typedefining the BOOL as unsigned char

Hi can anyone please tell me how can i typedef the BOOL to unsigned char , if it is defined , but if we havt define the BOOL as unsigned char then it has to take the defualt bool (windows BOOL).


[code]:

#if defined BOOL

typedef unsigned char BOOL


#elif

----


[code]


I want the codes here plz help me.

Code:

---

#ifndef BOOL
typedef unsigned char BOOL;
#endif

---

You should get Windows' BOOL if you include any of Windows-specific headers.

Edit: Missing semicolon, duh.

Thanks for your help. but my requirement is like this :

if i define BOOL as unsigned char then i have to use the same all over the programme , if BOOL is not defined as unsigned char then it has to take the defualt windows BOOL.

Looking forward for the replay.

Quote:

---

Originally Posted by ushacy

Thanks for your help. but my requirement is like this :

if i define BOOL as unsigned char then i have to use the same all over the programme , if BOOL is not defined as unsigned char then it has to take the defualt windows BOOL.

Looking forward for the replay.

---

First... you will regret this. You will run into all kinds of type definition errors... it won't use the windows version intellegently, it will simply tell you that you have redefined the type, error off and stop compiling.

Windows BOOL type is an integer for a reason... you are testing for 0 vs !0 but some windows functions can and do return large numbers for the !0 case. (Registry functions are notorious for this)

That said...

Code:

---

#ifndef _BOOL
typedef unsigned char BOOL;
#define _BOOL
#endif

---

Also: processors evaluate ints faster than 1 byte chars, because they do not load single bytes, they load multiples of 4. And because of paging any apparent memory saving is going to be illusory. So there is no advantage to using an unsigned char, but potentially some disadvantages.

If you have a choice, use an int or unsigned int. Unsigned char is just silly.

@MK27 ... one for the history books, my friend... Looks like we actually agree on something! :D

Ya you are right ,, if i try to change the type of windows data types it will through a erro but here my requirement is like this ... i have to redefine the windows data type to my own definition as BOOL to unsigned char and i have to use this all over the programme.


i have tried your way of doing :

Code:

#ifdef

_BOOL

typedef

unsignedchar BOOL;

#define

_BOOL

#endif [code]

but its is throuing an error and it s not redefining please help me in this issue.

Thanks in advance

[QUOTE=ushacy;1069661]Ya you are right ,, if i try to change the type of windows data types it will through a erro but here my requirement is like this ... i have to redefine the windows data type to my own definition as BOOL to unsigned char and i have to use this all over the programme.


i have tried your way of doing :

Code:

#ifndef

_BOOL

typedef

unsigned char BOOL;

#define

_BOOL

#endif [code]

but its is throuing an error and it s not redefining please help me in this issue.

Thanks in advance

It's what I told you in the first message... you can't do that...

Windows defines it's own BOOL type... just use it.


The only thing you can do is define a secondary type...

Code:

---

#ifndef _CBOOL
typedef unsigned char cBOOL;
#define _CBOOL
#endif

---

And no you cannot put in line breaks like you did in message #8, that will cause it's own set of errors.