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string2Int(): Return std::optional

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This commit is contained in:
Eelco Dolstra 2021-01-08 12:22:21 +01:00
parent 29a445840a
commit 6548b89cc4
17 changed files with 82 additions and 69 deletions
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11
src/libstore/profiles.cc
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@ -21,9 +21,8 @@ static std::optional<GenerationNumber> parseName(const string & profileName, con
string s = string(name, profileName.size() + 1);
string::size_type p = s.find("-link");
if (p == string::npos) return {};
unsigned int n;
if (string2Int(string(s, 0, p), n) && n >= 0)
return n;
if (auto n = string2Int<unsigned int>(s.substr(0, p)))
return *n;
else
return {};
}
@ -214,12 +213,12 @@ void deleteGenerationsOlderThan(const Path & profile, const string & timeSpec, b
{
time_t curTime = time(0);
string strDays = string(timeSpec, 0, timeSpec.size() - 1);
int days;
auto days = string2Int<int>(strDays);
if (!string2Int(strDays, days) || days < 1)
if (!days || *days < 1)
throw Error("invalid number of days specifier '%1%'", timeSpec);
time_t oldTime = curTime - days * 24 * 3600;
time_t oldTime = curTime - *days * 24 * 3600;
deleteGenerationsOlderThan(profile, oldTime, dryRun);
}