add lib9660 and test_iso9660 function

src/kernel/kernel.c

@@ -14,6 +14,7 @@
 #include "../include/kheap.h"
 #include "../include/exec_from_file.h"
 #include "../include/atapi.h"
+#include "../include/lib9660.h"
 
 #include <stdint.h>
 
@@ -24,6 +25,99 @@ void apply_pic_masks()
    	outb(0xa1,0xff);
 }
 
+static l9660_fs   g_iso_fs;
+static l9660_dir  g_root_dir;
+static l9660_file g_test_file;
+
+bool read_sector_callback(l9660_fs *fs, void *buf, uint32_t sector) {
+    // The 'fs' parameter is not needed for our simple case, so we can ignore it.
+    (void)fs;
+
+    // Call your existing CD-ROM read function to read 1 sector.
+    // We assume the CD-ROM is the secondary master (0x170).
+    int result = read_cdrom(0x170, false, sector, 1, (uint16_t*)buf);
+
+    // lib9660 expects 'true' for success and 'false' for failure.
+    // Your read_cdrom returns 0 for success.
+    return (result == 0);
+}
+
+void test_iso9660()
+{
+	l9660_status status = l9660_openfs(&g_iso_fs, read_sector_callback);
+
+    if (status != L9660_OK) {
+        printf("Error opening ISO9660 filesystem!\n");
+        return;
+    }
+
+    // 2. Open the root directory
+    status = l9660_fs_open_root(&g_root_dir, &g_iso_fs);
+    if (status != L9660_OK) {
+        printf("Error opening root directory!\n");
+        return;
+    }
+
+	printf("Files in root directory:\n");
+    for (;;) {
+        l9660_dirent *dent;
+        status = l9660_readdir(&g_root_dir, &dent);
+
+        if (dent == NULL || status != L9660_OK) {
+            break; // End of directory or error
+        }
+
+        // Print the filename. It's not null-terminated, so use the length field.
+        for (int i = 0; i < dent->name_len; ++i) {
+            printf("%c", dent->name[i]);
+        }
+        printf("\n");
+    }
+
+	printf("\nReading content of /TEST.TXT:\n");
+
+    // Re-open the root directory to reset its position before searching
+    l9660_fs_open_root(&g_root_dir, &g_iso_fs);
+
+    // Note: ISO9660 filenames are often uppercase.
+    status = l9660_openat(&g_test_file, &g_root_dir, "test.txt;1");
+
+	if (status != L9660_OK) {
+        printf("Error opening TEST.TXT;1. Error code: ");
+        printf("%X\n", status); // Print the error code
+        printf("\n");
+    } else {
+        char file_buffer[129];
+        size_t bytes_read;
+		uint32_t total_bytes;
+
+		for (;;) {
+            // Read the next chunk of the file
+            status = l9660_read(&g_test_file, file_buffer, 128, &bytes_read);
+
+            // Check for a read error
+            if (status != L9660_OK) {
+                printf("An error occurred during file read!\n");
+                break;
+            }
+
+            // Check for End-Of-File
+            if (bytes_read == 0) {
+                break; // We're done
+            }
+
+            // Process the data we just read
+            total_bytes += bytes_read;
+            file_buffer[bytes_read] = '\0'; // Null-terminate the chunk
+            printf(file_buffer);      // Print the chunk
+        }
+        
+        printf("\n--- EOF ---\n");
+        printf("Total bytes read: ");
+        printf("0x%X\n", total_bytes);
+    }
+}
+
 void kmain(unsigned int magic, unsigned int info)
 {
 	struct multiboot_info mbi;
@@ -103,10 +197,8 @@ void kmain(unsigned int magic, unsigned int info)
 	printf("huy1 points to: 0x%X huy2 points to:0x%X\n", huy, huy2);
 	printf("huy1: %s\nhuy2: %s", huy, huy2);
 
-	uint8_t buffer[2048];
+	test_iso9660();
 
-	read_cdrom(0x170, false, 1230, 1, (uint16_t*)buffer);
-	printf("buffer:\n %s\n", buffer);
 	//exec_from_file("/ebalo/main", "/ebalo/");
 
 	while(1)