1 files changed, 12 insertions, 0 deletions
diff --git a/ft_read.s b/ft_read.s
index 00718e8..564f2fc 100644
--- a/ft_read.s
+++ b/ft_read.s
@@ -14,6 +14,18 @@ global _ft_read
 
 ; int ft_read(int, void*, size_t);
 _ft_read:
+	cmp rdx, 0
+	je  FT_READ_NO_SIZE
+	cmp rdi, 0
+	jl  FT_READ_ERROR
+	cmp rsi, 0
+	je  FT_READ_ERROR
 	mov rax, 0x2000003
 	syscall
 	ret
+FT_READ_ERROR:
+	mov rax, -1
+	ret
+FT_READ_NO_SIZE:
+	xor rax, rax
+	ret