darray.h

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Author : Ran Benita
Date : 2025-02-05 14:41:21
Hash : df2322d7
Message : Replace include guards by `#pragma once` We currently have a mix of include headers, pragma once and some missing. pragma once is not standard but is widely supported, and we already use it with no issues, so I'd say it's not a problem. Let's convert all headers to pragma once to avoid the annoying include guards. The public headers are *not* converted. Signed-off-by: Ran Benita <ran@unusedvar.com>
src/darray.h
/*
 * Copyright (C) 2011 Joseph Adams <joeyadams3.14159@gmail.com>
 * SPDX-License-Identifier: MIT
 */
#pragma once

/* Originally taken from: https://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)

#define darray_steal(arr, to, to_size) do { \
    *(to) = (arr).item; \
    if (to_size) \
        *(unsigned int *) (to_size) = (arr).size; \
    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_items(arr)       ((arr).item)
#define darray_size(arr)        ((arr).size)
#define darray_empty(arr)       ((arr).size == 0)

/*** 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); \
    if (__count != 0) \
        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)

#define darray_concat(arr_to, arr_from) do { \
    if ((arr_from).size > 0) \
        darray_append_items((arr_to), (arr_from).item, (arr_from).size); \
} while (0)

/*** Removal ***/

/* Warning: Do not call darray_remove_last on an empty darray. */
#define darray_remove_last(arr) (--(arr).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)

#define darray_shrink(arr) do { \
    if ((arr).size > 0) \
        (arr).item = realloc((arr).item, \
                             ((arr).alloc = (arr).size) * sizeof(*(arr).item)); \
} while (0)

#define darray_max_alloc(itemSize) (UINT_MAX / (itemSize))

static inline unsigned
darray_next_alloc(unsigned alloc, unsigned need, unsigned itemSize)
{
    assert(need < darray_max_alloc(itemSize) / 2); /* Overflow. */
    if (alloc == 0)
        alloc = 4;
    while (alloc < need)
        alloc *= 2;
    return alloc;
}

/*** Traversal ***/

#define darray_foreach(i, arr) \
    if ((arr).item) \
    for ((i) = &(arr).item[0]; (i) < &(arr).item[(arr).size]; (i)++)

#define darray_foreach_from(i, arr, from) \
    if ((arr).item) \
    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) \
    if ((arr).item) \
    for ((idx) = 0, (val) = &(arr).item[0]; \
         (idx) < (arr).size; \
         (idx)++, (val)++)

#define darray_enumerate_from(idx, val, arr, from) \
    if ((arr).item) \
    for ((idx) = (from), (val) = &(arr).item[from]; \
         (idx) < (arr).size; \
         (idx)++, (val)++)

#define darray_foreach_reverse(i, arr) \
    if ((arr).item) \
    for ((i) = &(arr).item[(arr).size - 1]; (arr).size > 0 && (i) >= &(arr).item[0]; (i)--)
kc3-lang/libxkbcommon/src/darray.h

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kc3-lang/libxkbcommon /src/darray.h
