Ticket #2386: utf8.cc

#include <string>
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <strings.h>
#include <clocale>
#include <langinfo.h>
//#include <sys/param.h>

std::wstring To16Char(const std::string &asString)
{
        std::wstring wsTemp;
        size_t needed = std::mbstowcs(NULL, &asString[0],0);
        wsTemp.resize(needed);
        std::mbstowcs(&wsTemp[0],&asString[0],needed);

        return wsTemp;
}

//-----------------------------------------------------------------------

std::string To8Char(const std::wstring &awsString)
{
        std::string sTemp;
        size_t needed = std::wcstombs(NULL,&awsString[0],0);
        sTemp.resize(needed);
        std::wcstombs(&sTemp[0],&awsString[0],needed);

        return sTemp;
}

void ReadFile(std::string asFile)
{
        FILE *fp = fopen(asFile.c_str(),"r");
        if (fp) {
                char str[1024];
                fgets(str, 1024, fp);
                printf("File: %s Contents: %s\n", asFile.c_str(), str);
                fclose(fp);
        } else {
                std::cerr << "Error opening file:" << asFile << std::endl;
        }
}


int main (int argc, const char* const argv[])
{
        if(!std::setlocale(LC_CTYPE, "")) {
                std::cerr << "Can't set the specified locale! Check LANG, LC_CTYPE, LC_ALL." << std::endl;
                return 1;
        }
        char *charset = nl_langinfo(CODESET);
        bool utf8_mode = (strcasecmp(charset, "UTF-8") == 0);
        std::cerr << "UTF-8 Charset "
                        << std::string(utf8_mode ? "is" : "not")
                        << " available.\nCurrent LANG is " << std::string(getenv("LANG"))
                        << "\nCharset: " << charset <<"\n";

        std::string utf8 = "Hämtningar";
        std::cout << "This is a UTF-8 Conversion Test" << std::endl;
        
        std::wstring utf32 = L"";
        
        std::cout << "Initial UTF-8 " << utf8 << std::endl;
        utf32 = To16Char(utf8);
        
        printf("UTF-32 Version: '%ls'\n", utf32.c_str());
        
        utf8 = To8Char(utf32);
        
        printf("UTF-8 Again: '%s'\n", utf8.c_str());

#ifdef TESTFILE
        ReadFile("test.txt");

        char rpath[PATH_MAX];
        realpath("test.txt", rpath);
        printf("Full Path: %s\n",rpath);
        ReadFile(rpath);
        
        realpath(To8Char(L"test.txt").c_str(),rpath);
        utf32 = To16Char(rpath);
        printf("Full Path: %ls\n", utf32.c_str());
        utf8 = To8Char(utf32);
        printf("Full Path(8): %s\n",utf8.c_str());
        ReadFile(utf8.c_str());
#endif
        return 0;
}

// vim: set noet ts=4: