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Prevented time rollover outside year intervals 1900-2155 and 1-9999

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This commit is contained in:
Thomas Schmitt 2020-09-21 21:17:20 +02:00
parent f962d0da66
commit d297ce3aed
1 changed files with 28 additions and 6 deletions
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34
libisofs/util.c
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@ -1597,6 +1597,22 @@ void iso_datetime_7(unsigned char *buf, time_t t, int always_gmt)
gmtime_r(&t, &tm); gmtime_r(&t, &tm);
tzoffset = 0; tzoffset = 0;
} }
if (tm.tm_year < 0) {
tm.tm_year = 0;
tm.tm_mon = 0;
tm.tm_mday = 1;
tm.tm_hour = 0;
tm.tm_min = 0;
tm.tm_sec = 0;
} else if (tm.tm_year > 255) {
tm.tm_year = 255;
tm.tm_mon = 11;
tm.tm_mday = 31;
tm.tm_hour = 23;
tm.tm_min = 59;
tm.tm_sec = 59;
}
buf[0] = tm.tm_year; buf[0] = tm.tm_year;
buf[1] = tm.tm_mon + 1; buf[1] = tm.tm_mon + 1;
buf[2] = tm.tm_mday; buf[2] = tm.tm_mday;
@ -1650,12 +1666,18 @@ void iso_datetime_17(unsigned char *buf, time_t t, int always_gmt)
tzoffset = 0; tzoffset = 0;
} }
sprintf((char*)&buf[0], "%04d", tm.tm_year + 1900); if (tm.tm_year <= -1900) {
sprintf((char*)&buf[4], "%02d", tm.tm_mon + 1); strcpy((char *) buf, "00010101000000");
sprintf((char*)&buf[6], "%02d", tm.tm_mday); } else if (tm.tm_year >= 8100) {
sprintf((char*)&buf[8], "%02d", tm.tm_hour); strcpy((char *) buf, "99991231235959");
sprintf((char*)&buf[10], "%02d", tm.tm_min); } else {
sprintf((char*)&buf[12], "%02d", MIN(59, tm.tm_sec)); sprintf((char*)&buf[0], "%04d", tm.tm_year + 1900);
sprintf((char*)&buf[4], "%02d", tm.tm_mon + 1);
sprintf((char*)&buf[6], "%02d", tm.tm_mday);
sprintf((char*)&buf[8], "%02d", tm.tm_hour);
sprintf((char*)&buf[10], "%02d", tm.tm_min);
sprintf((char*)&buf[12], "%02d", MIN(59, tm.tm_sec));
}
memcpy(&buf[14], "00", 2); memcpy(&buf[14], "00", 2);
buf[16] = tzoffset; buf[16] = tzoffset;