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| author | Garrett D'Amore <garrett@damore.org> | 2019-11-10 05:47:37 -0800 |
|---|---|---|
| committer | Garrett D'Amore <garrett@damore.org> | 2019-11-10 05:47:37 -0800 |
| commit | 21b40e0b51c39a19574c1fe79a48872558189770 (patch) | |
| tree | 57c9129a26e8feab8d0db6541ee6dc764934a2fd /docs | |
| parent | 20065fd19ecec1feadf8ba6c36724da6ac62d21d (diff) | |
| download | nng-21b40e0b51c39a19574c1fe79a48872558189770.tar.gz nng-21b40e0b51c39a19574c1fe79a48872558189770.tar.bz2 nng-21b40e0b51c39a19574c1fe79a48872558189770.zip | |
fixes #999 NNG_OPT_SUB_SUBSCRIBE: nng_setopt vs nng_setopt_string
This is just a documentation clarification around the hazard of
using nng_setopt_string with NNG_OPT_SUBSCRIBE.
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/man/nng_sub.7.adoc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/man/nng_sub.7.adoc b/docs/man/nng_sub.7.adoc index aef1a9e4..2d0e6de1 100644 --- a/docs/man/nng_sub.7.adoc +++ b/docs/man/nng_sub.7.adoc @@ -65,6 +65,13 @@ The following protocol-specific options are available. message is accepted. If no topic matches, then the message is discarded. + +NOTE: This option is a byte array. Thus if you use +xref:nng_setopt.3.adoc[`nng_setopt_string()`] the `NUL` terminator byte will +be included in the topic. +If that isn't desired, consider using +xref:nng_setopt.3.adoc[`nng_setopt()`] and using `strlen()` of the topic +as the topic size. ++ TIP: To receive all messages, an empty topic (zero length) can be used. ((`NNG_OPT_SUB_UNSUBSCRIBE`)):: |