如何将*_Ctype_char转换为*_Ctype_uchar
如何将*_Ctype_char转换为*_Ctype_uchar
提问于 2019-07-10 02:34:10
我使用cgo调用动态库中的一个函数，其签名如下所示：
int decompress(int, const uint8_t *, size_t, uint8_t *, size_t);下面是我的go代码：
// #include statements here
import "C"
import (
"unsafe"
)
func Decompress(comp_type int, data string, expected_size int) []byte {
compressedData := C.CString(data)
defer C.free(unsafe.Pointer(compressedData))
compressedDataSize := C.ulong(len(data))
decompressedData := C.malloc(C.ulong(C.sizeof_char * expected_size))
defer C.free(unsafe.Pointer(decompressedData))
decompressedDataSize := C.ulong(expected_size)
ret_val := C.XpressDecompress(C.int(comp_type),
(*C.uchar) (compressedData),
compressedDataSize,
(*C.uchar) (decompressedData),
&decompressedDataSize)
decompressed := C.GoBytes(decompressedData, C.int(decompressedDataSize))
return decompressed
}然而，当我尝试构建时，我得到了这个错误：cannot convert compressedData (type *_Ctype_char) to type *_Ctype_uchar
将输入字符串转换为const unsigned char*的最佳方法是什么
回答 1
Stack Overflow用户
发布于 2019-07-10 03:08:42
以下方法起作用了：
compressedData := unsafe.Pointer(data)和
(*C.uchar) (compressedData)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/56958728
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