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//===- Path.cpp -----------------------------------------------------------===//
//
// The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <mcld/Config/Config.h>
#include <mcld/Support/FileSystem.h>
#include <mcld/Support/Path.h>
#include <llvm/ADT/StringRef.h>
#include <locale>
#include <string.h>
#include <istream>
#include <ostream>
using namespace mcld;
using namespace mcld::sys::fs;
//===--------------------------------------------------------------------===//
// Helper
//===--------------------------------------------------------------------===//
namespace {
#if defined(MCLD_ON_WIN32)
bool is_separator(char value)
{
return (value == separator || value == preferred_separator);
}
const Path::StringType separator_str("/");
#else
bool is_separator(char value)
{
return (value == separator);
}
const Path::StringType separator_str("/");
#endif
} // anonymous namespace
//===--------------------------------------------------------------------===//
// Path
//===--------------------------------------------------------------------===//
Path::Path()
: m_PathName() {
}
Path::Path(const Path::ValueType* s )
: m_PathName(s) {
}
Path::Path(const Path::StringType &s )
: m_PathName(s) {
}
Path::Path(const Path& pCopy)
: m_PathName(pCopy.m_PathName) {
}
Path::~Path()
{
}
bool Path::isFromRoot() const
{
if (m_PathName.empty())
return false;
return (separator == m_PathName[0]);
}
bool Path::isFromPWD() const
{
if (2 > m_PathName.size())
return false;
return ('.' == m_PathName[0] && separator == m_PathName[1]);
}
Path& Path::assign(const Path::StringType &s)
{
m_PathName.assign(s);
return *this;
}
Path& Path::assign(const Path::ValueType* s, unsigned int length)
{
if (0 == s || 0 == length)
assert(0 && "assign a null or empty string to Path");
m_PathName.assign(s, length);
return *this;
}
//a,/b a/,b a/,b/ a,b is a/b
Path& Path::append(const Path& pPath)
{
//first path is a/,second path is /b
if(m_PathName[m_PathName.length()-1] == separator &&
pPath.native()[0] == separator) {
unsigned int old_size = m_PathName.size()-1;
unsigned int new_size = old_size + pPath.native().size();
m_PathName.resize(new_size);
strcpy(const_cast<ValueType*>(m_PathName.data()+old_size), pPath.native().data());
}
//first path is a,second path is b
else if(this->native()[this->native().size()-1] != separator &&
pPath.native()[0] != separator) {
m_PathName.append(separator_str);
m_PathName.append(pPath.native());
}
// a/,b or a,/b just append
else {
m_PathName.append(pPath.native());
}
return *this;
}
bool Path::empty() const
{
return m_PathName.empty();
}
Path::StringType Path::generic_string() const
{
StringType result = m_PathName;
detail::canonicalize(result);
return result;
}
bool Path::canonicalize()
{
return detail::canonicalize(m_PathName);
}
Path::StringType::size_type Path::m_append_separator_if_needed()
{
#if defined(MCLD_ON_WIN32)
// On Windows platform, path can not append separator.
return 0;
#endif
StringType::value_type last_char = m_PathName[m_PathName.size() - 1];
if (!m_PathName.empty() &&
!is_separator(last_char)) {
StringType::size_type tmp(m_PathName.size());
m_PathName += separator_str;
return tmp;
}
return 0;
}
void Path::m_erase_redundant_separator(Path::StringType::size_type pSepPos)
{
size_t begin=pSepPos;
// skip '/' or '\\'
while(separator == m_PathName[pSepPos]) {
#if defined(MCLD_ON_WIN32)
pSepPos += 2;
#else
++pSepPos;
#endif
}
if(begin!=pSepPos)
m_PathName.erase(begin+1,pSepPos-begin-1);
}
Path Path::parent_path() const
{
size_t end_pos = m_PathName.find_last_of(separator);
if (end_pos != StringType::npos)
return Path(m_PathName.substr(0, end_pos));
return Path();
}
Path Path::filename() const
{
size_t pos = m_PathName.find_last_of(separator);
if (pos != StringType::npos) {
++pos;
return Path(m_PathName.substr(pos));
}
return Path(*this);
}
Path Path::stem() const
{
size_t begin_pos = m_PathName.find_last_of(separator)+1;
size_t end_pos = m_PathName.find_last_of(dot);
Path result_path(m_PathName.substr(begin_pos, end_pos - begin_pos));
return result_path;
}
Path Path::extension() const
{
size_t pos = m_PathName.find_last_of('.');
if (pos == StringType::npos)
return Path();
return Path(m_PathName.substr(pos));
}
//===--------------------------------------------------------------------===//
// non-member functions
//===--------------------------------------------------------------------===//
bool mcld::sys::fs::operator==(const Path& pLHS,const Path& pRHS)
{
return (pLHS.generic_string()==pRHS.generic_string());
}
bool mcld::sys::fs::operator!=(const Path& pLHS,const Path& pRHS)
{
return !(pLHS==pRHS);
}
Path mcld::sys::fs::operator+(const Path& pLHS, const Path& pRHS)
{
mcld::sys::fs::Path result = pLHS;
result.append(pRHS);
return result;
}
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