* 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>
- * All rights reserved.
+ * 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:
+ * 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 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
+ * * 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.
- * * Neither the name of Redis nor the names of its contributors may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * 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.
+ *
+ * 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
* 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
*
*/
if (i == lc.len) beep();
break;
case 27: /* escape */
+ /* Re-show original buffer */
+ if (i < lc.len) {
+ refreshLine(fd,prompt,buf,*len,*pos,cols);
+ }
stop = 1;
break;
default:
- /* update buffer and return */
+ /* Update buffer and return */
if (i < lc.len) {
nwritten = snprintf(buf,buflen,"%s",lc.cvec[i]);
*len = *pos = nwritten;
return c; /* Return last read character */
}
+void linenoiseClearScreen(void) {
+ if (write(STDIN_FILENO,"\x1b[H\x1b[2J",7) <= 0) {
+ /* nothing to do, just to avoid warning. */
+ }
+}
+
static int linenoisePrompt(int fd, char *buf, size_t buflen, const char *prompt) {
size_t plen = strlen(prompt);
size_t pos = 0;
size_t len = 0;
size_t cols = getColumns();
int history_index = 0;
+ size_t old_pos;
+ size_t diff;
buf[0] = '\0';
buflen--; /* Make sure there is always space for the nulterm */
switch(c) {
case 13: /* enter */
- case 4: /* ctrl-d */
history_len--;
free(history[history_len]);
- return (len == 0 && c == 4) ? -1 : (int)len;
+ return (int)len;
case 3: /* ctrl-c */
errno = EAGAIN;
return -1;
refreshLine(fd,prompt,buf,len,pos,cols);
}
break;
+ case 4: /* ctrl-d, remove char at right of cursor */
+ if (len > 1 && pos < (len-1)) {
+ memmove(buf+pos,buf+pos+1,len-pos);
+ len--;
+ buf[len] = '\0';
+ refreshLine(fd,prompt,buf,len,pos,cols);
+ } else if (len == 0) {
+ history_len--;
+ free(history[history_len]);
+ return -1;
+ }
+ break;
case 20: /* ctrl-t */
if (pos > 0 && pos < len) {
int aux = buf[pos-1];
pos = len;
refreshLine(fd,prompt,buf,len,pos,cols);
break;
+ case 12: /* ctrl+l, clear screen */
+ linenoiseClearScreen();
+ refreshLine(fd,prompt,buf,len,pos,cols);
+ break;
+ case 23: /* ctrl+w, delete previous word */
+ old_pos = pos;
+ while (pos > 0 && buf[pos-1] == ' ')
+ pos--;
+ while (pos > 0 && buf[pos-1] != ' ')
+ pos--;
+ diff = old_pos - pos;
+ memmove(&buf[pos], &buf[old_pos], len-old_pos+1);
+ len -= diff;
+ refreshLine(fd,prompt,buf,len,pos,cols);
+ break;
}
}
return len;
projects / redis.git / blobdiff