有没有一种标准的方法来使用unicode字符串文件路径进行fopen？

FILE *_wfopen(
   const wchar_t *filename,
   const wchar_t *mode
);

#include<stdio.h>
#include <stdlib.h>
#include<string.h>
#include <iconv.h>

int main() {
    const char* input = "你好.txt";
    size_t input_len = strlen(input);
    char* output = (char*)malloc(input_len * 4 + 1);
    memset(output, 0, input_len * 4 + 1);

    iconv_t cd = iconv_open("UTF-8", "GBK");
    if (cd == (iconv_t)-1) {
        perror("iconv_open");
        return 1;
    }

    char* inbuf = (char*)input;
    size_t inbytesleft = input_len;
    char* outbuf = output;
    size_t outbytesleft = input_len * 4;

    if (iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft) == -1) {
        perror("iconv");
        return 1;
    }

    iconv_close(cd);

    FILE* fp = fopen(output, "r");
    if (fp == NULL) {
        perror("fopen");
        return 1;
    }

    // 处理文件

    fclose(fp);
    free(output);

    return 0;
}