From 048a43083ab59b05f5139f0e21617a08a22550bf Mon Sep 17 00:00:00 2001
From: zombie <zombie@qtechofficial.com>
Date: Mon, 4 Oct 2021 16:34:02 -0400
Subject: [PATCH] remade atoi it no longer nukes your string

---
 atoi.asm        | 89 +++++++++++++++----------------------------------
 atoi_legacy.asm | 88 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 114 insertions(+), 63 deletions(-)
 create mode 100644 atoi_legacy.asm

diff --git a/atoi.asm b/atoi.asm
index e9db137..7364e7b 100644
--- a/atoi.asm
+++ b/atoi.asm
@@ -6,83 +6,46 @@ section .text
 
 libz_atoi:
 
-	mov r8, rdi
 
-	xor r9, r9
-
-_loopasd23:
-
-	mov r9b, [r8]
-	
-	cmp r9, 0 	;check and see if we have reached the end of the string
-	jz _exitloopasd12
-
-	sub r9, 48
-
-	mov [r8], r9b
-	inc r8
-	jmp _loopasd23
-
-_exitloopasd12:
-
-	
+;	mov r11, rdi	;saveing it for later
 
+	push rdi
 	call libz_strlen
-	mov r8, rax
-	mov r11, rax
-	
-	add r8, rdi
-
-	dec r8
-	push r8
-	inc r8
+	mov r9, rax
+	pop rdi
 
+	xor r10, r10
 
 	mov rcx, 1
-_loop2asd12:
-	dec r8
-	mov al, [r8]
+	add r9, rdi
+	dec r9
+
+_loop:
+
+	xor rax, rax
+	mov al, [r9]
 
 
+;	push rax
+	sub rax, 48
 	mul rcx
-	mov [r8], al
+	add r10, rax
+;	pop rax
 
-	
-	mov rax, rcx
-	mov r10, 10
-	mul r10
+	cmp r9, rdi
+	je _end
+	dec r9
+;	push rax
+	mov rax, 10
+	mul rcx
 	mov rcx, rax
-	
-	cmp r8, rdi
-	je _exitloop2asd12
-	jmp _loop2asd12
-_exitloop2asd12:
+;	pop rax
 
-	mov r8, rdi
-	mov r9, rdi
-	inc r9
-
-_loop3asd12:
-
-	mov r11b, [r9]
-	mov r10b, [r8]
-	cmp r11, 0
-	jz _endasdasd23123
-
-	add r11, r10
-
-	mov [r9], r11b
-	mov [r8], r10b
+	jmp _loop
 
 
-	inc r8
-	inc r9
 
-	jmp _loop3asd12
-
-	
-_endasdasd23123:
-	pop r8
-    	mov rax, [r8]
+_end:
+	mov rax, r10
 	ret
 	
diff --git a/atoi_legacy.asm b/atoi_legacy.asm
new file mode 100644
index 0000000..e9db137
--- /dev/null
+++ b/atoi_legacy.asm
@@ -0,0 +1,88 @@
+extern libz_strlen
+
+global libz_atoi
+
+section .text
+
+libz_atoi:
+
+	mov r8, rdi
+
+	xor r9, r9
+
+_loopasd23:
+
+	mov r9b, [r8]
+	
+	cmp r9, 0 	;check and see if we have reached the end of the string
+	jz _exitloopasd12
+
+	sub r9, 48
+
+	mov [r8], r9b
+	inc r8
+	jmp _loopasd23
+
+_exitloopasd12:
+
+	
+
+	call libz_strlen
+	mov r8, rax
+	mov r11, rax
+	
+	add r8, rdi
+
+	dec r8
+	push r8
+	inc r8
+
+
+	mov rcx, 1
+_loop2asd12:
+	dec r8
+	mov al, [r8]
+
+
+	mul rcx
+	mov [r8], al
+
+	
+	mov rax, rcx
+	mov r10, 10
+	mul r10
+	mov rcx, rax
+	
+	cmp r8, rdi
+	je _exitloop2asd12
+	jmp _loop2asd12
+_exitloop2asd12:
+
+	mov r8, rdi
+	mov r9, rdi
+	inc r9
+
+_loop3asd12:
+
+	mov r11b, [r9]
+	mov r10b, [r8]
+	cmp r11, 0
+	jz _endasdasd23123
+
+	add r11, r10
+
+	mov [r9], r11b
+	mov [r8], r10b
+
+
+	inc r8
+	inc r9
+
+	jmp _loop3asd12
+
+	
+_endasdasd23123:
+	pop r8
+    	mov rax, [r8]
+	ret
+