utf-8与gbk编码转换

最新推荐文章于 2025-11-08 11:29:28 发布

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本文提供了一个使用C语言进行字符集转换的代码示例，主要展示了如何利用iconv库函数实现UTF-8到GB2312及反之的编码转换。通过具体的函数定义和main函数中的操作流程，读者可以了解到字符集转换的基本方法。

#include <iconv.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>

int code_convert(char *from_charset, char *to_charset, char *inbuf, size_t inlen,
                char *outbuf, size_t outlen) {
        iconv_t cd;
        char **pin = &inbuf;
        char **pout = &outbuf;

        cd = iconv_open(to_charset, from_charset);
        if (cd == 0)
                return -1;
        memset(outbuf, 0, outlen);
        if (iconv(cd, pin, &inlen, pout, &outlen) == -1)
                return -1;
        iconv_close(cd);
        *pout = '\0';

        return 0;
}

int u2g(char *inbuf, size_t inlen, char *outbuf, size_t outlen) {
        return code_convert("utf-8", "gb2312", inbuf, inlen, outbuf, outlen);
}

int g2u(char *inbuf, size_t inlen, char *outbuf, size_t outlen) {
        return code_convert("gb2312", "utf-8", inbuf, inlen, outbuf, outlen);
}

int main(void) {
        char *s = "中国";
        int fd = open("test.txt", O_RDWR|O_CREAT, S_IRUSR | S_IWUSR);
        char buf[10];
        u2g(s, strlen(s), buf, sizeof(buf));
        write(fd, buf, strlen(buf));
        close(fd);

        fd = open("test.txt2", O_RDWR|O_CREAT, S_IRUSR | S_IWUSR);
        char buf2[10];
        g2u(buf, strlen(buf), buf2, sizeof(buf2));
        write(fd, buf2, strlen(buf2));
        close(fd);
        return 1;
}