349 lines
12 KiB
C++
349 lines
12 KiB
C++
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/*============================================================================
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KWSys - Kitware System Library
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Copyright 2000-2016 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#ifndef @KWSYS_NAMESPACE@_ConsoleBuf_hxx
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#define @KWSYS_NAMESPACE@_ConsoleBuf_hxx
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#include <@KWSYS_NAMESPACE@/Configure.hxx>
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#include <@KWSYS_NAMESPACE@/Encoding.hxx>
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#include <string>
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#include <cstring>
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#include <sstream>
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#include <streambuf>
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#include <iostream>
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#include <stdexcept>
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#if defined(_WIN32)
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# include <windows.h>
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# if __cplusplus >= 201103L
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# include <system_error>
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# endif
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#endif
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namespace @KWSYS_NAMESPACE@
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{
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#if defined(_WIN32)
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template<class CharT, class Traits = std::char_traits<CharT> >
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class @KWSYS_NAMESPACE@_EXPORT BasicConsoleBuf :
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public std::basic_streambuf<CharT, Traits> {
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public:
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typedef typename Traits::int_type int_type;
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typedef typename Traits::char_type char_type;
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class Manager {
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public:
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Manager(std::basic_ios<CharT, Traits> &ios, const bool err = false)
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: m_consolebuf(0)
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{
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m_ios = &ios;
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try {
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m_consolebuf = new BasicConsoleBuf<CharT, Traits>(err);
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m_streambuf = m_ios->rdbuf(m_consolebuf);
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} catch (const std::runtime_error& ex) {
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std::cerr << "Failed to create ConsoleBuf!" << std::endl
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<< ex.what() << std::endl;
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};
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}
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~Manager()
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{
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if (m_consolebuf) {
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delete m_consolebuf;
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m_ios->rdbuf(m_streambuf);
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}
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}
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private:
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std::basic_ios<CharT, Traits> *m_ios;
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std::basic_streambuf<CharT, Traits> *m_streambuf;
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BasicConsoleBuf<CharT, Traits> *m_consolebuf;
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};
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BasicConsoleBuf(const bool err = false) :
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flush_on_newline(true),
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input_pipe_codepage(0),
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output_pipe_codepage(0),
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input_file_codepage(CP_UTF8),
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output_file_codepage(CP_UTF8),
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m_consolesCodepage(0)
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{
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m_hInput = ::GetStdHandle(STD_INPUT_HANDLE);
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checkHandle(true, "STD_INPUT_HANDLE");
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if (!setActiveInputCodepage()) {
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throw std::runtime_error("setActiveInputCodepage failed!");
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}
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m_hOutput = err ? ::GetStdHandle(STD_ERROR_HANDLE) :
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::GetStdHandle(STD_OUTPUT_HANDLE);
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checkHandle(false, err ? "STD_ERROR_HANDLE" : "STD_OUTPUT_HANDLE");
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if (!setActiveOutputCodepage()) {
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throw std::runtime_error("setActiveOutputCodepage failed!");
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}
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_setg();
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_setp();
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}
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~BasicConsoleBuf() throw()
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{
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sync();
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}
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bool activateCodepageChange()
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{
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return setActiveInputCodepage() && setActiveOutputCodepage();
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}
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protected:
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virtual int sync() {
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bool success = true;
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if (m_hInput && m_isConsoleInput &&
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::FlushConsoleInputBuffer(m_hInput) == 0) {
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success = false;
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}
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if (m_hOutput && !m_obuffer.empty()) {
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const std::wstring wbuffer = getBuffer(m_obuffer);
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if (m_isConsoleOutput) {
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DWORD charsWritten;
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success = ::WriteConsoleW(m_hOutput, wbuffer.c_str(),
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(DWORD)wbuffer.size(), &charsWritten,
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NULL) == 0 ? false : true;
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} else {
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DWORD bytesWritten;
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std::string buffer;
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success = encodeOutputBuffer(wbuffer, buffer);
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if (success) {
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success = ::WriteFile(m_hOutput, buffer.c_str(),
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(DWORD)buffer.size(), &bytesWritten,
