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244 lines
6.9 KiB
C
244 lines
6.9 KiB
C
2 days ago
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/******************************************************************************
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* file lib/management/file_fifo.c
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* author YuLiang
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* version 1.0.0
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* date 10-Jun-2025
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* brief This file provides all the file fifo operation functions.
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*
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******************************************************************************
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* Attention
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*
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* <h2><center>© COPYRIGHT(c) 2025 LandPower</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of LandPower nor the names of its contributors may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* 标准C库头文件. */
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <ctype.h>
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/* 用户代码头文件. */
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#include <file_fifo.h>
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Internal functions --------------------------------------------------------*/
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/* 创建目录 */
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int32_t _file_fifo_dir_create(char *dir)
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{
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uint32_t i = 0;
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uint32_t len = 0;
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len = strlen(dir);
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/* 循环创建前级目录 */
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for(i = 0; i < len; i++)
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{
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if(dir[i] == '/')
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{
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dir[i] = '\0';
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if(access(dir, 0) != 0)
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{
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mkdir(dir, 744);
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}
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dir[i] ='/';
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}
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}
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/* 创建最后级目录 */
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if(len > 0 && access(dir, 0) != 0)
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{
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mkdir(dir, 744);
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}
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return E_NONE;
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}
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/* Interface functions -------------------------------------------------------*/
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/* 写函数 */
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int32_t file_fifo_write(file_fifo_t *config, const char *content, int32_t len)
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{
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FILE *fp = NULL;
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char filename[FILE_FIFO_PATH_LEN];
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int32_t size = 0;
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if (config->index_max - config->index_min >= config->files_max)
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{
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return E_FULL;
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}
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/* 确认文件名 */
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snprintf(filename, FILE_FIFO_PATH_LEN, "%s/%lld", config->dir, config->index_max);
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/* 写入文件 */
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fp = fopen(filename, "w+");
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if (!fp)
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{
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DBG(DBG_M_FILE_FIFO_ERR, "Open %s ERROR\r\n", filename);
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return E_SYS_CALL;
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}
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size = fwrite(content, 1, len, fp);
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if (size != len)
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{
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fclose(fp);
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DBG(DBG_M_FILE_FIFO_ERR, "Write %s ERROR\r\n", filename);
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return E_SYS_CALL;
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}
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fclose(fp);
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config->index_max++;
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return E_NONE;
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}
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/* 读函数 */
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int32_t file_fifo_read(file_fifo_t *config, char *content, int32_t *len)
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{
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FILE *fp = NULL;
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char filename[FILE_FIFO_PATH_LEN];
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int32_t size = 0;
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if (config->index_max == config->index_min)
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{
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return E_EMPTY;
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}
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/* 确认文件名 */
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snprintf(filename, FILE_FIFO_PATH_LEN, "%s/%lld", config->dir, config->index_min);
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/* 打开文件 */
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fp = fopen(filename, "r");
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if (!fp)
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{
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file_fifo_delete_by_min_index(config);
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DBG(DBG_M_FILE_FIFO_ERR, "Open %s ERROR\r\n", filename);
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return E_SYS_CALL;
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}
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size = fread(content, 1, *len, fp);
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if (size <= 0)
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{
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fclose(fp);
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file_fifo_delete_by_min_index(config);
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DBG(DBG_M_FILE_FIFO_ERR, "Read %s ERROR\r\n", filename);
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return E_SYS_CALL;
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}
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*len = size;
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fclose(fp);
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return E_NONE;
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}
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/* 删除最小索引文件 */
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void file_fifo_delete_by_min_index(file_fifo_t *config)
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{
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char filename[FILE_FIFO_PATH_LEN];
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snprintf(filename, FILE_FIFO_PATH_LEN, "%s/%lld", config->dir, config->index_min);
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remove(filename);
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/* 更新最小索引 */
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config->index_min++;
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}
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/* 初始化最大最小索引, 这套接口不能在不同线程同时调用, 例如 write 接口只能在单一线程调用, read可以在另一个线程调用,
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但是 write 接口不能同时在两个线程调用 */
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int32_t file_fifo_init(file_fifo_t *config)
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{
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DIR *dir = opendir(config->dir);
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struct dirent *entry;
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uint8_t first = 1;
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int64_t index = 0;
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config->index_max = 0;
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config->index_min = 0;
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if (!dir)
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{
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/* 创建目录 */
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_file_fifo_dir_create(config->dir);
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}
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else
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{
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/* 初始化最大最小 index */
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while ((entry = readdir(dir)) != NULL)
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{
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if (entry->d_type != DT_REG)
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{
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continue;
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}
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if (!isdigit(entry->d_name[0]))
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{
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continue;
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}
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index = strtoll(entry->d_name, NULL, 10);
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if (first)
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{
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config->index_max = config->index_min = index;
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first = 0;
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}
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else
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{
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if (index > config->index_max)
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{
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config->index_max = index;
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}
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if (index < config->index_min)
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{
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config->index_min = index;
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}
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}
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}
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/* 非空目录最大索引要加一 */
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if (!first)
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{
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config->index_max++;
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}
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closedir(dir);
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}
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return E_NONE;
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}
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/************************ (C) COPYRIGHT LandPower ***** END OF FILE ****************/
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