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preamble: Check to see if PMT key is actually a symbol before converting

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to string.
This commit is contained in:
Nick Foster 2015-07-09 12:23:52 -07:00
parent 93078a8cae
commit c96dea7fa0
1 changed files with 3 additions and 1 deletions
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lib/preamble_impl.cc
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@ -98,7 +98,9 @@ static double correlate_preamble(const float *in, int samples_per_chip) {
}
static pmt::pmt_t tag_to_timestamp(gr::tag_t tstamp, uint64_t abs_sample_cnt, int rate) {
if(tstamp.key == NULL || pmt::symbol_to_string(tstamp.key) != "rx_time") return 0;
if(tstamp.key == NULL) return 0;
if(!pmt::is_symbol(tstamp.key)) return 0;
if(pmt::symbol_to_string(tstamp.key) != "rx_time") return 0;
//the timestamp tag has tstamp.offset, the sample index of the timestamp tag
//also tstamp.value, a pmt pair with (uint64, double) representing int and