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7 | 7 | * Portions Copyright (c) 1996-2000, PostgreSQL, Inc |
8 | 8 | * Portions Copyright (c) 1994, Regents of the University of California |
9 | 9 | * |
10 | | - * $Id: nabstime.h,v 1.26 2000/06/09 01:11:15 tgl Exp $ |
| 10 | + * $Id: nabstime.h,v 1.27 2000/11/18 05:41:45 tgl Exp $ |
11 | 11 | * |
12 | 12 | *------------------------------------------------------------------------- |
13 | 13 | */ |
14 | 14 | #ifndefNABSTIME_H |
15 | 15 | #defineNABSTIME_H |
16 | 16 |
|
| 17 | +#include<limits.h> |
17 | 18 | #include<time.h> |
18 | 19 |
|
19 | 20 | #include"fmgr.h" |
@@ -78,37 +79,25 @@ typedef TimeIntervalData *TimeInterval; |
78 | 79 | #defineCURRENT_ABSTIME ((AbsoluteTime) 0x7FFFFFFD)/* 2147483646 (2^31 - 2) */ |
79 | 80 | #defineNOEND_ABSTIME((AbsoluteTime) 0x7FFFFFFC)/* 2147483645 (2^31 - 3) */ |
80 | 81 | #defineBIG_ABSTIME((AbsoluteTime) 0x7FFFFFFB)/* 2147483644 (2^31 - 4) */ |
81 | | - |
82 | | -#if defined(_AIX) |
83 | | -/* |
84 | | - * AIX considers 2147483648 == -2147483648 (since they have the same bit |
85 | | - * representation) but uses a different sign sense in a comparison to |
86 | | - * these integer constants depending on whether the constant is signed |
87 | | - * or not! |
88 | | - */ |
89 | | -#defineNOSTART_ABSTIME ((AbsoluteTime) INT_MIN) |
90 | | -#else |
91 | | -#defineNOSTART_ABSTIME ((AbsoluteTime) 0x80000001)/* -2147483647 (- 2^31) */ |
92 | | -#endif/* _AIX */ |
| 82 | +#defineNOSTART_ABSTIME((AbsoluteTime) INT_MIN)/* -2147483648 */ |
93 | 83 |
|
94 | 84 | #defineINVALID_RELTIME ((RelativeTime) 0x7FFFFFFE)/* 2147483647 (2^31 - 1) */ |
95 | 85 |
|
96 | 86 | #defineAbsoluteTimeIsValid(time) \ |
97 | 87 | ((bool) ((time) != INVALID_ABSTIME)) |
98 | 88 |
|
| 89 | +/* |
| 90 | + * Because NOSTART_ABSTIME is defined as INT_MIN, there can't be any |
| 91 | + * AbsoluteTime values less than it. Therefore, we can code the test |
| 92 | + * "time > NOSTART_ABSTIME" as "time != NOSTART_ABSTIME", which avoids |
| 93 | + * compiler bugs on some platforms. --- tgl & az, 11/2000 |
| 94 | + */ |
99 | 95 | #defineAbsoluteTimeIsReal(time) \ |
100 | | -((bool) (((AbsoluteTime) time) < NOEND_ABSTIME && \ |
101 | | - ((AbsoluteTime) time) > NOSTART_ABSTIME)) |
| 96 | +((bool) (((AbsoluteTime)(time)) < NOEND_ABSTIME && \ |
| 97 | +((AbsoluteTime)(time)) != NOSTART_ABSTIME)) |
102 | 98 |
|
103 | 99 | #defineRelativeTimeIsValid(time) \ |
104 | | -((bool) (((RelativeTime) time) != INVALID_RELTIME)) |
105 | | - |
106 | | -/* |
107 | | - * getSystemTime |
108 | | - *Returns system time. |
109 | | - */ |
110 | | -#definegetSystemTime() \ |
111 | | -((time_t) (time(0l))) |
| 100 | +((bool) (((RelativeTime) (time)) != INVALID_RELTIME)) |
112 | 101 |
|
113 | 102 |
|
114 | 103 | /* |
|