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本篇文章给大家分享的是有关boost中如何使用filesystem库,小编觉得挺实用的,因此分享给大家学习,希望大家阅读完这篇文章后可以有所收获,话不多说,跟着小编一起来看看吧。
ma_dir_op.h:
//////////////////////////////////////////////////////////////// // //Descript: directory operation class // Author: guowenyan // Date: 2013.06.13 // //////////////////////////////////////////////////////////////// #pragma once #include <string> #include <vector> class CMaDirOperation { public: static CMaDirOperation *get_instance(); public: bool traverse_path(std::vector<std::string> &vec_file_name, const std::string &path, const std::string &file_type = "") const; bool is_file_exist(const std::string &path, const std::string &file_name) const; bool is_file_exist(const std::string &file_name) const; bool delete_file(const std::string &path, const std::string &file_name) const; bool delete_file(const std::string &file_name) const; bool delete_directory(const std::string &path_name) const; void copy_file(const std::string &s_file_name, const std::string &d_file_name) const; void copy_directory(const std::string &s_path_name, const std::string &d_path_name) const; bool chang_file_type(const std::string &file_name, const std::string &s_file_type, const std::string &d_file_type, std::string &changed_file_name) const; private: CMaDirOperation() { }; ~CMaDirOperation() { }; bool is_file_type(const std::string &file_name, const std::string &file_type) const; private: static CMaDirOperation* m_p_instance; };
ma_dir_op.cpp:
//////////////////////////////////////////////////////////////// // //Descript: directory operation class // Author: guowenyan // Date: 2013.06.13 // //////////////////////////////////////////////////////////////// #include "ma_dir_op.h" #include <iostream> #include <boost/filesystem.hpp> using namespace std; namespace fs = boost::filesystem; CMaDirOperation* CMaDirOperation::m_p_instance = NULL; CMaDirOperation* CMaDirOperation::get_instance() { if(NULL == m_p_instance) m_p_instance = new CMaDirOperation(); return m_p_instance; } bool CMaDirOperation::traverse_path(vector<string> &vec_file_name, const string &path, const string &file_type/* = ""*/) const { if(!fs::exists(path)) { cout<<"the path "<<path.c_str()<<" is not exist."<<endl; return false; } if(!fs::is_directory(path)) { cout<<"the path "<<path.c_str()<<" is not a directory."<<endl; return false; } fs::directory_iterator ite_begin(path); fs::directory_iterator ite_end; for(; ite_begin != ite_end; ite_begin++) { fs::path path_tmp(*ite_begin); if(fs::is_regular_file(path_tmp)) { path_tmp = path_tmp.filename(); string str = path_tmp.string(); if(is_file_type(str, file_type)) vec_file_name.push_back(str); } } return true; } bool CMaDirOperation::is_file_exist(const string &path, const string &file_name) const { string t_path = path; if( *(t_path.end()-1) != '/' ) { t_path += '/'; } return is_file_exist(t_path + file_name);; } bool CMaDirOperation::is_file_exist(const string &file_name) const { fs::path path_file(file_name); if(!fs::exists(path_file)) { return false; } return fs::is_regular_file(path_file); } bool CMaDirOperation::delete_file(const std::string &path, const std::string &file_name) const { string t_path = path; if( *(t_path.end()-1) != '/' ) { t_path += '/'; } return delete_file(t_path + file_name);; } bool CMaDirOperation::delete_file(const std::string &file_name) const { /*fs::path path_file(file_name); if(!fs::exists(path_file) || !fs::is_regular_file(path_file)) { return false; } return fs::remove(path_file);*/ return true; } bool CMaDirOperation::delete_directory(const std::string &path_name) const { vector<string> vec_file_name; if(!traverse_path(vec_file_name, path_name)) return false; vector<string>::iterator ite = vec_file_name.begin(); for(; ite != vec_file_name.end(); ite++) { delete_file(path_name + (*ite)); } return true; } void CMaDirOperation::copy_file(const string &s_file_name, const string &d_file_name) const { fs::path s_path(s_file_name); fs::path d_path(d_file_name); fs::copy_file(s_path, d_path, fs::copy_option::fail_if_exists); } void CMaDirOperation::copy_directory(const std::string &s_path_name, const std::string &d_path_name) const { vector<string> vec_file_name; if(traverse_path(vec_file_name, s_path_name)) { vector<string>::iterator ite = vec_file_name.begin(); for(; ite != vec_file_name.end(); ite++) { copy_file(s_path_name + (*ite), d_path_name + (*ite)); } } } bool CMaDirOperation::chang_file_type(const string &file_name, const std::string &s_file_type, const std::string &d_file_type, std::string &changed_file_name) const { if(!is_file_type(file_name, s_file_type)) { cout<<"File name "<<file_name.c_str()<<" is not mached file type "<<s_file_type.c_str()<<" in CMaDirOperation::chang_file_type()."<<endl; return false; } changed_file_name = file_name; int len = s_file_type.length(); changed_file_name.replace(changed_file_name.length()-len, len, d_file_type); return true; } bool CMaDirOperation::is_file_type(const string &file_name, const string &file_type) const { string str = file_name; int len = file_type.length(); if(0 == str.substr(str.length()-len, len).compare(file_type)) return true; return false; }
以上就是boost中如何使用filesystem库,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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