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NetBSD/lib/libedit/common.c
christos 0e0ac6b723 - constify; passes all gcc and lint strict checks. 
- add config.h [Jason Evans], to create a portable version of libedit that
  can be easily compiled on other OS's.
2002-03-18 16:00:50 +00:00

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/* $NetBSD: common.c,v 1.11 2002/03/18 16:00:51 christos Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Christos Zoulas of Cornell University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)common.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: common.c,v 1.11 2002/03/18 16:00:51 christos Exp $");
#endif
#endif /* not lint && not SCCSID */
/*
* common.c: Common Editor functions
*/
#include "el.h"
/* ed_end_of_file():
* Indicate end of file
* [^D]
*/
protected el_action_t
/*ARGSUSED*/
ed_end_of_file(EditLine *el, int c)
{
re_goto_bottom(el);
*el->el_line.lastchar = '\0';
return (CC_EOF);
}
/* ed_insert():
* Add character to the line
* Insert a character [bound to all insert keys]
*/
protected el_action_t
ed_insert(EditLine *el, int c)
{
int i;
if (c == '\0')
return (CC_ERROR);
if (el->el_line.lastchar + el->el_state.argument >=
el->el_line.limit) {
/* end of buffer space, try to allocate more */
if (!ch_enlargebufs(el, (size_t) el->el_state.argument))
return CC_ERROR; /* error allocating more */
}
if (el->el_state.argument == 1) {
if (el->el_state.inputmode != MODE_INSERT) {
el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] =
*el->el_line.cursor;
el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] =
'\0';
c_delafter(el, 1);
}
c_insert(el, 1);
*el->el_line.cursor++ = c;
el->el_state.doingarg = 0; /* just in case */
re_fastaddc(el); /* fast refresh for one char. */
} else {
if (el->el_state.inputmode != MODE_INSERT) {
for (i = 0; i < el->el_state.argument; i++)
el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] =
el->el_line.cursor[i];
el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] =
'\0';
c_delafter(el, el->el_state.argument);
}
c_insert(el, el->el_state.argument);
while (el->el_state.argument--)
*el->el_line.cursor++ = c;
re_refresh(el);
}
if (el->el_state.inputmode == MODE_REPLACE_1)
(void) vi_command_mode(el, 0);
return (CC_NORM);
}
/* ed_delete_prev_word():
* Delete from beginning of current word to cursor
* [M-^?] [^W]
*/
protected el_action_t
/*ARGSUSED*/
ed_delete_prev_word(EditLine *el, int c)
{
char *cp, *p, *kp;
if (el->el_line.cursor == el->el_line.buffer)
return (CC_ERROR);
cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
el->el_state.argument, ce__isword);
for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
*kp++ = *p;
el->el_chared.c_kill.last = kp;
c_delbefore(el, el->el_line.cursor - cp); /* delete before dot */
el->el_line.cursor = cp;
if (el->el_line.cursor < el->el_line.buffer)
el->el_line.cursor = el->el_line.buffer; /* bounds check */
return (CC_REFRESH);
}
/* ed_delete_next_char():
* Delete character under cursor
* [^D] [x]
*/
protected el_action_t
/*ARGSUSED*/
ed_delete_next_char(EditLine *el, int c)
{
#ifdef notdef /* XXX */
#define EL el->el_line
(void) fprintf(el->el_errlfile,
"\nD(b: %x(%s) c: %x(%s) last: %x(%s) limit: %x(%s)\n",
EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
EL.lastchar, EL.limit, EL.limit);
#endif
if (el->el_line.cursor == el->el_line.lastchar) {
/* if I'm at the end */
if (el->el_map.type == MAP_VI) {
if (el->el_line.cursor == el->el_line.buffer) {
/* if I'm also at the beginning */
#ifdef KSHVI
return (CC_ERROR);
#else
term_overwrite(el, STReof, 4);
