Difference between revisions of "From (filter)"
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The following code creates an instance of read-only <tt>from</tt> stream which adds the ''greater-than'' character to each "<tt>>From </tt>" at the beginning of a line (the <tt>mu_stream_t input</tt> is supposed to have been initialized previously): | The following code creates an instance of read-only <tt>from</tt> stream which adds the ''greater-than'' character to each "<tt>>From </tt>" at the beginning of a line (the <tt>mu_stream_t input</tt> is supposed to have been initialized previously): | ||
| − | < | + | <syntaxhighlight lang="C"> |
int rc; /* Return code */ | int rc; /* Return code */ | ||
mu_stream_t flt; /* Filter stream */ | mu_stream_t flt; /* Filter stream */ | ||
rc = mu_filter_create (&flt, input, "from", MU_FILTER_ENCODE, MU_STREAM_READ); | rc = mu_filter_create (&flt, input, "from", MU_FILTER_ENCODE, MU_STREAM_READ); | ||
| − | </ | + | </syntaxhighlight> |
The object describing this filter is declared in <tt>mailutils/filter.h</tt> as follows: | The object describing this filter is declared in <tt>mailutils/filter.h</tt> as follows: | ||
| − | < | + | <syntaxhighlight lang="C"> |
extern mu_filter_record_t mu_from_filter; | extern mu_filter_record_t mu_from_filter; | ||
| − | </ | + | </syntaxhighlight> |
[[Category:Filters]] | [[Category:Filters]] | ||
[[Category:C API]] | [[Category:C API]] | ||
Latest revision as of 13:22, 16 October 2023
The from filter performs a traditional UNIX processing of lines starting with a From followed by a space character.
- Encode mode
- In encode mode, each "From " at the beginning of a line is replaced by ">From "
- Decode mode
- In decode mode, the reverse operation is performed: initial greater-then sign (>) is removed from any line starting with ">From ".
The following code creates an instance of read-only from stream which adds the greater-than character to each ">From " at the beginning of a line (the mu_stream_t input is supposed to have been initialized previously):
int rc; /* Return code */
mu_stream_t flt; /* Filter stream */
rc = mu_filter_create (&flt, input, "from", MU_FILTER_ENCODE, MU_STREAM_READ);
The object describing this filter is declared in mailutils/filter.h as follows:
extern mu_filter_record_t mu_from_filter;
