Updated lib label scopes and continued to lesson 18

lib/fl.asm

@@ -1,3 +1,46 @@
+
+;------------------------------------------
+; int atoi(Integer number)
+; Ascii to integer function (atoi)
+atoi:
+push	ebx
+push	ecx
+push	edx
+push	esi
+mov	esi, eax
+mov	eax, 0
+mov	ecx, 0
+
+.multiplyLoop:
+xor	ebx, ebx
+mov	bl, [esi+ecx]
+cmp	bl, 48
+jl	.finished
+cmp	bl, 57
+jg	.finished
+
+sub	bl, 48
+add	eax, ebx
+mov	ebx, 10
+mul	ebx
+inc	ecx
+jmp	.multiplyLoop
+
+.finished:
+cmp	ecx, 0
+je	.restore
+mov	ebx, 10
+div	ebx
+
+.restore:
+pop	esi
+pop	edx
+pop	ecx
+pop	ebx
+ret
+
+
+
 ;------------------------------------------
 ; void iprint(Integer number)
 ; Integer printing function (itoa)
@@ -8,7 +51,7 @@ push	edx
 push	esi
 mov	ecx, 0
 
-divideLoop:
+.divideLoop:
 inc	ecx
 mov	edx, 0
 mov	esi, 10
@@ -16,15 +59,15 @@ idiv	esi
 add	edx, 48
 push	edx
 cmp	eax, 0
-jnz	divideLoop
+jnz	.divideLoop
 
-printLoop:
+.printLoop:
 dec	ecx
 mov	eax, esp
 call	sprint
 pop	eax
 cmp	ecx, 0
-jnz	printLoop
+jnz	.printLoop
 
 pop	esi
 pop	edx
@@ -58,13 +101,13 @@ slen:
 push    ebx
 mov     ebx, eax
 
-nextchar:
+.nextchar:
 cmp     byte [eax], 0
-jz      finished
+jz      .finished
 inc     eax
-jmp     nextchar
+jmp     .nextchar
 
-finished:
+.finished:
 sub     eax, ebx
 pop     ebx
 ret
@@ -109,7 +152,7 @@ push    eax
 mov     eax, esp
 call    sprint
 pop     eax
-pop eax
+pop	eax
 ret