1 // Copyright (c) 2015 Ryan Prichard
3 // Permission is hereby granted, free of charge, to any person obtaining a copy
4 // of this software and associated documentation files (the "Software"), to
5 // deal in the Software without restriction, including without limitation the
6 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 // sell copies of the Software, and to permit persons to whom the Software is
8 // furnished to do so, subject to the following conditions:
10 // The above copyright notice and this permission notice shall be included in
11 // all copies or substantial portions of the Software.
13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 #include "LargeConsoleRead.h"
25 #include "../shared/WindowsVersion.h"
27 #include "Win32ConsoleBuffer.h"
29 LargeConsoleReadBuffer::LargeConsoleReadBuffer() :
30 m_rect(0, 0, 0, 0), m_rectWidth(0)
34 void largeConsoleRead(LargeConsoleReadBuffer &out,
35 Win32ConsoleBuffer &buffer,
36 const SmallRect &readArea,
37 WORD attributesMask) {
38 ASSERT(readArea.Left >= 0 &&
40 readArea.Right >= readArea.Left &&
41 readArea.Bottom >= readArea.Top &&
42 readArea.width() <= MAX_CONSOLE_WIDTH);
43 const size_t count = readArea.width() * readArea.height();
44 if (out.m_data.size() < count) {
45 out.m_data.resize(count);
47 out.m_rect = readArea;
48 out.m_rectWidth = readArea.width();
50 static const bool useLargeReads = isAtLeastWindows8();
52 buffer.read(readArea, out.m_data.data());
54 const int maxReadLines = std::max(1, MAX_CONSOLE_WIDTH / readArea.width());
55 int curLine = readArea.Top;
56 while (curLine <= readArea.Bottom) {
57 const SmallRect subReadArea(
61 std::min(maxReadLines, readArea.Bottom + 1 - curLine));
62 buffer.read(subReadArea, out.lineDataMut(curLine));
63 curLine = subReadArea.Bottom + 1;
66 if (attributesMask != static_cast<WORD>(~0)) {
67 for (size_t i = 0; i < count; ++i) {
68 out.m_data[i].Attributes &= attributesMask;