How to Display UTF-8 Strings Correctly in Windows Consoles?

Encoding UTF-8 Strings for Display in Windows Consoles

When executing a Go executable in a Windows console, strings with special characters may appear mangled due to the console's default IBM850 encoding. Here's how to ensure that strings are correctly encoded and displayed:

Solution:

Utilize the WriteConsoleW function from the kernel32.dll library to write wide character (UTF-16) strings directly to the console, bypassing the default encoding.

Implementation:

<code class="go">import (
    "syscall"
    "unicode/utf16"
    "unsafe"
)

// Declare the WriteConsoleW function
var procWriteConsoleW = syscall.NewLazyDLL("kernel32.dll").NewProc("WriteConsoleW")

// Define a function to print a UTF-8 string to the console
func consolePrintString(strUtf8 string) {
    // Convert the UTF-8 string to UTF-16
    strUtf16 := utf16.Encode([]rune(strUtf8))

    // Write the UTF-16 string to the console
    syscall.Syscall6(procWriteConsoleW.Addr(), 5,
        uintptr(syscall.Stdout),
        uintptr(unsafe.Pointer(&strUtf16[0])),
        uintptr(len(strUtf16)),
        uintptr(unsafe.Pointer(nil)),
        uintptr(0),
        0)
}</code>

Example:

<code class="go">package main

import "fmt"

func main() {
    consolePrintString("Hello ☺\n")
    consolePrintString("éèïöîôùòèìë\n")
}</code>

This approach bypasses the console's default encoding, ensuring that strings with special characters are correctly displayed. Please note that it is Windows-specific and involves the use of undocumented methods.

The above is the detailed content of How to Display UTF-8 Strings Correctly in Windows Consoles?. For more information, please follow other related articles on the PHP Chinese website!