From fd34aa1956db826523c1787d189d3b1520469190 Mon Sep 17 00:00:00 2001
From: anth64 <anth64@protonmail.com>
Date: Tue, 15 Sep 2026 12:58:45 +0200
Subject: [PATCH] feat: format elapsed time as human-readable d/h/m/s duration

---
 tools/fpack.c   | 33 ++++++++++++++++++++++++++++++---
 tools/funpack.c | 33 ++++++++++++++++++++++++++++++---
 2 files changed, 60 insertions(+), 6 deletions(-)

diff --git a/tools/fpack.c b/tools/fpack.c
index ea711f8..53ac512 100644
--- a/tools/fpack.c
+++ b/tools/fpack.c
@@ -39,6 +39,29 @@ static double now_seconds(void)
 #endif
 }
 
+static void format_duration(double secs, char *buf, size_t bufsize)
+{
+	unsigned long total_ms = (unsigned long)(secs * 1000.0 + 0.5);
+	unsigned long ms = total_ms % 1000;
+	unsigned long total_s = total_ms / 1000;
+	unsigned long s = total_s % 60;
+	unsigned long total_m = total_s / 60;
+	unsigned long m = total_m % 60;
+	unsigned long total_h = total_m / 60;
+	unsigned long h = total_h % 24;
+	unsigned long d = total_h / 24;
+
+	if (d > 0)
+		sprintf(buf, "%lud %luh %lum %lus", d, h, m, s);
+	else if (h > 0)
+		sprintf(buf, "%luh %lum %lus", h, m, s);
+	else if (m > 0)
+		sprintf(buf, "%lum %lu.%03lus", m, s, ms);
+	else
+		sprintf(buf, "%lu.%03lus", s, ms);
+	buf[bufsize - 1] = '\0';
+}
+
 #define FPACK_QUIET    (1u << 0)
 #define FPACK_VERBOSE  (1u << 1)
 #define FPACK_PROGRESS (1u << 2)
@@ -344,9 +367,13 @@ int main(int argc, char **argv)
 	if (flags & FPACK_PROGRESS)
 		printf("\n");
 
-	if (!(flags & FPACK_QUIET))
-		printf("wrote: %s (%lu entries) in %.3fs\n", output,
-		       (unsigned long)entry_count, now_seconds() - start_time);
+	if (!(flags & FPACK_QUIET)) {
+		char dur[64];
+
+		format_duration(now_seconds() - start_time, dur, sizeof(dur));
+		printf("wrote: %s (%lu entries) in %s\n", output,
+		       (unsigned long)entry_count, dur);
+	}
 
 	free(output);
 	return 0;
diff --git a/tools/funpack.c b/tools/funpack.c
index 74ccd9a..08ea4bf 100644
--- a/tools/funpack.c
+++ b/tools/funpack.c
@@ -37,6 +37,29 @@ static double now_seconds(void)
 #endif
 }
 
+static void format_duration(double secs, char *buf, size_t bufsize)
+{
+	unsigned long total_ms = (unsigned long)(secs * 1000.0 + 0.5);
+	unsigned long ms = total_ms % 1000;
+	unsigned long total_s = total_ms / 1000;
+	unsigned long s = total_s % 60;
+	unsigned long total_m = total_s / 60;
+	unsigned long m = total_m % 60;
+	unsigned long total_h = total_m / 60;
+	unsigned long h = total_h % 24;
+	unsigned long d = total_h / 24;
+
+	if (d > 0)
+		sprintf(buf, "%lud %luh %lum %lus", d, h, m, s);
+	else if (h > 0)
+		sprintf(buf, "%luh %lum %lus", h, m, s);
+	else if (m > 0)
+		sprintf(buf, "%lum %lu.%03lus", m, s, ms);
+	else
+		sprintf(buf, "%lu.%03lus", s, ms);
+	buf[bufsize - 1] = '\0';
+}
+
 #define FUNPACK_LIST     (1u << 0)
 #define FUNPACK_PROGRESS (1u << 1)
 #define FUNPACK_QUIET    (1u << 2)
@@ -309,9 +332,13 @@ int main(int argc, char **argv)
 	if ((flags & FUNPACK_PROGRESS) && count > 0)
 		printf("\n");
 
-	if (!(flags & FUNPACK_QUIET))
-		printf("unpacked: %s -> %s (%lu entries) in %.3fs\n", input, out_dir,
-		       (unsigned long)count, now_seconds() - start_time);
+	if (!(flags & FUNPACK_QUIET)) {
+		char dur[64];
+
+		format_duration(now_seconds() - start_time, dur, sizeof(dur));
+		printf("unpacked: %s -> %s (%lu entries) in %s\n", input, out_dir,
+		       (unsigned long)count, dur);
+	}
 
 	free(out_dir);
 	return 0;