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c – 方便地将std :: vector复制到输入流(std :: istream)对象

 5 years ago
source link: https://codeday.me/bug/20190112/518588.html?amp%3Butm_medium=referral
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我正在尝试使用第三方库中的函数,并期望输入流对象,其中传输二进制文件数据.

签名看起来像这样：

doSomething(const std::string& ...,
          const std::string& ...,
          std::istream& aData,
          const std::string& ...,
          const std::map<std::string, std::string>* ...,
          long ...,
          bool ...);

由于我无法更改/更改此第三方库/功能,因此我必须适应“我的”代码.在调用的地方,我有一个std :: vector,它包含了预期在istream对象中传递的数据.目前,我将矢量复制到流中,通过迭代并使用< JR 运算符逐字节复制> 

vector<unsigned char> values;
// ...

stringstream ioss;    
copy(values.begin(), values.end(),
     ostream_iterator<unsigned char>(ioss,","));

// doSomething(a, b, ioss, d, e, f, g);

翻译自：https://stackoverflow.com/questions/9358255/conveniently-copy-stdvectorunsigned-char-to-input-stream-stdistream-obje


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