.386p
locals

public  STRCHR

_TEXT           segment byte public use32 'CODE'
assume  cs:_TEXT

STRCHR:
        push edi
        cld

        mov edi,[esp+4+4+04h]
        mov edx,edi
        or ecx,-1
        xor al,al
        repne scasb
        not ecx

        mov edi,edx
        mov al,[esp+4+4+00h]
        repne scasb
        jne short @@01

        lea eax,[edi-1]
        jmp short @@00

@@01:
        xor eax,eax

@@00:
        pop edi
        ret 08h

_TEXT           ends
end