Adds strclr()

src/string.asm

@@ -4,6 +4,7 @@ section .text
 	global	strlen
 	global	strcpy
 	global	strcat
+	global	strclr
 
 ;----- strlen(*str[]) -----;
 ; Gets the length of given string
@@ -85,3 +86,19 @@ strcat:
 	mov	byte [rdi], EOS
 	mov	rax, r8
 	ret
+
+;----- strclr(*str[], maxLength) -----;
+; Clears a string by placing [maxLength] EOS into string.
+; Thus DANGEROUS function: MAKE SURE maxLength IS SIZE OF str[] - greater values WILL cause issues and eventually crashes
+; Return value: N/A
+; Used registers:
+;	rdi*	(arg) Pointer to str[]
+;	rsi	(arg) Length of str[]
+;	rcx*	Counter for STOSB
+;	rax*	Character storage (AL) for STOSB
+strclr:
+	mov	rcx, rsi
+	xor	al, al
+	cld
+	rep	stosb
+	ret