diff options
Diffstat (limited to 'ChibiOS_16.1.5/community/os/various/bitmap.c')
| -rw-r--r-- | ChibiOS_16.1.5/community/os/various/bitmap.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/ChibiOS_16.1.5/community/os/various/bitmap.c b/ChibiOS_16.1.5/community/os/various/bitmap.c deleted file mode 100644 index a17dfcb..0000000 --- a/ChibiOS_16.1.5/community/os/various/bitmap.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - ChibiOS/HAL - Copyright (C) 2015 Uladzimir Pylinsky aka barthess - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. -*/ - -/** - * @file bitmap.c - * @brief Bit map code. - * - * @addtogroup bitmap - * @{ - */ - -#include "string.h" /* for memset() */ - -#include "hal.h" -#include "bitmap.h" - -/*===========================================================================*/ -/* Module local definitions. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Module exported variables. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Module local types. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Module local variables. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Module local functions. */ -/*===========================================================================*/ - -/** - * @brief Get word number. - * - * @param[in] bit number of the bit - * - * @return Index of the word containing specified bit. - */ -static inline size_t word(size_t bit) { - return bit / (sizeof(bitmap_word_t) * 8); -} - -/** - * @brief Get bit position in word. - * - * @param[in] bit number of the bit - * - * @return Position of the specified bit related to word start. - */ -static inline size_t pos_in_word(size_t bit) { - return bit % (sizeof(bitmap_word_t) * 8); -} - -/*===========================================================================*/ -/* Module exported functions. */ -/*===========================================================================*/ -/** - * @brief Initializes an @p bitmap_t structure. - * - * @param[out] map the @p bitmap_t structure to be initialized - * @param[in] val the value to be written in all bitmap - */ -void bitmapObjectInit(bitmap_t *map, bitmap_word_t val) { - uint8_t pattern; - - osalDbgCheck(val == 1 || val == 0); - - if (val == 1) - pattern = 0xFF; - else - pattern = 0; - - memset(map->array, pattern, map->len*sizeof(bitmap_word_t)); -} - -/** - * @brief Set single bit in an @p bitmap_t structure. - * - * @param[out] map the @p bitmap_t structure - * @param[in] bit number of the bit to be set - */ -void bitmapSet(bitmap_t *map, size_t bit) { - size_t w = word(bit); - - osalDbgCheck(w < map->len); - map->array[w] |= (bitmap_word_t)1 << pos_in_word(bit); -} - -/** - * @brief Clear single bit in an @p bitmap_t structure. - * - * @param[out] map the @p bitmap_t structure - * @param[in] bit number of the bit to be cleared - */ -void bitmapClear(bitmap_t *map, size_t bit) { - size_t w = word(bit); - - osalDbgCheck(w < map->len); - map->array[w] &= ~((bitmap_word_t)1 << pos_in_word(bit)); -} - -/** - * @brief Invert single bit in an @p bitmap_t structure. - * - * @param[out] map the @p bitmap_t structure - * @param[in] bit number of the bit to be inverted - */ -void bitmapInvert(bitmap_t *map, size_t bit) { - size_t w = word(bit); - - osalDbgCheck(w < map->len); - map->array[w] ^= (bitmap_word_t)1 << pos_in_word(bit); -} - -/** - * @brief Get bit value from an @p bitmap_t structure. - * - * @param[in] map the @p bitmap_t structure - * @param[in] bit number of the requested bit - * - * @return Requested bit value. - */ -bitmap_word_t bitmapGet(const bitmap_t *map, size_t bit) { - size_t w = word(bit); - - osalDbgCheck(w < map->len); - return (map->array[w] >> pos_in_word(bit)) & 1; -} - -/** - * @brief Get total amount of bits in an @p bitmap_t structure. - * - * @param[in] map the @p bitmap_t structure - * - * @return Bit number. - */ -size_t bitmapGetBitsCount(const bitmap_t *map) { - return map->len * sizeof(bitmap_word_t) * 8; -} -/** @} */ |