functions_string.h

#ifndef FUNCTIONS_STRING_H
#define FUNCTIONS_STRING_H
 
//types of the code
#include "types.h"
#include "functions_type.h"
 
//regex header for string manipulation
#include <regex>
 
 
namespace functions_string {
 
    
    inline tString& ltrim(tString& s) {
        s=std::regex_replace(s, std::regex("^\\s+"), std::string(""));
        return s;
    }
    inline tString& rtrim(tString& s) {
        s=std::regex_replace(s, std::regex("\\s+$"), std::string(""));
        return s;
    }
    
    inline tString& trim(tString& s) {
        return ltrim(rtrim(s));
    }
    
    inline void replaceAll(const tString& word,const tString& rWord,tString& str) {
        tIndex pos = str.find(word);
        tIndex lWord=word.length();
        tIndex lrWord=rWord.length();
        // Repeat till end is reached
        while( pos != std::string::npos)
        {
            // Replace this occurrence of Sub String
            str.replace(pos, lWord , rWord);
            // Get the next occurrence from the current position
            pos =str.find(word, pos + lrWord);
        }
    }
    inline void replace(const tString& word,const tString& rWord,tString& str) {
        tIndex pos = str.find(word);
        tIndex lWord=word.length();
        // Repeat till end is reached
        if ( pos != std::string::npos) {
            // Replace this occurrence of Sub String
            str.replace(pos, lWord , rWord);
            
        }
    }
    inline void toLower(tString& s) {
        std::transform(s.cbegin(), s.cend(), s.begin(),
                       [](unsigned char c){ return std::tolower(c);});
    }
    inline void toUpper(tString& s) {
        tString r=s;//returned string
        std::transform(s.cbegin(), s.cend(), s.begin(),
                       [](unsigned char c){ return std::toupper(c);});
    }
 
    inline void tokenize(tString& str,
                         const tString& delim,
                         std::vector<tString>& words) {
        char *rest=&str[0];
        char *token;
        tString word;
        words.clear();
        while ( (token = strtok_r(rest,delim.c_str(),&rest))) {
            word=token;
            words.push_back(trim(word));
        }
    }
}
 
#endif