| 1 | // file : xsd/cxx/zc-istream.hxx |
|---|
| 2 | // author : Boris Kolpackov <boris@codesynthesis.com> |
|---|
| 3 | // copyright : Copyright (c) 2005-2008 Code Synthesis Tools CC |
|---|
| 4 | // license : GNU GPL v2 + exceptions; see accompanying LICENSE file |
|---|
| 5 | |
|---|
| 6 | #ifndef XSD_CXX_ZC_ISTREAM_HXX |
|---|
| 7 | #define XSD_CXX_ZC_ISTREAM_HXX |
|---|
| 8 | |
|---|
| 9 | #include <string> |
|---|
| 10 | #include <istream> |
|---|
| 11 | |
|---|
| 12 | #include <xsd/cxx/ro-string.hxx> |
|---|
| 13 | |
|---|
| 14 | namespace xsd |
|---|
| 15 | { |
|---|
| 16 | namespace cxx |
|---|
| 17 | { |
|---|
| 18 | // Input streambuffer that does not copy the underlying |
|---|
| 19 | // buffer (zero copy). |
|---|
| 20 | // |
|---|
| 21 | template <typename C> |
|---|
| 22 | class zc_streambuf: public std::basic_streambuf<C> |
|---|
| 23 | { |
|---|
| 24 | public: |
|---|
| 25 | typedef typename std::basic_streambuf<C>::int_type int_type; |
|---|
| 26 | typedef typename std::basic_streambuf<C>::traits_type traits_type; |
|---|
| 27 | |
|---|
| 28 | public: |
|---|
| 29 | zc_streambuf (const ro_string<C>&); |
|---|
| 30 | zc_streambuf (const std::basic_string<C>&); |
|---|
| 31 | |
|---|
| 32 | protected: |
|---|
| 33 | virtual std::streamsize |
|---|
| 34 | showmanyc (); |
|---|
| 35 | |
|---|
| 36 | virtual int_type |
|---|
| 37 | underflow (); |
|---|
| 38 | |
|---|
| 39 | private: |
|---|
| 40 | void |
|---|
| 41 | init (); |
|---|
| 42 | |
|---|
| 43 | private: |
|---|
| 44 | zc_streambuf (const zc_streambuf&); |
|---|
| 45 | |
|---|
| 46 | zc_streambuf& |
|---|
| 47 | operator= (const zc_streambuf&); |
|---|
| 48 | |
|---|
| 49 | private: |
|---|
| 50 | ro_string<C> str_; |
|---|
| 51 | }; |
|---|
| 52 | |
|---|
| 53 | |
|---|
| 54 | // Input string stream that does not copy the underlying string. |
|---|
| 55 | // |
|---|
| 56 | template <typename C> |
|---|
| 57 | class zc_istream_base |
|---|
| 58 | { |
|---|
| 59 | protected: |
|---|
| 60 | zc_istream_base (const ro_string<C>&); |
|---|
| 61 | zc_istream_base (const std::basic_string<C>&); |
|---|
| 62 | |
|---|
| 63 | protected: |
|---|
| 64 | zc_streambuf<C> buf_; |
|---|
| 65 | }; |
|---|
| 66 | |
|---|
| 67 | template <typename C> |
|---|
| 68 | class zc_istream: protected zc_istream_base<C>, |
|---|
| 69 | public std::basic_istream<C> |
|---|
| 70 | { |
|---|
| 71 | public: |
|---|
| 72 | zc_istream (const ro_string<C>&); |
|---|
| 73 | zc_istream (const std::basic_string<C>&); |
|---|
| 74 | |
|---|
| 75 | bool |
|---|
| 76 | exhausted () |
|---|
| 77 | { |
|---|
| 78 | return this->get () == std::basic_istream<C>::traits_type::eof (); |
|---|
| 79 | } |
|---|
| 80 | |
|---|
| 81 | private: |
|---|
| 82 | zc_istream (const zc_istream&); |
|---|
| 83 | |
|---|
| 84 | zc_istream& |
|---|
| 85 | operator= (const zc_istream&); |
|---|
| 86 | }; |
|---|
| 87 | } |
|---|
| 88 | } |
|---|
| 89 | |
|---|
| 90 | #include <xsd/cxx/zc-istream.txx> |
|---|
| 91 | |
|---|
| 92 | #endif // XSD_CXX_ZC_ISTREAM_HXX |
|---|
