darray.h

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Author : Peter Hutterer
Date : 2020-05-12 14:09:50
Hash : afb26e7d
Message : Add libxkbregistry to query available RMLVO This library is the replacement for clients parsing evdev.xml directly. Instead, they should use the API here so that in the future we may even be able to swap evdev.xml for a more suitable data format. The library parses through evdev.xml (using libxml2) and - if requested - through evdev.extras.xml as well. The merge approach is optimised for the default case where we have a system-installed rules XML and another file in $XDG_CONFIG_DIR that adds a few entries. We load the system file first, then append any custom ones to that. It's not possible to overwrite the MLVO list provided by the system files - if you want to do that, get the change upstream. XML validation is handled through the DTD itself which means we only need to check for a nonempty name, everything else the DTD validation should complain about. The logging system is effectively identical to xkbcommon. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/darray.h

/*
 * 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: 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_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) \
    darray_append_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)

#define darray_shrink(arr) do { \
    if ((arr).size > 0) \
        (arr).item = realloc((arr).item, \
                             ((arr).alloc = (arr).size) * 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 - 1]; (arr).size > 0 && (i) >= &(arr).item[0]; (i)--)

#endif /* CCAN_DARRAY_H */

kc3-lang/libxkbcommon/src/darray.h

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kc3-lang/libxkbcommon /src/darray.h