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// file : libbuild2/functions-string.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <libbuild2/function.hxx>
#include <libbuild2/variable.hxx>
using namespace std;
namespace build2
{
static size_t
find_index (const strings& vs, value&& v, optional<names>&& fs)
{
bool ic (false);
if (fs)
{
for (name& f: *fs)
{
string s (convert<string> (move (f)));
if (s == "icase")
ic = true;
else
throw invalid_argument ("invalid flag '" + s + '\'');
}
}
auto i (find_if (vs.begin (), vs.end (),
[ic, y = convert<string> (move (v))] (const string& x)
{
return (ic ? icasecmp (x, y) : x.compare (y)) == 0;
}));
return i != vs.end () ? i - vs.begin () : vs.size ();
};
void
string_functions (function_map& m)
{
function_family f (m, "string");
f["string"] += [](string s) {return s;};
// @@ Shouldn't it concatenate elements into the single string?
// @@ Doesn't seem to be used so far. Can consider removing.
//
// f["string"] += [](strings v) {return v;};
// Compare ASCII strings ignoring case and returning the boolean value.
//
f["icasecmp"] += [](string x, string y)
{
return icasecmp (x, y) == 0;
};
f["icasecmp"] += [](string x, names y)
{
return icasecmp (x, convert<string> (move (y))) == 0;
};
f["icasecmp"] += [](names x, string y)
{
return icasecmp (convert<string> (move (x)), y) == 0;
};
f[".icasecmp"] += [](names x, names y)
{
return icasecmp (convert<string> (move (x)),
convert<string> (move (y))) == 0;
};
// Trim.
//
f["trim"] += [](string s)
{
return trim (move (s));
};
f[".trim"] += [](names s)
{
return names {name (trim (convert<string> (move (s))))};
};
// Convert ASCII strings into lower/upper case.
//
f["lcase"] += [](string s)
{
return lcase (move (s));
};
f[".lcase"] += [](names s)
{
return names {name (lcase (convert<string> (move (s))))};
};
f["ucase"] += [](string s)
{
return ucase (move (s));
};
f[".ucase"] += [](names s)
{
return names {name (ucase (convert<string> (move (s))))};
};
// $size(<strings>)
//
// Return the number of elements in the sequence.
//
f["size"] += [] (strings v) {return v.size ();};
// $size(<string>)
//
// Return the number of characters (bytes) in the string.
//
f["size"] += [] (string v) {return v.size ();};
// $sort(<strings> [, <flags>])
//
// Sort strings in ascending order.
//
// The following flags are supported:
//
// icase - sort ignoring case
//
// dedup - in addition to sorting also remove duplicates
//
f["sort"] += [](strings v, optional<names> fs)
{
bool ic (false);
bool dd (false);
if (fs)
{
for (name& f: *fs)
{
string s (convert<string> (move (f)));
if (s == "icase")
ic = true;
else if (s == "dedup")
dd = true;
else
throw invalid_argument ("invalid flag '" + s + '\'');
}
}
sort (v.begin (), v.end (),
[ic] (const string& x, const string& y)
{
return (ic ? icasecmp (x, y) : x.compare (y)) < 0;
});
if (dd)
v.erase (unique (v.begin(), v.end(),
[ic] (const string& x, const string& y)
{
return (ic ? icasecmp (x, y) : x.compare (y)) == 0;
}),
v.end ());
return v;
};
// $find(<strings>, <string>[, <flags>])
//
// Return true if the string sequence contains the specified string.
//
// The following flags are supported:
//
// icase - compare ignoring case
//
// See also $regex.find_{match,search}().
//
f["find"] += [](strings vs, value v, optional<names> fs)
{
return find_index (vs, move (v), move (fs)) != vs.size ();
};
// $find_index(<strings>, <string>[, <flags>])
//
// Return the index of the first element in the string sequence that
// is equal to the specified string or $size(<strings>) if none is
// found.
//
// The following flags are supported:
//
// icase - compare ignoring case
//
f["find_index"] += [](strings vs, value v, optional<names> fs)
{
return find_index (vs, move (v), move (fs));
};
// String-specific overloads from builtins.
//
function_family b (m, "builtin");
b[".concat"] += [](string l, string r) {l += r; return l;};
b[".concat"] += [](string l, names ur)
{
l += convert<string> (move (ur));
return l;
};
b[".concat"] += [](names ul, string r)
{
string l (convert<string> (move (ul)));
l += r;
return l;
};
}
}
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