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ring0_mipt |
/*
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* Copyright (c) 2016 by Alex I. Kuznetsov.
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*
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* Part of the LXP32 CPU IP core.
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*
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* This module implements members of the Utils namespace.
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*/
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#include "utils.h"
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#include <iostream>
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#include <fstream>
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#include <algorithm>
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#include <stdexcept>
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#include <cstring>
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std::string Utils::urlEncode(const std::string &str) {
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std::string res;
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for(std::size_t i=0;i<str.size();i++) {
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char ch=str[i];
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if(ch>='A'&&ch<='Z') res.push_back(ch);
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else if(ch>='a'&&ch<='z') res.push_back(ch);
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else if(ch>='0'&&ch<='9') res.push_back(ch);
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else if(ch=='-'||ch=='_'||ch=='.'||ch=='~') res.push_back(ch);
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else res+="%"+hex(ch);
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}
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return res;
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}
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std::string Utils::urlDecode(const std::string &str) {
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std::string res;
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for(std::size_t i=0;i<str.size();i++) {
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char ch=str[i];
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if(ch!='%') res.push_back(ch);
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else {
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auto hexcode=str.substr(i+1,2);
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i+=hexcode.size();
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try {
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if(hexcode.size()!=2) throw std::exception();
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auto u=static_cast<unsigned char>(std::stoul(hexcode,nullptr,16));
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res.push_back(static_cast<char>(u));
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}
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catch(std::exception &) {
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throw std::runtime_error("Ill-formed URL-encoded string");
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}
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}
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}
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return res;
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}
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std::string Utils::normalizeSeparators(const std::string &path) {
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std::string str(path);
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#ifdef _WIN32
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std::replace(str.begin(),str.end(),'\\','/');
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#endif
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return str;
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}
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std::string Utils::nativeSeparators(const std::string &path) {
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std::string str(path);
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#ifdef _WIN32
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std::replace(str.begin(),str.end(),'/','\\');
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#endif
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return str;
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}
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bool Utils::isAbsolutePath(const std::string &path) {
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auto native=nativeSeparators(path);
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if(native.empty()) return false;
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if(native[0]=='/') return true;
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#ifdef _WIN32
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if(native.size()>1&&native[1]==':') return true;
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#endif
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return false;
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}
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bool Utils::fileExists(const std::string &path) {
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std::ifstream in(nativeSeparators(path),std::ios_base::in);
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if(!in) return false;
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return true;
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}
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std::string Utils::relativePath(const std::string &from,const std::string &to) {
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// Normalize directory separators
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auto nfrom=normalizeSeparators(from);
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auto nto=normalizeSeparators(to);
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if(nto.empty()) return std::string();
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// If "nto" is an absolute path, just return it
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if(isAbsolutePath(nto)) return nativeSeparators(nto);
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// Process relative path
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auto pos=nfrom.find_last_of('/');
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if(pos==std::string::npos) return nativeSeparators(nto);
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else return nativeSeparators(nfrom.substr(0,pos+1)+nto);
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}
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std::string Utils::dequoteString(const std::string &str) {
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if(str.size()<2) throw std::runtime_error("String literal expected");
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if(str.front()!='\"'||str.back()!='\"') throw std::runtime_error("String literal expected");
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return str.substr(1,str.size()-2);
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}
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bool Utils::ishexdigit(char ch) {
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static const char *digits="0123456789ABCDEFabcdef";
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return (std::strchr(digits,ch)!=NULL);
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}
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bool Utils::isoctdigit(char ch) {
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static const char *digits="01234567";
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return (std::strchr(digits,ch)!=NULL);
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}
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