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NULL) == 0 ? false : true;
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}
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}
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}
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m_ibuffer.clear();
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m_obuffer.clear();
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_setg();
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_setp();
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return success ? 0 : -1;
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}
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virtual int_type underflow() {
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if (this->gptr() >= this->egptr()) {
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if (!m_hInput) {
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_setg(true);
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return Traits::eof();
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}
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if (m_isConsoleInput) {
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wchar_t wbuffer[128];
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DWORD charsRead;
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if (::ReadConsoleW(m_hInput, wbuffer, (sizeof(wbuffer) / sizeof(wbuffer[0])) - 1,
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&charsRead, NULL) == 0 || charsRead == 0) {
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_setg(true);
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return Traits::eof();
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}
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wbuffer[charsRead] = L'\0';
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setBuffer(wbuffer, m_ibuffer);
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} else {
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std::wstring totalBuffer;
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std::wstring wbuffer;
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char buffer[128];
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DWORD bytesRead;
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while (::ReadFile(m_hInput, buffer, (sizeof(buffer) / sizeof(buffer[0])) - 1,
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&bytesRead, NULL) == 0) {
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if (::GetLastError() == ERROR_MORE_DATA) {
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buffer[bytesRead] = '\0';
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if (decodeInputBuffer(buffer, wbuffer)) {
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totalBuffer += wbuffer;
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continue;
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}
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}
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_setg(true);
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return Traits::eof();
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}
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buffer[bytesRead] = '\0';
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if (!decodeInputBuffer(buffer, wbuffer)) {
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_setg(true);
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return Traits::eof();
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}
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totalBuffer += wbuffer;
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setBuffer(totalBuffer, m_ibuffer);
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}
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_setg();
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}
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return Traits::to_int_type(*this->gptr());
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}
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virtual int_type overflow(int_type ch = Traits::eof()) {
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if (!Traits::eq_int_type(ch, Traits::eof())) {
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char_type chr = Traits::to_char_type(ch);
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m_obuffer += chr;
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if ((flush_on_newline && Traits::eq(chr, '\n')) ||
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Traits::eq_int_type(ch, 0x00)) {
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sync();
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}
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return ch;
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}
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sync();
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return Traits::eof();
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}
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public:
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bool flush_on_newline;
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UINT input_pipe_codepage;
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UINT output_pipe_codepage;
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UINT input_file_codepage;
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UINT output_file_codepage;
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private:
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HANDLE m_hInput;
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HANDLE m_hOutput;
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std::basic_string<char_type> m_ibuffer;
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std::basic_string<char_type> m_obuffer;
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bool m_isConsoleInput;
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bool m_isConsoleOutput;
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UINT m_activeInputCodepage;
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UINT m_activeOutputCodepage;
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UINT m_consolesCodepage;
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void checkHandle(bool input, std::string handleName) {
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if ((input && m_hInput == INVALID_HANDLE_VALUE) ||
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(!input && m_hOutput == INVALID_HANDLE_VALUE)) {
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std::string errmsg = "GetStdHandle(" + handleName +
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") returned INVALID_HANDLE_VALUE";
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#if __cplusplus >= 201103L
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throw std::system_error(::GetLastError(),
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std::system_category(), errmsg);
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#else
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throw std::runtime_error(errmsg);
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#endif
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}
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}
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UINT getConsolesCodepage() {
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if (!m_consolesCodepage) {
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m_consolesCodepage = GetConsoleCP();
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if (!m_consolesCodepage) {
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m_consolesCodepage = GetACP();
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}
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}
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return m_consolesCodepage;
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}
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bool setActiveInputCodepage() {
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m_isConsoleInput = false;
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switch (GetFileType(m_hInput)) {
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case FILE_TYPE_DISK:
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m_activeInputCodepage = input_file_codepage;
