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/*
* Copyright (C) 2011 Joseph Adams <joeyadams3.14159@gmail.com>
*
* 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 CCAN_DARRAY_H
#define CCAN_DARRAY_H
/* Originally taken from: http://ccodearchive.net/info/darray.html
* But modified for libxkbcommon. */
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
#define darray(type) struct { type *item; unsigned size; unsigned alloc; }
#define darray_new() { 0, 0, 0 }
#define darray_init(arr) do { \
(arr).item = 0; (arr).size = 0; (arr).alloc = 0; \
} while (0)
#define darray_free(arr) do { \
free((arr).item); \
darray_init(arr); \
} while (0)
/*
* Typedefs for darrays of common types. These are useful
* when you want to pass a pointer to an darray(T) around.
*
* The following will produce an incompatible pointer warning:
*
* void foo(darray(int) *arr);
* darray(int) arr = darray_new();
* foo(&arr);
*
* The workaround:
*
* void foo(darray_int *arr);
* darray_int arr = darray_new();
* foo(&arr);
*/
typedef darray (char) darray_char;
typedef darray (signed char) darray_schar;
typedef darray (unsigned char) darray_uchar;
typedef darray (short) darray_short;
typedef darray (int) darray_int;
typedef darray (long) darray_long;
typedef darray (unsigned short) darray_ushort;
typedef darray (unsigned int) darray_uint;
typedef darray (unsigned long) darray_ulong;
/*** Access ***/
#define darray_item(arr, i) ((arr).item[i])
#define darray_size(arr) ((arr).size)
#define darray_empty(arr) ((arr).size == 0)
#define darray_mem(arr, offset) ((arr).item + (offset))
/*** Insertion (single item) ***/
#define darray_append(arr, ...) do { \
darray_resize(arr, (arr).size + 1); \
(arr).item[(arr).size - 1] = (__VA_ARGS__); \
} while (0)
/*** Insertion (multiple items) ***/
#define darray_append_items(arr, items, count) do { \
unsigned __count = (count), __oldSize = (arr).size; \
darray_resize(arr, __oldSize + __count); \
memcpy((arr).item + __oldSize, items, __count * sizeof(*(arr).item)); \
} while (0)
#define darray_from_items(arr, items, count) do { \
unsigned __count = (count); \
darray_resize(arr, __count); \
memcpy((arr).item, items, __count * sizeof(*(arr).item)); \
} while (0)
#define darray_copy(arr_to, arr_from) \
darray_from_items((arr_to), (arr_from).item, (arr_from).size)
/*** String buffer ***/
#define darray_append_string(arr, str) do { \
const char *__str = (str); \
darray_append_items(arr, __str, strlen(__str) + 1); \
(arr).size--; \
} while (0)
#define darray_append_lit(arr, stringLiteral) do { \
darray_append_items(arr, stringLiteral, sizeof(stringLiteral)); \
(arr).size--; \
} while (0)
#define darray_appends_nullterminate(arr, items, count) do { \
unsigned __count = (count), __oldSize = (arr).size; \
darray_resize(arr, __oldSize + __count + 1); \
memcpy((arr).item + __oldSize, items, __count * sizeof(*(arr).item)); \
(arr).item[--(arr).size] = 0; \
} while (0)
#define darray_prepends_nullterminate(arr, items, count) do { \
unsigned __count = (count), __oldSize = (arr).size; \
darray_resize(arr, __count + __oldSize + 1); \
memmove((arr).item + __count, (arr).item, \
__oldSize * sizeof(*(arr).item)); \
memcpy((arr).item, items, __count * sizeof(*(arr).item)); \
(arr).item[--(arr).size] = 0; \
} while (0)
/*** Size management ***/
#define darray_resize(arr, newSize) \
darray_growalloc(arr, (arr).size = (newSize))
#define darray_resize0(arr, newSize) do { \
unsigned __oldSize = (arr).size, __newSize = (newSize); \
(arr).size = __newSize; \
if (__newSize > __oldSize) { \
darray_growalloc(arr, __newSize); \
memset(&(arr).item[__oldSize], 0, \
(__newSize - __oldSize) * sizeof(*(arr).item)); \
} \
} while (0)
#define darray_realloc(arr, newAlloc) do { \
(arr).item = realloc((arr).item, \
((arr).alloc = (newAlloc)) * sizeof(*(arr).item)); \
} while (0)
#define darray_growalloc(arr, need) do { \
unsigned __need = (need); \
if (__need > (arr).alloc) \
darray_realloc(arr, darray_next_alloc((arr).alloc, __need, \
sizeof(*(arr).item))); \
} while (0)
static inline unsigned
darray_next_alloc(unsigned alloc, unsigned need, unsigned itemSize)
{
assert(need < UINT_MAX / itemSize / 2); /* Overflow. */
if (alloc == 0)
alloc = 4;
while (alloc < need)
alloc *= 2;
return alloc;
}
/*** Traversal ***/
#define darray_foreach(i, arr) \
for ((i) = &(arr).item[0]; (i) < &(arr).item[(arr).size]; (i)++)
#define darray_foreach_from(i, arr, from) \
for ((i) = &(arr).item[from]; (i) < &(arr).item[(arr).size]; (i)++)
/* Iterate on index and value at the same time, like Python's enumerate. */
#define darray_enumerate(idx, val, arr) \
for ((idx) = 0, (val) = &(arr).item[0]; \
(idx) < (arr).size; \
(idx)++, (val)++)
#define darray_enumerate_from(idx, val, arr, from) \
for ((idx) = (from), (val) = &(arr).item[0]; \
(idx) < (arr).size; \
(idx)++, (val)++)
#define darray_foreach_reverse(i, arr) \
for ((i) = &(arr).item[(arr).size]; (i)-- > &(arr).item[0]; )
#endif /* CCAN_DARRAY_H */
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