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mksh/edit.c
tg 95cfad6339 * only have one $MirOS RCS ID per file to shrink source size 
(this is an exception from normal use)
* bump to R26
2005-11-22 18:40:44 +00:00

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/* $OpenBSD: edit.c,v 1.30 2005/09/11 18:08:47 otto Exp $ */
/* $OpenBSD: edit.h,v 1.8 2005/03/28 21:28:22 deraadt Exp $ */
/* $OpenBSD: emacs.c,v 1.39 2005/09/26 19:25:22 otto Exp $ */
/* $OpenBSD: vi.c,v 1.21 2005/03/30 17:16:37 deraadt Exp $ */
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/edit.c,v 1.17 2005/11/22 18:40:41 tg Exp $");
/* tty driver characters we are interested in */
typedef struct {
int erase;
int kill;
int werase;
int intr;
int quit;
int eof;
} X_chars;
X_chars edchars;
/* x_fc_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)
int x_getc(void);
void x_flush(void);
void x_putc(int);
void x_puts(const char *);
bool x_mode(bool);
int promptlen(const char *, const char **);
int x_do_comment(char *, int, int *);
void x_print_expansions(int, char *const *, int);
int x_cf_glob(int, const char *, int, int, int *, int *, char ***, int *);
int x_longest_prefix(int, char *const *);
int x_basename(const char *, const char *);
void x_free_words(int, char **);
int x_escape(const char *, size_t, int (*) (const char *, size_t));
int x_emacs(char *, size_t);
void x_init_emacs(void);
void x_emacs_keys(X_chars *);
int x_vi(char *, size_t);
static void x_sigwinch(int);
static volatile sig_atomic_t got_sigwinch;
static void check_sigwinch(void);
static int x_file_glob(int, const char *, int, char ***);
static int x_command_glob(int, const char *, int, char ***);
static int x_locate_word(const char *, int, int, int *, int *);
/* +++ generic editing functions +++ */
/* Called from main */
void
x_init(void)
{
/* set to -2 to force initial binding */
edchars.erase = edchars.kill = edchars.intr = edchars.quit =
edchars.eof = -2;
/* default value for deficient systems */
edchars.werase = 027; /* ^W */
if (setsig(&sigtraps[SIGWINCH], x_sigwinch,
SS_RESTORE_ORIG | SS_SHTRAP))
sigtraps[SIGWINCH].flags |= TF_SHELL_USES;
check_sigwinch(); /* force initial check */
x_init_emacs();
}
/* ARGSUSED */
static void
x_sigwinch(int sig __attribute__((unused)))
{
got_sigwinch = 1;
}
static void
check_sigwinch(void)
{
struct winsize ws;
got_sigwinch = 0;
if (procpid == kshpid && ioctl(tty_fd, TIOCGWINSZ, &ws) >= 0) {
struct tbl *vp;
/* Do NOT export COLUMNS/LINES. Many applications
* check COLUMNS/LINES before checking ws.ws_col/row,
* so if the app is started with C/L in the environ
* and the window is then resized, the app won't
* see the change cause the environ doesn't change.
*/
if (ws.ws_col) {
x_cols = ws.ws_col < MIN_COLS ? MIN_COLS : ws.ws_col;
if ((vp = typeset("COLUMNS", 0, 0, 0, 0)))
setint(vp, (long)ws.ws_col);
}
if (ws.ws_row && (vp = typeset("LINES", 0, 0, 0, 0)))
setint(vp, (long)ws.ws_row);
}
}
/*
* read an edited command line
*/
int
x_read(char *buf, size_t len)
{
int i;
x_mode(true);
if (Flag(FEMACS) || Flag(FGMACS))
i = x_emacs(buf, len);
else if (Flag(FVI))
i = x_vi(buf, len);
else
i = -1; /* internal error */
x_mode(false);
check_sigwinch();
return i;
}
/* tty I/O */
int
x_getc(void)
{
char c;
int n;
while ((n = blocking_read(STDIN_FILENO, &c, 1)) < 0 && errno == EINTR)
if (trap) {
x_mode(false);
runtraps(0);
x_mode(true);
}
if (n != 1)
return -1;
return (int)(unsigned char)c;
}
void
x_flush(void)
{
shf_flush(shl_out);
}
void
x_putc(int c)
{
shf_putc(c, shl_out);
}
void
x_puts(const char *s)
{
while (*s != 0)
shf_putc(*s++, shl_out);
}
bool
x_mode(bool onoff)
{
static bool x_cur_mode;
bool prev;
if (x_cur_mode == onoff)
return x_cur_mode;
prev = x_cur_mode;
x_cur_mode = onoff;
if (onoff) {
struct termios cb;
X_chars oldchars;
oldchars = edchars;
cb = tty_state;
edchars.erase = cb.c_cc[VERASE];
edchars.kill = cb.c_cc[VKILL];
edchars.intr = cb.c_cc[VINTR];
edchars.quit = cb.c_cc[VQUIT];
edchars.eof = cb.c_cc[VEOF];
edchars.werase = cb.c_cc[VWERASE];
cb.c_iflag &= ~(INLCR | ICRNL);
cb.c_lflag &= ~(ISIG | ICANON | ECHO);
/* osf/1 processes lnext when ~icanon */
cb.c_cc[VLNEXT] = _POSIX_VDISABLE;
/* sunos 4.1.x & osf/1 processes discard(flush) when ~icanon */
#ifdef VDISCARD
cb.c_cc[VDISCARD] = _POSIX_VDISABLE;
#endif
cb.c_cc[VTIME] = 0;
cb.c_cc[VMIN] = 1;
tcsetattr(tty_fd, TCSADRAIN, &cb);
/* Convert unset values to internal 'unset' value */
if (edchars.erase == _POSIX_VDISABLE)
edchars.erase = -1;
if (edchars.kill == _POSIX_VDISABLE)
edchars.kill = -1;
if (edchars.intr == _POSIX_VDISABLE)
edchars.intr = -1;
if (edchars.quit == _POSIX_VDISABLE)
edchars.quit = -1;
if (edchars.eof == _POSIX_VDISABLE)
edchars.eof = -1;
if (edchars.werase == _POSIX_VDISABLE)
edchars.werase = -1;
if (memcmp(&edchars, &oldchars, sizeof(edchars)) != 0) {
x_emacs_keys(&edchars);
}
} else
tcsetattr(tty_fd, TCSADRAIN, &tty_state);
return prev;
}
int
promptlen(const char *cp, const char **spp)
{
int count = 0;
const char *sp = cp;
char delimiter = 0;
int indelimit = 0;
/* Undocumented AT&T ksh feature:
* If the second char in the prompt string is \r then the first char
* is taken to be a non-printing delimiter and any chars between two
* instances of the delimiter are not considered to be part of the
* prompt length
*/
if (*cp && cp[1] == '\r') {
delimiter = *cp;
cp += 2;
}
for (; *cp; cp++) {
if (indelimit && *cp != delimiter)
;
else if (*cp == '\n' || *cp == '\r') {
count = 0;
sp = cp + 1;
} else if (*cp == '\t') {
count = (count | 7) + 1;
} else if (*cp == '\b') {
if (count > 0)
count--;
} else if (*cp == delimiter)
indelimit = !indelimit;
else
count++;
}
if (spp)
*spp = sp;
return count;
}
/* ------------------------------------------------------------------------- */
/* 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.
*/
int
x_do_comment(char *buf, int bsize, int *lenp)
{
int i, j;
int len = *lenp;
if (len == 0)
return 1; /* somewhat arbitrary - it's what at&t ksh does */
/* Already commented? */
if (buf[0] == '#') {
int saw_nl = 0;
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 char *add_glob(const char *, int);
static void glob_table(const char *, XPtrV *, struct table *);
static void glob_path(int flags, const char *, XPtrV *, const char *);
void
x_print_expansions(int nwords, char * const *words, int is_command)
{
int use_copy = 0;
int prefix_len;
XPtrV l = { NULL, NULL, NULL };
/* 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 && words[0][prefix_len - 1] != '/')
prefix_len--;
use_copy = 1;
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');
pr_list(use_copy ? (char **)XPptrv(l) : words);
if (use_copy)
XPfree(l); /* not x_free_words() */
}
/*
* Do file globbing:
* - appends * to (copy of) str if no globbing chars found
* - 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 flags __attribute__((unused)), const char *str,
int slen, char ***wordsp)
{
char *toglob;
char **words;
int nwords, i, idx, escaping;
XPtrV w;
struct source *s, *sold;
if (slen < 0)
return 0;
toglob = add_glob(str, slen);
/* remove all escaping backward slashes */
escaping = 0;
for (i = 0, idx = 0; toglob[i]; i++) {
if (toglob[i] == '\\' && !escaping) {
escaping = 1;
continue;
}
/* specially escape escaped [ for globbing */
if (escaping && toglob[i] == '[')
toglob[idx++] = QCHAR;
toglob[idx] = toglob[i];
idx++;
if (escaping)
escaping = 0;
}
toglob[idx] = '\0';
/*
* 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_errorf(0, "fileglob: substitute error");
return 0;
}
source = sold;
XPinit(w, 32);
expand(yylval.cp, &w, DOGLOB | DOTILDE | DOMARKDIRS);
XPput(w, NULL);
words = (char **)XPclose(w);
for (nwords = 0; words[nwords]; nwords++)
;
if (nwords == 1) {
struct stat statb;
/* 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);
nwords = 0;
}
}
afree(toglob, ATEMP);
*wordsp = nwords ? words : NULL;
return nwords;
}
/* Data structure used in x_command_glob() */
struct path_order_info {
char *word;
int base;
int path_order;
};
static int path_order_cmp(const void *aa, const void *bb);
/* 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;
t = strcmp(a->word + a->base, b->word + b->base);
return t ? t : a->path_order - b->path_order;
}
static int
x_command_glob(int flags, const char *str, int slen, char ***wordsp)
{
char *toglob;
char *pat;
char *fpath;
int nwords;
XPtrV w;
struct block *l;
if (slen < 0)
return 0;
toglob = add_glob(str, slen);
/* Convert "foo*" (toglob) to a pattern for future use */
pat = evalstr(toglob, DOPAT | DOTILDE);
afree(toglob, ATEMP);
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("FPATH"))) != 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;
struct path_order_info *last_info = 0;
char **words = (char **)XPptrv(w);
int path_order = 0;
int i;
info = (struct path_order_info *)
alloc(sizeof(struct path_order_info) * nwords, 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((void *)info, ATEMP);
} else {
/* Sort and remove duplicate entries */
char **words = (char **)XPptrv(w);
int i, j;
qsortp(XPptrv(w), (size_t)nwords, xstrcmp);
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];
nwords = j;
w.cur = (void **)&words[j];
}
XPput(w, NULL);
*wordsp = (char **)XPclose(w);
return nwords;
}
#define IS_WORDC(c) !( ctype(c, C_LEX1) || (c) == '\'' || (c) == '"' || \
(c) == '`' || (c) == '=' || (c) == ':' )
static int
x_locate_word(const char *buf, int buflen, int pos, int *startp,
int *is_commandp)
{
int p;
int start, end;
/* Bad call? Probably should report error */
if (pos < 0 || pos > buflen) {
*startp = pos;
*is_commandp = 0;
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) {
int iscmd;
/* Figure out if this is a command */
for (p = start - 1; p >= 0 && isspace(buf[p]); p--)
;
iscmd = p < 0 || strchr(";|&()`", buf[p]);
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 (buf[p] == '/')
break;
iscmd = p == end;
}
*is_commandp = iscmd;
}
*startp = start;
return end - start;
}
int
x_cf_glob(int flags, const char *buf, int buflen, int pos, int *startp,
int *endp, char ***wordsp, int *is_commandp)
{
int len;
int nwords;
char **words;
int is_command;
len = x_locate_word(buf, buflen, pos, startp, &is_command);
if (!(flags & XCF_COMMAND))
is_command = 0;
/* 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;
nwords = (is_command ? x_command_glob : x_file_glob) (flags,
buf + *startp, len, &words);
if (nwords == 0) {
*wordsp = NULL;
return 0;
}
if (is_commandp)
*is_commandp = is_command;
*wordsp = words;
*endp = *startp + len;
return nwords;
}
/* Given a string, copy it and possibly add a '*' to the end. The
* new string is returned.
*/
static char *
add_glob(const char *str, int slen)
{
char *toglob;
char *s;
bool saw_slash = false;
if (slen < 0)
return NULL;
toglob = str_nsave(str, slen + 1, ATEMP); /* + 1 for "*" */
toglob[slen] = '\0';
/*
* If the pathname contains a wildcard (an unquoted '*',
* '?', or '[') or parameter expansion ('$'), or a ~username
* with no trailing slash, then it is globbed based on that
* value (i.e., without the appended '*').
*/
for (s = toglob; *s; s++) {
if (*s == '\\' && s[1])
s++;
else if (*s == '*' || *s == '[' || *s == '?' || *s == '$'
|| (s[1] == '(' && strchr("*+?@!", *s)))
break;
else if (*s == '/')
saw_slash = true;
}
if (!*s && (*toglob != '~' || saw_slash)) {
toglob[slen] = '*';
toglob[slen + 1] = '\0';
}
return toglob;
}
/*
* Find longest common prefix
*/
int
x_longest_prefix(int nwords, char * const * words)
{
int i, j;
int 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;
}
return prefix_len;
}
void
x_free_words(int nwords, char **words)
{
int i;
for (i = 0; i < nwords; i++)
if (words[i])
afree(words[i], 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
*/
int
x_basename(const char *s, const char *se)
{
const char *p;
if (se == NULL)
se = s + strlen(s);
if (s == se)
return 0;
/* Skip trailing slashes */
for (p = se - 1; p > s && *p == '/'; p--)
;
for (; p > s && *p != '/'; p--)
;
if (*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;
for (twalk(&ts, tp); (te = tnext(&ts)); ) {
if (gmatchx(te->name, pat, false))
XPput(*wp, str_save(te->name, ATEMP));
}
}
static void
glob_path(int flags, const char *pat, XPtrV *wp, const char *lpath)
{
const char *sp, *p;
char *xp;
int staterr;
int pathlen;
int patlen;
int oldsize, newsize, i, j;
char **words;
XString xs;
patlen = strlen(pat) + 1;
sp = lpath;
Xinit(xs, xp, patlen + 128, ATEMP);
while (sp) {
xp = Xstring(xs, xp);
if (!(p = strchr(sp, ':')))
p = sp + strlen(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);
glob_str(Xstring(xs, xp), wp, 1); /* mark dirs */
newsize = XPsize(*wp);
/* Check that each match is executable... */
words = (char **)XPptrv(*wp);
for (i = j = oldsize; i < newsize; i++) {
staterr = 0;
if ((search_access(words[i], X_OK, &staterr) >= 0) ||
(staterr == EISDIR)) {
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->cur = (void **)&words[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
*/
int
x_escape(const char *s, size_t len, int (*putbuf_func) (const char *, size_t))
{
size_t add, wlen;
const char *ifs = str_val(local("IFS", 0));
int rval = 0;
for (add = 0, wlen = len; wlen - add > 0; add++) {
if (strchr("\\$()[{}*&;#|<>\"'`", s[add]) || strchr(ifs, s[add])) {
if (putbuf_func(s, add) != 0) {
rval = -1;
break;
}
putbuf_func("\\", 1);
putbuf_func(&s[add], 1);
add++;
wlen -= add;
s += add;
add = -1; /* after the increment it will go to 0 */
}
}
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 */
#define MKCTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */
#define UNCTRL(x) ((x) == 0x7F ? '?' : (x) | 0x40) /* ASCII */
#define META(x) ((x) & 0x7f)
#define ISMETA(x) (Flag(FEMACSUSEMETA) && ((x) & 0x80))
/* 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 {
u_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 */
/* Separator for completion */
#define is_cfs(c) (c == ' ' || c == '\t' || c == '"' || c == '\'')
#define is_mfs(c) (!(isalnum(c) || c == '_' || c == '$')) /* Separator for motion */
# define CHARMASK 0xFF /* 8-bit character mask */
# define X_NTABS 3 /* normal, meta1, meta2 */
#define X_TABSZ (CHARMASK+1) /* 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 int 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;
static int xx_cols;
static int x_col;
static int x_displen;
static int x_arg; /* general purpose arg */
static int x_arg_defaulted;/* x_arg not explicitly set; defaulted to 1 */
static int xlp_valid;
static int x_prefix1 = MKCTRL('['), x_prefix2 = MKCTRL('X');
static char **x_histp; /* history position */
static int x_nextcmd; /* for newline-and-next */
static char *xmp; /* mark pointer */
static u_char x_last_command;
static u_char (*x_tab)[X_TABSZ]; /* key definition */
static char *(*x_atab)[X_TABSZ]; /* macro definitions */
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;
static char *macroptr;
static int cur_col; /* current column on line */
static int pwidth; /* width of prompt */
static int prompt_trunc; /* how much of prompt to truncate */
static int prompt_skip; /* how much of prompt to skip */
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 char holdbuf[LINE]; /* place to hold last edit buffer */
static int holdlen; /* length of holdbuf */
static int x_ins(char *);
static void x_delete(int, int);
static int x_bword(void);
static int x_fword(void);
static void x_goto(char *);
static void x_bs(int);
static int x_size_str(char *);
static int x_size(int);
static void x_zots(char *);
static void x_zotc(int);
static void x_load_hist(char **);
static int x_search(char *, int, int);
static int x_match(char *, char *);
static void x_redraw(int);
static void x_push(int);
static char * x_mapin(const char *);
static char * x_mapout(int);
static void x_print(int, int);
static void x_adjust(void);
static void x_e_ungetc(int);
static int x_e_getc(void);
static void x_e_putc(int);
static void x_e_puts(const char *);
static int x_fold_case(int);
static char *x_lastcp(void);
static void do_complete(int, Comp_type);
static int x_emacs_putbuf(const char *, size_t);
#define XFUNC_abort 0
#define XFUNC_beg_hist 1
#define XFUNC_comp_comm 2
#define XFUNC_comp_file 3
#define XFUNC_complete 4
#define XFUNC_del_back 5
#define XFUNC_del_bword 6
#define XFUNC_del_char 7
#define XFUNC_del_fword 8
#define XFUNC_del_line 9
#define XFUNC_draw_line 10
#define XFUNC_end_hist 11
#define XFUNC_end_of_text 12
#define XFUNC_enumerate 13
#define XFUNC_eot_del 14
#define XFUNC_error 15
#define XFUNC_goto_hist 16
#define XFUNC_ins_string 17
#define XFUNC_insert 18
#define XFUNC_kill 19
#define XFUNC_kill_region 20
#define XFUNC_list_comm 21
#define XFUNC_list_file 22
#define XFUNC_literal 23
#define XFUNC_meta1 24
#define XFUNC_meta2 25
#define XFUNC_meta_yank 26
#define XFUNC_mv_back 27
#define XFUNC_mv_begin 28
#define XFUNC_mv_bword 29
#define XFUNC_mv_end 30
#define XFUNC_mv_forw 31
#define XFUNC_mv_fword 32
#define XFUNC_newline 33
#define XFUNC_next_com 34
#define XFUNC_nl_next_com 35
#define XFUNC_noop 36
#define XFUNC_prev_com 37
#define XFUNC_prev_histword 38
#define XFUNC_search_char_forw 39
#define XFUNC_search_char_back 40
#define XFUNC_search_hist 41
#define XFUNC_set_mark 42
#define XFUNC_stuff 43
#define XFUNC_stuffreset 44
#define XFUNC_transpose 45
#define XFUNC_xchg_point_mark 46
#define XFUNC_yank 47
#define XFUNC_comp_list 48
#define XFUNC_expand 49
#define XFUNC_fold_capitalize 50
#define XFUNC_fold_lower 51
#define XFUNC_fold_upper 52
#define XFUNC_set_arg 53
#define XFUNC_comment 54
static int x_abort (int);
static int x_beg_hist (int);
static int x_comp_comm (int);
static int x_comp_file (int);
static int x_complete (int);
static int x_del_back (int);
static int x_del_bword (int);
static int x_del_char (int);
static int x_del_fword (int);
static int x_del_line (int);
static int x_draw_line (int);
static int x_end_hist (int);
static int x_end_of_text (int);
static int x_enumerate (int);
static int x_eot_del (int);
static int x_error (int);
static int x_goto_hist (int);
static int x_ins_string (int);
static int x_insert (int);
static int x_kill (int);
static int x_kill_region (int);
static int x_list_comm (int);
static int x_list_file (int);
static int x_literal (int);
static int x_meta1 (int);
static int x_meta2 (int);
static int x_meta_yank (int);
static int x_mv_back (int);
static int x_mv_begin (int);
static int x_mv_bword (int);
static int x_mv_end (int);
static int x_mv_forw (int);
static int x_mv_fword (int);
static int x_newline (int);
static int x_next_com (int);
static int x_nl_next_com (int);
static int x_noop (int);
static int x_prev_com (int);
static int x_prev_histword (int);
static int x_search_char_forw (int);
static int x_search_char_back (int);
static int x_search_hist (int);
static int x_set_mark (int);
static int x_stuff (int);
static int x_stuffreset (int);
static int x_transpose (int);
static int x_xchg_point_mark (int);
static int x_yank (int);
static int x_comp_list (int);
static int x_expand (int);
static int x_fold_capitalize (int);
static int x_fold_lower (int);
static int x_fold_upper (int);
static int x_set_arg (int);
static int x_comment (int);
static const struct x_ftab x_ftab[] = {
{ x_abort, "abort", 0 },
{ x_beg_hist, "beginning-of-history", 0 },
{ x_comp_comm, "complete-command", 0 },
{ x_comp_file, "complete-file", 0 },
{ x_complete, "complete", 0 },
{ x_del_back, "delete-char-backward", XF_ARG },
{ x_del_bword, "delete-word-backward", XF_ARG },
{ x_del_char, "delete-char-forward", XF_ARG },
{ x_del_fword, "delete-word-forward", XF_ARG },
{ x_del_line, "kill-line", 0 },
{ x_draw_line, "redraw", 0 },
{ x_end_hist, "end-of-history", 0 },
{ x_end_of_text, "eot", 0 },
{ x_enumerate, "list", 0 },
{ x_eot_del, "eot-or-delete", XF_ARG },
{ x_error, "error", 0 },
{ x_goto_hist, "goto-history", XF_ARG },
{ x_ins_string, "macro-string", XF_NOBIND },
{ x_insert, "auto-insert", XF_ARG },
{ x_kill, "kill-to-eol", XF_ARG },
{ x_kill_region, "kill-region", 0 },
{ x_list_comm, "list-command", 0 },
{ x_list_file, "list-file", 0 },
{ x_literal, "quote", 0 },
{ x_meta1, "prefix-1", XF_PREFIX },
{ x_meta2, "prefix-2", XF_PREFIX },
{ x_meta_yank, "yank-pop", 0 },
{ x_mv_back, "backward-char", XF_ARG },
{ x_mv_begin, "beginning-of-line", 0 },
{ x_mv_bword, "backward-word", XF_ARG },
{ x_mv_end, "end-of-line", 0 },
{ x_mv_forw, "forward-char", XF_ARG },
{ x_mv_fword, "forward-word", XF_ARG },
{ x_newline, "newline", 0 },
{ x_next_com, "down-history", XF_ARG },
{ x_nl_next_com, "newline-and-next", 0 },
{ x_noop, "no-op", 0 },
{ x_prev_com, "up-history", XF_ARG },
{ x_prev_histword, "prev-hist-word", XF_ARG },
{ x_search_char_forw, "search-character-forward", XF_ARG },
{ x_search_char_back, "search-character-backward", XF_ARG },
{ x_search_hist, "search-history", 0 },
{ x_set_mark, "set-mark-command", 0 },
{ x_stuff, "stuff", 0 },
{ x_stuffreset, "stuff-reset", 0 },
{ x_transpose, "transpose-chars", 0 },
{ x_xchg_point_mark, "exchange-point-and-mark", 0 },
{ x_yank, "yank", 0 },
{ x_comp_list, "complete-list", 0 },
{ x_expand, "expand-file", 0 },
{ x_fold_capitalize, "capitalize-word", XF_ARG },
{ x_fold_lower, "downcase-word", XF_ARG },
{ x_fold_upper, "upcase-word", XF_ARG },
{ x_set_arg, "set-arg", XF_NOBIND },
{ x_comment, "comment", 0 },
{ 0, NULL, 0 }
};
static struct x_defbindings const x_defbindings[] = {
{ XFUNC_del_back, 0, MKCTRL('?') },
{ XFUNC_del_bword, 1, MKCTRL('?') },
{ XFUNC_eot_del, 0, MKCTRL('D') },
{ XFUNC_del_back, 0, MKCTRL('H') },
{ XFUNC_del_bword, 1, MKCTRL('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, MKCTRL('B') },
{ XFUNC_mv_forw, 0, MKCTRL('F') },
{ XFUNC_search_char_forw, 0, MKCTRL(']') },
{ XFUNC_search_char_back, 1, MKCTRL(']') },
{ XFUNC_newline, 0, MKCTRL('M') },
{ XFUNC_newline, 0, MKCTRL('J') },
{ XFUNC_end_of_text, 0, MKCTRL('_') },
{ XFUNC_abort, 0, MKCTRL('G') },
{ XFUNC_prev_com, 0, MKCTRL('P') },
{ XFUNC_next_com, 0, MKCTRL('N') },
{ XFUNC_nl_next_com, 0, MKCTRL('O') },
{ XFUNC_search_hist, 0, MKCTRL('R') },
{ XFUNC_beg_hist, 1, '<' },
{ XFUNC_end_hist, 1, '>' },
{ XFUNC_goto_hist, 1, 'g' },
{ XFUNC_mv_end, 0, MKCTRL('E') },
{ XFUNC_mv_begin, 0, MKCTRL('A') },
{ XFUNC_draw_line, 0, MKCTRL('L') },
{ XFUNC_meta1, 0, MKCTRL('[') },
{ XFUNC_meta2, 0, MKCTRL('X') },
{ XFUNC_kill, 0, MKCTRL('K') },
{ XFUNC_yank, 0, MKCTRL('Y') },
{ XFUNC_meta_yank, 1, 'y' },
{ XFUNC_literal, 0, MKCTRL('^') },
{ XFUNC_comment, 1, '#' },
#if defined(TIOCSTI)
{ XFUNC_stuff, 0, MKCTRL('T') },
#else
{ XFUNC_transpose, 0, MKCTRL('T') },
#endif
{ XFUNC_complete, 1, MKCTRL('[') },
{ XFUNC_comp_list, 0, MKCTRL('I') },
{ XFUNC_comp_list, 1, '=' },
{ XFUNC_enumerate, 1, '?' },
{ XFUNC_expand, 1, '*' },
{ XFUNC_comp_file, 1, MKCTRL('X') },
{ XFUNC_comp_comm, 2, MKCTRL('[') },
{ XFUNC_list_comm, 2, '?' },
{ XFUNC_list_file, 2, MKCTRL('Y') },
{ XFUNC_set_mark, 1, ' ' },
{ XFUNC_kill_region, 0, MKCTRL('W') },
{ XFUNC_xchg_point_mark, 2, MKCTRL('X') },
{ XFUNC_literal, 0, MKCTRL('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' },
{ XFUNC_fold_upper, 1, 'U' },
{ XFUNC_fold_upper, 1, 'u' },
{ XFUNC_fold_lower, 1, 'L' },
{ XFUNC_fold_lower, 1, 'l' },
{ XFUNC_fold_capitalize, 1, 'C' },
{ XFUNC_fold_capitalize, 1, 'c' },
/* 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' },
};
int
x_emacs(char *buf, size_t len)
{
int c;
const char *p;
int i;
u_char f;
xbp = xbuf = buf; xend = buf + len;
xlp = xcp = xep = buf;
*xcp = 0;
xlp_valid = true;
xmp = NULL;
x_curprefix = 0;
macroptr = NULL;
x_histp = histptr + 1;
x_last_command = XFUNC_error;
xx_cols = x_cols;
x_col = promptlen(prompt, &p);
prompt_skip = p - prompt;
x_adj_ok = 1;
x_displen = xx_cols - 2 - x_col;
x_adj_done = 0;
pprompt(prompt, 0);
if (x_nextcmd >= 0) {
int off = source->line - x_nextcmd;
if (histptr - history >= off)
x_load_hist(histptr - off);
x_nextcmd = -1;
}
while (1) {
x_flush();
if ((c = x_e_getc()) < 0)
return 0;
if (ISMETA(c)) {
c = META(c);
x_curprefix = 1;
}
f = x_curprefix == -1 ? XFUNC_insert :
x_tab[x_curprefix][c & CHARMASK];
if (!(x_ftab[f].xf_flags & XF_PREFIX) &&
x_last_command != XFUNC_set_arg) {
x_arg = 1;
x_arg_defaulted = 1;
}
i = c | (x_curprefix << 8);
x_curprefix = 0;
switch (i = (*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 */
trapsig(SIGINT);
x_mode(false);
unwind(LSHELL);
}
}
}
static int
x_insert(int c)
{
char str[2];
/*
* Should allow tab and control chars.
*/
if (c == 0) {
x_e_putc(7);
return KSTD;
}
str[0] = c;
str[1] = '\0';
while (x_arg--)
x_ins(str);
return KSTD;
}
static int
x_ins_string(int c)
{
if (macroptr) {
x_e_putc(7);
return KSTD;
}
macroptr = x_atab[c >> 8][c & CHARMASK];
if (macroptr && !*macroptr) {
/* XXX bell? */
macroptr = NULL;
}
return KSTD;
}
static int x_do_ins(const char *cp, int len);
static int
x_do_ins(const char *cp, int len)
{
if (xep + len >= xend) {
x_e_putc(7);
return -1;
}
memmove(xcp + len, xcp, xep - xcp + 1);
memmove(xcp, cp, len);
xcp += len;
xep += len;
return 0;
}
static int
x_ins(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 = (xcp >= xlp);
x_zots(cp);
if (adj == x_adj_done) { /* has x_adjust() been called? */
/* no */
for (cp = xlp; cp > xcp; )
x_bs(*--cp);
}
x_adj_ok = 1;
return 0;
}
/*
* this is used for x_escape() in do_complete()
*/
static int
x_emacs_putbuf(const char *s, size_t len)
{
int rval;
if ((rval = x_do_ins(s, len)) != 0)
return (rval);
return (rval);
}
static int
x_del_back(int c __attribute__((unused)))
{
int col = xcp - xbuf;
if (col == 0) {
x_e_putc(7);
return KSTD;
}
if (x_arg > col)
x_arg = col;
x_goto(xcp - x_arg);
x_delete(x_arg, false);
return KSTD;
}
static int
x_del_char(int c __attribute__((unused)))
{
int nleft = xep - xcp;
if (!nleft) {
x_e_putc(7);
return KSTD;
}
if (x_arg > nleft)
x_arg = nleft;
x_delete(x_arg, false);
return KSTD;
}
/* Delete nc chars to the right of the cursor (including cursor position) */
static void
x_delete(int nc, int push)
{
int i, j;
char *cp;
if (nc == 0)
return;
if (xmp != NULL && xmp > xcp) {
if (xcp + nc > xmp)
xmp = xcp;
else
xmp -= nc;
}
/*
* This lets us yank a word we have deleted.
*/
if (push)
x_push(nc);
xep -= nc;
cp = xcp;
j = 0;
i = nc;
while (i--) {
j += x_size(*cp++);
}
memmove(xcp, xcp + nc, xep - xcp + 1); /* Copies the null */
x_adj_ok = 0; /* don't redraw */
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) {
j = (j < i) ? j : i;
i = j;
while (i--)
x_e_putc(' ');
i = j;
while (i--)
x_e_putc('\b');
}
/*x_goto(xcp);*/
x_adj_ok = 1;
xlp_valid = false;
for (cp = x_lastcp(); cp > xcp;)
x_bs(*--cp);
return;
}
static int
x_del_bword(int c __attribute__((unused)))
{
x_delete(x_bword(), true);
return KSTD;
}
static int
x_mv_bword(int c __attribute__((unused)))
{
(void)x_bword();
return KSTD;
}
static int
x_mv_fword(int c __attribute__((unused)))
{
x_goto(xcp + x_fword());
return KSTD;
}
static int
x_del_fword(int c __attribute__((unused)))
{
x_delete(x_fword(), true);
return KSTD;
}
static int
x_bword(void)
{
int nc = 0;
char *cp = xcp;
if (cp == xbuf) {
x_e_putc(7);
return 0;
}
while (x_arg--) {
while (cp != xbuf && is_mfs(cp[-1])) {
cp--;
nc++;
}
while (cp != xbuf && !is_mfs(cp[-1])) {
cp--;
nc++;
}
}
x_goto(cp);
return nc;
}
static int
x_fword(void)
{
int nc = 0;
char *cp = xcp;
if (cp == xep) {
x_e_putc(7);
return 0;
}
while (x_arg--) {
while (cp != xep && is_mfs(*cp)) {
cp++;
nc++;
}
while (cp != xep && !is_mfs(*cp)) {
cp++;
nc++;
}
}
return nc;
}
static void
x_goto(char *cp)
{
if (cp < xbp || cp >= (xbp + x_displen)) {
/* we are heading off screen */
xcp = cp;
x_adjust();
} else if (cp < xcp) { /* move back */
while (cp < xcp)
x_bs(*--xcp);
} else if (cp > xcp) { /* move forward */
while (cp > xcp)
x_zotc(*xcp++);
}
}
static void
x_bs(int c)
{
int i;
i = x_size(c);
while (i--)
x_e_putc('\b');
}
static int
x_size_str(char *cp)
{
int size = 0;
while (*cp)
size += x_size(*cp++);
return size;
}
static int
x_size(int c)
{
if (c == '\t')
return 4; /* Kludge, tabs are always four spaces. */
if (iscntrl(c)) /* control char */
return 2;
return 1;
}
static void
x_zots(char *str)
{
int adj = x_adj_done;
x_lastcp();
while (*str && str < xlp && adj == x_adj_done)
x_zotc(*str++);
}
static void
x_zotc(int c)
{
if (c == '\t') {
/* Kludge, tabs are always four spaces. */
x_e_puts(" ");
} else if (iscntrl(c)) {
x_e_putc('^');
x_e_putc(UNCTRL(c));
} else
x_e_putc(c);
}
static int
x_mv_back(int c __attribute__((unused)))
{
int col = xcp - xbuf;
if (col == 0) {
x_e_putc(7);
return KSTD;
}
if (x_arg > col)
x_arg = col;
x_goto(xcp - x_arg);
return KSTD;
}
static int
x_mv_forw(int c __attribute__((unused)))
{
int nleft = xep - xcp;
if (!nleft) {
x_e_putc(7);
return KSTD;
}
if (x_arg > nleft)
x_arg = nleft;
x_goto(xcp + x_arg);
return KSTD;
}
static int
x_search_char_forw(int c)
{
char *cp = xcp;
*xep = '\0';
c = x_e_getc();
while (x_arg--) {
if (c < 0 ||
((cp = (cp == xep) ? NULL : strchr(cp + 1, c)) == NULL &&
(cp = strchr(xbuf, c)) == NULL)) {
x_e_putc(7);
return KSTD;
}
}
x_goto(cp);
return KSTD;
}
static int
x_search_char_back(int c)
{
char *cp = xcp, *p;
c = x_e_getc();
for (; x_arg--; cp = p)
for (p = cp; ; ) {
if (p-- == xbuf)
p = xep;
if (c < 0 || p == cp) {
x_e_putc(7);
return KSTD;
}
if (*p == c)
break;
}
x_goto(cp);
return KSTD;
}
static int
x_newline(int c __attribute__((unused)))
{
x_e_putc('\r');
x_e_putc('\n');
x_flush();
*xep++ = '\n';
return KEOL;
}
static int
x_end_of_text(int c __attribute__((unused)))
{
x_zotc(edchars.eof);
x_putc('\r');
x_putc('\n');
x_flush();
return KEOL;
}
static int
x_beg_hist(int c __attribute__((unused)))
{
x_load_hist(history);
return KSTD;
}
static int
x_end_hist(int c __attribute__((unused)))
{
x_load_hist(histptr);
return KSTD;
}
static int
x_prev_com(int c __attribute__((unused)))
{
x_load_hist(x_histp - x_arg);
return KSTD;
}
static int
x_next_com(int c __attribute__((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 __attribute__((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)
{
int oldsize;
if (hp < history || hp > histptr) {
x_e_putc(7);
return;
}
x_histp = hp;
oldsize = x_size_str(xbuf);
strlcpy(xbuf, *hp, xend - xbuf);
xbp = xbuf;
xep = xcp = xbuf + strlen(xbuf);
xlp_valid = false;
if (xep <= x_lastcp())
x_redraw(oldsize);
x_goto(xep);
}
static int
x_nl_next_com(int c)
{
x_nextcmd = source->line - (histptr - x_histp) + 1;
return (x_newline(c));
}
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[256 + 1]; /* pattern buffer */
char *p = pat;
u_char f;
*p = '\0';
while (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 & CHARMASK];
if (c == MKCTRL('['))
break;
else 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 = '\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 (p >= &pat[sizeof(pat) - 1]) {
x_e_putc(7);
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 { /* other command */
x_e_ungetc(c);
break;
}
}
if (offset < 0)
x_redraw(-1);
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_putc('\n');
x_load_hist(hp);
x_goto(xbuf + i + strlen(pat) - (*pat == '^'));
return i;
}
}
x_e_putc(7);
x_histp = histptr;
return -1;
}
/* 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 __attribute__((unused)))
{
int i, j;
*xep = 0;
i = xep - xbuf;
j = x_size_str(xbuf);
xcp = xbuf;
x_push(i);
xlp = xbp = xep = xbuf;
xlp_valid = true;
*xcp = 0;
xmp = NULL;
x_redraw(j);
return KSTD;
}
static int
x_mv_end(int c __attribute__((unused)))
{
x_goto(xep);
return KSTD;
}
static int
x_mv_begin(int c __attribute__((unused)))
{
x_goto(xbuf);
return KSTD;
}
static int
x_draw_line(int c __attribute__((unused)))
{
x_redraw(-1);
return KSTD;
}
/* Redraw (part of) the line. If limit is < 0, the everything is redrawn
* on a NEW line, otherwise limit is the screen column up to which needs
* redrawing.
*/
static void
x_redraw(int limit)
{
int i, j;
char *cp;
x_adj_ok = 0;
if (limit == -1)
x_e_putc('\n');
else
x_e_putc('\r');
x_flush();
if (xbp == xbuf) {
pprompt(prompt + prompt_skip, 0);
x_col = promptlen(prompt, NULL);
}
x_displen = xx_cols - 2 - x_col;
xlp_valid = false;
cp = x_lastcp();
x_zots(xbp);
if (xbp != xbuf || xep > xlp)
limit = xx_cols;
if (limit >= 0) {
if (xep > xlp)
i = 0; /* we fill the line */
else
i = limit - (xlp - xbp);
for (j = 0; j < i && x_col < (xx_cols - 2); j++)
x_e_putc(' ');
i = ' ';
if (xep > xlp) { /* more off screen */
if (xbp > xbuf)
i = '*';
else
i = '>';
} else if (xbp > xbuf)
i = '<';
x_e_putc(i);
j++;
while (j--)
x_e_putc('\b');
}
for (cp = xlp; cp > xcp; )
x_bs(*--cp);
x_adj_ok = 1;
return;
}
static int
x_transpose(int c __attribute__((unused)))
{
char tmp;
/* 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_putc(7);
return KSTD;
} else if (xcp == xep || Flag(FGMACS)) {
if (xcp - xbuf == 1) {
x_e_putc(7);
return KSTD;
}
/* Gosling/Unipress emacs style: Swap two characters before the
* cursor, do not change cursor position
*/
x_bs(xcp[-1]);
x_bs(xcp[-2]);
x_zotc(xcp[-1]);
x_zotc(xcp[-2]);
tmp = xcp[-1];
xcp[-1] = xcp[-2];
xcp[-2] = tmp;
} else {
/* GNU emacs style: Swap the characters before and under the
* cursor, move cursor position along one.
*/
x_bs(xcp[-1]);
x_zotc(xcp[0]);
x_zotc(xcp[-1]);
tmp = xcp[-1];
xcp[-1] = xcp[0];
xcp[0] = tmp;
x_bs(xcp[0]);
x_goto(xcp + 1);
}
return KSTD;
}
static int
x_literal(int c __attribute__((unused)))
{
x_curprefix = -1;
return KSTD;
}
static int
x_meta1(int c __attribute__((unused)))
{
x_curprefix = 1;
return KSTD;
}
static int
x_meta2(int c __attribute__((unused)))
{
x_curprefix = 2;
return KSTD;
}
static int
x_kill(int c __attribute__((unused)))
{
int col = xcp - xbuf;
int lastcol = xep - xbuf;
int ndel;
if (x_arg_defaulted)
x_arg = lastcol;
else if (x_arg > lastcol)
x_arg = lastcol;
ndel = x_arg - col;
if (ndel < 0) {
x_goto(xbuf + x_arg);
ndel = -ndel;
}
x_delete(ndel, true);
return KSTD;
}
static void
x_push(int nchars)
{
char *cp = str_nsave(xcp, nchars, AEDIT);
if (killstack[killsp])
afree((void *)killstack[killsp], AEDIT);
killstack[killsp] = cp;
killsp = (killsp + 1) % KILLSIZE;
}
static int
x_yank(int c __attribute__((unused)))
{
if (killsp == 0)
killtp = KILLSIZE;
else
killtp = killsp;
killtp--;
if (killstack[killtp] == 0) {
x_e_puts("\nnothing to yank");
x_redraw(-1);
return KSTD;
}
xmp = xcp;
x_ins(killstack[killtp]);
return KSTD;
}
static int
x_meta_yank(int c __attribute__((unused)))
{
int 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(-1);
return KSTD;
}
len = strlen(killstack[killtp]);
x_goto(xcp - len);
x_delete(len, false);
do {
if (killtp == 0)
killtp = KILLSIZE - 1;
else
killtp--;
} while (killstack[killtp] == 0);
x_ins(killstack[killtp]);
return KSTD;
}
static int
x_abort(int c __attribute__((unused)))
{
/* x_zotc(c); */
xlp = xep = xcp = xbp = xbuf;
xlp_valid = true;
*xcp = 0;
return KINTR;
}
static int
x_error(int c __attribute__((unused)))
{
x_e_putc(7);
return KSTD;
}
static int
x_stuffreset(int c)
{
#ifdef TIOCSTI
(void)x_stuff(c);
return KINTR;
#else
x_zotc(c);
xlp = xcp = xep = xbp = xbuf;
xlp_valid = true;
*xcp = 0;
x_redraw(-1);
return KSTD;
#endif
}
static int
x_stuff(int c)
{
#ifdef TIOCSTI
char ch = c;
bool savmode = x_mode(false);
(void)ioctl(tty_fd, TIOCSTI, &ch);
(void)x_mode(savmode);
x_redraw(-1);
#endif
return KSTD;
}
static char *
x_mapin(const char *cp)
{
char *new, *op;
op = new = str_save(cp, ATEMP);
while (*cp) {
/* XXX -- should handle \^ escape? */
if (*cp == '^') {
cp++;
if (*cp >= '?') /* includes '?'; ASCII */
*op++ = MKCTRL(*cp);
else {
*op++ = '^';
cp--;
}
} else
*op++ = *cp;
cp++;
}
*op = '\0';
return new;
}
static char *
x_mapout(int c)
{
static char buf[8];
char *p = buf;
if (iscntrl(c)) {
*p++ = '^';
*p++ = UNCTRL(c);
} else
*p++ = c;
*p = 0;
return buf;
}
static void
x_print(int prefix, int key)
{
if (prefix == 1)
shprintf("%s", x_mapout(x_prefix1));
if (prefix == 2)
shprintf("%s", x_mapout(x_prefix2));
shprintf("%s = ", x_mapout(key));
if (x_tab[prefix][key] != XFUNC_ins_string)
shprintf("%s\n", x_ftab[x_tab[prefix][key]].xf_name);
else
shprintf("'%s'\n", x_atab[prefix][key]);
}
int
x_bind(const char *a1, const char *a2,
int macro, /* bind -m */
int list) /* bind -l */
{
u_char f;
int prefix, key;
char *sp = NULL;
char *m1, *m2;
if (x_tab == NULL) {
bi_errorf("cannot bind, not a tty");
return 1;
}
/* List function names */
if (list) {
for (f = 0; f < NELEM(x_ftab); f++)
if (x_ftab[f].xf_name &&
!(x_ftab[f].xf_flags & XF_NOBIND))
shprintf("%s\n", 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 = x_tab[prefix][key];
if (f == XFUNC_insert || f == XFUNC_error ||
(macro && f != XFUNC_ins_string))
continue;
x_print(prefix, key);
}
return 0;
}
m1 = x_mapin(a1);
prefix = key = 0;
for (;; m1++) {
key = *m1 & CHARMASK;
if (x_tab[prefix][key] == XFUNC_meta1)
prefix = 1;
else if (x_tab[prefix][key] == XFUNC_meta2)
prefix = 2;
else
break;
}
if (a2 == NULL) {
x_print(prefix, key);
return 0;
}
if (*a2 == 0)
f = XFUNC_insert;
else if (!macro) {
for (f = 0; f < NELEM(x_ftab); f++)
if (x_ftab[f].xf_name &&
strcmp(x_ftab[f].xf_name, a2) == 0)
break;
if (f == NELEM(x_ftab) || x_ftab[f].xf_flags & XF_NOBIND) {
bi_errorf("%s: no such function", a2);
return 1;
}
} else {
f = XFUNC_ins_string;
m2 = x_mapin(a2);
sp = str_save(m2, AEDIT);
}
if (x_tab[prefix][key] == XFUNC_ins_string && x_atab[prefix][key])
afree((void *)x_atab[prefix][key], AEDIT);
x_tab[prefix][key] = f;
x_atab[prefix][key] = sp;
/* Track what the user has bound so x_emacs_keys() 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;
}
void
x_init_emacs(void)
{
int i, j;
ainit(AEDIT);
x_nextcmd = -1;
x_tab = (u_char (*)[X_TABSZ])alloc(sizeofN(*x_tab, X_NTABS), 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[(unsigned char)x_defbindings[i].xdb_tab][x_defbindings[i].xdb_char]
= x_defbindings[i].xdb_func;
x_atab = (char *(*)[X_TABSZ])alloc(sizeofN(*x_atab, X_NTABS), AEDIT);
for (i = 1; i < X_NTABS; i++)
for (j = 0; j < X_TABSZ; j++)
x_atab[i][j] = NULL;
Flag(FEMACSUSEMETA) = 0;
}
static void bind_if_not_bound(int p, int k, int func);
static void
bind_if_not_bound(int p, int k, int func)
{
/* Has user already bound this key? If so, don't override it */
if (x_bound[((p) * X_TABSZ + (k)) / 8] &
(1 << (((p) * X_TABSZ + (k)) % 8)))
return;
x_tab[p][k] = func;
}
void
x_emacs_keys(X_chars *ec)
{
if (ec->erase >= 0) {
bind_if_not_bound(0, ec->erase, XFUNC_del_back);
bind_if_not_bound(1, ec->erase, XFUNC_del_bword);
}
if (ec->kill >= 0)
bind_if_not_bound(0, ec->kill, XFUNC_del_line);
if (ec->werase >= 0)
bind_if_not_bound(0, ec->werase, XFUNC_del_bword);
if (ec->intr >= 0)
bind_if_not_bound(0, ec->intr, XFUNC_abort);
if (ec->quit >= 0)
bind_if_not_bound(0, ec->quit, XFUNC_noop);
}
static int
x_set_mark(int c __attribute__((unused)))
{
xmp = xcp;
return KSTD;
}
static int
x_kill_region(int c __attribute__((unused)))
{
int rsize;
char *xr;
if (xmp == NULL) {
x_e_putc(7);
return KSTD;
}
if (xmp > xcp) {
rsize = xmp - xcp;
xr = xcp;
} else {
rsize = xcp - xmp;
xr = xmp;
}
x_goto(xr);
x_delete(rsize, true);
xmp = xr;
return KSTD;
}
static int
x_xchg_point_mark(int c __attribute__((unused)))
{
char *tmp;
if (xmp == NULL) {
x_e_putc(7);
return KSTD;
}
tmp = xmp;
xmp = xcp;
x_goto(tmp);
return KSTD;
}
static int
x_noop(int c __attribute__((unused)))
{
return KSTD;
}
/*
* File/command name completion routines
*/
static int
x_comp_comm(int c __attribute__((unused)))
{
do_complete(XCF_COMMAND, CT_COMPLETE);
return KSTD;
}
static int
x_list_comm(int c __attribute__((unused)))
{
do_complete(XCF_COMMAND, CT_LIST);
return KSTD;
}
static int
x_complete(int c __attribute__((unused)))
{
do_complete(XCF_COMMAND_FILE, CT_COMPLETE);
return KSTD;
}
static int
x_enumerate(int c __attribute__((unused)))
{
do_complete(XCF_COMMAND_FILE, CT_LIST);
return KSTD;
}
static int
x_comp_file(int c __attribute__((unused)))
{
do_complete(XCF_FILE, CT_COMPLETE);
return KSTD;
}
static int
x_list_file(int c __attribute__((unused)))
{
do_complete(XCF_FILE, CT_LIST);
return KSTD;
}
static int
x_comp_list(int c __attribute__((unused)))
{
do_complete(XCF_COMMAND_FILE, CT_COMPLIST);
return KSTD;
}
static int
x_expand(int c __attribute__((unused)))
{
char **words;
int nwords = 0;
int start, end;
int is_command;
int i;
nwords = x_cf_glob(XCF_FILE, xbuf, xep - xbuf, xcp - xbuf,
&start, &end, &words, &is_command);
if (nwords == 0) {
x_e_putc(7);
return KSTD;
}
x_goto(xbuf + start);
x_delete(end - start, false);
for (i = 0; i < nwords;) {
if (x_escape(words[i], strlen(words[i]), x_emacs_putbuf) < 0 ||
(++i < nwords && x_ins(space) < 0)) {
x_e_putc(7);
return KSTD;
}
}
x_adjust();
return KSTD;
}
/* type == 0 for list, 1 for complete and 2 for complete-list */
static void
do_complete(int flags, /* XCF_{COMMAND,FILE,COMMAND_FILE} */
Comp_type type)
{
char **words;
int nwords;
int start, end, nlen, olen;
int is_command;
int completed = 0;
nwords = x_cf_glob(flags, xbuf, xep - xbuf, xcp - xbuf,
&start, &end, &words, &is_command);
/* no match */
if (nwords == 0) {
x_e_putc(7);
return;
}
if (type == CT_LIST) {
x_print_expansions(nwords, words, is_command);
x_redraw(0);
x_free_words(nwords, words);
return;
}
olen = end - start;
nlen = x_longest_prefix(nwords, words);
/* complete */
if (nwords == 1 || nlen > olen) {
x_goto(xbuf + start);
x_delete(olen, false);
x_escape(words[0], nlen, x_emacs_putbuf);
x_adjust();
completed = 1;
}
/* add space if single non-dir match */
if (nwords == 1 && words[0][nlen - 1] != '/') {
x_ins(space);
completed = 1;
}
if (type == CT_COMPLIST && !completed) {
x_print_expansions(nwords, words, is_command);
completed = 1;
}
if (completed)
x_redraw(0);
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)
{
x_adj_done++; /* flag the fact that we were called. */
/*
* we had a problem if the prompt length > xx_cols / 2
*/
if ((xbp = xcp - (x_displen / 2)) < xbuf)
xbp = xbuf;
xlp_valid = false;
x_redraw(xx_cols);
x_flush();
}
static int unget_char = -1;
static void
x_e_ungetc(int c)
{
unget_char = c;
}
static int
x_e_getc(void)
{
int c;
if (unget_char >= 0) {
c = unget_char;
unget_char = -1;
} else {
if (macroptr) {
c = *macroptr++;
if (!*macroptr)
macroptr = NULL;
} else
c = x_getc();
}
return c <= CHARMASK ? c : (c & CHARMASK);
}
static void
x_e_putc(int c)
{
if (c == '\r' || c == '\n')
x_col = 0;
if (x_col < xx_cols) {
x_putc(c);
switch (c) {
case 7:
break;
case '\r':
case '\n':
break;
case '\b':
x_col--;
break;
default:
x_col++;
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_putc(*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)
{
int n = 0;
int first = 1;
c &= CHARMASK; /* strip command prefix */
for (; c >= 0 && isdigit(c); c = x_e_getc(), first = 0)
n = n * 10 + (c - '0');
if (c < 0 || first) {
x_e_putc(7);
x_arg = 1;
x_arg_defaulted = 1;
} else {
x_e_ungetc(c);
x_arg = n;
x_arg_defaulted = 0;
}
return KSTD;
}
/* Comment or uncomment the current line. */
static int
x_comment(int c __attribute__((unused)))
{
int oldsize = x_size_str(xbuf);
int len = xep - xbuf;
int ret = x_do_comment(xbuf, xend - xbuf, &len);
if (ret < 0)
x_e_putc(7);
else {
xep = xbuf + len;
*xep = '\0';
xcp = xbp = xbuf;
x_redraw(oldsize);
if (ret > 0)
return x_newline('\n');
}
return KSTD;
}
/* 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.
*
* Bound to M-.
*
* RETURN VALUE:
* KSTD
*/
static int
x_prev_histword(int c __attribute__((unused)))
{
char *rcp;
char *cp;
cp = *histptr;
if (!cp)
x_e_putc(7);
else if (x_arg_defaulted) {
rcp = &cp[strlen(cp) - 1];
/*
* ignore white-space after the last word
*/
while (rcp > cp && is_cfs(*rcp))
rcp--;
while (rcp > cp && !is_cfs(*rcp))
rcp--;
if (is_cfs(*rcp))
rcp++;
x_ins(rcp);
} else {
int ch;
rcp = cp;
/*
* ignore white-space at start of line
*/
while (*rcp && is_cfs(*rcp))
rcp++;
while (x_arg-- > 1) {
while (*rcp && !is_cfs(*rcp))
rcp++;
while (*rcp && is_cfs(*rcp))
rcp++;
}
cp = rcp;
while (*rcp && !is_cfs(*rcp))
rcp++;
ch = *rcp;
*rcp = '\0';
x_ins(cp);
*rcp = ch;
}
return KSTD;
}
/* Uppercase N(1) words */
static int
x_fold_upper(int c __attribute__((unused)))
{
return x_fold_case('U');
}
/* Lowercase N(1) words */
static int
x_fold_lower(int c __attribute__((unused)))
{
return x_fold_case('L');
}
/* Lowercase N(1) words */
static int
x_fold_capitalize(int c __attribute__((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 and M-c
* to UPPER case, lower case or Capitalize words.
*
* RETURN VALUE:
* None
*/
static int
x_fold_case(int c)
{
char *cp = xcp;
if (cp == xep) {
x_e_putc(7);
return KSTD;
}
while (x_arg--) {
/*
* first skip over any white-space
*/
while (cp != xep && is_mfs(*cp))
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 */
if (isupper(*cp))
*cp = tolower(*cp);
} else { /* uppercase, capitalize */
if (islower(*cp))
*cp = toupper(*cp);
}
cp++;
}
/*
* now for the rest of the word
*/
while (cp != xep && !is_mfs(*cp)) {
if (c == 'U') { /* uppercase */
if (islower(*cp))
*cp = toupper(*cp);
} else { /* lowercase, capitalize */
if (isupper(*cp))
*cp = tolower(*cp);
}
cp++;
}
}
x_goto(cp);
return KSTD;
}
/* NAME:
* x_lastcp - last visible char
*
* SYNOPSIS:
* x_lastcp()
*
* DESCRIPTION:
* This function returns a pointer to that char in the
* edit buffer that will be the last displayed on the
* screen. The sequence:
*
* for (cp = x_lastcp(); cp > xcp; cp)
* x_bs(*--cp);
*
* Will position the cursor correctly on the screen.
*
* RETURN VALUE:
* cp or NULL
*/
static char *
x_lastcp(void)
{
char *rcp;
int i;
if (!xlp_valid) {
for (i = 0, rcp = xbp; rcp < xep && i < x_displen; rcp++)
i += x_size(*rcp);
xlp = rcp;
}
xlp_valid = true;
return (xlp);
}
/* +++ vi editing mode +++ */
#define Ctrl(c) (c&0x1f)
#define is_wordch(c) (letnum(c))
struct edstate {
int winleft;
char *cbuf;
int cbufsize;
int linelen;
int cursor;
};
static int vi_hook(int);
static void vi_reset(char *, size_t);
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 redo_insert(int);
static void yank_range(int, int);
static int bracktype(int);
static void save_cbuf(void);
static void restore_cbuf(void);
static void edit_reset(char *, size_t);
static int putbuf(const char *, int, int);
static void del_range(int, int);
static int findch(int, int, int, int);
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, char *);
static void redraw_line(int);
static void refresh(int);
static int outofwin(void);
static void rewindow(void);
static int newcol(int, 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 int char_len(int);
static void x_vi_zotc(int);
static void vi_pprompt(int);
static void vi_error(void);
static void vi_macro_reset(void);
static int x_vi_putbuf(const char *, size_t);
#define C_ 0x1 /* a valid command that isn't a M_, E_, U_ */
#define M_ 0x2 /* movement command (h, l, etc.) */
#define E_ 0x4 /* extended command (c, d, y) */
#define X_ 0x8 /* long command (@, f, F, t, T, etc.) */
#define U_ 0x10 /* an UN-undoable command (that isn't a M_) */
#define B_ 0x20 /* bad command (^@) */
#define Z_ 0x40 /* repeat count defaults to 0 (not 1) */
#define S_ 0x80 /* search (/, ?) */
#define is_bad(c) (classify[(c)&0x7f]&B_)
#define is_cmd(c) (classify[(c)&0x7f]&(M_|E_|C_|U_))
#define is_move(c) (classify[(c)&0x7f]&M_)
#define is_extend(c) (classify[(c)&0x7f]&E_)
#define is_long(c) (classify[(c)&0x7f]&X_)
#define is_undoable(c) (!(classify[(c)&0x7f]&U_))
#define is_srch(c) (classify[(c)&0x7f]&S_)
#define is_zerocount(c) (classify[(c)&0x7f]&Z_)
const unsigned char classify[128] = {
/* 0 1 2 3 4 5 6 7 */
/* 0 ^@ ^A ^B ^C ^D ^E ^F ^G */
B_, 0, 0, 0, 0, C_|U_, C_|Z_, 0,
/* 01 ^H ^I ^J ^K ^L ^M ^N ^O */
M_, C_|Z_, 0, 0, C_|U_, 0, C_, 0,
/* 02 ^P ^Q ^R ^S ^T ^U ^V ^W */
C_, 0, C_|U_, 0, 0, 0, C_, 0,
/* 03 ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
C_, 0, 0, C_|Z_, 0, 0, 0, 0,
/* 04 <space> ! " # $ % & ' */
M_, 0, 0, C_, M_, M_, 0, 0,
/* 05 ( ) * + , - . / */
0, 0, C_, C_, M_, C_, 0, C_|S_,
/* 06 0 1 2 3 4 5 6 7 */
M_, 0, 0, 0, 0, 0, 0, 0,
/* 07 8 9 : ; < = > ? */
0, 0, 0, M_, 0, C_, 0, C_|S_,
/* 010 @ A B C D E F G */
C_|X_, C_, M_, C_, C_, M_, M_|X_, C_|U_|Z_,
/* 011 H I J K L M N O */
0, C_, 0, 0, 0, 0, C_|U_, 0,
/* 012 P Q R S T U V W */
C_, 0, C_, C_, M_|X_, C_, 0, M_,
/* 013 X Y Z [ \ ] ^ _ */
C_, C_|U_, 0, 0, C_|Z_, 0, M_, C_|Z_,
/* 014 ` a b c d e f g */
0, C_, M_, E_, E_, M_, M_|X_, C_|Z_,
/* 015 h i j k l m n o */
M_, C_, C_|U_, C_|U_, M_, 0, C_|U_, 0,
/* 016 p q r s t u v w */
C_, 0, X_, C_, M_|X_, C_|U_, C_|U_|Z_,M_,
/* 017 x y z { | } ~ ^? */
C_, E_|U_, 0, 0, M_|Z_, 0, C_, 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 /* /, ? */
static char undocbuf[LINE];
static struct edstate *save_edstate(struct edstate *old);
static void restore_edstate(struct edstate *old, struct edstate *new);
static void free_edstate(struct edstate *old);
static struct edstate ebuf;
static struct edstate undobuf = { 0, undocbuf, LINE, 0, 0 };
static struct edstate *es; /* current editor state */
static struct edstate *undo;
static char ibuf[LINE]; /* input buffer */
static int 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[LINE]; /* 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; /* non-zero 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 modified; /* buffer has been "modified" */
static int state;
/* Information for keeping track of macros that are being expanded.
* The format of buf is the alias contents followed by a null byte followed
* by the name (letter) of the alias. The end of the buffer is marked by
* a double null. 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 */
int len; /* how much data in buffer */
};
static struct macro_state macro;
enum expand_mode {
NONE, EXPAND, COMPLETE, PRINT
};
static enum expand_mode expanded = NONE; /* last input was expanded */
int
x_vi(char *buf, size_t len)
{
int c;
vi_reset(buf, len > LINE ? LINE : len);
vi_pprompt(1);
x_flush();
while (1) {
if (macro.p) {
c = *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 (c == edchars.intr || c == edchars.quit) {
/* pretend we got an interrupt */
x_vi_zotc(c);
x_flush();
trapsig(c == edchars.intr ? SIGINT : SIGQUIT);
x_mode(false);
unwind(LSHELL);
} else if (c == edchars.eof) {
if (es->linelen == 0) {
x_vi_zotc(edchars.eof);
c = -1;
break;
}
continue;
}
}
if (vi_hook(c))
break;
x_flush();
}
x_putc('\r');
x_putc('\n');
x_flush();
if (c == -1 || (ssize_t)len <= es->linelen)
return -1;
if (es->cbuf != buf)
memmove(buf, es->cbuf, es->linelen);
buf[es->linelen++] = '\n';
return es->linelen;
}
static int
vi_hook(int ch)
{
static char curcmd[MAXVICMD], locpat[SRCHLEN];
static int cmdlen, argc1, argc2;
switch (state) {
case VNORMAL:
if (insert != 0) {
if (ch == Ctrl('v')) {
state = VLIT;
ch = '^';
}
switch (vi_insert(ch)) {
case -1:
vi_error();
state = VNORMAL;
break;
case 0:
if (state == VLIT) {
es->cursor--;
refresh(0);
} else
refresh(insert != 0);
break;
case 1:
return 1;
}
} else {
if (ch == '\r' || ch == '\n')
return 1;
cmdlen = 0;
argc1 = 0;
if (ch >= '1' && ch <= '9') {
argc1 = ch - '0';
state = VARG1;
} else {
curcmd[cmdlen++] = ch;
state = nextstate(ch);
if (state == VSEARCH) {
save_cbuf();
es->cursor = 0;
es->linelen = 0;
if (ch == '/') {
if (putbuf("/", 1, 0) != 0)
return -1;
} else if (putbuf("?", 1, 0) != 0)
return -1;
refresh(0);
}
}
}
break;
case VLIT:
if (is_bad(ch)) {
del_range(es->cursor, es->cursor + 1);
vi_error();
} else
es->cbuf[es->cursor++] = ch;
refresh(1);
state = VNORMAL;
break;
case VARG1:
if (isdigit(ch))
argc1 = argc1 * 10 + ch - '0';
else {
curcmd[cmdlen++] = ch;
state = nextstate(ch);
}
break;
case VEXTCMD:
argc2 = 0;
if (ch >= '1' && ch <= '9') {
argc2 = ch - '0';
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 (isdigit(ch))
argc2 = argc2 * 10 + ch - '0';
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('['))
state = VNORMAL;
else {
curcmd[cmdlen++] = ch;
state = VCMD;
}
break;
case VSEARCH:
if (ch == '\r' || ch == '\n' /*|| ch == Ctrl('[')*/ ) {
restore_cbuf();
/* Repeat last search? */
if (srchlen == 0) {
if (!srchpat[0]) {
vi_error();
state = VNORMAL;
refresh(0);
return 0;
}
} else {
locpat[srchlen] = '\0';
(void)strlcpy(srchpat, locpat, sizeof srchpat);
}
state = VCMD;
} else if (ch == edchars.erase || ch == Ctrl('h')) {
if (srchlen != 0) {
srchlen--;
es->linelen -= char_len((unsigned char)locpat[srchlen]);
es->cursor = es->linelen;
refresh(0);
return 0;
}
restore_cbuf();
state = VNORMAL;
refresh(0);
} else if (ch == edchars.kill) {
srchlen = 0;
es->linelen = 1;
es->cursor = 1;
refresh(0);
return 0;
} else if (ch == edchars.werase) {
int i;
int n = srchlen;
while (n > 0 && isspace(locpat[n - 1]))
n--;
while (n > 0 && !isspace(locpat[n - 1]))
n--;
for (i = srchlen; --i >= n; )
es->linelen -= char_len((unsigned char)locpat[i]);
srchlen = n;
es->cursor = es->linelen;
refresh(0);
return 0;
} else {
if (srchlen == SRCHLEN - 1)
vi_error();
else {
locpat[srchlen++] = ch;
if ((ch & 0x80) && Flag(FVISHOW8)) {
if (es->linelen + 2 > es->cbufsize)
vi_error();
es->cbuf[es->linelen++] = 'M';
es->cbuf[es->linelen++] = '-';
ch &= 0x7f;
}
if (ch < ' ' || ch == 0x7f) {
if (es->linelen + 2 > es->cbufsize)
vi_error();
es->cbuf[es->linelen++] = '^';
es->cbuf[es->linelen++] = ch ^ '@';
} else {
if (es->linelen >= es->cbufsize)
vi_error();
es->cbuf[es->linelen++] = ch;
}
es->cursor = es->linelen;
refresh(0);
}
return 0;
}
break;
}
switch (state) {
case 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' || lastcmd[0] == 'c' ||
lastcmd[0] == '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 void
vi_reset(char *buf, size_t len)
{
state = VNORMAL;
ohnum = hnum = hlast = histnum(-1) + 1;
insert = INSERT;
saved_inslen = inslen;
first_insert = 1;
inslen = 0;
modified = 1;
vi_macro_reset();
edit_reset(buf, len);
}
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 (is_cmd(ch))
return VCMD;
else
return VFAIL;
}
static int
vi_insert(int ch)
{
int tcursor;
if (ch == edchars.erase || ch == Ctrl('h')) {
if (insert == REPLACE) {
if (es->cursor == undo->cursor) {
vi_error();
return 0;
}
if (inslen > 0)
inslen--;
es->cursor--;
if (es->cursor >= undo->linelen)
es->linelen--;
else
es->cbuf[es->cursor] = undo->cbuf[es->cursor];
} else {
if (es->cursor == 0)
return 0;
if (inslen > 0)
inslen--;
es->cursor--;
es->linelen--;
memmove(&es->cbuf[es->cursor], &es->cbuf[es->cursor + 1],
es->linelen - es->cursor + 1);
}
expanded = NONE;
return 0;
}
if (ch == edchars.kill) {
if (es->cursor != 0) {
inslen = 0;
memmove(es->cbuf, &es->cbuf[es->cursor],
es->linelen - es->cursor);
es->linelen -= es->cursor;
es->cursor = 0;
}
expanded = NONE;
return 0;
}
if (ch == edchars.werase) {
if (es->cursor != 0) {
tcursor = Backword(1);
memmove(&es->cbuf[tcursor], &es->cbuf[es->cursor],
es->linelen - es->cursor);
es->linelen -= es->cursor - tcursor;
if (inslen < es->cursor - tcursor)
inslen = 0;
else
inslen -= es->cursor - tcursor;
es->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('['))
saved_inslen = 0;
switch (ch) {
case '\0':
return -1;
case '\r':
case '\n':
return 1;
case Ctrl('['):
expanded = NONE;
if (first_insert) {
first_insert = 0;
if (inslen == 0) {
inslen = saved_inslen;
return redo_insert(0);
}
lastcmd[0] = 'a';
lastac = 1;
}
if (lastcmd[0] == 's' || lastcmd[0] == 'c' ||
lastcmd[0] == 'C')
return redo_insert(0);
else
return redo_insert(lastac - 1);
/* { Begin nonstandard vi commands */
case Ctrl('x'):
expand_word(0);
break;
case Ctrl('f'):
complete_word(0, 0);
break;
case Ctrl('e'):
print_expansions(es, 0);
break;
case Ctrl('i'):
if (Flag(FVITABCOMPLETE)) {
complete_word(0, 0);
break;
}
/* FALLTHROUGH */
/* End nonstandard vi commands } */
default:
if (es->linelen >= es->cbufsize - 1)
return -1;
ibuf[inslen++] = ch;
if (insert == INSERT) {
memmove(&es->cbuf[es->cursor + 1], &es->cbuf[es->cursor],
es->linelen - es->cursor);
es->linelen++;
}
es->cbuf[es->cursor++] = ch;
if (insert == REPLACE && es->cursor > es->linelen)
es->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 == es->linelen && cur != 0)
cur--;
es->cursor = cur;
} else
return -1;
} else {
/* Don't save state in middle of macro.. */
if (is_undoable(*cmd) && !macro.p) {
undo->winleft = es->winleft;
memmove(undo->cbuf, es->cbuf, es->linelen);
undo->linelen = es->linelen;
undo->cursor = es->cursor;
lastac = argcnt;
memmove(lastcmd, cmd, MAXVICMD);
}
switch (*cmd) {
case Ctrl('l'):
case Ctrl('r'):
redraw_line(1);
break;
case '@':
{
static char alias[] = "_\0";
struct tbl *ap;
int olen, nlen;
char *p, *nbuf;
/* lookup letter in alias list... */
alias[1] = cmd[1];
ap = tsearch(&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 = strchr(p, '\0')) && 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);
nbuf = alloc(nlen + 1 + olen, APERM);
memcpy(nbuf, ap->val.s, nlen);
nbuf[nlen++] = cmd[1];
if (macro.p) {
memcpy(nbuf + nlen, macro.p, olen);
afree(macro.buf, APERM);
nlen += olen;
} else {
nbuf[nlen++] = '\0';
nbuf[nlen++] = '\0';
}
macro.p = macro.buf = (unsigned char *)nbuf;
macro.len = nlen;
}
break;
case 'a':
modified = 1;
hnum = hlast;
if (es->linelen != 0)
es->cursor++;
insert = INSERT;
break;
case 'A':
modified = 1;
hnum = hlast;
del_range(0, 0);
es->cursor = es->linelen;
insert = INSERT;
break;
case 'S':
es->cursor = domove(1, "^", 1);
del_range(es->cursor, es->linelen);
modified = 1;
hnum = hlast;
insert = INSERT;
break;
case 'Y':
cmd = "y$";
/* ahhhhhh... */
case 'c':
case 'd':
case 'y':
if (*cmd == cmd[1]) {
c1 = *cmd == 'c' ? domove(1, "^", 1) : 0;
c2 = es->linelen;
} else if (!is_move(cmd[1]))
return -1;
else {
if ((ncursor = domove(argcnt, &cmd[1], 1)) < 0)
return -1;
if (*cmd == 'c' &&
(cmd[1] == 'w' || cmd[1] == 'W') &&
!isspace(es->cbuf[es->cursor])) {
while (isspace(es->cbuf[--ncursor]))
;
ncursor++;
}
if (ncursor > es->cursor) {
c1 = es->cursor;
c2 = ncursor;
} else {
c1 = ncursor;
c2 = es->cursor;
if (cmd[1] == '%')
c2++;
}
}
if (*cmd != 'c' && c1 != c2)
yank_range(c1, c2);
if (*cmd != 'y') {
del_range(c1, c2);
es->cursor = c1;
}
if (*cmd == 'c') {
modified = 1;
hnum = hlast;
insert = INSERT;
}
break;
case 'p':
modified = 1;
hnum = hlast;
if (es->linelen != 0)
es->cursor++;
while (putbuf(ybuf, yanklen, 0) == 0 && --argcnt > 0)
;
if (es->cursor != 0)
es->cursor--;
if (argcnt != 0)
return -1;
break;
case 'P':
modified = 1;
hnum = hlast;
any = 0;
while (putbuf(ybuf, yanklen, 0) == 0 && --argcnt > 0)
any = 1;
if (any && es->cursor != 0)
es->cursor--;
if (argcnt != 0)
return -1;
break;
case 'C':
modified = 1;
hnum = hlast;
del_range(es->cursor, es->linelen);
insert = INSERT;
break;
case 'D':
yank_range(es->cursor, es->linelen);
del_range(es->cursor, es->linelen);
if (es->cursor != 0)
es->cursor--;
break;
case 'g':
if (!argcnt)
argcnt = hlast;
/* FALLTHRU */
case '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 'i':
modified = 1;
hnum = hlast;
insert = INSERT;
break;
case 'I':
modified = 1;
hnum = hlast;
es->cursor = domove(1, "^", 1);
insert = INSERT;
break;
case 'j':
case '+':
case Ctrl('n'):
if (grabhist(modified, hnum + argcnt) < 0)
return -1;
else {
modified = 0;
hnum += argcnt;
}
break;
case 'k':
case '-':
case Ctrl('p'):
if (grabhist(modified, hnum - argcnt) < 0)
return -1;
else {
modified = 0;
hnum -= argcnt;
}
break;
case 'r':
if (es->linelen == 0)
return -1;
modified = 1;
hnum = hlast;
if (cmd[1] == 0)
vi_error();
else {
int n;
if (es->cursor + argcnt > es->linelen)
return -1;
for (n = 0; n < argcnt; ++n)
es->cbuf[es->cursor + n] = cmd[1];
es->cursor += n - 1;
}
break;
case 'R':
modified = 1;
hnum = hlast;
insert = REPLACE;
break;
case 's':
if (es->linelen == 0)
return -1;
modified = 1;
hnum = hlast;
if (es->cursor + argcnt > es->linelen)
argcnt = es->linelen - es->cursor;
del_range(es->cursor, es->cursor + argcnt);
insert = INSERT;
break;
case 'v':
if (es->linelen == 0 && argcnt == 0)
return -1;
if (!argcnt) {
if (modified) {
es->cbuf[es->linelen] = '\0';
source->line++;
histsave(source->line, es->cbuf, 1);
} else
argcnt = source->line + 1
- (hlast - hnum);
}
shf_snprintf(es->cbuf, es->cbufsize,
argcnt ? "%s %d" : "%s",
"fc -e ${VISUAL:-${EDITOR:-vi}} --",
argcnt);
es->linelen = strlen(es->cbuf);
return 2;
case 'x':
if (es->linelen == 0)
return -1;
modified = 1;
hnum = hlast;
if (es->cursor + argcnt > es->linelen)
argcnt = es->linelen - es->cursor;
yank_range(es->cursor, es->cursor + argcnt);
del_range(es->cursor, es->cursor + argcnt);
break;
case 'X':
if (es->cursor > 0) {
modified = 1;
hnum = hlast;
if (es->cursor < argcnt)
argcnt = es->cursor;
yank_range(es->cursor - argcnt, es->cursor);
del_range(es->cursor - argcnt, es->cursor);
es->cursor -= argcnt;
} else
return -1;
break;
case 'u':
t = es;
es = undo;
undo = t;
break;
case 'U':
if (!modified)
return -1;
if (grabhist(modified, ohnum) < 0)
return -1;
modified = 0;
hnum = ohnum;
break;
case '?':
if (hnum == hlast)
hnum = -1;
/* ahhh */
case '/':
c3 = 1;
srchlen = 0;
lastsearch = *cmd;
/* FALLTHRU */
case 'n':
case '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;
}
break;
case '_':
{
int inspace;
char *p, *sp;
if (histnum(-1) < 0)
return -1;
p = *histpos();
#define issp(c) (isspace((c)) || (c) == '\n')
if (argcnt) {
while (*p && issp(*p))
p++;
while (*p && --argcnt) {
while (*p && !issp(*p))
p++;
while (*p && issp(*p))
p++;
}
if (!*p)
return -1;
sp = p;
} else {
sp = p;
inspace = 0;
while (*p) {
if (issp(*p))
inspace = 1;
else if (inspace) {
inspace = 0;
sp = p;
}
p++;
}
p = sp;
}
modified = 1;
hnum = hlast;
if (es->cursor != es->linelen)
es->cursor++;
while (*p && !issp(*p)) {
argcnt++;
p++;
}
if (putbuf(space, 1, 0) != 0)
argcnt = -1;
else if (putbuf(sp, argcnt, 0) != 0)
argcnt = -1;
if (argcnt < 0) {
if (es->cursor != 0)
es->cursor--;
return -1;
}
insert = INSERT;
}
break;
case '~':
{
char *p;
int i;
if (es->linelen == 0)
return -1;
for (i = 0; i < argcnt; i++) {
p = &es->cbuf[es->cursor];
if (islower(*p)) {
modified = 1;
hnum = hlast;
*p = toupper(*p);
} else if (isupper(*p)) {
modified = 1;
hnum = hlast;
*p = tolower(*p);
}
if (es->cursor < es->linelen - 1)
es->cursor++;
}
break;
}
case '#':
{
int ret = x_do_comment(es->cbuf, es->cbufsize,
&es->linelen);
if (ret >= 0)
es->cursor = 0;
return ret;
}
case '=': /* at&t ksh */
case Ctrl('e'): /* Nonstandard vi/ksh */
print_expansions(es, 1);
break;
case Ctrl('i'): /* Nonstandard vi/ksh */
if (!Flag(FVITABCOMPLETE))
return -1;
complete_word(1, argcnt);
break;
case Ctrl('['): /* some annoying at&t kshs */
if (!Flag(FVIESCCOMPLETE))
return -1;
case '\\': /* at&t ksh */
case Ctrl('f'): /* Nonstandard vi/ksh */
complete_word(1, argcnt);
break;
case '*': /* at&t ksh */
case Ctrl('x'): /* Nonstandard vi/ksh */
expand_word(1);
break;
}
if (insert == 0 && es->cursor != 0 && es->cursor >= es->linelen)
es->cursor--;
}
return 0;
}
static int
domove(int argcnt, const char *cmd, int sub)
{
int bcount, i = 0, t;
int ncursor = 0;
switch (*cmd) {
case 'b':
if (!sub && es->cursor == 0)
return -1;
ncursor = backword(argcnt);
break;
case 'B':
if (!sub && es->cursor == 0)
return -1;
ncursor = Backword(argcnt);
break;
case 'e':
if (!sub && es->cursor + 1 >= es->linelen)
return -1;
ncursor = endword(argcnt);
if (sub && ncursor < es->linelen)
ncursor++;
break;
case 'E':
if (!sub && es->cursor + 1 >= es->linelen)
return -1;
ncursor = Endword(argcnt);
if (sub && ncursor < es->linelen)
ncursor++;
break;
case 'f':
case 'F':
case 't':
case 'T':
fsavecmd = *cmd;
fsavech = cmd[1];
/* drop through */
case ',':
case ';':
if (fsavecmd == ' ')
return -1;
i = fsavecmd == 'f' || fsavecmd == 'F';
t = fsavecmd > 'a';
if (*cmd == ',')
t = !t;
if ((ncursor = findch(fsavech, argcnt, t, i)) < 0)
return -1;
if (sub && t)
ncursor++;
break;
case 'h':
case Ctrl('h'):
if (!sub && es->cursor == 0)
return -1;
ncursor = es->cursor - argcnt;
if (ncursor < 0)
ncursor = 0;
break;
case ' ':
case 'l':
if (!sub && es->cursor + 1 >= es->linelen)
return -1;
if (es->linelen != 0) {
ncursor = es->cursor + argcnt;
if (ncursor > es->linelen)
ncursor = es->linelen;
}
break;
case 'w':
if (!sub && es->cursor + 1 >= es->linelen)
return -1;
ncursor = forwword(argcnt);
break;
case 'W':
if (!sub && es->cursor + 1 >= es->linelen)
return -1;
ncursor = Forwword(argcnt);
break;
case '0':
ncursor = 0;
break;
case '^':
ncursor = 0;
while (ncursor < es->linelen - 1 && isspace(es->cbuf[ncursor]))
ncursor++;
break;
case '|':
ncursor = argcnt;
if (ncursor > es->linelen)
ncursor = es->linelen;
if (ncursor)
ncursor--;
break;
case '$':
if (es->linelen != 0)
ncursor = es->linelen;
else
ncursor = 0;
break;
case '%':
ncursor = es->cursor;
while (ncursor < es->linelen &&
(i = bracktype(es->cbuf[ncursor])) == 0)
ncursor++;
if (ncursor == es->linelen)
return -1;
bcount = 1;
do {
if (i > 0) {
if (++ncursor >= es->linelen)
return -1;
} else {
if (--ncursor < 0)
return -1;
}
t = bracktype(es->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
redo_insert(int count)
{
while (count-- > 0)
if (putbuf(ibuf, inslen, insert == REPLACE) != 0)
return -1;
if (es->cursor > 0)
es->cursor--;
insert = 0;
return 0;
}
static void
yank_range(int a, int b)
{
yanklen = b - a;
if (yanklen != 0)
memmove(ybuf, &es->cbuf[a], yanklen);
}
static int
bracktype(int ch)
{
switch (ch) {
case '(':
return 1;
case '[':
return 2;
case '{':
return 3;
case ')':
return -1;
case ']':
return -2;
case '}':
return -3;
default:
return 0;
}
}
/*
* Non user interface editor routines below here
*/
static void
save_cbuf(void)
{
memmove(holdbuf, es->cbuf, es->linelen);
holdlen = es->linelen;
holdbuf[holdlen] = '\0';
}
static void
restore_cbuf(void)
{
es->cursor = 0;
es->linelen = holdlen;
memmove(es->cbuf, holdbuf, holdlen);
}
/* return a new edstate */
static struct edstate *
save_edstate(struct edstate *old)
{
struct edstate *new;
new = (struct edstate *)alloc(sizeof(struct edstate), APERM);
new->cbuf = alloc(old->cbufsize, APERM);
memcpy(new->cbuf, old->cbuf, old->linelen);
new->cbufsize = old->cbufsize;
new->linelen = old->linelen;
new->cursor = old->cursor;
new->winleft = old->winleft;
return new;
}
static void
restore_edstate(struct edstate *new, struct edstate *old)
{
memcpy(new->cbuf, old->cbuf, old->linelen);
new->linelen = old->linelen;
new->cursor = old->cursor;
new->winleft = old->winleft;
free_edstate(old);
}
static void
free_edstate(struct edstate *old)
{
afree(old->cbuf, APERM);
afree((char *)old, APERM);
}
static void
edit_reset(char *buf, size_t len)
{
const char *p;
es = &ebuf;
es->cbuf = buf;
es->cbufsize = len;
undo = &undobuf;
undo->cbufsize = len;
es->linelen = undo->linelen = 0;
es->cursor = undo->cursor = 0;
es->winleft = undo->winleft = 0;
cur_col = pwidth = promptlen(prompt, &p);
prompt_skip = p - prompt;
if (pwidth > x_cols - 3 - MIN_EDIT_SPACE) {
cur_col = x_cols - 3 - MIN_EDIT_SPACE;
prompt_trunc = pwidth - cur_col;
pwidth -= prompt_trunc;
} else
prompt_trunc = 0;
if (!wbuf_len || wbuf_len != x_cols - 3) {
wbuf_len = x_cols - 3;
wbuf[0] = aresize(wbuf[0], wbuf_len, APERM);
wbuf[1] = aresize(wbuf[1], wbuf_len, APERM);
}
(void)memset(wbuf[0], ' ', wbuf_len);
(void)memset(wbuf[1], ' ', wbuf_len);
winwidth = x_cols - pwidth - 3;
win = 0;
morec = ' ';
lastref = 1;
holdlen = 0;
}
/*
* 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, 0);
}
static int
putbuf(const char *buf, int len, int repl)
{
if (len == 0)
return 0;
if (repl) {
if (es->cursor + len >= es->cbufsize)
return -1;
if (es->cursor + len > es->linelen)
es->linelen = es->cursor + len;
} else {
if (es->linelen + len >= es->cbufsize)
return -1;
memmove(&es->cbuf[es->cursor + len], &es->cbuf[es->cursor],
es->linelen - es->cursor);
es->linelen += len;
}
memmove(&es->cbuf[es->cursor], buf, len);
es->cursor += len;
return 0;
}
static void
del_range(int a, int b)
{
if (es->linelen != b)
memmove(&es->cbuf[a], &es->cbuf[b], es->linelen - b);
es->linelen -= b - a;
}
static int
findch(int ch, int cnt, int forw, int incl)
{
int ncursor;
if (es->linelen == 0)
return -1;
ncursor = es->cursor;
while (cnt--) {
do {
if (forw) {
if (++ncursor == es->linelen)
return -1;
} else {
if (--ncursor < 0)
return -1;
}
} while (es->cbuf[ncursor] != ch);
}
if (!incl) {
if (forw)
ncursor--;
else
ncursor++;
}
return ncursor;
}
static int
forwword(int argcnt)
{
int ncursor;
ncursor = es->cursor;
while (ncursor < es->linelen && argcnt--) {
if (is_wordch(es->cbuf[ncursor]))
while (is_wordch(es->cbuf[ncursor]) &&
ncursor < es->linelen)
ncursor++;
else if (!isspace(es->cbuf[ncursor]))
while (!is_wordch(es->cbuf[ncursor]) &&
!isspace(es->cbuf[ncursor]) &&
ncursor < es->linelen)
ncursor++;
while (isspace(es->cbuf[ncursor]) && ncursor < es->linelen)
ncursor++;
}
return ncursor;
}
static int
backword(int argcnt)
{
int ncursor;
ncursor = es->cursor;
while (ncursor > 0 && argcnt--) {
while (--ncursor > 0 && isspace(es->cbuf[ncursor]))
;
if (ncursor > 0) {
if (is_wordch(es->cbuf[ncursor]))
while (--ncursor >= 0 &&
is_wordch(es->cbuf[ncursor]))
;
else
while (--ncursor >= 0 &&
!is_wordch(es->cbuf[ncursor]) &&
!isspace(es->cbuf[ncursor]))
;
ncursor++;
}
}
return ncursor;
}
static int
endword(int argcnt)
{
int ncursor;
ncursor = es->cursor;
while (ncursor < es->linelen && argcnt--) {
while (++ncursor < es->linelen - 1 &&
isspace(es->cbuf[ncursor]))
;
if (ncursor < es->linelen - 1) {
if (is_wordch(es->cbuf[ncursor]))
while (++ncursor < es->linelen &&
is_wordch(es->cbuf[ncursor]))
;
else
while (++ncursor < es->linelen &&
!is_wordch(es->cbuf[ncursor]) &&
!isspace(es->cbuf[ncursor]))
;
ncursor--;
}
}
return ncursor;
}
static int
Forwword(int argcnt)
{
int ncursor;
ncursor = es->cursor;
while (ncursor < es->linelen && argcnt--) {
while (!isspace(es->cbuf[ncursor]) && ncursor < es->linelen)
ncursor++;
while (isspace(es->cbuf[ncursor]) && ncursor < es->linelen)
ncursor++;
}
return ncursor;
}
static int
Backword(int argcnt)
{
int ncursor;
ncursor = es->cursor;
while (ncursor > 0 && argcnt--) {
while (--ncursor >= 0 && isspace(es->cbuf[ncursor]))
;
while (ncursor >= 0 && !isspace(es->cbuf[ncursor]))
ncursor--;
ncursor++;
}
return ncursor;
}
static int
Endword(int argcnt)
{
int ncursor;
ncursor = es->cursor;
while (ncursor < es->linelen - 1 && argcnt--) {
while (++ncursor < es->linelen - 1 &&
isspace(es->cbuf[ncursor]))
;
if (ncursor < es->linelen - 1) {
while (++ncursor < es->linelen &&
!isspace(es->cbuf[ncursor]))
;
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_errorf(0, "grabhist: bad history array");
return -1;
}
if (save)
save_cbuf();
if ((es->linelen = strlen(hptr)) >= es->cbufsize)
es->linelen = es->cbufsize - 1;
memmove(es->cbuf, hptr, es->linelen);
es->cursor = 0;
ohnum = n;
return 0;
}
static int
grabsearch(int save, int start, int fwd, char *pat)
{
char *hptr;
int hist;
int anchored;
if ((start == 0 && fwd == 0) || (start >= hlast - 1 && fwd == 1))
return -1;
if (fwd)
start++;
else
start--;
anchored = *pat == '^' ? (++pat, 1) : 0;
if ((hist = findhist(start, fwd, pat, anchored)) < 0) {
/* if (start != 0 && fwd && match(holdbuf, pat) >= 0) { */
/* XXX should strcmp be strncmp? */
if (start != 0 && fwd && strcmp(holdbuf, pat) >= 0) {
restore_cbuf();
return 0;
} else
return -1;
}
if (save)
save_cbuf();
histnum(hist);
hptr = *histpos();
if ((es->linelen = strlen(hptr)) >= es->cbufsize)
es->linelen = es->cbufsize - 1;
memmove(es->cbuf, hptr, es->linelen);
es->cursor = 0;
return hist;
}
static void
redraw_line(int newl)
{
(void)memset(wbuf[win], ' ', wbuf_len);
if (newl) {
x_putc('\r');
x_putc('\n');
}
vi_pprompt(0);
cur_col = pwidth;
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 (es->cursor < es->winleft)
return 1;
col = 0;
cur = es->winleft;
while (cur < es->cursor)
col = newcol((unsigned char)es->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 < es->cursor) {
if (tcol - holdcol2 > winwidth / 2) {
holdcur1 = holdcur2;
holdcol1 = holdcol2;
holdcur2 = tcur;
holdcol2 = tcol;
}
tcol = newcol((unsigned char)es->cbuf[tcur++], tcol);
}
while (tcol - holdcol1 > winwidth / 2)
holdcol1 = newcol((unsigned char)es->cbuf[holdcur1++],
holdcol1);
es->winleft = holdcur1;
}
static int
newcol(int 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 = es->winleft;
moreright = 0;
twb1 = wb1;
while (col < winwidth && cur < es->linelen) {
if (cur == es->cursor && leftside)
ncol = col + pwidth;
if ((ch = es->cbuf[cur]) == '\t') {
do {
*twb1++ = ' ';
} while (++col < winwidth && (col & 7) != 0);
} else {
if ((ch & 0x80) && Flag(FVISHOW8)) {
*twb1++ = 'M';
if (++col < winwidth) {
*twb1++ = '-';
col++;
}
ch &= 0x7f;
}
if (col < winwidth) {
if (ch < ' ' || ch == 0x7f) {
*twb1++ = '^';
if (++col < winwidth) {
*twb1++ = ch ^ '@';
col++;
}
} else {
*twb1++ = ch;
col++;
}
}
}
if (cur == es->cursor && !leftside)
ncol = col + pwidth - 1;
cur++;
}
if (cur == es->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 (cur_col != col)
ed_mov_opt(col, wb1);
x_putc(*twb1);
cur_col++;
}
twb1++;
twb2++;
col++;
}
if (es->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 (es->winleft > 0)
mc = '<';
else if (moreright)
mc = '>';
else
mc = ' ';
if (mc != morec) {
ed_mov_opt(pwidth + winwidth + 1, wb1);
x_putc(mc);
cur_col++;
morec = mc;
}
if (cur_col != ncol)
ed_mov_opt(ncol, wb1);
}
static void
ed_mov_opt(int col, char *wb)
{
if (col < cur_col) {
if (col + 1 < cur_col - col) {
x_putc('\r');
vi_pprompt(0);
cur_col = pwidth;
while (cur_col++ < col)
x_putc(*wb++);
} else {
while (cur_col-- > col)
x_putc('\b');
}
} else {
wb = &wb[cur_col - pwidth];
while (cur_col++ < col)
x_putc(*wb++);
}
cur_col = col;
}
/* replace word with all expansions (ie, expand word*) */
static int
expand_word(int cmd)
{
static struct edstate *buf;
int rval = 0;
int nwords;
int start, end;
char **words;
int i;
/* Undo previous expansion */
if (cmd == 0 && expanded == EXPAND && buf) {
restore_edstate(es, buf);
buf = 0;
expanded = NONE;
return 0;
}
if (buf) {
free_edstate(buf);
buf = 0;
}
nwords = x_cf_glob(XCF_COMMAND_FILE|XCF_FULLPATH,
es->cbuf, es->linelen, es->cursor,
&start, &end, &words, NULL);
if (nwords == 0) {
vi_error();
return -1;
}
buf = save_edstate(es);
expanded = EXPAND;
del_range(start, end);
es->cursor = start;
for (i = 0; i < nwords; ) {
if (x_escape(words[i], strlen(words[i]), x_vi_putbuf) != 0) {
rval = -1;
break;
}
if (++i < nwords && putbuf(space, 1, 0) != 0) {
rval = -1;
break;
}
}
i = buf->cursor - end;
if (rval == 0 && i > 0)
es->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 = 0;
int nwords;
int start, end;
char **words;
char *match;
int match_len;
int is_unique;
int is_command;
/* 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(es, 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.
*/
nwords = x_cf_glob(XCF_COMMAND_FILE | (count ? XCF_FULLPATH : 0),
es->cbuf, es->linelen, es->cursor,
&start, &end, &words, &is_command);
if (nwords == 0) {
vi_error();
return -1;
}
if (count) {
int i;
count--;
if (count >= nwords) {
vi_error();
x_print_expansions(nwords, words, is_command);
x_free_words(nwords, words);
redraw_line(0);
return -1;
}
/*
* Expand the count'th word to its basename
*/
if (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 = 1;
/* expanded = PRINT; next call undo */
} else {
match = words[0];
match_len = x_longest_prefix(nwords, words);
expanded = COMPLETE; /* next call will list completions */
is_unique = nwords == 1;
}
buf = save_edstate(es);
del_range(start, end);
es->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;
/* If not a directory, add a space to the end... */
if (match_len > 0 && match[match_len - 1] != '/')
rval = putbuf(space, 1, 0);
}
x_free_words(nwords, words);
modified = 1;
hnum = hlast;
insert = INSERT;
lastac = 0; /* prevent this from being redone... */
refresh(0);
return rval;
}
static int
print_expansions(struct edstate *est, int cmd __attribute__((unused)))
{
int nwords;
int start, end;
char **words;
int is_command;
nwords = x_cf_glob(XCF_COMMAND_FILE | XCF_FULLPATH,
est->cbuf, est->linelen, est->cursor,
&start, &end, &words, &is_command);
if (nwords == 0) {
vi_error();
return -1;
}
x_print_expansions(nwords, words, is_command);
x_free_words(nwords, words);
redraw_line(0);
return 0;
}
/* How long is char when displayed (not counting tabs) */
static int
char_len(int c)
{
int len = 1;
if ((c & 0x80) && Flag(FVISHOW8)) {
len += 2;
c &= 0x7f;
}
if (c < ' ' || c == 0x7f)
len++;
return len;
}
/* Similar to x_zotc(emacs.c), but no tab weirdness */
static void
x_vi_zotc(int c)
{
if (Flag(FVISHOW8) && (c & 0x80)) {
x_puts("M-");
c &= 0x7f;
}
if (c < ' ' || c == 0x7f) {
x_putc('^');
c ^= '@';
}
x_putc(c);
}
static void
vi_pprompt(int full)
{
pprompt(prompt + (full ? 0 : prompt_skip), prompt_trunc);
}
static void
vi_error(void)
{
/* Beem out of any macros as soon as an error occurs */
vi_macro_reset();
x_putc(7);
x_flush();
}
static void
vi_macro_reset(void)
{
if (macro.p) {
afree(macro.buf, APERM);
memset((char *)&macro, 0, sizeof(macro));
}
}
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