diff options
Diffstat (limited to 'timezone/zdump.c')
| -rw-r--r-- | timezone/zdump.c | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/timezone/zdump.c b/timezone/zdump.c index d525da1bae..ae4d286b12 100644 --- a/timezone/zdump.c +++ b/timezone/zdump.c @@ -1,4 +1,4 @@ -static char elsieid[] = "@(#)zdump.c 7.74"; +static char elsieid[] = "@(#)zdump.c 8.2"; /* ** This code has been made independent of the rest of the time @@ -15,7 +15,7 @@ static char elsieid[] = "@(#)zdump.c 7.74"; #include "ctype.h" /* for isalpha et al. */ #ifndef isascii #define isascii(x) 1 -#endif +#endif /* !defined isascii */ #ifndef ZDUMP_LO_YEAR #define ZDUMP_LO_YEAR (-500) @@ -130,11 +130,7 @@ static char elsieid[] = "@(#)zdump.c 7.74"; #endif /* !defined TZ_DOMAIN */ #ifndef P -#ifdef __STDC__ #define P(x) x -#else /* !defined __STDC__ */ -#define P(x) () -#endif /* !defined __STDC__ */ #endif /* !defined P */ extern char ** environ; @@ -418,14 +414,21 @@ _("%s: use of -v on system with floating time_t other than float or double\n"), } } else if (0 > (time_t) -1) { /* - ** time_t is signed. + ** time_t is signed. Assume overflow wraps around. */ - register time_t hibit; + time_t t = 0; + time_t t1 = 1; - for (hibit = 1; (hibit * 2) != 0; hibit *= 2) - continue; - absolute_min_time = hibit; - absolute_max_time = -(hibit + 1); + while (t < t1) { + t = t1; + t1 = 2 * t1 + 1; + } + + absolute_max_time = t; + t = -t; + absolute_min_time = t - 1; + if (t < absolute_min_time) + absolute_min_time = t; } else { /* ** time_t is unsigned. @@ -468,10 +471,7 @@ const long y; } static time_t -hunt(name, lot, hit) -char * name; -time_t lot; -time_t hit; +hunt(char *name, time_t lot, time_t hit) { time_t t; long diff; @@ -541,10 +541,7 @@ struct tm * oldp; } static void -show(zone, t, v) -char * zone; -time_t t; -int v; +show(char *zone, time_t t, int v) { register struct tm * tmp; |