#include "initrd.h"

#include <stdint.h>

#include <lib/print.h>
#include <lib/memory.h>

void parse_cpio(void *initrd_start) {
    cpio_header_t *head = (cpio_header_t *)initrd_start;

    while (strncmp(head->c_magic, "070701", 6) == 0) {
        // If we hit the trailer, we are done
        char *filename = (char *)(head + 1); 
        if (strncmp(filename, "TRAILER!!!", 10) == 0) {
            break; 
        }

        uint32_t filesize = parse_hex(head->c_filesize);
        uint32_t namesize = parse_hex(head->c_namesize);
        
        kprintf("found file of size %d\n", filesize);

        // Calculate where the data begins (accounting for 4-byte padding)
        uint32_t header_plus_name = 110 + namesize;
        header_plus_name = (header_plus_name + 3) & ~3; // Align to 4 bytes
        
        char *file_data = (char *)head + header_plus_name;

        uint32_t total_record_size = header_plus_name + filesize;
        total_record_size = (total_record_size + 3) & ~3; // Align to 4 bytes
        
        head = (cpio_header_t *)((char *)head + total_record_size);
    }
}