#include "header.h"
#include "link.h"
#include "sym.h"
#include <stdio.h>
#include <string.h>

int link_kern(const Args* args, FileIter input_files)
{
    int res = 0;

    SymTable sym_table;
    sym_table_construct(&sym_table);
    SymTable* syms = &sym_table;

    uint16_t offset = 0;

    FILE* output_fp = open_output_file(args->output_file);
    if (!output_fp) {
        res = -1;
        goto leave_0;
    }

    FILE* input_fp = NULL;
    Header header = (Header) { 0 };

    const char* input_filename = file_iter_next(&input_files);
    while (input_filename != NULL) {
        input_fp = open_input_file(input_filename);
        if (!input_fp) {
            res = -1;
            goto leave_0;
        }

        res = header_read_from(&header, input_fp, input_filename);
        if (res != 0)
            goto leave_1;

        header_print(&header);

        sym_table_walk_header(syms, &header, offset, input_filename);

        fclose(input_fp);
        input_fp = NULL;

        input_filename = file_iter_next(&input_files);
    }

    res = 0;
leave_1:
    if (input_fp)
        fclose(input_fp);
    if (header.header_size != 0)
        header_destroy(&header);
    fclose(output_fp);
    sym_table_destroy(&sym_table);
leave_0:
    return res;
}