Function walkInDir

Core/MemoryFile.cpp:633–677

#endif // !defined(MMKV_APPLE)

void walkInDir(const MMKVPath_t &dirPath, WalkType type, const function<void(const MMKVPath_t&, WalkType)> &walker) {
    auto folderPathStr = dirPath.data();
    DIR *dir = opendir(folderPathStr);
    if (!dir) {
        MMKVError("opendir failed: %d(%s), %s", errno, strerror(errno), dirPath.c_str());
        return;
    }

    char childPath[PATH_MAX];
    size_t folderPathLength = dirPath.size();
    strncpy(childPath, folderPathStr, folderPathLength + 1);
    if (folderPathStr[folderPathLength - 1] != '/') {
        childPath[folderPathLength] = '/';
        folderPathLength++;
    }

    while (auto child = readdir(dir)) {
        if ((child->d_type & DT_REG) && (type & WalkFile)) {
#if defined(_DIRENT_HAVE_D_NAMLEN) || defined(__APPLE__)
            stpcpy(childPath + folderPathLength, child->d_name);
            childPath[folderPathLength + child->d_namlen] = 0;
#else
            strcpy(childPath + folderPathLength, child->d_name);
#endif
            walker(childPath, WalkFile);
        } else if ((child->d_type & DT_DIR) && (type & WalkFolder)) {
#if defined(_DIRENT_HAVE_D_NAMLEN) || defined(__APPLE__)
            if ((child->d_namlen == 1 && child->d_name[0] == '.') ||
                (child->d_namlen == 2 && child->d_name[0] == '.' && child->d_name[1] == '.')) {
                continue;
            }
            stpcpy(childPath + folderPathLength, child->d_name);
            childPath[folderPathLength + child->d_namlen] = 0;
#else
            if (strcmp(child->d_name, ".") == 0 || strcmp(child->d_name, "..") == 0) {
                continue;
            }
            strcpy(childPath + folderPathLength, child->d_name);
#endif
            walker(childPath, WalkFolder);
        }
    }

    closedir(dir);
}

bool deleteFile(const MMKVPath_t &path) {
    auto filename = path.c_str();