int _CDECL main()

in src/unchunk/unchunk.cpp [58:126]

• 58 lines of code
• 17 McCabe index (conditional complexity)

int _CDECL main(int argc, char *argv[])
{
    if (argc < 3) {
        fprintf(stderr, "unchunk: remove HTTP chunk headers from a binary file\n", argv[1]);
        fprintf(stderr, "Usage unchunk <infile> <outfile>\n", argv[1]);
    }

    f = freopen(argv[1], "rb", stdin);
    if (NULL == f) {
        fprintf(stderr, "Enable to open input file %s\n", argv[1]);
        return errno;
    }

    g = freopen(argv[2], "wb", stdout);

    if (NULL == g) {
        fprintf(stderr, "Enable to create output file %s\n", argv[2]);
        return errno;
    }

    vector<char> chars;
    size_t length;
    chars.clear();
    int c;

    c = getchar();
    if (is_hexdigit(c)) goto parse;
    if ('\xD' != c) goto wrong_char;
    c = getchar();
    if (is_hexdigit(c)) goto parse;
    if ('\xA' != c) goto wrong_char;

parse:
    while (1) {
        length = 0;
        while (is_hexdigit(c)) {
            length = (length << 4) + hexdigit(c);
            c = getchar();
        }

        if ('\xD' != c) goto wrong_char;
        c = getchar();
        if ('\xA' != c) goto wrong_char;

        if (!copy(length)) {
            fprintf(stderr, "Unable to copy block, input file prematurely ended\n");
            return errno;
        }

        c = getchar();
        if ('\xD' != c) goto wrong_char;
        c = getchar();
        if ('\xA' != c) goto wrong_char;
        c = getchar();
        if (0 == length) {
            return 0;
        }
    }

wrong_char:
    if (c < 0) {
        fprintf(stderr, "Input file prematurely ended while trying to read chunk header\n");
    }
    else {
        fprintf(stderr, "whong character encountered in chunk header: %x\n", c);
    }

    return 1;
}