60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* Copyright (c) 2025, LISTENAI
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "dirent.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "lsfs.h"
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#include "sysheap.h"
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// DIR 结构体，内部持有 lsfs_dir_t 和 struct dirent 缓存
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struct DIR {
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struct lsfs_dir_t lsfs_dir;
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struct dirent entry;
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int end; // 标记目录是否读取完毕
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};
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DIR *opendir(const char *name) {
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DIR *dir = (DIR *)exram_malloc(4, sizeof(DIR));
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if (!dir) return NULL;
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memset(dir, 0, sizeof(DIR));
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int ret = lsfs_opendir(&dir->lsfs_dir, name);
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if (ret != 0) {
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exram_free(dir);
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return NULL;
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}
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dir->end = 0;
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return dir;
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}
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struct dirent *readdir(DIR *dirp) {
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if (!dirp || dirp->end) return NULL;
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struct lsfs_dirent lsfs_entry;
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int ret = lsfs_readdir(&dirp->lsfs_dir, &lsfs_entry);
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if (ret < 0) {
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dirp->end = 1;
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return NULL;
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}
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if (lsfs_entry.name[0] == 0) { // 目录尾
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dirp->end = 1;
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return NULL;
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}
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// 填充 struct dirent
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memset(&dirp->entry, 0, sizeof(struct dirent));
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dirp->entry.d_type = (lsfs_entry.type == LSFS_DIR_ENTRY_DIR) ? 4 : 8; // DT_DIR=4, DT_REG=8
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strncpy(dirp->entry.d_name, lsfs_entry.name, sizeof(dirp->entry.d_name) - 1);
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dirp->entry.d_name[sizeof(dirp->entry.d_name)-1] = '\0';
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return &dirp->entry;
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}
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int closedir(DIR *dirp) {
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if (!dirp) return -1;
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lsfs_closedir(&dirp->lsfs_dir);
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exram_free(dirp);
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return 0;
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}
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