[Zlib-devel] Allow read-only data as input

[Lasse Collin]

On 2011-03-28 Sebastian Huber wrote:
>  typedef struct z_stream_s {
> -    Bytef    *next_in;  /* next input byte */
> +    const Bytef *next_in; /* next input byte */
>      uInt     avail_in;  /* number of bytes available at next_in */
>      uLong    total_in;  /* total nb of input bytes read so far */
> 
> This allows you to pass read-only data as input (without a nasty
> cast, e.g. gzwrite.c line 210).  Please have a look at the attached
> patch.  The format is quite broken with this patch.

I agree that it could have been nice to have the const there, but I 
think it is too late to change it. Existing applications already have 
the required casts. Adding the const now would require fixing 
applications that assume that next_in isn't const.

-- 
Lasse Collin  |  IRC: Larhzu @ IRCnet & Freenode