Subject: [PATCH v20240912 2/4] Continue to remove some unnecesary strlen calls

From: Andy Fan <[email-masked]>
Date: Wed, 11 Sep 2024 12:21:39 +0800

sprintf return the number of characters printed (not including the
trailing `\0'), so it is exactly same as strlen. so we can reuse that
value and avoid a strlen call.
---
 src/backend/utils/adt/datetime.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index 7abdc62f41..586bec8466 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -4594,6 +4594,7 @@ EncodeInterval(struct pg_itm *itm, int style, char *str)
 	int			fsec = itm->tm_usec;
 	bool		is_before = false;
 	bool		is_zero = true;
+	int			data_len;
 
 	/*
 	 * The sign of year and month are guaranteed to match, since they are
@@ -4651,11 +4652,11 @@ EncodeInterval(struct pg_itm *itm, int style, char *str)
 					char		sec_sign = (hour < 0 || min < 0 ||
 											sec < 0 || fsec < 0) ? '-' : '+';
 
-					sprintf(cp, "%c%d-%d %c%lld %c%lld:%02d:",
-							year_sign, abs(year), abs(mon),
-							day_sign, (long long) i64abs(mday),
-							sec_sign, (long long) i64abs(hour), abs(min));
-					cp += strlen(cp);
+					data_len = sprintf(cp, "%c%d-%d %c%lld %c%lld:%02d:",
+									   year_sign, abs(year), abs(mon),
+									   day_sign, (long long) i64abs(mday),
+									   sec_sign, (long long) i64abs(hour), abs(min));
+					cp += data_len;
 					cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
 					*cp = '\0';
 				}
@@ -4665,16 +4666,16 @@ EncodeInterval(struct pg_itm *itm, int style, char *str)
 				}
 				else if (has_day)
 				{
-					sprintf(cp, "%lld %lld:%02d:",
-							(long long) mday, (long long) hour, min);
-					cp += strlen(cp);
+					data_len = sprintf(cp, "%lld %lld:%02d:",
+									   (long long) mday, (long long) hour, min);
+					cp += data_len;
 					cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
 					*cp = '\0';
 				}
 				else
 				{
-					sprintf(cp, "%lld:%02d:", (long long) hour, min);
-					cp += strlen(cp);
+					data_len = sprintf(cp, "%lld:%02d:", (long long) hour, min);
+					cp += data_len;
 					cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
 					*cp = '\0';
 				}
-- 
2.45.1

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Content-Disposition: attachment;
 filename=v20240912-0004-Make-printtup-a-bit-faster-intermediate-st.patch