/* $OpenBSD: edit.c,v 1.41 2015/09/01 13:12:31 tedu Exp $ */
/* $OpenBSD: edit.h,v 1.9 2011/05/30 17:14:35 martynas Exp $ */
/* $OpenBSD: emacs.c,v 1.52 2015/09/10 22:48:58 nicm Exp $ */
/* $OpenBSD: vi.c,v 1.30 2015/09/10 22:48:58 nicm Exp $ */
/*-
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
* 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
* mirabilos <m@mirbsd.org>
*
* Provided that these terms and disclaimer and all copyright notices
* are retained or reproduced in an accompanying document, permission
* is granted to deal in this work without restriction, including un-
* limited rights to use, publicly perform, distribute, sell, modify,
* merge, give away, or sublicence.
*
* This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
* the utmost extent permitted by applicable law, neither express nor
* implied; without malicious intent or gross negligence. In no event
* may a licensor, author or contributor be held liable for indirect,
* direct, other damage, loss, or other issues arising in any way out
* of dealing in the work, even if advised of the possibility of such
* damage or existence of a defect, except proven that it results out
* of said person's immediate fault when using the work as intended.
*/
#include "sh.h"
#ifndef MKSH_NO_CMDLINE_EDITING
__RCSID("$MirOS: src/bin/mksh/edit.c,v 1.342 2018/01/14 00:03:00 tg Exp $");
/*
* in later versions we might use libtermcap for this, but since external
* dependencies are problematic, this has not yet been decided on; another
* good string is KSH_ESC_STRING "c" except on hardware terminals like the
* DEC VT420 which do a full power cycle then...
*/
#ifndef MKSH_CLS_STRING
#define MKSH_CLS_STRING KSH_ESC_STRING "[;H" KSH_ESC_STRING "[J"
#endif
/* tty driver characters we are interested in */
#define EDCHAR_DISABLED 0xFFFFU
#define EDCHAR_INITIAL 0xFFFEU
static struct {
unsigned short erase;
unsigned short kill;
unsigned short werase;
unsigned short intr;
unsigned short quit;
unsigned short eof;
} edchars;
#define isched(x,e) ((unsigned short)(unsigned char)(x) == (e))
#define isedchar(x) (!((x) & ~0xFF))
#ifndef _POSIX_VDISABLE
#define toedchar(x) ((unsigned short)(unsigned char)(x))
#else
#define toedchar(x) (((_POSIX_VDISABLE != -1) && ((x) == _POSIX_VDISABLE)) ? \
((unsigned short)EDCHAR_DISABLED) : \
((unsigned short)(unsigned char)(x)))
#endif
/* x_cf_glob() flags */
#define XCF_COMMAND BIT(0) /* Do command completion */
#define XCF_FILE BIT(1) /* Do file completion */
#define XCF_FULLPATH BIT(2) /* command completion: store full path */
#define XCF_COMMAND_FILE (XCF_COMMAND | XCF_FILE)
#define XCF_IS_COMMAND BIT(3) /* return flag: is command */
#define XCF_IS_NOSPACE BIT(4) /* return flag: do not append a space */
static char editmode;
static int xx_cols; /* for Emacs mode */
static int modified; /* buffer has been "modified" */
static char *holdbufp; /* place to hold last edit buffer */
/* 0=dumb 1=tmux (for now) */
static uint8_t x_term_mode;
static void x_adjust(void);
static int x_getc(void);
static void x_putcf(int);
static void x_modified(void);
static void x_mode(bool);
static int x_do_comment(char *, ssize_t, ssize_t *);
static void x_print_expansions(int, char * const *, bool);
static int x_cf_glob(int *, const char *, int, int, int *, int *, char ***);
static size_t x_longest_prefix(int, char * const *);
static void x_glob_hlp_add_qchar(char *);
static char *x_glob_hlp_tilde_and_rem_qchar(char *, bool);
static size_t x_basename(const char *, const char *);
static void x_free_words(int, char **);
static int x_escape(const char *, size_t, int (*)(const char *, size_t));
static int x_emacs(char *);
static void x_init_prompt(bool);
#if !MKSH_S_NOVI
static int x_vi(char *);
#endif
static void x_intr(int, int) MKSH_A_NORETURN;
#define x_flush() shf_flush(shl_out)
#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
#define x_putc(c) x_putcf(c)
#else
#define x_putc(c) shf_putc((c), shl_out)
#endif
static int path_order_cmp(const void *, const void *);
static void glob_table(const char *, XPtrV *, struct table *);
static void glob_path(int, const char *, XPtrV *, const char *);
static int x_file_glob(int *, char *, char ***);
static int x_command_glob(int, char *, char ***);
static int x_locate_word(const char *, int, int, int *, bool *);
static int x_e_getmbc(char *);
/* +++ generic editing functions +++ */
/*
* read an edited command line
*/
int
x_read(char *buf)
{
int i;
x_mode(true);
modified = 1;
if (Flag(FEMACS) || Flag(FGMACS))
i = x_emacs(buf);
#if !MKSH_S_NOVI
else if (Flag(FVI))
i = x_vi(buf);
#endif
else
/* internal error */
i = -1;
editmode = 0;
x_mode(false);
return (i);
}
/* tty I/O */
static int
x_getc(void)
{
#ifdef __OS2__
return (_read_kbd(0, 1, 0));
#else
char c;
ssize_t n;
while ((n = blocking_read(STDIN_FILENO, &c, 1)) < 0 && errno == EINTR)
if (trap) {
x_mode(false);
runtraps(0);
#ifdef SIGWINCH
if (got_winch) {
change_winsz();
if (x_cols != xx_cols && editmode == 1) {
/* redraw line in Emacs mode */
xx_cols = x_cols;
x_init_prompt(false);
x_adjust();
}
}
#endif
x_mode(true);
}
return ((n == 1) ? (int)(unsigned char)c : -1);
#endif
}
static void
x_putcf(int c)
{
shf_putc(c, shl_out);
}
/*********************************
* Misc common code for vi/emacs *
*********************************/
/*-
* Handle the commenting/uncommenting of a line.
* Returns:
* 1 if a carriage return is indicated (comment added)
* 0 if no return (comment removed)
* -1 if there is an error (not enough room for comment chars)
* If successful, *lenp contains the new length. Note: cursor should be
* moved to the start of the line after (un)commenting.
*/
static int
x_do_comment(char *buf, ssize_t bsize, ssize_t *lenp)
{
ssize_t i, j, len = *lenp;
if (len == 0)
/* somewhat arbitrary - it's what AT&T ksh does */
return (1);
/* Already commented? */
if (buf[0] == '#') {
bool saw_nl = false;
for (j = 0, i = 1; i < len; i++) {
if (!saw_nl || buf[i] != '#')
buf[j++] = buf[i];
saw_nl = buf[i] == '\n';
}
*lenp = j;
return (0);
} else {
int n = 1;
/* See if there's room for the #s - 1 per \n */
for (i = 0; i < len; i++)
if (buf[i] == '\n')
n++;
if (len + n >= bsize)
return (-1);
/* Now add them... */
for (i = len, j = len + n; --i >= 0; ) {
if (buf[i] == '\n')
buf[--j] = '#';
buf[--j] = buf[i];
}
buf[0] = '#';
*lenp += n;
return (1);
}
}
/****************************************************
* Common file/command completion code for vi/emacs *
****************************************************/
static void
x_print_expansions(int nwords, char * const *words, bool is_command)
{
bool use_copy = false;
size_t prefix_len;
XPtrV l = { NULL, 0, 0 };
struct columnise_opts co;
/*
* Check if all matches are in the same directory (in this
* case, we want to omit the directory name)
*/
if (!is_command &&
(prefix_len = x_longest_prefix(nwords, words)) > 0) {
int i;
/* Special case for 1 match (prefix is whole word) */
if (nwords == 1)
prefix_len = x_basename(words[0], NULL);
/* Any (non-trailing) slashes in non-common word suffixes? */
for (i = 0; i < nwords; i++)
if (x_basename(words[i] + prefix_len, NULL) >
prefix_len)
break;
/* All in same directory? */
if (i == nwords) {
while (prefix_len > 0 &&
!mksh_cdirsep(words[0][prefix_len - 1]))
prefix_len--;
use_copy = true;
XPinit(l, nwords + 1);
for (i = 0; i < nwords; i++)
XPput(l, words[i] + prefix_len);
XPput(l, NULL);
}
}
/*
* Enumerate expansions
*/
x_putc('\r');
x_putc('\n');
co.shf = shl_out;
co.linesep = '\n';
co.do_last = true;
co.prefcol = false;
pr_list(&co, use_copy ? (char **)XPptrv(l) : words);
if (use_copy)
/* not x_free_words() */
XPfree(l);
}
/*
* Convert backslash-escaped string to QCHAR-escaped
* string useful for globbing; loses QCHAR unless it
* can squeeze in, eg. by previous loss of backslash
*/
static void
x_glob_hlp_add_qchar(char *cp)
{
char ch, *dp = cp;
bool escaping = false;
while ((ch = *cp++)) {
if (ch == '\\' && !escaping) {
escaping = true;
continue;
}
if (escaping || (ch == QCHAR && (cp - dp) > 1)) {
/*
* empirically made list of chars to escape
* for globbing as well as QCHAR itself
*/
switch (ord(ch)) {
case QCHAR:
case ORD('$'):
case ORD('*'):
case ORD('?'):
case ORD('['):
case ORD('\\'):
case ORD('`'):
*dp++ = QCHAR;
break;
}
escaping = false;
}
*dp++ = ch;
}
*dp = '\0';
}
/*
* Run tilde expansion on argument string, return the result
* after unescaping; if the flag is set, the original string
* is freed if changed and assumed backslash-escaped, if not
* it is assumed QCHAR-escaped
*/
static char *
x_glob_hlp_tilde_and_rem_qchar(char *s, bool magic_flag)
{
char ch, *cp, *dp;
/*
* On the string, check whether we have a tilde expansion,
* and if so, discern "~foo/bar" and "~/baz" from "~blah";
* if we have a directory part (the former), try to expand
*/
if (*s == '~' && (cp = /* not sdirsep */ strchr(s, '/')) != NULL) {
/* ok, so split into "~foo"/"bar" or "~"/"baz" */
*cp++ = 0;
/* try to expand the tilde */
if (!(dp = do_tilde(s + 1))) {
/* nope, revert damage */
*--cp = '/';
} else {
/* ok, expand and replace */
cp = shf_smprintf(Tf_sSs, dp, cp);
if (magic_flag)
afree(s, ATEMP);
s = cp;
}
}
/* ... convert it from backslash-escaped via QCHAR-escaped... */
if (magic_flag)
x_glob_hlp_add_qchar(s);
/* ... to unescaped, for comparison with the matches */
cp = dp = s;
while ((ch = *cp++)) {
if (ch == QCHAR && !(ch = *cp++))
break;
*dp++ = ch;
}
*dp = '\0';
return (s);
}
/**
* Do file globbing:
* - does expansion, checks for no match, etc.
* - sets *wordsp to array of matching strings
* - returns number of matching strings
*/
static int
x_file_glob(int *flagsp, char *toglob, char ***wordsp)
{
char **words, *cp;
int nwords;
XPtrV w;
struct source *s, *sold;
/* remove all escaping backward slashes */
x_glob_hlp_add_qchar(toglob);
/*
* Convert "foo*" (toglob) to an array of strings (words)
*/
sold = source;
s = pushs(SWSTR, ATEMP);
s->start = s->str = toglob;
source = s;
if (yylex(ONEWORD | LQCHAR) != LWORD) {
source = sold;
internal_warningf(Tfg_badsubst);
return (0);
}
source = sold;
afree(s, ATEMP);
XPinit(w, 32);
cp = yylval.cp;
while (*cp == CHAR || *cp == QCHAR)
cp += 2;
nwords = DOGLOB | DOTILDE | DOMARKDIRS;
if (*cp != EOS) {
/* probably a $FOO expansion */
*flagsp |= XCF_IS_NOSPACE;
/* this always results in at most one match */
nwords = 0;
}
expand(yylval.cp, &w, nwords);
XPput(w, NULL);
words = (char **)XPclose(w);
for (nwords = 0; words[nwords]; nwords++)
;
if (nwords == 1) {
struct stat statb;
/* Expand any tilde and drop all QCHAR for comparison */
toglob = x_glob_hlp_tilde_and_rem_qchar(toglob, false);
/*
* Check if globbing failed (returned glob pattern),
* but be careful (e.g. toglob == "ab*" when the file
* "ab*" exists is not an error).
* Also, check for empty result - happens if we tried
* to glob something which evaluated to an empty
* string (e.g., "$FOO" when there is no FOO, etc).
*/
if ((strcmp(words[0], toglob) == 0 &&
stat(words[0], &statb) < 0) ||
words[0][0] == '\0') {
x_free_words(nwords, words);
words = NULL;
nwords = 0;
}
}
if ((*wordsp = nwords ? words : NULL) == NULL && words != NULL)
x_free_words(nwords, words);
return (nwords);
}
/* Data structure used in x_command_glob() */
struct path_order_info {
char *word;
size_t base;
size_t path_order;
};
/* Compare routine used in x_command_glob() */
static int
path_order_cmp(const void *aa, const void *bb)
{
const struct path_order_info *a = (const struct path_order_info *)aa;
const struct path_order_info *b = (const struct path_order_info *)bb;
int t;
if ((t = ascstrcmp(a->word + a->base, b->word + b->base)))
return (t);
if (a->path_order > b->path_order)
return (1);
if (a->path_order < b->path_order)
return (-1);
return (0);
}
static int
x_command_glob(int flags, char *toglob, char ***wordsp)
{
char *pat, *fpath;
size_t nwords;
XPtrV w;
struct block *l;
/* Convert "foo*" (toglob) to a pattern for future use */
pat = evalstr(toglob, DOPAT | DOTILDE);
XPinit(w, 32);
glob_table(pat, &w, &keywords);
glob_table(pat, &w, &aliases);
glob_table(pat, &w, &builtins);
for (l = e->loc; l; l = l->next)
glob_table(pat, &w, &l->funs);
glob_path(flags, pat, &w, path);
if ((fpath = str_val(global(TFPATH))) != null)
glob_path(flags, pat, &w, fpath);
nwords = XPsize(w);
if (!nwords) {
*wordsp = NULL;
XPfree(w);
return (0);
}
/* Sort entries */
if (flags & XCF_FULLPATH) {
/* Sort by basename, then path order */
struct path_order_info *info, *last_info = NULL;
char **words = (char **)XPptrv(w);
size_t i, path_order = 0;
info = (struct path_order_info *)
alloc2(nwords, sizeof(struct path_order_info), ATEMP);
for (i = 0; i < nwords; i++) {
info[i].word = words[i];
info[i].base = x_basename(words[i], NULL);
if (!last_info || info[i].base != last_info->base ||
strncmp(words[i], last_info->word, info[i].base) != 0) {
last_info = &info[i];
path_order++;
}
info[i].path_order = path_order;
}
qsort(info, nwords, sizeof(struct path_order_info),
path_order_cmp);
for (i = 0; i < nwords; i++)
words[i] = info[i].word;
afree(info, ATEMP);
} else {
/* Sort and remove duplicate entries */
char **words = (char **)XPptrv(w);
size_t i, j;
qsort(words, nwords, sizeof(void *), ascpstrcmp);
for (i = j = 0; i < nwords - 1; i++) {
if (strcmp(words[i], words[i + 1]))
words[j++] = words[i];
else
afree(words[i], ATEMP);
}
words[j++] = words[i];
w.len = nwords = j;
}
XPput(w, NULL);
*wordsp = (char **)XPclose(w);
return (nwords);
}
#define IS_WORDC(c) (!ctype(c, C_EDNWC))
static int
x_locate_word(const char *buf, int buflen, int pos, int *startp,
bool *is_commandp)
{
int start, end;
/* Bad call? Probably should report error */
if (pos < 0 || pos > buflen) {
*startp = pos;
*is_commandp = false;
return (0);
}
/* The case where pos == buflen happens to take care of itself... */
start = pos;
/*
* Keep going backwards to start of word (has effect of allowing
* one blank after the end of a word)
*/
for (; (start > 0 && IS_WORDC(buf[start - 1])) ||
(start > 1 && buf[start - 2] == '\\'); start--)
;
/* Go forwards to end of word */
for (end = start; end < buflen && IS_WORDC(buf[end]); end++) {
if (buf[end] == '\\' && (end + 1) < buflen)
end++;
}
if (is_commandp) {
bool iscmd;
int p = start - 1;
/* Figure out if this is a command */
while (p >= 0 && ctype(buf[p], C_SPACE))
p--;
iscmd = p < 0 || ctype(buf[p], C_EDCMD);
if (iscmd) {
/*
* If command has a /, path, etc. is not searched;
* only current directory is searched which is just
* like file globbing.
*/
for (p = start; p < end; p++)
if (mksh_cdirsep(buf[p]))
break;
iscmd = p == end;
}
*is_commandp = iscmd;
}
*startp = start;
return (end - start);
}
static int
x_cf_glob(int *flagsp, const char *buf, int buflen, int pos, int *startp,
int *endp, char ***wordsp)
{
int len, nwords = 0;
char **words = NULL;
bool is_command;
len = x_locate_word(buf, buflen, pos, startp, &is_command);
if (!((*flagsp) & XCF_COMMAND))
is_command = false;
/*
* Don't do command globing on zero length strings - it takes too
* long and isn't very useful. File globs are more likely to be
* useful, so allow these.
*/
if (len == 0 && is_command)
return (0);
if (len >= 0) {
char *toglob, *s;
/*
* Given a string, copy it and possibly add a '*' to the end.
*/
strndupx(toglob, buf + *startp, len + /* the '*' */ 1, ATEMP);
toglob[len] = '\0';
/*
* If the pathname contains a wildcard (an unquoted '*',
* '?', or '[') or an extglob, then it is globbed based
* on that value (i.e., without the appended '*'). Same
* for parameter substitutions (as in “cat $HOME/.ss↹”)
* without appending a trailing space (LP: #710539), as
* well as for “~foo” (but not “~foo/”).
*/
for (s = toglob; *s; s++) {
if (*s == '\\' && s[1])
s++;
else if (ctype(*s, C_QUEST | C_DOLAR) ||
ord(*s) == ORD('*') || ord(*s) == ORD('[') ||
/* ?() *() +() @() !() but two already checked */
(ord(s[1]) == ORD('(' /*)*/) &&
(ord(*s) == ORD('+') || ord(*s) == ORD('@') ||
ord(*s) == ORD('!')))) {
/*
* just expand based on the extglob
* or parameter
*/
goto dont_add_glob;
}
}
if (*toglob == '~' && /* not vdirsep */ !vstrchr(toglob, '/')) {
/* neither for '~foo' (but '~foo/bar') */
*flagsp |= XCF_IS_NOSPACE;
goto dont_add_glob;
}
/* append a glob */
toglob[len] = '*';
toglob[len + 1] = '\0';
dont_add_glob:
/*
* Expand (glob) it now.
*/
nwords = is_command ?
x_command_glob(*flagsp, toglob, &words) :
x_file_glob(flagsp, toglob, &words);
afree(toglob, ATEMP);
}
if (nwords == 0) {
*wordsp = NULL;
return (0);
}
if (is_command)
*flagsp |= XCF_IS_COMMAND;
*wordsp = words;
*endp = *startp + len;
return (nwords);
}
/*
* Find longest common prefix
*/
static size_t
x_longest_prefix(int nwords, char * const * words)
{
int i;
size_t j, prefix_len;
char *p;
if (nwords <= 0)
return (0);
prefix_len = strlen(words[0]);
for (i = 1; i < nwords; i++)
for (j = 0, p = words[i]; j < prefix_len; j++)
if (p[j] != words[0][j]) {
prefix_len = j;
break;
}
/* false for nwords==1 as 0 = words[0][prefix_len] then */
if (UTFMODE && prefix_len && (rtt2asc(words[0][prefix_len]) & 0xC0) == 0x80)
while (prefix_len && (rtt2asc(words[0][prefix_len]) & 0xC0) != 0xC0)
--prefix_len;
return (prefix_len);
}
static void
x_free_words(int nwords, char **words)
{
while (nwords)
afree(words[--nwords], ATEMP);
afree(words, ATEMP);
}
/*-
* Return the offset of the basename of string s (which ends at se - need not
* be null terminated). Trailing slashes are ignored. If s is just a slash,
* then the offset is 0 (actually, length - 1).
* s Return
* /etc 1
* /etc/ 1
* /etc// 1
* /etc/fo 5
* foo 0
* /// 2
* 0
*/
static size_t
x_basename(const char *s, const char *se)
{
const char *p;
if (se == NULL)
se = strnul(s);
if (s == se)
return (0);
/* skip trailing directory separators */
p = se - 1;
while (p > s && mksh_cdirsep(*p))
--p;
/* drop last component */
while (p > s && !mksh_cdirsep(*p))
--p;
if (mksh_cdirsep(*p) && p + 1 < se)
++p;
return (p - s);
}
/*
* Apply pattern matching to a table: all table entries that match a pattern
* are added to wp.
*/
static void
glob_table(const char *pat, XPtrV *wp, struct table *tp)
{
struct tstate ts;
struct tbl *te;
ktwalk(&ts, tp);
while ((te = ktnext(&ts)))
if (gmatchx(te->name, pat, false)) {
char *cp;
strdupx(cp, te->name, ATEMP);
XPput(*wp, cp);
}
}
static void
glob_path(int flags, const char *pat, XPtrV *wp, const char *lpath)
{
const char *sp = lpath, *p;
char *xp, **words;
size_t pathlen, patlen, oldsize, newsize, i, j;
XString xs;
patlen = strlen(pat);
checkoktoadd(patlen, 129 + X_EXTRA);
++patlen;
Xinit(xs, xp, patlen + 128, ATEMP);
while (sp) {
xp = Xstring(xs, xp);
if (!(p = cstrchr(sp, MKSH_PATHSEPC)))
p = strnul(sp);
pathlen = p - sp;
if (pathlen) {
/*
* Copy sp into xp, stuffing any MAGIC characters
* on the way
*/
const char *s = sp;
XcheckN(xs, xp, pathlen * 2);
while (s < p) {
if (ISMAGIC(*s))
*xp++ = MAGIC;
*xp++ = *s++;
}
*xp++ = '/';
pathlen++;
}
sp = p;
XcheckN(xs, xp, patlen);
memcpy(xp, pat, patlen);
oldsize = XPsize(*wp);
/* mark dirs */
glob_str(Xstring(xs, xp), wp, true);
newsize = XPsize(*wp);
/* Check that each match is executable... */
words = (char **)XPptrv(*wp);
for (i = j = oldsize; i < newsize; i++) {
if (ksh_access(words[i], X_OK) == 0) {
words[j] = words[i];
if (!(flags & XCF_FULLPATH))
memmove(words[j], words[j] + pathlen,
strlen(words[j] + pathlen) + 1);
j++;
} else
afree(words[i], ATEMP);
}
wp->len = j;
if (!*sp++)
break;
}
Xfree(xs, xp);
}
/*
* if argument string contains any special characters, they will
* be escaped and the result will be put into edit buffer by
* keybinding-specific function
*/
static int
x_escape(const char *s, size_t len, int (*putbuf_func)(const char *, size_t))
{
size_t add = 0, wlen = len;
int rval = 0;
while (wlen - add > 0)
if (ctype(s[add], C_IFS | C_EDQ)) {
if (putbuf_func(s, add) != 0) {
rval = -1;
break;
}
putbuf_func(s[add] == '\n' ? "'" : "\\", 1);
putbuf_func(&s[add], 1);
if (s[add] == '\n')
putbuf_func("'", 1);
add++;
wlen -= add;
s += add;
add = 0;
} else
++add;
if (wlen > 0 && rval == 0)
rval = putbuf_func(s, wlen);
return (rval);
}
/* +++ emacs editing mode +++ */
static Area aedit;
#define AEDIT &aedit /* area for kill ring and macro defns */
/* values returned by keyboard functions */
#define KSTD 0
#define KEOL 1 /* ^M, ^J */
#define KINTR 2 /* ^G, ^C */
struct x_ftab {
int (*xf_func)(int c);
const char *xf_name;
short xf_flags;
};
struct x_defbindings {
unsigned char xdb_func; /* XFUNC_* */
unsigned char xdb_tab;
unsigned char xdb_char;
};
#define XF_ARG 1 /* command takes number prefix */
#define XF_NOBIND 2 /* not allowed to bind to function */
#define XF_PREFIX 4 /* function sets prefix */
#define X_NTABS 4 /* normal, meta1, meta2, pc */
#define X_TABSZ 256 /* size of keydef tables etc */
/*-
* Arguments for do_complete()
* 0 = enumerate M-= complete as much as possible and then list
* 1 = complete M-Esc
* 2 = list M-?
*/
typedef enum {
CT_LIST, /* list the possible completions */
CT_COMPLETE, /* complete to longest prefix */
CT_COMPLIST /* complete and then list (if non-exact) */
} Comp_type;
/*
* The following are used for my horizontal scrolling stuff
*/
static char *xbuf; /* beg input buffer */
static char *xend; /* end input buffer */
static char *xcp; /* current position */
static char *xep; /* current end */
static char *xbp; /* start of visible portion of input buffer */
static char *xlp; /* last char visible on screen */
static bool x_adj_ok;
/*
* we use x_adj_done so that functions can tell
* whether x_adjust() has been called while they are active.
*/
static int x_adj_done; /* is incremented by x_adjust() */
static int x_displen;
static int x_arg; /* general purpose arg */
static bool x_arg_defaulted; /* x_arg not explicitly set; defaulted to 1 */
static bool xlp_valid; /* lastvis pointer was recalculated */
static char **x_histp; /* history position */
static int x_nextcmd; /* for newline-and-next */
static char **x_histncp; /* saved x_histp for " */
static char **x_histmcp; /* saved x_histp for " */
static char *xmp; /* mark pointer */
static unsigned char x_last_command;
static unsigned char (*x_tab)[X_TABSZ]; /* key definition */
#ifndef MKSH_SMALL
static char *(*x_atab)[X_TABSZ]; /* macro definitions */
#endif
static unsigned char x_bound[(X_TABSZ * X_NTABS + 7) / 8];
#define KILLSIZE 20
static char *killstack[KILLSIZE];
static int killsp, killtp;
static int x_curprefix;
#ifndef MKSH_SMALL
static char *macroptr; /* bind key macro active? */
#endif
#if !MKSH_S_NOVI
static int winwidth; /* width of window */
static char *wbuf[2]; /* window buffers */
static int wbuf_len; /* length of window buffers (x_cols - 3) */
static int win; /* window buffer in use */
static char morec; /* more character at right of window */
static int lastref; /* argument to last refresh() */
static int holdlen; /* length of holdbuf */
#endif
static int pwidth; /* width of prompt */
static int prompt_trunc; /* how much of prompt to truncate or -1 */
static int x_col; /* current column on line */
static int x_ins(const char *);
static void x_delete(size_t, bool);
static size_t x_bword(void);
static size_t x_fword(bool);
static void x_goto(char *);
static char *x_bs0(char *, char *) MKSH_A_PURE;
static void x_bs3(char **);
static int x_size2(char *, char **);
static void x_zots(char *);
static void x_zotc3(char **);
static void x_vi_zotc(int);
static void x_load_hist(char **);
static int x_search(char *, int, int);
#ifndef MKSH_SMALL
static int x_search_dir(int);
#endif
static int x_match(char *, char *);
static void x_redraw(int);
static void x_push(size_t);
static char *x_mapin(const char *, Area *);
static char *x_mapout(int);
static void x_mapout2(int, char **);
static void x_print(int, int);
static void x_e_ungetc(int);
static int x_e_getc(void);
static void x_e_putc2(int);
static void x_e_putc3(const char **);
static void x_e_puts(const char *);
#ifndef MKSH_SMALL
static int x_fold_case(int);
#endif
static char *x_lastcp(void);
static void x_lastpos(void);
static void do_complete(int, Comp_type);
static size_t x_nb2nc(size_t) MKSH_A_PURE;
static int unget_char = -1;
static int x_do_ins(const char *, size_t);
static void bind_if_not_bound(int, int, int);
enum emacs_funcs {
#define EMACSFN_ENUMS
#include "emacsfn.h"
XFUNC_MAX
};
#define EMACSFN_DEFNS
#include "emacsfn.h"
static const struct x_ftab x_ftab[] = {
#define EMACSFN_ITEMS
#include "emacsfn.h"
};
static struct x_defbindings const x_defbindings[] = {
{ XFUNC_del_back, 0, CTRL_QM },
{ XFUNC_del_bword, 1, CTRL_QM },
{ XFUNC_eot_del, 0, CTRL_D },
{ XFUNC_del_back, 0, CTRL_H },
{ XFUNC_del_bword, 1, CTRL_H },
{ XFUNC_del_bword, 1, 'h' },
{ XFUNC_mv_bword, 1, 'b' },
{ XFUNC_mv_fword, 1, 'f' },
{ XFUNC_del_fword, 1, 'd' },
{ XFUNC_mv_back, 0, CTRL_B },
{ XFUNC_mv_forw, 0, CTRL_F },
{ XFUNC_search_char_forw, 0, CTRL_BC },
{ XFUNC_search_char_back, 1, CTRL_BC },
{ XFUNC_newline, 0, CTRL_M },
{ XFUNC_newline, 0, CTRL_J },
{ XFUNC_end_of_text, 0, CTRL_US },
{ XFUNC_abort, 0, CTRL_G },
{ XFUNC_prev_com, 0, CTRL_P },
{ XFUNC_next_com, 0, CTRL_N },
{ XFUNC_nl_next_com, 0, CTRL_O },
{ XFUNC_search_hist, 0, CTRL_R },
{ XFUNC_beg_hist, 1, '<' },
{ XFUNC_end_hist, 1, '>' },
{ XFUNC_goto_hist, 1, 'g' },
{ XFUNC_mv_end, 0, CTRL_E },
{ XFUNC_mv_beg, 0, CTRL_A },
{ XFUNC_draw_line, 0, CTRL_L },
{ XFUNC_cls, 1, CTRL_L },
{ XFUNC_meta1, 0, CTRL_BO },
{ XFUNC_meta2, 0, CTRL_X },
{ XFUNC_kill, 0, CTRL_K },
{ XFUNC_yank, 0, CTRL_Y },
{ XFUNC_meta_yank, 1, 'y' },
{ XFUNC_literal, 0, CTRL_CA },
{ XFUNC_comment, 1, '#' },
{ XFUNC_transpose, 0, CTRL_T },
{ XFUNC_complete, 1, CTRL_BO },
{ XFUNC_comp_list, 0, CTRL_I },
{ XFUNC_comp_list, 1, '=' },
{ XFUNC_enumerate, 1, '?' },
{ XFUNC_expand, 1, '*' },
{ XFUNC_comp_file, 1, CTRL_X },
{ XFUNC_comp_comm, 2, CTRL_BO },
{ XFUNC_list_comm, 2, '?' },
{ XFUNC_list_file, 2, CTRL_Y },
{ XFUNC_set_mark, 1, ' ' },
{ XFUNC_kill_region, 0, CTRL_W },
{ XFUNC_xchg_point_mark, 2, CTRL_X },
{ XFUNC_literal, 0, CTRL_V },
{ XFUNC_version, 1, CTRL_V },
{ XFUNC_prev_histword, 1, '.' },
{ XFUNC_prev_histword, 1, '_' },
{ XFUNC_set_arg, 1, '0' },
{ XFUNC_set_arg, 1, '1' },
{ XFUNC_set_arg, 1, '2' },
{ XFUNC_set_arg, 1, '3' },
{ XFUNC_set_arg, 1, '4' },
{ XFUNC_set_arg, 1, '5' },
{ XFUNC_set_arg, 1, '6' },
{ XFUNC_set_arg, 1, '7' },
{ XFUNC_set_arg, 1, '8' },
{ XFUNC_set_arg, 1, '9' },
#ifndef MKSH_SMALL
{ XFUNC_fold_upper, 1, 'U' },
{ XFUNC_fold_upper, 1, 'u' },
{ XFUNC_fold_lower, 1, 'L' },
{ XFUNC_fold_lower, 1, 'l' },
{ XFUNC_fold_capitalise, 1, 'C' },
{ XFUNC_fold_capitalise, 1, 'c' },
#endif
/*
* These for ANSI arrow keys: arguablely shouldn't be here by
* default, but its simpler/faster/smaller than using termcap
* entries.
*/
{ XFUNC_meta2, 1, '[' },
{ XFUNC_meta2, 1, 'O' },
{ XFUNC_prev_com, 2, 'A' },
{ XFUNC_next_com, 2, 'B' },
{ XFUNC_mv_forw, 2, 'C' },
{ XFUNC_mv_back, 2, 'D' },
#ifndef MKSH_SMALL
{ XFUNC_vt_hack, 2, '1' },
{ XFUNC_mv_beg | 0x80, 2, '7' },
{ XFUNC_mv_beg, 2, 'H' },
{ XFUNC_mv_end | 0x80, 2, '4' },
{ XFUNC_mv_end | 0x80, 2, '8' },
{ XFUNC_mv_end, 2, 'F' },
{ XFUNC_del_char | 0x80, 2, '3' },
{ XFUNC_del_char, 2, 'P' },
{ XFUNC_search_hist_up | 0x80, 2, '5' },
{ XFUNC_search_hist_dn | 0x80, 2, '6' },
#endif
/* PC scancodes */
#if !defined(MKSH_SMALL) || defined(__OS2__)
{ XFUNC_meta3, 0, 0 },
{ XFUNC_mv_beg, 3, 71 },
{ XFUNC_prev_com, 3, 72 },
#ifndef MKSH_SMALL
{ XFUNC_search_hist_up, 3, 73 },
#endif
{ XFUNC_mv_back, 3, 75 },
{ XFUNC_mv_forw, 3, 77 },
{ XFUNC_mv_end, 3, 79 },
{ XFUNC_next_com, 3, 80 },
#ifndef MKSH_SMALL
{ XFUNC_search_hist_dn, 3, 81 },
#endif
{ XFUNC_del_char, 3, 83 },
#endif
#ifndef MKSH_SMALL
/* more non-standard ones */
{ XFUNC_eval_region, 1, CTRL_E },
{ XFUNC_edit_line, 2, 'e' }
#endif
};
static size_t
x_nb2nc(size_t nb)
{
char *cp;
size_t nc = 0;
for (cp = xcp; cp < (xcp + nb); ++nc)
cp += utf_ptradj(cp);
return (nc);
}
static void
x_modified(void)
{
if (!modified) {
x_histmcp = x_histp;
x_histp = histptr + 1;
modified = 1;
}
}
#ifdef MKSH_SMALL
#define XFUNC_VALUE(f) (f)
#else
#define XFUNC_VALUE(f) (f & 0x7F)
#endif
static int
x_e_getmbc(char *sbuf)
{
int c, pos = 0;
unsigned char *buf = (unsigned char *)sbuf;
memset(buf, 0, 4);
buf[pos++] = c = x_e_getc();
if (c == -1)
return (-1);
if (UTFMODE) {
if ((rtt2asc(buf[0]) >= (unsigned char)0xC2) &&
(rtt2asc(buf[0]) < (unsigned char)0xF0)) {
c = x_e_getc();
if (c == -1)
return (-1);
if ((rtt2asc(c) & 0xC0) != 0x80) {
x_e_ungetc(c);
return (1);
}
buf[pos++] = c;
}
if ((rtt2asc(buf[0]) >= (unsigned char)0xE0) &&
(rtt2asc(buf[0]) < (unsigned char)0xF0)) {
/* XXX x_e_ungetc is one-octet only */
buf[pos++] = c = x_e_getc();
if (c == -1)
return (-1);
}
}
return (pos);
}
/*
* minimum required space to work with on a line - if the prompt
* leaves less space than this on a line, the prompt is truncated
*/
#define MIN_EDIT_SPACE 7
static void
x_init_prompt(bool doprint)
{
prompt_trunc = pprompt(prompt, doprint ? 0 : -1);
pwidth = prompt_trunc % x_cols;
prompt_trunc -= pwidth;
if ((mksh_uari_t)pwidth > ((mksh_uari_t)x_cols - 3 - MIN_EDIT_SPACE)) {
/* force newline after prompt */
prompt_trunc = -1;
pwidth = 0;
if (doprint)
x_e_putc2('\n');
}
}
static int
x_emacs(char *buf)
{
int c, i;
unsigned char f;
xbp = xbuf = buf;
xend = buf + LINE;
xlp = xcp = xep = buf;
*xcp = 0;
xlp_valid = true;
xmp = NULL;
x_curprefix = 0;
x_histmcp = x_histp = histptr + 1;
x_last_command = XFUNC_error;
x_init_prompt(true);
x_displen = (xx_cols = x_cols) - 2 - (x_col = pwidth);
x_adj_done = 0;
x_adj_ok = true;
x_histncp = NULL;
if (x_nextcmd >= 0) {
int off = source->line - x_nextcmd;
if (histptr - history >= off) {
x_load_hist(histptr - off);
x_histncp = x_histp;
}
x_nextcmd = -1;
}
editmode = 1;
while (/* CONSTCOND */ 1) {
x_flush();
if ((c = x_e_getc()) < 0)
return (0);
f = x_curprefix == -1 ? XFUNC_insert :
x_tab[x_curprefix][c];
#ifndef MKSH_SMALL
if (f & 0x80) {
f &= 0x7F;
if ((i = x_e_getc()) != '~')
x_e_ungetc(i);
}
/* avoid bind key macro recursion */
if (macroptr && f == XFUNC_ins_string)
f = XFUNC_insert;
#endif
if (!(x_ftab[f].xf_flags & XF_PREFIX) &&
x_last_command != XFUNC_set_arg) {
x_arg = 1;
x_arg_defaulted = true;
}
i = c | (x_curprefix << 8);
x_curprefix = 0;
switch ((*x_ftab[f].xf_func)(i)) {
case KSTD:
if (!(x_ftab[f].xf_flags & XF_PREFIX))
x_last_command = f;
break;
case KEOL:
i = xep - xbuf;
return (i);
case KINTR:
/* special case for interrupt */
x_intr(SIGINT, c);
}
/* ad-hoc hack for fixing the cursor position */
x_goto(xcp);
}
}
static int
x_insert(int c)
{
static int left, pos, save_arg;
static char str[4];
/*
* Should allow tab and control chars.
*/
if (c == 0) {
invmbs:
left = 0;
x_e_putc2(KSH_BEL);
return (KSTD);
}
if (UTFMODE) {
if (((rtt2asc(c) & 0xC0) == 0x80) && left) {
str[pos++] = c;
if (!--left) {
str[pos] = '\0';
x_arg = save_arg;
while (x_arg--)
x_ins(str);
}
return (KSTD);
}
if (left) {
if (x_curprefix == -1) {
/* flush invalid multibyte */
str[pos] = '\0';
while (save_arg--)
x_ins(str);
}
}
if ((c >= 0xC2) && (c < 0xE0))
left = 1;
else if ((c >= 0xE0) && (c < 0xF0))
left = 2;
else if (c > 0x7F)
goto invmbs;
else
left = 0;
if (left) {
save_arg = x_arg;
pos = 1;
str[0] = c;
return (KSTD);
}
}
left = 0;
str[0] = c;
str[1] = '\0';
while (x_arg--)
x_ins(str);
return (KSTD);
}
#ifndef MKSH_SMALL
static int
x_ins_string(int c)
{
macroptr = x_atab[c >> 8][c & 255];
/*
* we no longer need to bother checking if macroptr is
* not NULL but first char is NUL; x_e_getc() does it
*/
return (KSTD);
}
#endif
static int
x_do_ins(const char *cp, size_t len)
{
if (xep + len >= xend) {
x_e_putc2(KSH_BEL);
return (-1);
}
memmove(xcp + len, xcp, xep - xcp + 1);
memmove(xcp, cp, len);
xcp += len;
xep += len;
x_modified();
return (0);
}
static int
x_ins(const char *s)
{
char *cp = xcp;
int adj = x_adj_done;
if (x_do_ins(s, strlen(s)) < 0)
return (-1);
/*
* x_zots() may result in a call to x_adjust()
* we want xcp to reflect the new position.
*/
xlp_valid = false;
x_lastcp();
x_adj_ok = tobool(xcp >= xlp);
x_zots(cp);
if (adj == x_adj_done)
/* x_adjust() has not been called */
x_lastpos();
x_adj_ok = true;
return (0);
}
static int
x_del_back(int c MKSH_A_UNUSED)
{
ssize_t i = 0;
if (xcp == xbuf) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
do {
x_goto(xcp - 1);
} while ((++i < x_arg) && (xcp != xbuf));
x_delete(i, false);
return (KSTD);
}
static int
x_del_char(int c MKSH_A_UNUSED)
{
char *cp, *cp2;
size_t i = 0;
cp = xcp;
while (i < (size_t)x_arg) {
utf_ptradjx(cp, cp2);
if (cp2 > xep)
break;
cp = cp2;
i++;
}
if (!i) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
x_delete(i, false);
return (KSTD);
}
/* Delete nc chars to the right of the cursor (including cursor position) */
static void
x_delete(size_t nc, bool push)
{
size_t i, nb, nw;
char *cp;
if (nc == 0)
return;
nw = 0;
cp = xcp;
for (i = 0; i < nc; ++i) {
char *cp2;
int j;
j = x_size2(cp, &cp2);
if (cp2 > xep)
break;
cp = cp2;
nw += j;
}
nb = cp - xcp;
/* nc = i; */
if (xmp != NULL && xmp > xcp) {
if (xcp + nb > xmp)
xmp = xcp;
else
xmp -= nb;
}
/*
* This lets us yank a word we have deleted.
*/
if (push)
x_push(nb);
xep -= nb;
/* Copies the NUL */
memmove(xcp, xcp + nb, xep - xcp + 1);
/* don't redraw */
x_adj_ok = false;
xlp_valid = false;
x_zots(xcp);
/*
* if we are already filling the line,
* there is no need to ' ', '\b'.
* But if we must, make sure we do the minimum.
*/
if ((i = xx_cols - 2 - x_col) > 0 || xep - xlp == 0) {
nw = i = (nw < i) ? nw : i;
while (i--)
x_e_putc2(' ');
if (x_col == xx_cols - 2) {
x_e_putc2((xep > xlp) ? '>' : (xbp > xbuf) ? '<' : ' ');
++nw;
}
while (nw--)
x_e_putc2('\b');
}
/*x_goto(xcp);*/
x_adj_ok = true;
xlp_valid = false;
x_lastpos();
x_modified();
return;
}
static int
x_del_bword(int c MKSH_A_UNUSED)
{
x_delete(x_bword(), true);
return (KSTD);
}
static int
x_mv_bword(int c MKSH_A_UNUSED)
{
x_bword();
return (KSTD);
}
static int
x_mv_fword(int c MKSH_A_UNUSED)
{
x_fword(true);
return (KSTD);
}
static int
x_del_fword(int c MKSH_A_UNUSED)
{
x_delete(x_fword(false), true);
return (KSTD);
}
static size_t
x_bword(void)
{
size_t nb = 0;
char *cp = xcp;
if (cp == xbuf) {
x_e_putc2(KSH_BEL);
return (0);
}
while (x_arg--) {
while (cp != xbuf && ctype(cp[-1], C_MFS)) {
cp--;
nb++;
}
while (cp != xbuf && !ctype(cp[-1], C_MFS)) {
cp--;
nb++;
}
}
x_goto(cp);
return (x_nb2nc(nb));
}
static size_t
x_fword(bool move)
{
size_t nc;
char *cp = xcp;
if (cp == xep) {
x_e_putc2(KSH_BEL);
return (0);
}
while (x_arg--) {
while (cp != xep && ctype(*cp, C_MFS))
cp++;
while (cp != xep && !ctype(*cp, C_MFS))
cp++;
}
nc = x_nb2nc(cp - xcp);
if (move)
x_goto(cp);
return (nc);
}
static void
x_goto(char *cp)
{
cp = cp >= xep ? xep : x_bs0(cp, xbuf);
if (cp < xbp || cp >= utf_skipcols(xbp, x_displen, NULL)) {
/* we are heading off screen */
xcp = cp;
x_adjust();
} else if (cp < xcp) {
/* move back */
while (cp < xcp)
x_bs3(&xcp);
} else if (cp > xcp) {
/* move forward */
while (cp > xcp)
x_zotc3(&xcp);
}
}
static char *
x_bs0(char *cp, char *lower_bound)
{
if (UTFMODE)
while ((!lower_bound || (cp > lower_bound)) &&
((rtt2asc(*cp) & 0xC0) == 0x80))
--cp;
return (cp);
}
static void
x_bs3(char **p)
{
int i;
*p = x_bs0((*p) - 1, NULL);
i = x_size2(*p, NULL);
while (i--)
x_e_putc2('\b');
}
static int
x_size2(char *cp, char **dcp)
{
uint8_t c = *(unsigned char *)cp;
if (UTFMODE && (rtt2asc(c) > 0x7F))
return (utf_widthadj(cp, (const char **)dcp));
if (dcp)
*dcp = cp + 1;
if (c == '\t')
/* Kludge, tabs are always four spaces. */
return (4);
if (ksh_isctrl(c))
/* control unsigned char */
return (2);
return (1);
}
static void
x_zots(char *str)
{
int adj = x_adj_done;
x_lastcp();
while (*str && str < xlp && x_col < xx_cols && adj == x_adj_done)
x_zotc3(&str);
}
static void
x_zotc3(char **cp)
{
unsigned char c = **(unsigned char **)cp;
if (c == '\t') {
/* Kludge, tabs are always four spaces. */
x_e_puts(T4spaces);
(*cp)++;
} else if (ksh_isctrl(c)) {
x_e_putc2('^');
x_e_putc2(ksh_unctrl(c));
(*cp)++;
} else
x_e_putc3((const char **)cp);
}
static int
x_mv_back(int c MKSH_A_UNUSED)
{
if (xcp == xbuf) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
while (x_arg--) {
x_goto(xcp - 1);
if (xcp == xbuf)
break;
}
return (KSTD);
}
static int
x_mv_forw(int c MKSH_A_UNUSED)
{
char *cp = xcp, *cp2;
if (xcp == xep) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
while (x_arg--) {
utf_ptradjx(cp, cp2);
if (cp2 > xep)
break;
cp = cp2;
}
x_goto(cp);
return (KSTD);
}
static int
x_search_char_forw(int c MKSH_A_UNUSED)
{
char *cp = xcp;
char tmp[4];
*xep = '\0';
if (x_e_getmbc(tmp) < 0) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
while (x_arg--) {
if ((cp = (cp == xep) ? NULL : strstr(cp + 1, tmp)) == NULL &&
(cp = strstr(xbuf, tmp)) == NULL) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
}
x_goto(cp);
return (KSTD);
}
static int
x_search_char_back(int c MKSH_A_UNUSED)
{
char *cp = xcp, *p, tmp[4];
bool b;
if (x_e_getmbc(tmp) < 0) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
for (; x_arg--; cp = p)
for (p = cp; ; ) {
if (p-- == xbuf)
p = xep;
if (p == cp) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
if ((tmp[1] && ((p+1) > xep)) ||
(tmp[2] && ((p+2) > xep)))
continue;
b = true;
if (*p != tmp[0])
b = false;
if (b && tmp[1] && p[1] != tmp[1])
b = false;
if (b && tmp[2] && p[2] != tmp[2])
b = false;
if (b)
break;
}
x_goto(cp);
return (KSTD);
}
static int
x_newline(int c MKSH_A_UNUSED)
{
x_e_putc2('\r');
x_e_putc2('\n');
x_flush();
*xep++ = '\n';
return (KEOL);
}
static int
x_end_of_text(int c MKSH_A_UNUSED)
{
unsigned char tmp[1], *cp = tmp;
*tmp = isedchar(edchars.eof) ? (unsigned char)edchars.eof :
(unsigned char)CTRL_D;
x_zotc3((char **)&cp);
x_putc('\r');
x_putc('\n');
x_flush();
return (KEOL);
}
static int
x_beg_hist(int c MKSH_A_UNUSED)
{
x_load_hist(history);
return (KSTD);
}
static int
x_end_hist(int c MKSH_A_UNUSED)
{
x_load_hist(histptr);
return (KSTD);
}
static int
x_prev_com(int c MKSH_A_UNUSED)
{
x_load_hist(x_histp - x_arg);
return (KSTD);
}
static int
x_next_com(int c MKSH_A_UNUSED)
{
x_load_hist(x_histp + x_arg);
return (KSTD);
}
/*
* Goto a particular history number obtained from argument.
* If no argument is given history 1 is probably not what you
* want so we'll simply go to the oldest one.
*/
static int
x_goto_hist(int c MKSH_A_UNUSED)
{
if (x_arg_defaulted)
x_load_hist(history);
else
x_load_hist(histptr + x_arg - source->line);
return (KSTD);
}
static void
x_load_hist(char **hp)
{
char *sp = NULL;
if (hp == histptr + 1) {
sp = holdbufp;
modified = 0;
} else if (hp < history || hp > histptr) {
x_e_putc2(KSH_BEL);
return;
}
if (sp == NULL)
sp = *hp;
x_histp = hp;
if (modified)
strlcpy(holdbufp, xbuf, LINE);
strlcpy(xbuf, sp, xend - xbuf);
xbp = xbuf;
xep = xcp = strnul(xbuf);
x_adjust();
modified = 0;
}
static int
x_nl_next_com(int c MKSH_A_UNUSED)
{
if (!modified)
x_histmcp = x_histp;
if (!x_histncp || (x_histmcp != x_histncp && x_histmcp != histptr + 1))
/* fresh start of ^O */
x_histncp = x_histmcp;
x_nextcmd = source->line - (histptr - x_histncp) + 1;
return (x_newline('\n'));
}
static int
x_eot_del(int c)
{
if (xep == xbuf && x_arg_defaulted)
return (x_end_of_text(c));
else
return (x_del_char(c));
}
/* reverse incremental history search */
static int
x_search_hist(int c)
{
int offset = -1; /* offset of match in xbuf, else -1 */
char pat[80 + 1]; /* pattern buffer */
char *p = pat;
unsigned char f;
*p = '\0';
while (/* CONSTCOND */ 1) {
if (offset < 0) {
x_e_puts("\nI-search: ");
x_e_puts(pat);
}
x_flush();
if ((c = x_e_getc()) < 0)
return (KSTD);
f = x_tab[0][c];
if (c == CTRL_BO) {
if ((f & 0x7F) == XFUNC_meta1) {
if ((c = x_e_getc()) < 0)
return (KSTD);
f = x_tab[1][c] & 0x7F;
if (f == XFUNC_meta1 || f == XFUNC_meta2)
x_meta1(CTRL_BO);
x_e_ungetc(c);
}
break;
}
#ifndef MKSH_SMALL
if (f & 0x80) {
f &= 0x7F;
if ((c = x_e_getc()) != '~')
x_e_ungetc(c);
}
#endif
if (f == XFUNC_search_hist)
offset = x_search(pat, 0, offset);
else if (f == XFUNC_del_back) {
if (p == pat) {
offset = -1;
break;
}
if (p > pat) {
p = x_bs0(p - 1, pat);
*p = '\0';
}
if (p == pat)
offset = -1;
else
offset = x_search(pat, 1, offset);
continue;
} else if (f == XFUNC_insert) {
/* add char to pattern */
/* overflow check... */
if ((size_t)(p - pat) >= sizeof(pat) - 1) {
x_e_putc2(KSH_BEL);
continue;
}
*p++ = c, *p = '\0';
if (offset >= 0) {
/* already have partial match */
offset = x_match(xbuf, pat);
if (offset >= 0) {
x_goto(xbuf + offset + (p - pat) -
(*pat == '^'));
continue;
}
}
offset = x_search(pat, 0, offset);
} else if (f == XFUNC_abort) {
if (offset >= 0)
x_load_hist(histptr + 1);
break;
} else {
/* other command */
x_e_ungetc(c);
break;
}
}
if (offset < 0)
x_redraw('\n');
return (KSTD);
}
/* search backward from current line */
static int
x_search(char *pat, int sameline, int offset)
{
char **hp;
int i;
for (hp = x_histp - (sameline ? 0 : 1); hp >= history; --hp) {
i = x_match(*hp, pat);
if (i >= 0) {
if (offset < 0)
x_e_putc2('\n');
x_load_hist(hp);
x_goto(xbuf + i + strlen(pat) - (*pat == '^'));
return (i);
}
}
x_e_putc2(KSH_BEL);
x_histp = histptr;
return (-1);
}
#ifndef MKSH_SMALL
/* anchored search up from current line */
static int
x_search_hist_up(int c MKSH_A_UNUSED)
{
return (x_search_dir(-1));
}
/* anchored search down from current line */
static int
x_search_hist_dn(int c MKSH_A_UNUSED)
{
return (x_search_dir(1));
}
/* anchored search in the indicated direction */
static int
x_search_dir(int search_dir /* should've been bool */)
{
char **hp = x_histp + search_dir;
size_t curs = xcp - xbuf;
while (histptr >= hp && hp >= history) {
if (strncmp(xbuf, *hp, curs) == 0) {
x_load_hist(hp);
x_goto(xbuf + curs);
break;
}
hp += search_dir;
}
return (KSTD);
}
#endif
/* return position of first match of pattern in string, else -1 */
static int
x_match(char *str, char *pat)
{
if (*pat == '^') {
return ((strncmp(str, pat + 1, strlen(pat + 1)) == 0) ? 0 : -1);
} else {
char *q = strstr(str, pat);
return ((q == NULL) ? -1 : q - str);
}
}
static int
x_del_line(int c MKSH_A_UNUSED)
{
*xep = 0;
x_push(xep - (xcp = xbuf));
xlp = xbp = xep = xbuf;
xlp_valid = true;
*xcp = 0;
xmp = NULL;
x_redraw('\r');
x_modified();
return (KSTD);
}
static int
x_mv_end(int c MKSH_A_UNUSED)
{
x_goto(xep);
return (KSTD);
}
static int
x_mv_beg(int c MKSH_A_UNUSED)
{
x_goto(xbuf);
return (KSTD);
}
static int
x_draw_line(int c MKSH_A_UNUSED)
{
x_redraw('\n');
return (KSTD);
}
static int
x_cls(int c MKSH_A_UNUSED)
{
shf_puts(MKSH_CLS_STRING, shl_out);
x_redraw(0);
return (KSTD);
}
/*
* clear line from x_col (current cursor position) to xx_cols - 2,
* then output lastch, then go back to x_col; if lastch is space,
* clear with termcap instead of spaces, or not if line_was_cleared;
* lastch MUST be an ASCII character with wcwidth(lastch) == 1
*/
static void
x_clrtoeol(int lastch, bool line_was_cleared)
{
int col;
if (lastch == ' ' && !line_was_cleared && x_term_mode == 1) {
shf_puts(KSH_ESC_STRING "[K", shl_out);
line_was_cleared = true;
}
if (lastch == ' ' && line_was_cleared)
return;
col = x_col;
while (col < (xx_cols - 2)) {
x_putc(' ');
++col;
}
x_putc(lastch);
++col;
while (col > x_col) {
x_putc('\b');
--col;
}
}
/* output the prompt, assuming a line has just been started */
static void
x_pprompt(void)
{
if (prompt_trunc != -1)
pprompt(prompt, prompt_trunc);
x_col = pwidth;
}
/* output CR, then redraw the line, clearing to EOL if needed (cr ≠ 0, LF) */
static void
x_redraw(int cr)
{
int lch;
x_adj_ok = false;
/* clear the line */
x_e_putc2(cr ? cr : '\r');
x_flush();
/* display the prompt */
if (xbp == xbuf)
x_pprompt();
x_displen = xx_cols - 2 - x_col;
/* display the line content */
xlp_valid = false;
x_zots(xbp);
/* check whether there is more off-screen */
lch = xep > xlp ? (xbp > xbuf ? '*' : '>') : (xbp > xbuf) ? '<' : ' ';
/* clear the rest of the line */
x_clrtoeol(lch, !cr || cr == '\n');
/* go back to actual cursor position */
x_lastpos();
x_adj_ok = true;
}
static int
x_transpose(int c MKSH_A_UNUSED)
{
unsigned int tmpa, tmpb;
/*-
* What transpose is meant to do seems to be up for debate. This
* is a general summary of the options; the text is abcd with the
* upper case character or underscore indicating the cursor position:
* Who Before After Before After
* AT&T ksh in emacs mode: abCd abdC abcd_ (bell)
* AT&T ksh in gmacs mode: abCd baCd abcd_ abdc_
* gnu emacs: abCd acbD abcd_ abdc_
* Pdksh currently goes with GNU behavior since I believe this is the
* most common version of emacs, unless in gmacs mode, in which case
* it does the AT&T ksh gmacs mode.
* This should really be broken up into 3 functions so users can bind
* to the one they want.
*/
if (xcp == xbuf) {
x_e_putc2(KSH_BEL);
return (KSTD);
} else if (xcp == xep || Flag(FGMACS)) {
if (xcp - xbuf == 1) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
/*
* Gosling/Unipress emacs style: Swap two characters before
* the cursor, do not change cursor position
*/
x_bs3(&xcp);
if (utf_mbtowc(&tmpa, xcp) == (size_t)-1) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
x_bs3(&xcp);
if (utf_mbtowc(&tmpb, xcp) == (size_t)-1) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
utf_wctomb(xcp, tmpa);
x_zotc3(&xcp);
utf_wctomb(xcp, tmpb);
x_zotc3(&xcp);
} else {
/*
* GNU emacs style: Swap the characters before and under the
* cursor, move cursor position along one.
*/
if (utf_mbtowc(&tmpa, xcp) == (size_t)-1) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
x_bs3(&xcp);
if (utf_mbtowc(&tmpb, xcp) == (size_t)-1) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
utf_wctomb(xcp, tmpa);
x_zotc3(&xcp);
utf_wctomb(xcp, tmpb);
x_zotc3(&xcp);
}
x_modified();
return (KSTD);
}
static int
x_literal(int c MKSH_A_UNUSED)
{
x_curprefix = -1;
return (KSTD);
}
static int
x_meta1(int c MKSH_A_UNUSED)
{
x_curprefix = 1;
return (KSTD);
}
static int
x_meta2(int c MKSH_A_UNUSED)
{
x_curprefix = 2;
return (KSTD);
}
static int
x_meta3(int c MKSH_A_UNUSED)
{
x_curprefix = 3;
return (KSTD);
}
static int
x_kill(int c MKSH_A_UNUSED)
{
size_t col = xcp - xbuf;
size_t lastcol = xep - xbuf;
size_t ndel, narg;
if (x_arg_defaulted || (narg = x_arg) > lastcol)
narg = lastcol;
if (narg < col) {
x_goto(xbuf + narg);
ndel = col - narg;
} else
ndel = narg - col;
x_delete(x_nb2nc(ndel), true);
return (KSTD);
}
static void
x_push(size_t nchars)
{
afree(killstack[killsp], AEDIT);
strndupx(killstack[killsp], xcp, nchars, AEDIT);
killsp = (killsp + 1) % KILLSIZE;
}
static int
x_yank(int c MKSH_A_UNUSED)
{
if (killsp == 0)
killtp = KILLSIZE;
else
killtp = killsp;
killtp--;
if (killstack[killtp] == 0) {
x_e_puts("\nnothing to yank");
x_redraw('\n');
return (KSTD);
}
xmp = xcp;
x_ins(killstack[killtp]);
return (KSTD);
}
static int
x_meta_yank(int c MKSH_A_UNUSED)
{
size_t len;
if ((x_last_command != XFUNC_yank && x_last_command != XFUNC_meta_yank) ||
killstack[killtp] == 0) {
killtp = killsp;
x_e_puts("\nyank something first");
x_redraw('\n');
return (KSTD);
}
len = strlen(killstack[killtp]);
x_goto(xcp - len);
x_delete(x_nb2nc(len), false);
do {
if (killtp == 0)
killtp = KILLSIZE - 1;
else
killtp--;
} while (killstack[killtp] == 0);
x_ins(killstack[killtp]);
return (KSTD);
}
/* fake receiving an interrupt */
static void
x_intr(int signo, int c)
{
x_vi_zotc(c);
*xep = '\0';
strip_nuls(xbuf, xep - xbuf);
if (*xbuf)
histsave(&source->line, xbuf, HIST_STORE, true);
xlp = xep = xcp = xbp = xbuf;
xlp_valid = true;
*xcp = 0;
x_modified();
x_flush();
trapsig(signo);
x_mode(false);
unwind(LSHELL);
}
static int
x_abort(int c MKSH_A_UNUSED)
{
return (KINTR);
}
static int
x_error(int c MKSH_A_UNUSED)
{
x_e_putc2(KSH_BEL);
return (KSTD);
}
#ifndef MKSH_SMALL
/* special VT100 style key sequence hack */
static int
x_vt_hack(int c)
{
/* we only support PF2-'1' for now */
if (c != (2 << 8 | '1'))
return (x_error(c));
/* what's the next character? */
switch ((c = x_e_getc())) {
case '~':
x_arg = 1;
x_arg_defaulted = true;
return (x_mv_beg(0));
case ';':
/* "interesting" sequence detected */
break;
default:
goto unwind_err;
}
/* XXX x_e_ungetc is one-octet only */
if ((c = x_e_getc()) != '5' && c != '3')
goto unwind_err;
/*-
* At this point, we have read the following octets so far:
* - ESC+[ or ESC+O or Ctrl-X (Prefix 2)
* - 1 (vt_hack)
* - ;
* - 5 (Ctrl key combiner) or 3 (Alt key combiner)
* We can now accept one more octet designating the key.
*/
switch ((c = x_e_getc())) {
case 'C':
return (x_mv_fword(c));
case 'D':
return (x_mv_bword(c));
}
unwind_err:
x_e_ungetc(c);
return (x_error(c));
}
#endif
static char *
x_mapin(const char *cp, Area *ap)
{
char *news, *op;
strdupx(news, cp, ap);
op = news;
while (*cp) {
switch (*cp) {
case '^':
cp++;
*op++ = ksh_toctrl(*cp);
break;
case '\\':
if (cp[1] == '\\' || cp[1] == '^')
++cp;
/* FALLTHROUGH */
default:
*op++ = *cp;
}
cp++;
}
*op = '\0';
return (news);
}
static void
x_mapout2(int c, char **buf)
{
char *p = *buf;
if (ksh_isctrl(c)) {
*p++ = '^';
*p++ = ksh_unctrl(c);
} else
*p++ = c;
*p = 0;
*buf = p;
}
static char *
x_mapout(int c)
{
static char buf[8];
char *bp = buf;
x_mapout2(c, &bp);
return (buf);
}
static void
x_print(int prefix, int key)
{
int f = x_tab[prefix][key];
if (prefix)
/* prefix == 1 || prefix == 2 || prefix == 3 */
shf_puts(x_mapout(prefix == 1 ? CTRL_BO :
prefix == 2 ? CTRL_X : 0), shl_stdout);
#ifdef MKSH_SMALL
shprintf("%s = ", x_mapout(key));
#else
shprintf("%s%s = ", x_mapout(key), (f & 0x80) ? "~" : "");
if (XFUNC_VALUE(f) != XFUNC_ins_string)
#endif
shprintf(Tf_sN, x_ftab[XFUNC_VALUE(f)].xf_name);
#ifndef MKSH_SMALL
else
shprintf("'%s'\n", x_atab[prefix][key]);
#endif
}
int
x_bind(const char *a1, const char *a2,
#ifndef MKSH_SMALL
/* bind -m */
bool macro,
#endif
/* bind -l */
bool list)
{
unsigned char f;
int prefix, key;
char *m1, *m2;
#ifndef MKSH_SMALL
char *sp = NULL;
bool hastilde;
#endif
if (x_tab == NULL) {
bi_errorf("can't bind, not a tty");
return (1);
}
/* List function names */
if (list) {
for (f = 0; f < NELEM(x_ftab); f++)
if (!(x_ftab[f].xf_flags & XF_NOBIND))
shprintf(Tf_sN, x_ftab[f].xf_name);
return (0);
}
if (a1 == NULL) {
for (prefix = 0; prefix < X_NTABS; prefix++)
for (key = 0; key < X_TABSZ; key++) {
f = XFUNC_VALUE(x_tab[prefix][key]);
if (f == XFUNC_insert || f == XFUNC_error
#ifndef MKSH_SMALL
|| (macro && f != XFUNC_ins_string)
#endif
)
continue;
x_print(prefix, key);
}
return (0);
}
m2 = m1 = x_mapin(a1, ATEMP);
prefix = 0;
for (;; m1++) {
key = (unsigned char)*m1;
f = XFUNC_VALUE(x_tab[prefix][key]);
if (f == XFUNC_meta1)
prefix = 1;
else if (f == XFUNC_meta2)
prefix = 2;
else if (f == XFUNC_meta3)
prefix = 3;
else
break;
}
if (*++m1
#ifndef MKSH_SMALL
&& ((*m1 != '~') || *(m1 + 1))
#endif
) {
char msg[256];
const char *c = a1;
m1 = msg;
while (*c && (size_t)(m1 - msg) < sizeof(msg) - 3)
x_mapout2(*c++, &m1);
bi_errorf("too long key sequence: %s", msg);
return (1);
}
#ifndef MKSH_SMALL
hastilde = tobool(*m1);
#endif
afree(m2, ATEMP);
if (a2 == NULL) {
x_print(prefix, key);
return (0);
}
if (*a2 == 0) {
f = XFUNC_insert;
#ifndef MKSH_SMALL
} else if (macro) {
f = XFUNC_ins_string;
sp = x_mapin(a2, AEDIT);
#endif
} else {
for (f = 0; f < NELEM(x_ftab); f++)
if (!strcmp(x_ftab[f].xf_name, a2))
break;
if (f == NELEM(x_ftab) || x_ftab[f].xf_flags & XF_NOBIND) {
bi_errorf("%s: no such function", a2);
return (1);
}
}
#ifndef MKSH_SMALL
if (XFUNC_VALUE(x_tab[prefix][key]) == XFUNC_ins_string &&
x_atab[prefix][key])
afree(x_atab[prefix][key], AEDIT);
#endif
x_tab[prefix][key] = f
#ifndef MKSH_SMALL
| (hastilde ? 0x80 : 0)
#endif
;
#ifndef MKSH_SMALL
x_atab[prefix][key] = sp;
#endif
/* Track what the user has bound so x_mode(true) won't toast things */
if (f == XFUNC_insert)
x_bound[(prefix * X_TABSZ + key) / 8] &=
~(1 << ((prefix * X_TABSZ + key) % 8));
else
x_bound[(prefix * X_TABSZ + key) / 8] |=
(1 << ((prefix * X_TABSZ + key) % 8));
return (0);
}
static void
bind_if_not_bound(int p, int k, int func)
{
int t;
/*
* Has user already bound this key?
* If so, do not override it.
*/
t = p * X_TABSZ + k;
if (x_bound[t >> 3] & (1 << (t & 7)))
return;
x_tab[p][k] = func;
}
static int
x_set_mark(int c MKSH_A_UNUSED)
{
xmp = xcp;
return (KSTD);
}
static int
x_kill_region(int c MKSH_A_UNUSED)
{
size_t rsize;
char *xr;
if (xmp == NULL) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
if (xmp > xcp) {
rsize = xmp - xcp;
xr = xcp;
} else {
rsize = xcp - xmp;
xr = xmp;
}
x_goto(xr);
x_delete(x_nb2nc(rsize), true);
xmp = xr;
return (KSTD);
}
static int
x_xchg_point_mark(int c MKSH_A_UNUSED)
{
char *tmp;
if (xmp == NULL) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
tmp = xmp;
xmp = xcp;
x_goto(tmp);
return (KSTD);
}
static int
x_noop(int c MKSH_A_UNUSED)
{
return (KSTD);
}
/*
* File/command name completion routines
*/
static int
x_comp_comm(int c MKSH_A_UNUSED)
{
do_complete(XCF_COMMAND, CT_COMPLETE);
return (KSTD);
}
static int
x_list_comm(int c MKSH_A_UNUSED)
{
do_complete(XCF_COMMAND, CT_LIST);
return (KSTD);
}
static int
x_complete(int c MKSH_A_UNUSED)
{
do_complete(XCF_COMMAND_FILE, CT_COMPLETE);
return (KSTD);
}
static int
x_enumerate(int c MKSH_A_UNUSED)
{
do_complete(XCF_COMMAND_FILE, CT_LIST);
return (KSTD);
}
static int
x_comp_file(int c MKSH_A_UNUSED)
{
do_complete(XCF_FILE, CT_COMPLETE);
return (KSTD);
}
static int
x_list_file(int c MKSH_A_UNUSED)
{
do_complete(XCF_FILE, CT_LIST);
return (KSTD);
}
static int
x_comp_list(int c MKSH_A_UNUSED)
{
do_complete(XCF_COMMAND_FILE, CT_COMPLIST);
return (KSTD);
}
static int
x_expand(int c MKSH_A_UNUSED)
{
char **words;
int start, end, nwords, i;
i = XCF_FILE;
nwords = x_cf_glob(&i, xbuf, xep - xbuf, xcp - xbuf,
&start, &end, &words);
if (nwords == 0) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
x_goto(xbuf + start);
x_delete(x_nb2nc(end - start), false);
i = 0;
while (i < nwords) {
if (x_escape(words[i], strlen(words[i]), x_do_ins) < 0 ||
(++i < nwords && x_ins(T1space) < 0)) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
}
x_adjust();
return (KSTD);
}
static void
do_complete(
/* XCF_{COMMAND,FILE,COMMAND_FILE} */
int flags,
/* 0 for list, 1 for complete and 2 for complete-list */
Comp_type type)
{
char **words;
int start, end, nlen, olen, nwords;
bool completed;
nwords = x_cf_glob(&flags, xbuf, xep - xbuf, xcp - xbuf,
&start, &end, &words);
/* no match */
if (nwords == 0) {
x_e_putc2(KSH_BEL);
return;
}
if (type == CT_LIST) {
x_print_expansions(nwords, words,
tobool(flags & XCF_IS_COMMAND));
x_redraw(0);
x_free_words(nwords, words);
return;
}
olen = end - start;
nlen = x_longest_prefix(nwords, words);
if (nwords == 1) {
/*
* always complete single matches;
* any expansion of parameter substitution
* is always at most one result, too
*/
completed = true;
} else {
char *unescaped;
/* make a copy of the original string part */
strndupx(unescaped, xbuf + start, olen, ATEMP);
/* expand any tilde and unescape the string for comparison */
unescaped = x_glob_hlp_tilde_and_rem_qchar(unescaped, true);
/*
* match iff entire original string is part of the
* longest prefix, implying the latter is at least
* the same size (after unescaping)
*/
completed = !strncmp(words[0], unescaped, strlen(unescaped));
afree(unescaped, ATEMP);
}
if (type == CT_COMPLIST && nwords > 1) {
/*
* print expansions, since we didn't get back
* just a single match
*/
x_print_expansions(nwords, words,
tobool(flags & XCF_IS_COMMAND));
}
if (completed) {
/* expand on the command line */
xmp = NULL;
xcp = xbuf + start;
xep -= olen;
memmove(xcp, xcp + olen, xep - xcp + 1);
x_escape(words[0], nlen, x_do_ins);
}
x_adjust();
/*
* append a space if this is a single non-directory match
* and not a parameter or homedir substitution
*/
if (nwords == 1 && !mksh_cdirsep(words[0][nlen - 1]) &&
!(flags & XCF_IS_NOSPACE)) {
x_ins(T1space);
}
x_free_words(nwords, words);
}
/*-
* NAME:
* x_adjust - redraw the line adjusting starting point etc.
*
* DESCRIPTION:
* This function is called when we have exceeded the bounds
* of the edit window. It increments x_adj_done so that
* functions like x_ins and x_delete know that we have been
* called and can skip the x_bs() stuff which has already
* been done by x_redraw.
*
* RETURN VALUE:
* None
*/
static void
x_adjust(void)
{
int col_left, n;
/* flag the fact that we were called */
x_adj_done++;
/*
* calculate the amount of columns we need to "go back"
* from xcp to set xbp to (but never < xbuf) to 2/3 of
* the display width; take care of pwidth though
*/
if ((col_left = xx_cols * 2 / 3) < MIN_EDIT_SPACE) {
/*
* cowardly refuse to do anything
* if the available space is too small;
* fall back to dumb pdksh code
*/
if ((xbp = xcp - (x_displen / 2)) < xbuf)
xbp = xbuf;
/* elide UTF-8 fixup as penalty */
goto x_adjust_out;
}
/* fix up xbp to just past a character end first */
xbp = xcp >= xep ? xep : x_bs0(xcp, xbuf);
/* walk backwards */
while (xbp > xbuf && col_left > 0) {
xbp = x_bs0(xbp - 1, xbuf);
col_left -= (n = x_size2(xbp, NULL));
}
/* check if we hit the prompt */
if (xbp == xbuf && xcp != xbuf && col_left >= 0 && col_left < pwidth) {
/* so we did; force scrolling occurs */
xbp += utf_ptradj(xbp);
}
x_adjust_out:
xlp_valid = false;
x_redraw('\r');
x_flush();
}
static void
x_e_ungetc(int c)
{
unget_char = c < 0 ? -1 : (c & 255);
}
static int
x_e_getc(void)
{
int c;
if (unget_char >= 0) {
c = unget_char;
unget_char = -1;
return (c);
}
#ifndef MKSH_SMALL
if (macroptr) {
if ((c = (unsigned char)*macroptr++))
return (c);
macroptr = NULL;
}
#endif
return (x_getc());
}
static void
x_e_putc2(int c)
{
int width = 1;
if (ctype(c, C_CR | C_LF))
x_col = 0;
if (x_col < xx_cols) {
#ifndef MKSH_EBCDIC
if (UTFMODE && (c > 0x7F)) {
char utf_tmp[3];
size_t x;
if (c < 0xA0)
c = 0xFFFD;
x = utf_wctomb(utf_tmp, c);
x_putc(utf_tmp[0]);
if (x > 1)
x_putc(utf_tmp[1]);
if (x > 2)
x_putc(utf_tmp[2]);
width = utf_wcwidth(c);
} else
#endif
x_putc(c);
switch (c) {
case KSH_BEL:
break;
case '\r':
case '\n':
break;
case '\b':
x_col--;
break;
default:
x_col += width;
break;
}
}
if (x_adj_ok && (x_col < 0 || x_col >= (xx_cols - 2)))
x_adjust();
}
static void
x_e_putc3(const char **cp)
{
int width = 1, c = **(const unsigned char **)cp;
if (ctype(c, C_CR | C_LF))
x_col = 0;
if (x_col < xx_cols) {
if (UTFMODE && (c > 0x7F)) {
char *cp2;
width = utf_widthadj(*cp, (const char **)&cp2);
if (cp2 == *cp + 1) {
(*cp)++;
#ifdef MKSH_EBCDIC
x_putc(asc2rtt(0xEF));
x_putc(asc2rtt(0xBF));
x_putc(asc2rtt(0xBD));
#else
shf_puts("\xEF\xBF\xBD", shl_out);
#endif
} else
while (*cp < cp2)
x_putcf(*(*cp)++);
} else {
(*cp)++;
x_putc(c);
}
switch (c) {
case KSH_BEL:
break;
case '\r':
case '\n':
break;
case '\b':
x_col--;
break;
default:
x_col += width;
break;
}
}
if (x_adj_ok && (x_col < 0 || x_col >= (xx_cols - 2)))
x_adjust();
}
static void
x_e_puts(const char *s)
{
int adj = x_adj_done;
while (*s && adj == x_adj_done)
x_e_putc3(&s);
}
/*-
* NAME:
* x_set_arg - set an arg value for next function
*
* DESCRIPTION:
* This is a simple implementation of M-[0-9].
*
* RETURN VALUE:
* KSTD
*/
static int
x_set_arg(int c)
{
unsigned int n = 0;
bool first = true;
/* strip command prefix */
c &= 255;
while (c >= 0 && ctype(c, C_DIGIT)) {
n = n * 10 + ksh_numdig(c);
if (n > LINE)
/* upper bound for repeat */
goto x_set_arg_too_big;
c = x_e_getc();
first = false;
}
if (c < 0 || first) {
x_set_arg_too_big:
x_e_putc2(KSH_BEL);
x_arg = 1;
x_arg_defaulted = true;
} else {
x_e_ungetc(c);
x_arg = n;
x_arg_defaulted = false;
}
return (KSTD);
}
/* Comment or uncomment the current line. */
static int
x_comment(int c MKSH_A_UNUSED)
{
ssize_t len = xep - xbuf;
int ret = x_do_comment(xbuf, xend - xbuf, &len);
if (ret < 0)
x_e_putc2(KSH_BEL);
else {
x_modified();
xep = xbuf + len;
*xep = '\0';
xcp = xbp = xbuf;
x_redraw('\r');
if (ret > 0)
return (x_newline('\n'));
}
return (KSTD);
}
static int
x_version(int c MKSH_A_UNUSED)
{
char *o_xbuf = xbuf, *o_xend = xend;
char *o_xbp = xbp, *o_xep = xep, *o_xcp = xcp;
char *v;
strdupx(v, KSH_VERSION, ATEMP);
xbuf = xbp = xcp = v;
xend = xep = strnul(v);
x_redraw('\r');
x_flush();
c = x_e_getc();
xbuf = o_xbuf;
xend = o_xend;
xbp = o_xbp;
xep = o_xep;
xcp = o_xcp;
x_redraw('\r');
if (c < 0)
return (KSTD);
/* This is what AT&T ksh seems to do... Very bizarre */
if (c != ' ')
x_e_ungetc(c);
afree(v, ATEMP);
return (KSTD);
}
#ifndef MKSH_SMALL
static int
x_edit_line(int c MKSH_A_UNUSED)
{
if (x_arg_defaulted) {
if (xep == xbuf) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
if (modified) {
*xep = '\0';
histsave(&source->line, xbuf, HIST_STORE, true);
x_arg = 0;
} else
x_arg = source->line - (histptr - x_histp);
}
if (x_arg)
shf_snprintf(xbuf, xend - xbuf, Tf_sd,
"fc -e ${VISUAL:-${EDITOR:-vi}} --", x_arg);
else
strlcpy(xbuf, "fc -e ${VISUAL:-${EDITOR:-vi}} --", xend - xbuf);
xep = strnul(xbuf);
return (x_newline('\n'));
}
#endif
/*-
* NAME:
* x_prev_histword - recover word from prev command
*
* DESCRIPTION:
* This function recovers the last word from the previous
* command and inserts it into the current edit line. If a
* numeric arg is supplied then the n'th word from the
* start of the previous command is used.
* As a side effect, trashes the mark in order to achieve
* being called in a repeatable fashion.
*
* Bound to M-.
*
* RETURN VALUE:
* KSTD
*/
static int
x_prev_histword(int c MKSH_A_UNUSED)
{
char *rcp, *cp;
char **xhp;
int m = 1;
/* -1 = defaulted; 0+ = argument */
static int last_arg = -1;
if (x_last_command == XFUNC_prev_histword) {
if (xmp && modified > 1)
x_kill_region(0);
if (modified)
m = modified;
} else
last_arg = x_arg_defaulted ? -1 : x_arg;
xhp = histptr - (m - 1);
if ((xhp < history) || !(cp = *xhp)) {
x_e_putc2(KSH_BEL);
x_modified();
return (KSTD);
}
x_set_mark(0);
if ((x_arg = last_arg) == -1) {
/* x_arg_defaulted */
rcp = &cp[strlen(cp) - 1];
/*
* ignore white-space after the last word
*/
while (rcp > cp && ctype(*rcp, C_CFS))
rcp--;
while (rcp > cp && !ctype(*rcp, C_CFS))
rcp--;
if (ctype(*rcp, C_CFS))
rcp++;
x_ins(rcp);
} else {
/* not x_arg_defaulted */
char ch;
rcp = cp;
/*
* ignore white-space at start of line
*/
while (*rcp && ctype(*rcp, C_CFS))
rcp++;
while (x_arg-- > 0) {
while (*rcp && !ctype(*rcp, C_CFS))
rcp++;
while (*rcp && ctype(*rcp, C_CFS))
rcp++;
}
cp = rcp;
while (*rcp && !ctype(*rcp, C_CFS))
rcp++;
ch = *rcp;
*rcp = '\0';
x_ins(cp);
*rcp = ch;
}
if (!modified)
x_histmcp = x_histp;
modified = m + 1;
return (KSTD);
}
#ifndef MKSH_SMALL
/* Uppercase N(1) words */
static int
x_fold_upper(int c MKSH_A_UNUSED)
{
return (x_fold_case('U'));
}
/* Lowercase N(1) words */
static int
x_fold_lower(int c MKSH_A_UNUSED)
{
return (x_fold_case('L'));
}
/* Titlecase N(1) words */
static int
x_fold_capitalise(int c MKSH_A_UNUSED)
{
return (x_fold_case('C'));
}
/*-
* NAME:
* x_fold_case - convert word to UPPER/lower/Capital case
*
* DESCRIPTION:
* This function is used to implement M-U/M-u, M-L/M-l, M-C/M-c
* to UPPER CASE, lower case or Capitalise Words.
*
* RETURN VALUE:
* None
*/
static int
x_fold_case(int c)
{
char *cp = xcp;
if (cp == xep) {
x_e_putc2(KSH_BEL);
return (KSTD);
}
while (x_arg--) {
/*
* first skip over any white-space
*/
while (cp != xep && ctype(*cp, C_MFS))
cp++;
/*
* do the first char on its own since it may be
* a different action than for the rest.
*/
if (cp != xep) {
if (c == 'L')
/* lowercase */
*cp = ksh_tolower(*cp);
else
/* uppercase, capitalise */
*cp = ksh_toupper(*cp);
cp++;
}
/*
* now for the rest of the word
*/
while (cp != xep && !ctype(*cp, C_MFS)) {
if (c == 'U')
/* uppercase */
*cp = ksh_toupper(*cp);
else
/* lowercase, capitalise */
*cp = ksh_tolower(*cp);
cp++;
}
}
x_goto(cp);
x_modified();
return (KSTD);
}
#endif
/*-
* NAME:
* x_lastcp - last visible char
*
* DESCRIPTION:
* This function returns a pointer to that char in the
* edit buffer that will be the last displayed on the
* screen.
*/
static char *
x_lastcp(void)
{
if (!xlp_valid) {
int i = 0, j;
char *xlp2;
xlp = xbp;
while (xlp < xep) {
j = x_size2(xlp, &xlp2);
if ((i + j) > x_displen)
break;
i += j;
xlp = xlp2;
}
}
xlp_valid = true;
return (xlp);
}
/* correctly position the cursor on the screen from end of visible area */
static void
x_lastpos(void)
{
char *cp = x_lastcp();
while (cp > xcp)
x_bs3(&cp);
}
static void
x_mode(bool onoff)
{
static bool x_cur_mode;
if (x_cur_mode == onoff)
return;
x_cur_mode = onoff;
if (onoff) {
x_mkraw(tty_fd, NULL, false);
edchars.erase = toedchar(tty_state.c_cc[VERASE]);
edchars.kill = toedchar(tty_state.c_cc[VKILL]);
edchars.intr = toedchar(tty_state.c_cc[VINTR]);
edchars.quit = toedchar(tty_state.c_cc[VQUIT]);
edchars.eof = toedchar(tty_state.c_cc[VEOF]);
#ifdef VWERASE
edchars.werase = toedchar(tty_state.c_cc[VWERASE]);
#else
edchars.werase = 0;
#endif
if (!edchars.erase)
edchars.erase = CTRL_H;
if (!edchars.kill)
edchars.kill = CTRL_U;
if (!edchars.intr)
edchars.intr = CTRL_C;
if (!edchars.quit)
edchars.quit = CTRL_BK;
if (!edchars.eof)
edchars.eof = CTRL_D;
if (!edchars.werase)
edchars.werase = CTRL_W;
if (isedchar(edchars.erase)) {
bind_if_not_bound(0, edchars.erase, XFUNC_del_back);
bind_if_not_bound(1, edchars.erase, XFUNC_del_bword);
}
if (isedchar(edchars.kill))
bind_if_not_bound(0, edchars.kill, XFUNC_del_line);
if (isedchar(edchars.werase))
bind_if_not_bound(0, edchars.werase, XFUNC_del_bword);
if (isedchar(edchars.intr))
bind_if_not_bound(0, edchars.intr, XFUNC_abort);
if (isedchar(edchars.quit))
bind_if_not_bound(0, edchars.quit, XFUNC_noop);
} else
mksh_tcset(tty_fd, &tty_state);
}
#if !MKSH_S_NOVI
/* +++ vi editing mode +++ */
struct edstate {
char *cbuf;
ssize_t winleft;
ssize_t cbufsize;
ssize_t linelen;
ssize_t cursor;
};
static int vi_hook(int);
static int nextstate(int);
static int vi_insert(int);
static int vi_cmd(int, const char *);
static int domove(int, const char *, int);
static int domovebeg(void);
static int redo_insert(int);
static void yank_range(int, int);
static int bracktype(int);
static void save_cbuf(void);
static void restore_cbuf(void);
static int putbuf(const char *, ssize_t, bool);
static void del_range(int, int);
static int findch(int, int, bool, bool) MKSH_A_PURE;
static int forwword(int);
static int backword(int);
static int endword(int);
static int Forwword(int);
static int Backword(int);
static int Endword(int);
static int grabhist(int, int);
static int grabsearch(int, int, int, const char *);
static void redraw_line(bool);
static void refresh(int);
static int outofwin(void);
static void rewindow(void);
static int newcol(unsigned char, int);
static void display(char *, char *, int);
static void ed_mov_opt(int, char *);
static int expand_word(int);
static int complete_word(int, int);
static int print_expansions(struct edstate *, int);
static void vi_error(void);
static void vi_macro_reset(void);
static int x_vi_putbuf(const char *, size_t);
#define char_len(c) (ksh_isctrl(c) ? 2 : 1)
#define vC 0x01 /* a valid command that isn't a vM, vE, vU */
#define vM 0x02 /* movement command (h, l, etc.) */
#define vE 0x04 /* extended command (c, d, y) */
#define vX 0x08 /* long command (@, f, F, t, T, etc.) */
#define vU 0x10 /* an UN-undoable command (that isn't a vM) */
#define vB 0x20 /* bad command (^@) */
#define vZ 0x40 /* repeat count defaults to 0 (not 1) */
#define vS 0x80 /* search (/, ?) */
#define is_bad(c) (classify[rtt2asc(c) & 0x7F] & vB)
#define is_cmd(c) (classify[rtt2asc(c) & 0x7F] & (vM | vE | vC | vU))
#define is_move(c) (classify[rtt2asc(c) & 0x7F] & vM)
#define is_extend(c) (classify[rtt2asc(c) & 0x7F] & vE)
#define is_long(c) (classify[rtt2asc(c) & 0x7F] & vX)
#define is_undoable(c) (!(classify[rtt2asc(c) & 0x7F] & vU))
#define is_srch(c) (classify[rtt2asc(c) & 0x7F] & vS)
#define is_zerocount(c) (classify[rtt2asc(c) & 0x7F] & vZ)
static const unsigned char classify[128] = {
/* 0 1 2 3 4 5 6 7 */
/* 0 ^@ ^A ^B ^C ^D ^E ^F ^G */
vB, 0, 0, 0, 0, vC|vU, vC|vZ, 0,
/* 1 ^H ^I ^J ^K ^L ^M ^N ^O */
vM, vC|vZ, 0, 0, vC|vU, 0, vC, 0,
/* 2 ^P ^Q ^R ^S ^T ^U ^V ^W */
vC, 0, vC|vU, 0, 0, 0, vC, 0,
/* 3 ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
vC, 0, 0, vC|vZ, 0, 0, 0, 0,
/* 4 <space> ! " # $ % & ' */
vM, 0, 0, vC, vM, vM, 0, 0,
/* 5 ( ) * + , - . / */
0, 0, vC, vC, vM, vC, 0, vC|vS,
/* 6 0 1 2 3 4 5 6 7 */
vM, 0, 0, 0, 0, 0, 0, 0,
/* 7 8 9 : ; < = > ? */
0, 0, 0, vM, 0, vC, 0, vC|vS,
/* 8 @ A B C D E F G */
vC|vX, vC, vM, vC, vC, vM, vM|vX, vC|vU|vZ,
/* 9 H I J K L M N O */
0, vC, 0, 0, 0, 0, vC|vU, vU,
/* A P Q R S T U V W */
vC, 0, vC, vC, vM|vX, vC, 0, vM,
/* B X Y Z [ \ ] ^ _ */
vC, vC|vU, 0, vU, vC|vZ, 0, vM, vC|vZ,
/* C ` a b c d e f g */
0, vC, vM, vE, vE, vM, vM|vX, vC|vZ,
/* D h i j k l m n o */
vM, vC, vC|vU, vC|vU, vM, 0, vC|vU, 0,
/* E p q r s t u v w */
vC, 0, vX, vC, vM|vX, vC|vU, vC|vU|vZ, vM,
/* F x y z { | } ~ ^? */
vC, vE|vU, 0, 0, vM|vZ, 0, vC, 0
};
#define MAXVICMD 3
#define SRCHLEN 40
#define INSERT 1
#define REPLACE 2
#define VNORMAL 0 /* command, insert or replace mode */
#define VARG1 1 /* digit prefix (first, eg, 5l) */
#define VEXTCMD 2 /* cmd + movement (eg, cl) */
#define VARG2 3 /* digit prefix (second, eg, 2c3l) */
#define VXCH 4 /* f, F, t, T, @ */
#define VFAIL 5 /* bad command */
#define VCMD 6 /* single char command (eg, X) */
#define VREDO 7 /* . */
#define VLIT 8 /* ^V */
#define VSEARCH 9 /* /, ? */
#define VVERSION 10 /* <ESC> ^V */
#define VPREFIX2 11 /* ^[[ and ^[O in insert mode */
static struct edstate *save_edstate(struct edstate *old);
static void restore_edstate(struct edstate *old, struct edstate *news);
static void free_edstate(struct edstate *old);
static struct edstate ebuf;
static struct edstate undobuf;
static struct edstate *vs; /* current Vi editing mode state */
static struct edstate *undo;
static char *ibuf; /* input buffer */
static bool first_insert; /* set when starting in insert mode */
static int saved_inslen; /* saved inslen for first insert */
static int inslen; /* length of input buffer */
static int srchlen; /* length of current search pattern */
static char *ybuf; /* yank buffer */
static int yanklen; /* length of yank buffer */
static int fsavecmd = ' '; /* last find command */
static int fsavech; /* character to find */
static char lastcmd[MAXVICMD]; /* last non-move command */
static int lastac; /* argcnt for lastcmd */
static int lastsearch = ' '; /* last search command */
static char srchpat[SRCHLEN]; /* last search pattern */
static int insert; /* <>0 in insert mode */
static int hnum; /* position in history */
static int ohnum; /* history line copied (after mod) */
static int hlast; /* 1 past last position in history */
static int state;
/*
* Information for keeping track of macros that are being expanded.
* The format of buf is the alias contents followed by a NUL byte followed
* by the name (letter) of the alias. The end of the buffer is marked by
* a double NUL. The name of the alias is stored so recursive macros can
* be detected.
*/
struct macro_state {
unsigned char *p; /* current position in buf */
unsigned char *buf; /* pointer to macro(s) being expanded */
size_t len; /* how much data in buffer */
};
static struct macro_state macro;
/* last input was expanded */
static enum expand_mode {
NONE = 0, EXPAND, COMPLETE, PRINT
} expanded;
static int
x_vi(char *buf)
{
int c;
state = VNORMAL;
ohnum = hnum = hlast = histnum(-1) + 1;
insert = INSERT;
saved_inslen = inslen;
first_insert = true;
inslen = 0;
vi_macro_reset();
ebuf.cbuf = buf;
if (undobuf.cbuf == NULL) {
ibuf = alloc(LINE, AEDIT);
ybuf = alloc(LINE, AEDIT);
undobuf.cbuf = alloc(LINE, AEDIT);
}
undobuf.cbufsize = ebuf.cbufsize = LINE;
undobuf.linelen = ebuf.linelen = 0;
undobuf.cursor = ebuf.cursor = 0;
undobuf.winleft = ebuf.winleft = 0;
vs = &ebuf;
undo = &undobuf;
x_init_prompt(true);
x_col = pwidth;
if (wbuf_len != x_cols - 3 && ((wbuf_len = x_cols - 3))) {
wbuf[0] = aresize(wbuf[0], wbuf_len, AEDIT);
wbuf[1] = aresize(wbuf[1], wbuf_len, AEDIT);
}
if (wbuf_len) {
memset(wbuf[0], ' ', wbuf_len);
memset(wbuf[1], ' ', wbuf_len);
}
winwidth = x_cols - pwidth - 3;
win = 0;
morec = ' ';
lastref = 1;
holdlen = 0;
editmode = 2;
x_flush();
while (/* CONSTCOND */ 1) {
if (macro.p) {
c = (unsigned char)*macro.p++;
/* end of current macro? */
if (!c) {
/* more macros left to finish? */
if (*macro.p++)
continue;
/* must be the end of all the macros */
vi_macro_reset();
c = x_getc();
}
} else
c = x_getc();
if (c == -1)
break;
if (state != VLIT) {
if (isched(c, edchars.intr) ||
isched(c, edchars.quit)) {
/* shove input buffer away */
xbuf = ebuf.cbuf;
xep = xbuf;
if (ebuf.linelen > 0)
xep += ebuf.linelen;
/* pretend we got an interrupt */
x_intr(isched(c, edchars.intr) ?
SIGINT : SIGQUIT, c);
} else if (isched(c, edchars.eof) &&
state != VVERSION) {
if (vs->linelen == 0) {
x_vi_zotc(c);
c = -1;
break;
}
continue;
}
}
if (vi_hook(c))
break;
x_flush();
}
x_putc('\r');
x_putc('\n');
x_flush();
if (c == -1 || (ssize_t)LINE <= vs->linelen)
return (-1);
if (vs->cbuf != buf)
memcpy(buf, vs->cbuf, vs->linelen);
buf[vs->linelen++] = '\n';
return (vs->linelen);
}
static int
vi_hook(int ch)
{
static char curcmd[MAXVICMD], locpat[SRCHLEN];
static int cmdlen, argc1, argc2;
switch (state) {
case VNORMAL:
/* PC scancodes */
if (!ch) switch (cmdlen = 0, (ch = x_getc())) {
case 71: ch = '0'; goto pseudo_vi_command;
case 72: ch = 'k'; goto pseudo_vi_command;
case 73: ch = 'A'; goto vi_xfunc_search_up;
case 75: ch = 'h'; goto pseudo_vi_command;
case 77: ch = 'l'; goto pseudo_vi_command;
case 79: ch = '$'; goto pseudo_vi_command;
case 80: ch = 'j'; goto pseudo_vi_command;
case 83: ch = 'x'; goto pseudo_vi_command;
default: ch = 0; goto vi_insert_failed;
}
if (insert != 0) {
if (ch == CTRL_V) {
state = VLIT;
ch = '^';
}
switch (vi_insert(ch)) {
case -1:
vi_insert_failed:
vi_error();
state = VNORMAL;
break;
case 0:
if (state == VLIT) {
vs->cursor--;
refresh(0);
} else
refresh(insert != 0);
break;
case 1:
return (1);
}
} else {
if (ctype(ch, C_CR | C_LF))
return (1);
cmdlen = 0;
argc1 = 0;
if (ctype(ch, C_DIGIT) && ord(ch) != ORD('0')) {
argc1 = ksh_numdig(ch);
state = VARG1;
} else {
pseudo_vi_command:
curcmd[cmdlen++] = ch;
state = nextstate(ch);
if (state == VSEARCH) {
save_cbuf();
vs->cursor = 0;
vs->linelen = 0;
if (putbuf(ch == '/' ? "/" : "?", 1,
false) != 0)
return (-1);
refresh(0);
}
if (state == VVERSION) {
save_cbuf();
vs->cursor = 0;
vs->linelen = 0;
putbuf(KSH_VERSION,
strlen(KSH_VERSION), false);
refresh(0);
}
}
}
break;
case VLIT:
if (is_bad(ch)) {
del_range(vs->cursor, vs->cursor + 1);
vi_error();
} else
vs->cbuf[vs->cursor++] = ch;
refresh(1);
state = VNORMAL;
break;
case VVERSION:
restore_cbuf();
state = VNORMAL;
refresh(0);
break;
case VARG1:
if (ctype(ch, C_DIGIT))
argc1 = argc1 * 10 + ksh_numdig(ch);
else {
curcmd[cmdlen++] = ch;
state = nextstate(ch);
}
break;
case VEXTCMD:
argc2 = 0;
if (ctype(ch, C_DIGIT) && ord(ch) != ORD('0')) {
argc2 = ksh_numdig(ch);
state = VARG2;
return (0);
} else {
curcmd[cmdlen++] = ch;
if (ch == curcmd[0])
state = VCMD;
else if (is_move(ch))
state = nextstate(ch);
else
state = VFAIL;
}
break;
case VARG2:
if (ctype(ch, C_DIGIT))
argc2 = argc2 * 10 + ksh_numdig(ch);
else {
if (argc1 == 0)
argc1 = argc2;
else
argc1 *= argc2;
curcmd[cmdlen++] = ch;
if (ch == curcmd[0])
state = VCMD;
else if (is_move(ch))
state = nextstate(ch);
else
state = VFAIL;
}
break;
case VXCH:
if (ch == CTRL_BO)
state = VNORMAL;
else {
curcmd[cmdlen++] = ch;
state = VCMD;
}
break;
case VSEARCH:
if (ctype(ch, C_CR | C_LF) /* || ch == CTRL_BO */ ) {
restore_cbuf();
/* Repeat last search? */
if (srchlen == 0) {
if (!srchpat[0]) {
vi_error();
state = VNORMAL;
refresh(0);
return (0);
}
} else {
locpat[srchlen] = '\0';
memcpy(srchpat, locpat, srchlen + 1);
}
state = VCMD;
} else if (isched(ch, edchars.erase) || ch == CTRL_H) {
if (srchlen != 0) {
srchlen--;
vs->linelen -= char_len(locpat[srchlen]);
vs->cursor = vs->linelen;
refresh(0);
return (0);
}
restore_cbuf();
state = VNORMAL;
refresh(0);
} else if (isched(ch, edchars.kill)) {
srchlen = 0;
vs->linelen = 1;
vs->cursor = 1;
refresh(0);
return (0);
} else if (isched(ch, edchars.werase)) {
unsigned int i, n;
struct edstate new_es, *save_es;
new_es.cursor = srchlen;
new_es.cbuf = locpat;
save_es = vs;
vs = &new_es;
n = backword(1);
vs = save_es;
i = (unsigned)srchlen;
while (--i >= n)
vs->linelen -= char_len(locpat[i]);
srchlen = (int)n;
vs->cursor = vs->linelen;
refresh(0);
return (0);
} else {
if (srchlen == SRCHLEN - 1)
vi_error();
else {
locpat[srchlen++] = ch;
if (ksh_isctrl(ch)) {
if ((size_t)vs->linelen + 2 >
(size_t)vs->cbufsize)
vi_error();
vs->cbuf[vs->linelen++] = '^';
vs->cbuf[vs->linelen++] = ksh_unctrl(ch);
} else {
if (vs->linelen >= vs->cbufsize)
vi_error();
vs->cbuf[vs->linelen++] = ch;
}
vs->cursor = vs->linelen;
refresh(0);
}
return (0);
}
break;
case VPREFIX2:
vi_xfunc_search_up:
state = VFAIL;
switch (ch) {
case 'A':
/* the cursor may not be at the BOL */
if (!vs->cursor)
break;
/* nor further in the line than we can search for */
if ((size_t)vs->cursor >= sizeof(srchpat) - 1)
vs->cursor = sizeof(srchpat) - 2;
/* anchor the search pattern */
srchpat[0] = '^';
/* take the current line up to the cursor */
memmove(srchpat + 1, vs->cbuf, vs->cursor);
srchpat[vs->cursor + 1] = '\0';
/* set a magic flag */
argc1 = 2 + (int)vs->cursor;
/* and emulate a backwards history search */
lastsearch = '/';
*curcmd = 'n';
goto pseudo_VCMD;
}
break;
}
switch (state) {
case VCMD:
pseudo_VCMD:
state = VNORMAL;
switch (vi_cmd(argc1, curcmd)) {
case -1:
vi_error();
refresh(0);
break;
case 0:
if (insert != 0)
inslen = 0;
refresh(insert != 0);
break;
case 1:
refresh(0);
return (1);
case 2:
/* back from a 'v' command - don't redraw the screen */
return (1);
}
break;
case VREDO:
state = VNORMAL;
if (argc1 != 0)
lastac = argc1;
switch (vi_cmd(lastac, lastcmd)) {
case -1:
vi_error();
refresh(0);
break;
case 0:
if (insert != 0) {
if (lastcmd[0] == 's' ||
ksh_eq(lastcmd[0], 'C', 'c')) {
if (redo_insert(1) != 0)
vi_error();
} else {
if (redo_insert(lastac) != 0)
vi_error();
}
}
refresh(0);
break;
case 1:
refresh(0);
return (1);
case 2:
/* back from a 'v' command - can't happen */
break;
}
break;
case VFAIL:
state = VNORMAL;
vi_error();
break;
}
return (0);
}
static int
nextstate(int ch)
{
if (is_extend(ch))
return (VEXTCMD);
else if (is_srch(ch))
return (VSEARCH);
else if (is_long(ch))
return (VXCH);
else if (ch == '.')
return (VREDO);
else if (ch == CTRL_V)
return (VVERSION);
else if (is_cmd(ch))
return (VCMD);
else
return (VFAIL);
}
static int
vi_insert(int ch)
{
int tcursor;
if (isched(ch, edchars.erase) || ch == CTRL_H) {
if (insert == REPLACE) {
if (vs->cursor == undo->cursor) {
vi_error();
return (0);
}
if (inslen > 0)
inslen--;
vs->cursor--;
if (vs->cursor >= undo->linelen)
vs->linelen--;
else
vs->cbuf[vs->cursor] = undo->cbuf[vs->cursor];
} else {
if (vs->cursor == 0)
return (0);
if (inslen > 0)
inslen--;
vs->cursor--;
vs->linelen--;
memmove(&vs->cbuf[vs->cursor], &vs->cbuf[vs->cursor + 1],
vs->linelen - vs->cursor + 1);
}
expanded = NONE;
return (0);
}
if (isched(ch, edchars.kill)) {
if (vs->cursor != 0) {
inslen = 0;
memmove(vs->cbuf, &vs->cbuf[vs->cursor],
vs->linelen - vs->cursor);
vs->linelen -= vs->cursor;
vs->cursor = 0;
}
expanded = NONE;
return (0);
}
if (isched(ch, edchars.werase)) {
if (vs->cursor != 0) {
tcursor = backword(1);
memmove(&vs->cbuf[tcursor], &vs->cbuf[vs->cursor],
vs->linelen - vs->cursor);
vs->linelen -= vs->cursor - tcursor;
if (inslen < vs->cursor - tcursor)
inslen = 0;
else
inslen -= vs->cursor - tcursor;
vs->cursor = tcursor;
}
expanded = NONE;
return (0);
}
/*
* If any chars are entered before escape, trash the saved insert
* buffer (if user inserts & deletes char, ibuf gets trashed and
* we don't want to use it)
*/
if (first_insert && ch != CTRL_BO)
saved_inslen = 0;
switch (ch) {
case '\0':
return (-1);
case '\r':
case '\n':
return (1);
case CTRL_BO:
expanded = NONE;
if (first_insert) {
first_insert = false;
if (inslen == 0) {
inslen = saved_inslen;
return (redo_insert(0));
}
lastcmd[0] = 'a';
lastac = 1;
}
if (lastcmd[0] == 's' || ksh_eq(lastcmd[0], 'C', 'c'))
return (redo_insert(0));
else
return (redo_insert(lastac - 1));
/* { start nonstandard vi commands */
case CTRL_X:
expand_word(0);
break;
case CTRL_F:
complete_word(0, 0);
break;
case CTRL_E:
print_expansions(vs, 0);
break;
case CTRL_I:
if (Flag(FVITABCOMPLETE)) {
complete_word(0, 0);
break;
}
/* FALLTHROUGH */
/* end nonstandard vi commands } */
default:
if (vs->linelen >= vs->cbufsize - 1)
return (-1);
ibuf[inslen++] = ch;
if (insert == INSERT) {
memmove(&vs->cbuf[vs->cursor + 1], &vs->cbuf[vs->cursor],
vs->linelen - vs->cursor);
vs->linelen++;
}
vs->cbuf[vs->cursor++] = ch;
if (insert == REPLACE && vs->cursor > vs->linelen)
vs->linelen++;
expanded = NONE;
}
return (0);
}
static int
vi_cmd(int argcnt, const char *cmd)
{
int ncursor;
int cur, c1, c2, c3 = 0;
int any;
struct edstate *t;
if (argcnt == 0 && !is_zerocount(*cmd))
argcnt = 1;
if (is_move(*cmd)) {
if ((cur = domove(argcnt, cmd, 0)) >= 0) {
if (cur == vs->linelen && cur != 0)
cur--;
vs->cursor = cur;
} else
return (-1);
} else {
/* Don't save state in middle of macro.. */
if (is_undoable(*cmd) && !macro.p) {
undo->winleft = vs->winleft;
memmove(undo->cbuf, vs->cbuf, vs->linelen);
undo->linelen = vs->linelen;
undo->cursor = vs->cursor;
lastac = argcnt;
memmove(lastcmd, cmd, MAXVICMD);
}
switch (ord(*cmd)) {
case CTRL_L:
case CTRL_R:
redraw_line(true);
break;
case ORD('@'):
{
static char alias[] = "_\0";
struct tbl *ap;
size_t olen, nlen;
char *p, *nbuf;
/* lookup letter in alias list... */
alias[1] = cmd[1];
ap = ktsearch(&aliases, alias, hash(alias));
if (!cmd[1] || !ap || !(ap->flag & ISSET))
return (-1);
/* check if this is a recursive call... */
if ((p = (char *)macro.p))
while ((p = strnul(p)) && p[1])
if (*++p == cmd[1])
return (-1);
/* insert alias into macro buffer */
nlen = strlen(ap->val.s) + 1;
olen = !macro.p ? 2 :
macro.len - (macro.p - macro.buf);
/*
* at this point, it's fairly reasonable that
* nlen + olen + 2 doesn't overflow
*/
nbuf = alloc(nlen + 1 + olen, AEDIT);
memcpy(nbuf, ap->val.s, nlen);
nbuf[nlen++] = cmd[1];
if (macro.p) {
memcpy(nbuf + nlen, macro.p, olen);
afree(macro.buf, AEDIT);
nlen += olen;
} else {
nbuf[nlen++] = '\0';
nbuf[nlen++] = '\0';
}
macro.p = macro.buf = (unsigned char *)nbuf;
macro.len = nlen;
}
break;
case ORD('a'):
modified = 1;
hnum = hlast;
if (vs->linelen != 0)
vs->cursor++;
insert = INSERT;
break;
case ORD('A'):
modified = 1;
hnum = hlast;
del_range(0, 0);
vs->cursor = vs->linelen;
insert = INSERT;
break;
case ORD('S'):
vs->cursor = domovebeg();
del_range(vs->cursor, vs->linelen);
modified = 1;
hnum = hlast;
insert = INSERT;
break;
case ORD('Y'):
cmd = "y$";
/* ahhhhhh... */
/* FALLTHROUGH */
case ORD('c'):
case ORD('d'):
case ORD('y'):
if (*cmd == cmd[1]) {
c1 = *cmd == 'c' ? domovebeg() : 0;
c2 = vs->linelen;
} else if (!is_move(cmd[1]))
return (-1);
else {
if ((ncursor = domove(argcnt, &cmd[1], 1)) < 0)
return (-1);
if (*cmd == 'c' && ksh_eq(cmd[1], 'W', 'w') &&
!ctype(vs->cbuf[vs->cursor], C_SPACE)) {
do {
--ncursor;
} while (ctype(vs->cbuf[ncursor], C_SPACE));
ncursor++;
}
if (ncursor > vs->cursor) {
c1 = vs->cursor;
c2 = ncursor;
} else {
c1 = ncursor;
c2 = vs->cursor;
if (cmd[1] == '%')
c2++;
}
}
if (*cmd != 'c' && c1 != c2)
yank_range(c1, c2);
if (*cmd != 'y') {
del_range(c1, c2);
vs->cursor = c1;
}
if (*cmd == 'c') {
modified = 1;
hnum = hlast;
insert = INSERT;
}
break;
case ORD('p'):
modified = 1;
hnum = hlast;
if (vs->linelen != 0)
vs->cursor++;
while (putbuf(ybuf, yanklen, false) == 0 &&
--argcnt > 0)
;
if (vs->cursor != 0)
vs->cursor--;
if (argcnt != 0)
return (-1);
break;
case ORD('P'):
modified = 1;
hnum = hlast;
any = 0;
while (putbuf(ybuf, yanklen, false) == 0 &&
--argcnt > 0)
any = 1;
if (any && vs->cursor != 0)
vs->cursor--;
if (argcnt != 0)
return (-1);
break;
case ORD('C'):
modified = 1;
hnum = hlast;
del_range(vs->cursor, vs->linelen);
insert = INSERT;
break;
case ORD('D'):
yank_range(vs->cursor, vs->linelen);
del_range(vs->cursor, vs->linelen);
if (vs->cursor != 0)
vs->cursor--;
break;
case ORD('g'):
if (!argcnt)
argcnt = hlast;
/* FALLTHROUGH */
case ORD('G'):
if (!argcnt)
argcnt = 1;
else
argcnt = hlast - (source->line - argcnt);
if (grabhist(modified, argcnt - 1) < 0)
return (-1);
else {
modified = 0;
hnum = argcnt - 1;
}
break;
case ORD('i'):
modified = 1;
hnum = hlast;
insert = INSERT;
break;
case ORD('I'):
modified = 1;
hnum = hlast;
vs->cursor = domovebeg();
insert = INSERT;
break;
case ORD('j'):
case ORD('+'):
case CTRL_N:
if (grabhist(modified, hnum + argcnt) < 0)
return (-1);
else {
modified = 0;
hnum += argcnt;
}
break;
case ORD('k'):
case ORD('-'):
case CTRL_P:
if (grabhist(modified, hnum - argcnt) < 0)
return (-1);
else {
modified = 0;
hnum -= argcnt;
}
break;
case ORD('r'):
if (vs->linelen == 0)
return (-1);
modified = 1;
hnum = hlast;
if (cmd[1] == 0)
vi_error();
else {
int n;
if (vs->cursor + argcnt > vs->linelen)
return (-1);
for (n = 0; n < argcnt; ++n)
vs->cbuf[vs->cursor + n] = cmd[1];
vs->cursor += n - 1;
}
break;
case ORD('R'):
modified = 1;
hnum = hlast;
insert = REPLACE;
break;
case ORD('s'):
if (vs->linelen == 0)
return (-1);
modified = 1;
hnum = hlast;
if (vs->cursor + argcnt > vs->linelen)
argcnt = vs->linelen - vs->cursor;
del_range(vs->cursor, vs->cursor + argcnt);
insert = INSERT;
break;
case ORD('v'):
if (!argcnt) {
if (vs->linelen == 0)
return (-1);
if (modified) {
vs->cbuf[vs->linelen] = '\0';
histsave(&source->line, vs->cbuf,
HIST_STORE, true);
} else
argcnt = source->line + 1 -
(hlast - hnum);
}
if (argcnt)
shf_snprintf(vs->cbuf, vs->cbufsize, Tf_sd,
"fc -e ${VISUAL:-${EDITOR:-vi}} --",
argcnt);
else
strlcpy(vs->cbuf,
"fc -e ${VISUAL:-${EDITOR:-vi}} --",
vs->cbufsize);
vs->linelen = strlen(vs->cbuf);
return (2);
case ORD('x'):
if (vs->linelen == 0)
return (-1);
modified = 1;
hnum = hlast;
if (vs->cursor + argcnt > vs->linelen)
argcnt = vs->linelen - vs->cursor;
yank_range(vs->cursor, vs->cursor + argcnt);
del_range(vs->cursor, vs->cursor + argcnt);
break;
case ORD('X'):
if (vs->cursor > 0) {
modified = 1;
hnum = hlast;
if (vs->cursor < argcnt)
argcnt = vs->cursor;
yank_range(vs->cursor - argcnt, vs->cursor);
del_range(vs->cursor - argcnt, vs->cursor);
vs->cursor -= argcnt;
} else
return (-1);
break;
case ORD('u'):
t = vs;
vs = undo;
undo = t;
break;
case ORD('U'):
if (!modified)
return (-1);
if (grabhist(modified, ohnum) < 0)
return (-1);
modified = 0;
hnum = ohnum;
break;
case ORD('?'):
if (hnum == hlast)
hnum = -1;
/* ahhh */
/* FALLTHROUGH */
case ORD('/'):
c3 = 1;
srchlen = 0;
lastsearch = *cmd;
/* FALLTHROUGH */
case ORD('n'):
case ORD('N'):
if (lastsearch == ' ')
return (-1);
if (lastsearch == '?')
c1 = 1;
else
c1 = 0;
if (*cmd == 'N')
c1 = !c1;
if ((c2 = grabsearch(modified, hnum,
c1, srchpat)) < 0) {
if (c3) {
restore_cbuf();
refresh(0);
}
return (-1);
} else {
modified = 0;
hnum = c2;
ohnum = hnum;
}
if (argcnt >= 2) {
/* flag from cursor-up command */
vs->cursor = argcnt - 2;
return (0);
}
break;
case ORD('_'):
{
bool inspace;
char *p, *sp;
if (histnum(-1) < 0)
return (-1);
p = *histpos();
if (argcnt) {
while (ctype(*p, C_SPACE))
p++;
while (*p && --argcnt) {
while (*p && !ctype(*p, C_SPACE))
p++;
while (ctype(*p, C_SPACE))
p++;
}
if (!*p)
return (-1);
sp = p;
} else {
sp = p;
inspace = false;
while (*p) {
if (ctype(*p, C_SPACE))
inspace = true;
else if (inspace) {
inspace = false;
sp = p;
}
p++;
}
p = sp;
}
modified = 1;
hnum = hlast;
if (vs->cursor != vs->linelen)
vs->cursor++;
while (*p && !ctype(*p, C_SPACE)) {
argcnt++;
p++;
}
if (putbuf(T1space, 1, false) != 0 ||
putbuf(sp, argcnt, false) != 0) {
if (vs->cursor != 0)
vs->cursor--;
return (-1);
}
insert = INSERT;
}
break;
case ORD('~'):
{
char *p;
int i;
if (vs->linelen == 0)
return (-1);
for (i = 0; i < argcnt; i++) {
p = &vs->cbuf[vs->cursor];
if (ctype(*p, C_LOWER)) {
modified = 1;
hnum = hlast;
*p = ksh_toupper(*p);
} else if (ctype(*p, C_UPPER)) {
modified = 1;
hnum = hlast;
*p = ksh_tolower(*p);
}
if (vs->cursor < vs->linelen - 1)
vs->cursor++;
}
break;
}
case ORD('#'):
{
int ret = x_do_comment(vs->cbuf, vs->cbufsize,
&vs->linelen);
if (ret >= 0)
vs->cursor = 0;
return (ret);
}
/* AT&T ksh */
case ORD('='):
/* Nonstandard vi/ksh */
case CTRL_E:
print_expansions(vs, 1);
break;
/* Nonstandard vi/ksh */
case CTRL_I:
if (!Flag(FVITABCOMPLETE))
return (-1);
complete_word(1, argcnt);
break;
/* some annoying AT&T kshs */
case CTRL_BO:
if (!Flag(FVIESCCOMPLETE))
return (-1);
/* FALLTHROUGH */
/* AT&T ksh */
case ORD('\\'):
/* Nonstandard vi/ksh */
case CTRL_F:
complete_word(1, argcnt);
break;
/* AT&T ksh */
case ORD('*'):
/* Nonstandard vi/ksh */
case CTRL_X:
expand_word(1);
break;
/* mksh: cursor movement */
case ORD('['):
case ORD('O'):
state = VPREFIX2;
if (vs->linelen != 0)
vs->cursor++;
insert = INSERT;
return (0);
}
if (insert == 0 && vs->cursor != 0 && vs->cursor >= vs->linelen)
vs->cursor--;
}
return (0);
}
static int
domove(int argcnt, const char *cmd, int sub)
{
int ncursor = 0, i = 0, t;
unsigned int bcount;
switch (ord(*cmd)) {
case ORD('b'):
if (!sub && vs->cursor == 0)
return (-1);
ncursor = backword(argcnt);
break;
case ORD('B'):
if (!sub && vs->cursor == 0)
return (-1);
ncursor = Backword(argcnt);
break;
case ORD('e'):
if (!sub && vs->cursor + 1 >= vs->linelen)
return (-1);
ncursor = endword(argcnt);
if (sub && ncursor < vs->linelen)
ncursor++;
break;
case ORD('E'):
if (!sub && vs->cursor + 1 >= vs->linelen)
return (-1);
ncursor = Endword(argcnt);
if (sub && ncursor < vs->linelen)
ncursor++;
break;
case ORD('f'):
case ORD('F'):
case ORD('t'):
case ORD('T'):
fsavecmd = *cmd;
fsavech = cmd[1];
/* FALLTHROUGH */
case ORD(','):
case ORD(';'):
if (fsavecmd == ' ')
return (-1);
i = ksh_eq(fsavecmd, 'F', 'f');
t = fsavecmd > 'a';
if (*cmd == ',')
t = !t;
if ((ncursor = findch(fsavech, argcnt, tobool(t),
tobool(i))) < 0)
return (-1);
if (sub && t)
ncursor++;
break;
case ORD('h'):
case CTRL_H:
if (!sub && vs->cursor == 0)
return (-1);
ncursor = vs->cursor - argcnt;
if (ncursor < 0)
ncursor = 0;
break;
case ORD(' '):
case ORD('l'):
if (!sub && vs->cursor + 1 >= vs->linelen)
return (-1);
if (vs->linelen != 0) {
ncursor = vs->cursor + argcnt;
if (ncursor > vs->linelen)
ncursor = vs->linelen;
}
break;
case ORD('w'):
if (!sub && vs->cursor + 1 >= vs->linelen)
return (-1);
ncursor = forwword(argcnt);
break;
case ORD('W'):
if (!sub && vs->cursor + 1 >= vs->linelen)
return (-1);
ncursor = Forwword(argcnt);
break;
case ORD('0'):
ncursor = 0;
break;
case ORD('^'):
ncursor = domovebeg();
break;
case ORD('|'):
ncursor = argcnt;
if (ncursor > vs->linelen)
ncursor = vs->linelen;
if (ncursor)
ncursor--;
break;
case ORD('$'):
if (vs->linelen != 0)
ncursor = vs->linelen;
else
ncursor = 0;
break;
case ORD('%'):
ncursor = vs->cursor;
while (ncursor < vs->linelen &&
(i = bracktype(vs->cbuf[ncursor])) == 0)
ncursor++;
if (ncursor == vs->linelen)
return (-1);
bcount = 1;
do {
if (i > 0) {
if (++ncursor >= vs->linelen)
return (-1);
} else {
if (--ncursor < 0)
return (-1);
}
t = bracktype(vs->cbuf[ncursor]);
if (t == i)
bcount++;
else if (t == -i)
bcount--;
} while (bcount != 0);
if (sub && i > 0)
ncursor++;
break;
default:
return (-1);
}
return (ncursor);
}
static int
domovebeg(void)
{
int ncursor = 0;
while (ncursor < vs->linelen - 1 &&
ctype(vs->cbuf[ncursor], C_SPACE))
ncursor++;
return (ncursor);
}
static int
redo_insert(int count)
{
while (count-- > 0)
if (putbuf(ibuf, inslen, tobool(insert == REPLACE)) != 0)
return (-1);
if (vs->cursor > 0)
vs->cursor--;
insert = 0;
return (0);
}
static void
yank_range(int a, int b)
{
yanklen = b - a;
if (yanklen != 0)
memmove(ybuf, &vs->cbuf[a], yanklen);
}
static int
bracktype(int ch)
{
switch (ord(ch)) {
case ORD('('):
return (1);
case ORD('['):
return (2);
case ORD('{'):
return (3);
case ORD(')'):
return (-1);
case ORD(']'):
return (-2);
case ORD('}'):
return (-3);
default:
return (0);
}
}
/*
* Non user interface editor routines below here
*/
static void
save_cbuf(void)
{
memmove(holdbufp, vs->cbuf, vs->linelen);
holdlen = vs->linelen;
holdbufp[holdlen] = '\0';
}
static void
restore_cbuf(void)
{
vs->cursor = 0;
vs->linelen = holdlen;
memmove(vs->cbuf, holdbufp, holdlen);
}
/* return a new edstate */
static struct edstate *
save_edstate(struct edstate *old)
{
struct edstate *news;
news = alloc(sizeof(struct edstate), AEDIT);
news->cbuf = alloc(old->cbufsize, AEDIT);
memcpy(news->cbuf, old->cbuf, old->linelen);
news->cbufsize = old->cbufsize;
news->linelen = old->linelen;
news->cursor = old->cursor;
news->winleft = old->winleft;
return (news);
}
static void
restore_edstate(struct edstate *news, struct edstate *old)
{
memcpy(news->cbuf, old->cbuf, old->linelen);
news->linelen = old->linelen;
news->cursor = old->cursor;
news->winleft = old->winleft;
free_edstate(old);
}
static void
free_edstate(struct edstate *old)
{
afree(old->cbuf, AEDIT);
afree(old, AEDIT);
}
/*
* this is used for calling x_escape() in complete_word()
*/
static int
x_vi_putbuf(const char *s, size_t len)
{
return (putbuf(s, len, false));
}
static int
putbuf(const char *buf, ssize_t len, bool repl)
{
if (len == 0)
return (0);
if (repl) {
if (vs->cursor + len >= vs->cbufsize)
return (-1);
if (vs->cursor + len > vs->linelen)
vs->linelen = vs->cursor + len;
} else {
if (vs->linelen + len >= vs->cbufsize)
return (-1);
memmove(&vs->cbuf[vs->cursor + len], &vs->cbuf[vs->cursor],
vs->linelen - vs->cursor);
vs->linelen += len;
}
memmove(&vs->cbuf[vs->cursor], buf, len);
vs->cursor += len;
return (0);
}
static void
del_range(int a, int b)
{
if (vs->linelen != b)
memmove(&vs->cbuf[a], &vs->cbuf[b], vs->linelen - b);
vs->linelen -= b - a;
}
static int
findch(int ch, int cnt, bool forw, bool incl)
{
int ncursor;
if (vs->linelen == 0)
return (-1);
ncursor = vs->cursor;
while (cnt--) {
do {
if (forw) {
if (++ncursor == vs->linelen)
return (-1);
} else {
if (--ncursor < 0)
return (-1);
}
} while (vs->cbuf[ncursor] != ch);
}
if (!incl) {
if (forw)
ncursor--;
else
ncursor++;
}
return (ncursor);
}
static int
forwword(int argcnt)
{
int ncursor;
ncursor = vs->cursor;
while (ncursor < vs->linelen && argcnt--) {
if (ctype(vs->cbuf[ncursor], C_ALNUX))
while (ncursor < vs->linelen &&
ctype(vs->cbuf[ncursor], C_ALNUX))
ncursor++;
else if (!ctype(vs->cbuf[ncursor], C_SPACE))
while (ncursor < vs->linelen &&
!ctype(vs->cbuf[ncursor], C_ALNUX | C_SPACE))
ncursor++;
while (ncursor < vs->linelen &&
ctype(vs->cbuf[ncursor], C_SPACE))
ncursor++;
}
return (ncursor);
}
static int
backword(int argcnt)
{
int ncursor;
ncursor = vs->cursor;
while (ncursor > 0 && argcnt--) {
while (--ncursor > 0 && ctype(vs->cbuf[ncursor], C_SPACE))
;
if (ncursor > 0) {
if (ctype(vs->cbuf[ncursor], C_ALNUX))
while (--ncursor >= 0 &&
ctype(vs->cbuf[ncursor], C_ALNUX))
;
else
while (--ncursor >= 0 &&
!ctype(vs->cbuf[ncursor], C_ALNUX | C_SPACE))
;
ncursor++;
}
}
return (ncursor);
}
static int
endword(int argcnt)
{
int ncursor;
ncursor = vs->cursor;
while (ncursor < vs->linelen && argcnt--) {
while (++ncursor < vs->linelen - 1 &&
ctype(vs->cbuf[ncursor], C_SPACE))
;
if (ncursor < vs->linelen - 1) {
if (ctype(vs->cbuf[ncursor], C_ALNUX))
while (++ncursor < vs->linelen &&
ctype(vs->cbuf[ncursor], C_ALNUX))
;
else
while (++ncursor < vs->linelen &&
!ctype(vs->cbuf[ncursor], C_ALNUX | C_SPACE))
;
ncursor--;
}
}
return (ncursor);
}
static int
Forwword(int argcnt)
{
int ncursor;
ncursor = vs->cursor;
while (ncursor < vs->linelen && argcnt--) {
while (ncursor < vs->linelen &&
!ctype(vs->cbuf[ncursor], C_SPACE))
ncursor++;
while (ncursor < vs->linelen &&
ctype(vs->cbuf[ncursor], C_SPACE))
ncursor++;
}
return (ncursor);
}
static int
Backword(int argcnt)
{
int ncursor;
ncursor = vs->cursor;
while (ncursor > 0 && argcnt--) {
while (--ncursor >= 0 && ctype(vs->cbuf[ncursor], C_SPACE))
;
while (ncursor >= 0 && !ctype(vs->cbuf[ncursor], C_SPACE))
ncursor--;
ncursor++;
}
return (ncursor);
}
static int
Endword(int argcnt)
{
int ncursor;
ncursor = vs->cursor;
while (ncursor < vs->linelen - 1 && argcnt--) {
while (++ncursor < vs->linelen - 1 &&
ctype(vs->cbuf[ncursor], C_SPACE))
;
if (ncursor < vs->linelen - 1) {
while (++ncursor < vs->linelen &&
!ctype(vs->cbuf[ncursor], C_SPACE))
;
ncursor--;
}
}
return (ncursor);
}
static int
grabhist(int save, int n)
{
char *hptr;
if (n < 0 || n > hlast)
return (-1);
if (n == hlast) {
restore_cbuf();
ohnum = n;
return (0);
}
(void)histnum(n);
if ((hptr = *histpos()) == NULL) {
internal_warningf("grabhist: bad history array");
return (-1);
}
if (save)
save_cbuf();
if ((vs->linelen = strlen(hptr)) >= vs->cbufsize)
vs->linelen = vs->cbufsize - 1;
memmove(vs->cbuf, hptr, vs->linelen);
vs->cursor = 0;
ohnum = n;
return (0);
}
static int
grabsearch(int save, int start, int fwd, const char *pat)
{
char *hptr;
int hist;
bool anchored;
if ((start == 0 && fwd == 0) || (start >= hlast - 1 && fwd == 1))
return (-1);
if (fwd)
start++;
else
start--;
anchored = *pat == '^' ? (++pat, true) : false;
if ((hist = findhist(start, fwd, pat, anchored)) < 0) {
/* (start != 0 && fwd && match(holdbufp, pat) >= 0) */
if (start != 0 && fwd && strcmp(holdbufp, pat) >= 0) {
restore_cbuf();
return (0);
} else
return (-1);
}
if (save)
save_cbuf();
histnum(hist);
hptr = *histpos();
if ((vs->linelen = strlen(hptr)) >= vs->cbufsize)
vs->linelen = vs->cbufsize - 1;
memmove(vs->cbuf, hptr, vs->linelen);
vs->cursor = 0;
return (hist);
}
static void
redraw_line(bool newl)
{
if (wbuf_len)
memset(wbuf[win], ' ', wbuf_len);
if (newl) {
x_putc('\r');
x_putc('\n');
}
x_pprompt();
morec = ' ';
}
static void
refresh(int leftside)
{
if (leftside < 0)
leftside = lastref;
else
lastref = leftside;
if (outofwin())
rewindow();
display(wbuf[1 - win], wbuf[win], leftside);
win = 1 - win;
}
static int
outofwin(void)
{
int cur, col;
if (vs->cursor < vs->winleft)
return (1);
col = 0;
cur = vs->winleft;
while (cur < vs->cursor)
col = newcol((unsigned char)vs->cbuf[cur++], col);
if (col >= winwidth)
return (1);
return (0);
}
static void
rewindow(void)
{
int tcur, tcol;
int holdcur1, holdcol1;
int holdcur2, holdcol2;
holdcur1 = holdcur2 = tcur = 0;
holdcol1 = holdcol2 = tcol = 0;
while (tcur < vs->cursor) {
if (tcol - holdcol2 > winwidth / 2) {
holdcur1 = holdcur2;
holdcol1 = holdcol2;
holdcur2 = tcur;
holdcol2 = tcol;
}
tcol = newcol((unsigned char)vs->cbuf[tcur++], tcol);
}
while (tcol - holdcol1 > winwidth / 2)
holdcol1 = newcol((unsigned char)vs->cbuf[holdcur1++],
holdcol1);
vs->winleft = holdcur1;
}
static int
newcol(unsigned char ch, int col)
{
if (ch == '\t')
return ((col | 7) + 1);
return (col + char_len(ch));
}
static void
display(char *wb1, char *wb2, int leftside)
{
unsigned char ch;
char *twb1, *twb2, mc;
int cur, col, cnt;
int ncol = 0;
int moreright;
col = 0;
cur = vs->winleft;
moreright = 0;
twb1 = wb1;
while (col < winwidth && cur < vs->linelen) {
if (cur == vs->cursor && leftside)
ncol = col + pwidth;
if ((ch = vs->cbuf[cur]) == '\t')
do {
*twb1++ = ' ';
} while (++col < winwidth && (col & 7) != 0);
else if (col < winwidth) {
if (ksh_isctrl(ch)) {
*twb1++ = '^';
if (++col < winwidth) {
*twb1++ = ksh_unctrl(ch);
col++;
}
} else {
*twb1++ = ch;
col++;
}
}
if (cur == vs->cursor && !leftside)
ncol = col + pwidth - 1;
cur++;
}
if (cur == vs->cursor)
ncol = col + pwidth;
if (col < winwidth) {
while (col < winwidth) {
*twb1++ = ' ';
col++;
}
} else
moreright++;
*twb1 = ' ';
col = pwidth;
cnt = winwidth;
twb1 = wb1;
twb2 = wb2;
while (cnt--) {
if (*twb1 != *twb2) {
if (x_col != col)
ed_mov_opt(col, wb1);
x_putc(*twb1);
x_col++;
}
twb1++;
twb2++;
col++;
}
if (vs->winleft > 0 && moreright)
/*
* POSIX says to use * for this but that is a globbing
* character and may confuse people; + is more innocuous
*/
mc = '+';
else if (vs->winleft > 0)
mc = '<';
else if (moreright)
mc = '>';
else
mc = ' ';
if (mc != morec) {
ed_mov_opt(pwidth + winwidth + 1, wb1);
x_putc(mc);
x_col++;
morec = mc;
}
if (x_col != ncol)
ed_mov_opt(ncol, wb1);
}
static void
ed_mov_opt(int col, char *wb)
{
if (col < x_col) {
if (col + 1 < x_col - col) {
x_putc('\r');
x_pprompt();
while (x_col++ < col)
x_putcf(*wb++);
} else {
while (x_col-- > col)
x_putc('\b');
}
} else {
wb = &wb[x_col - pwidth];
while (x_col++ < col)
x_putcf(*wb++);
}
x_col = col;
}
/* replace word with all expansions (ie, expand word*) */
static int
expand_word(int cmd)
{
static struct edstate *buf;
int rval = 0, nwords, start, end, i;
char **words;
/* Undo previous expansion */
if (cmd == 0 && expanded == EXPAND && buf) {
restore_edstate(vs, buf);
buf = 0;
expanded = NONE;
return (0);
}
if (buf) {
free_edstate(buf);
buf = 0;
}
i = XCF_COMMAND_FILE | XCF_FULLPATH;
nwords = x_cf_glob(&i, vs->cbuf, vs->linelen, vs->cursor,
&start, &end, &words);
if (nwords == 0) {
vi_error();
return (-1);
}
buf = save_edstate(vs);
expanded = EXPAND;
del_range(start, end);
vs->cursor = start;
i = 0;
while (i < nwords) {
if (x_escape(words[i], strlen(words[i]), x_vi_putbuf) != 0) {
rval = -1;
break;
}
if (++i < nwords && putbuf(T1space, 1, false) != 0) {
rval = -1;
break;
}
}
i = buf->cursor - end;
if (rval == 0 && i > 0)
vs->cursor += i;
modified = 1;
hnum = hlast;
insert = INSERT;
lastac = 0;
refresh(0);
return (rval);
}
static int
complete_word(int cmd, int count)
{
static struct edstate *buf;
int rval, nwords, start, end, flags;
size_t match_len;
char **words;
char *match;
bool is_unique;
/* Undo previous completion */
if (cmd == 0 && expanded == COMPLETE && buf) {
print_expansions(buf, 0);
expanded = PRINT;
return (0);
}
if (cmd == 0 && expanded == PRINT && buf) {
restore_edstate(vs, buf);
buf = 0;
expanded = NONE;
return (0);
}
if (buf) {
free_edstate(buf);
buf = 0;
}
/*
* XCF_FULLPATH for count 'cause the menu printed by
* print_expansions() was done this way.
*/
flags = XCF_COMMAND_FILE;
if (count)
flags |= XCF_FULLPATH;
nwords = x_cf_glob(&flags, vs->cbuf, vs->linelen, vs->cursor,
&start, &end, &words);
if (nwords == 0) {
vi_error();
return (-1);
}
if (count) {
int i;
count--;
if (count >= nwords) {
vi_error();
x_print_expansions(nwords, words,
tobool(flags & XCF_IS_COMMAND));
x_free_words(nwords, words);
redraw_line(false);
return (-1);
}
/*
* Expand the count'th word to its basename
*/
if (flags & XCF_IS_COMMAND) {
match = words[count] +
x_basename(words[count], NULL);
/* If more than one possible match, use full path */
for (i = 0; i < nwords; i++)
if (i != count &&
strcmp(words[i] + x_basename(words[i],
NULL), match) == 0) {
match = words[count];
break;
}
} else
match = words[count];
match_len = strlen(match);
is_unique = true;
/* expanded = PRINT; next call undo */
} else {
match = words[0];
match_len = x_longest_prefix(nwords, words);
/* next call will list completions */
expanded = COMPLETE;
is_unique = nwords == 1;
}
buf = save_edstate(vs);
del_range(start, end);
vs->cursor = start;
/*
* escape all shell-sensitive characters and put the result into
* command buffer
*/
rval = x_escape(match, match_len, x_vi_putbuf);
if (rval == 0 && is_unique) {
/*
* If exact match, don't undo. Allows directory completions
* to be used (ie, complete the next portion of the path).
*/
expanded = NONE;
/*
* append a space if this is a non-directory match
* and not a parameter or homedir substitution
*/
if (match_len > 0 && !mksh_cdirsep(match[match_len - 1]) &&
!(flags & XCF_IS_NOSPACE))
rval = putbuf(T1space, 1, false);
}
x_free_words(nwords, words);
modified = 1;
hnum = hlast;
insert = INSERT;
/* prevent this from being redone... */
lastac = 0;
refresh(0);
return (rval);
}
static int
print_expansions(struct edstate *est, int cmd MKSH_A_UNUSED)
{
int start, end, nwords, i;
char **words;
i = XCF_COMMAND_FILE | XCF_FULLPATH;
nwords = x_cf_glob(&i, est->cbuf, est->linelen, est->cursor,
&start, &end, &words);
if (nwords == 0) {
vi_error();
return (-1);
}
x_print_expansions(nwords, words, tobool(i & XCF_IS_COMMAND));
x_free_words(nwords, words);
redraw_line(false);
return (0);
}
#endif /* !MKSH_S_NOVI */
/* Similar to x_zotc(emacs.c), but no tab weirdness */
static void
x_vi_zotc(int c)
{
if (ksh_isctrl(c)) {
x_putc('^');
c = ksh_unctrl(c);
}
x_putc(c);
}
#if !MKSH_S_NOVI
static void
vi_error(void)
{
/* Beem out of any macros as soon as an error occurs */
vi_macro_reset();
x_putc(KSH_BEL);
x_flush();
}
static void
vi_macro_reset(void)
{
if (macro.p) {
afree(macro.buf, AEDIT);
memset((char *)¯o, 0, sizeof(macro));
}
}
#endif /* !MKSH_S_NOVI */
/* called from main.c */
void
x_init(void)
{
int i, j;
/*
* set edchars to force initial binding, except we need
* default values for ^W for some deficient systems…
*/
edchars.erase = edchars.kill = edchars.intr = edchars.quit =
edchars.eof = EDCHAR_INITIAL;
edchars.werase = 027;
/* command line editing specific memory allocation */
ainit(AEDIT);
holdbufp = alloc(LINE, AEDIT);
/* initialise Emacs command line editing mode */
x_nextcmd = -1;
x_tab = alloc2(X_NTABS, sizeof(*x_tab), AEDIT);
for (j = 0; j < X_TABSZ; j++)
x_tab[0][j] = XFUNC_insert;
for (i = 1; i < X_NTABS; i++)
for (j = 0; j < X_TABSZ; j++)
x_tab[i][j] = XFUNC_error;
for (i = 0; i < (int)NELEM(x_defbindings); i++)
x_tab[x_defbindings[i].xdb_tab][x_defbindings[i].xdb_char]
= x_defbindings[i].xdb_func;
#ifndef MKSH_SMALL
x_atab = alloc2(X_NTABS, sizeof(*x_atab), AEDIT);
for (i = 1; i < X_NTABS; i++)
for (j = 0; j < X_TABSZ; j++)
x_atab[i][j] = NULL;
#endif
}
#ifdef DEBUG_LEAKS
void
x_done(void)
{
if (x_tab != NULL)
afreeall(AEDIT);
}
#endif
void
x_initterm(const char *termtype)
{
/* default must be 0 (bss) */
x_term_mode = 0;
/* this is what tmux uses, don't ask me about it */
if (!strcmp(termtype, "screen") || !strncmp(termtype, "screen-", 7))
x_term_mode = 1;
}
#ifndef MKSH_SMALL
static char *
x_eval_region_helper(const char *cmd, size_t len)
{
char * volatile cp;
newenv(E_ERRH);
if (!kshsetjmp(e->jbuf)) {
char *wds = alloc(len + 3, ATEMP);
wds[0] = FUNASUB;
memcpy(wds + 1, cmd, len);
wds[len + 1] = '\0';
wds[len + 2] = EOS;
cp = evalstr(wds, DOSCALAR);
afree(wds, ATEMP);
strdupx(cp, cp, AEDIT);
} else
cp = NULL;
quitenv(NULL);
return (cp);
}
static int
x_eval_region(int c MKSH_A_UNUSED)
{
char *evbeg, *evend, *cp;
size_t newlen;
/* only for LINE overflow checking */
size_t restlen;
if (xmp == NULL) {
evbeg = xbuf;
evend = xep;
} else if (xmp < xcp) {
evbeg = xmp;
evend = xcp;
} else {
evbeg = xcp;
evend = xmp;
}
x_e_putc2('\r');
x_clrtoeol(' ', false);
x_flush();
x_mode(false);
cp = x_eval_region_helper(evbeg, evend - evbeg);
x_mode(true);
if (cp == NULL) {
/* command cannot be parsed */
x_eval_region_err:
x_e_putc2(KSH_BEL);
x_redraw('\r');
return (KSTD);
}
newlen = strlen(cp);
restlen = xep - evend;
/* check for LINE overflow, until this is dynamically allocated */
if (evbeg + newlen + restlen >= xend)
goto x_eval_region_err;
xmp = evbeg;
xcp = evbeg + newlen;
xep = xcp + restlen;
memmove(xcp, evend, restlen + /* NUL */ 1);
memcpy(xmp, cp, newlen);
afree(cp, AEDIT);
x_adjust();
x_modified();
return (KSTD);
}
#endif /* !MKSH_SMALL */
#endif /* !MKSH_NO_CMDLINE_EDITING */