made case use length_func

CMakeLists.txt

@@ -20,4 +20,4 @@ add_link_options(-fno-pie -m64 -no-pie -pedantic-errors)
 add_executable(length length.asm)
 add_executable(yes yes.asm)
 add_executable(case case.asm)
-
+add_executable(diff diff.asm)

case.asm

@@ -1,14 +1,19 @@
 extern puts
 
+%include "../inc/length_func.inc"
+
 section .data
 	text db "rEEEeee!EEeeeEeEEeE!EEEEEeEEE$eeeEE)EEeEeEEeeeEeEEEEEeeeEeeEeeEeeeeeEeEeEeeE",0
-	textlength db 76
+	textlength db 0
 section .text
 	global main
 
 main:
 	sub rsp, 8	;enter
 
+	mov r8, text 	;get textlength
+	call length_func
+	mov [textlength], rax
 
 
 	xor rcx, rcx	;we do this to clear rcx incase it had garbage in it before

diff.asm

@@ -0,0 +1,84 @@
+extern puts
+%include "../inc/length_func.inc"
+
+
+
+
+
+section .data
+	text db "REEEEEEEEEE",0
+	text2 db "REEEEEEErEE",0
+	differ db "they differ",0
+	notdiffer db "they do not differ",0
+	textlength dq 0
+	text2length dq 0
+section .text
+	global main
+
+main:
+	sub rsp, 8	;enter
+
+
+;below we are getting the length of each string
+;we do this because we dont want to compare with memory that isnt ours
+
+	mov r8, text
+	call length_func
+	mov [textlength], rax
+
+	mov r8, text2
+	call length_func
+	mov [text2length], rax
+
+	mov r8, [textlength]
+	mov r9, [text2length]
+
+	cmp r8, r9
+	jne _differ
+
+
+
+	xor rcx, rcx	;we do this to clear garbage in rcx (i have had garbage in it before)
+_loop:
+;loop tings
+
+	mov r8, text
+	add r8, rcx
+
+	mov r9, text2
+	add r9, rcx
+
+	mov r10b, [r8]
+	mov r11b, [r9]
+
+
+
+	cmp r10b, r11b
+	jne _differ
+	cmp r10b, 0
+	je _notdiffer
+	cmp r11b, 0
+	je _notdiffer
+	
+	
+		
+	inc rcx
+	jmp _loop
+
+
+
+	
+_differ:
+    	mov rdi, differ
+    	cld
+    	call puts
+    	jmp _end
+
+_notdiffer:
+	mov rdi, notdiffer
+	cld
+	call puts
+
+_end:
+	add rsp, 8	;exit
+	ret

inc/length_func.inc

@@ -1,9 +1,9 @@
 
 length_func:
 
+	mov r10, r8
 _loop67865432:
 
-
 	mov r9b, [r8]
 	cmp r9b, 0
 	jz _exitloop4323567
@@ -11,11 +11,7 @@ _loop67865432:
 
 	jmp _loop67865432
 _exitloop4323567:
-	dec r8		; idk how to do it properly do im doing this instead
-
-	dec r8
-	dec r8
-	dec r8
 
+	sub r8, r10
 	mov rax, r8
 	ret

length.asm

@@ -1,16 +1,17 @@
 extern puts
 extern printf
 default rel
-%include "../length_func.inc"
+%include "../inc/length_func.inc"
 
 
 
 
 section .rodata
-	format db "%#x", 10, 0
+	format db "%#d", 10, 0
 
 section .data
-	text db "rEEEeee!EEeeeEeEEeE!EEEEEeEEE$eeeEE)EEeEeEEeeeEeEEEEEeeeEeeEeeEeeeeeEeEeEeeE",0
+	text db "rEE",0
+	testasd dq 0
 section .text
 	global main
 
@@ -21,22 +22,16 @@ main:
 
 	mov r8, text
 	call length_func
+	mov [testasd], rax
 
 
-
+	mov   rsi, [testasd]
-	mov rdi, text
-	cld
-	call puts	;this is the puts way of printing a string
-
-
-	mov   rsi, r8
 	lea   rdi, [rel format]
 	xor   eax, eax		   ; AL=0  no FP args in XMM regs
 	call  printf
 
 
 
-
 _end:
 	add rsp, 8	;exit
 	ret