C++文件系统操作6 - 跨平台实现查找指定文件夹下的特定文件

1. 关键词

C++ 文件系统操作查找指定文件夹下的特定文件跨平台

2. fileutil.h


#pragma once#include <string>
#include <cstdio>
#include <cstdint>
#include "filetype.h"
#include "filepath.h"namespace cutl
{/*** @brief The file guard class to manage the FILE pointer automatically.* file_guard object can close the FILE pointer automatically when his scope is exit.*/class file_guard{public:/*** @brief Construct a new file guard object** @param file the pointer of the FILE object*/explicit file_guard(FILE *file);/*** @brief Destroy the file guard object**/~file_guard();/*** @brief Get the FILE pointer.** @return FILE**/FILE *getfd() const;private:FILE *file_;};/*** @brief Find all files in a directory by name.** @param dirpath the filepath of the directory to be searched* @param name the name of the file to be found, substring match is supported.* @param recursive whether to search the whole directory recursively, default is false.* If true, means search the whole directory recursively, like the 'find' command.* @return filevec the vector of file_entity, filepaths in the directory.*/filevec find_files(const filepath &dirpath, const std::string &name, bool recursive = false);/*** @brief Find all files in a directory by extension.** @param dirpath the filepath of the directory to be searched* @param extension the extension of the file to be found, with dot, like ".txt".* @param recursive whether to search the whole directory recursively, default is false.* If true, means search the whole directory recursively, like the 'find' command.* @return filevec the vector of file_entity, filepaths in the directory.*/filevec find_files_by_extension(const filepath &dirpath, const std::string &extension, bool recursive = false);} // namespace cutl

3. fileutil.cpp

#include <cstdio>
#include <map>
#include <iostream>
#include <cstring>
#include <sys/stat.h>
#include "fileutil.h"
#include "inner/logger.h"
#include "inner/filesystem.h"
#include "strutil.h"namespace cutl
{file_guard::file_guard(FILE *file): file_(file){}file_guard::~file_guard(){if (file_){// CUTL_DEBUG("close file");int ret = fclose(file_);if (ret != 0){CUTL_ERROR("fail to close file, ret" + std::to_string(ret));}file_ = nullptr;}// ROBOLOG_DCHECK(file_ == nullptr);}FILE *file_guard::getfd() const{return file_;}filevec find_files(const filepath &dirpath, const std::string &name, bool recursive){filevec filelist = list_files(dirpath, filetype::all, recursive);filevec result;for (auto &file : filelist){if (file.type == filetype::directory){continue;}auto filename = cutl::path(file.filepath).basename();if (filename.find(name) != std::string::npos){result.emplace_back(file);}}return result;}filevec find_files_by_extension(const filepath &dirpath, const std::string &extension, bool recursive){filevec filelist = list_files(dirpath, filetype::all, recursive);filevec result;for (auto &file : filelist){if (file.type == filetype::directory){continue;}auto extname = cutl::path(file.filepath).extension();if (cutl::to_lower(extname) == cutl::to_lower(extension)){result.emplace_back(file);}}return result;}