libcxx initial import
llvm-svn: 103490
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 3e519524c118651123eecf60c2bbc5d65ad9bac3
diff --git a/src/strstream.cpp b/src/strstream.cpp
new file mode 100644
index 0000000..d3d257e
--- /dev/null
+++ b/src/strstream.cpp
@@ -0,0 +1,363 @@
+//===------------------------ strstream.cpp -------------------------------===//
+//
+// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "strstream"
+#include "algorithm"
+#include "climits"
+#include "cstring"
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+strstreambuf::strstreambuf(streamsize __alsize)
+ : __strmode_(__dynamic),
+ __alsize_(__alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+}
+
+strstreambuf::strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*))
+ : __strmode_(__dynamic),
+ __alsize_(__default_alsize),
+ __palloc_(__palloc),
+ __pfree_(__pfree)
+{
+}
+
+void
+strstreambuf::__init(char* __gnext, streamsize __n, char* __pbeg)
+{
+ if (__n == 0)
+ __n = strlen(__gnext);
+ else if (__n < 0)
+ __n = INT_MAX;
+ if (__pbeg == nullptr)
+ setg(__gnext, __gnext, __gnext + __n);
+ else
+ {
+ setg(__gnext, __gnext, __pbeg);
+ setp(__pbeg, __pbeg + __n);
+ }
+}
+
+strstreambuf::strstreambuf(char* __gnext, streamsize __n, char* __pbeg)
+ : __strmode_(),
+ __alsize_(__default_alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+ __init(__gnext, __n, __pbeg);
+}
+
+strstreambuf::strstreambuf(const char* __gnext, streamsize __n)
+ : __strmode_(__constant),
+ __alsize_(__default_alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+ __init((char*)__gnext, __n, nullptr);
+}
+
+strstreambuf::strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg)
+ : __strmode_(),
+ __alsize_(__default_alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+ __init((char*)__gnext, __n, (char*)__pbeg);
+}
+
+strstreambuf::strstreambuf(const signed char* __gnext, streamsize __n)
+ : __strmode_(__constant),
+ __alsize_(__default_alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+ __init((char*)__gnext, __n, nullptr);
+}
+
+strstreambuf::strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg)
+ : __strmode_(),
+ __alsize_(__default_alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+ __init((char*)__gnext, __n, (char*)__pbeg);
+}
+
+strstreambuf::strstreambuf(const unsigned char* __gnext, streamsize __n)
+ : __strmode_(__constant),
+ __alsize_(__default_alsize),
+ __palloc_(nullptr),
+ __pfree_(nullptr)
+{
+ __init((char*)__gnext, __n, nullptr);
+}
+
+#ifdef _LIBCPP_MOVE
+
+strstreambuf::strstreambuf(strstreambuf&& __rhs)
+ : streambuf(__rhs),
+ __strmode_(__rhs.__strmode_),
+ __alsize_(__rhs.__alsize_),
+ __palloc_(__rhs.__palloc_),
+ __pfree_(__rhs.__pfree_)
+{
+ __rhs.setg(nullptr, nullptr, nullptr);
+ __rhs.setp(nullptr, nullptr);
+}
+
+strstreambuf&
+strstreambuf::operator=(strstreambuf&& __rhs)
+{
+ if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0)
+ {
+ if (__pfree_)
+ __pfree_(eback());
+ else
+ delete [] eback();
+ }
+ streambuf::operator=(__rhs);
+ __strmode_ = __rhs.__strmode_;
+ __alsize_ = __rhs.__alsize_;
+ __palloc_ = __rhs.__palloc_;
+ __pfree_ = __rhs.__pfree_;
+ __rhs.setg(nullptr, nullptr, nullptr);
+ __rhs.setp(nullptr, nullptr);
+}
+
+#endif
+
+strstreambuf::~strstreambuf()
+{
+ if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0)
+ {
+ if (__pfree_)
+ __pfree_(eback());
+ else
+ delete [] eback();
+ }
+}
+
+void
+strstreambuf::swap(strstreambuf& __rhs)
+{
+ streambuf::swap(__rhs);
+ _STD::swap(__strmode_, __rhs.__strmode_);
+ _STD::swap(__alsize_, __rhs.__alsize_);
+ _STD::swap(__palloc_, __rhs.__palloc_);
+ _STD::swap(__pfree_, __rhs.__pfree_);
+}
+
+void
+strstreambuf::freeze(bool __freezefl)
+{
+ if (__strmode_ & __dynamic)
+ {
+ if (__freezefl)
+ __strmode_ |= __frozen;
+ else
+ __strmode_ &= ~__frozen;
+ }
+}
+
+char*
+strstreambuf::str()
+{
