Implementation of C String

/*
* String. c
*
* Created on: 2012-12-4
* Author: Administrator
*/
# Include <stdio. h>
# Include <stdlib. h>
# Define TRUE 1
# Define FALSE 0
# Define CHECK (t) do {if (! (T) return 0;} while (0)
Typedef char * String;
Typedef int Status;
Static String STRBUFFER = 0;
Int StrLen (String buf ){
String temp = buf;
While (* temp ++ );
Return temp-buf-1;
}
String StrMake (int length ){
Return (String) malloc (length + 1 );
}
String StrChr (String buf, char ch, int length ){
While (length -- & * buf ++! = Ch );
Return buf-1;
}
Void StrCat (String * dest, String src ){
String temp = (String) malloc (StrLen (* dest) + StrLen (src) + 1 );
String head = temp;
String d = * dest;
While (* d ){
* Temp ++ = * d ++;
}
While (* src ){
* Temp ++ = * src ++;
};
* Temp = '\ 0 ';
* Dest = head;
}
Int StrCmp (String buf1, String buf2 ){
Do {
If (* buf1> * buf2) return 1;
If (* buf1 <* buf2) return-1;
If (! * Buf1) break;
Buf1 ++;
Buf2 ++;
} While (1 );
Return 0;
}
Void StrCpy (String * dest, String src ){
* Dest = StrMake (StrLen (src ));
String temp = * dest;
While (* src ){
* Temp ++ = * src ++;
}
* Temp = 0;
}
Void StrFree (String * str ){
Free (* str );
* Str = 0;
}

Status StrPrint (String str ){
CHECK (str );
Puts (str );
Return TRUE;
}
String StrTok (String dest, String src ){
If (dest) StrCpy (& STRBUFFER, dest );
CHECK (src & STRBUFFER & * STRBUFFER );
Int length = StrLen (src );
String ch = StrChr (src, * STRBUFFER, length );
If (* ch = * STRBUFFER ){
Do {
* STRBUFFER ++ = '\ 0 ';
CHECK (* STRBUFFER );
Ch = StrChr (src, * STRBUFFER, length );
} While (* ch = * STRBUFFER );
}
String result = STRBUFFER;
String temp = result;
While (* temp ){
Ch = StrChr (src, * temp, length );
If (* ch = * temp ){
* Temp ++ = '\ 0 ';
CHECK (* temp );
Break;
} Else {
Temp ++;
}
}
STRBUFFER = temp;
Return result & * result? Result: 0;
}
String StrStr (String dest, String src ){
CHECK (dest & src & * dest & * src );
Do {
String temp = src, rt = dest;
While (* temp = * rt ){
Temp ++; rt ++;
}
If (! * Temp) return dest;
CHECK (* rt );
Dest ++;
} While (* dest );
Return 0;
}