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can do this purely on length. Also made prefix filesystem string for more accurate readings.

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Signed-off-by: VoR0220 <rj@erisindustries.com>
This commit is contained in:
VoR0220 2017-01-07 12:11:43 -06:00
parent 6d9020b3b8
commit 79dbd40096
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1 changed files with 16 additions and 27 deletions
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43
libsolidity/interface/CompilerStack.cpp
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@ -507,47 +507,36 @@ string CompilerStack::applyRemapping(string const& _path, string const& _context
return false;
return std::equal(_a.begin(), _a.end(), _b.begin());
};
// Try to find whether _a is a closer match for context _reference than _b
// Defaults to longest prefix in case of a tie.
auto isClosestContext = [](string const& _a, string const& _b, string const& _reference)
{
int a = _reference.compare(_a);
int b = _reference.compare(_b);
if (a == 0)
return true;
else if (b == 0)
return false;
else if (abs(a) == abs(b)) {
return a > 0;
}
return abs(a) < abs(b);
};
using filepath = boost::filesystem::path;
filepath context(_context);
size_t longestPrefix = 0;
size_t longestContext = 0;
string longestPrefixTarget;
string currentClosestContext;
string referenceContext = context.parent_path().generic_string();
for (auto const& redir: m_remappings)
{
filepath redirContext(redir.context);
// Skip if we already have a closer match.
if (longestPrefix > 0 && redir.prefix.length() < longestPrefix)
filepath redirPrefix(redir.prefix);
string contextFileString = redirContext.generic_string();
string prefixFileString = redirPrefix.generic_string();
// Skip if there is a prefix collision and the current context is closer
if (longestContext > 0 && contextFileString.length() < longestContext)
continue;
// Skip if redir.context is not a prefix of _context
if (!isPrefixOf(redirContext.generic_string(), _context))
if (!isPrefixOf(contextFileString, _context))
continue;
// Skip if we already have a closer match.
if (longestPrefix > 0 && prefixFileString.length() < longestPrefix)
continue;
// Skip if the prefix does not match.
if (!isPrefixOf(redir.prefix, _path))
if (!isPrefixOf(prefixFileString, _path))
continue;
// Skip if there is a prefix collision and the current context is closer
if (redir.prefix.length() == longestPrefix && !isClosestContext(redirContext.generic_string(), currentClosestContext, referenceContext))
continue;
currentClosestContext = redir.context;
longestPrefix = redir.prefix.length();
longestContext = contextFileString.length();
longestPrefix = prefixFileString.length();
longestPrefixTarget = redir.target;
}
string path = longestPrefixTarget;
path.append(_path.begin() + longestPrefix, _path.end());
return path;