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#define XERR
#include "process.ih"
string Process::pathTo(string const &dest, string const &ihFile)
{
if (dest.front() == '/') // dest is absolute: use as-is
return dest;
// find the canonical dirnames
string spch = canonical(dest);
string ih = canonical(ihFile);
size_t from = 0;
size_t toSPCH = 0;
size_t toIH = 0;
while (true)
{
toSPCH = spch.find('/', from);
toIH = ih.find('/', from);
if (
toSPCH != toIH
or toSPCH == string::npos
or spch.substr(0, toSPCH) != ih.substr(0, toIH)
)
break;
from = toSPCH + 1;
}
ih.erase(0, from); // remove the equal prefixes
spch.erase(0, from);
for ( // insert steps to the parent
size_t begin = 0, end = count(ihFile.begin(), ihFile.end(), '/');
begin != end;
++begin
)
spch.insert(0, "../");
return spch;
}
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