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fs/Traits: implement GetBase/GetParent/Build using templates

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This commit is contained in:
Denis Krjuchkov
2013-12-05 04:47:07 +06:00
parent 83e6e3e31f
commit 289fdcc52b
2 changed files with 88 additions and 22 deletions
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85
src/fs/Traits.cxx
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@@ -22,24 +22,25 @@
#include <string.h>
PathTraitsFS::string
PathTraitsFS::Build(PathTraitsFS::const_pointer a, size_t a_size,
PathTraitsFS::const_pointer b, size_t b_size)
template<typename Traits>
typename Traits::string
BuildPathImpl(typename Traits::const_pointer a, size_t a_size,
typename Traits::const_pointer b, size_t b_size)
{
assert(a != nullptr);
assert(b != nullptr);
if (a_size == 0)
return string(b, b_size);
return typename Traits::string(b, b_size);
if (b_size == 0)
return string(a, a_size);
return typename Traits::string(a, a_size);
string result(a, a_size);
typename Traits::string result(a, a_size);
if (!IsSeparator(a[a_size - 1]))
result.push_back(SEPARATOR);
if (!Traits::IsSeparator(a[a_size - 1]))
result.push_back(Traits::SEPARATOR);
if (IsSeparator(b[0]))
if (Traits::IsSeparator(b[0]))
result.append(b + 1, b_size - 1);
else
result.append(b, b_size);
@@ -47,26 +48,66 @@ PathTraitsFS::Build(PathTraitsFS::const_pointer a, size_t a_size,
return result;
}
PathTraitsUTF8::const_pointer
PathTraitsUTF8::GetBase(PathTraitsUTF8::const_pointer p)
template<typename Traits>
typename Traits::const_pointer
GetBasePathImpl(typename Traits::const_pointer p)
{
assert(p != nullptr);
const char *slash = strrchr(p, SEPARATOR);
return slash != nullptr
? slash + 1
typename Traits::const_pointer sep = Traits::FindLastSeparator(p);
return sep != nullptr
? sep + 1
: p;
}
template<typename Traits>
typename Traits::string
GetParentPathImpl(typename Traits::const_pointer p)
{
assert(p != nullptr);
typename Traits::const_pointer sep = Traits::FindLastSeparator(p);
if (sep == nullptr)
return typename Traits::string(".");
if (sep == p)
return typename Traits::string(p, p + 1);
return typename Traits::string(p, sep);
}
PathTraitsFS::string
PathTraitsFS::Build(PathTraitsFS::const_pointer a, size_t a_size,
PathTraitsFS::const_pointer b, size_t b_size)
{
return BuildPathImpl<PathTraitsFS>(a, a_size, b, b_size);
}
PathTraitsFS::const_pointer
PathTraitsFS::GetBase(PathTraitsFS::const_pointer p)
{
return GetBasePathImpl<PathTraitsFS>(p);
}
PathTraitsFS::string
PathTraitsFS::GetParent(PathTraitsFS::const_pointer p)
{
return GetParentPathImpl<PathTraitsFS>(p);
}
PathTraitsUTF8::string
PathTraitsUTF8::Build(PathTraitsUTF8::const_pointer a, size_t a_size,
PathTraitsUTF8::const_pointer b, size_t b_size)
{
return BuildPathImpl<PathTraitsUTF8>(a, a_size, b, b_size);
}
PathTraitsUTF8::const_pointer
PathTraitsUTF8::GetBase(PathTraitsUTF8::const_pointer p)
{
return GetBasePathImpl<PathTraitsUTF8>(p);
}
PathTraitsUTF8::string
PathTraitsUTF8::GetParent(PathTraitsUTF8::const_pointer p)
{
assert(p != nullptr);
const char *slash = strrchr(p, SEPARATOR);
if (slash == nullptr)
return std::string(".");
if (slash == p)
return std::string(p, p + 1);
return std::string(p, slash);
return GetParentPathImpl<PathTraitsUTF8>(p);
}