (__newSize - __oldSize) * sizeof(*(arr).item)); \
260 #define darray_realloc(arr, newAlloc) do { \
261 (arr).item = realloc((arr).item, ((arr).alloc = (newAlloc)) * sizeof(*(arr).item)); \
263 #define darray_growalloc(arr, need) do { \
264 size_t __need = (need); \
265 if (__need > (arr).alloc) \
266 darray_realloc(arr, darray_next_alloc((arr).alloc, __need)); \
269 #if HAVE_STATEMENT_EXPR==1
270 #define darray_make_room(arr, room) ({size_t newAlloc = (arr).size+(room); if ((arr).alloc<newAlloc) darray_realloc(arr, newAlloc); (arr).item+(arr).size; })
273 static inline size_t darray_next_alloc(size_t alloc, size_t need)
286 * darray_foreach(T *&i, darray(T) arr) {...}
288 * Traverse a darray. `i` must be declared in advance as a pointer to an item.
290 #define darray_foreach(i, arr) \
291 for ((i) = &(arr).item[0]; (i) < &(arr).item[(arr).size]; (i)++)
294 * darray_foreach_reverse(T *&i, darray(T) arr) {...}
296 * Like darray_foreach, but traverse in reverse order.
298 #define darray_foreach_reverse(i, arr) \
299 for ((i) = &(arr).item[(arr).size]; (i)-- > &(arr).item[0]; )
302 #endif /* CCAN_DARRAY_H */
306 darray_growalloc(arr, newAlloc) sees if the darray can currently hold newAlloc items;
307 if not, it increases the alloc to satisfy this requirement, allocating slack
308 space to avoid having to reallocate for every size increment.
310 darray_from_string(arr, str) copies a string to an darray_char.
312 darray_push(arr, item) pushes an item to the end of the darray.
313 darray_pop(arr) pops it back out. Be sure there is at least one item in the darray before calling.
314 darray_pop_check(arr) does the same as darray_pop, but returns NULL if there are no more items left in the darray.
316 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.
317 Currently requires HAVE_STATEMENT_EXPR, but I plan to remove this dependency by creating an inline function.
319 The following require HAVE_TYPEOF==1 :
321 darray_appends(arr, item0, item1...) appends a collection of comma-delimited items to the darray.
322 darray_prepends(arr, item0, item1...) prepends a collection of comma-delimited items to the darray.\
330 darray_appends(arr, 0,1,2,3,4);
331 darray_appends(arr, -5,-4,-3,-2,-1);
332 darray_foreach(i, arr)
339 typedef struct {int n,d;} Fraction;
340 darray(Fraction) fractions;
343 darray_appends(fractions, {3,4}, {3,5}, {2,1});
344 darray_foreach(i, fractions)
345 printf("%d/%d\n", i->n, i->d);
347 darray_free(fractions);