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[statsd] Use direct appends and stack buffer instead of str_sprintf (#13223)

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
J. Nick Koston
2026-01-19 17:40:20 -10:00
committed by GitHub
parent ea70faf642
commit 280d460025
1 changed files with 12 additions and 4 deletions
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16
esphome/components/statsd/statsd.cpp
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@@ -114,14 +114,22 @@ void StatsdComponent::update() {
// This implies you can't explicitly set a gauge to a negative number without first setting it to zero.
if (val < 0) {
if (this->prefix_) {
out.append(str_sprintf("%s.", this->prefix_));
out.append(this->prefix_);
out.append(".");
}
out.append(str_sprintf("%s:0|g\n", s.name));
out.append(s.name);
out.append(":0|g\n");
}
if (this->prefix_) {
out.append(str_sprintf("%s.", this->prefix_));
out.append(this->prefix_);
out.append(".");
}
out.append(str_sprintf("%s:%f|g\n", s.name, val));
out.append(s.name);
// Buffer for ":" + value + "|g\n".
// %f with -DBL_MAX can produce up to 321 chars, plus ":" and "|g\n" (4) + null = 326
char val_buf[330];
buf_append_printf(val_buf, sizeof(val_buf), 0, ":%f|g\n", val);
out.append(val_buf);
if (out.length() > SEND_THRESHOLD) {
this->send_(&out);