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time: rearrange+pack vtm and time_object structs

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struct time_object shrinks from 88 to 46 bytes on my 64-bit system.

* configure.in: use -Wno-packed-bitfield-compat for GCC 4.4+
  use __attribute__((packed)) if available
* timev.h: shrink and pack struct vtm
* time.c: pack struct time_object and adjust/introduce helpers
  [ruby-core:60794]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45155 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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normal 2014-02-24 03:38:14 +00:00
parent ba5ed845b3
commit b2f3063cae
4 changed files with 74 additions and 37 deletions
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18
timev.h
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@ -3,18 +3,18 @@
struct vtm {
VALUE year; /* 2000 for example. Integer. */
int mon; /* 1..12 */
int mday; /* 1..31 */
int hour; /* 0..23 */
int min; /* 0..59 */
int sec; /* 0..60 */
VALUE subsecx; /* 0 <= subsecx < TIME_SCALE. possibly Rational. */
VALUE utc_offset; /* -3600 as -01:00 for example. possibly Rational. */
int wday; /* 0:Sunday, 1:Monday, ..., 6:Saturday */
int yday; /* 1..366 */
int isdst; /* 0:StandardTime 1:DayLightSavingTime */
const char *zone; /* "JST", "EST", "EDT", etc. */
};
uint16_t yday:9; /* 1..366 */
uint8_t mon:4; /* 1..12 */
uint8_t mday:5; /* 1..31 */
uint8_t hour:5; /* 0..23 */
uint8_t min:6; /* 0..59 */
uint8_t sec:6; /* 0..60 */
uint8_t wday:3; /* 0:Sunday, 1:Monday, ..., 6:Saturday 7:init */
uint8_t isdst:2; /* 0:StandardTime 1:DayLightSavingTime 3:init */
} PACKED_STRUCT;
#define TIME_SCALE 1000000000