mirror of
https://github.com/brl/mutter.git
synced 2024-11-25 09:30:45 -05:00
a81435ab5f
This basically reverts commit 54735dec, which tried to avoid the
GLib-defined types in favor the standard C ones. One exception to this
is the bool type, for which the commit introduces a new type CoglBool.
Let's just get rid of this type in favor of having consistency with the
GLib types. Note by the way that neither CoglBool nor gboolean (which
has a size of `int`) are completely compatible with bool (size `char`).
https://gitlab.gnome.org/GNOME/mutter/merge_requests/321
490 lines
13 KiB
C
490 lines
13 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2010 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#include "cogl-config.h"
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#include <glib.h>
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#include <string.h>
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#include <test-fixtures/test-unit.h>
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#include "cogl-bitmask.h"
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#include "cogl-util.h"
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#include "cogl-flags.h"
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/* This code assumes that we can cast an unsigned long to a pointer
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and back without losing any data */
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_COGL_STATIC_ASSERT (sizeof (unsigned long) <= sizeof (void *),
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"This toolchain breaks Cogl's assumption that it can "
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"safely cast an unsigned long to a pointer without "
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"loosing data");
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#define ARRAY_INDEX(bit_num) \
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((bit_num) / (sizeof (unsigned long) * 8))
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#define BIT_INDEX(bit_num) \
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((bit_num) & (sizeof (unsigned long) * 8 - 1))
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#define BIT_MASK(bit_num) \
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(1UL << BIT_INDEX (bit_num))
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gboolean
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_cogl_bitmask_get_from_array (const CoglBitmask *bitmask,
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unsigned int bit_num)
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{
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GArray *array = (GArray *) *bitmask;
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/* If the index is off the end of the array then assume the bit is
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not set */
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if (bit_num >= sizeof (unsigned long) * 8 * array->len)
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return FALSE;
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else
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return !!(g_array_index (array, unsigned long, ARRAY_INDEX (bit_num)) &
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BIT_MASK (bit_num));
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}
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static void
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_cogl_bitmask_convert_to_array (CoglBitmask *bitmask)
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{
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GArray *array;
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/* Fetch the old values */
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unsigned long old_values = _cogl_bitmask_to_bits (bitmask);
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array = g_array_new (FALSE, /* not zero-terminated */
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TRUE, /* do clear new entries */
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sizeof (unsigned long));
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/* Copy the old values back in */
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g_array_append_val (array, old_values);
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*bitmask = (struct _CoglBitmaskImaginaryType *) array;
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}
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void
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_cogl_bitmask_set_in_array (CoglBitmask *bitmask,
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unsigned int bit_num,
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gboolean value)
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{
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GArray *array;
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unsigned int array_index;
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unsigned long new_value_mask;
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/* If the bitmask is not already an array then we need to allocate one */
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if (!_cogl_bitmask_has_array (bitmask))
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_cogl_bitmask_convert_to_array (bitmask);
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array = (GArray *) *bitmask;
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array_index = ARRAY_INDEX (bit_num);
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/* Grow the array if necessary. This will clear the new data */
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if (array_index >= array->len)
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g_array_set_size (array, array_index + 1);
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new_value_mask = BIT_MASK (bit_num);
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if (value)
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g_array_index (array, unsigned long, array_index) |= new_value_mask;
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else
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g_array_index (array, unsigned long, array_index) &= ~new_value_mask;
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}
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void
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_cogl_bitmask_set_bits (CoglBitmask *dst,
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const CoglBitmask *src)
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{
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if (_cogl_bitmask_has_array (src))
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{
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GArray *src_array, *dst_array;
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int i;
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if (!_cogl_bitmask_has_array (dst))
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_cogl_bitmask_convert_to_array (dst);
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dst_array = (GArray *) *dst;
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src_array = (GArray *) *src;
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if (dst_array->len < src_array->len)
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g_array_set_size (dst_array, src_array->len);
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for (i = 0; i < src_array->len; i++)
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g_array_index (dst_array, unsigned long, i) |=
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g_array_index (src_array, unsigned long, i);
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}
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else if (_cogl_bitmask_has_array (dst))
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{
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GArray *dst_array;
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dst_array = (GArray *) *dst;
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g_array_index (dst_array, unsigned long, 0) |=
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_cogl_bitmask_to_bits (src);
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}
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else
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*dst = _cogl_bitmask_from_bits (_cogl_bitmask_to_bits (dst) |
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_cogl_bitmask_to_bits (src));
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}
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void
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_cogl_bitmask_set_range_in_array (CoglBitmask *bitmask,
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unsigned int n_bits,
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gboolean value)
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{
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GArray *array;
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unsigned int array_index, bit_index;
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if (n_bits == 0)
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return;
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/* If the bitmask is not already an array then we need to allocate one */
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if (!_cogl_bitmask_has_array (bitmask))
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_cogl_bitmask_convert_to_array (bitmask);
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array = (GArray *) *bitmask;
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/* Get the array index of the top most value that will be touched */
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array_index = ARRAY_INDEX (n_bits - 1);
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/* Get the bit index of the top most value */
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bit_index = BIT_INDEX (n_bits - 1);
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/* Grow the array if necessary. This will clear the new data */
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if (array_index >= array->len)
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g_array_set_size (array, array_index + 1);
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if (value)
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{
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/* Set the bits that are touching this index */
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g_array_index (array, unsigned long, array_index) |=
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~0UL >> (sizeof (unsigned long) * 8 - 1 - bit_index);
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/* Set all of the bits in any lesser indices */
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memset (array->data, 0xff, sizeof (unsigned long) * array_index);
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}
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else
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{
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/* Clear the bits that are touching this index */
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g_array_index (array, unsigned long, array_index) &= ~1UL << bit_index;
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/* Clear all of the bits in any lesser indices */
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memset (array->data, 0x00, sizeof (unsigned long) * array_index);
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}
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}
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void
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_cogl_bitmask_xor_bits (CoglBitmask *dst,
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const CoglBitmask *src)
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{
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if (_cogl_bitmask_has_array (src))
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{
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GArray *src_array, *dst_array;
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int i;
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if (!_cogl_bitmask_has_array (dst))
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_cogl_bitmask_convert_to_array (dst);
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dst_array = (GArray *) *dst;
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src_array = (GArray *) *src;
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if (dst_array->len < src_array->len)
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g_array_set_size (dst_array, src_array->len);
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for (i = 0; i < src_array->len; i++)
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g_array_index (dst_array, unsigned long, i) ^=
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g_array_index (src_array, unsigned long, i);
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}
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else if (_cogl_bitmask_has_array (dst))
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{
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GArray *dst_array;
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dst_array = (GArray *) *dst;
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g_array_index (dst_array, unsigned long, 0) ^=
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_cogl_bitmask_to_bits (src);
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}
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else
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*dst = _cogl_bitmask_from_bits (_cogl_bitmask_to_bits (dst) ^
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_cogl_bitmask_to_bits (src));
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}
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void
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_cogl_bitmask_clear_all_in_array (CoglBitmask *bitmask)
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{
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GArray *array = (GArray *) *bitmask;
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memset (array->data, 0, sizeof (unsigned long) * array->len);
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}
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void
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_cogl_bitmask_foreach (const CoglBitmask *bitmask,
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CoglBitmaskForeachFunc func,
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void *user_data)
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{
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if (_cogl_bitmask_has_array (bitmask))
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{
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GArray *array = (GArray *) *bitmask;
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const unsigned long *values = &g_array_index (array, unsigned long, 0);
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int bit_num;
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COGL_FLAGS_FOREACH_START (values, array->len, bit_num)
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{
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if (!func (bit_num, user_data))
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return;
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}
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COGL_FLAGS_FOREACH_END;
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}
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else
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{
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unsigned long mask = _cogl_bitmask_to_bits (bitmask);
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int bit_num;
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COGL_FLAGS_FOREACH_START (&mask, 1, bit_num)
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{
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if (!func (bit_num, user_data))
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return;
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}
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COGL_FLAGS_FOREACH_END;
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}
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}
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void
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_cogl_bitmask_set_flags_array (const CoglBitmask *bitmask,
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unsigned long *flags)
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{
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const GArray *array = (const GArray *) *bitmask;
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int i;
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for (i = 0; i < array->len; i++)
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flags[i] |= g_array_index (array, unsigned long, i);
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}
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int
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_cogl_bitmask_popcount_in_array (const CoglBitmask *bitmask)
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{
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const GArray *array = (const GArray *) *bitmask;
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int pop = 0;
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int i;
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for (i = 0; i < array->len; i++)
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pop += _cogl_util_popcountl (g_array_index (array, unsigned long, i));
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return pop;
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}
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int
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_cogl_bitmask_popcount_upto_in_array (const CoglBitmask *bitmask,
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int upto)
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{
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const GArray *array = (const GArray *) *bitmask;
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if (upto >= array->len * sizeof (unsigned long) * 8)
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return _cogl_bitmask_popcount_in_array (bitmask);
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else
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{
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unsigned long top_mask;
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int array_index = ARRAY_INDEX (upto);
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int bit_index = BIT_INDEX (upto);
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int pop = 0;
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int i;
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for (i = 0; i < array_index; i++)
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pop += _cogl_util_popcountl (g_array_index (array, unsigned long, i));
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top_mask = g_array_index (array, unsigned long, array_index);
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return pop + _cogl_util_popcountl (top_mask & ((1UL << bit_index) - 1));
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}
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}
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typedef struct
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{
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int n_bits;
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int *bits;
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} CheckData;
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static gboolean
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check_bit (int bit_num, void *user_data)
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{
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CheckData *data = user_data;
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int i;
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for (i = 0; i < data->n_bits; i++)
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if (data->bits[i] == bit_num)
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{
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data->bits[i] = -1;
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return TRUE;
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}
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g_assert_not_reached ();
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return TRUE;
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}
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static void
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verify_bits (const CoglBitmask *bitmask,
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...)