+ if (__strmode_ & __dynamic)
+ __strmode_ |= __frozen;
+ return eback();
+}
+
+int
+strstreambuf::pcount() const
+{
+ return static_cast<int>(pptr() - pbase());
+}
+
+strstreambuf::int_type
+strstreambuf::overflow(int_type __c)
+{
+ if (__c == EOF)
+ return int_type(0);
+ if (pptr() == epptr())
+ {
+ if ((__strmode_ & __dynamic) == 0 || (__strmode_ & __frozen) != 0)
+ return int_type(EOF);
+ streamsize old_size = (epptr() ? epptr() : egptr()) - eback();
+ streamsize new_size = max<streamsize>(__alsize_, 2*old_size);
+ char* buf = nullptr;
+ if (__palloc_)
+ buf = static_cast<char*>(__palloc_(new_size));
+ else
+ buf = new char[new_size];
+ if (buf == nullptr)
+ return int_type(EOF);
+ memcpy(buf, eback(), old_size);
+ ptrdiff_t ninp = gptr() - eback();
+ ptrdiff_t einp = egptr() - eback();
+ ptrdiff_t nout = pptr() - pbase();
+ ptrdiff_t eout = epptr() - pbase();
+ if (__strmode_ & __allocated)
+ {
+ if (__pfree_)
+ __pfree_(eback());
+ else
+ delete [] eback();
+ }
+ setg(buf, buf + ninp, buf + einp);
+ setp(buf + einp, buf + einp + eout);
+ pbump(nout);
+ __strmode_ |= __allocated;
+ }
+ *pptr() = static_cast<char>(__c);
+ pbump(1);
+ return int_type((unsigned char)__c);
+}
+
+strstreambuf::int_type
+strstreambuf::pbackfail(int_type __c)
+{
+ if (eback() == gptr())
+ return EOF;
+ if (__c == EOF)
+ {
+ gbump(-1);
+ return int_type(0);
+ }
+ if (__strmode_ & __constant)
+ {
+ if (gptr()[-1] == static_cast<char>(__c))
+ {
+ gbump(-1);
+ return __c;
+ }
+ return EOF;
+ }
+ gbump(-1);
+ *gptr() = static_cast<char>(__c);
+ return __c;
+}
+
+strstreambuf::int_type
+strstreambuf::underflow()
+{
+ if (gptr() == egptr())
+ {
+ if (egptr() >= pptr())
+ return EOF;
+ setg(eback(), gptr(), pptr());
+ }
+ return int_type((unsigned char)*gptr());
+}
+
+
+strstreambuf::pos_type
+strstreambuf::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which)
+{
+ off_type __p(-1);
+ bool pos_in = __which & ios::in;
+ bool pos_out = __which & ios::out;
+ bool legal = false;
+ switch (__way)
+ {
+ case ios::beg:
+ case ios::end:
+ if (pos_in || pos_out)
+ legal = true;
+ break;
+ case ios::cur:
+ if (pos_in != pos_out)
+ legal = true;
+ break;
+ }
+ if (pos_in && gptr() == nullptr)
+ legal = false;
+ if (pos_out && pptr() == nullptr)
+ legal = false;
+ if (legal)
+ {
+ off_type newoff;
+ char* seekhigh = epptr() ? epptr() : egptr();
+ switch (__way)
+ {
+ case ios::beg:
+ newoff = 0;
+ break;
+ case ios::cur:
+ newoff = (pos_in ? gptr() : pptr()) - eback();
+ break;
+ case ios::end:
+ newoff = seekhigh - eback();
+ break;
+ }
+ newoff += __off;
+ if (0 <= newoff && newoff <= seekhigh - eback())
+ {
+ char* newpos = eback() + newoff;
+ if (pos_in)
+ setg(eback(), newpos, max(newpos, egptr()));
+ if (pos_out)
+ {
+ // min(pbase, newpos), newpos, epptr()
+ __off = epptr() - newpos;
+ setp(min(pbase(), newpos), epptr());
+ pbump(static_cast<int>((epptr() - pbase()) - __off));
+ }
+ __p = newoff;
+ }
+ }
+ return pos_type(__p);
+}
+
+
+strstreambuf::pos_type
+strstreambuf::seekpos(pos_type __sp, ios_base::openmode __which)
+{
+ off_type __p(-1);
+ bool pos_in = __which & ios::in;
+ bool pos_out = __which & ios::out;
+ if (pos_in || pos_out)
+ {
+ if (!((pos_in && gptr() == nullptr) || (pos_out && pptr() == nullptr)))
+ {
+ off_type newoff = __sp;
+ char* seekhigh = epptr() ? epptr() : egptr();
+ if (0 <= newoff && newoff <= seekhigh - eback())
+ {
+ char* newpos = eback() + newoff;
+ if (pos_in)
+ setg(eback(), newpos, max(newpos, egptr()));
+ if (pos_out)
+ {
+ // min(pbase, newpos), newpos, epptr()
+ off_type temp = epptr() - newpos;
+ setp(min(pbase(), newpos), epptr());
+ pbump(static_cast<int>((epptr() - pbase()) - temp));
+ }
+ __p = newoff;
+ }
+ }
+ }
+ return pos_type(__p);
+}
+
+istrstream::~istrstream()
+{
+}
+
+ostrstream::~ostrstream()
+{
+}
+
+strstream::~strstream()
+{
+}
+
+_LIBCPP_END_NAMESPACE_STD