* time.c: new method `gmtoff', `gmt_offset' and `utc_offset'.

(time_utc_offset): new function.
(Init_Time): bind above methods to `time_utc_offset'.

* time.c: 64bit time_t support.
(time_s_at): use NUM2LONG instead of NUM2INT for tv_sec.
(time_arg): initialize tm_isdst correctly.
use long to initialize tm_year.
(search_time_t): renamed from `make_time_t'.
(make_time_t): call `timegm' and `mktime' instead of `search_time_t'
if availabe.
(time_to_i): use LONG2NUM instead of INT2NUM.
(time_localtime): check localtime failure.
(time_gmtime): check gmtime failure.
(time_year): use LONG2NUM instead of INT2FIX.
(time_to_a): use long for tm_year.
(time_dump): check tm_year which is not representable with 17bit.
(time_load): initialize tm_isdst.

* configure.in: check existence of `mktime' and `timegm'.
check existence of tm_gmtoff field of struct tm.
fix negative time_t for 64bit time_t.

* missing/strftime.c: fix overflow by tm_year + 1900.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1912 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 2 deletions

diff --git a/configure.in b/configure.in
index 4bba1828c6..b70f95d722 100644
--- a/configure.in
+++ b/configure.in
@@ -300,8 +300,17 @@ AC_CHECK_FUNCS(fmod killpg drand48 random wait4 waitpid syscall chroot\
 	      setitimer setruid seteuid setreuid setresuid setproctitle\
 	      setrgid setegid setregid setresgid pause lchown lchmod\
 	      getpgrp setpgrp getpgid setpgid getgroups getpriority getrlimit\
-	      dlopen sigprocmask sigaction _setjmp setsid telldir seekdir fchmod)
+	      dlopen sigprocmask sigaction _setjmp setsid telldir seekdir fchmod\
+	      mktime timegm)
 AC_STRUCT_TIMEZONE
+AC_CACHE_CHECK(for struct tm.tm_gmtoff, rb_cv_member_struct_tm_tm_gmtoff,
+  [AC_TRY_COMPILE([#include <time.h>],
+    [struct tm t; t.tm_gmtoff = 3600;],
+  [rb_cv_member_struct_tm_tm_gmtoff=yes],
+  [rb_cv_member_struct_tm_tm_gmtoff=no])])
+if test "$rb_cv_member_struct_tm_tm_gmtoff" = yes; then
+  AC_DEFINE(HAVE_STRUCT_TM_TM_GMTOFF)
+fi
 AC_CACHE_CHECK(for external int daylight, rb_cv_have_daylight,
   [AC_TRY_LINK([#include <time.h>
   int i;],
@@ -337,7 +346,7 @@ main()
    struct tm *tm;
 
    check(gmtime(&t), 69, 12, 31, 23, 59);
-   t = -0x80000000;
+   t = ~(time_t)0 << 31;
    check(gmtime(&t), 1, 12, 13, 20, 52);
    return 0;
 }