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{
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CheckData data;
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va_list ap, ap_copy;
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int i;
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va_start (ap, bitmask);
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G_VA_COPY (ap_copy, ap);
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for (data.n_bits = 0; va_arg (ap, int) != -1; data.n_bits++);
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data.bits = alloca (data.n_bits * (sizeof (int)));
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G_VA_COPY (ap, ap_copy);
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for (i = 0; i < data.n_bits; i++)
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data.bits[i] = va_arg (ap, int);
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_cogl_bitmask_foreach (bitmask, check_bit, &data);
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for (i = 0; i < data.n_bits; i++)
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g_assert_cmpint (data.bits[i], ==, -1);
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g_assert_cmpint (_cogl_bitmask_popcount (bitmask), ==, data.n_bits);
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for (i = 0; i < 1024; i++)
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{
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int upto_popcount = 0;
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int j;
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G_VA_COPY (ap, ap_copy);
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for (j = 0; j < data.n_bits; j++)
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if (va_arg (ap, int) < i)
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upto_popcount++;
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g_assert_cmpint (_cogl_bitmask_popcount_upto (bitmask, i),
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==,
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upto_popcount);
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G_VA_COPY (ap, ap_copy);
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for (j = 0; j < data.n_bits; j++)
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if (va_arg (ap, int) == i)
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break;
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g_assert_cmpint (_cogl_bitmask_get (bitmask, i), ==, (j < data.n_bits));
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}
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}
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UNIT_TEST (check_bitmask_api,
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0 /* no requirements */,
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0 /* no failure cases */)
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{
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CoglBitmask bitmask;
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CoglBitmask other_bitmask;
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/* A dummy bit to make it use arrays sometimes */
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int dummy_bit;
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int i;
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for (dummy_bit = -1; dummy_bit < 256; dummy_bit += 40)
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{
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_cogl_bitmask_init (&bitmask);
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_cogl_bitmask_init (&other_bitmask);
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if (dummy_bit != -1)
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_cogl_bitmask_set (&bitmask, dummy_bit, TRUE);
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verify_bits (&bitmask, dummy_bit, -1);
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_cogl_bitmask_set (&bitmask, 1, TRUE);
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_cogl_bitmask_set (&bitmask, 4, TRUE);
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_cogl_bitmask_set (&bitmask, 5, TRUE);
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verify_bits (&bitmask, 1, 4, 5, dummy_bit, -1);
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_cogl_bitmask_set (&bitmask, 4, FALSE);
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verify_bits (&bitmask, 1, 5, dummy_bit, -1);
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_cogl_bitmask_clear_all (&bitmask);
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verify_bits (&bitmask, -1);
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if (dummy_bit != -1)
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_cogl_bitmask_set (&bitmask, dummy_bit, TRUE);
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verify_bits (&bitmask, dummy_bit, -1);
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_cogl_bitmask_set (&bitmask, 1, TRUE);
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_cogl_bitmask_set (&bitmask, 4, TRUE);
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_cogl_bitmask_set (&bitmask, 5, TRUE);
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_cogl_bitmask_set (&other_bitmask, 5, TRUE);
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_cogl_bitmask_set (&other_bitmask, 6, TRUE);
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_cogl_bitmask_set_bits (&bitmask, &other_bitmask);
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verify_bits (&bitmask, 1, 4, 5, 6, dummy_bit, -1);
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verify_bits (&other_bitmask, 5, 6, -1);
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_cogl_bitmask_set (&bitmask, 6, FALSE);
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verify_bits (&bitmask, 1, 4, 5, dummy_bit, -1);
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_cogl_bitmask_xor_bits (&bitmask, &other_bitmask);
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verify_bits (&bitmask, 1, 4, 6, dummy_bit, -1);
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verify_bits (&other_bitmask, 5, 6, -1);
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_cogl_bitmask_set_range (&bitmask, 5, TRUE);
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verify_bits (&bitmask, 0, 1, 2, 3, 4, 6, dummy_bit, -1);
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_cogl_bitmask_set_range (&bitmask, 4, FALSE);
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verify_bits (&bitmask, 4, 6, dummy_bit, -1);
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_cogl_bitmask_destroy (&other_bitmask);
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_cogl_bitmask_destroy (&bitmask);
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}
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/* Extra tests for really long bitmasks */
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_cogl_bitmask_init (&bitmask);
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_cogl_bitmask_set_range (&bitmask, 400, TRUE);
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_cogl_bitmask_init (&other_bitmask);
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_cogl_bitmask_set (&other_bitmask, 5, TRUE);
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_cogl_bitmask_xor_bits (&bitmask, &other_bitmask);
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for (i = 0; i < 1024; i++)
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g_assert_cmpint (_cogl_bitmask_get (&bitmask, i),
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==,
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(i == 5 ? FALSE :
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i < 400 ? TRUE :
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FALSE));
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_cogl_bitmask_set_range (&other_bitmask, 500, TRUE);
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_cogl_bitmask_set_bits (&bitmask, &other_bitmask);
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for (i = 0; i < 1024; i++)
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g_assert_cmpint (_cogl_bitmask_get (&bitmask, i), ==, (i < 500));
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}
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