1# $NetBSD: varmod-gmtime.mk,v 1.10 2021/01/19 05:26:34 rillig Exp $
2#
3# Tests for the :gmtime variable modifier, which formats a timestamp
4# using strftime(3) in UTC.
5
6.if ${TZ:Uundefined} != "undefined"	# see unit-tests/Makefile
7.  error
8.endif
9
10# Test for the default time format, %c.  Since the time always varies, it's
11# only possible to check for the general format here.  The names of the
12# month and weekday are always in English, independent from the locale.
13# Example: Thu Oct 29 18:56:41 2020
14.if ${:U:gmtime:tW:M??? ??? ?? ??\:??\:?? ????} == ""
15.  error
16.endif
17
18
19# modifier name too short, falling back to the SysV modifier.
20.if ${%Y:L:gmtim=1593536400} != "%Y"
21.  error
22.endif
23
24
25# 2020-07-01T00:00:00Z
26.if ${%Y:L:gmtime=1593536400} != "2020"
27.  error
28.endif
29
30
31# modifier name too long, falling back to the SysV modifier.
32.if ${%Y:L:gmtimer=1593536400} != "%Y"
33.  error
34.endif
35
36
37# If the modifier name is not matched exactly, fall back to the
38# :from=to modifier.
39.if ${gmtime:L:gm%=local%} != "localtime"
40.  error
41.endif
42
43
44# As of 2020-08-16, it is not possible to pass the seconds via a
45# variable expression.  This is because parsing of the :gmtime
46# modifier stops at the '$' and returns to ApplyModifiers.
47#
48# There, a colon would be skipped but not a dollar.
49# Parsing therefore continues at the '$' of the ${:U159...}, looking
50# for an ordinary variable modifier.
51#
52# At this point, the ${:U} is expanded and interpreted as a variable
53# modifier, which results in the error message "Unknown modifier '1'".
54#
55# If ApplyModifier_Gmtime were to pass its argument through
56# ParseModifierPart, this would work.
57.if ${%Y:L:gmtime=${:U1593536400}} != "mtime=11593536400}"
58.  error
59.endif
60
61
62# Before var.c 1.631 from 2020-10-31 21:40:20, it was possible to pass
63# negative time stamps to the :gmtime modifier, resulting in dates before
64# 1970.  Going back 50 years in the past is not a practical use case for
65# make.  Therefore, since var.c 1.631, negative time stamps produce a
66# parse error.
67.if ${:L:gmtime=-1} != ""
68.  error
69.else
70.  error
71.endif
72
73
74# Spaces were allowed before var.c 1.631 from 2020-10-31 21:40:20, not
75# because it would make sense but just as a side-effect from using strtoul.
76.if ${:L:gmtime= 1} != ""
77.  error
78.endif
79
80
81# 0 means now; this differs from GNode.mtime, where a 0 means nonexistent.
82# Since "now" constantly changes, the strongest possible test is to match the
83# resulting pattern.
84.if !${:L:gmtime=0:tW:M??? ??? ?? ??\:??\:?? 20??}
85.  error
86.endif
87
88
89.if ${:L:gmtime=1} != "Thu Jan  1 00:00:01 1970"
90.  error
91.endif
92
93
94# INT32_MAX
95.if ${:L:gmtime=2147483647} != "Tue Jan 19 03:14:07 2038"
96.  error
97.endif
98
99
100.if ${:L:gmtime=2147483648} == "Tue Jan 19 03:14:08 2038"
101# All systems that have unsigned time_t or 64-bit time_t.
102.elif ${:L:gmtime=2147483648} == "Fri Dec 13 20:45:52 1901"
103# FreeBSD-12.0-i386 still has 32-bit signed time_t, see
104# sys/x86/include/_types.h, __LP64__.
105#
106# Linux on 32-bit systems may still have 32-bit signed time_t, see
107# sysdeps/unix/sysv/linux/generic/bits/typesizes.h, __TIMESIZE.
108.else
109.  error
110.endif
111
112
113# Integer overflow, at least before var.c 1.631 from 2020-10-31.
114# Because this modifier is implemented using strtoul, the parsed time was
115# ULONG_MAX, which got converted to -1.  This resulted in a time stamp of
116# the second before 1970.
117#
118# Since var.c 1.631, the overflow is detected and produces a parse error.
119.if ${:L:gmtime=10000000000000000000000000000000} != ""
120.  error
121.else
122.  error
123.endif
124
125# Before var.c 1.631 from 2020-10-31, there was no error handling while
126# parsing the :gmtime modifier, thus no error message was printed.  Parsing
127# stopped after the '=', and the remaining string was parsed for more variable
128# modifiers.  Because of the unknown modifier 'e' from the 'error', the whole
129# variable value was discarded and thus not printed.
130.if ${:L:gmtime=error} != ""
131.  error
132.else
133.  error
134.endif
135
136
137all:
138