View source for 7bit

''Bin7'' is a Mailutils [[filter]].  It operates in both [[MU_FILTER_ENCODE|encode]] and [[MU_FILTER_DECODE|decode]] modes.  

In ''encode'' mode, the ''bin7'' filter converts its input into 7-bit ASCII, by clearing the 8th bit on each processed byte.

In ''decode'' mode, it operates exactly as the [[8bit]] filter, i.e. copies its input to the output verbatim.

This filter is described in <tt>mailutils/filter.h</tt>:

<source lang="C">
extern mu_filter_record_t mu_bit7_filter;
</source>

To create this filter, use the [[mu_filter_stream_create]] function:

<source lang="C">
  int rc;          /* Return code */
  mu_stream_t flt; /* Filter stream */
  mu_stream_t input; /* Input stream */

  initialize_input_stream (&stream);
  rc = mu_filter_stream_create (&flt, input, "bin7", MU_FILTER_DECODE, MU_STREAM_READ);
</source>

[[Category:Filters]]