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Add helper function parseHashFormat[Opt] printHashFormat

Browse source 
Add hash format analogy of
parseHashTypeOpt, parseHashType, and printHashType.

Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
This commit is contained in:
Yueh-Shun Li 2023-10-09 11:03:16 +08:00
parent 231b0fca6d
commit 6b47635180
3 changed files with 65 additions and 0 deletions
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35
src/libutil/hash.cc
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@ -386,6 +386,41 @@ Hash compressHash(const Hash & hash, unsigned int newSize)
}
std::optional<HashFormat> parseHashFormatOpt(std::string_view hashFormatName)
{
if (hashFormatName == "base16") return HashFormat::Base16;
if (hashFormatName == "base32") return HashFormat::Base32;
if (hashFormatName == "base64") return HashFormat::Base64;
if (hashFormatName == "sri") return HashFormat::SRI;
return std::nullopt;
}
HashFormat parseHashFormat(std::string_view hashFormatName)
{
auto opt_f = parseHashFormatOpt(hashFormatName);
if (opt_f)
return *opt_f;
throw UsageError("unknown hash format '%1%', expect 'base16', 'base32', 'base64', or 'sri'", hashFormatName);
}
std::string_view printHashFormat(HashFormat HashFormat)
{
switch (HashFormat) {
case HashFormat::Base64:
return "base64";
case HashFormat::Base32:
return "base32";
case HashFormat::Base16:
return "base16";
case HashFormat::SRI:
return "sri";
default:
// illegal hash base enum value internally, as opposed to external input
// which should be validated with nice error message.
assert(false);
}
}
std::optional<HashType> parseHashTypeOpt(std::string_view s)
{
if (s == "md5") return htMD5;