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authorManuel Novoa III <mjn3@codepoet.org>2001-01-28 19:30:44 +0000
committerManuel Novoa III <mjn3@codepoet.org>2001-01-28 19:30:44 +0000
commit086815d394e998eddda65c4800accdac1e2ff79b (patch)
tree9d3587a10e1c08adcfa9b89f1604ce5741e4bc7e /libc
parente2ee4a8471f3999f271c69a57e960e9bee4aa874 (diff)
Reduced code size; fixed ANSI bug for day -- 5 not 05; mode days and mons const.
Diffstat (limited to 'libc')
-rw-r--r--libc/misc/time/asc_conv.c76
1 files changed, 48 insertions, 28 deletions
diff --git a/libc/misc/time/asc_conv.c b/libc/misc/time/asc_conv.c
index 9f8c25844..78339dd6c 100644
--- a/libc/misc/time/asc_conv.c
+++ b/libc/misc/time/asc_conv.c
@@ -5,43 +5,63 @@
* Internal ascii conversion routine, avoid use of printf, it's a bit big!
*/
-
-static void hit(buf, val)
-char *buf;
-int val;
-{
- *buf = '0' + val % 10;
-}
+/*
+ * Modified Manuel Novoa III Jan 2001
+ *
+ * Removed static function "hit" and did time-field fills inline and
+ * put day, hour, min, and sec conversions in a loop using a small
+ * table to reduce code size.
+ *
+ * Made daysp[] and mons[] const to move them from bss to text.
+ *
+ * Also fixed day conversion ... ANSI says no leading 0.
+ *
+ */
void __asctime(buffer, ptm)
register char *buffer;
struct tm *ptm;
{
- static char days[] = "SunMonTueWedThuFriSat";
- static char mons[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
- int year;
+ static const char days[] = "SunMonTueWedThuFriSat";
+ static const char mons[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
+ /* 012345678901234567890123456 */
+ static const char template[] = "Err Err 00 00:00:00 0000\n";
+ int tm_field[4];
+ int tmp, i;
+ char *p;
+
+ /* Since we need memcpy below, use it here instead of strcpy. */
+ memcpy(buffer, template, sizeof(template));
- /* 012345678901234567890123456 */
- strcpy(buffer, "Err Err .. ..:..:.. ....\n");
- if ((ptm->tm_wday >= 0) && (ptm->tm_wday <= 6))
+ if ((ptm->tm_wday >= 0) && (ptm->tm_wday <= 6)) {
memcpy(buffer, days + 3 * (ptm->tm_wday), 3);
+ }
- if ((ptm->tm_mon >= 0) && (ptm->tm_mon <= 11))
+ if ((ptm->tm_mon >= 0) && (ptm->tm_mon <= 11)) {
memcpy(buffer + 4, mons + 3 * (ptm->tm_mon), 3);
+ }
+
+ tm_field[0] = ptm->tm_mday;
+ tm_field[1] = ptm->tm_hour;
+ tm_field[2] = ptm->tm_min;
+ tm_field[3] = ptm->tm_sec;
+
+ p = buffer + 9;
+ for (i=0 ; i<4 ; i++) {
+ tmp = tm_field[i];
+ *p-- += tmp % 10;
+ *p += (tmp/10) % 10;
+ p += 4 ; /* skip to end of next field */
+ }
+ tmp = ptm->tm_year + 1900;
+ p = buffer + 23;
+ for (i=0 ; i<4 ; i++) {
+ *p-- += tmp % 10;
+ tmp /= 10;
+ }
- hit(buffer + 8, ptm->tm_mday / 10);
- hit(buffer + 9, ptm->tm_mday);
- hit(buffer + 11, ptm->tm_hour / 10);
- hit(buffer + 12, ptm->tm_hour);
- hit(buffer + 14, ptm->tm_min / 10);
- hit(buffer + 15, ptm->tm_min);
- hit(buffer + 17, ptm->tm_sec / 10);
- hit(buffer + 18, ptm->tm_sec);
-
- year = ptm->tm_year + 1900;
- hit(buffer + 20, year / 1000);
- hit(buffer + 21, year / 100);
- hit(buffer + 22, year / 10);
- hit(buffer + 23, year);
+ if (buffer[8] == '0') {
+ buffer[8] = ' ';
+ }
}