add other basic functions and test with them

srcs/ft_read.s

@@ -0,0 +1,19 @@
+global ft_read
+extern __errno_location
+section .text
+
+ft_read:
+	mov rax, 0 ;syscall number for read, args are already set at the right place
+	syscall
+
+	cmp rax, 0 ; if return is < 0, it's an error in negative
+	jg success
+
+	neg rax ; inv errno, and set errno
+	mov edi, eax
+	call __errno_location wrt ..plt
+	mov [rax], edi
+	mov rax, -1
+
+success:
+	ret

srcs/ft_strcmp.s

@@ -0,0 +1,48 @@
+section .text
+	global ft_strcmp
+
+ft_strcmp:
+	xor rax, rax
+
+	test rdi, rdi ; test if args are false
+	je err
+	test rsi, rsi
+	je err
+loop_start:
+	mov al, [rdi]
+	cmp al, [rsi]
+	jne compare 
+
+	test al, al ; test if rdi is \0
+	je compare
+
+	mov al, [rsi] ; test if rsi is \0
+	test al, al
+	je compare 
+
+	lea rsi, [rsi + 1]
+	lea rdi, [rdi + 1]
+	jmp loop_start
+
+
+compare:
+	mov al, [rdi]
+	cmp al, [rsi]
+	jl lower
+	jg greater
+	mov eax, 0
+	jmp end
+
+lower:
+	mov eax, -1
+	jmp end
+
+greater:
+	mov eax, 1
+	jmp end
+
+err:
+	mov eax, 0
+
+end:
+	ret

srcs/ft_strcpy.s

@@ -0,0 +1,29 @@
+section .text
+	global ft_strcpy
+
+ft_strcpy:
+	test rdi, rdi
+	je err
+	test rsi, rsi
+	je err
+	push rdi
+	jmp loop_start
+condition_check:
+	mov al, [rdi]
+	test al, al
+	je end
+
+loop_start:
+	mov rax, [rsi]
+	mov [rdi], rax
+	lea rdi, [rdi + 1]
+	lea rsi, [rsi + 1]
+	jmp condition_check
+	
+end:
+	pop rax
+	ret
+
+err:
+	xor rax, rax
+	ret

srcs/ft_strdup.s

@@ -0,0 +1,31 @@
+extern malloc
+global ft_strdup
+extern ft_strcpy
+extern ft_strlen
+extern __errno_location
+section .text
+
+ft_strdup:
+	test rdi, rdi ; test if arg is NULL
+	je err
+
+	push rdi ;push to use it for the strcpy
+	call ft_strlen
+	mov rdi, rax
+
+	call malloc wrt ..plt
+	test rax, rax
+	je malloc_failed
+	mov rdi, rax
+	pop rsi
+	call ft_strcpy
+	ret
+
+malloc_failed:
+	call __errno_location wrt ..plt
+	mov dword [rax], 12
+	pop rax
+
+err:
+	xor rax, rax
+	ret

srcs/ft_write.s

@@ -0,0 +1,20 @@
+global ft_write
+extern __errno_location
+section .text
+
+ft_write:
+	mov rax, 1 ;syscall number for write, args are already set at the right place
+	syscall
+
+	cmp rax, 0 ; if return is < 0, it's an error in negative
+	jg success
+
+	neg rax ; inv errno, and set errno
+	mov edi, eax
+	call __errno_location wrt ..plt
+	mov [rax], edi
+	mov rax, -1
+
+
+success:
+	ret