当前位置: 技术问答>linux和unix
linux c/c++一个关于gb2312转gbk的问题
来源: 互联网 发布时间:2017-03-02
本文导语: ret = iconv(ct, &inbuf, &inbuf_sz, &otbuf, &otbuf_sz); 转化前inbuf is “测试”,inbuf_sz = strlen(inbuf);inbuf_sz此时大小为 4; 转化后outbuf is “测”; ret = -1;errno == EINVAL;inbuf_sz = 1;转化失败; 但是如果我把inbuf_sz ...
ret = iconv(ct, &inbuf, &inbuf_sz, &otbuf, &otbuf_sz);
转化前inbuf is “测试”,inbuf_sz = strlen(inbuf);inbuf_sz此时大小为 4;
转化后outbuf is “测”;
ret = -1;errno == EINVAL;inbuf_sz = 1;转化失败;
但是如果我把inbuf_sz = strlen(inbuf)+1,则转化成功;
我把inbuf改成“测试1”后,同样能转化成功;跪求大神解释,和处理方法
转化前inbuf is “测试”,inbuf_sz = strlen(inbuf);inbuf_sz此时大小为 4;
转化后outbuf is “测”;
ret = -1;errno == EINVAL;inbuf_sz = 1;转化失败;
但是如果我把inbuf_sz = strlen(inbuf)+1,则转化成功;
我把inbuf改成“测试1”后,同样能转化成功;跪求大神解释,和处理方法
|
iconv_t iconv_open(const char *tocode, const char *fromcode);
size_ticonv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
int iconv_close(iconv_t cd);
iconv_open函数用来打开一个编码转换的流,iconv函数的作用是实际进行转换,iconv_close函数的作用就是关闭这个流。实际用法参见下面的例子,下面是一个将UTF-8码转换成GBK码的例子,我们假设已经有了一个uft8编码的输入缓冲区inbuf以及这个缓冲区的长度inlen。
iconv_t cd = iconv_open( "GBK", "UTF-8");
char *outbuf = (char *)malloc(inlen * 4 );
bzero( outbiuf, inlen * 4);
char *in = inbuf;
char *out = outbuf;
size_t outlen = inlen *4;
iconv(cd, &in, (size_t *)&inlen, &out,&outlen);
outlen = strlen(outbuf);
printf("%sn",outbuf);
free(outbuf);
iconv_close(cd);
非常值得注意的地方是:iconv函数会修改参数in和参数out指针所指向的地方,也就是说,在调用iconv函数之前,我们的in和inbuf指针以及out和outbuf指针指向的是同一块内存区域,但是调用之后out指针所指向的地方就不是outbuf了,同理in指针。所以要
char *in = inbuf;
char *out = outbuf;
另存一下,使用或者释放内存的时候也要使用原先的那个指针outbuf和inbuf。
|
#include
#include
int main(void)
{
char inbuf[] = "解决方法很简单";
char outbuf[32];
int ret;
size_t inlen = strlen(inbuf);
iconv_t cd = iconv_open("GBK", "UTF-8");
char *in = inbuf;
size_t inl = inlen;
char *out = outbuf;
size_t outl = 32;
ret = iconv(cd, &in, &inl, &out, &outl);
iconv_close(cd);
if (ret gb2312 > gbk
|
楼主估计是不懂编码, 你能确认你之前的编码就是gbk?