/*
 * Copyright 2009, Michael Lotz, mmlr@mlotz.ch.
 * Distributed under the terms of the MIT License.
 */

#include <File.h>
#include <Message.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


int
main(int argc, char *argv[])
{
        if (argc < 2 || argc > 3) {
                printf("usage: %s <flattened message file> [index]\n", argv[0]);
                return 1;
        }

        BFile input(argv[1], B_READ_ONLY);
        if (!input.IsReadable()) {
                printf("cannot open \"%s\" for reading\n", argv[1]);
                return 2;
        }

        off_t fileSize;
        status_t result;
        if ((result = input.GetSize(&fileSize)) != B_OK) {
                printf("cannot determine size of file \"%s\"\n", argv[1]);
                return 3;
        }

        int index = argc > 2 ? atoi(argv[2]) : 0;

        for (int i = 1; input.Position() < fileSize; ++i) {
                BMessage message;
                result = message.Unflatten(&input);
                if (result != B_OK) {
                        printf("failed to unflatten message: %s\n", strerror(result));
                        return 4;
                }
                if (index == 0 || i == index)
                        message.PrintToStream();
        }

        return 0;
}