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MINOR: contrib/prometheus-exporter: better output of Not-a-Number

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Not necessarily mandatory but I saw a few prometheus client parsing only
`NaN`. Also most librarries do output `NaN`

Signed-off-by: William Dauchy <wdauchy@gmail.com>
This commit is contained in:
William Dauchy 2021-01-22 21:09:47 +01:00 committed by Christopher Faulet
parent 8596bfbafd
commit 18a2c6ed49
1 changed files with 4 additions and 4 deletions
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8
contrib/prometheus-exporter/service-prometheus.c
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@ -415,7 +415,7 @@ static int promex_srv_status(struct server *sv)
/* Convert a field to its string representation and write it in <out>, followed
* by a newline, if there is enough space. non-numeric value are converted in
* "Nan" because Prometheus only support numerical values (but it is unexepceted
* "NaN" because Prometheus only support numerical values (but it is unexepceted
* to process this kind of value). It returns 1 on success. Otherwise, it
* returns 0. The buffer's length must not exceed <max> value.
*/
@ -424,14 +424,14 @@ static int promex_metric_to_str(struct buffer *out, struct field *f, size_t max)
int ret = 0;
switch (field_format(f, 0)) {
case FF_EMPTY: ret = chunk_strcat(out, "Nan\n"); break;
case FF_EMPTY: ret = chunk_strcat(out, "NaN\n"); break;
case FF_S32: ret = chunk_appendf(out, "%d\n", f->u.s32); break;
case FF_U32: ret = chunk_appendf(out, "%u\n", f->u.u32); break;
case FF_S64: ret = chunk_appendf(out, "%lld\n", (long long)f->u.s64); break;
case FF_U64: ret = chunk_appendf(out, "%llu\n", (unsigned long long)f->u.u64); break;
case FF_FLT: ret = chunk_appendf(out, "%f\n", f->u.flt); break;
case FF_STR: ret = chunk_strcat(out, "Nan\n"); break;
default: ret = chunk_strcat(out, "Nan\n"); break;
case FF_STR: ret = chunk_strcat(out, "NaN\n"); break;
default: ret = chunk_strcat(out, "NaN\n"); break;
}
if (!ret || out->data > max)
return 0;