Added tester and commentary to asm files

.gitignore

@@ -1,4 +1,5 @@
 *.o
 *.out
 *.a
-*.c
+*.c
+.vscode/*

Makefile

@@ -6,7 +6,7 @@
 #    By: vvaas <vvaas@student.42angouleme.fr>       +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2024/03/15 14:16:21 by vvaas             #+#    #+#              #
-#    Updated: 2024/05/23 14:42:18 by vvaas            ###   ########.fr        #
+#    Updated: 2024/06/23 19:55:39 by vvaas            ###   ########.fr        #
 #                                                                              #
 #******************************************************************************#
 
@@ -27,7 +27,7 @@ FLAGS = -f elf64
 
 AR = ar
 
-ARFLAG = rc
+ARFLAG = rcs
 
 .s.o :
 	@printf "\e[1;32m[compiling {"$(CC)"}...]\e[1;00m "$<"\n"

ft_read.s

@@ -2,16 +2,16 @@ global ft_read
 extern __errno_location
 
 ft_read:
-	mov eax, 0
+	mov eax, 0 ; move the syscall code of write (0) into eax (syscall register)
 	syscall
-	test rax, rax
-	js .error
-	ret
+	test rax, rax ; check if the syscall failed
+	js .error ; if the syscall failed, jump at .error
+	ret ; else return
 
 .error:
-	mov rdx, rax
-	call __errno_location wrt ..plt
-	neg rdx
-	mov [rax], rdx
-	mov rax, -1
-	ret
+	mov rdx, rax ; save rax (return value) into rdx as a temp value
+	call __errno_location wrt ..plt ; call errno_location (put errno pointer into rax) | wrt ..plt means the address of the function will be defined at runtime (needed for libc)
+	neg rdx ; invert the return value
+	mov [rax], rdx ; *errno_value = rdx
+	mov rax, -1 ; set the return value to -1
+	ret ; return

ft_strcpy.s

@@ -12,6 +12,6 @@ ft_strcpy:
 	jmp .cpy
 
 .end:
-	mov byte [rdi + rdx], 0
-	mov rax, rdi
-	ret
+	mov byte [rdi + rdx], 0 ; dest[rdx] = '\0'
+	mov rax, rdi ; set dest as the return value
+	ret ; return

ft_write.s

@@ -23,4 +23,4 @@ ft_write:
 	neg rdx       ; we neg the syscall return value to put it in errno
 	mov [rax], rdx ; *errno_location = value
 	mov rax, -1    ; we return -1
-	ret
+	ret