formats: fallback to scientific notation when out of range

Signed-off-by: He Xian <[email protected]>
hexian000 · Nov 24, 2024 · 5ef83d4 · 5ef83d4
1 parent 41a1ee0
commit 5ef83d4
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/contrib/csnippets/utils/formats.c b/contrib/csnippets/utils/formats.c
@@ -23,6 +23,9 @@ int format_si_prefix(char *buf, const size_t bufsize, const double value)
 	if (!isnormal(value)) {
 		return snprintf(buf, bufsize, "%.0f", value);
 	}
+	if (!(1e-30 < value && value < 1e+31)) {
+		return snprintf(buf, bufsize, "%.2e", value);
+	}
 	const int e = (int)floor(log10(fabs(value)) / 3.0);
 	if (e == 0) {
 		return snprintf(buf, bufsize, "%.3g", value);