linux c 编码转换

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

int convert(const char *from_charset, const char *to_charset, char *inbuf, size_t inlen, char *outbuf, size_t outlen) {
    iconv_t cd = iconv_open(to_charset, from_charset);
    if (cd == (iconv_t)-1) return -1;

    char *pin = inbuf;
    char *pout = outbuf;
    size_t inbytesleft = inlen;
    size_t outbytesleft = outlen;

    if (iconv(cd, &pin, &inbytesleft, &pout, &outbytesleft) == (size_t)-1) {
        iconv_close(cd);
        return -1;
    }

    iconv_close(cd);
    return 0;
}

int main() {
    char in[] = "你好，世界！"; // UTF-8编码的字符串
    char out[50];
    memset(out, 0, sizeof(out));

    if (convert("UTF-8", "GBK", in, strlen(in), out, sizeof(out)) == 0) {
        printf("Converted string: %s\n", out);
    } else {
        printf("Conversion failed.\n");
    }

    return 0;
}