problem while using typedef

[kabubu]

Hi,

I try to use typedef to structure my code better. While using this i came across the problem that i had to use a Function that deals with pointers,
but I want to use my typedeffed Type. Here is my Code:

typedef unsigned char tSha1Hash[20];
fillvalues(unsigned char *wert); // function supplied by the operationg system

void foo(tSha1Hash *outHashValue) {
unsigned char xywerte[3000];
fillValues(xywerte);
// return the values:
for(unsigned int i = 0; i < SHA1_SIZE; i++)
outHashValue[i]=md_value[i];
}


During the Assignment i get the Error:

error: incompatible types in assignment of âunsigned charâ to âunsigned char[20]â


Do i need to use type-casting? I tried some combinations that seemed logical, but none of them worked.

[jsmith]

Did you intend to pass a pointer to a Sha1Hash or just a Sha1Hash to your foo() function?
Currently you are passing a pointer. To fix, don't pass a pointer to it.

[kabubu]

Hello jsmith,

the outHashValue is the result of my foo() function.
The outHashValue is a 20 Byte Array, preinitialized by the caller. That Array is filled by foo()

So I think i have to pass a Pointer, don´t I ?

[mackabee]

void foo(tSha1Hash outHashValue) is passing a pointer.