So I have an
unsigned char * pMyPtr
assigned to something.
Then I want to compare this to an arbitrary string with
strcmp(const char* , const char* )
But when I do that, clang compiler tells me
warning: passing (aka 'unsigned char *') to parameter of type 'const char *' converts between pointers to integer types with different sign
How do I remove this warning?
With all the comments to the question, I feel like I'm missing something.
I know that casts are unfashionable, but isn't the following a simple workaround?
strcmp((const char*) pMyPtr , whatever_is_being_compared)
It isn't even unsigned. Behind it, is a struct.
This means that you cannot use strcmp here. You can use strcmp when the input data are null-terminated strings. That's not the case when the input data are structs. Perhaps you should consider memcmp instead, or perhaps you need to compare the structs as structs.
Clang can't convert from unsigned char* to const char*.
That because unsigned char* is different then char*.
By adding unsiged you make the range of char 0to255 instead of -127to127.
On the line where strcmp goes, you can typecast the unsigned char value with (const char*) which will work, because there it will be threated as a const char*. instead of unsigned char
If you feel that warning does not have any side effect. you can ignore the warning like this:
#pragma warning( disable : 4507 34 )
