forked from KolibriOS/kolibrios
1534 lines
43 KiB
C
1534 lines
43 KiB
C
/* linenoise.c -- guerrilla line editing library against the idea that a
|
|
* line editing lib needs to be 20,000 lines of C code.
|
|
*
|
|
* You can find the latest source code at:
|
|
*
|
|
* http://github.com/msteveb/linenoise
|
|
* (forked from http://github.com/antirez/linenoise)
|
|
*
|
|
* Does a number of crazy assumptions that happen to be true in 99.9999% of
|
|
* the 2010 UNIX computers around.
|
|
*
|
|
* ------------------------------------------------------------------------
|
|
*
|
|
* Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
|
|
* Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
|
|
* Copyright (c) 2011, Steve Bennett <steveb at workware dot net dot au>
|
|
*
|
|
* 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.
|
|
*
|
|
* ------------------------------------------------------------------------
|
|
*
|
|
* References:
|
|
* - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
|
|
* - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
|
|
*
|
|
* Bloat:
|
|
* - Completion?
|
|
*
|
|
* Unix/termios
|
|
* ------------
|
|
* List of escape sequences used by this program, we do everything just
|
|
* a few sequences. In order to be so cheap we may have some
|
|
* flickering effect with some slow terminal, but the lesser sequences
|
|
* the more compatible.
|
|
*
|
|
* CHA (Cursor Horizontal Absolute)
|
|
* Sequence: ESC [ n G
|
|
* Effect: moves cursor to column n (1 based)
|
|
*
|
|
* EL (Erase Line)
|
|
* Sequence: ESC [ n K
|
|
* Effect: if n is 0 or missing, clear from cursor to end of line
|
|
* Effect: if n is 1, clear from beginning of line to cursor
|
|
* Effect: if n is 2, clear entire line
|
|
*
|
|
* CUF (CUrsor Forward)
|
|
* Sequence: ESC [ n C
|
|
* Effect: moves cursor forward of n chars
|
|
*
|
|
* The following are used to clear the screen: ESC [ H ESC [ 2 J
|
|
* This is actually composed of two sequences:
|
|
*
|
|
* cursorhome
|
|
* Sequence: ESC [ H
|
|
* Effect: moves the cursor to upper left corner
|
|
*
|
|
* ED2 (Clear entire screen)
|
|
* Sequence: ESC [ 2 J
|
|
* Effect: clear the whole screen
|
|
*
|
|
* == For highlighting control characters, we also use the following two ==
|
|
* SO (enter StandOut)
|
|
* Sequence: ESC [ 7 m
|
|
* Effect: Uses some standout mode such as reverse video
|
|
*
|
|
* SE (Standout End)
|
|
* Sequence: ESC [ 0 m
|
|
* Effect: Exit standout mode
|
|
*
|
|
* == Only used if TIOCGWINSZ fails ==
|
|
* DSR/CPR (Report cursor position)
|
|
* Sequence: ESC [ 6 n
|
|
* Effect: reports current cursor position as ESC [ NNN ; MMM R
|
|
*
|
|
* win32/console
|
|
* -------------
|
|
* If __MINGW32__ is defined, the win32 console API is used.
|
|
* This could probably be made to work for the msvc compiler too.
|
|
* This support based in part on work by Jon Griffiths.
|
|
*/
|
|
|
|
#ifdef _WIN32 /* Windows platform, either MinGW or Visual Studio (MSVC) */
|
|
#include <windows.h>
|
|
#define USE_WINCONSOLE
|
|
#ifdef __MINGW32__
|
|
#ifndef HAVE_UNISTD_H
|
|
#define HAVE_UNISTD_H
|
|
#endif
|
|
#else
|
|
/* Microsoft headers don't like old POSIX names */
|
|
#define strdup _strdup
|
|
#define snprintf _snprintf
|
|
#endif
|
|
#else
|
|
#include <termios.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/poll.h>
|
|
#define USE_TERMIOS
|
|
#ifndef HAVE_UNISTD_H
|
|
#define HAVE_UNISTD_H
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "linenoise.h"
|
|
#include "utf8.h"
|
|
|
|
#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
|
|
#define LINENOISE_MAX_LINE 4096
|
|
|
|
#define ctrl(C) ((C) - '@')
|
|
|
|
/* Use -ve numbers here to co-exist with normal unicode chars */
|
|
enum {
|
|
SPECIAL_NONE,
|
|
SPECIAL_UP = -20,
|
|
SPECIAL_DOWN = -21,
|
|
SPECIAL_LEFT = -22,
|
|
SPECIAL_RIGHT = -23,
|
|
SPECIAL_DELETE = -24,
|
|
SPECIAL_HOME = -25,
|
|
SPECIAL_END = -26,
|
|
};
|
|
|
|
static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
|
|
static int history_len = 0;
|
|
static char **history = NULL;
|
|
|
|
/* Structure to contain the status of the current (being edited) line */
|
|
struct current {
|
|
char *buf; /* Current buffer. Always null terminated */
|
|
int bufmax; /* Size of the buffer, including space for the null termination */
|
|
int len; /* Number of bytes in 'buf' */
|
|
int chars; /* Number of chars in 'buf' (utf-8 chars) */
|
|
int pos; /* Cursor position, measured in chars */
|
|
int cols; /* Size of the window, in chars */
|
|
const char *prompt;
|
|
int history_index; /* History index */
|
|
char rev_rbuf[50]; /* Reverse-i-search buffer */
|
|
int rev_rchars; /* Reverse-i-search chars */
|
|
int rev_rlen; /* Reverse-i-search len */
|
|
int rev_searchpos; /* Reverse-i-search pos */
|
|
unsigned int nb:1; /* Non-blocking mode */
|
|
unsigned int new:1; /* This is a new prompt */
|
|
unsigned int rev:2; /* Reverse-i-search mode */
|
|
#ifndef NO_COMPLETION
|
|
unsigned int compl:1; /* Completion mode enabled */
|
|
size_t compl_off; /* Completion offset */
|
|
#endif
|
|
#if defined(USE_TERMIOS)
|
|
int fd; /* Terminal fd */
|
|
#elif defined(USE_WINCONSOLE)
|
|
HANDLE outh; /* Console output handle */
|
|
HANDLE inh; /* Console input handle */
|
|
int rows; /* Screen rows */
|
|
int x; /* Current column during output */
|
|
int y; /* Current row */
|
|
#endif
|
|
};
|
|
|
|
struct ctx {
|
|
unsigned int init:1; /* Context initialized */
|
|
struct current current;
|
|
char buf[LINENOISE_MAX_LINE];
|
|
};
|
|
|
|
static int fd_read(struct current *current);
|
|
static int getWindowSize(struct current *current);
|
|
|
|
void linenoiseHistoryFree(void) {
|
|
if (history) {
|
|
int j;
|
|
|
|
for (j = 0; j < history_len; j++)
|
|
free(history[j]);
|
|
free(history);
|
|
history = NULL;
|
|
}
|
|
}
|
|
|
|
static int rawmode = 0; /* for atexit() function to check if restore is needed*/
|
|
|
|
#if defined(USE_TERMIOS)
|
|
static void linenoiseAtExit(void);
|
|
static struct termios orig_termios; /* in order to restore at exit */
|
|
static int atexit_registered = 0; /* register atexit just 1 time */
|
|
|
|
static const char *unsupported_term[] = {"dumb","cons25",NULL};
|
|
|
|
static int isUnsupportedTerm(void) {
|
|
char *term = getenv("TERM");
|
|
|
|
if (term) {
|
|
int j;
|
|
for (j = 0; unsupported_term[j]; j++) {
|
|
if (strcasecmp(term, unsupported_term[j]) == 0) {
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int enableRawMode(struct current *current) {
|
|
struct termios raw;
|
|
|
|
current->fd = STDIN_FILENO;
|
|
|
|
if (!isatty(current->fd) || isUnsupportedTerm() ||
|
|
tcgetattr(current->fd, &orig_termios) == -1) {
|
|
fatal:
|
|
errno = ENOTTY;
|
|
return -1;
|
|
}
|
|
|
|
if (!atexit_registered) {
|
|
atexit(linenoiseAtExit);
|
|
atexit_registered = 1;
|
|
}
|
|
|
|
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(current->fd,TCSADRAIN,&raw) < 0) {
|
|
goto fatal;
|
|
}
|
|
rawmode = 1;
|
|
|
|
current->cols = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void disableRawMode(struct current *current) {
|
|
/* Don't even check the return value as it's too late. */
|
|
if (rawmode && tcsetattr(current->fd,TCSADRAIN,&orig_termios) != -1)
|
|
rawmode = 0;
|
|
}
|
|
|
|
/* At exit we'll try to fix the terminal to the initial conditions. */
|
|
static void linenoiseAtExit(void) {
|
|
if (rawmode) {
|
|
tcsetattr(STDIN_FILENO, TCSADRAIN, &orig_termios);
|
|
}
|
|
linenoiseHistoryFree();
|
|
}
|
|
|
|
/* gcc/glibc insists that we care about the return code of write! */
|
|
#define IGNORE_RC(EXPR) if (EXPR) {}
|
|
|
|
/* This is fdprintf() on some systems, but use a different
|
|
* name to avoid conflicts
|
|
*/
|
|
static void fd_printf(int fd, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
char buf[64];
|
|
int n;
|
|
|
|
va_start(args, format);
|
|
n = vsnprintf(buf, sizeof(buf), format, args);
|
|
va_end(args);
|
|
IGNORE_RC(write(fd, buf, n));
|
|
}
|
|
|
|
static void clearScreen(struct current *current)
|
|
{
|
|
fd_printf(current->fd, "\x1b[H\x1b[2J");
|
|
}
|
|
|
|
static void cursorToLeft(struct current *current)
|
|
{
|
|
fd_printf(current->fd, "\x1b[1G");
|
|
}
|
|
|
|
static int outputChars(struct current *current, const char *buf, int len)
|
|
{
|
|
return write(current->fd, buf, len);
|
|
}
|
|
|
|
static void outputControlChar(struct current *current, char ch)
|
|
{
|
|
fd_printf(current->fd, "\033[7m^%c\033[0m", ch);
|
|
}
|
|
|
|
static void eraseEol(struct current *current)
|
|
{
|
|
fd_printf(current->fd, "\x1b[0K");
|
|
}
|
|
|
|
static void setCursorPos(struct current *current, int x)
|
|
{
|
|
fd_printf(current->fd, "\x1b[1G\x1b[%dC", x);
|
|
}
|
|
|
|
/**
|
|
* Reads a char from 'fd', waiting at most 'timeout' milliseconds.
|
|
*
|
|
* A timeout of -1 means to wait forever.
|
|
*
|
|
* Returns -1 if no char is received within the time or an error occurs.
|
|
*/
|
|
static int fd_read_char(int fd, int timeout)
|
|
{
|
|
struct pollfd p;
|
|
unsigned char c;
|
|
|
|
p.fd = fd;
|
|
p.events = POLLIN;
|
|
|
|
if (poll(&p, 1, timeout) == 0) {
|
|
/* timeout */
|
|
return -1;
|
|
}
|
|
if (read(fd, &c, 1) != 1) {
|
|
return -1;
|
|
}
|
|
return c;
|
|
}
|
|
|
|
/**
|
|
* Reads a complete utf-8 character
|
|
* and returns the unicode value, or -1 on error.
|
|
*/
|
|
static int fd_read(struct current *current)
|
|
{
|
|
#ifdef USE_UTF8
|
|
char buf[4];
|
|
int n;
|
|
int i;
|
|
int c;
|
|
|
|
if (read(current->fd, &buf[0], 1) != 1) {
|
|
return -1;
|
|
}
|
|
n = utf8_charlen(buf[0]);
|
|
if (n < 1 || n > 3) {
|
|
return -1;
|
|
}
|
|
for (i = 1; i < n; i++) {
|
|
if (read(current->fd, &buf[i], 1) != 1) {
|
|
return -1;
|
|
}
|
|
}
|
|
buf[n] = 0;
|
|
/* decode and return the character */
|
|
utf8_tounicode(buf, &c);
|
|
return c;
|
|
#else
|
|
return fd_read_char(current->fd, (current->nb ? 0 : -1));
|
|
#endif
|
|
}
|
|
|
|
static int getWindowSize(struct current *current)
|
|
{
|
|
struct winsize ws;
|
|
|
|
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 && ws.ws_col != 0) {
|
|
current->cols = ws.ws_col;
|
|
return 0;
|
|
}
|
|
|
|
/* Failed to query the window size. Perhaps we are on a serial terminal.
|
|
* Try to query the width by sending the cursor as far to the right
|
|
* and reading back the cursor position.
|
|
* Note that this is only done once per call to linenoise rather than
|
|
* every time the line is refreshed for efficiency reasons.
|
|
*/
|
|
if (current->cols == 0) {
|
|
current->cols = 80;
|
|
|
|
/* Move cursor far right and report cursor position */
|
|
fd_printf(current->fd, "\x1b[999G" "\x1b[6n");
|
|
|
|
/* Parse the response: ESC [ rows ; cols R */
|
|
if (fd_read_char(current->fd, 100) == 0x1b && fd_read_char(current->fd, 100) == '[') {
|
|
int n = 0;
|
|
while (1) {
|
|
int ch = fd_read_char(current->fd, 100);
|
|
if (ch == ';') {
|
|
/* Ignore rows */
|
|
n = 0;
|
|
}
|
|
else if (ch == 'R') {
|
|
/* Got cols */
|
|
if (n != 0 && n < 1000) {
|
|
current->cols = n;
|
|
}
|
|
break;
|
|
}
|
|
else if (ch >= 0 && ch <= '9') {
|
|
n = n * 10 + ch - '0';
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* If escape (27) was received, reads subsequent
|
|
* chars to determine if this is a known special key.
|
|
*
|
|
* Returns SPECIAL_NONE if unrecognised, or -1 if EOF.
|
|
*
|
|
* If no additional char is received within a short time,
|
|
* 27 is returned.
|
|
*/
|
|
static int check_special(int fd)
|
|
{
|
|
int c = fd_read_char(fd, 50);
|
|
int c2;
|
|
|
|
if (c < 0) {
|
|
return 27;
|
|
}
|
|
|
|
c2 = fd_read_char(fd, 50);
|
|
if (c2 < 0) {
|
|
return c2;
|
|
}
|
|
if (c == '[' || c == 'O') {
|
|
/* Potential arrow key */
|
|
switch (c2) {
|
|
case 'A':
|
|
return SPECIAL_UP;
|
|
case 'B':
|
|
return SPECIAL_DOWN;
|
|
case 'C':
|
|
return SPECIAL_RIGHT;
|
|
case 'D':
|
|
return SPECIAL_LEFT;
|
|
case 'F':
|
|
return SPECIAL_END;
|
|
case 'H':
|
|
return SPECIAL_HOME;
|
|
}
|
|
}
|
|
if (c == '[' && c2 >= '1' && c2 <= '8') {
|
|
/* extended escape */
|
|
c = fd_read_char(fd, 50);
|
|
if (c == '~') {
|
|
switch (c2) {
|
|
case '3':
|
|
return SPECIAL_DELETE;
|
|
case '7':
|
|
return SPECIAL_HOME;
|
|
case '8':
|
|
return SPECIAL_END;
|
|
}
|
|
}
|
|
while (c != -1 && c != '~') {
|
|
/* .e.g \e[12~ or '\e[11;2~ discard the complete sequence */
|
|
c = fd_read_char(fd, 50);
|
|
}
|
|
}
|
|
|
|
return SPECIAL_NONE;
|
|
}
|
|
#elif defined(USE_WINCONSOLE)
|
|
|
|
static DWORD orig_consolemode = 0;
|
|
|
|
static int enableRawMode(struct current *current) {
|
|
DWORD n;
|
|
INPUT_RECORD irec;
|
|
|
|
current->outh = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
current->inh = GetStdHandle(STD_INPUT_HANDLE);
|
|
|
|
if (!PeekConsoleInput(current->inh, &irec, 1, &n)) {
|
|
return -1;
|
|
}
|
|
if (getWindowSize(current) != 0) {
|
|
return -1;
|
|
}
|
|
if (GetConsoleMode(current->inh, &orig_consolemode)) {
|
|
SetConsoleMode(current->inh, ENABLE_PROCESSED_INPUT);
|
|
}
|
|
rawmode = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void disableRawMode(struct current *current)
|
|
{
|
|
SetConsoleMode(current->inh, orig_consolemode);
|
|
}
|
|
|
|
static void clearScreen(struct current *current)
|
|
{
|
|
COORD topleft = { 0, 0 };
|
|
DWORD n;
|
|
|
|
FillConsoleOutputCharacter(current->outh, ' ',
|
|
current->cols * current->rows, topleft, &n);
|
|
FillConsoleOutputAttribute(current->outh,
|
|
FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN,
|
|
current->cols * current->rows, topleft, &n);
|
|
SetConsoleCursorPosition(current->outh, topleft);
|
|
}
|
|
|
|
static void cursorToLeft(struct current *current)
|
|
{
|
|
COORD pos = { 0, current->y };
|
|
DWORD n;
|
|
|
|
FillConsoleOutputAttribute(current->outh,
|
|
FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN, current->cols, pos, &n);
|
|
current->x = 0;
|
|
}
|
|
|
|
static int outputChars(struct current *current, const char *buf, int len)
|
|
{
|
|
COORD pos = { current->x, current->y };
|
|
DWORD n;
|
|
|
|
WriteConsoleOutputCharacter(current->outh, buf, len, pos, &n);
|
|
current->x += len;
|
|
return 0;
|
|
}
|
|
|
|
static void outputControlChar(struct current *current, char ch)
|
|
{
|
|
COORD pos = { current->x, current->y };
|
|
DWORD n;
|
|
|
|
FillConsoleOutputAttribute(current->outh, BACKGROUND_INTENSITY, 2, pos, &n);
|
|
outputChars(current, "^", 1);
|
|
outputChars(current, &ch, 1);
|
|
}
|
|
|
|
static void eraseEol(struct current *current)
|
|
{
|
|
COORD pos = { current->x, current->y };
|
|
DWORD n;
|
|
|
|
FillConsoleOutputCharacter(current->outh, ' ', current->cols - current->x, pos, &n);
|
|
}
|
|
|
|
static void setCursorPos(struct current *current, int x)
|
|
{
|
|
COORD pos = { x, current->y };
|
|
|
|
SetConsoleCursorPosition(current->outh, pos);
|
|
current->x = x;
|
|
}
|
|
|
|
static int fd_read(struct current *current)
|
|
{
|
|
while (1) {
|
|
INPUT_RECORD irec;
|
|
DWORD n;
|
|
if (WaitForSingleObject(current->inh,
|
|
(current->nb ? 0 : INFINITE)) != WAIT_OBJECT_0) {
|
|
break;
|
|
}
|
|
if (!ReadConsoleInput (current->inh, &irec, 1, &n)) {
|
|
break;
|
|
}
|
|
if (irec.EventType == KEY_EVENT && irec.Event.KeyEvent.bKeyDown) {
|
|
KEY_EVENT_RECORD *k = &irec.Event.KeyEvent;
|
|
if (k->dwControlKeyState & ENHANCED_KEY) {
|
|
switch (k->wVirtualKeyCode) {
|
|
case VK_LEFT:
|
|
return SPECIAL_LEFT;
|
|
case VK_RIGHT:
|
|
return SPECIAL_RIGHT;
|
|
case VK_UP:
|
|
return SPECIAL_UP;
|
|
case VK_DOWN:
|
|
return SPECIAL_DOWN;
|
|
case VK_DELETE:
|
|
return SPECIAL_DELETE;
|
|
case VK_HOME:
|
|
return SPECIAL_HOME;
|
|
case VK_END:
|
|
return SPECIAL_END;
|
|
}
|
|
}
|
|
/* Note that control characters are already translated in AsciiChar */
|
|
else {
|
|
#ifdef USE_UTF8
|
|
return k->uChar.UnicodeChar;
|
|
#else
|
|
return k->uChar.AsciiChar;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int getWindowSize(struct current *current)
|
|
{
|
|
CONSOLE_SCREEN_BUFFER_INFO info;
|
|
if (!GetConsoleScreenBufferInfo(current->outh, &info)) {
|
|
return -1;
|
|
}
|
|
current->cols = info.dwSize.X;
|
|
current->rows = info.dwSize.Y;
|
|
if (current->cols <= 0 || current->rows <= 0) {
|
|
current->cols = 80;
|
|
return -1;
|
|
}
|
|
current->y = info.dwCursorPosition.Y;
|
|
current->x = info.dwCursorPosition.X;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int utf8_getchars(char *buf, int c)
|
|
{
|
|
#ifdef USE_UTF8
|
|
return utf8_fromunicode(buf, c);
|
|
#else
|
|
*buf = c;
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Returns the unicode character at the given offset,
|
|
* or -1 if none.
|
|
*/
|
|
static int get_char(struct current *current, int pos)
|
|
{
|
|
if (pos >= 0 && pos < current->chars) {
|
|
int c;
|
|
int i = utf8_index(current->buf, pos);
|
|
(void)utf8_tounicode(current->buf + i, &c);
|
|
return c;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void refreshLine(const char *prompt, struct current *current)
|
|
{
|
|
int plen;
|
|
int pchars;
|
|
int backup = 0;
|
|
int i;
|
|
const char *buf = current->buf;
|
|
int chars = current->chars;
|
|
int pos = current->pos;
|
|
int b;
|
|
int ch;
|
|
int n;
|
|
|
|
/* Should intercept SIGWINCH. For now, just get the size every time */
|
|
getWindowSize(current);
|
|
|
|
plen = strlen(prompt);
|
|
pchars = utf8_strlen(prompt, plen);
|
|
|
|
/* Account for a line which is too long to fit in the window.
|
|
* Note that control chars require an extra column
|
|
*/
|
|
|
|
/* How many cols are required to the left of 'pos'?
|
|
* The prompt, plus one extra for each control char
|
|
*/
|
|
n = pchars + utf8_strlen(buf, current->len);
|
|
b = 0;
|
|
for (i = 0; i < pos; i++) {
|
|
b += utf8_tounicode(buf + b, &ch);
|
|
if (ch < ' ') {
|
|
n++;
|
|
}
|
|
}
|
|
|
|
/* If too many are need, strip chars off the front of 'buf'
|
|
* until it fits. Note that if the current char is a control character,
|
|
* we need one extra col.
|
|
*/
|
|
if (current->pos < current->chars && get_char(current, current->pos) < ' ') {
|
|
n++;
|
|
}
|
|
|
|
while (n >= current->cols) {
|
|
b = utf8_tounicode(buf, &ch);
|
|
if (ch < ' ') {
|
|
n--;
|
|
}
|
|
n--;
|
|
buf += b;
|
|
pos--;
|
|
chars--;
|
|
}
|
|
|
|
/* Cursor to left edge, then the prompt */
|
|
cursorToLeft(current);
|
|
outputChars(current, prompt, plen);
|
|
|
|
/* Now the current buffer content */
|
|
|
|
/* Need special handling for control characters.
|
|
* If we hit 'cols', stop.
|
|
*/
|
|
b = 0; /* unwritted bytes */
|
|
n = 0; /* How many control chars were written */
|
|
for (i = 0; i < chars; i++) {
|
|
int ch;
|
|
int w = utf8_tounicode(buf + b, &ch);
|
|
if (ch < ' ') {
|
|
n++;
|
|
}
|
|
if (pchars + i + n >= current->cols) {
|
|
break;
|
|
}
|
|
if (ch < ' ') {
|
|
/* A control character, so write the buffer so far */
|
|
outputChars(current, buf, b);
|
|
buf += b + w;
|
|
b = 0;
|
|
outputControlChar(current, ch + '@');
|
|
if (i < pos) {
|
|
backup++;
|
|
}
|
|
}
|
|
else {
|
|
b += w;
|
|
}
|
|
}
|
|
outputChars(current, buf, b);
|
|
|
|
/* Erase to right, move cursor to original position */
|
|
eraseEol(current);
|
|
setCursorPos(current, pos + pchars + backup);
|
|
}
|
|
|
|
static void set_current(struct current *current, const char *str)
|
|
{
|
|
strncpy(current->buf, str, current->bufmax);
|
|
current->buf[current->bufmax - 1] = 0;
|
|
current->len = strlen(current->buf);
|
|
current->pos = current->chars = utf8_strlen(current->buf, current->len);
|
|
}
|
|
|
|
static int has_room(struct current *current, int bytes)
|
|
{
|
|
return current->len + bytes < current->bufmax - 1;
|
|
}
|
|
|
|
/**
|
|
* Removes the char at 'pos'.
|
|
*
|
|
* Returns 1 if the line needs to be refreshed, 2 if not
|
|
* and 0 if nothing was removed
|
|
*/
|
|
static int remove_char(struct current *current, int pos)
|
|
{
|
|
if (pos >= 0 && pos < current->chars) {
|
|
int p1, p2;
|
|
int ret = 1;
|
|
p1 = utf8_index(current->buf, pos);
|
|
p2 = p1 + utf8_index(current->buf + p1, 1);
|
|
|
|
#ifdef USE_TERMIOS
|
|
/* optimise remove char in the case of removing the last char */
|
|
if (current->pos == pos + 1 && current->pos == current->chars) {
|
|
if (current->buf[pos] >= ' ' && utf8_strlen(current->prompt, -1) + utf8_strlen(current->buf, current->len) < current->cols - 1) {
|
|
ret = 2;
|
|
fd_printf(current->fd, "\b \b");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Move the null char too */
|
|
memmove(current->buf + p1, current->buf + p2, current->len - p2 + 1);
|
|
current->len -= (p2 - p1);
|
|
current->chars--;
|
|
|
|
if (current->pos > pos) {
|
|
current->pos--;
|
|
}
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Insert 'ch' at position 'pos'
|
|
*
|
|
* Returns 1 if the line needs to be refreshed, 2 if not
|
|
* and 0 if nothing was inserted (no room)
|
|
*/
|
|
static int insert_char(struct current *current, int pos, int ch)
|
|
{
|
|
char buf[3];
|
|
int n = utf8_getchars(buf, ch);
|
|
|
|
if (has_room(current, n) && pos >= 0 && pos <= current->chars) {
|
|
int p1, p2;
|
|
int ret = 1;
|
|
p1 = utf8_index(current->buf, pos);
|
|
p2 = p1 + n;
|
|
|
|
#ifdef USE_TERMIOS
|
|
/* optimise the case where adding a single char to the end and no scrolling is needed */
|
|
if (current->pos == pos && current->chars == pos) {
|
|
if (ch >= ' ' && utf8_strlen(current->prompt, -1) + utf8_strlen(current->buf, current->len) < current->cols - 1) {
|
|
IGNORE_RC(write(current->fd, buf, n));
|
|
ret = 2;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
memmove(current->buf + p2, current->buf + p1, current->len - p1);
|
|
memcpy(current->buf + p1, buf, n);
|
|
current->len += n;
|
|
|
|
current->chars++;
|
|
if (current->pos >= pos) {
|
|
current->pos++;
|
|
}
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Returns 0 if no chars were removed or non-zero otherwise.
|
|
*/
|
|
static int remove_chars(struct current *current, int pos, int n)
|
|
{
|
|
int removed = 0;
|
|
while (n-- && remove_char(current, pos)) {
|
|
removed++;
|
|
}
|
|
return removed;
|
|
}
|
|
|
|
#ifndef NO_COMPLETION
|
|
static linenoiseCompletionCallback *completionCallback = NULL;
|
|
|
|
static void beep() {
|
|
#ifdef USE_TERMIOS
|
|
fprintf(stderr, "\x7");
|
|
fflush(stderr);
|
|
#endif
|
|
}
|
|
|
|
static void freeCompletions(linenoiseCompletions *lc) {
|
|
size_t i;
|
|
for (i = 0; i < lc->len; i++)
|
|
free(lc->cvec[i]);
|
|
free(lc->cvec);
|
|
}
|
|
|
|
static int completeLine(struct current *current, int c) {
|
|
linenoiseCompletions lc = { 0, NULL };
|
|
|
|
completionCallback(current->buf,&lc);
|
|
if (lc.len == 0) {
|
|
beep();
|
|
current->compl = 0;
|
|
c = 0;
|
|
} else {
|
|
size_t stop = 0, i;
|
|
|
|
if (current->compl == 0) {
|
|
current->compl_off = 0;
|
|
current->compl = 1;
|
|
c = fd_read(current);
|
|
}
|
|
i = current->compl_off;
|
|
|
|
while(!stop) {
|
|
if (c == -1)
|
|
break;
|
|
|
|
/* Show completion or original buffer */
|
|
if (i < lc.len) {
|
|
struct current tmp = *current;
|
|
tmp.buf = lc.cvec[i];
|
|
tmp.pos = tmp.len = strlen(tmp.buf);
|
|
tmp.chars = utf8_strlen(tmp.buf, tmp.len);
|
|
refreshLine(current->prompt, &tmp);
|
|
} else {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
|
|
switch(c) {
|
|
case '\t': /* tab */
|
|
i = (i+1) % (lc.len+1);
|
|
if (i == lc.len) beep();
|
|
current->compl_off = i;
|
|
break;
|
|
case 27: /* escape */
|
|
/* Re-show original buffer */
|
|
if (i < lc.len) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
stop = 1;
|
|
break;
|
|
case -1:
|
|
break;
|
|
default:
|
|
/* Update buffer and return */
|
|
if (i < lc.len) {
|
|
set_current(current,lc.cvec[i]);
|
|
}
|
|
stop = 1;
|
|
break;
|
|
}
|
|
if (!stop)
|
|
c = fd_read(current);
|
|
}
|
|
if (stop)
|
|
current->compl = 0;
|
|
}
|
|
|
|
freeCompletions(&lc);
|
|
return c; /* Return last read character */
|
|
}
|
|
|
|
/* Register a callback function to be called for tab-completion. */
|
|
void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) {
|
|
completionCallback = fn;
|
|
}
|
|
|
|
void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
|
|
lc->cvec = (char **)realloc(lc->cvec,sizeof(char*)*(lc->len+1));
|
|
lc->cvec[lc->len++] = strdup(str);
|
|
}
|
|
|
|
#endif
|
|
|
|
static int linenoisePrompt(struct current *current) {
|
|
/* The latest history entry is always our current buffer, that
|
|
* initially is just an empty string. */
|
|
if (current->new) {
|
|
linenoiseHistoryAdd("");
|
|
|
|
set_current(current, "");
|
|
refreshLine(current->prompt, current);
|
|
current->new = 0;
|
|
}
|
|
|
|
if (current->rev) {
|
|
current->rev = 3; /* Do not display the prompt again. */
|
|
goto rev_i_search;
|
|
}
|
|
|
|
while(1) {
|
|
int dir = -1;
|
|
int c = fd_read(current);
|
|
|
|
#ifndef NO_COMPLETION
|
|
/* 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 ((completionCallback != NULL) &&
|
|
((current->compl) || (c == 9))) {
|
|
c = completeLine(current, c);
|
|
/* Return on errors */
|
|
if (c < 0) return current->len;
|
|
/* Read next character when 0 */
|
|
if (c == 0) continue;
|
|
}
|
|
#endif
|
|
|
|
process_char:
|
|
if (c == -1) return current->len;
|
|
#ifdef USE_TERMIOS
|
|
if (c == 27) { /* escape sequence */
|
|
c = check_special(current->fd);
|
|
}
|
|
#endif
|
|
switch(c) {
|
|
case '\r': /* enter */
|
|
history_len--;
|
|
free(history[history_len]);
|
|
current->new = 1;
|
|
current->history_index = 0;
|
|
return current->len;
|
|
case ctrl('C'): /* ctrl-c */
|
|
errno = EAGAIN;
|
|
current->new = 1;
|
|
return -1;
|
|
case 127: /* backspace */
|
|
case ctrl('H'):
|
|
if (remove_char(current, current->pos - 1) == 1) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('D'): /* ctrl-d */
|
|
if (current->len == 0) {
|
|
/* Empty line, so EOF */
|
|
history_len--;
|
|
free(history[history_len]);
|
|
current->new = 1;
|
|
return -1;
|
|
}
|
|
/* Otherwise fall through to delete char to right of cursor */
|
|
case SPECIAL_DELETE:
|
|
if (remove_char(current, current->pos) == 1) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('W'): /* ctrl-w */
|
|
/* eat any spaces on the left */
|
|
{
|
|
int pos = current->pos;
|
|
while (pos > 0 && get_char(current, pos - 1) == ' ') {
|
|
pos--;
|
|
}
|
|
|
|
/* now eat any non-spaces on the left */
|
|
while (pos > 0 && get_char(current, pos - 1) != ' ') {
|
|
pos--;
|
|
}
|
|
|
|
if (remove_chars(current, pos, current->pos - pos)) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
}
|
|
break;
|
|
case ctrl('R'): /* ctrl-r */
|
|
{
|
|
/* Display the reverse-i-search prompt and process chars */
|
|
char *rbuf;
|
|
char rprompt[80];
|
|
int rchars;
|
|
int rlen;
|
|
int searchpos;
|
|
|
|
memset(current->rev_rbuf, 0, sizeof(current->rev_rbuf));
|
|
current->rev_rchars = 0;
|
|
current->rev_rlen = 0;
|
|
current->rev_searchpos = (history_len - 1);
|
|
current->rev = 1;
|
|
rev_i_search:
|
|
rbuf = current->rev_rbuf;
|
|
rchars = current->rev_rchars;
|
|
rlen = current->rev_rlen;
|
|
searchpos = current->rev_searchpos;
|
|
while (1) {
|
|
int n = 0;
|
|
const char *p = NULL;
|
|
int skipsame = 0;
|
|
int searchdir = -1;
|
|
|
|
c = fd_read(current);
|
|
if ((c == -1) && (current->rev == 3))
|
|
goto process_char;
|
|
snprintf(rprompt, sizeof(rprompt), "(reverse-i-search)'%s': ", rbuf);
|
|
refreshLine(rprompt, current);
|
|
current->rev = 2;
|
|
if (c == -1)
|
|
goto process_char;
|
|
if (c == ctrl('H') || c == 127) {
|
|
if (rchars) {
|
|
int p = utf8_index(rbuf, --rchars);
|
|
rbuf[p] = 0;
|
|
rlen = strlen(rbuf);
|
|
}
|
|
continue;
|
|
}
|
|
#ifdef USE_TERMIOS
|
|
if (c == 27) {
|
|
c = check_special(current->fd);
|
|
}
|
|
#endif
|
|
if (c == ctrl('P') || c == SPECIAL_UP) {
|
|
/* Search for the previous (earlier) match */
|
|
if (searchpos > 0) {
|
|
searchpos--;
|
|
}
|
|
skipsame = 1;
|
|
}
|
|
else if (c == ctrl('N') || c == SPECIAL_DOWN) {
|
|
/* Search for the next (later) match */
|
|
if (searchpos < history_len) {
|
|
searchpos++;
|
|
}
|
|
searchdir = 1;
|
|
skipsame = 1;
|
|
}
|
|
else if (c >= ' ') {
|
|
if (rlen >= (int)sizeof(current->rev_rbuf) + 3) {
|
|
continue;
|
|
}
|
|
|
|
n = utf8_getchars(rbuf + rlen, c);
|
|
rlen += n;
|
|
rchars++;
|
|
rbuf[rlen] = 0;
|
|
|
|
/* Adding a new char resets the search location */
|
|
searchpos = history_len - 1;
