| 1 | /* |
|---|---|
| 2 | * |
| 3 | * Copyright (c) 2003 Dr John Maddock |
| 4 | * Use, modification and distribution is subject to the |
| 5 | * Boost Software License, Version 1.0. (See accompanying file |
| 6 | * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 7 | * |
| 8 | * This file implements the fileview class |
| 9 | */ |
| 10 | |
| 11 | #include "fileview.hpp" |
| 12 | #include <boost/filesystem/fstream.hpp> |
| 13 | #include <vector> |
| 14 | #include <algorithm> |
| 15 | #include <string> |
| 16 | #include <fstream> |
| 17 | #include <istream> |
| 18 | #include <stdexcept> |
| 19 | |
| 20 | struct fileview::implementation |
| 21 | { |
| 22 | std::vector<char> m_data; |
| 23 | }; |
| 24 | |
| 25 | |
| 26 | // construct: |
| 27 | fileview::fileview() |
| 28 | { |
| 29 | pimpl.reset(p: new implementation()); |
| 30 | } |
| 31 | |
| 32 | fileview::fileview(const boost::filesystem::path& p) |
| 33 | { |
| 34 | pimpl.reset(p: new implementation()); |
| 35 | open(p); |
| 36 | } |
| 37 | |
| 38 | fileview::~fileview() |
| 39 | { |
| 40 | } |
| 41 | |
| 42 | fileview::fileview(const fileview& ) |
| 43 | { |
| 44 | } |
| 45 | |
| 46 | fileview& fileview::operator=(const fileview& that) |
| 47 | { |
| 48 | pimpl = that.pimpl; |
| 49 | return *this; |
| 50 | } |
| 51 | |
| 52 | void fileview::close() |
| 53 | { |
| 54 | cow(); |
| 55 | pimpl->m_data.clear(); |
| 56 | } |
| 57 | |
| 58 | void fileview::open(const boost::filesystem::path& p) |
| 59 | { |
| 60 | cow(); |
| 61 | boost::filesystem::ifstream is(p); |
| 62 | if(!is) |
| 63 | { |
| 64 | std::string msg("Bad file name: "); |
| 65 | msg += p.string(); |
| 66 | std::runtime_error e(msg); |
| 67 | boost::throw_exception(e); |
| 68 | } |
| 69 | std::istreambuf_iterator<char> in(is); |
| 70 | std::istreambuf_iterator<char> end; |
| 71 | std::copy(first: in, last: end, result: std::back_inserter(x&: pimpl->m_data)); |
| 72 | } |
| 73 | |
| 74 | // iterators: |
| 75 | fileview::const_iterator fileview::begin() const |
| 76 | { |
| 77 | return pimpl->m_data.size() ? &(pimpl->m_data[0]) : 0; |
| 78 | } |
| 79 | |
| 80 | fileview::const_iterator fileview::end() const |
| 81 | { |
| 82 | return begin() + pimpl->m_data.size(); |
| 83 | } |
| 84 | |
| 85 | #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 86 | fileview::const_reverse_iterator fileview::rbegin() const |
| 87 | { |
| 88 | return const_reverse_iterator(end()); |
| 89 | } |
| 90 | |
| 91 | fileview::const_reverse_iterator fileview::rend() const |
| 92 | { |
| 93 | return const_reverse_iterator(begin()); |
| 94 | } |
| 95 | #endif |
| 96 | |
| 97 | // capacity: |
| 98 | fileview::size_type fileview::size() const |
| 99 | { |
| 100 | return pimpl->m_data.size(); |
| 101 | } |
| 102 | |
| 103 | fileview::size_type fileview::max_size() const |
| 104 | { |
| 105 | return pimpl->m_data.max_size(); |
| 106 | } |
| 107 | |
| 108 | bool fileview::empty() const |
| 109 | { |
| 110 | return pimpl->m_data.empty(); |
| 111 | } |
| 112 | |
| 113 | // element access: |
| 114 | fileview::const_reference fileview::operator[](fileview::size_type n) const |
| 115 | { |
| 116 | return pimpl->m_data[n]; |
| 117 | } |
| 118 | |
| 119 | fileview::const_reference fileview::at(size_type n) const |
| 120 | { |
| 121 | return pimpl->m_data.at(n: n); |
| 122 | } |
| 123 | |
| 124 | fileview::const_reference fileview::front() const |
| 125 | { |
| 126 | return pimpl->m_data.front(); |
| 127 | } |
| 128 | |
| 129 | fileview::const_reference fileview::back() const |
| 130 | { |
| 131 | return pimpl->m_data.back(); |
| 132 | } |
| 133 | |
| 134 | void fileview::swap(fileview& that) |
| 135 | { |
| 136 | pimpl.swap(other&: that.pimpl); |
| 137 | } |
| 138 | |
| 139 | void fileview::cow() |
| 140 | { |
| 141 | if(!pimpl.unique()) |
| 142 | pimpl.reset(p: new implementation(*pimpl)); |
| 143 | } |
| 144 |