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[statsd] Use direct appends and stack buffer instead of str_sprintf

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This commit is contained in:
J. Nick Koston
2026-01-14 15:27:04 -10:00
parent 03f3deff41
commit 0ea5d7abff
1 changed files with 13 additions and 4 deletions
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17
esphome/components/statsd/statsd.cpp
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@@ -114,14 +114,23 @@ 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".
// %g uses max 13 chars for value (sign + 6 significant digits + e+xxx)
// Total: 1 + 13 + 4 = 18 chars + null, use 24 for safety
char val_buf[24];
snprintf(val_buf, sizeof(val_buf), ":%g|g\n", val);
out.append(val_buf);
if (out.length() > SEND_THRESHOLD) {
this->send_(&out);