libbb: introduce and use strftime_[YYYYMMDD]HHMMSS()

[oweals/busybox.git] / libbb / time.c

diff --git a/libbb/time.c b/libbb/time.c
index e2b938471357a264e34ebe08dbf750a5d5080d1f..57e14b66c6d5be590ba2218e49a8a4b29c5a685f 100644 (file)
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -187,6 +187,27 @@ time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *ptm)
        return t;
 }
 
+static char* strftime_fmt(char *buf, unsigned len, time_t *tp, const char *fmt)
+{
+       time_t t;
+       if (!tp) {
+               tp = &t;
+               time(tp);
+       }
+       /* Returns pointer to NUL */
+       return buf + strftime(buf, len, fmt, localtime(tp));
+}
+
+char* FAST_FUNC strftime_HHMMSS(char *buf, unsigned len, time_t *tp)
+{
+       return strftime_fmt(buf, len, tp, "%H:%M:%S");
+}
+
+char* FAST_FUNC strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp)
+{
+       return strftime_fmt(buf, len, tp, "%Y-%m-%d %H:%M:%S");
+}
+
 #if ENABLE_MONOTONIC_SYSCALL
 
 #include <sys/syscall.h>