|
|
}
|
|
else {
|
|
/* Exit from incremental search mode */
|
|
current->rev = 0;
|
|
break;
|
|
}
|
|
|
|
/* Now search through the history for a match */
|
|
for (; searchpos >= 0 && searchpos < history_len; searchpos += searchdir) {
|
|
p = strstr(history[searchpos], rbuf);
|
|
if (p) {
|
|
/* Found a match */
|
|
if (skipsame && strcmp(history[searchpos], current->buf) == 0) {
|
|
/* But it is identical, so skip it */
|
|
continue;
|
|
}
|
|
/* Copy the matching line and set the cursor position */
|
|
set_current(current,history[searchpos]);
|
|
current->pos = utf8_strlen(history[searchpos], p - history[searchpos]);
|
|
break;
|
|
}
|
|
}
|
|
if (!p && n) {
|
|
/* No match, so don't add it */
|
|
rchars--;
|
|
rlen -= n;
|
|
rbuf[rlen] = 0;
|
|
}
|
|
}
|
|
if (c == ctrl('G') || c == ctrl('C')) {
|
|
/* ctrl-g terminates the search with no effect */
|
|
set_current(current, "");
|
|
c = 0;
|
|
}
|
|
else if (c == ctrl('J')) {
|
|
/* ctrl-j terminates the search leaving the buffer in place */
|
|
c = 0;
|
|
}
|
|
/* Go process the char normally */
|
|
if (current->rev) {
|
|
refreshLine(rprompt, current);
|
|
current->rev_rchars = rchars;
|
|
current->rev_rlen = rlen;
|
|
current->rev_searchpos = searchpos;
|
|
}
|
|
else
|
|
refreshLine(current->prompt, current);
|
|
goto process_char;
|
|
}
|
|
break;
|
|
case ctrl('T'): /* ctrl-t */
|
|
if (current->pos > 0 && current->pos < current->chars) {
|
|
c = get_char(current, current->pos);
|
|
remove_char(current, current->pos);
|
|
insert_char(current, current->pos - 1, c);
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('V'): /* ctrl-v */
|
|
if (has_room(current, 3)) {
|
|
/* Insert the ^V first */
|
|
if (insert_char(current, current->pos, c)) {
|
|
refreshLine(current->prompt, current);
|
|
/* Now wait for the next char. Can insert anything except \0 */
|
|
c = fd_read(current);
|
|
|
|
/* Remove the ^V first */
|
|
remove_char(current, current->pos - 1);
|
|
if (c != -1) {
|
|
/* Insert the actual char */
|
|
insert_char(current, current->pos, c);
|
|
}
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
}
|
|
break;
|
|
case ctrl('B'):
|
|
case SPECIAL_LEFT:
|
|
if (current->pos > 0) {
|
|
current->pos--;
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('F'):
|
|
case SPECIAL_RIGHT:
|
|
if (current->pos < current->chars) {
|
|
current->pos++;
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('P'):
|
|
case SPECIAL_UP:
|
|
dir = 1;
|
|
case ctrl('N'):
|
|
case SPECIAL_DOWN:
|
|
if (history_len > 1) {
|
|
/* Update the current history entry before to
|
|
* overwrite it with tne next one. */
|
|
free(history[history_len-1-current->history_index]);
|
|
history[history_len-1-current->history_index] = strdup(current->buf);
|
|
/* Show the new entry */
|
|
current->history_index += dir;
|
|
if (current->history_index < 0) {
|
|
current->history_index = 0;
|
|
break;
|
|
} else if (current->history_index >= history_len) {
|
|
current->history_index = history_len-1;
|
|
break;
|
|
}
|
|
set_current(current, history[history_len-1-current->history_index]);
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('A'): /* Ctrl+a, go to the start of the line */
|
|
case SPECIAL_HOME:
|
|
current->pos = 0;
|
|
refreshLine(current->prompt, current);
|
|
break;
|
|
case ctrl('E'): /* ctrl+e, go to the end of the line */
|
|
case SPECIAL_END:
|
|
current->pos = current->chars;
|
|
refreshLine(current->prompt, current);
|
|
break;
|
|
case ctrl('U'): /* Ctrl+u, delete to beginning of line. */
|
|
if (remove_chars(current, 0, current->pos)) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('K'): /* Ctrl+k, delete from current to end of line. */
|
|
if (remove_chars(current, current->pos, current->chars - current->pos)) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
break;
|
|
case ctrl('L'): /* Ctrl+L, clear screen */
|
|
clearScreen(current);
|
|
/* Force recalc of window size for serial terminals */
|
|
current->cols = 0;
|
|
refreshLine(current->prompt, current);
|
|
break;
|
|
default:
|
|
/* Only tab is allowed without ^V */
|
|
if (c == '\t' || c >= ' ') {
|
|
if (insert_char(current, current->pos, c) == 1) {
|
|
refreshLine(current->prompt, current);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return current->len;
|
|
}
|
|
|
|
static void current_nonblock(struct current *current, int nonblock)
|
|
{
|
|
#ifndef _WIN32
|
|
static int ifl = -1;
|
|
|
|
if (!current->nb)
|
|
return;
|
|
if (nonblock) {
|
|
ifl = fcntl(current->fd, F_GETFL);
|
|
if (ifl >= 0)
|
|
fcntl(current->fd, F_SETFL, (ifl | O_NONBLOCK));
|
|
}
|
|
else if (ifl >= 0)
|
|
fcntl(current->fd, F_SETFL, ifl);
|
|
#else
|
|
(void)current;
|
|
(void)nonblock;
|
|
#endif
|
|
}
|
|
|
|
static struct ctx nb_ctx;
|
|
|
|
char *linenoise_nb(const char *prompt)
|
|
{
|
|
int count;
|
|
struct ctx *ctx = &nb_ctx;
|
|
struct current *current;
|
|