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break;
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case FILE_TYPE_CHAR:
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m_isConsoleInput = true;
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break;
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case FILE_TYPE_PIPE:
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m_activeInputCodepage = input_pipe_codepage;
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break;
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default:
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return false;
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}
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if (!m_isConsoleInput && m_activeInputCodepage == 0) {
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m_activeInputCodepage = getConsolesCodepage();
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}
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return true;
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}
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bool setActiveOutputCodepage() {
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m_isConsoleOutput = false;
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switch (GetFileType(m_hOutput)) {
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case FILE_TYPE_DISK:
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m_activeOutputCodepage = output_file_codepage;
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break;
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case FILE_TYPE_CHAR:
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m_isConsoleOutput = true;
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break;
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case FILE_TYPE_PIPE:
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m_activeOutputCodepage = output_pipe_codepage;
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break;
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default:
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return false;
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}
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if (!m_isConsoleOutput && m_activeOutputCodepage == 0) {
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m_activeOutputCodepage = getConsolesCodepage();
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}
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return true;
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}
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void _setg(bool empty = false) {
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if (!empty) {
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this->setg((char_type *)m_ibuffer.data(),
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(char_type *)m_ibuffer.data(),
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(char_type *)m_ibuffer.data() + m_ibuffer.size());
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} else {
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this->setg((char_type *)m_ibuffer.data(),
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(char_type *)m_ibuffer.data() + m_ibuffer.size(),
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(char_type *)m_ibuffer.data() + m_ibuffer.size());
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}
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}
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void _setp() {
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this->setp((char_type *)m_obuffer.data(),
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(char_type *)m_obuffer.data() + m_obuffer.size());
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}
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bool encodeOutputBuffer(const std::wstring wbuffer,
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std::string &buffer) {
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const int length = WideCharToMultiByte(m_activeOutputCodepage, 0,
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wbuffer.c_str(),
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(int)wbuffer.size(), NULL, 0,
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NULL, NULL);
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char *buf = new char[length + 1];
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const bool success = WideCharToMultiByte(m_activeOutputCodepage, 0,
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wbuffer.c_str(),
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(int)wbuffer.size(), buf,
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length, NULL, NULL) > 0
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? true : false;
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buf[length] = '\0';
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buffer = buf;
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delete[] buf;
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return success;
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}
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bool decodeInputBuffer(const char *buffer, std::wstring &wbuffer) {
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int actualCodepage = m_activeInputCodepage;
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const char BOM_UTF8[] = { char(0xEF), char(0xBB), char(0xBF) };
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if (std::memcmp(buffer, BOM_UTF8, sizeof(BOM_UTF8)) == 0) {
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// PowerShell uses UTF-8 with BOM for pipes
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actualCodepage = CP_UTF8;
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buffer += sizeof(BOM_UTF8);
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}
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const int wlength = MultiByteToWideChar(actualCodepage, 0, buffer,
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-1, NULL, 0);
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wchar_t *wbuf = new wchar_t[wlength];
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const bool success = MultiByteToWideChar(actualCodepage, 0, buffer,
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-1, wbuf, wlength) > 0
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? true : false;
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wbuffer = wbuf;
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delete[] wbuf;
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return success;
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}
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std::wstring getBuffer(const std::basic_string<char> buffer) {
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return Encoding::ToWide(buffer);
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}
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std::wstring getBuffer(const std::basic_string<wchar_t> buffer) {
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return buffer;
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}
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void setBuffer(const std::wstring wbuffer,
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std::basic_string<char> &target) {
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target = Encoding::ToNarrow(wbuffer);
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}
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void setBuffer(const std::wstring wbuffer,
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std::basic_string<wchar_t> &target) {
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target = wbuffer;
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}
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}; // BasicConsoleBuf class
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typedef BasicConsoleBuf<char> ConsoleBuf;
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typedef BasicConsoleBuf<wchar_t> WConsoleBuf;
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#endif
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} // KWSYS_NAMESPACE
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#endif
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