125 lines
1.5 KiB
NASM
125 lines
1.5 KiB
NASM
;------------------------------------------
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; void iprint(Integer number)
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; Integer printing function (itoa)
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iprint:
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push eax
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push ecx
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push edx
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push esi
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mov ecx, 0
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divideLoop:
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inc ecx
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mov edx, 0
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mov esi, 10
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idiv esi
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add edx, 48
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push edx
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cmp eax, 0
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jnz divideLoop
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printLoop:
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dec ecx
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mov eax, esp
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call sprint
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pop eax
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cmp ecx, 0
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jnz printLoop
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pop esi
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pop edx
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pop ecx
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pop eax
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ret
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;------------------------------------------
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; void iprintLF(Integer number)
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; Integer printing function with linefeed (itoa)
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iprintLF:
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call iprint
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push eax
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mov eax, 0Ah
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push eax
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mov eax, esp
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call sprint
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pop eax
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pop eax
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ret
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;------------------------------------------
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; int slen(String message)
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; String length calculation function
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slen:
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push ebx
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mov ebx, eax
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nextchar:
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cmp byte [eax], 0
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jz finished
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inc eax
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jmp nextchar
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finished:
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sub eax, ebx
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pop ebx
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ret
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;------------------------------------------
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; void sprint(String message)
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; String printing function
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sprint:
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push edx
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push ecx
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push ebx
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push eax
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call slen
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mov edx, eax
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pop eax
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mov ecx, eax
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mov ebx, 1
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mov eax, 4
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int 80h
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pop ebx
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pop ecx
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pop edx
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ret
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;------------------------------------------
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; void sprintLF(String message)
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; String printing with line feed function
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sprintLF:
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call sprint
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push eax
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mov eax, 0Ah
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push eax
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mov eax, esp
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call sprint
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pop eax
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pop eax
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ret
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;------------------------------------------
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; void exit()
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; Exit program and restore resources
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quit:
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mov ebx, 0
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mov eax, 1
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int 80h
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ret
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