/* then do a EOF */
term__flush();
return (CC_EOF);
#endif
} else {
#ifdef KSHVI
el->el_line.cursor--;
#else
return (CC_ERROR);
#endif
}
} else {
if (el->el_line.cursor != el->el_line.buffer)
el->el_line.cursor--;
else
return (CC_ERROR);
}
}
c_delafter(el, el->el_state.argument); /* delete after dot */
if (el->el_line.cursor >= el->el_line.lastchar &&
el->el_line.cursor > el->el_line.buffer)
/* bounds check */
el->el_line.cursor = el->el_line.lastchar - 1;
return (CC_REFRESH);
}
/* ed_kill_line():
* Cut to the end of line
* [^K] [^K]
*/
protected el_action_t
/*ARGSUSED*/
ed_kill_line(EditLine *el, int c)
{
char *kp, *cp;
cp = el->el_line.cursor;
kp = el->el_chared.c_kill.buf;
while (cp < el->el_line.lastchar)
*kp++ = *cp++; /* copy it */
el->el_chared.c_kill.last = kp;
/* zap! -- delete to end */
el->el_line.lastchar = el->el_line.cursor;
return (CC_REFRESH);
}
/* ed_move_to_end():
* Move cursor to the end of line
* [^E] [^E]
*/
protected el_action_t
/*ARGSUSED*/
ed_move_to_end(EditLine *el, int c)
{
el->el_line.cursor = el->el_line.lastchar;
if (el->el_map.type == MAP_VI) {
#ifdef VI_MOVE
el->el_line.cursor--;
#endif
if (el->el_chared.c_vcmd.action & DELETE) {
cv_delfini(el);
return (CC_REFRESH);
}
}
return (CC_CURSOR);
}
/* ed_move_to_beg():
* Move cursor to the beginning of line
* [^A] [^A]
*/
protected el_action_t
/*ARGSUSED*/
ed_move_to_beg(EditLine *el, int c)
{
el->el_line.cursor = el->el_line.buffer;
if (el->el_map.type == MAP_VI) {
/* We want FIRST non space character */
while (isspace((unsigned char) *el->el_line.cursor))
el->el_line.cursor++;
if (el->el_chared.c_vcmd.action & DELETE) {
cv_delfini(el);
return (CC_REFRESH);
}
}
return (CC_CURSOR);
}
/* ed_transpose_chars():
* Exchange the character to the left of the cursor with the one under it
* [^T] [^T]
*/
protected el_action_t
ed_transpose_chars(EditLine *el, int c)
{
if (el->el_line.cursor < el->el_line.lastchar) {
if (el->el_line.lastchar <= &el->el_line.buffer[1])
return (CC_ERROR);
else
el->el_line.cursor++;
}
if (el->el_line.cursor > &el->el_line.buffer[1]) {
/* must have at least two chars entered */
c = el->el_line.cursor[-2];
el->el_line.cursor[-2] = el->el_line.cursor[-1];
el->el_line.cursor[-1] = c;
return (CC_REFRESH);
} else
return (CC_ERROR);
}
/* ed_next_char():
* Move to the right one character
* [^F] [^F]
*/
protected el_action_t
/*ARGSUSED*/
ed_next_char(EditLine *el, int c)
{
if (el->el_line.cursor >= el->el_line.lastchar)
return (CC_ERROR);
el->el_line.cursor += el->el_state.argument;
if (el->el_line.cursor > el->el_line.lastchar)
el->el_line.cursor = el->el_line.lastchar;
if (el->el_map.type == MAP_VI)
if (el->el_chared.c_vcmd.action & DELETE) {
cv_delfini(el);
return (CC_REFRESH);
}
return (CC_CURSOR);
}
/* ed_prev_word():
* Move to the beginning of the current word
* [M-b] [b]
*/
protected el_action_t
/*ARGSUSED*/
ed_prev_word(EditLine *el, int c)
{
if (el->el_line.cursor == el->el_line.buffer)
return (CC_ERROR);
el->el_line.cursor = c__prev_word(el->el_line.cursor,
el->el_line.buffer,
el->el_state.argument,
ce__isword);
if (el->el_map.type == MAP_VI)
if (el->el_chared.c_vcmd.action & DELETE) {
cv_delfini(el);
return (CC_REFRESH);
}
return (CC_CURSOR);
}
/* ed_prev_char():
* Move to the left one character
* [^B] [^B]
*/
protected el_action_t
/*ARGSUSED*/
ed_prev_char(EditLine *el, int c)
{
if (el->el_line.cursor > el->el_line.buffer) {
el->el_line.cursor -= el->el_state.argument;
if (el->el_line.cursor < el->el_line.buffer)
el->el_line.cursor = el->el_line.buffer;
if (el->el_map.type == MAP_VI)
if (el->el_chared.c_vcmd.action & DELETE) {
cv_delfini(el);
return (CC_REFRESH);
}
return (CC_CURSOR);
} else
return (CC_ERROR);
}
/* ed_quoted_insert():
* Add the next character typed verbatim
* [^V] [^V]
*/
protected el_action_t
ed_quoted_insert(EditLine *el, int c)
{
int num;
char tc;
tty_quotemode(el);
num = el_getc(el, &tc);
c = (unsigned char) tc;
tty_noquotemode(el);
if (num == 1)
return (ed_insert(el, c));
else
return (ed_end_of_file(el, 0));
}
/* ed_digit():
* Adds to argument or enters a digit
*/
protected el_action_t
ed_digit(EditLine *el, int c)
{
if (!isdigit(c))
return (CC_ERROR);
if (el->el_state.doingarg) {
/* if doing an arg, add this in... */
if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
el->el_state.argument = c - '0';
else {
if (el->el_state.argument > 1000000)
return (CC_ERROR);
el->el_state.argument =
(el->el_state.argument * 10) + (c - '0');
}
return (CC_ARGHACK);
} else {
if (el->el_line.lastchar + 1 >= el->el_line.limit) {
if (!ch_enlargebufs(el, 1))
return (CC_ERROR);
}
if (el->el_state.inputmode != MODE_INSERT) {
el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] =
*el->el_line.cursor;
el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] =
'\0';
c_delafter(el, 1);
}
c_insert(el, 1);
*el->el_line.cursor++ = c;
el->el_state.doingarg = 0;
re_fastaddc(el);
}
return (CC_NORM);
}
/* ed_argument_digit():
* Digit that starts argument
* For ESC-n
*/
protected el_action_t
ed_argument_digit(EditLine *el, int c)
{
if (!isdigit(c))
return (CC_ERROR);
if (el->el_state.doingarg) {
if (el->el_state.argument > 1000000)
return (CC_ERROR);
el->el_state.argument = (el->el_state.argument * 10) +
(c - '0');
} else { /* else starting an argument */
el->el_state.argument = c - '0';
el->el_state.doingarg = 1;
}
return (CC_ARGHACK);
}
/* ed_unassigned():
* Indicates unbound character
* Bound to keys that are not assigned
*/
protected el_action_t
/*ARGSUSED*/
ed_unassigned(EditLine *el, int c)
{
term_beep(el);
term__flush();
return (CC_NORM);
}
/**
** TTY key handling.
**/
/* ed_tty_sigint():
* Tty interrupt character
* [^C]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_sigint(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_tty_dsusp():
* Tty delayed suspend character
* [^Y]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_dsusp(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_tty_flush_output():
* Tty flush output characters
* [^O]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_flush_output(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_tty_sigquit():
* Tty quit character
* [^\]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_sigquit(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_tty_sigtstp():
* Tty suspend character
* [^Z]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_sigtstp(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_tty_stop_output():
* Tty disallow output characters
* [^S]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_stop_output(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_tty_start_output():
* Tty allow output characters
* [^Q]
*/
protected el_action_t
/*ARGSUSED*/
ed_tty_start_output(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_newline():
* Execute command
* [^J]
*/
protected el_action_t
/*ARGSUSED*/
ed_newline(EditLine *el, int c)
{
re_goto_bottom(el);
*el->el_line.lastchar++ = '\n';
*el->el_line.lastchar = '\0';
if (el->el_map.type == MAP_VI)
el->el_chared.c_vcmd.ins = el->el_line.buffer;
return (CC_NEWLINE);
}
/* ed_delete_prev_char():
* Delete the character to the left of the cursor
* [^?]
*/
protected el_action_t
/*ARGSUSED*/
ed_delete_prev_char(EditLine *el, int c)
{
if (el->el_line.cursor <= el->el_line.buffer)
return (CC_ERROR);
c_delbefore(el, el->el_state.argument);
el->el_line.cursor -= el->el_state.argument;
if (el->el_line.cursor < el->el_line.buffer)
el->el_line.cursor = el->el_line.buffer;
return (CC_REFRESH);
}
/* ed_clear_screen():
* Clear screen leaving current line at the top
* [^L]
*/
protected el_action_t
/*ARGSUSED*/
ed_clear_screen(EditLine *el, int c)
{
term_clear_screen(el); /* clear the whole real screen */
re_clear_display(el); /* reset everything */
return (CC_REFRESH);
}
/* ed_redisplay():
* Redisplay everything
* ^R
*/
protected el_action_t
/*ARGSUSED*/
ed_redisplay(EditLine *el, int c)
{
return (CC_REDISPLAY);
}
/* ed_start_over():
* Erase current line and start from scratch
* [^G]
*/
protected el_action_t
/*ARGSUSED*/
ed_start_over(EditLine *el, int c)
{
ch_reset(el);
return (CC_REFRESH);
}
/* ed_sequence_lead_in():
* First character in a bound sequence
* Placeholder for external keys
*/
protected el_action_t
/*ARGSUSED*/
ed_sequence_lead_in(EditLine *el, int c)
{
return (CC_NORM);
}
/* ed_prev_history():
* Move to the previous history line
* [^P] [k]
*/
protected el_action_t
/*ARGSUSED*/
ed_prev_history(EditLine *el, int c)
{
char beep = 0;
el->el_chared.c_undo.action = NOP;
*el->el_line.lastchar = '\0'; /* just in case */
if (el->el_history.eventno == 0) { /* save the current buffer
* away */
(void) strncpy(el->el_history.buf, el->el_line.buffer,
EL_BUFSIZ);
el->el_history.last = el->el_history.buf +
(el->el_line.lastchar - el->el_line.buffer);
}
el->el_history.eventno += el->el_state.argument;
if (hist_get(el) == CC_ERROR) {
beep = 1;
/* el->el_history.eventno was fixed by first call */
(void) hist_get(el);
}
re_refresh(el);
if (beep)
return (CC_ERROR);
else
return (CC_NORM); /* was CC_UP_HIST */
}
/* ed_next_history():
* Move to the next history line
* [^N] [j]
*/
protected el_action_t
/*ARGSUSED*/
ed_next_history(EditLine *el, int c)
{
el->el_chared.c_undo.action = NOP;
*el->el_line.lastchar = '\0'; /* just in case */
el->el_history.eventno -= el->el_state.argument;
if (el->el_history.eventno < 0) {
el->el_history.eventno = 0;
return (CC_ERROR);/* make it beep */
}
return (hist_get(el));
}
/* ed_search_prev_history():
* Search previous in history for a line matching the current
* next search history [M-P] [K]
*/
protected el_action_t
/*ARGSUSED*/
ed_search_prev_history(EditLine *el, int c)
{
const char *hp;
int h;
bool_t found = 0;
el->el_chared.c_vcmd.action = NOP;
el->el_chared.c_undo.action = NOP;
*el->el_line.lastchar = '\0'; /* just in case */
if (el->el_history.eventno < 0) {
#ifdef DEBUG_EDIT
(void) fprintf(el->el_errfile,
"e_prev_search_hist(): eventno < 0;\n");
#endif
el->el_history.eventno = 0;
return (CC_ERROR);
}
if (el->el_history.eventno == 0) {
(void) strncpy(el->el_history.buf, el->el_line.buffer,
EL_BUFSIZ);
el->el_history.last = el->el_history.buf +
(el->el_line.lastchar - el->el_line.buffer);
}
if (el->el_history.ref == NULL)
return (CC_ERROR);
hp = HIST_FIRST(el);
if (hp == NULL)
return (CC_ERROR);
c_setpat(el); /* Set search pattern !! */
for (h = 1; h <= el->el_history.eventno; h++)
hp = HIST_NEXT(el);
while (hp != NULL) {
#ifdef SDEBUG
(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
#endif
if ((strncmp(hp, el->el_line.buffer, (size_t)
(el->el_line.lastchar - el->el_line.buffer)) ||
hp[el->el_line.lastchar - el->el_line.buffer]) &&
c_hmatch(el, hp)) {
found++;
break;
}
h++;
hp = HIST_NEXT(el);
}
if (!found) {
#ifdef SDEBUG
(void) fprintf(el->el_errfile, "not found\n");
#endif
return (CC_ERROR);
}
el->el_history.eventno = h;
return (hist_get(el));
}
/* ed_search_next_history():
* Search next in history for a line matching the current
* [M-N] [J]
*/
protected el_action_t
/*ARGSUSED*/
ed_search_next_history(EditLine *el, int c)
{
const char *hp;
int h;
bool_t found = 0;
el->el_chared.c_vcmd.action = NOP;
el->el_chared.c_undo.action = NOP;
*el->el_line.lastchar = '\0'; /* just in case */
if (el->el_history.eventno == 0)
return (CC_ERROR);
if (el->el_history.ref == NULL)
return (CC_ERROR);
hp = HIST_FIRST(el);
if (hp == NULL)
return (CC_ERROR);
c_setpat(el); /* Set search pattern !! */
for (h = 1; h < el->el_history.eventno && hp; h++) {
#ifdef SDEBUG
(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
#endif
if ((strncmp(hp, el->el_line.buffer, (size_t)
(el->el_line.lastchar - el->el_line.buffer)) ||
hp[el->el_line.lastchar - el->el_line.buffer]) &&
c_hmatch(el, hp))
found = h;
hp = HIST_NEXT(el);
}
if (!found) { /* is it the current history number? */
if (!c_hmatch(el, el->el_history.buf)) {
#ifdef SDEBUG
(void) fprintf(el->el_errfile, "not found\n");
#endif
return (CC_ERROR);
}
}
el->el_history.eventno = found;
return (hist_get(el));
}
/* ed_prev_line():
* Move up one line
* Could be [k] [^p]
*/
protected el_action_t
/*ARGSUSED*/
ed_prev_line(EditLine *el, int c)
{
char *ptr;
int nchars = c_hpos(el);
/*
* Move to the line requested
*/
if (*(ptr = el->el_line.cursor) == '\n')
ptr--;
for (; ptr >= el->el_line.buffer; ptr--)
if (*ptr == '\n' && --el->el_state.argument <= 0)
break;
if (el->el_state.argument > 0)
return (CC_ERROR);
/*
* Move to the beginning of the line
*/
for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
continue;
/*
* Move to the character requested
*/
for (ptr++;
nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
ptr++)
continue;
el->el_line.cursor = ptr;
return (CC_CURSOR);
}
/* ed_next_line():
* Move down one line
* Could be [j] [^n]
*/
protected el_action_t
/*ARGSUSED*/
ed_next_line(EditLine *el, int c)
{
char *ptr;
int nchars = c_hpos(el);
/*
* Move to the line requested
*/
for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
if (*ptr == '\n' && --el->el_state.argument <= 0)
break;
if (el->el_state.argument > 0)
return (CC_ERROR);
/*
* Move to the character requested
*/
for (ptr++;
nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
ptr++)
continue;
el->el_line.cursor = ptr;
return (CC_CURSOR);
}
/* ed_command():
* Editline extended command
* [M-X] [:]
*/
protected el_action_t
/*ARGSUSED*/
ed_command(EditLine *el, int c)
{
char tmpbuf[EL_BUFSIZ];
int tmplen;
el->el_line.buffer[0] = '\0';
el->el_line.lastchar = el->el_line.buffer;
el->el_line.cursor = el->el_line.buffer;
c_insert(el, 3); /* prompt + ": " */
*el->el_line.cursor++ = '\n';
*el->el_line.cursor++ = ':';
*el->el_line.cursor++ = ' ';
re_refresh(el);
tmplen = c_gets(el, tmpbuf);
tmpbuf[tmplen] = '\0';
el->el_line.buffer[0] = '\0';
el->el_line.lastchar = el->el_line.buffer;
el->el_line.cursor = el->el_line.buffer;
if (parse_line(el, tmpbuf) == -1)
return (CC_ERROR);
else
return (CC_REFRESH);
}
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