add: ft_read

include/libasm.h

@@ -7,4 +7,5 @@ char *ft_strcpy(char *dest, const char *src);
 size_t ft_strlen(const char *str);
 int ft_strcmp( const char *first, const char *second);
 ssize_t ft_write(int fd, const void *buf, size_t count);
-char *ft_strdup(const char *s);
+char *ft_strdup(const char *s);
+ssize_t ft_read(int fildes, void *buf, size_t nbyte);

src/ft_read.asm

@@ -0,0 +1,25 @@
+extern __errno_location 
+
+section .text
+    global ft_read
+    ft_read:
+
+        xor rax, rax
+    
+        syscall
+    
+        cmp rax, 0
+        jne syscall_failed
+    
+        ret
+    
+    syscall_failed:
+        
+        neg rax
+        mov rbx, rax
+        
+        call __errno_location wrt ..plt
+
+        mov [rax], rbx
+        mov rax, -1
+        ret