basic idea of ar

.vscode/launch.json

@@ -64,6 +64,22 @@
             "environment": [],
             "externalConsole": false,
             "MIMode": "gdb",
+            "osx": {
+                "MIMode": "lldb"
+            }
+		},
+		{
+            "name": "ar",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/debug_bld/ft_nm",
+            "args": ["${workspaceFolder}/debug_bld/subprojects/libft/libft.a"],
+            "preLaunchTask": "build",
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
             "osx": {
                 "MIMode": "lldb"
             }

src/ar.c

@@ -1,6 +1,31 @@
 #include "ft_nm.h"
+#include "libft.h"
+#include <ar.h>
+
 
 void	ar(t_nm_file *file)
 {
-	(void)file;
+	struct ar_hdr	*runner;
+	char			*long_name;
+	size_t			offset;
+	t_nm_file		obj;
+
+
+	runner = file->file + SARMAG;
+	while ((void *)runner < file->file + file->size)
+	{
+		if (ft_strncmp(runner->ar_name, AR_EFMT1, 3) == 0)
+		{
+			offset = ft_atoi(&runner->ar_name[3]);
+			long_name = (char *)runner + sizeof(struct ar_hdr);
+			ft_putstr("\n");
+			ft_putstr(long_name);
+			ft_putstr("\n");
+			obj.file = (void *)((size_t)runner + sizeof(struct ar_hdr) + offset);
+			obj.size = ft_atoi(runner->ar_size) - offset;
+			if (*(uint32_t *)obj.file == MH_MAGIC_64)
+				macho64(&obj);
+		}
+		runner = (struct ar_hdr *)((size_t)runner + ft_atoi(runner->ar_size) + sizeof(struct ar_hdr));
+	}
 }

src/main.c

@@ -6,7 +6,7 @@
 /*   By: gtertysh <gtertysh@student.unit.ua>        +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2019/07/13 14:52:27 by gtertysh          #+#    #+#             */
-/*   Updated: 2019/07/27 19:35:42 by gtertysh         ###   ########.fr       */
+/*   Updated: 2019/07/31 21:37:00 by gtertysh         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -19,6 +19,7 @@ void		hanldle_file(const char *filename)
 	t_nm_file	file;
 	uint32_t	magic;
 
+	// create dispatch table for this bullshit
 	init_file(&file);
 	open_file(filename, &file);
 	magic = *(uint32_t *)file.file;
@@ -28,6 +29,8 @@ void		hanldle_file(const char *filename)
 		macho32(&file);
 	else if (magic == FAT_CIGAM)
 		fat(&file);
+	else if (ft_strncmp(file.file, ARMAG, SARMAG) == 0)
+		ar(&file);
 	else
 		ft_putstr("invalid magic number.");
 	close_file(&file);