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cpp-peglib/language/linenoise.hpp
yhirose 0168d19a0c Added language project.
2015-05-28 19:19:46 -04:00

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/*
* linenoise.hpp -- Multi-platfrom C++ header-only linenoise library.
*
* All credits and commendations have to go to the authors of the
* following excellent libraries.
*
* - linenoise.h and linenose.c (https://github.com/antirez/linenoise)
* - ANSI.c (https://github.com/adoxa/ansicon)
* - Win32_ANSI.h and Win32_ANSI.c (https://github.com/MSOpenTech/redis)
*
* ------------------------------------------------------------------------
*
* Copyright (c) 2015 yhirose
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* linenoise.h -- guerrilla line editing library against the idea that a
* line editing lib needs to be 20,000 lines of C code.
*
* See linenoise.c for more information.
*
* ------------------------------------------------------------------------
*
* Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
* Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* ANSI.c - ANSI escape sequence console driver.
*
* Copyright (C) 2005-2014 Jason Hood
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the author be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*
* Jason Hood
* jadoxa@yahoo.com.au
*/
/*
* Win32_ANSI.h and Win32_ANSI.c
*
* Derived from ANSI.c by Jason Hood, from his ansicon project (https://github.com/adoxa/ansicon), with modifications.
*
* Copyright (c), Microsoft Open Technologies, Inc.
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __LINENOISE_HPP
#define __LINENOISE_HPP
#ifndef _WIN32
#include <termios.h>
#include <unistd.h>
#include <sys/ioctl.h>
#else
#define _CRT_SECURE_NO_WARNINGS
#define NOMINMAX
#include <Windows.h>
#include <io.h>
#ifndef STDIN_FILENO
#define STDIN_FILENO (_fileno(stdin))
#endif
#ifndef STDOUT_FILENO
#define STDOUT_FILENO 1
#endif
#define snprintf _snprintf
#define isatty _isatty
#define write win32_write
#define read _read
#endif
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <string>
#include <fstream>
#include <functional>
#include <vector>
#include <iostream>
namespace linenoise {
typedef std::function<void (const char*, std::vector<std::string>&)> CompletionCallback;
#ifdef _WIN32
namespace ansi {
#define lenof(array) (sizeof(array)/sizeof(*(array)))
typedef struct
{
BYTE foreground; // ANSI base color (0 to 7; add 30)
BYTE background; // ANSI base color (0 to 7; add 40)
BYTE bold; // console FOREGROUND_INTENSITY bit
BYTE underline; // console BACKGROUND_INTENSITY bit
BYTE rvideo; // swap foreground/bold & background/underline
BYTE concealed; // set foreground/bold to background/underline
BYTE reverse; // swap console foreground & background attributes
} GRM, *PGRM; // Graphic Rendition Mode
inline bool is_digit(char c) { return '0' <= c && c <= '9'; }
// ========== Global variables and constants
HANDLE hConOut; // handle to CONOUT$
const char ESC = '\x1B'; // ESCape character
const char BEL = '\x07';
const char SO = '\x0E'; // Shift Out
const char SI = '\x0F'; // Shift In
const size_t MAX_ARG = 16; // max number of args in an escape sequence
int state; // automata state
TCHAR prefix; // escape sequence prefix ( '[', ']' or '(' );
TCHAR prefix2; // secondary prefix ( '?' or '>' );
TCHAR suffix; // escape sequence suffix
int es_argc; // escape sequence args count
int es_argv[MAX_ARG]; // escape sequence args
TCHAR Pt_arg[MAX_PATH * 2]; // text parameter for Operating System Command
int Pt_len;
BOOL shifted;
// DEC Special Graphics Character Set from
// http://vt100.net/docs/vt220-rm/table2-4.html
// Some of these may not look right, depending on the font and code page (in
// particular, the Control Pictures probably won't work at all).
const WCHAR G1[] =
{
' ', // _ - blank
L'\x2666', // ` - Black Diamond Suit
L'\x2592', // a - Medium Shade
L'\x2409', // b - HT
L'\x240c', // c - FF
L'\x240d', // d - CR
L'\x240a', // e - LF
L'\x00b0', // f - Degree Sign
L'\x00b1', // g - Plus-Minus Sign
L'\x2424', // h - NL
L'\x240b', // i - VT
L'\x2518', // j - Box Drawings Light Up And Left
L'\x2510', // k - Box Drawings Light Down And Left
L'\x250c', // l - Box Drawings Light Down And Right
L'\x2514', // m - Box Drawings Light Up And Right
L'\x253c', // n - Box Drawings Light Vertical And Horizontal
L'\x00af', // o - SCAN 1 - Macron
L'\x25ac', // p - SCAN 3 - Black Rectangle
L'\x2500', // q - SCAN 5 - Box Drawings Light Horizontal
L'_', // r - SCAN 7 - Low Line
L'_', // s - SCAN 9 - Low Line
L'\x251c', // t - Box Drawings Light Vertical And Right
L'\x2524', // u - Box Drawings Light Vertical And Left
L'\x2534', // v - Box Drawings Light Up And Horizontal
L'\x252c', // w - Box Drawings Light Down And Horizontal
L'\x2502', // x - Box Drawings Light Vertical
L'\x2264', // y - Less-Than Or Equal To
L'\x2265', // z - Greater-Than Or Equal To
L'\x03c0', // { - Greek Small Letter Pi
L'\x2260', // | - Not Equal To
L'\x00a3', // } - Pound Sign
L'\x00b7', // ~ - Middle Dot
};
#define FIRST_G1 '_'
#define LAST_G1 '~'
// color constants
#define FOREGROUND_BLACK 0
#define FOREGROUND_WHITE FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE
#define BACKGROUND_BLACK 0
#define BACKGROUND_WHITE BACKGROUND_RED|BACKGROUND_GREEN|BACKGROUND_BLUE
const BYTE foregroundcolor[8] =
{
FOREGROUND_BLACK, // black foreground
FOREGROUND_RED, // red foreground
FOREGROUND_GREEN, // green foreground
FOREGROUND_RED | FOREGROUND_GREEN, // yellow foreground
FOREGROUND_BLUE, // blue foreground
FOREGROUND_BLUE | FOREGROUND_RED, // magenta foreground
FOREGROUND_BLUE | FOREGROUND_GREEN, // cyan foreground
FOREGROUND_WHITE // white foreground
};
const BYTE backgroundcolor[8] =
{
BACKGROUND_BLACK, // black background
BACKGROUND_RED, // red background
BACKGROUND_GREEN, // green background
BACKGROUND_RED | BACKGROUND_GREEN, // yellow background
BACKGROUND_BLUE, // blue background
BACKGROUND_BLUE | BACKGROUND_RED, // magenta background
BACKGROUND_BLUE | BACKGROUND_GREEN, // cyan background
BACKGROUND_WHITE, // white background
};
const BYTE attr2ansi[8] = // map console attribute to ANSI number
{
0, // black
4, // blue
2, // green
6, // cyan
1, // red
5, // magenta
3, // yellow
7 // white
};
GRM grm;
// saved cursor position
COORD SavePos;
// ========== Print Buffer functions
#define BUFFER_SIZE 2048
int nCharInBuffer;
WCHAR ChBuffer[BUFFER_SIZE];
//-----------------------------------------------------------------------------
// FlushBuffer()
// Writes the buffer to the console and empties it.
//-----------------------------------------------------------------------------
inline void FlushBuffer(void)
{
DWORD nWritten;
if (nCharInBuffer <= 0) return;
WriteConsole(hConOut, ChBuffer, nCharInBuffer, &nWritten, NULL);
nCharInBuffer = 0;
}
//-----------------------------------------------------------------------------
// PushBuffer( WCHAR c )
// Adds a character in the buffer.
//-----------------------------------------------------------------------------
inline void PushBuffer(WCHAR c)
{
if (shifted && c >= FIRST_G1 && c <= LAST_G1)
c = G1[c - FIRST_G1];
ChBuffer[nCharInBuffer] = c;
if (++nCharInBuffer == BUFFER_SIZE)
FlushBuffer();
}
//-----------------------------------------------------------------------------
// SendSequence( LPTSTR seq )
// Send the string to the input buffer.
//-----------------------------------------------------------------------------
inline void SendSequence(LPTSTR seq)
{
DWORD out;
INPUT_RECORD in;
HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
in.EventType = KEY_EVENT;
in.Event.KeyEvent.bKeyDown = TRUE;
in.Event.KeyEvent.wRepeatCount = 1;
in.Event.KeyEvent.wVirtualKeyCode = 0;
in.Event.KeyEvent.wVirtualScanCode = 0;
in.Event.KeyEvent.dwControlKeyState = 0;
for (; *seq; ++seq)
{
in.Event.KeyEvent.uChar.UnicodeChar = *seq;
WriteConsoleInput(hStdIn, &in, 1, &out);
}
}
// ========== Print functions
//-----------------------------------------------------------------------------
// InterpretEscSeq()
// Interprets the last escape sequence scanned by ParseAndPrintANSIString
// prefix escape sequence prefix
// es_argc escape sequence args count
// es_argv[] escape sequence args array
// suffix escape sequence suffix
//
// for instance, with \e[33;45;1m we have
// prefix = '[',
// es_argc = 3, es_argv[0] = 33, es_argv[1] = 45, es_argv[2] = 1
// suffix = 'm'
//-----------------------------------------------------------------------------
inline void InterpretEscSeq(void)
{
int i;
WORD attribut;
CONSOLE_SCREEN_BUFFER_INFO Info;
CONSOLE_CURSOR_INFO CursInfo;
DWORD len, NumberOfCharsWritten;
COORD Pos;
SMALL_RECT Rect;
CHAR_INFO CharInfo;
if (prefix == '[')
{
if (prefix2 == '?' && (suffix == 'h' || suffix == 'l'))
{
if (es_argc == 1 && es_argv[0] == 25)
{
GetConsoleCursorInfo(hConOut, &CursInfo);
CursInfo.bVisible = (suffix == 'h');
SetConsoleCursorInfo(hConOut, &CursInfo);
return;
}
}
// Ignore any other \e[? or \e[> sequences.
if (prefix2 != 0)
return;
GetConsoleScreenBufferInfo(hConOut, &Info);
switch (suffix)
{
case 'm':
if (es_argc == 0) es_argv[es_argc++] = 0;
for (i = 0; i < es_argc; i++)
{
if (30 <= es_argv[i] && es_argv[i] <= 37)
grm.foreground = es_argv[i] - 30;
else if (40 <= es_argv[i] && es_argv[i] <= 47)
grm.background = es_argv[i] - 40;
else switch (es_argv[i])
{
case 0:
case 39:
case 49:
{
TCHAR def[4];
int a;
*def = '7'; def[1] = '\0';
GetEnvironmentVariable(L"ANSICON_DEF", def, lenof(def));
a = wcstol(def, NULL, 16);
grm.reverse = FALSE;
if (a < 0)
{
grm.reverse = TRUE;
a = -a;
}
if (es_argv[i] != 49)
grm.foreground = attr2ansi[a & 7];
if (es_argv[i] != 39)
grm.background = attr2ansi[(a >> 4) & 7];
if (es_argv[i] == 0)
{
if (es_argc == 1)
{
grm.bold = a & FOREGROUND_INTENSITY;
grm.underline = a & BACKGROUND_INTENSITY;
}
else
{
grm.bold = 0;
grm.underline = 0;
}
grm.rvideo = 0;
grm.concealed = 0;
}
}
break;
case 1: grm.bold = FOREGROUND_INTENSITY; break;
case 5: // blink
case 4: grm.underline = BACKGROUND_INTENSITY; break;
case 7: grm.rvideo = 1; break;
case 8: grm.concealed = 1; break;
case 21: // oops, this actually turns on double underline
case 22: grm.bold = 0; break;
case 25:
case 24: grm.underline = 0; break;
case 27: grm.rvideo = 0; break;
case 28: grm.concealed = 0; break;
}
}
if (grm.concealed)
{
if (grm.rvideo)
{
attribut = foregroundcolor[grm.foreground]
| backgroundcolor[grm.foreground];
if (grm.bold)
attribut |= FOREGROUND_INTENSITY | BACKGROUND_INTENSITY;
}
else
{
attribut = foregroundcolor[grm.background]
| backgroundcolor[grm.background];
if (grm.underline)
attribut |= FOREGROUND_INTENSITY | BACKGROUND_INTENSITY;
}
}
else if (grm.rvideo)
{
attribut = foregroundcolor[grm.background]
| backgroundcolor[grm.foreground];
if (grm.bold)
attribut |= BACKGROUND_INTENSITY;
if (grm.underline)
attribut |= FOREGROUND_INTENSITY;
}
else
attribut = foregroundcolor[grm.foreground] | grm.bold
| backgroundcolor[grm.background] | grm.underline;
if (grm.reverse)
attribut = ((attribut >> 4) & 15) | ((attribut & 15) << 4);
SetConsoleTextAttribute(hConOut, attribut);
return;
case 'J':
if (es_argc == 0) es_argv[es_argc++] = 0; // ESC[J == ESC[0J
if (es_argc != 1) return;
switch (es_argv[0])
{
case 0: // ESC[0J erase from cursor to end of display
len = (Info.dwSize.Y - Info.dwCursorPosition.Y - 1) * Info.dwSize.X
+ Info.dwSize.X - Info.dwCursorPosition.X - 1;
FillConsoleOutputCharacter(hConOut, ' ', len,
Info.dwCursorPosition,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes, len,
Info.dwCursorPosition,
&NumberOfCharsWritten);
return;
case 1: // ESC[1J erase from start to cursor.
Pos.X = 0;
Pos.Y = 0;
len = Info.dwCursorPosition.Y * Info.dwSize.X
+ Info.dwCursorPosition.X + 1;
FillConsoleOutputCharacter(hConOut, ' ', len, Pos,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes, len, Pos,
&NumberOfCharsWritten);
return;
case 2: // ESC[2J Clear screen and home cursor
Pos.X = 0;
Pos.Y = 0;
len = Info.dwSize.X * Info.dwSize.Y;
FillConsoleOutputCharacter(hConOut, ' ', len, Pos,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes, len, Pos,
&NumberOfCharsWritten);
SetConsoleCursorPosition(hConOut, Pos);
return;
default:
return;
}
case 'K':
if (es_argc == 0) es_argv[es_argc++] = 0; // ESC[K == ESC[0K
if (es_argc != 1) return;
switch (es_argv[0])
{
case 0: // ESC[0K Clear to end of line
len = Info.dwSize.X - Info.dwCursorPosition.X + 1;
FillConsoleOutputCharacter(hConOut, ' ', len,
Info.dwCursorPosition,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes, len,
Info.dwCursorPosition,
&NumberOfCharsWritten);
return;
case 1: // ESC[1K Clear from start of line to cursor
Pos.X = 0;
Pos.Y = Info.dwCursorPosition.Y;
FillConsoleOutputCharacter(hConOut, ' ',
Info.dwCursorPosition.X + 1, Pos,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes,
Info.dwCursorPosition.X + 1, Pos,
&NumberOfCharsWritten);
return;
case 2: // ESC[2K Clear whole line.
Pos.X = 0;
Pos.Y = Info.dwCursorPosition.Y;
FillConsoleOutputCharacter(hConOut, ' ', Info.dwSize.X, Pos,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes,
Info.dwSize.X, Pos,
&NumberOfCharsWritten);
return;
default:
return;
}
case 'X': // ESC[#X Erase # characters.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[X == ESC[1X
if (es_argc != 1) return;
FillConsoleOutputCharacter(hConOut, ' ', es_argv[0],
Info.dwCursorPosition,
&NumberOfCharsWritten);
FillConsoleOutputAttribute(hConOut, Info.wAttributes, es_argv[0],
Info.dwCursorPosition,
&NumberOfCharsWritten);
return;
case 'L': // ESC[#L Insert # blank lines.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[L == ESC[1L
if (es_argc != 1) return;
Rect.Left = 0;
Rect.Top = Info.dwCursorPosition.Y;
Rect.Right = Info.dwSize.X - 1;
Rect.Bottom = Info.dwSize.Y - 1;
Pos.X = 0;
Pos.Y = Info.dwCursorPosition.Y + es_argv[0];
CharInfo.Char.UnicodeChar = ' ';
CharInfo.Attributes = Info.wAttributes;
ScrollConsoleScreenBuffer(hConOut, &Rect, NULL, Pos, &CharInfo);
return;
case 'M': // ESC[#M Delete # lines.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[M == ESC[1M
if (es_argc != 1) return;
if (es_argv[0] > Info.dwSize.Y - Info.dwCursorPosition.Y)
es_argv[0] = Info.dwSize.Y - Info.dwCursorPosition.Y;
Rect.Left = 0;
Rect.Top = Info.dwCursorPosition.Y + es_argv[0];
Rect.Right = Info.dwSize.X - 1;
Rect.Bottom = Info.dwSize.Y - 1;
Pos.X = 0;
Pos.Y = Info.dwCursorPosition.Y;
CharInfo.Char.UnicodeChar = ' ';
CharInfo.Attributes = Info.wAttributes;
ScrollConsoleScreenBuffer(hConOut, &Rect, NULL, Pos, &CharInfo);
return;
case 'P': // ESC[#P Delete # characters.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[P == ESC[1P
if (es_argc != 1) return;
if (Info.dwCursorPosition.X + es_argv[0] > Info.dwSize.X - 1)
es_argv[0] = Info.dwSize.X - Info.dwCursorPosition.X;
Rect.Left = Info.dwCursorPosition.X + es_argv[0];
Rect.Top = Info.dwCursorPosition.Y;
Rect.Right = Info.dwSize.X - 1;
Rect.Bottom = Info.dwCursorPosition.Y;
CharInfo.Char.UnicodeChar = ' ';
CharInfo.Attributes = Info.wAttributes;
ScrollConsoleScreenBuffer(hConOut, &Rect, NULL, Info.dwCursorPosition,
&CharInfo);
return;
case '@': // ESC[#@ Insert # blank characters.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[@ == ESC[1@
if (es_argc != 1) return;
if (Info.dwCursorPosition.X + es_argv[0] > Info.dwSize.X - 1)
es_argv[0] = Info.dwSize.X - Info.dwCursorPosition.X;
Rect.Left = Info.dwCursorPosition.X;
Rect.Top = Info.dwCursorPosition.Y;
Rect.Right = Info.dwSize.X - 1 - es_argv[0];
Rect.Bottom = Info.dwCursorPosition.Y;
Pos.X = Info.dwCursorPosition.X + es_argv[0];
Pos.Y = Info.dwCursorPosition.Y;
CharInfo.Char.UnicodeChar = ' ';
CharInfo.Attributes = Info.wAttributes;
ScrollConsoleScreenBuffer(hConOut, &Rect, NULL, Pos, &CharInfo);
return;
case 'k': // ESC[#k
case 'A': // ESC[#A Moves cursor up # lines
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[A == ESC[1A
if (es_argc != 1) return;
Pos.Y = Info.dwCursorPosition.Y - es_argv[0];
if (Pos.Y < 0) Pos.Y = 0;
Pos.X = Info.dwCursorPosition.X;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'e': // ESC[#e
case 'B': // ESC[#B Moves cursor down # lines
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[B == ESC[1B
if (es_argc != 1) return;
Pos.Y = Info.dwCursorPosition.Y + es_argv[0];
if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1;
Pos.X = Info.dwCursorPosition.X;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'a': // ESC[#a
case 'C': // ESC[#C Moves cursor forward # spaces
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[C == ESC[1C
if (es_argc != 1) return;
Pos.X = Info.dwCursorPosition.X + es_argv[0];
if (Pos.X >= Info.dwSize.X) Pos.X = Info.dwSize.X - 1;
Pos.Y = Info.dwCursorPosition.Y;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'j': // ESC[#j
case 'D': // ESC[#D Moves cursor back # spaces
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[D == ESC[1D
if (es_argc != 1) return;
Pos.X = Info.dwCursorPosition.X - es_argv[0];
if (Pos.X < 0) Pos.X = 0;
Pos.Y = Info.dwCursorPosition.Y;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'E': // ESC[#E Moves cursor down # lines, column 1.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[E == ESC[1E
if (es_argc != 1) return;
Pos.Y = Info.dwCursorPosition.Y + es_argv[0];
if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1;
Pos.X = 0;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'F': // ESC[#F Moves cursor up # lines, column 1.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[F == ESC[1F
if (es_argc != 1) return;
Pos.Y = Info.dwCursorPosition.Y - es_argv[0];
if (Pos.Y < 0) Pos.Y = 0;
Pos.X = 0;
SetConsoleCursorPosition(hConOut, Pos);
return;
case '`': // ESC[#`
case 'G': // ESC[#G Moves cursor column # in current row.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[G == ESC[1G
if (es_argc != 1) return;
Pos.X = es_argv[0] - 1;
if (Pos.X >= Info.dwSize.X) Pos.X = Info.dwSize.X - 1;
if (Pos.X < 0) Pos.X = 0;
Pos.Y = Info.dwCursorPosition.Y;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'd': // ESC[#d Moves cursor row #, current column.
if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[d == ESC[1d
if (es_argc != 1) return;
Pos.Y = es_argv[0] - 1;
if (Pos.Y < 0) Pos.Y = 0;
if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 'f': // ESC[#;#f
case 'H': // ESC[#;#H Moves cursor to line #, column #
if (es_argc == 0)
es_argv[es_argc++] = 1; // ESC[H == ESC[1;1H
if (es_argc == 1)
es_argv[es_argc++] = 1; // ESC[#H == ESC[#;1H
if (es_argc > 2) return;
Pos.X = es_argv[1] - 1;
if (Pos.X < 0) Pos.X = 0;
if (Pos.X >= Info.dwSize.X) Pos.X = Info.dwSize.X - 1;
Pos.Y = es_argv[0] - 1;
if (Pos.Y < 0) Pos.Y = 0;
if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1;
SetConsoleCursorPosition(hConOut, Pos);
return;
case 's': // ESC[s Saves cursor position for recall later
if (es_argc != 0) return;
SavePos = Info.dwCursorPosition;
return;
case 'u': // ESC[u Return to saved cursor position
if (es_argc != 0) return;
SetConsoleCursorPosition(hConOut, SavePos);
return;
case 'n': // ESC[#n Device status report
if (es_argc != 1) return; // ESC[n == ESC[0n -> ignored
switch (es_argv[0])
{
case 5: // ESC[5n Report status
SendSequence(L"\33[0n"); // "OK"
return;
case 6: // ESC[6n Report cursor position
{
TCHAR buf[32];
wsprintf(buf, L"\33[%d;%dR", Info.dwCursorPosition.Y + 1,
Info.dwCursorPosition.X + 1);
SendSequence(buf);
}
return;
default:
return;
}
case 't': // ESC[#t Window manipulation
if (es_argc != 1) return;
if (es_argv[0] == 21) // ESC[21t Report xterm window's title
{
TCHAR buf[MAX_PATH * 2];
DWORD len = GetConsoleTitle(buf + 3, lenof(buf) - 3 - 2);
// Too bad if it's too big or fails.
buf[0] = ESC;
buf[1] = ']';
buf[2] = 'l';
buf[3 + len] = ESC;
buf[3 + len + 1] = '\\';
buf[3 + len + 2] = '\0';
SendSequence(buf);
}
return;
default:
return;
}
}
else // (prefix == ']')
{
// Ignore any \e]? or \e]> sequences.
if (prefix2 != 0)
return;
if (es_argc == 1 && es_argv[0] == 0) // ESC]0;titleST
{
SetConsoleTitle(Pt_arg);
}
}
}
//-----------------------------------------------------------------------------
// ParseAndPrintANSIString(hDev, lpBuffer, nNumberOfBytesToWrite)
// Parses the string lpBuffer, interprets the escapes sequences and prints the
// characters in the device hDev (console).
// The lexer is a three states automata.
// If the number of arguments es_argc > MAX_ARG, only the MAX_ARG-1 firsts and
// the last arguments are processed (no es_argv[] overflow).
//-----------------------------------------------------------------------------
inline BOOL ParseAndPrintANSIString(HANDLE hDev, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten)
{
DWORD i;
LPCSTR s;
if (hDev != hConOut) // reinit if device has changed
{
hConOut = hDev;
state = 1;
shifted = FALSE;
}
for (i = nNumberOfBytesToWrite, s = (LPCSTR)lpBuffer; i > 0; i--, s++)
{
if (state == 1)
{
if (*s == ESC) state = 2;
else if (*s == SO) shifted = TRUE;
else if (*s == SI) shifted = FALSE;
else PushBuffer(*s);
}
else if (state == 2)
{
if (*s == ESC); // \e\e...\e == \e
else if ((*s == '[') || (*s == ']'))
{
FlushBuffer();
prefix = *s;
prefix2 = 0;
state = 3;
Pt_len = 0;
*Pt_arg = '\0';
}
else if (*s == ')' || *s == '(') state = 6;
else state = 1;
}
else if (state == 3)
{
if (is_digit(*s))
{
es_argc = 0;
es_argv[0] = *s - '0';
state = 4;
}
else if (*s == ';')
{
es_argc = 1;
es_argv[0] = 0;
es_argv[1] = 0;
state = 4;
}
else if (*s == '?' || *s == '>')
{
prefix2 = *s;
}
else
{
es_argc = 0;
suffix = *s;
InterpretEscSeq();
state = 1;
}
}
else if (state == 4)
{
if (is_digit(*s))
{
es_argv[es_argc] = 10 * es_argv[es_argc] + (*s - '0');
}
else if (*s == ';')
{
if (es_argc < MAX_ARG - 1) es_argc++;
es_argv[es_argc] = 0;
if (prefix == ']')
state = 5;
}
else
{
es_argc++;
suffix = *s;
InterpretEscSeq();
state = 1;
}
}
else if (state == 5)
{
if (*s == BEL)
{
Pt_arg[Pt_len] = '\0';
InterpretEscSeq();
state = 1;
}
else if (*s == '\\' && Pt_len > 0 && Pt_arg[Pt_len - 1] == ESC)
{
Pt_arg[--Pt_len] = '\0';
InterpretEscSeq();
state = 1;
}
else if (Pt_len < lenof(Pt_arg) - 1)
Pt_arg[Pt_len++] = *s;
}
else if (state == 6)
{
// Ignore it (ESC ) 0 is implicit; nothing else is supported).
state = 1;
}
}
FlushBuffer();
if (lpNumberOfBytesWritten != NULL)
*lpNumberOfBytesWritten = nNumberOfBytesToWrite - i;
return (i == 0);
}
} // namespace ansi
HANDLE hOut;
HANDLE hIn;
DWORD consolemode;
inline int win32read(char *c) {
DWORD foo;
INPUT_RECORD b;
KEY_EVENT_RECORD e;
BOOL altgr;
while (1) {
if (!ReadConsoleInput(hIn, &b, 1, &foo)) return 0;
if (!foo) return 0;
if (b.EventType == KEY_EVENT && b.Event.KeyEvent.bKeyDown) {
e = b.Event.KeyEvent;
*c = b.Event.KeyEvent.uChar.AsciiChar;
altgr = e.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED);
if (e.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED) && !altgr) {
/* Ctrl+Key */
switch (*c) {
case 'D':
*c = 4;
return 1;
case 'C':
*c = 3;
return 1;
case 'H':
*c = 8;
return 1;
case 'T':
*c = 20;
return 1;
case 'B': /* ctrl-b, left_arrow */
*c = 2;
return 1;
case 'F': /* ctrl-f right_arrow*/
*c = 6;
return 1;
case 'P': /* ctrl-p up_arrow*/
*c = 16;
return 1;
case 'N': /* ctrl-n down_arrow*/
*c = 14;
return 1;
case 'U': /* Ctrl+u, delete the whole line. */
*c = 21;
return 1;
case 'K': /* Ctrl+k, delete from current to end of line. */
*c = 11;
return 1;
case 'A': /* Ctrl+a, go to the start of the line */
*c = 1;
return 1;
case 'E': /* ctrl+e, go to the end of the line */
*c = 5;
return 1;
}
/* Other Ctrl+KEYs ignored */
} else {
switch (e.wVirtualKeyCode) {
case VK_ESCAPE: /* ignore - send ctrl-c, will return -1 */
*c = 3;
return 1;
case VK_RETURN: /* enter */
*c = 13;
return 1;
case VK_LEFT: /* left */
*c = 2;
return 1;
case VK_RIGHT: /* right */
*c = 6;
return 1;
case VK_UP: /* up */
*c = 16;
return 1;
case VK_DOWN: /* down */
*c = 14;
return 1;
case VK_HOME:
*c = 1;
return 1;
case VK_END:
*c = 5;
return 1;
case VK_BACK:
*c = 8;
return 1;
case VK_DELETE:
*c = 127;
return 1;
default:
if (*c) return 1;
}
}
}
}
return -1; /* Makes compiler happy */
}
inline int win32_write(int fd, const void *buffer, unsigned int count) {
if (fd == _fileno(stdout)) {
DWORD bytesWritten = 0;
if (FALSE != ansi::ParseAndPrintANSIString(GetStdHandle(STD_OUTPUT_HANDLE), buffer, (DWORD)count, &bytesWritten)) {
return (int)bytesWritten;
} else {
errno = GetLastError();
return 0;
}
} else if (fd == _fileno(stderr)) {
DWORD bytesWritten = 0;
if (FALSE != ansi::ParseAndPrintANSIString(GetStdHandle(STD_ERROR_HANDLE), buffer, (DWORD)count, &bytesWritten)) {
return (int)bytesWritten;
} else {
errno = GetLastError();
return 0;
}
} else {
return _write(fd, buffer, count);
}
}
#endif // _WIN32
#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
#define LINENOISE_MAX_LINE 4096
static const char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
static CompletionCallback completionCallback;
#ifndef _WIN32
static struct termios orig_termios; /* In order to restore at exit.*/
#endif
static bool rawmode = false; /* For atexit() function to check if restore is needed*/
static bool mlmode = false; /* Multi line mode. Default is single line. */
static bool atexit_registered = false; /* Register atexit just 1 time. */
static size_t history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
static std::vector<std::string> history;
/* The linenoiseState structure represents the state during line editing.
* We pass this state to functions implementing specific editing
* functionalities. */
struct linenoiseState {
int ifd; /* Terminal stdin file descriptor. */
int ofd; /* Terminal stdout file descriptor. */
char *buf; /* Edited line buffer. */
size_t buflen; /* Edited line buffer size. */
std::string prompt; /* Prompt to display. */
size_t pos; /* Current cursor position. */
size_t oldpos; /* Previous refresh cursor position. */
size_t len; /* Current edited line length. */
size_t cols; /* Number of columns in terminal. */
size_t maxrows; /* Maximum num of rows used so far (multiline mode) */
int history_index; /* The history index we are currently editing. */
};
enum KEY_ACTION {
KEY_NULL = 0, /* NULL */
CTRL_A = 1, /* Ctrl+a */
CTRL_B = 2, /* Ctrl-b */
CTRL_C = 3, /* Ctrl-c */
CTRL_D = 4, /* Ctrl-d */
CTRL_E = 5, /* Ctrl-e */
CTRL_F = 6, /* Ctrl-f */
CTRL_H = 8, /* Ctrl-h */
TAB = 9, /* Tab */
CTRL_K = 11, /* Ctrl+k */
CTRL_L = 12, /* Ctrl+l */
ENTER = 13, /* Enter */
CTRL_N = 14, /* Ctrl-n */
CTRL_P = 16, /* Ctrl-p */
CTRL_T = 20, /* Ctrl-t */
CTRL_U = 21, /* Ctrl+u */
CTRL_W = 23, /* Ctrl+w */
ESC = 27, /* Escape */
BACKSPACE = 127 /* Backspace */
};
void linenoiseAtExit(void);
bool AddHistory(const char *line);
void refreshLine(struct linenoiseState *l);
/* ======================= Low level terminal handling ====================== */
/* Set if to use or not the multi line mode. */
inline void SetMultiLine(bool ml) {
mlmode = ml;
}
/* Return true if the terminal name is in the list of terminals we know are
* not able to understand basic escape sequences. */
inline bool isUnsupportedTerm(void) {
#ifndef _WIN32
char *term = getenv("TERM");
int j;
if (term == NULL) return false;
for (j = 0; unsupported_term[j]; j++)
if (!strcasecmp(term,unsupported_term[j])) return true;
#endif
return false;
}
/* Raw mode: 1960 magic shit. */
inline bool enableRawMode(int fd) {
#ifndef _WIN32
struct termios raw;
if (!isatty(STDIN_FILENO)) goto fatal;
if (!atexit_registered) {
atexit(linenoiseAtExit);
atexit_registered = true;
}
if (tcgetattr(fd,&orig_termios) == -1) goto fatal;
raw = orig_termios; /* modify the original mode */
/* input modes: no break, no CR to NL, no parity check, no strip char,
* no start/stop output control. */
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
/* output modes - disable post processing */
raw.c_oflag &= ~(OPOST);
/* control modes - set 8 bit chars */
raw.c_cflag |= (CS8);
/* local modes - choing off, canonical off, no extended functions,
* no signal chars (^Z,^C) */
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
/* control chars - set return condition: min number of bytes and timer.
* We want read to return every single byte, without timeout. */
raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */
/* put terminal in raw mode after flushing */
if (tcsetattr(fd,TCSAFLUSH,&raw) < 0) goto fatal;
rawmode = true;
#else
if (!atexit_registered) {
/* Init windows console handles only once */
hOut = GetStdHandle(STD_OUTPUT_HANDLE);
if (hOut==INVALID_HANDLE_VALUE) goto fatal;
if (!GetConsoleMode(hOut, &consolemode)) {
CloseHandle(hOut);
errno = ENOTTY;
return false;
};
hIn = GetStdHandle(STD_INPUT_HANDLE);
if (hIn == INVALID_HANDLE_VALUE) {
CloseHandle(hOut);
errno = ENOTTY;
return false;
}
GetConsoleMode(hIn, &consolemode);
SetConsoleMode(hIn, ENABLE_PROCESSED_INPUT);
/* Cleanup them at exit */
atexit(linenoiseAtExit);
atexit_registered = true;
}
rawmode = true;
#endif
return true;
fatal:
errno = ENOTTY;
return false;
}
inline void disableRawMode(int fd) {
#ifdef _WIN32
rawmode = false;
#else
/* Don't even check the return value as it's too late. */
if (rawmode && tcsetattr(fd,TCSAFLUSH,&orig_termios) != -1)
rawmode = false;
#endif
}
/* Use the ESC [6n escape sequence to query the horizontal cursor position
* and return it. On error -1 is returned, on success the position of the
* cursor. */
inline int getCursorPosition(int ifd, int ofd) {
char buf[32];
int cols, rows;
unsigned int i = 0;
/* Report cursor location */
if (write(ofd, "\x1b[6n", 4) != 4) return -1;
/* Read the response: ESC [ rows ; cols R */
while (i < sizeof(buf)-1) {
if (read(ifd,buf+i,1) != 1) break;
if (buf[i] == 'R') break;
i++;
}
buf[i] = '\0';
/* Parse it. */
if (buf[0] != ESC || buf[1] != '[') return -1;
if (sscanf(buf+2,"%d;%d",&rows,&cols) != 2) return -1;
return cols;
}
/* Try to get the number of columns in the current terminal, or assume 80
* if it fails. */
inline int getColumns(int ifd, int ofd) {
#ifdef _WIN32
CONSOLE_SCREEN_BUFFER_INFO b;
if (!GetConsoleScreenBufferInfo(hOut, &b)) return 80;
return b.srWindow.Right - b.srWindow.Left;
#else
struct winsize ws;
if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
/* ioctl() failed. Try to query the terminal itself. */
int start, cols;
/* Get the initial position so we can restore it later. */
start = getCursorPosition(ifd,ofd);
if (start == -1) goto failed;
/* Go to right margin and get position. */
if (write(ofd,"\x1b[999C",6) != 6) goto failed;
cols = getCursorPosition(ifd,ofd);
if (cols == -1) goto failed;
/* Restore position. */
if (cols > start) {
char seq[32];
snprintf(seq,32,"\x1b[%dD",cols-start);
if (write(ofd,seq,strlen(seq)) == -1) {
/* Can't recover... */
}
}
return cols;
} else {
return ws.ws_col;
}
failed:
return 80;
#endif
}
/* Clear the screen. Used to handle ctrl+l */
inline void linenoiseClearScreen(void) {
if (write(STDOUT_FILENO,"\x1b[H\x1b[2J",7) <= 0) {
/* nothing to do, just to avoid warning. */
}
}
/* Beep, used for completion when there is nothing to complete or when all
* the choices were already shown. */
inline void linenoiseBeep(void) {
fprintf(stderr, "\x7");
fflush(stderr);
}
/* ============================== Completion ================================ */
/* This is an helper function for linenoiseEdit() and is called when the
* user types the <tab> key in order to complete the string currently in the
* input.
*
* The state of the editing is encapsulated into the pointed linenoiseState
* structure as described in the structure definition. */
inline int completeLine(struct linenoiseState *ls) {
std::vector<std::string> lc;
int nread, nwritten;
char c = 0;
completionCallback(ls->buf,lc);
if (lc.empty()) {
linenoiseBeep();
} else {
size_t stop = 0, i = 0;
while(!stop) {
/* Show completion or original buffer */
if (i < lc.size()) {
struct linenoiseState saved = *ls;
ls->len = ls->pos = lc[i].size();
ls->buf = &lc[i][0];
refreshLine(ls);
ls->len = saved.len;
ls->pos = saved.pos;
ls->buf = saved.buf;
} else {
refreshLine(ls);
}
nread = read(ls->ifd,&c,1);
if (nread <= 0) {
return -1;
}
switch(c) {
case 9: /* tab */
i = (i+1) % (lc.size()+1);
if (i == lc.size()) linenoiseBeep();
break;
case 27: /* escape */
/* Re-show original buffer */
if (i < lc.size()) refreshLine(ls);
stop = 1;
break;
default:
/* Update buffer and return */
if (i < lc.size()) {
nwritten = snprintf(ls->buf,ls->buflen,"%s",&lc[i][0]);
ls->len = ls->pos = nwritten;
}
stop = 1;
break;
}
}
}
return c; /* Return last read character */
}
/* Register a callback function to be called for tab-completion. */
void SetCompletionCallback(CompletionCallback fn) {
completionCallback = fn;
}
/* =========================== Line editing ================================= */
/* Single line low level line refresh.
*
* Rewrite the currently edited line accordingly to the buffer content,
* cursor position, and number of columns of the terminal. */
inline void refreshSingleLine(struct linenoiseState *l) {
char seq[64];
size_t plen = l->prompt.length();
int fd = l->ofd;
char *buf = l->buf;
size_t len = l->len;
size_t pos = l->pos;
std::string ab;
while((plen+pos) >= l->cols) {
buf++;
len--;
pos--;
}
while (plen+len > l->cols) {
len--;
}
/* Cursor to left edge */
snprintf(seq,64,"\r");
ab += seq;
/* Write the prompt and the current buffer content */
ab += l->prompt;
ab.append(buf, len);
/* Erase to right */
snprintf(seq,64,"\x1b[0K");
ab += seq;
/* Move cursor to original position. */
snprintf(seq,64,"\r\x1b[%dC", (int)(pos+plen));
ab += seq;
if (write(fd,ab.c_str(),ab.length()) == -1) {} /* Can't recover from write error. */
}
/* Multi line low level line refresh.
*
* Rewrite the currently edited line accordingly to the buffer content,
* cursor position, and number of columns of the terminal. */
inline void refreshMultiLine(struct linenoiseState *l) {
char seq[64];
auto plen = l->prompt.length();
int rows = (int)((plen+l->len+l->cols-1)/l->cols); /* rows used by current buf. */
int rpos = (int)((plen+l->oldpos+l->cols)/l->cols); /* cursor relative row. */
int rpos2; /* rpos after refresh. */
int col; /* colum position, zero-based. */
int old_rows = (int)l->maxrows;
int fd = l->ofd, j;
std::string ab;
/* Update maxrows if needed. */
if (rows > (int)l->maxrows) l->maxrows = rows;
/* First step: clear all the lines used before. To do so start by
* going to the last row. */
if (old_rows-rpos > 0) {
snprintf(seq,64,"\x1b[%dB", old_rows-rpos);
ab += seq;
}
/* Now for every row clear it, go up. */
for (j = 0; j < old_rows-1; j++) {
snprintf(seq,64,"\r\x1b[0K\x1b[1A");
ab += seq;
}
/* Clean the top line. */
snprintf(seq,64,"\r\x1b[0K");
ab += seq;
/* Write the prompt and the current buffer content */
ab += l->prompt;
ab.append(l->buf, l->len);
/* If we are at the very end of the screen with our prompt, we need to
* emit a newline and move the prompt to the first column. */
if (l->pos &&
l->pos == l->len &&
(l->pos+plen) % l->cols == 0)
{
ab += "\n";
snprintf(seq,64,"\r");
ab += seq;
rows++;
if (rows > (int)l->maxrows) l->maxrows = rows;
}
/* Move cursor to right position. */
rpos2 = (int)((plen+l->pos+l->cols)/l->cols); /* current cursor relative row. */
/* Go up till we reach the expected positon. */
if (rows-rpos2 > 0) {
snprintf(seq,64,"\x1b[%dA", rows-rpos2);
ab += seq;
}
/* Set column. */
col = (plen+(int)l->pos) % (int)l->cols;
if (col)
snprintf(seq,64,"\r\x1b[%dC", col);
else
snprintf(seq,64,"\r");
ab += seq;
l->oldpos = l->pos;
if (write(fd,ab.c_str(),ab.length()) == -1) {} /* Can't recover from write error. */
}
/* Calls the two low level functions refreshSingleLine() or
* refreshMultiLine() according to the selected mode. */
inline void refreshLine(struct linenoiseState *l) {
if (mlmode)
refreshMultiLine(l);
else
refreshSingleLine(l);
}
/* Insert the character 'c' at cursor current position.
*
* On error writing to the terminal -1 is returned, otherwise 0. */
int linenoiseEditInsert(struct linenoiseState *l, char c) {
if (l->len < l->buflen) {
if (l->len == l->pos) {
l->buf[l->pos] = c;
l->pos++;
l->len++;
l->buf[l->len] = '\0';
if ((!mlmode && l->prompt.length()+l->len < l->cols) /* || mlmode */) {
/* Avoid a full update of the line in the
* trivial case. */
if (write(l->ofd,&c,1) == -1) return -1;
} else {
refreshLine(l);
}
} else {
memmove(l->buf+l->pos+1,l->buf+l->pos,l->len-l->pos);
l->buf[l->pos] = c;
l->len++;
l->pos++;
l->buf[l->len] = '\0';
refreshLine(l);
}
}
return 0;
}
/* Move cursor on the left. */
void linenoiseEditMoveLeft(struct linenoiseState *l) {
if (l->pos > 0) {
l->pos--;
refreshLine(l);
}
}
/* Move cursor on the right. */
void linenoiseEditMoveRight(struct linenoiseState *l) {
if (l->pos != l->len) {
l->pos++;
refreshLine(l);
}
}
/* Move cursor to the start of the line. */
inline void linenoiseEditMoveHome(struct linenoiseState *l) {
if (l->pos != 0) {
l->pos = 0;
refreshLine(l);
}
}
/* Move cursor to the end of the line. */
inline void linenoiseEditMoveEnd(struct linenoiseState *l) {
if (l->pos != l->len) {
l->pos = l->len;
refreshLine(l);
}
}
/* Substitute the currently edited line with the next or previous history
* entry as specified by 'dir'. */
#define LINENOISE_HISTORY_NEXT 0
#define LINENOISE_HISTORY_PREV 1
inline void linenoiseEditHistoryNext(struct linenoiseState *l, int dir) {
if (history.size() > 1) {
/* Update the current history entry before to
* overwrite it with the next one. */
history[history.size() - 1 - l->history_index] = l->buf;
/* Show the new entry */
l->history_index += (dir == LINENOISE_HISTORY_PREV) ? 1 : -1;
if (l->history_index < 0) {
l->history_index = 0;
return;
} else if (l->history_index >= (int)history.size()) {
l->history_index = history.size()-1;
return;
}
memset(l->buf, 0, l->buflen);
strcpy(l->buf,history[history.size() - 1 - l->history_index].c_str());
l->len = l->pos = strlen(l->buf);
refreshLine(l);
}
}
/* Delete the character at the right of the cursor without altering the cursor
* position. Basically this is what happens with the "Delete" keyboard key. */
inline void linenoiseEditDelete(struct linenoiseState *l) {
if (l->len > 0 && l->pos < l->len) {
memmove(l->buf+l->pos,l->buf+l->pos+1,l->len-l->pos-1);
l->len--;
l->buf[l->len] = '\0';
refreshLine(l);
}
}
/* Backspace implementation. */
inline void linenoiseEditBackspace(struct linenoiseState *l) {
if (l->pos > 0 && l->len > 0) {
memmove(l->buf+l->pos-1,l->buf+l->pos,l->len-l->pos);
l->pos--;
l->len--;
l->buf[l->len] = '\0';
refreshLine(l);
}
}
/* Delete the previosu word, maintaining the cursor at the start of the
* current word. */
inline void linenoiseEditDeletePrevWord(struct linenoiseState *l) {
size_t old_pos = l->pos;
size_t diff;
while (l->pos > 0 && l->buf[l->pos-1] == ' ')
l->pos--;
while (l->pos > 0 && l->buf[l->pos-1] != ' ')
l->pos--;
diff = old_pos - l->pos;
memmove(l->buf+l->pos,l->buf+old_pos,l->len-old_pos+1);
l->len -= diff;
refreshLine(l);
}
/* This function is the core of the line editing capability of linenoise.
* It expects 'fd' to be already in "raw mode" so that every key pressed
* will be returned ASAP to read().
*
* The resulting string is put into 'buf' when the user type enter, or
* when ctrl+d is typed.
*
* The function returns the length of the current buffer. */
inline int linenoiseEdit(int stdin_fd, int stdout_fd, char *buf, size_t buflen, const char *prompt)
{
struct linenoiseState l;
/* Populate the linenoise state that we pass to functions implementing
* specific editing functionalities. */
l.ifd = stdin_fd;
l.ofd = stdout_fd;
l.buf = buf;
l.buflen = buflen;
l.prompt = prompt;
l.oldpos = l.pos = 0;
l.len = 0;
l.cols = getColumns(stdin_fd, stdout_fd);
l.maxrows = 0;
l.history_index = 0;
/* Buffer starts empty. */
l.buf[0] = '\0';
l.buflen--; /* Make sure there is always space for the nulterm */
/* The latest history entry is always our current buffer, that
* initially is just an empty string. */
AddHistory("");
if (write(l.ofd,prompt,l.prompt.length()) == -1) return -1;
while(1) {
char c;
int nread;
char seq[3];
#ifdef _WIN32
nread = win32read(&c);
#else
nread = read(l.ifd,&c,1);
#endif
if (nread <= 0) return (int)l.len;
/* Only autocomplete when the callback is set. It returns < 0 when
* there was an error reading from fd. Otherwise it will return the
* character that should be handled next. */
if (c == 9 && completionCallback != NULL) {
c = completeLine(&l);
/* Return on errors */
if (c < 0) return (int)l.len;
/* Read next character when 0 */
if (c == 0) continue;
}
switch(c) {
case ENTER: /* enter */
history.pop_back();
if (mlmode) linenoiseEditMoveEnd(&l);
return (int)l.len;
case CTRL_C: /* ctrl-c */
errno = EAGAIN;
return -1;
case BACKSPACE: /* backspace */
case 8: /* ctrl-h */
linenoiseEditBackspace(&l);
break;
case CTRL_D: /* ctrl-d, remove char at right of cursor, or if the
line is empty, act as end-of-file. */
if (l.len > 0) {
linenoiseEditDelete(&l);
} else {
history.pop_back();
return -1;
}
break;
case CTRL_T: /* ctrl-t, swaps current character with previous. */
if (l.pos > 0 && l.pos < l.len) {
int aux = buf[l.pos-1];
buf[l.pos-1] = buf[l.pos];
buf[l.pos] = aux;
if (l.pos != l.len-1) l.pos++;
refreshLine(&l);
}
break;
case CTRL_B: /* ctrl-b */
linenoiseEditMoveLeft(&l);
break;
case CTRL_F: /* ctrl-f */
linenoiseEditMoveRight(&l);
break;
case CTRL_P: /* ctrl-p */
linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV);
break;
case CTRL_N: /* ctrl-n */
linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT);
break;
case ESC: /* escape sequence */
/* Read the next two bytes representing the escape sequence.
* Use two calls to handle slow terminals returning the two
* chars at different times. */
if (read(l.ifd,seq,1) == -1) break;
if (read(l.ifd,seq+1,1) == -1) break;
/* ESC [ sequences. */
if (seq[0] == '[') {
if (seq[1] >= '0' && seq[1] <= '9') {
/* Extended escape, read additional byte. */
if (read(l.ifd,seq+2,1) == -1) break;
if (seq[2] == '~') {
switch(seq[1]) {
case '3': /* Delete key. */
linenoiseEditDelete(&l);
break;
}
}
} else {
switch(seq[1]) {
case 'A': /* Up */
linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV);
break;
case 'B': /* Down */
linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT);
break;
case 'C': /* Right */
linenoiseEditMoveRight(&l);
break;
case 'D': /* Left */
linenoiseEditMoveLeft(&l);
break;
case 'H': /* Home */
linenoiseEditMoveHome(&l);
break;
case 'F': /* End*/
linenoiseEditMoveEnd(&l);
break;
}
}
}
/* ESC O sequences. */
else if (seq[0] == 'O') {
switch(seq[1]) {
case 'H': /* Home */
linenoiseEditMoveHome(&l);
break;
case 'F': /* End*/
linenoiseEditMoveEnd(&l);
break;
}
}
break;
default:
if (linenoiseEditInsert(&l,c)) return -1;
break;
case CTRL_U: /* Ctrl+u, delete the whole line. */
buf[0] = '\0';
l.pos = l.len = 0;
refreshLine(&l);
break;
case CTRL_K: /* Ctrl+k, delete from current to end of line. */
buf[l.pos] = '\0';
l.len = l.pos;
refreshLine(&l);
break;
case CTRL_A: /* Ctrl+a, go to the start of the line */
linenoiseEditMoveHome(&l);
break;
case CTRL_E: /* ctrl+e, go to the end of the line */
linenoiseEditMoveEnd(&l);
break;
case CTRL_L: /* ctrl+l, clear screen */
linenoiseClearScreen();
refreshLine(&l);
break;
case CTRL_W: /* ctrl+w, delete previous word */
linenoiseEditDeletePrevWord(&l);
break;
}
}
return (int)l.len;
}
/* This function calls the line editing function linenoiseEdit() using
* the STDIN file descriptor set in raw mode. */
inline std::string linenoiseRaw(const char *prompt) {
std::string line;
if (!isatty(STDIN_FILENO)) {
/* Not a tty: read from file / pipe. */
std::getline(std::cin, line);
} else {
/* Interactive editing. */
if (enableRawMode(STDIN_FILENO) == false) return line;
char buf[LINENOISE_MAX_LINE];
auto count = linenoiseEdit(STDIN_FILENO, STDOUT_FILENO, buf, LINENOISE_MAX_LINE, prompt);
if (count != -1) {
line.assign(buf, count);
}
disableRawMode(STDIN_FILENO);
printf("\n");
}
return line;
}
/* The high level function that is the main API of the linenoise library.
* This function checks if the terminal has basic capabilities, just checking
* for a blacklist of stupid terminals, and later either calls the line
* editing function or uses dummy fgets() so that you will be able to type
* something even in the most desperate of the conditions. */
inline std::string Readline(const char *prompt) {
if (isUnsupportedTerm()) {
printf("%s",prompt);
fflush(stdout);
std::string line;
std::getline(std::cin, line);
return line;
} else {
return linenoiseRaw(prompt);
}
}
/* ================================ History ================================= */
/* At exit we'll try to fix the terminal to the initial conditions. */
inline void linenoiseAtExit(void) {
disableRawMode(STDIN_FILENO);
}
/* This is the API call to add a new entry in the linenoise history.
* It uses a fixed array of char pointers that are shifted (memmoved)
* when the history max length is reached in order to remove the older
* entry and make room for the new one, so it is not exactly suitable for huge
* histories, but will work well for a few hundred of entries.
*
* Using a circular buffer is smarter, but a bit more complex to handle. */
inline bool AddHistory(const char* line) {
if (history_max_len == 0) return false;
/* Don't add duplicated lines. */
if (!history.empty() && history.back() == line) return false;
/* If we reached the max length, remove the older line. */
if (history.size() == history_max_len) {
history.erase(history.begin());
}
history.push_back(line);
return true;
}
/* Set the maximum length for the history. This function can be called even
* if there is already some history, the function will make sure to retain
* just the latest 'len' elements if the new history length value is smaller
* than the amount of items already inside the history. */
inline bool SetHistoryMaxLen(size_t len) {
if (len < 1) return false;
history_max_len = len;
if (len < history.size()) {
history.resize(len);
}
return true;
}
/* Save the history in the specified file. On success *true* is returned
* otherwise *false* is returned. */
inline bool SaveHistory(const char* path) {
std::ofstream f(path); // TODO: need 'std::ios::binary'?
if (!f) return false;
for (const auto& h: history) {
f << h << std::endl;
}
return true;
}
/* Load the history from the specified file. If the file does not exist
* zero is returned and no operation is performed.
*
* If the file exists and the operation succeeded *true* is returned, otherwise
* on error *false* is returned. */
inline bool LoadHistory(const char* path) {
std::ifstream f(path);
if (!f) return false;
std::string line;
while (std::getline(f, line)) {
AddHistory(line.c_str());
}
return true;
}
inline const std::vector<std::string>& GetHistory() {
return history;
}
} // namespace linenoise
#ifdef _WIN32
#undef snprintf
#undef isatty
#undef write
#undef read
#endif
#endif /* __LINENOISE_HPP */
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