Move istringstream_nocopy to a separate file
This commit is contained in:
parent
3229f85585
commit
f8b84a3b8c
5 changed files with 95 additions and 90 deletions
|
@ -4,7 +4,7 @@
|
|||
#include "util.hh"
|
||||
#include "worker-protocol.hh"
|
||||
#include "fs-accessor.hh"
|
||||
|
||||
#include "istringstream_nocopy.hh"
|
||||
|
||||
namespace nix {
|
||||
|
||||
|
|
|
@ -7,6 +7,7 @@
|
|||
#include "globals.hh"
|
||||
#include "compression.hh"
|
||||
#include "download.hh"
|
||||
#include "istringstream_nocopy.hh"
|
||||
|
||||
#include <aws/core/Aws.h>
|
||||
#include <aws/core/client/ClientConfiguration.h>
|
||||
|
|
|
@ -7,12 +7,12 @@
|
|||
#include "hash.hh"
|
||||
#include "archive.hh"
|
||||
#include "util.hh"
|
||||
#include "istringstream_nocopy.hh"
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
|
||||
namespace nix {
|
||||
|
||||
|
||||
|
|
92
src/libutil/istringstream_nocopy.hh
Normal file
92
src/libutil/istringstream_nocopy.hh
Normal file
|
@ -0,0 +1,92 @@
|
|||
/* This file provides a variant of std::istringstream that doesn't
|
||||
copy its string argument. This is useful for large strings. The
|
||||
caller must ensure that the string object is not destroyed while
|
||||
it's referenced by this object. */
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <string>
|
||||
#include <iostream>
|
||||
|
||||
template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT>>
|
||||
class basic_istringbuf_nocopy : public std::basic_streambuf<CharT, Traits>
|
||||
{
|
||||
public:
|
||||
typedef std::basic_string<CharT, Traits, Allocator> string_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::off_type off_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::pos_type pos_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::int_type int_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::traits_type traits_type;
|
||||
|
||||
private:
|
||||
const string_type & s;
|
||||
|
||||
off_type off;
|
||||
|
||||
public:
|
||||
basic_istringbuf_nocopy(const string_type & s) : s{s}, off{0}
|
||||
{
|
||||
}
|
||||
|
||||
private:
|
||||
pos_type seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which)
|
||||
{
|
||||
if (which & std::ios_base::in) {
|
||||
this->off = dir == std::ios_base::beg
|
||||
? off
|
||||
: (dir == std::ios_base::end
|
||||
? s.size() + off
|
||||
: this->off + off);
|
||||
}
|
||||
return pos_type(this->off);
|
||||
}
|
||||
|
||||
pos_type seekpos(pos_type pos, std::ios_base::openmode which)
|
||||
{
|
||||
return seekoff(pos, std::ios_base::beg, which);
|
||||
}
|
||||
|
||||
std::streamsize showmanyc()
|
||||
{
|
||||
return s.size() - off;
|
||||
}
|
||||
|
||||
int_type underflow()
|
||||
{
|
||||
if (typename string_type::size_type(off) == s.size())
|
||||
return traits_type::eof();
|
||||
return traits_type::to_int_type(s[off]);
|
||||
}
|
||||
|
||||
int_type uflow()
|
||||
{
|
||||
if (typename string_type::size_type(off) == s.size())
|
||||
return traits_type::eof();
|
||||
return traits_type::to_int_type(s[off++]);
|
||||
}
|
||||
|
||||
int_type pbackfail(int_type ch)
|
||||
{
|
||||
if (off == 0 || (ch != traits_type::eof() && ch != s[off - 1]))
|
||||
return traits_type::eof();
|
||||
|
||||
return traits_type::to_int_type(s[--off]);
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT>>
|
||||
class basic_istringstream_nocopy : public std::basic_iostream<CharT, Traits>
|
||||
{
|
||||
typedef basic_istringbuf_nocopy<CharT, Traits, Allocator> buf_type;
|
||||
buf_type buf;
|
||||
public:
|
||||
basic_istringstream_nocopy(const typename buf_type::string_type & s) :
|
||||
std::basic_iostream<CharT, Traits>(&buf), buf(s) {};
|
||||
};
|
||||
|
||||
typedef basic_istringstream_nocopy<char> istringstream_nocopy;
|
|
@ -451,92 +451,4 @@ struct ReceiveInterrupts
|
|||
{ }
|
||||
};
|
||||
|
||||
|
||||
template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT>>
|
||||
class basic_istringbuf_nocopy : public std::basic_streambuf<CharT, Traits>
|
||||
{
|
||||
public:
|
||||
typedef std::basic_string<CharT, Traits, Allocator> string_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::off_type off_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::pos_type pos_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::int_type int_type;
|
||||
|
||||
typedef typename std::basic_streambuf<CharT, Traits>::traits_type traits_type;
|
||||
|
||||
private:
|
||||
const string_type & s;
|
||||
|
||||
off_type off;
|
||||
|
||||
public:
|
||||
basic_istringbuf_nocopy(const string_type & s) : s{s}, off{0}
|
||||
{
|
||||
}
|
||||
|
||||
private:
|
||||
pos_type seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which)
|
||||
{
|
||||
if (which & std::ios_base::in) {
|
||||
this->off = dir == std::ios_base::beg
|
||||
? off
|
||||
: (dir == std::ios_base::end
|
||||
? s.size() + off
|
||||
: this->off + off);
|
||||
}
|
||||
return pos_type(this->off);
|
||||
}
|
||||
|
||||
pos_type seekpos(pos_type pos, std::ios_base::openmode which)
|
||||
{
|
||||
return seekoff(pos, std::ios_base::beg, which);
|
||||
}
|
||||
|
||||
std::streamsize showmanyc()
|
||||
{
|
||||
return s.size() - off;
|
||||
}
|
||||
|
||||
int_type underflow()
|
||||
{
|
||||
if (typename string_type::size_type(off) == s.size())
|
||||
return traits_type::eof();
|
||||
return traits_type::to_int_type(s[off]);
|
||||
}
|
||||
|
||||
int_type uflow()
|
||||
{
|
||||
if (typename string_type::size_type(off) == s.size())
|
||||
return traits_type::eof();
|
||||
return traits_type::to_int_type(s[off++]);
|
||||
}
|
||||
|
||||
int_type pbackfail(int_type ch)
|
||||
{
|
||||
if (off == 0 || (ch != traits_type::eof() && ch != s[off - 1]))
|
||||
return traits_type::eof();
|
||||
|
||||
return traits_type::to_int_type(s[--off]);
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT>>
|
||||
class basic_istringstream_nocopy : public std::basic_iostream<CharT, Traits>
|
||||
{
|
||||
typedef basic_istringbuf_nocopy<CharT, Traits, Allocator> buf_type;
|
||||
buf_type buf;
|
||||
public:
|
||||
basic_istringstream_nocopy(const typename buf_type::string_type & s) :
|
||||
std::basic_iostream<CharT, Traits>(&buf), buf(s) {};
|
||||
};
|
||||
|
||||
/* A variant of std::istringstream that doesn't its string
|
||||
argument. This is useful for large strings. The caller must ensure
|
||||
that the string object is not destroyed while it's referenced by
|
||||
this object. */
|
||||
typedef basic_istringstream_nocopy<char> istringstream_nocopy;
|
||||
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue