| + |
/* linenoise.c -- VERSION 1.0
|
| + |
*
|
| + |
* 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/antirez/linenoise
|
| + |
*
|
| + |
* Does a number of crazy assumptions that happen to be true in 99.9999% of
|
| + |
* the 2010 UNIX computers around.
|
| + |
*
|
| + |
* ------------------------------------------------------------------------
|
| + |
*
|
| + |
* Copyright (c) 2010-2014, Salvatore Sanfilippo <antirez at gmail dot com>
|
| + |
* Copyright (c) 2010-2013, 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.
|
| + |
*
|
| + |
* ------------------------------------------------------------------------
|
| + |
*
|
| + |
* References:
|
| + |
* - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
|
| + |
* - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
|
| + |
*
|
| + |
* Todo list:
|
| + |
* - Filter bogus Ctrl+<char> combinations.
|
| + |
* - Win32 support
|
| + |
*
|
| + |
* Bloat:
|
| + |
* - History search like Ctrl+r in readline?
|
| + |
*
|
| + |
* List of escape sequences used by this program, we do everything just
|
| + |
* with three sequences. In order to be so cheap we may have some
|
| + |
* flickering effect with some slow terminal, but the lesser sequences
|
| + |
* the more compatible.
|
| + |
*
|
| + |
* 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 n chars
|
| + |
*
|
| + |
* CUB (CUrsor Backward)
|
| + |
* Sequence: ESC [ n D
|
| + |
* Effect: moves cursor backward n chars
|
| + |
*
|
| + |
* The following is used to get the terminal width if getting
|
| + |
* the width with the TIOCGWINSZ ioctl fails
|
| + |
*
|
| + |
* DSR (Device Status Report)
|
| + |
* Sequence: ESC [ 6 n
|
| + |
* Effect: reports the current cusor position as ESC [ n ; m R
|
| + |
* where n is the row and m is the column
|
| + |
*
|
| + |
* When multi line mode is enabled, we also use an additional escape
|
| + |
* sequence. However multi line editing is disabled by default.
|
| + |
*
|
| + |
* CUU (Cursor Up)
|
| + |
* Sequence: ESC [ n A
|
| + |
* Effect: moves cursor up of n chars.
|
| + |
*
|
| + |
* CUD (Cursor Down)
|
| + |
* Sequence: ESC [ n B
|
| + |
* Effect: moves cursor down of n chars.
|
| + |
*
|
| + |
* When linenoiseClearScreen() is called, two additional escape sequences
|
| + |
* are used in order to clear the screen and position the cursor at home
|
| + |
* position.
|
| + |
*
|
| + |
* CUP (Cursor position)
|
| + |
* Sequence: ESC [ H
|
| + |
* Effect: moves the cursor to upper left corner
|
| + |
*
|
| + |
* ED (Erase display)
|
| + |
* Sequence: ESC [ 2 J
|
| + |
* Effect: clear the whole screen
|
| + |
*
|
| + |
*/
|
| + |
|
| + |
#include <termios.h>
|
| + |
#include <unistd.h>
|
| + |
#include <stdlib.h>
|
| + |
#include <stdio.h>
|
| + |
#include <errno.h>
|
| + |
#include <string.h>
|
| + |
#include <stdlib.h>
|
| + |
#include <ctype.h>
|
| + |
#include <sys/types.h>
|
| + |
#include <sys/ioctl.h>
|
| + |
#include <unistd.h>
|
| + |
#include "linenoise.h"
|
| + |
|
| + |
#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
|
| + |
#define LINENOISE_MAX_LINE 4096
|
| + |
static char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
|
| + |
static linenoiseCompletionCallback *completionCallback = NULL;
|
| + |
|
| + |
static struct termios orig_termios; /* In order to restore at exit.*/
|
| + |
static int rawmode = 0; /* For atexit() function to check if restore is needed*/
|
| + |
static int mlmode = 0; /* Multi line mode. Default is single line. */
|
| + |
static int atexit_registered = 0; /* Register atexit just 1 time. */
|
| + |
static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
|
| + |
static int history_len = 0;
|
| + |
static char **history = NULL;
|
| + |
|
| + |
/* 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. */
|
| + |
const char *prompt; /* Prompt to display. */
|
| + |
size_t plen; /* Prompt length. */
|
| + |
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 */
|
| + |
};
|
| + |
|
| + |
static void linenoiseAtExit(void);
|
| + |
int linenoiseHistoryAdd(const char *line);
|
| + |
static void refreshLine(struct linenoiseState *l);
|
| + |
|
| + |
/* Debugging macro. */
|
| + |
#if 0
|
| + |
FILE *lndebug_fp = NULL;
|
| + |
#define lndebug(...) \
|
| + |
do { \
|
| + |
if (lndebug_fp == NULL) { \
|
| + |
lndebug_fp = fopen("/tmp/lndebug.txt","a"); \
|
| + |
fprintf(lndebug_fp, \
|
| + |
"[%d %d %d] p: %d, rows: %d, rpos: %d, max: %d, oldmax: %d\n", \
|
| + |
(int)l->len,(int)l->pos,(int)l->oldpos,plen,rows,rpos, \
|
| + |
(int)l->maxrows,old_rows); \
|
| + |
} \
|
| + |
fprintf(lndebug_fp, ", " __VA_ARGS__); \
|
| + |
fflush(lndebug_fp); \
|
| + |
} while (0)
|
| + |
#else
|
| + |
#define lndebug(fmt, ...)
|
| + |
#endif
|
| + |
|
| + |
/* ======================= Low level terminal handling ====================== */
|
| + |
|
| + |
/* Set if to use or not the multi line mode. */
|
| + |
void linenoiseSetMultiLine(int 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. */
|
| + |
static int isUnsupportedTerm(void) {
|
| + |
char *term = getenv("TERM");
|
| + |
int j;
|
| + |
|
| + |
if (term == NULL) return 0;
|
| + |
for (j = 0; unsupported_term[j]; j++)
|
| + |
if (!strcasecmp(term,unsupported_term[j])) return 1;
|
| + |
return 0;
|
| + |
}
|
| + |
|
| + |
/* Raw mode: 1960 magic shit. */
|
| + |
static int enableRawMode(int fd) {
|
| + |
struct termios raw;
|
| + |
|
| + |
if (!isatty(STDIN_FILENO)) goto fatal;
|
| + |
if (!atexit_registered) {
|
| + |
atexit(linenoiseAtExit);
|
| + |
atexit_registered = 1;
|
| + |
}
|
| + |
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 = 1;
|
| + |
return 0;
|
| + |
|
| + |
fatal:
|
| + |
errno = ENOTTY;
|
| + |
return -1;
|
| + |
}
|
| + |
|
| + |
static void disableRawMode(int fd) {
|
| + |
/* Don't even check the return value as it's too late. */
|
| + |
if (rawmode && tcsetattr(fd,TCSAFLUSH,&orig_termios) != -1)
|
| + |
rawmode = 0;
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
static 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. */
|
| + |
static int getColumns(int ifd, int ofd) {
|
| + |
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;
|
| + |
}
|
| + |
|
| + |
/* Clear the screen. Used to handle ctrl+l */
|
| + |
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. */
|
| + |
static void linenoiseBeep(void) {
|
| + |
fprintf(stderr, "\x7");
|
| + |
fflush(stderr);
|
| + |
}
|
| + |
|
| + |
/* ============================== Completion ================================ */
|
| + |
|
| + |
/* Free a list of completion option populated by linenoiseAddCompletion(). */
|
| + |
static void freeCompletions(linenoiseCompletions *lc) {
|
| + |
size_t i;
|
| + |
for (i = 0; i < lc->len; i++)
|
| + |
free(lc->cvec[i]);
|
| + |
if (lc->cvec != NULL)
|
| + |
free(lc->cvec);
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
static int completeLine(struct linenoiseState *ls) {
|
| + |
linenoiseCompletions lc = { 0, NULL };
|
| + |
int nread, nwritten;
|
| + |
char c = 0;
|
| + |
|
| + |
completionCallback(ls->buf,&lc);
|
| + |
if (lc.len == 0) {
|
| + |
linenoiseBeep();
|
| + |
} else {
|
| + |
size_t stop = 0, i = 0;
|
| + |
|
| + |
while(!stop) {
|
| + |
/* Show completion or original buffer */
|
| + |
if (i < lc.len) {
|
| + |
struct linenoiseState saved = *ls;
|
| + |
|
| + |
ls->len = ls->pos = strlen(lc.cvec[i]);
|
| + |
ls->buf = lc.cvec[i];
|
| + |
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) {
|
| + |
freeCompletions(&lc);
|
| + |
return -1;
|
| + |
}
|
| + |
|
| + |
switch(c) {
|
| + |
case 9: /* tab */
|
| + |
i = (i+1) % (lc.len+1);
|
| + |
if (i == lc.len) linenoiseBeep();
|
| + |
break;
|
| + |
case 27: /* escape */
|
| + |
/* Re-show original buffer */
|
| + |
if (i < lc.len) refreshLine(ls);
|
| + |
stop = 1;
|
| + |
break;
|
| + |
default:
|
| + |
/* Update buffer and return */
|
| + |
if (i < lc.len) {
|
| + |
nwritten = snprintf(ls->buf,ls->buflen,"%s",lc.cvec[i]);
|
| + |
ls->len = ls->pos = nwritten;
|
| + |
}
|
| + |
stop = 1;
|
| + |
break;
|
| + |
}
|
| + |
}
|
| + |
}
|
| + |
|
| + |
freeCompletions(&lc);
|
| + |
return c; /* Return last read character */
|
| + |
}
|
| + |
|
| + |
/* Register a callback function to be called for tab-completion. */
|
| + |
void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) {
|
| + |
completionCallback = fn;
|
| + |
}
|
| + |
|
| + |
/* This function is used by the callback function registered by the user
|
| + |
* in order to add completion options given the input string when the
|
| + |
* user typed <tab>. See the example.c source code for a very easy to
|
| + |
* understand example. */
|
| + |
void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
|
| + |
size_t len = strlen(str);
|
| + |
char *copy, **cvec;
|
| + |
|
| + |
copy = malloc(len+1);
|
| + |
if (copy == NULL) return;
|
| + |
memcpy(copy,str,len+1);
|
| + |
cvec = realloc(lc->cvec,sizeof(char*)*(lc->len+1));
|
| + |
if (cvec == NULL) {
|
| + |
free(copy);
|
| + |
return;
|
| + |
}
|
| + |
lc->cvec = cvec;
|
| + |
lc->cvec[lc->len++] = copy;
|
| + |
}
|
| + |
|
| + |
/* =========================== Line editing ================================= */
|
| + |
|
| + |
/* We define a very simple "append buffer" structure, that is an heap
|
| + |
* allocated string where we can append to. This is useful in order to
|
| + |
* write all the escape sequences in a buffer and flush them to the standard
|
| + |
* output in a single call, to avoid flickering effects. */
|
| + |
struct abuf {
|
| + |
char *b;
|
| + |
int len;
|
| + |
};
|
| + |
|
| + |
static void abInit(struct abuf *ab) {
|
| + |
ab->b = NULL;
|
| + |
ab->len = 0;
|
| + |
}
|
| + |
|
| + |
static void abAppend(struct abuf *ab, const char *s, int len) {
|
| + |
char *new = realloc(ab->b,ab->len+len);
|
| + |
|
| + |
if (new == NULL) return;
|
| + |
memcpy(new+ab->len,s,len);
|
| + |
ab->b = new;
|
| + |
ab->len += len;
|
| + |
}
|
| + |
|
| + |
static void abFree(struct abuf *ab) {
|
| + |
free(ab->b);
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
static void refreshSingleLine(struct linenoiseState *l) {
|
| + |
char seq[64];
|
| + |
size_t plen = strlen(l->prompt);
|
| + |
int fd = l->ofd;
|
| + |
char *buf = l->buf;
|
| + |
size_t len = l->len;
|
| + |
size_t pos = l->pos;
|
| + |
struct abuf ab;
|
| + |
|
| + |
while((plen+pos) >= l->cols) {
|
| + |
buf++;
|
| + |
len--;
|
| + |
pos--;
|
| + |
}
|
| + |
while (plen+len > l->cols) {
|
| + |
len--;
|
| + |
}
|
| + |
|
| + |
abInit(&ab);
|
| + |
/* Cursor to left edge */
|
| + |
snprintf(seq,64,"\r");
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
/* Write the prompt and the current buffer content */
|
| + |
abAppend(&ab,l->prompt,strlen(l->prompt));
|
| + |
abAppend(&ab,buf,len);
|
| + |
/* Erase to right */
|
| + |
snprintf(seq,64,"\x1b[0K");
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
/* Move cursor to original position. */
|
| + |
snprintf(seq,64,"\r\x1b[%dC", (int)(pos+plen));
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */
|
| + |
abFree(&ab);
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
static void refreshMultiLine(struct linenoiseState *l) {
|
| + |
char seq[64];
|
| + |
int plen = strlen(l->prompt);
|
| + |
int rows = (plen+l->len+l->cols-1)/l->cols; /* rows used by current buf. */
|
| + |
int rpos = (plen+l->oldpos+l->cols)/l->cols; /* cursor relative row. */
|
| + |
int rpos2; /* rpos after refresh. */
|
| + |
int col; /* colum position, zero-based. */
|
| + |
int old_rows = l->maxrows;
|
| + |
int fd = l->ofd, j;
|
| + |
struct abuf 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. */
|
| + |
abInit(&ab);
|
| + |
if (old_rows-rpos > 0) {
|
| + |
lndebug("go down %d", old_rows-rpos);
|
| + |
snprintf(seq,64,"\x1b[%dB", old_rows-rpos);
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
}
|
| + |
|
| + |
/* Now for every row clear it, go up. */
|
| + |
for (j = 0; j < old_rows-1; j++) {
|
| + |
lndebug("clear+up");
|
| + |
snprintf(seq,64,"\r\x1b[0K\x1b[1A");
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
}
|
| + |
|
| + |
/* Clean the top line. */
|
| + |
lndebug("clear");
|
| + |
snprintf(seq,64,"\r\x1b[0K");
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
|
| + |
/* Write the prompt and the current buffer content */
|
| + |
abAppend(&ab,l->prompt,strlen(l->prompt));
|
| + |
abAppend(&ab,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)
|
| + |
{
|
| + |
lndebug("<newline>");
|
| + |
abAppend(&ab,"\n",1);
|
| + |
snprintf(seq,64,"\r");
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
rows++;
|
| + |
if (rows > (int)l->maxrows) l->maxrows = rows;
|
| + |
}
|
| + |
|
| + |
/* Move cursor to right position. */
|
| + |
rpos2 = (plen+l->pos+l->cols)/l->cols; /* current cursor relative row. */
|
| + |
lndebug("rpos2 %d", rpos2);
|
| + |
|
| + |
/* Go up till we reach the expected positon. */
|
| + |
if (rows-rpos2 > 0) {
|
| + |
lndebug("go-up %d", rows-rpos2);
|
| + |
snprintf(seq,64,"\x1b[%dA", rows-rpos2);
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
}
|
| + |
|
| + |
/* Set column. */
|
| + |
col = (plen+(int)l->pos) % (int)l->cols;
|
| + |
lndebug("set col %d", 1+col);
|
| + |
if (col)
|
| + |
snprintf(seq,64,"\r\x1b[%dC", col);
|
| + |
else
|
| + |
snprintf(seq,64,"\r");
|
| + |
abAppend(&ab,seq,strlen(seq));
|
| + |
|
| + |
lndebug("\n");
|
| + |
l->oldpos = l->pos;
|
| + |
|
| + |
if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */
|
| + |
abFree(&ab);
|
| + |
}
|
| + |
|
| + |
/* Calls the two low level functions refreshSingleLine() or
|
| + |
* refreshMultiLine() according to the selected mode. */
|
| + |
static 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->plen+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. */
|
| + |
void linenoiseEditMoveHome(struct linenoiseState *l) {
|
| + |
if (l->pos != 0) {
|
| + |
l->pos = 0;
|
| + |
refreshLine(l);
|
| + |
}
|
| + |
}
|
| + |
|
| + |
/* Move cursor to the end of the line. */
|
| + |
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
|
| + |
void linenoiseEditHistoryNext(struct linenoiseState *l, int dir) {
|
| + |
if (history_len > 1) {
|
| + |
/* Update the current history entry before to
|
| + |
* overwrite it with the next one. */
|
| + |
free(history[history_len - 1 - l->history_index]);
|
| + |
history[history_len - 1 - l->history_index] = strdup(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 >= history_len) {
|
| + |
l->history_index = history_len-1;
|
| + |
return;
|
| + |
}
|
| + |
strncpy(l->buf,history[history_len - 1 - l->history_index],l->buflen);
|
| + |
l->buf[l->buflen-1] = '\0';
|
| + |
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. */
|
| + |
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. */
|
| + |
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. */
|
| + |
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. */
|
| + |
static 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.plen = strlen(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. */
|
| + |
linenoiseHistoryAdd("");
|
| + |
|
| + |
if (write(l.ofd,prompt,l.plen) == -1) return -1;
|
| + |
while(1) {
|
| + |
char c;
|
| + |
int nread;
|
| + |
char seq[3];
|
| + |
|
| + |
nread = read(l.ifd,&c,1);
|
| + |
if (nread <= 0) return 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 l.len;
|
| + |
/* Read next character when 0 */
|
| + |
if (c == 0) continue;
|
| + |
}
|
| + |
|
| + |
switch(c) {
|
| + |
case ENTER: /* enter */
|
| + |
history_len--;
|
| + |
free(history[history_len]);
|
| + |
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_len--;
|
| + |
free(history[history_len]);
|
| + |
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 l.len;
|
| + |
}
|
| + |
|
| + |
/* This special mode is used by linenoise in order to print scan codes
|
| + |
* on screen for debugging / development purposes. It is implemented
|
| + |
* by the linenoise_example program using the --keycodes option. */
|
| + |
void linenoisePrintKeyCodes(void) {
|
| + |
char quit[4];
|
| + |
|
| + |
printf("Linenoise key codes debugging mode.\n"
|
| + |
"Press keys to see scan codes. Type 'quit' at any time to exit.\n");
|
| + |
if (enableRawMode(STDIN_FILENO) == -1) return;
|
| + |
memset(quit,' ',4);
|
| + |
while(1) {
|
| + |
char c;
|
| + |
int nread;
|
| + |
|
| + |
nread = read(STDIN_FILENO,&c,1);
|
| + |
if (nread <= 0) continue;
|
| + |
memmove(quit,quit+1,sizeof(quit)-1); /* shift string to left. */
|
| + |
quit[sizeof(quit)-1] = c; /* Insert current char on the right. */
|
| + |
if (memcmp(quit,"quit",sizeof(quit)) == 0) break;
|
| + |
|
| + |
printf("'%c' %02x (%d) (type quit to exit)\n",
|
| + |
isprint(c) ? c : '?', (int)c, (int)c);
|
| + |
printf("\r"); /* Go left edge manually, we are in raw mode. */
|
| + |
fflush(stdout);
|
| + |
}
|
| + |
disableRawMode(STDIN_FILENO);
|
| + |
}
|
| + |
|
| + |
/* This function calls the line editing function linenoiseEdit() using
|
| + |
* the STDIN file descriptor set in raw mode. */
|
| + |
static int linenoiseRaw(char *buf, size_t buflen, const char *prompt) {
|
| + |
int count;
|
| + |
|
| + |
if (buflen == 0) {
|
| + |
errno = EINVAL;
|
| + |
return -1;
|
| + |
}
|
| + |
if (!isatty(STDIN_FILENO)) {
|
| + |
/* Not a tty: read from file / pipe. */
|
| + |
if (fgets(buf, buflen, stdin) == NULL) return -1;
|
| + |
count = strlen(buf);
|
| + |
if (count && buf[count-1] == '\n') {
|
| + |
count--;
|
| + |
buf[count] = '\0';
|
| + |
}
|
| + |
} else {
|
| + |
/* Interactive editing. */
|
| + |
if (enableRawMode(STDIN_FILENO) == -1) return -1;
|
| + |
count = linenoiseEdit(STDIN_FILENO, STDOUT_FILENO, buf, buflen, prompt);
|
| + |
disableRawMode(STDIN_FILENO);
|
| + |
printf("\n");
|
| + |
}
|
| + |
return count;
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
char *linenoise(const char *prompt) {
|
| + |
char buf[LINENOISE_MAX_LINE];
|
| + |
int count;
|
| + |
|
| + |
if (isUnsupportedTerm()) {
|
| + |
size_t len;
|
| + |
|
| + |
printf("%s",prompt);
|
| + |
fflush(stdout);
|
| + |
if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) return NULL;
|
| + |
len = strlen(buf);
|
| + |
while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) {
|
| + |
len--;
|
| + |
buf[len] = '\0';
|
| + |
}
|
| + |
return strdup(buf);
|
| + |
} else {
|
| + |
count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt);
|
| + |
if (count == -1) return NULL;
|
| + |
return strdup(buf);
|
| + |
}
|
| + |
}
|
| + |
|
| + |
/* ================================ History ================================= */
|
| + |
|
| + |
/* Free the history, but does not reset it. Only used when we have to
|
| + |
* exit() to avoid memory leaks are reported by valgrind & co. */
|
| + |
static void freeHistory(void) {
|
| + |
if (history) {
|
| + |
int j;
|
| + |
|
| + |
for (j = 0; j < history_len; j++)
|
| + |
free(history[j]);
|
| + |
free(history);
|
| + |
}
|
| + |
}
|
| + |
|
| + |
/* At exit we'll try to fix the terminal to the initial conditions. */
|
| + |
static void linenoiseAtExit(void) {
|
| + |
disableRawMode(STDIN_FILENO);
|
| + |
freeHistory();
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
int linenoiseHistoryAdd(const char *line) {
|
| + |
char *linecopy;
|
| + |
|
| + |
if (history_max_len == 0) return 0;
|
| + |
|
| + |
/* Initialization on first call. */
|
| + |
if (history == NULL) {
|
| + |
history = malloc(sizeof(char*)*history_max_len);
|
| + |
if (history == NULL) return 0;
|
| + |
memset(history,0,(sizeof(char*)*history_max_len));
|
| + |
}
|
| + |
|
| + |
/* Don't add duplicated lines. */
|
| + |
if (history_len && !strcmp(history[history_len-1], line)) return 0;
|
| + |
|
| + |
/* Add an heap allocated copy of the line in the history.
|
| + |
* If we reached the max length, remove the older line. */
|
| + |
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;
|
| + |
}
|
| + |
|
| + |
/* 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. */
|
| + |
int linenoiseHistorySetMaxLen(int len) {
|
| + |
char **new;
|
| + |
|
| + |
if (len < 1) return 0;
|
| + |
if (history) {
|
| + |
int tocopy = history_len;
|
| + |
|
| + |
new = malloc(sizeof(char*)*len);
|
| + |
if (new == NULL) return 0;
|
| + |
|
| + |
/* If we can't copy everything, free the elements we'll not use. */
|
| + |
if (len < tocopy) {
|
| + |
int j;
|
| + |
|
| + |
for (j = 0; j < tocopy-len; j++) free(history[j]);
|
| + |
tocopy = len;
|
| + |
}
|
| + |
memset(new,0,sizeof(char*)*len);
|
| + |
memcpy(new,history+(history_len-tocopy), sizeof(char*)*tocopy);
|
| + |
free(history);
|
| + |
history = new;
|
| + |
}
|
| + |
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++)
|
| + |
fprintf(fp,"%s\n",history[j]);
|
| + |
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 *p;
|
| + |
|
| + |
p = strchr(buf,'\r');
|
| + |
if (!p) p = strchr(buf,'\n');
|
| + |
if (p) *p = '\0';
|
| + |
linenoiseHistoryAdd(buf);
|
| + |
}
|
| + |
fclose(fp);
|
| + |
return 0;
|
| + |
}
|