可疑的指针到指针转换(面积太小) [英] Suspicious pointer-to-pointer conversion (area too small)

问题描述

我收到此警告是出于我的逻辑-

I am getting this warning for my logic -

逻辑:

uint8_t     *m_data;

uint32_t* datap = (uint32_t*)m_data;

警告:

Info 826: Suspicious pointer-to-pointer conversion (area too small)

由于需要在赋值期间进行类型转换..而且我没有感觉到给定代码行中有问题..我如何抑制此警告或将其从构建中删除

As it is required to typecast the value during assignment ..And i am not feeling there is something wrong in given line of code ..how I can suppress this warning or remove it from build

推荐答案

这不是正确的强制转换，您试图将指向某个字节的指针解释为指向4个字节的指针，并可能导致意外结果.如果uint32_t与uint8_t具有不同的对齐要求，则您甚至可能获得不同的指针值以及指向的指针.如果要转换值，请执行以下操作:

That's not a correct cast, you're attempting to interpret a pointer to a byte as a pointer to 4 bytes, and can lead to unexpected results. If uint32_t has different alignment requirements than uint8_t, you might even get a different value of the pointer, and also what it points to. If you want to convert the value, just do:

uint32_t datap;
datap = static_cast<uint32_t>(*m_data);

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