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cligen_getline.c
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cligen_getline.c
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/*
* Copyright (C) 1991, 1992, 1993 by Chris Thewalt ([email protected])
*
* Permission to use, copy, modify, and distribute this software
* for any purpose and without fee is hereby granted, provided
* that the above copyright notices appear in all copies and that both the
* copyright notice and this permission notice appear in supporting
* documentation. This software is provided "as is" without express or
* implied warranty.
*
* Thanks to the following people who have provided enhancements and fixes:
* Ron Ueberschaer, Christoph Keller, Scott Schwartz, Steven List,
* DaviD W. Sanderson, Goran Bostrom, Michael Gleason, Glenn Kasten,
* Edin Hodzic, Eric J Bivona, Kai Uwe Rommel, Danny Quah, Ulrich Betzler
*/
#include "cligen_config.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include "cligen_buf.h"
#include "cligen_cv.h"
#include "cligen_cvec.h"
#include "cligen_parsetree.h"
#include "cligen_pt_head.h"
#include "cligen_callback.h"
#include "cligen_object.h"
#include "cligen_io.h"
#include "cligen_handle.h"
#include "cligen_history_internal.h"
#include "cligen_getline.h" /* exported interface */
/********************* exported variables ********************************/
int (*gl_in_hook)() = NULL;
int (*gl_out_hook)() = NULL;
int (*gl_tab_hook)() = NULL;
int (*gl_qmark_hook)() = NULL;
int (*gl_susp_hook)() = NULL;
int (*gl_interrupt_hook)() = NULL;
/******************** internal interface *********************************/
/* begin forward declared internal functions */
static void gl_init1(void); /* prepare to edit a line */
static void gl_cleanup(void); /* to undo gl_init1 */
void gl_char_init(void); /* get ready for no echo input */
void gl_char_cleanup(void); /* undo gl_char_init */
static size_t (*gl_strlen)(const char *) = (size_t(*)())strlen;
/* returns printable prompt width */
static int gl_addchar(cligen_handle h, int c); /* install specified char */
static void gl_del(cligen_handle h, int loc); /* del, either left (-1) or cur (0) */
static inline void gl_fixup(cligen_handle h, char*,int,int);/* fixup state variables and screen */
static int gl_getc(cligen_handle h); /* read one char from terminal */
static void gl_kill(cligen_handle h, int pos); /* delete to EOL */
static void gl_kill_begin(cligen_handle h, int pos); /* delete to BEGIN of line */
static int gl_kill_word(cligen_handle h, int pos); /* delete word */
static void gl_newline(cligen_handle); /* handle \n or \r */
static int gl_puts(char *buf); /* write a line to terminal */
static void gl_transpose(cligen_handle h); /* transpose two chars */
static int gl_yank(cligen_handle h); /* yank killed text */
static void gl_word(cligen_handle h, int dir); /* move a word */
static void search_addchar(cligen_handle h, int c); /* increment search string */
static void search_term(cligen_handle); /* reset with current contents */
static void search_back(cligen_handle h, int new); /* look back for current string */
static void search_forw(cligen_handle h, int new); /* look forw for current string */
/* end forward declared internal functions */
/* begin global variables */
static int gl_init_done = -1; /* terminal mode flag */
static int gl_termw = 80; /* actual terminal width */
static int gl_utf8 = 0; /* UTF-8 experimental mode */
static int gl_scrolling_mode = 1; /* Scrolling on / off */
static int gl_scrollw = 27; /* width of EOL scrolling region */
static int gl_width = 0; /* net size available for input */
static int gl_extent = 0; /* how far to redraw, 0 means all */
static int gl_overwrite = 0; /* overwrite mode */
static int gl_pos, gl_cnt = 0; /* position and size of input */
static char gl_intrc = 0; /* keyboard SIGINT char (^C) */
static char gl_quitc = 0; /* keyboard SIGQUIT char (^]) */
static char gl_suspc = 0; /* keyboard SIGTSTP char (^Z) */
static char gl_dsuspc = 0; /* delayed SIGTSTP char */
static int gl_search_mode = 0; /* search mode flag */
static int exitchars[8] = {0,}; /* 8 different exit chars should be enough */
static int gl_iseof = 0;
static int fixup_gl_shift; /* index of first on screen character */
static int fixup_off_right; /* true if more text right of screen */
static int fixup_off_left; /* true if more text left of screen */
static char fixup_last_prompt[80] = "";
#define SEARCH_LEN 100
static char search_prompt[SEARCH_LEN+2]; /* prompt includes search string */
static char search_string[SEARCH_LEN];
static int search_pos = 0; /* current location in search_string */
static int search_forw_flg = 0; /* search direction flag */
static int search_last = 0; /* last match found */
/* end global variables */
/************************ nonportable part *********************************/
#ifdef unix
#ifndef __unix__
#define __unix__
#endif /* not __unix__ */
#endif /* unix */
#ifdef _IBMR2
#ifndef __unix__
#define __unix__
#endif
#endif
#ifdef __GO32__
#include <pc.h>
#undef MSDOS
#undef __unix__
#endif
#ifdef MSDOS
#include <bios.h>
#endif
#if defined(__unix__) || defined(__APPLE__)
#include <unistd.h>
#define POSIX
#ifdef POSIX /* use POSIX interface */
#include <termios.h>
struct termios new_termios, old_termios;
#else /* not POSIX */
#include <sys/ioctl.h>
#ifdef M_XENIX /* does not really use bsd terminal interface */
#undef TIOCSETN
#endif /* M_XENIX */
#ifdef TIOCSETN /* use BSD interface */
#include <sgtty.h>
struct sgttyb new_tty, old_tty;
struct tchars tch;
struct ltchars ltch;
#else /* use SYSV interface */
#include <termio.h>
struct termio new_termio, old_termio;
#endif /* TIOCSETN */
#endif /* POSIX */
#endif /* __unix__ */
#ifdef vms
#include <descrip.h>
#include <ttdef.h>
#include <iodef.h>
#include unixio
static int setbuff[2]; /* buffer to set terminal attributes */
static short chan = -1; /* channel to terminal */
struct dsc$descriptor_s descrip; /* VMS descriptor */
#endif
void
gl_char_init(void) /* turn off input echo */
{
#ifdef __unix__
#ifdef POSIX
tcgetattr(0, &old_termios);
gl_intrc = old_termios.c_cc[VINTR];
gl_quitc = old_termios.c_cc[VQUIT];
#ifdef VSUSP
gl_suspc = old_termios.c_cc[VSUSP];
#endif
#ifdef VDSUSP
gl_dsuspc = old_termios.c_cc[VDSUSP];
#endif
new_termios = old_termios;
new_termios.c_iflag &= ~(BRKINT|ISTRIP|IXON|IXOFF);
new_termios.c_iflag |= (IGNBRK|IGNPAR);
new_termios.c_lflag &= ~(ICANON|ISIG|IEXTEN|ECHO);
new_termios.c_cc[VMIN] = 1;
new_termios.c_cc[VTIME] = 0;
tcsetattr(0, TCSADRAIN, &new_termios);
#else /* not POSIX */
#ifdef TIOCSETN /* BSD */
ioctl(0, TIOCGETC, &tch);
ioctl(0, TIOCGLTC, <ch);
gl_intrc = tch.t_intrc;
gl_quitc = tch.t_quitc;
gl_suspc = ltch.t_suspc;
gl_dsuspc = ltch.t_dsuspc;
ioctl(0, TIOCGETP, &old_tty);
new_tty = old_tty;
new_tty.sg_flags |= RAW;
new_tty.sg_flags &= ~ECHO;
ioctl(0, TIOCSETN, &new_tty);
#else /* SYSV */
ioctl(0, TCGETA, &old_termio);
gl_intrc = old_termio.c_cc[VINTR];
gl_quitc = old_termio.c_cc[VQUIT];
new_termio = old_termio;
new_termio.c_iflag &= ~(BRKINT|ISTRIP|IXON|IXOFF);
new_termio.c_iflag |= (IGNBRK|IGNPAR);
new_termio.c_lflag &= ~(ICANON|ISIG|ECHO);
new_termio.c_cc[VMIN] = 1;
new_termio.c_cc[VTIME] = 0;
ioctl(0, TCSETA, &new_termio);
#endif /* TIOCSETN */
#endif /* POSIX */
#endif /* __unix__ */
#ifdef vms
descrip.dsc$w_length = strlen("tt:");
descrip.dsc$b_dtype = DSC$K_DTYPE_T;
descrip.dsc$b_class = DSC$K_CLASS_S;
descrip.dsc$a_pointer = "tt:";
(void)sys$assign(&descrip,&chan,0,0);
(void)sys$qiow(0,chan,IO$_SENSEMODE,0,0,0,setbuff,8,0,0,0,0);
setbuff[1] |= TT$M_NOECHO;
(void)sys$qiow(0,chan,IO$_SETMODE,0,0,0,setbuff,8,0,0,0,0);
#endif /* vms */
}
void
gl_char_cleanup(void) /* undo effects of gl_char_init */
{
#ifdef __unix__
#ifdef POSIX
tcsetattr(0, TCSADRAIN, &old_termios);
#else /* not POSIX */
#ifdef TIOCSETN /* BSD */
ioctl(0, TIOCSETN, &old_tty);
#else /* SYSV */
ioctl(0, TCSETA, &old_termio);
#endif /* TIOCSETN */
#endif /* POSIX */
#endif /* __unix__ */
#ifdef vms
setbuff[1] &= ~TT$M_NOECHO;
(void)sys$qiow(0,chan,IO$_SETMODE,0,0,0,setbuff,8,0,0,0,0);
sys$dassgn(chan);
chan = -1;
#endif
}
#if MSDOS || __EMX__ || __GO32__
int pc_keymap(int c)
{
switch (c) {
case 72: c = 16; /* up -> ^P */
break;
case 80: c = 14; /* down -> ^N */
break;
case 75: c = 2; /* left -> ^B */
break;
case 77: c = 6; /* right -> ^F */
break;
default: c = 0; /* make it garbage */
}
return c;
}
#endif /* MSDOS || __EMX__ || __GO32__ */
#if CLIGEN_REGFD
struct regfd {
int fd;
int (*cb)(int, void*);
void *arg;
};
static int nextfds = 0;
static struct regfd *extfds = NULL;
/* XXX: If arg is malloced, the treatment of arg creates leaks */
int
gl_regfd(int fd,
cligen_fd_cb_t *cb,
void *arg)
{
int i;
struct regfd *tmp;
for (i = 0; i < nextfds; i++) {
if (extfds[i].fd == fd) { /* Already registered. Update arg and cb */
extfds[i].cb = cb;
extfds[i].arg = arg;
return 0;
}
}
if ((tmp = realloc(extfds, (nextfds+1) * sizeof(*extfds))) == NULL)
return -1;
tmp[nextfds].fd = fd;
tmp[nextfds].cb = cb;
tmp[nextfds].arg = arg;
extfds = tmp;
nextfds++;
return 0;
}
int
gl_unregfd(int fd)
{
int i;
for (i = 0; i < nextfds; i++) {
if (extfds[i].fd == fd) {
if (i+1 < nextfds)
memcpy(&extfds[i], &extfds[i+1], nextfds-i);
extfds = realloc(extfds, (nextfds-1) * sizeof(*extfds));
nextfds--;
return 0;
}
}
return -1;
}
int
gl_select()
{
int i;
fd_set fdset = {0,};
while (1){
FD_ZERO(&fdset);
FD_SET(0, &fdset);
for(i = 0; i < nextfds; i++)
FD_SET(extfds[i].fd, &fdset);
if (select(FD_SETSIZE, &fdset, NULL, NULL, NULL) < 0)
return -1;
for(i = 0; i < nextfds; i++)
if (FD_ISSET(extfds[i].fd, &fdset))
if (extfds[i].cb(extfds[i].fd, extfds[i].arg) < 0)
return -1;
if (FD_ISSET(0, &fdset))
break;
}
return 0;
}
#endif
int
gl_eof()
{
return gl_iseof;
}
void
gl_exitchar_add(char c)
{
int i;
for (i=0;sizeof(exitchars);i++)
if (!exitchars[i]){
exitchars[i] = c;
break;
}
}
/*! Check if c is an exit char */
static int
gl_exitchar(char c)
{
int i;
for (i=0;sizeof(exitchars);i++){
if (!exitchars[i])
break;
if (exitchars[i] == c)
return 1;
}
return 0; /* ^C */
}
/*! Initiate an exit, not actually made, but gl_exiting() will return 1.
* @param[in] h CLIgen handle
*/
static char *
gl_exit(cligen_handle h)
{
char *gl_buf = cligen_buf(h);
gl_iseof++;
gl_buf[0] = 0;
gl_cleanup();
gl_putc('\n');
return gl_buf;
}
/*! Get a character without echoing it to screen
*
* @param[in] h CLIgen handle
*/
static int
gl_getc(cligen_handle h)
{
int c;
#ifdef __unix__
unsigned char ch;
#endif
#if CLIGEN_REGFD
gl_select(); /* block until something arrives on stdin */
#endif
#ifdef __unix__
while ((c = read(0, &ch, 1)) == -1) {
if (errno == EINTR){
if (gl_interrupt_hook(h) <0)
return -1;
continue;
}
break;
}
if (c == 0){
gl_iseof++;
cligen_buf(h)[0] = 0; /* clean exit from gl? */
gl_cleanup();
gl_putc('\n');
return -1;
}
c = (ch <= 0)? -1 : ch;
#endif /* __unix__ */
#ifdef MSDOS
c = _bios_keybrd(_NKEYBRD_READ);
#endif /* MSDOS */
#ifdef __GO32__
c = getkey() ;
if (c > 255) c = pc_keymap(c & 0377);
#endif /* __GO32__ */
#ifdef __TURBOC__
while(!bioskey(1))
;
c = bioskey(0);
#endif
#if MSDOS || __TURBOC__
if ((c & 0377) == 224) {
c = pc_keymap((c >> 8) & 0377);
} else {
c &= 0377;
}
#endif /* MSDOS || __TURBOC__ */
#ifdef __EMX__
c = _read_kbd(0, 1, 0);
if (c == 224 || c == 0) {
c = pc_keymap(_read_kbd(0, 1, 0));
} else {
c &= 0377;
}
#endif
#ifdef vms
if(chan < 0) {
c='\0';
}
(void)sys$qiow(0,chan,IO$_TTYREADALL,0,0,0,&c,1,0,0,0,0);
c &= 0177; /* get a char */
#endif
return c;
}
int
gl_putc(int c)
{
char ch = c;
if (write(1, &ch, 1) < 0)
return -1;
if (ch == '\n') {
ch = '\r'; /* RAW mode needs '\r', does not hurt */
if (write(1, &ch, 1) < 0)
return -1;
}
return 0;
}
/******************** fairly portable part *********************************/
static int
gl_puts(char *buf)
{
int len;
if (buf) {
len = strlen(buf);
if (write(1, buf, len) < 0)
return -1;
}
return 0;
}
/*! set up variables and terminal
*
* @see gl_init cal this once first
*/
static void
gl_init1()
{
gl_iseof = 0;
gl_char_init();
gl_init_done = 1;
}
/*! undo effects of gl_init1, as necessary */
static void
gl_cleanup()
{
if (gl_init_done > 0)
gl_char_cleanup();
gl_init_done = 0;
}
int
gl_getscrolling(void)
{
return gl_scrolling_mode;
}
void
gl_setscrolling(int mode)
{
gl_scrolling_mode = mode;
}
int
gl_getwidth(void)
{
return gl_termw;
}
/*! Set UTF-8 experimental mode
*
* @param[in] enabled Set to 1 to enable UTF-8 experimental mode
*/
int
gl_utf8_set(int mode)
{
gl_utf8 = mode;
return 0;
}
/*! get UTF-8 experimental mode
*
* @retval 0 UTF-8 is disabled
* @retval 1 UTF-8 is enabled
*/
int
gl_utf8_get(void)
{
return gl_utf8;
}
int
gl_setwidth(int w)
{
if (w < TERM_MIN_SCREEN_WIDTH)
return -1;
gl_termw = w;
gl_scrollw = w / 3;
return 0;
}
/*! Main getline function handling a command line
*
* @param[in] h CLIgen handle
* @param[out] buf Pointer to char* buffer containing CLIgen command
* @retval 0 OK: string or EOF
* @retval -1 Error
* Typically called by cliread.
*/
int
gl_getline(cligen_handle h,
char **buf)
{
int c;
int loc;
int tmp;
char *gl_prompt;
int escape = 0;
#ifdef __unix__
int sig;
#endif
gl_init1();
gl_prompt = (cligen_prompt(h))? cligen_prompt(h) : "";
cligen_buf(h)[0] = 0;
if (gl_in_hook)
gl_in_hook(h, cligen_buf(h));
gl_fixup(h, gl_prompt, -2, cligen_buf_size(h));
while ((c = gl_getc(h)) >= 0) { /* tainted data needs to be sanitized */
gl_extent = 0; /* reset to full extent */
if (isprint(c) || (escape && c=='\n')) {
if (escape == 0 && c == '\\')
escape++;
else{
if (escape ==0 && c == '?' && gl_qmark_hook) {
escape = 0;
if ((loc = gl_qmark_hook(h, cligen_buf(h))) < 0)
goto err;
gl_fixup(h, gl_prompt, -2, gl_pos);
}
else{
escape = 0;
if (gl_search_mode)
search_addchar(h, c);
else
if (gl_addchar(h, c) < 0)
goto err;
}
}
} else {
escape = 0;
if (gl_search_mode) { /* after ^S or ^R */
if (c == '\033') { /* ESC */
search_term(h);
}
else if (c == '\016' || c == '\020') { /* ^N, ^P */
search_term(h);
c = 0; /* ignore the character */
} else if (c == '\010' || c == '\177') { /* del */
search_addchar(h, -1); /* unwind search string */
c = 0;
} else if (c != '\022' && c != '\023') { /* ^R ^S */
search_term(h); /* terminate and handle char */
}
}
/* special exit characters */
if (gl_exitchar(c))
goto exit;
switch (c) {
case '\n': case '\r': /* newline */
gl_newline(h);
goto done;
/*NOTREACHED*/
break;
case '\001': gl_fixup(h, gl_prompt, -1, 0); /* ^A */
break;
case '\002': gl_fixup(h, gl_prompt, -1, gl_pos-1); /* ^B */
break;
case '\004': /* ^D */
if (gl_cnt == 0)
goto exit;
else
gl_del(h, 0);
break;
case '\005': gl_fixup(h, gl_prompt, -1, gl_cnt); /* ^E */
break;
case '\006': gl_fixup(h, gl_prompt, -1, gl_pos+1); /* ^F */
break;
case '\010': case '\177': gl_del(h, -1); /* ^H and DEL */
break;
case '\t': /* TAB */
if (gl_tab_hook) {
tmp = gl_pos;
if ((loc = gl_tab_hook(h, &tmp)) < 0)
goto err;
gl_fixup(h, gl_prompt, -2, tmp);
#if 0
if (loc != -1 || tmp != gl_pos)
gl_fixup(h, gl_prompt, loc, tmp);
#endif
}
break;
case '\013': gl_kill(h, gl_pos); /* ^K */
break;
case '\014':
gl_clear_screen(h); /* ^L */
break;
case '\016': /* ^N */
hist_copy_next(h);
if (gl_in_hook)
gl_in_hook(h, cligen_buf(h));
gl_fixup(h, gl_prompt, 0, cligen_buf_size(h));
break;
case '\017': gl_overwrite = !gl_overwrite; /* ^O */
break;
case '\020': /* ^P */
hist_copy_prev(h);
if (gl_in_hook)
gl_in_hook(h, cligen_buf(h));
gl_fixup(h, gl_prompt, 0, cligen_buf_size(h));
break;
case '\022': search_back(h, 1); /* ^R */
break;
case '\023': search_forw(h, 1); /* ^S */
break;
case '\024': gl_transpose(h); /* ^T */
break;
case '\025': gl_kill_begin(h, gl_pos); /* ^U */
break;
case '\027': if (gl_kill_word(h, gl_pos) < 0) goto err;/* ^W */
break;
case '\031': if (gl_yank(h) < 0) goto err; /* ^Y */
break;
case '\032': /* ^Z */
if(gl_susp_hook) {
tmp = gl_pos;
loc = gl_susp_hook(cligen_userhandle(h)?cligen_userhandle(h):h,
cligen_buf(h), gl_strlen(gl_prompt), &tmp);
if (loc != -1 || tmp != gl_pos)
gl_fixup(h, gl_prompt, loc, tmp);
if (strchr (cligen_buf(h), '\n'))
goto done;
}
break;
case '\033': /* ansi arrow keys (ESC) */
c = gl_getc(h);
/* ESC-[ is normal and ESC-O is application cursor keys */
if (c == '[' || c == 'O') {
switch(c = gl_getc(h)) {
case 'A': /* up */
hist_copy_prev(h);
if (gl_in_hook)
gl_in_hook(h, cligen_buf(h));
gl_fixup(h, gl_prompt, 0, cligen_buf_size(h));
break;
case 'B': /* down */
hist_copy_next(h);
if (gl_in_hook)
gl_in_hook(h, cligen_buf(h));
gl_fixup(h, gl_prompt, 0, cligen_buf_size(h));
break;
case 'C': gl_fixup(h, gl_prompt, -1, gl_pos+1); /* right */
break;
case 'D': gl_fixup(h, gl_prompt, -1, gl_pos-1); /* left */
break;
case 'H': gl_fixup(h, gl_prompt, -1, 0); /* home */
break;
case 'F': gl_fixup(h, gl_prompt, -1, cligen_buf_size(h)); /* end */
break;
case '3': /* del */
if (gl_getc(h) != '~')
break;
gl_del(h, 0);
break;
default: gl_putc('\007'); /* who knows */
break;
}
} else if (c == 'f' || c == 'F') {
gl_word(h, 1);
} else if (c == 'b' || c == 'B') {
gl_word(h, -1);
} else
gl_putc('\007');
break;
default: /* check for a terminal signal */
#ifdef __unix__
if ((c & 0xe0) == 0xc0){ /* UTF-2 */
int c2;
c2 = gl_getc(h);
if (gl_utf8){
if (gl_addchar(h, c) < 0)
goto err;
if (gl_addchar(h, c2) < 0)
goto err;
}
}
else if ((c & 0xf0) == 0xe0){ /* UTF-2 */
int c2, c3;
c2 = gl_getc(h);
c3 = gl_getc(h);
if (gl_utf8){
if (gl_addchar(h, c) < 0)
goto err;
if (gl_addchar(h, c2) < 0)
goto err;
if (gl_addchar(h, c3) < 0)
goto err;
}
}
else if ((c & 0xf8) == 0xf0){ /* UTF-3 */
int c2, c3, c4;
c2 = gl_getc(h);
c3 = gl_getc(h);
c4 = gl_getc(h);
if (gl_utf8){
if (gl_addchar(h, c) < 0)
goto err;
if (gl_addchar(h, c2) < 0)
goto err;
if (gl_addchar(h, c3) < 0)
goto err;
if (gl_addchar(h, c4) < 0)
goto err;
}
}
if (c > 0) { /* ignore 0 (reset above) */
sig = 0;
#ifdef SIGINT
if (c == gl_intrc)
sig = SIGINT;
#endif
#ifdef SIGQUIT
if (c == gl_quitc)
sig = SIGQUIT;
#endif
#ifdef SIGTSTP
if (c == gl_suspc || c == gl_dsuspc)
sig = SIGTSTP;
#endif
if (sig != 0) {
gl_cleanup();
kill(0, sig);
gl_init1();
gl_redraw(h);
gl_kill(h, 0);
c = 0;
}
}
#endif /* __unix__ */
if (c > 0)
gl_putc('\007');
break;
}
}
} /* while */
cligen_buf(h)[0] = 0;
done:
gl_cleanup();
*buf = cligen_buf(h);
return 0;
exit: /* ie exit from cli, not necessarily error */
gl_exit(h);
*buf = cligen_buf(h);
return 0;
err: /* fatal error */
gl_cleanup();
return -1;
}
/*! Add the character c to the input buffer at current location
*
* @param[in] h CLIgen handle
* @param[in] c Character
*/
static int
gl_addchar(cligen_handle h,
int c)
{
int i;
if (cligen_buf_increase(h, gl_cnt+1) < 0) /* assume increase enough for gl_pos-gl_cnt */
return -1;
if (gl_overwrite == 0 || gl_pos == gl_cnt) {
for (i=gl_cnt; i >= gl_pos; i--)
cligen_buf(h)[i+1] = cligen_buf(h)[i];
cligen_buf(h)[gl_pos] = c;
gl_fixup(h, cligen_prompt(h), gl_pos, gl_pos+1);
} else {
cligen_buf(h)[gl_pos] = c;
gl_extent = 1;
gl_fixup(h, cligen_prompt(h), gl_pos, gl_pos+1);
}
return 0;
}
/*! Add the kill buffer to the input buffer at current location
*
* @param[in] h CLIgen handle
*/
static int
gl_yank(cligen_handle h)
{
int i, len;
len = strlen(cligen_killbuf(h));
if (len > 0) {
if (gl_overwrite == 0) {
if (cligen_buf_increase(h, gl_cnt + len + 1) < 0)
return -1;
for (i=gl_cnt; i >= gl_pos; i--)
cligen_buf(h)[i+len] = cligen_buf(h)[i];
for (i=0; i < len; i++)
cligen_buf(h)[gl_pos+i] = cligen_killbuf(h)[i];
gl_fixup(h, cligen_prompt(h), gl_pos, gl_pos+len);
} else {
if (gl_pos + len > gl_cnt) {
if (cligen_buf_increase(h, gl_pos + len + 1) < 0)
return -1;
cligen_buf(h)[gl_pos + len] = 0;
}
for (i=0; i < len; i++)
cligen_buf(h)[gl_pos+i] = cligen_killbuf(h)[i];
gl_extent = len;
gl_fixup(h, cligen_prompt(h), gl_pos, gl_pos+len);
}
} else
gl_putc('\007');
return 0;
}
/*! Switch character under cursor and to left of cursor
*
* @param[in] h CLIgen handle
*/
static void
gl_transpose(cligen_handle h)
{
int c;
if (gl_pos > 0 && gl_cnt > gl_pos) {
c = cligen_buf(h)[gl_pos-1];
cligen_buf(h)[gl_pos-1] = cligen_buf(h)[gl_pos];
cligen_buf(h)[gl_pos] = c;
gl_extent = 2;
gl_fixup(h, cligen_prompt(h), gl_pos-1, gl_pos);
} else
gl_putc('\007');
}
/*! Cleans up entire line before returning to caller.
*
* @param[in] h CLIgen handle
* A \n is appended. If line longer than screen, redraw starting at beginning
*/
static void
gl_newline(cligen_handle h)
{
int len = gl_cnt;
int loc;
if (gl_scrolling_mode)
loc = gl_width - 5; /* shifts line back to start position */
else
loc = gl_cnt;
cligen_buf_increase(h, gl_cnt+1); /* \n\0 added */
if (gl_out_hook) {
len = strlen(cligen_buf(h));
}
if (loc > len)
loc = len;
gl_fixup(h, cligen_prompt(h), -1, loc); /* must do this before appending \n */
cligen_buf(h)[len] = '\n';
cligen_buf(h)[len+1] = '\0';
gl_putc('\n');
}
/*! Delete a character.
*
* @param[in] h CLIgen handle
* @param[in] loc -1 : delete character to left of cursor
* 0 : delete character under cursor
*/
static void
gl_del(cligen_handle h,
int loc)
{
int i;
if ((loc == -1 && gl_pos > 0) || (loc == 0 && gl_pos < gl_cnt)) {
for (i=gl_pos+loc; i < gl_cnt; i++)
cligen_buf(h)[i] = cligen_buf(h)[i+1];
gl_fixup(h, cligen_prompt(h), gl_pos+loc, gl_pos+loc);
} else
gl_putc('\007');
}
/*! Delete position to end of line
*
* @param[in] h CLIgen handle
* @param[in] pos Delete from pos to the end of line
*/
static void
gl_kill(cligen_handle h,
int pos)
{
if (pos < gl_cnt) {
cligen_killbuf_increase(h, cligen_buf_size(h));
strncpy(cligen_killbuf(h), cligen_buf(h) + pos, cligen_buf_size(h));
cligen_buf(h)[pos] = '\0';
gl_fixup(h, cligen_prompt(h), pos, pos);
} else
gl_putc('\007');
}
/* Delete from pos to start of line
*
* @param[in] h CLIgen handle
* @param[in] pos Delete from pos to start of line
*/
static void
gl_kill_begin(cligen_handle h,
int pos)
{
int i;
int len;