Function process_variable_alpha

hellwal.c:1827–1852

}

char *process_variable_alpha(char *color, char *value, enum COLOR_TYPES type)
{
    if ((type != HEX_t && type != RGB_t) || !is_between_01_float(value))
        return color;

    const float alpha_value = strtod(value, NULL);
    char *buffer = NULL;

    if (type == HEX_t)
    {
        buffer = malloc(sizeof(color) + 3); // 3 because 2 next hex aplha numbers
                                            // and 1 null termination
        int a = (int)(alpha_value * 255);
        sprintf(buffer, "%s%02x", color, a);
    }
    else // we can safely assume it's rgb
    {
        buffer = malloc(sizeof(color) + sizeof(",    "));
        sprintf(buffer, "%s, %f", color, alpha_value);
    }

    if (buffer != NULL)
        return buffer;

    return color;
}

/* 
 * Loads content from file file to buffer,