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Protect assert against overflow

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Fixes #860
This commit is contained in:
Howard Hinnant
2024-12-06 18:34:35 -05:00
parent f079e3568c
commit 28b7b23252
1 changed files with 4 additions and 2 deletions
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6
include/date/ptz.h
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@@ -349,10 +349,11 @@ time_zone::contant_offset() const
using date::January; using date::January;
using date::December; using date::December;
using date::last; using date::last;
using date::days;
using std::chrono::minutes; using std::chrono::minutes;
sys_info r; sys_info r;
r.begin = sys_days{year::min()/January/1}; r.begin = sys_days{year::min()/January/1};
r.end = sys_days{year::max()/December/last}; r.end = sys_days{year::max()/December/last} + days{1} - std::chrono::seconds{1};
if (std_abbrev_.size() > 0) if (std_abbrev_.size() > 0)
{ {
r.abbrev = std_abbrev_; r.abbrev = std_abbrev_;
@@ -510,7 +511,8 @@ time_zone::get_info(date::sys_time<Duration> st) const
} }
else else
r = contant_offset(); r = contant_offset();
assert(r.begin <= st && st < r.end); using seconds = std::chrono::seconds;
assert(r.begin <= floor<seconds>(st) && floor<seconds>(st) <= r.end);
return r; return r;
} }