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remove longest common prefix from fsname. closes #38

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This commit is contained in:
Antonio SJ Musumeci 2015-01-22 16:30:12 -05:00
parent 90b0fcd5f5
commit 5dd072962b
3 changed files with 74 additions and 3 deletions
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58
src/str.cpp
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@ -46,15 +46,69 @@ namespace str
string
join(const vector<string> &vec,
const size_t substridx,
const char sep)
{
if(vec.empty())
return string();
string rv = vec[0];
string rv = vec[0].substr(substridx);
for(size_t i = 1; i < vec.size(); i++)
rv += sep + vec[i];
rv += sep + vec[i].substr(substridx);
return rv;
}
string
join(const vector<string> &vec,
const char sep)
{
return str::join(vec,0,sep);
}
size_t
longest_common_prefix_index(const vector<string> &vec)
{
if(vec.empty())
return string::npos;
for(size_t n = 0; n < vec[0].size(); n++)
{
char chr = vec[0][n];
for(size_t i = 1; i < vec.size(); i++)
{
if(n >= vec[i].size())
return n;
if(vec[i][n] != chr)
return n;
}
}
return string::npos;
}
string
longest_common_prefix(const vector<string> &vec)
{
size_t idx;
idx = longest_common_prefix_index(vec);
if(idx != string::npos)
return vec[0].substr(0,idx);
return string();
}
string
remove_common_prefix_and_join(const vector<string> &vec,
const char sep)
{
size_t idx;
idx = str::longest_common_prefix_index(vec);
if(idx == string::npos)
idx = 0;
return str::join(vec,idx,sep);
}
}