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#ifndef lint
static char *RCSid() { return RCSid("$Id: readline.c,v 1.58.2.1 2014/01/11 16:22:13 markisch Exp $"); }
#endif
/* GNUPLOT - readline.c */
/*[
* Copyright 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
/*
* AUTHORS
*
* Original Software:
* Tom Tkacik
*
* Msdos port and some enhancements:
* Gershon Elber and many others.
*
* Adapted to work with UTF-8 enconding.
* Ethan A Merritt April 2011
*/
#include <signal.h>
#include "stdfn.h"
#include "readline.h"
#include "alloc.h"
#include "gp_hist.h"
#include "plot.h"
#include "util.h"
#include "term_api.h"
#ifdef HAVE_WCHAR_H
#include <wchar.h>
#endif
#if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDITLINE)
#if defined(HAVE_LIBEDITLINE)
int
#else
static int
#endif
#if defined(HAVE_LIBEDITLINE)
getc_wrapper(FILE* fp /* is NULL, supplied by libedit */)
#else
getc_wrapper(FILE* fp /* should be stdin, supplied by readline */)
#endif
{
int c;
while (1) {
#ifdef USE_MOUSE
if (term && term->waitforinput && interactive) {
c = term->waitforinput();
}
else
#endif
if (fp)
c = getc(fp);
else
c = getchar(); /* HAVE_LIBEDITLINE */
if (c == EOF && errno == EINTR)
continue;
return c;
}
}
#endif /* HAVE_LIBREADLINE || HAVE_LIBEDITLINE */
#if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDITLINE) || defined(READLINE)
char*
readline_ipc(const char* prompt)
{
#if defined(PIPE_IPC) && defined(HAVE_LIBREADLINE)
rl_getc_function = getc_wrapper;
#endif
return readline((const char*) prompt);
}
#endif /* HAVE_LIBREADLINE || HAVE_LIBEDITLINE || READLINE */
#if defined(READLINE) && !(defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDITLINE))
/* This is a small portable version of GNU's readline that does not require
* any terminal capabilities except backspace and space overwrites a character.
* It is not the BASH or GNU EMACS version of READLINE due to Copyleft
* restrictions.
* Configuration option: ./configure --with-readline=builtin
*/
/* NANO-EMACS line editing facility
* printable characters print as themselves (insert not overwrite)
* ^A moves to the beginning of the line
* ^B moves back a single character
* ^E moves to the end of the line
* ^F moves forward a single character
* ^K kills from current position to the end of line
* ^P moves back through history
* ^N moves forward through history
* ^H deletes the previous character
* ^D deletes the current character, or EOF if line is empty
* ^L/^R redraw line in case it gets trashed
* ^U kills the entire line
* ^W deletes previous full or partial word
* LF and CR return the entire line regardless of the cursor postition
* DEL deletes previous or current character (configuration dependent)
* EOF with an empty line returns (char *)NULL
*
* all other characters are ignored
*/
#ifdef HAVE_SYS_IOCTL_H
/* For ioctl() prototype under Linux (and BeOS?) */
# include <sys/ioctl.h>
#endif
/* replaces the previous klugde in configure */
#if defined(HAVE_TERMIOS_H) && defined(HAVE_TCGETATTR)
# define TERMIOS
#else /* not HAVE_TERMIOS_H && HAVE_TCGETATTR */
# ifdef HAVE_SGTTY_H
# define SGTTY
# endif
#endif /* not HAVE_TERMIOS_H && HAVE_TCGETATTR */
#if !defined(MSDOS) && !defined(_Windows)
/*
* Set up structures using the proper include file
*/
# if defined(_IBMR2) || defined(alliant)
# define SGTTY
# endif
/* submitted by Francois.Dagorn@cicb.fr */
# ifdef SGTTY
# include <sgtty.h>
static struct sgttyb orig_termio, rl_termio;
/* define terminal control characters */
static struct tchars s_tchars;
# ifndef VERASE
# define VERASE 0
# endif /* not VERASE */
# ifndef VEOF
# define VEOF 1
# endif /* not VEOF */
# ifndef VKILL
# define VKILL 2
# endif /* not VKILL */
# ifdef TIOCGLTC /* available only with the 'new' line discipline */
static struct ltchars s_ltchars;
# ifndef VWERASE
# define VWERASE 3
# endif /* not VWERASE */
# ifndef VREPRINT
# define VREPRINT 4
# endif /* not VREPRINT */
# ifndef VSUSP
# define VSUSP 5
# endif /* not VSUP */
# endif /* TIOCGLTC */
# ifndef NCCS
# define NCCS 6
# endif /* not NCCS */
# else /* not SGTTY */
/* SIGTSTP defines job control
* if there is job control then we need termios.h instead of termio.h
* (Are there any systems with job control that use termio.h? I hope not.)
*/
# if defined(SIGTSTP) || defined(TERMIOS)
# ifndef TERMIOS
# define TERMIOS
# endif /* not TERMIOS */
# include <termios.h>
/* Added by Robert Eckardt, RobertE@beta.TP2.Ruhr-Uni-Bochum.de */
# ifdef ISC22
# ifndef ONOCR /* taken from sys/termio.h */
# define ONOCR 0000020 /* true at least for ISC 2.2 */
# endif /* not ONOCR */
# ifndef IUCLC
# define IUCLC 0001000
# endif /* not IUCLC */
# endif /* ISC22 */
# if !defined(IUCLC)
/* translate upper to lower case not supported */
# define IUCLC 0
# endif /* not IUCLC */
static struct termios orig_termio, rl_termio;
# else /* not SIGSTP || TERMIOS */
# include <termio.h>
static struct termio orig_termio, rl_termio;
/* termio defines NCC instead of NCCS */
# define NCCS NCC
# endif /* not SIGTSTP || TERMIOS */
# endif /* SGTTY */
/* ULTRIX defines VRPRNT instead of VREPRINT */
# if defined(VRPRNT) && !defined(VREPRINT)
# define VREPRINT VRPRNT
# endif /* VRPRNT */
/* define characters to use with our input character handler */
static char term_chars[NCCS];
static int term_set = 0; /* =1 if rl_termio set */
#define special_getc() ansi_getc()
static int ansi_getc __PROTO((void));
#define DEL_ERASES_CURRENT_CHAR
#else /* MSDOS or _Windows */
# ifdef _Windows
# include <windows.h>
# include "win/wtext.h"
# include "win/winmain.h"
# define TEXTUSER 0xf1
# define TEXTGNUPLOT 0xf0
# ifdef WGP_CONSOLE
# define special_getc() win_getch()
static char win_getch __PROTO((void));
# else
# define special_getc() msdos_getch()
# endif /* WGP_CONSOLE */
static char msdos_getch __PROTO((void)); /* HBB 980308: PROTO'ed it */
# define DEL_ERASES_CURRENT_CHAR
# endif /* _Windows */
# if defined(MSDOS)
/* MSDOS specific stuff */
# ifdef DJGPP
# include <pc.h>
# endif /* DJGPP */
# if defined(__EMX__) || defined (__WATCOMC__)
# include <conio.h>
# endif /* __EMX__ */
# define special_getc() msdos_getch()
static char msdos_getch();
# define DEL_ERASES_CURRENT_CHAR
# endif /* MSDOS */
#endif /* MSDOS or _Windows */
#ifdef OS2
# if defined( special_getc )
# undef special_getc()
# endif /* special_getc */
# define special_getc() os2_getch()
static char msdos_getch __PROTO((void)); /* HBB 980308: PROTO'ed it */
static char os2_getch __PROTO((void));
# define DEL_ERASES_CURRENT_CHAR
#endif /* OS2 */
/* initial size and increment of input line length */
#define MAXBUF 1024
#define BACKSPACE 0x08 /* ^H */
#define SPACE ' '
#define NEWLINE '\n'
#define MAX_COMPLETIONS 50
static char *cur_line; /* current contents of the line */
static size_t line_len = 0;
static size_t cur_pos = 0; /* current position of the cursor */
static size_t max_pos = 0; /* maximum character position */
static void fix_line __PROTO((void));
static void redraw_line __PROTO((const char *prompt));
static void clear_line __PROTO((const char *prompt));
static void clear_eoline __PROTO((const char *prompt));
static void delete_previous_word __PROTO((void));
static void copy_line __PROTO((char *line));
static void set_termio __PROTO((void));
static void reset_termio __PROTO((void));
static int user_putc __PROTO((int ch));
static int user_puts __PROTO((char *str));
static int backspace __PROTO((void));
static void extend_cur_line __PROTO((void));
static void step_forward __PROTO((void));
static void delete_forward __PROTO((void));
static void delete_backward __PROTO((void));
static int char_seqlen __PROTO((void));
#if defined(HAVE_DIRENT_H) || defined(WIN32)
static char *fn_completion(size_t anchor_pos, int direction);
static void tab_completion(TBOOLEAN forward);
#endif
/* user_putc and user_puts should be used in the place of
* fputc(ch,stderr) and fputs(str,stderr) for all output
* of user typed characters. This allows MS-Windows to
* display user input in a different color.
*/
static int
user_putc(int ch)
{
int rv;
#ifdef _Windows
#ifndef WGP_CONSOLE
TextAttr(&textwin, TEXTUSER);
#endif
#endif
rv = fputc(ch, stderr);
#ifdef _Windows
#ifndef WGP_CONSOLE
TextAttr(&textwin, TEXTGNUPLOT);
#endif
#endif
return rv;
}
static int
user_puts(char *str)
{
int rv;
#ifdef _Windows
#ifndef WGP_CONSOLE
TextAttr(&textwin, TEXTUSER);
#endif
#endif
rv = fputs(str, stderr);
#ifdef _Windows
#ifndef WGP_CONSOLE
TextAttr(&textwin, TEXTGNUPLOT);
#endif
#endif
return rv;
}
/* EAM FIXME
* This test is intended to determine if the current character, of which
* we have only seen the first byte so far, will require twice the width
* of an ascii character. The test catches glyphs above unicode 0x3000,
* which is roughly the set of CJK characters.
* It should be replaced with a more accurate test.
*/
static int
mbwidth(char *c)
{
switch (encoding) {
case S_ENC_UTF8: {
#if defined(HAVE_WCHAR_H) && defined(HAVE_WCWIDTH)
wchar_t wc;
if (mbtowc(&wc, c, MB_CUR_MAX) < 0)
return 1;
else
return wcwidth(wc);
#else
return ((unsigned char)(*c) >= 0xe3 ? 2 : 1);
#endif
}
default:
return 1;
}
}
static int
isdoublewidth(size_t pos)
{
return mbwidth(cur_line + pos) > 1;
}
/*
* Determine length of multi-byte sequence starting at current position
*/
static int
char_seqlen()
{
int i;
switch (encoding) {
case S_ENC_UTF8:
i = cur_pos;
do {i++;}
while ((cur_line[i] & 0xc0) != 0xc0
&& (cur_line[i] & 0x80) != 0
&& i < max_pos);
return (i - cur_pos);
default:
return 1;
}
}
/*
* Back up over one multi-byte UTF-8 character sequence immediately preceding
* the current position. Non-destructive. Affects both cur_pos and screen cursor.
*/
static int
backspace()
{
int seqlen;
switch (encoding) {
case S_ENC_UTF8:
seqlen = 0;
do {cur_pos--; seqlen++;}
while ((cur_line[cur_pos] & 0xc0) != 0xc0
&& (cur_line[cur_pos] & 0x80) != 0
&& cur_pos > 0);
if ((cur_line[cur_pos] & 0xc0) == 0xc0
|| isprint(cur_line[cur_pos]))
user_putc(BACKSPACE);
if (isdoublewidth(cur_pos))
user_putc(BACKSPACE);
return seqlen;
default:
cur_pos--;
user_putc(BACKSPACE);
return 1;
}
}
/*
* Step forward over one multi-byte character sequence.
* We don't assume a non-destructive forward space, so we have
* to redraw the character as we go.
*/
static void
step_forward()
{
int i, seqlen;
switch (encoding) {
case S_ENC_UTF8:
seqlen = char_seqlen();
for (i=0; i<seqlen; i++)
user_putc(cur_line[cur_pos++]);
break;
default:
user_putc(cur_line[cur_pos++]);
break;
}
}
/*
* Delete the character we are on and collapse all subsequent characters back one
*/
static void
delete_forward()
{
if (cur_pos < max_pos) {
size_t i;
int seqlen = char_seqlen();
max_pos -= seqlen;
for (i = cur_pos; i < max_pos; i++)
cur_line[i] = cur_line[i + seqlen];
cur_line[max_pos] = '\0';
fix_line();
}
}
/*
* Delete the previous character and collapse all subsequent characters back one
*/
static void
delete_backward()
{
if (cur_pos > 0) {
size_t i;
int seqlen = backspace();
max_pos -= seqlen;
for (i = cur_pos; i < max_pos; i++)
cur_line[i] = cur_line[i + seqlen];
cur_line[max_pos] = '\0';
fix_line();
}
}
static void
extend_cur_line()
{
char *new_line;
/* extent input line length */
new_line = gp_realloc(cur_line, line_len + MAXBUF, NULL);
if (!new_line) {
reset_termio();
int_error(NO_CARET, "Can't extend readline length");
}
cur_line = new_line;
line_len += MAXBUF;
FPRINTF((stderr, "\nextending readline length to %d chars\n", line_len));
}
#if defined(HAVE_DIRENT_H) || defined(WIN32)
static char *
fn_completion(size_t anchor_pos, int direction)
{
static char * completions[MAX_COMPLETIONS];
static int n_completions = 0;
static int completion_idx = 0;
if (direction == 0) {
/* new completion */
DIR * dir;
char * start, * path;
char * t, * search;
char * name = NULL;
size_t nlen;
if (n_completions != 0) {
/* new completion, cleanup first */
int i;
for (i = 0; i < n_completions; i++)
free(completions[i]);
memset(completions, 0, sizeof(completions));
n_completions = 0;
completion_idx = 0;
}
/* extract path to complete */
start = cur_line + anchor_pos;
if (anchor_pos > 0) {
/* first, look for a quote to start the string */
for ( ; start > cur_line; start--) {
if ((*start == '"') || (*start == '\'')) {
start++;
break;
}
}
/* if not found, search for a space instead */
if (start == cur_line) {
for (start = cur_line + anchor_pos ; start > cur_line; start--) {
if ((*start == ' ') || (*start == '!')) {
start++;
break;
}
}
}
path = strndup(start, cur_line - start + anchor_pos);
gp_expand_tilde(&path);
} else {
path = gp_strdup("");
}
/* seperate directory and (partial) file directory name */
t = strrchr(path, DIRSEP1);
#if DIRSEP2 != NUL
if (t == NULL) t = strrchr(path, DIRSEP2);
#endif
if (t == NULL) {
/* name... */
search = gp_strdup(".");
name = strdup(path);
} else if (t == path) {
/* root dir: /name... */
search = strndup(path, 1);
nlen = cur_pos - (t - path) - 1;
name = strndup(t + 1, nlen);
} else {
/* normal case: dir/dir/name... */
search = strndup(path, t - path);
nlen = cur_pos - (t - path) - 1;
name = strndup(t + 1, nlen);
}
nlen = strlen(name);
free(path);
n_completions = 0;
if ((dir = opendir(search))) {
struct dirent * entry;
while ((entry = readdir(dir)) != NULL) {
/* ignore files and directories starting with a dot */
if (entry->d_name[0] == '.')
continue;
/* skip entries which don't match */
if (nlen > 0)
if (strncmp(entry->d_name, name, nlen) != 0) continue;
completions[n_completions] = gp_strdup(entry->d_name + nlen);
n_completions++;
/* limit number of completions */
if (n_completions == MAX_COMPLETIONS) break;
}
closedir(dir);
free(search);
if (name) free(name);
if (n_completions > 0)
return completions[0];
else
return NULL;
}
free(search);
if (name) free(name);
} else {
/* cycle trough previous results */
if (n_completions > 0) {
if (direction > 0)
completion_idx = (completion_idx + 1) % n_completions;
else
completion_idx = (completion_idx + n_completions - 1) % n_completions;
return completions[completion_idx];
} else
return NULL;
}
return NULL;
}
static void
tab_completion(TBOOLEAN forward)
{
size_t i;
char * completion;
size_t completion_len;
static size_t last_tab_pos = -1;
static size_t last_completion_len = 0;
int direction;
/* detect tab cycling */
if ((last_tab_pos + last_completion_len) != cur_pos) {
last_completion_len = 0;
last_tab_pos = cur_pos;
direction = 0; /* new completion */
} else {
direction = (forward ? 1 : -1);
}
/* find completion */
completion = fn_completion(last_tab_pos, direction);
if (!completion) return;
/* make room for new completion */
completion_len = strlen(completion);
if (completion_len > last_completion_len)
while (max_pos + completion_len - last_completion_len + 1 > line_len)
extend_cur_line();
/* erase from last_tab_pos to eol */
while (cur_pos > last_tab_pos)
backspace();
while (cur_pos < max_pos) {
user_putc(SPACE);
if (isdoublewidth(cur_pos))
user_putc(SPACE);
cur_pos += char_seqlen();
}
/* rewind to last_tab_pos */
while (cur_pos > last_tab_pos)
backspace();
/* insert completion string */
if (max_pos > (last_tab_pos - last_completion_len))
memmove(cur_line + last_tab_pos + completion_len,
cur_line + last_tab_pos + last_completion_len,
max_pos - last_tab_pos - last_completion_len);
memcpy(cur_line + last_tab_pos, completion, completion_len);
max_pos += completion_len - last_completion_len;
cur_line[max_pos] = NUL;
/* draw new completion */
for (i = 0; i < completion_len; i++)
user_putc(cur_line[last_tab_pos+i]);
cur_pos += completion_len;
fix_line();
/* remember this completion */
last_tab_pos = cur_pos - completion_len;
last_completion_len = completion_len;
}
#endif /* HAVE_DIRENT_H || WIN32 */
char *
readline(const char *prompt)
{
int cur_char;
char *new_line;
/* start with a string of MAXBUF chars */
if (line_len != 0) {
free(cur_line);
line_len = 0;
}
cur_line = gp_alloc(MAXBUF, "readline");
line_len = MAXBUF;
/* set the termio so we can do our own input processing */
set_termio();
/* print the prompt */
fputs(prompt, stderr);
cur_line[0] = '\0';
cur_pos = 0;
max_pos = 0;
cur_entry = NULL;
/* get characters */
for (;;) {
cur_char = special_getc();
/* Accumulate ascii (7bit) printable characters
* and all leading 8bit characters.
*/
if ((isprint(cur_char)
|| (((cur_char & 0x80) != 0) && (cur_char != EOF)))
&& (cur_char != 0x09) /* TAB is a printable character in some locales */
) {
size_t i;
if (max_pos + 1 >= line_len) {
extend_cur_line();
}
for (i = max_pos; i > cur_pos; i--) {
cur_line[i] = cur_line[i - 1];
}
user_putc(cur_char);
cur_line[cur_pos] = cur_char;
cur_pos += 1;
max_pos += 1;
cur_line[max_pos] = '\0';
if (cur_pos < max_pos) {
switch (encoding) {
case S_ENC_UTF8:
if ((cur_char & 0xc0) == 0)
fix_line(); /* Normal ascii character */
else if ((cur_char & 0xc0) == 0xc0)
; /* start of a multibyte sequence. */
else if (((cur_char & 0xc0) == 0x80) &&
((unsigned char)(cur_line[cur_pos-2]) >= 0xe0))
; /* second byte of a >2 byte sequence */
else {
/* Last char of multi-byte sequence */
fix_line();
}
break;
default:
fix_line();
break;
}
}
/* else interpret unix terminal driver characters */
#ifdef VERASE
} else if (cur_char == term_chars[VERASE]) { /* ^H */
delete_backward();
#endif /* VERASE */
#ifdef VEOF
} else if (cur_char == term_chars[VEOF]) { /* ^D? */
if (max_pos == 0) {
reset_termio();
return ((char *) NULL);
}
delete_forward();
#endif /* VEOF */
#ifdef VKILL
} else if (cur_char == term_chars[VKILL]) { /* ^U? */
clear_line(prompt);
#endif /* VKILL */
#ifdef VWERASE
} else if (cur_char == term_chars[VWERASE]) { /* ^W? */
delete_previous_word();
#endif /* VWERASE */
#ifdef VREPRINT
} else if (cur_char == term_chars[VREPRINT]) { /* ^R? */
putc(NEWLINE, stderr); /* go to a fresh line */
redraw_line(prompt);
#endif /* VREPRINT */
#ifdef VSUSP
} else if (cur_char == term_chars[VSUSP]) {
reset_termio();
kill(0, SIGTSTP);
/* process stops here */
set_termio();
/* print the prompt */
redraw_line(prompt);
#endif /* VSUSP */
} else {
/* do normal editing commands */
/* some of these are also done above */
switch (cur_char) {
case EOF:
reset_termio();
return ((char *) NULL);
case 001: /* ^A */
while (cur_pos > 0)
backspace();
break;
case 002: /* ^B */
if (cur_pos > 0)
backspace();
break;
case 005: /* ^E */
while (cur_pos < max_pos) {
user_putc(cur_line[cur_pos]);
cur_pos += 1;
}
break;
case 006: /* ^F */
if (cur_pos < max_pos) {
step_forward();
}
break;
#if defined(HAVE_DIRENT_H) || defined(WIN32)
case 011: /* ^I / TAB */
tab_completion(TRUE); /* next tab completion */
break;
case 034: /* remapped by wtext.c or ansi_getc from Shift-Tab */
tab_completion(FALSE); /* previous tab completion */
break;
#endif
case 013: /* ^K */
clear_eoline(prompt);
max_pos = cur_pos;
break;
case 020: /* ^P */
if (history != NULL) {
if (cur_entry == NULL) {
cur_entry = history;
clear_line(prompt);
copy_line(cur_entry->line);
} else if (cur_entry->prev != NULL) {
cur_entry = cur_entry->prev;
clear_line(prompt);
copy_line(cur_entry->line);
}
}
break;
case 016: /* ^N */
if (cur_entry != NULL) {
cur_entry = cur_entry->next;
clear_line(prompt);
if (cur_entry != NULL)
copy_line(cur_entry->line);
else
cur_pos = max_pos = 0;
}
break;
case 014: /* ^L */
case 022: /* ^R */
putc(NEWLINE, stderr); /* go to a fresh line */
redraw_line(prompt);
break;
#ifndef DEL_ERASES_CURRENT_CHAR
case 0177: /* DEL */
case 023: /* Re-mapped from CSI~3 in ansi_getc() */
#endif
case 010: /* ^H */
delete_backward();
break;
case 004: /* ^D */
if (max_pos == 0) {
reset_termio();
return ((char *) NULL);
}
/* intentionally omitting break */
#ifdef DEL_ERASES_CURRENT_CHAR
case 0177: /* DEL */
case 023: /* Re-mapped from CSI~3 in ansi_getc() */
#endif
delete_forward();
break;
case 025: /* ^U */
clear_line(prompt);
break;
case 027: /* ^W */
delete_previous_word();
break;
case '\n': /* ^J */
case '\r': /* ^M */
cur_line[max_pos + 1] = '\0';
#ifdef OS2
while (cur_pos < max_pos) {
user_putc(cur_line[cur_pos]);
cur_pos += 1;
}
#endif
putc(NEWLINE, stderr);
/* Shrink the block down to fit the string ?
* if the alloc fails, we still own block at cur_line,
* but this shouldn't really fail.
*/
new_line = (char *) gp_realloc(cur_line, strlen(cur_line) + 1,
"line resize");
if (new_line)
cur_line = new_line;
/* else we just hang on to what we had - it's not a problem */
line_len = 0;
FPRINTF((stderr, "Resizing input line to %d chars\n", strlen(cur_line)));
reset_termio();
return (cur_line);
default:
break;
}
}
}
}
/* Fix up the line from cur_pos to max_pos.
* Does not need any terminal capabilities except backspace,
* and space overwrites a character
*/
static void
fix_line()
{
size_t i;
/* write tail of string */
for (i = cur_pos; i < max_pos; i++)
user_putc(cur_line[i]);
/* We may have just shortened the line by deleting a character.
* Write a space at the end to over-print the former last character.
* It needs 2 spaces in case the former character was double width.
*/
user_putc(SPACE);
user_putc(SPACE);
user_putc(BACKSPACE);
user_putc(BACKSPACE);
/* Back up to original position */
i = cur_pos;
for (cur_pos = max_pos; cur_pos > i; )
backspace();
}
/* redraw the entire line, putting the cursor where it belongs */
static void
redraw_line(const char *prompt)
{
size_t i;
fputs(prompt, stderr);
user_puts(cur_line);
/* put the cursor where it belongs */
i = cur_pos;
for (cur_pos = max_pos; cur_pos > i; )
backspace();
}
/* clear cur_line and the screen line */
static void
clear_line(const char *prompt)
{
putc('\r', stderr);
fputs(prompt, stderr);
cur_pos = 0;
while (cur_pos < max_pos) {
user_putc(SPACE);
if (isdoublewidth(cur_pos))
user_putc(SPACE);
cur_pos += char_seqlen();
}
while (max_pos > 0)
cur_line[--max_pos] = '\0';
putc('\r', stderr);
fputs(prompt, stderr);
cur_pos = 0;
}
/* clear to end of line and the screen end of line */
static void
clear_eoline(const char *prompt)
{
size_t save_pos = cur_pos;
while (cur_pos < max_pos) {
user_putc(SPACE);
if (isdoublewidth(cur_line[cur_pos]))
user_putc(SPACE);
cur_pos += char_seqlen();
}
cur_pos = save_pos;
while (max_pos > cur_pos)
cur_line[--max_pos] = '\0';
putc('\r', stderr);
fputs(prompt, stderr);
user_puts(cur_line);
}
/* delete the full or partial word immediately before cursor position */
static void
delete_previous_word()
{
size_t save_pos = cur_pos;
/* skip whitespace */
while ((cur_pos > 0) &&
(cur_line[cur_pos - 1] == SPACE)) {
backspace();
}
/* find start of previous word */
while ((cur_pos > 0) &&
(cur_line[cur_pos - 1] != SPACE)) {
backspace();
}
if (cur_pos != save_pos) {
size_t new_cur_pos = cur_pos;
size_t m = max_pos - save_pos;
/* erase to eol */
while (cur_pos < max_pos) {
user_putc(SPACE);
if (isdoublewidth(cur_pos))
user_putc(SPACE);
cur_pos += char_seqlen();
}
while (cur_pos > new_cur_pos)
backspace();
/* overwrite previous word with trailing characters */
memmove(cur_line + cur_pos, cur_line + save_pos, m);
/* overwrite characters at end of string with NULs */
memset(cur_line + cur_pos + m, NUL, save_pos - cur_pos);
/* update display and line length */
max_pos = cur_pos + m;
fix_line();
}
}
/* copy line to cur_line, draw it and set cur_pos and max_pos */
static void
copy_line(char *line)
{
while (strlen(line) + 1 > line_len) {
extend_cur_line();
}
strcpy(cur_line, line);
user_puts(cur_line);
cur_pos = max_pos = strlen(cur_line);
}
#if !defined(MSDOS) && !defined(_Windows)
/* Convert ANSI arrow keys to control characters */
static int
ansi_getc()
{
int c;
#ifdef USE_MOUSE
if (term && term->waitforinput && interactive)
c = term->waitforinput();
else
#endif
c = getc(stdin);
if (c == 033) {
c = getc(stdin); /* check for CSI */
if (c == '[') {
c = getc(stdin); /* get command character */
switch (c) {
case 'D': /* left arrow key */
c = 002;
break;
case 'C': /* right arrow key */
c = 006;
break;
case 'A': /* up arrow key */
c = 020;
break;
case 'B': /* down arrow key */
c = 016;
break;
case 'F': /* end key */
c = 005;
break;
case 'H': /* home key */
c = 001;
break;
case 'Z': /* shift-tab key */
c = 034; /* FS: non-standard! */
break;
case '3': /* DEL can be <esc>[3~ */
getc(stdin); /* eat the ~ */
c = 023; /* DC3 ^S NB: non-standard!! */
}
}
}
return c;
}
#endif
#if defined(MSDOS) || defined(_Windows) || defined(OS2)
#ifdef WGP_CONSOLE
static char
win_getch()
{
if (term && term->waitforinput)
return term->waitforinput();
else
return ConsoleGetch();
}
#endif
/* Convert Arrow keystrokes to Control characters: */
static char
msdos_getch()
{
char c;
#ifdef DJGPP
int ch = getkey();
c = (ch & 0xff00) ? 0 : ch & 0xff;
#elif defined (OS2)
c = getc(stdin);
#else /* not OS2, not DJGPP*/
# if defined (_Windows) && defined (USE_MOUSE)
if (term && term->waitforinput && interactive)
c = term->waitforinput();
else
# endif /* not _Windows && not USE_MOUSE */
c = getch();
#endif /* not DJGPP, not OS2 */
if (c == 0) {
#ifdef DJGPP
c = ch & 0xff;
#else /* not DJGPP */
# ifdef OS2
c = getc(stdin);
# else /* not OS2 */
c = getch(); /* Get the extended code. */
# endif /* OS2 */
#endif /* not DJGPP */
switch (c) {
case 75: /* Left Arrow. */
c = 002;
break;
case 77: /* Right Arrow. */
c = 006;
break;
case 72: /* Up Arrow. */
c = 020;
break;
case 80: /* Down Arrow. */
c = 016;
break;
case 115: /* Ctl Left Arrow. */
case 71: /* Home */
c = 001;
break;
case 116: /* Ctl Right Arrow. */
case 79: /* End */
c = 005;
break;
case 83: /* Delete */
c = 0177;
break;
default:
c = 0;
break;
}
} else if (c == 033) { /* ESC */
c = 025;
}
return c;
}
#endif /* MSDOS || _Windows || OS2 */
#ifdef OS2
/* We need to call different procedures, dependent on the
session type: VIO/window or an (XFree86) xterm */
static char
os2_getch() {
static int IsXterm = 0;
static int init = 0;
if (!init) {
if (getenv("WINDOWID")) {
IsXterm = 1;
}
init = 1;
}
if (IsXterm) {
return ansi_getc();
} else {
return msdos_getch();
}
}
#endif /* OS2 */
/* set termio so we can do our own input processing */
static void
set_termio()
{
#if !defined(MSDOS) && !defined(_Windows)
/* set termio so we can do our own input processing */
/* and save the old terminal modes so we can reset them later */
if (term_set == 0) {
/*
* Get terminal modes.
*/
# ifdef SGTTY
ioctl(0, TIOCGETP, &orig_termio);
# else /* not SGTTY */
# ifdef TERMIOS
# ifdef TCGETS
ioctl(0, TCGETS, &orig_termio);
# else /* not TCGETS */
tcgetattr(0, &orig_termio);
# endif /* not TCGETS */
# else /* not TERMIOS */
ioctl(0, TCGETA, &orig_termio);
# endif /* TERMIOS */
# endif /* not SGTTY */
/*
* Save terminal modes
*/
rl_termio = orig_termio;
/*
* Set the modes to the way we want them
* and save our input special characters
*/
# ifdef SGTTY
rl_termio.sg_flags |= CBREAK;
rl_termio.sg_flags &= ~(ECHO | XTABS);
ioctl(0, TIOCSETN, &rl_termio);
ioctl(0, TIOCGETC, &s_tchars);
term_chars[VERASE] = orig_termio.sg_erase;
term_chars[VEOF] = s_tchars.t_eofc;
term_chars[VKILL] = orig_termio.sg_kill;
# ifdef TIOCGLTC
ioctl(0, TIOCGLTC, &s_ltchars);
term_chars[VWERASE] = s_ltchars.t_werasc;
term_chars[VREPRINT] = s_ltchars.t_rprntc;
term_chars[VSUSP] = s_ltchars.t_suspc;
/* disable suspending process on ^Z */
s_ltchars.t_suspc = 0;
ioctl(0, TIOCSLTC, &s_ltchars);
# endif /* TIOCGLTC */
# else /* not SGTTY */
rl_termio.c_iflag &= ~(BRKINT | PARMRK | INPCK | IUCLC | IXON | IXOFF);
rl_termio.c_iflag |= (IGNBRK | IGNPAR);
/* rl_termio.c_oflag &= ~(ONOCR); Costas Sphocleous Irvine,CA */
rl_termio.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | NOFLSH);
# ifdef OS2
/* for emx: remove default terminal processing */
rl_termio.c_lflag &= ~(IDEFAULT);
# endif /* OS2 */
rl_termio.c_lflag |= (ISIG);
rl_termio.c_cc[VMIN] = 1;
rl_termio.c_cc[VTIME] = 0;
# ifndef VWERASE
# define VWERASE 3
# endif /* VWERASE */
term_chars[VERASE] = orig_termio.c_cc[VERASE];
term_chars[VEOF] = orig_termio.c_cc[VEOF];
term_chars[VKILL] = orig_termio.c_cc[VKILL];
# ifdef TERMIOS
term_chars[VWERASE] = orig_termio.c_cc[VWERASE];
# ifdef VREPRINT
term_chars[VREPRINT] = orig_termio.c_cc[VREPRINT];
# else /* not VREPRINT */
# ifdef VRPRNT
term_chars[VRPRNT] = orig_termio.c_cc[VRPRNT];
# endif /* VRPRNT */
# endif /* not VREPRINT */
term_chars[VSUSP] = orig_termio.c_cc[VSUSP];
/* disable suspending process on ^Z */
rl_termio.c_cc[VSUSP] = 0;
# endif /* TERMIOS */
# endif /* not SGTTY */
/*
* Set the new terminal modes.
*/
# ifdef SGTTY
ioctl(0, TIOCSLTC, &s_ltchars);
# else /* not SGTTY */
# ifdef TERMIOS
# ifdef TCSETSW
ioctl(0, TCSETSW, &rl_termio);
# else /* not TCSETSW */
tcsetattr(0, TCSADRAIN, &rl_termio);
# endif /* not TCSETSW */
# else /* not TERMIOS */
ioctl(0, TCSETAW, &rl_termio);
# endif /* not TERMIOS */
# endif /* not SGTTY */
term_set = 1;
}
#endif /* not MSDOS && not _Windows */
}
static void
reset_termio()
{
#if !defined(MSDOS) && !defined(_Windows)
/* reset saved terminal modes */
if (term_set == 1) {
# ifdef SGTTY
ioctl(0, TIOCSETN, &orig_termio);
# ifdef TIOCGLTC
/* enable suspending process on ^Z */
s_ltchars.t_suspc = term_chars[VSUSP];
ioctl(0, TIOCSLTC, &s_ltchars);
# endif /* TIOCGLTC */
# else /* not SGTTY */
# ifdef TERMIOS
# ifdef TCSETSW
ioctl(0, TCSETSW, &orig_termio);
# else /* not TCSETSW */
tcsetattr(0, TCSADRAIN, &orig_termio);
# endif /* not TCSETSW */
# else /* not TERMIOS */
ioctl(0, TCSETAW, &orig_termio);
# endif /* TERMIOS */
# endif /* not SGTTY */
term_set = 0;
}
#endif /* not MSDOS && not _Windows */
}
#endif /* READLINE && !(HAVE_LIBREADLINE || HAVE_LIBEDITLINE) */
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