time: functions named "internal" really shouldn't be exported

Also, let's try to make function names descriptive, instead of using
bools for flags.

src/journal/journalctl.c

@@ -127,6 +127,14 @@ static void pager_open_if_enabled(void) {
         pager_open(arg_pager_end);
 }
 
+static char *format_timestamp_maybe_utc(char *buf, size_t l, usec_t t) {
+
+        if (arg_utc)
+                return format_timestamp_utc(buf, l, t);
+
+        return format_timestamp(buf, l, t);
+}
+
 static int parse_boot_descriptor(const char *x, sd_id128_t *boot_id, int *offset) {
         sd_id128_t id = SD_ID128_NULL;
         int off = 0, r;
@@ -890,8 +898,8 @@ static int list_boots(sd_journal *j) {
                 printf("% *i " SD_ID128_FORMAT_STR " %s—%s\n",
                        w, i - count + 1,
                        SD_ID128_FORMAT_VAL(id->id),
-                       format_timestamp_internal(a, sizeof(a), id->first, arg_utc),
-                       format_timestamp_internal(b, sizeof(b), id->last, arg_utc));
+                       format_timestamp_maybe_utc(a, sizeof(a), id->first),
+                       format_timestamp_maybe_utc(b, sizeof(b), id->last));
         }
 
         return 0;
@@ -1502,8 +1510,8 @@ static int verify(sd_journal *j) {
                         if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header)) {
                                 if (validated > 0) {
                                         log_info("=> Validated from %s to %s, final %s entries not sealed.",
-                                                 format_timestamp_internal(a, sizeof(a), first, arg_utc),
-                                                 format_timestamp_internal(b, sizeof(b), validated, arg_utc),
+                                                 format_timestamp_maybe_utc(a, sizeof(a), first),
+                                                 format_timestamp_maybe_utc(b, sizeof(b), validated),
                                                  format_timespan(c, sizeof(c), last > validated ? last - validated : 0, 0));
                                 } else if (last > 0)
                                         log_info("=> No sealing yet, %s of entries not sealed.",
@@ -1898,11 +1906,11 @@ int main(int argc, char *argv[]) {
                 if (r > 0) {
                         if (arg_follow)
                                 printf("-- Logs begin at %s. --\n",
-                                       format_timestamp_internal(start_buf, sizeof(start_buf), start, arg_utc));
+                                       format_timestamp_maybe_utc(start_buf, sizeof(start_buf), start));
                         else
                                 printf("-- Logs begin at %s, end at %s. --\n",
-                                       format_timestamp_internal(start_buf, sizeof(start_buf), start, arg_utc),
-                                       format_timestamp_internal(end_buf, sizeof(end_buf), end, arg_utc));
+                                       format_timestamp_maybe_utc(start_buf, sizeof(start_buf), start),
+                                       format_timestamp_maybe_utc(end_buf, sizeof(end_buf), end));
                 }
         }
 

src/shared/logs-show.c

@@ -447,7 +447,9 @@ static int output_verbose(
         }
 
         fprintf(f, "%s [%s]\n",
-                format_timestamp_us(ts, sizeof(ts), realtime, flags & OUTPUT_UTC),
+                flags & OUTPUT_UTC ?
+                format_timestamp_us_utc(ts, sizeof(ts), realtime) :
+                format_timestamp_us(ts, sizeof(ts), realtime),
                 cursor);
 
         JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {

src/shared/time-util.c

@@ -152,7 +152,7 @@ struct timeval *timeval_store(struct timeval *tv, usec_t u) {
         return tv;
 }
 
-char *format_timestamp_internal(char *buf, size_t l, usec_t t, bool utc) {
+static char *format_timestamp_internal(char *buf, size_t l, usec_t t, bool utc) {
         struct tm tm;
         time_t sec;
 
@@ -178,7 +178,11 @@ char *format_timestamp(char *buf, size_t l, usec_t t) {
         return format_timestamp_internal(buf, l, t, false);
 }
 
-char *format_timestamp_us(char *buf, size_t l, usec_t t, bool utc) {
+char *format_timestamp_utc(char *buf, size_t l, usec_t t) {
+        return format_timestamp_internal(buf, l, t, true);
+}
+
+static char *format_timestamp_internal_us(char *buf, size_t l, usec_t t, bool utc) {
         struct tm tm;
         time_t sec;
 
@@ -203,6 +207,14 @@ char *format_timestamp_us(char *buf, size_t l, usec_t t, bool utc) {
         return buf;
 }
 
+char *format_timestamp_us(char *buf, size_t l, usec_t t) {
+        return format_timestamp_internal_us(buf, l, t, false);
+}
+
+char *format_timestamp_us_utc(char *buf, size_t l, usec_t t) {
+        return format_timestamp_internal_us(buf, l, t, true);
+}
+
 char *format_timestamp_relative(char *buf, size_t l, usec_t t) {
         const char *s;
         usec_t n, d;

src/shared/time-util.h

@@ -84,9 +84,10 @@ struct timespec *timespec_store(struct timespec *ts, usec_t u);
 usec_t timeval_load(const struct timeval *tv) _pure_;
 struct timeval *timeval_store(struct timeval *tv, usec_t u);
 
-char *format_timestamp_internal(char *buf, size_t l, usec_t t, bool utc);
 char *format_timestamp(char *buf, size_t l, usec_t t);
-char *format_timestamp_us(char *buf, size_t l, usec_t t, bool utc);
+char *format_timestamp_utc(char *buf, size_t l, usec_t t);
+char *format_timestamp_us(char *buf, size_t l, usec_t t);
+char *format_timestamp_us_utc(char *buf, size_t l, usec_t t);
 char *format_timestamp_relative(char *buf, size_t l, usec_t t);
 char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy);