If your compiler allows it you can replace "w"
with "w,ccs=UTF-8"
in fopen
call.
how to save a file using fwprintf in utf-8 format
-
15-07-2023 - |
Pregunta
Friends,
I am a beginner in c++ and I am using vc 6.0 to write a file in utf-8 encoding.
I am using fwprintf function for this. but the file is coming in ANSI coding. can anybody tell me how to save a file in utf-8 using fwprintf().
Here is my code,
#include "stdafx.h"
#include "wchar.h"
#include "windows.h"
int main(int argc, char* argv[])
{
FILE *file;
file = fopen ("abc.txt","w");
fwprintf(file, L"This is my utf-8 encoded file");
fclose(file);
WinExec("\"C:\\Program Files\\EditPlus 3\\editplus.exe\abc.txt", SW_SHOWNORMAL);
return 0;
}
Solución 2
Otros consejos
fopen()
does not support encodings in VC6, so you will have to manage the encoding manually in code instead, eg:
#include "stdafx.h"
#include "wchar.h"
#include "windows.h"
bool writeUtf8StrToFile(FILE *file, const wchar_t *str)
{
if (!file) return false;
int wlen = lstrlenW(str);
if (wlen == 0) return true;
int utf8len = WideCharToMultiByte(CP_UTF8, 0, str, wlen, NULL, 0, NULL, NULL);
if (utf8len == 0) return false;
char *utf8 = (char*) malloc(utf8len);
if (!utf8) return false;
utf8len = WideCharToMultiByte(CP_UTF8, 0, str, wlen, utf8, utf8len, NULL, NULL);
if (utf8len == 0) return false;
fwrite(utf8, 1, utf8len, file);
free(utf8);
return true;
}
int main(int argc, char* argv[])
{
FILE *file = fopen ("abc.txt", "wb");
if (file)
{
writeUtf8StrToFile(file, L"This is my utf-8 encoded file");
fclose(file);
WinExec("\"C:\\Program Files\\EditPlus 3\\editplus.exe\" abc.txt", SW_SHOWNORMAL);
}
return 0;
}
Alternatively (since you did say you are using C++ and not C, which the above code is):
#include "stdafx.h"
#include "wchar.h"
#include "windows.h"
#include <fstream>
#include <string>
bool writeUtf8StrToFile(std::ofstream &file, const std::wstring &str)
{
{
if (!file.is_open()) return false;
if (str.empty()) return true;
int utf8len = WideCharToMultiByte(CP_UTF8, 0, str.c_str(), str.length(), NULL, 0, NULL, NULL);
if (utf8len == 0) return false;
std::string utf8(utf8len, '\0');
WideCharToMultiByte(CP_UTF8, 0, str.c_str(), str.length(), &utf8[0], utf8len, NULL, NULL);
file << utf8;
return true;
}
int main(int argc, char* argv[])
{
std::ofstream file("abc.txt", std::ios::out | std::ios::binary);
if (file.is_open())
{
writeUtf8StrToFile(file, L"This is my utf-8 encoded file");
file.close();
WinExec("\"C:\\Program Files\\EditPlus 3\\editplus.exe\" abc.txt", SW_SHOWNORMAL);
}
return 0;
}
Alternatively, use the UTF-8 library from this article, eg:
#include "stdafx.h"
#include "wchar.h"
#include "windows.h"
#include <fstream>
#include <string>
#include <iterator>
#include "utf8.h"
int main(int argc, char* argv[])
{
std::ofstream file("abc.txt", std::ios::out | std::ios::binary);
if (file.is_open())
{
std::wstring utf16str = L"This is my utf-8 encoded file";
std::string utf8str;
utf8::utf16to8(utf16str.begin(), utf16str.end(), std::back_inserter(utf8str));
file << utf8str;
file.close();
WinExec("\"C:\\Program Files\\EditPlus 3\\editplus.exe\" abc.txt", SW_SHOWNORMAL);
}
return 0;
}
Alternatively, use the UTF-8 stream convertor from this article, eg:
#include "stdafx.h"
#include "wchar.h"
#include "windows.h"
#include <fstream>
#include "stxutif.h"
int main(int argc, char* argv[])
{
std::wofstream fs("abc.txt", std::ios::out);
if (file.is_open())
{
std::locale utf8_locale(std::locale(), new utf8cvt<false>);
file.imbue(utf8_locale);
file << L"This is my utf-8 encoded file";
file.close();
WinExec("\"C:\\Program Files\\EditPlus 3\\editplus.exe\" abc.txt", SW_SHOWNORMAL);
}
return 0;
}
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