Question

我正在使用cgo来调用动态库中一个签名如下的函数：

int decompress(int, const uint8_t *, size_t, uint8_t *, size_t);

这是我的转到代码：

// #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
}

但是，尝试构建时出现此错误： 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？

Answer 1

以下工作有效：

compressedData := unsafe.Pointer(data)

和

(*C.uchar) (compressedData)

如何将* _Ctype_char转换为* _Ctype_uchar

1 个答案: