Thanks to Paul and Ken for the feedback on zdump.c. Here's the next iteration; these changes are relative to the code now available via ftp. --ado ------- zdump.c ------- *** /tmp/geta16007 Thu Dec 30 08:46:20 2004 --- /tmp/getb16007 Thu Dec 30 08:46:20 2004 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zdump.c 7.57"; /* ** This code has been made independent of the rest of the time --- 1,4 ---- ! static char elsieid[] = "@(#)zdump.c 7.59"; /* ** This code has been made independent of the rest of the time *************** *** 151,156 **** --- 151,157 ---- static time_t hunt P((char * name, time_t lot, time_t hit)); static void setabsolutes(); static void show P((char * zone, time_t t, int v)); + static const char * tformat P((void)); static time_t yeartot P((long y)); int *************** *** 469,475 **** if (v) { tmp = gmtime(&t); if (tmp == NULL) { ! (void) printf("%g", (double) t); } else { dumptime(tmp); (void) printf(" UTC"); --- 470,476 ---- if (v) { tmp = gmtime(&t); if (tmp == NULL) { ! (void) printf(tformat(), t); } else { dumptime(tmp); (void) printf(" UTC"); *************** *** 504,509 **** --- 505,537 ---- return (result == NULL) ? &nada : result; } + /* + ** The code below can fail on certain theoretical systems; + ** it works on all known real-world systems as of 2004-12-30. + */ + + static const char * + tformat() + { + if (0.5 == (time_t) 0.5) { /* floating */ + if (sizeof (time_t) > sizeof (double)) + return "%Lg"; + return "%g"; + } + if (0 > (time_t) -1) { /* signed */ + if (sizeof (time_t) > sizeof (long)) + return "%lld"; + if (sizeof (time_t) > sizeof (int)) + return "%ld"; + return "%d"; + } + if (sizeof (time_t) > sizeof (unsigned long)) + return "%llu"; + if (sizeof (time_t) > sizeof (unsigned int)) + return "%lu"; + return "%u"; + } + static void dumptime(timeptr) register const struct tm * timeptr;