int read_code_points()

in source/huffman_generator/generator.c [43:106]
43 lines of code
12 McCabe index (conditional complexity)

int read_code_points(const char *input_path) {

    memset(code_points, 0, sizeof(code_points));
    FILE *file = aws_fopen(input_path, "r");
    if (!file) {
        printf("Failed to open file '%s' for read.", input_path);
        return 1;
    }

    static const char HC_KEYWORD[] = "HUFFMAN_CODE";
    static const size_t HC_KW_LEN = sizeof(HC_KEYWORD) - 1;

    int is_comment = 0;
    char line[120];
    while (fgets(line, sizeof(line), file) != NULL) {
        const size_t line_length = strlen(line);

        if (line[0] == '#') {
            /* Ignore preprocessor directives */
            continue;
        }
        for (size_t i = 0; i < line_length - 1; ++i) {
            if (!is_comment) {
                if (line[i] == '/' && line[i + 1] == '*') {
                    is_comment = 1;
                } else if (strncmp(&line[i], HC_KEYWORD, HC_KW_LEN) == 0) {
                    /* Found code, parse it */

                    /* Skip macro */
                    const char *current_char = &line[i + HC_KW_LEN];
                    current_char += skip_whitespace(current_char);
                    /* Skip ( */
                    assert(*current_char == '(');
                    ++current_char;

                    /* Parse symbol */
                    uint8_t symbol = (uint8_t)atoi(current_char);
                    struct huffman_code_point *code_point = &code_points[symbol];

                    assert(!code_point->symbol && "Symbol already found!");

                    code_point->symbol = symbol;

                    current_char += read_past_comma(current_char);
                    /* Skip the binary string form */
                    current_char += read_past_comma(current_char);

                    /* Parse bits */
                    code_point->code.bits = (uint32_t)strtol(current_char, NULL, 16);

                    current_char += read_past_comma(current_char);

                    code_point->code.num_bits = (uint8_t)atoi(current_char);
                }
            } else if (line[i] == '*' && line[i + 1] == '/') {
                is_comment = 0;
            }
        }
    }

    fclose(file);

    return 0;
}