char *buf;
|
|
|
|
if (ctx->init == 0) {
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
ctx->init = 1;
|
|
ctx->current.nb = 1; /* Enable non-blocking mode */
|
|
ctx->current.new = 1; /* This is a new context */
|
|
}
|
|
current = &ctx->current;
|
|
buf = ctx->buf;
|
|
if (current->new)
|
|
enableRawMode(current);
|
|
if (!rawmode) {
|
|
if (current->new) {
|
|
printf("%s", prompt);
|
|
fflush(stdout);
|
|
current->new = 0;
|
|
}
|
|
current_nonblock(current, 1);
|
|
if (fgets(buf, sizeof(ctx->buf), stdin) == NULL) {
|
|
current_nonblock(current, 0);
|
|
return NULL;
|
|
}
|
|
current_nonblock(current, 0);
|
|
count = strlen(ctx->buf);
|
|
if (count && buf[count-1] == '\n') {
|
|
count--;
|
|
buf[count] = '\0';
|
|
current->new = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (current->new) {
|
|
current->buf = buf;
|
|
current->bufmax = sizeof(ctx->buf);
|
|
current->len = 0;
|
|
current->chars = 0;
|
|
current->pos = 0;
|
|
}
|
|
current->prompt = prompt;
|
|
|
|
current_nonblock(current, 1);
|
|
count = linenoisePrompt(current);
|
|
current_nonblock(current, 0);
|
|
if (current->new) {
|
|
disableRawMode(current);
|
|
printf("\n");
|
|
}
|
|
if (count == -1) {
|
|
return NULL;
|
|
}
|
|
}
|
|
if (current->new)
|
|
return strdup(buf);
|
|
return NULL;
|
|
}
|
|
|
|
void linenoise_nb_clean(void)
|
|
{
|
|
if (rawmode)
|
|
disableRawMode(&nb_ctx.current);
|
|
if (!nb_ctx.current.new)
|
|
puts("");
|
|
nb_ctx.init = 0;
|
|
}
|
|
|
|
int linenoise_nb_eol(void)
|
|
{
|
|
return nb_ctx.current.new;
|
|
}
|
|
|
|
char *linenoise(const char *prompt)
|
|
{
|
|
memset(&nb_ctx, 0, sizeof(nb_ctx));
|
|
nb_ctx.init = 1;
|
|
nb_ctx.current.new = 1;
|
|
return linenoise_nb(prompt);
|
|
}
|
|
|
|
/* Using a circular buffer is smarter, but a bit more complex to handle. */
|
|
int linenoiseHistoryAdd(const char *line) {
|
|
char *linecopy;
|
|
|
|
if (history_max_len == 0) return 0;
|
|
if (history == NULL) {
|
|
history = (char **)malloc(sizeof(char*)*history_max_len);
|
|
if (history == NULL) return 0;
|
|
memset(history,0,(sizeof(char*)*history_max_len));
|
|
}
|
|
|
|
/* do not insert duplicate lines into history */
|
|
if (history_len > 0 && strcmp(line, history[history_len - 1]) == 0) {
|
|
return 0;
|
|
}
|
|
|
|
linecopy = strdup(line);
|
|
if (!linecopy) return 0;
|
|
if (history_len == history_max_len) {
|
|
free(history[0]);
|
|
memmove(history,history+1,sizeof(char*)*(history_max_len-1));
|
|
history_len--;
|
|
}
|
|
history[history_len] = linecopy;
|
|
history_len++;
|
|
return 1;
|
|
}
|
|
|
|
int linenoiseHistorySetMaxLen(int len) {
|
|
char **newHistory;
|
|
|
|
if (len < 1) return 0;
|
|
if (history) {
|
|
int tocopy = history_len;
|
|
|
|
newHistory = (char **)malloc(sizeof(char*)*len);
|
|
if (newHistory == NULL) return 0;
|
|
if (len < tocopy) tocopy = len;
|
|
memcpy(newHistory,history+(history_max_len-tocopy), sizeof(char*)*tocopy);
|
|
free(history);
|
|
history = newHistory;
|
|
}
|
|
history_max_len = len;
|
|
if (history_len > history_max_len)
|
|
history_len = history_max_len;
|
|
return 1;
|
|
}
|
|
|
|
/* Save the history in the specified file. On success 0 is returned
|
|
* otherwise -1 is returned. */
|
|
int linenoiseHistorySave(const char *filename) {
|
|
FILE *fp = fopen(filename,"w");
|
|
int j;
|
|
|
|
if (fp == NULL) return -1;
|
|
for (j = 0; j < history_len; j++) {
|
|
const char *str = history[j];
|
|
/* Need to encode backslash, nl and cr */
|
|
while (*str) {
|
|
if (*str == '\\') {
|
|
fputs("\\\\", fp);
|
|
}
|
|
else if (*str == '\n') {
|
|
fputs("\\n", fp);
|
|
}
|
|
else if (*str == '\r') {
|
|
fputs("\\r", fp);
|
|
}
|
|
else {
|
|
fputc(*str, fp);
|
|
}
|
|
str++;
|
|
}
|
|
fputc('\n', fp);
|
|
}
|
|
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
/* 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 0 is returned, otherwise
|
|
* on error -1 is returned. */
|
|
int linenoiseHistoryLoad(const char *filename) {
|
|
FILE *fp = fopen(filename,"r");
|
|
char buf[LINENOISE_MAX_LINE];
|
|
|
|
if (fp == NULL) return -1;
|
|
|
|
while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) {
|
|
char *src, *dest;
|
|
|
|
/* Decode backslash escaped values */
|
|
for (src = dest = buf; *src; src++) {
|
|
char ch = *src;
|
|
|
|
if (ch == '\\') {
|
|
src++;
|
|
if (*src == 'n') {
|
|
ch = '\n';
|
|
}
|
|
else if (*src == 'r') {
|
|
ch = '\r';
|
|
} else {
|
|
ch = *src;
|
|
}
|
|
}
|
|
*dest++ = ch;
|
|
}
|
|
/* Remove trailing newline */
|
|
if (dest != buf && (dest[-1] == '\n' || dest[-1] == '\r')) {
|
|
dest--;
|
|
}
|
|
*dest = 0;
|
|
|
|
linenoiseHistoryAdd(buf);
|
|
}
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
/* Provide access to the history buffer.
|
|
*
|
|
* If 'len' is not NULL, the length is stored in *len.
|
|
*/
|
|
char **linenoiseHistory(int *len) {
|
|
if (len) {
|
|
*len = history_len;
|
|
}
|
|
return history;
|
|
}
|