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-rw-r--r--lib/libedit/chared.c709
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diff --git a/lib/libedit/chared.c b/lib/libedit/chared.c
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+++ b/lib/libedit/chared.c
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+/*-
+ * 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.
+ *
+ * $NetBSD: chared.c,v 1.13 2001/04/13 01:04:19 lukem Exp $
+ */
+
+#if !defined(lint) && !defined(SCCSID)
+static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93";
+#endif /* not lint && not SCCSID */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * chared.c: Character editor utilities
+ */
+#include "sys.h"
+
+#include <stdlib.h>
+#include "el.h"
+
+/* value to leave unused in line buffer */
+#define EL_LEAVE 2
+
+/* cv_undo():
+ * Handle state for the vi undo command
+ */
+protected void
+cv_undo(EditLine *el,int action, size_t size, char *ptr)
+{
+ c_undo_t *vu = &el->el_chared.c_undo;
+ vu->action = action;
+ vu->ptr = ptr;
+ vu->isize = size;
+ (void) memcpy(vu->buf, vu->ptr, size);
+#ifdef DEBUG_UNDO
+ (void) fprintf(el->el_errfile, "Undo buffer \"%s\" size = +%d -%d\n",
+ vu->ptr, vu->isize, vu->dsize);
+#endif
+}
+
+
+/* c_insert():
+ * Insert num characters
+ */
+protected void
+c_insert(EditLine *el, int num)
+{
+ char *cp;
+
+ if (el->el_line.lastchar + num >= el->el_line.limit)
+ return; /* can't go past end of buffer */
+
+ if (el->el_line.cursor < el->el_line.lastchar) {
+ /* if I must move chars */
+ for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
+ cp[num] = *cp;
+ }
+ el->el_line.lastchar += num;
+}
+
+
+/* c_delafter():
+ * Delete num characters after the cursor
+ */
+protected void
+c_delafter(EditLine *el, int num)
+{
+
+ if (el->el_line.cursor + num > el->el_line.lastchar)
+ num = el->el_line.lastchar - el->el_line.cursor;
+
+ if (num > 0) {
+ char *cp;
+
+ if (el->el_map.current != el->el_map.emacs)
+ cv_undo(el, INSERT, (size_t)num, el->el_line.cursor);
+
+ for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
+ *cp = cp[num];
+
+ el->el_line.lastchar -= num;
+ }
+}
+
+
+/* c_delbefore():
+ * Delete num characters before the cursor
+ */
+protected void
+c_delbefore(EditLine *el, int num)
+{
+
+ if (el->el_line.cursor - num < el->el_line.buffer)
+ num = el->el_line.cursor - el->el_line.buffer;
+
+ if (num > 0) {
+ char *cp;
+
+ if (el->el_map.current != el->el_map.emacs)
+ cv_undo(el, INSERT, (size_t)num,
+ el->el_line.cursor - num);
+
+ for (cp = el->el_line.cursor - num;
+ cp <= el->el_line.lastchar;
+ cp++)
+ *cp = cp[num];
+
+ el->el_line.lastchar -= num;
+ }
+}
+
+
+/* ce__isword():
+ * Return if p is part of a word according to emacs
+ */
+protected int
+ce__isword(int p)
+{
+ return (isalpha((unsigned char)p) || isdigit((unsigned char)p) || strchr("*?_-.[]~=", p) != NULL);
+}
+
+
+/* cv__isword():
+ * Return type of word for p according to vi
+ */
+protected int
+cv__isword(int p)
+{
+ if (isspace((unsigned char) p))
+ return 0;
+ if ((unsigned char) p == '_' || isalnum((unsigned char) p))
+ return 1;
+ return 2;
+}
+
+
+/* c___isword():
+ * Return if p is part of a space-delimited word (!isspace)
+ */
+protected int
+c___isword(p)
+ int p;
+{
+ return !isspace((unsigned char) p);
+}
+
+
+/* c__prev_word():
+ * Find the previous word
+ */
+protected char *
+c__prev_word(char *p, char *low, int n, int (*wtest)(int))
+{
+ p--;
+
+ while (n--) {
+ while ((p >= low) && !(*wtest)((unsigned char) *p))
+ p--;
+ while ((p >= low) && (*wtest)((unsigned char) *p))
+ p--;
+ }
+
+ /* cp now points to one character before the word */
+ p++;
+ if (p < low)
+ p = low;
+ /* cp now points where we want it */
+ return (p);
+}
+
+
+/* c__next_word():
+ * Find the next word
+ */
+protected char *
+c__next_word(char *p, char *high, int n, int (*wtest)(int))
+{
+ while (n--) {
+ while ((p < high) && !(*wtest)((unsigned char) *p))
+ p++;
+ while ((p < high) && (*wtest)((unsigned char) *p))
+ p++;
+ }
+ if (p > high)
+ p = high;
+ /* p now points where we want it */
+ return (p);
+}
+
+/* cv_next_word():
+ * Find the next word vi style
+ */
+protected char *
+cv_next_word(EditLine *el, char *p, char *high, int n, int (*wtest)(int))
+{
+ int test;
+
+ while (n--) {
+ test = (*wtest)((unsigned char) *p);
+ while ((p < high) && (*wtest)((unsigned char) *p) == test)
+ p++;
+ /*
+ * vi historically deletes with cw only the word preserving the
+ * trailing whitespace! This is not what 'w' does..
+ */
+ if (el->el_chared.c_vcmd.action != (DELETE|INSERT))
+ while ((p < high) && isspace((unsigned char) *p))
+ p++;
+ }
+
+ /* p now points where we want it */
+ if (p > high)
+ return (high);
+ else
+ return (p);
+}
+
+
+/* cv_prev_word():
+ * Find the previous word vi style
+ */
+protected char *
+cv_prev_word(EditLine *el, char *p, char *low, int n, int (*wtest)(int))
+{
+ int test;
+
+ while (n--) {
+ p--;
+ /*
+ * vi historically deletes with cb only the word preserving the
+ * leading whitespace! This is not what 'b' does..
+ */
+ if (el->el_chared.c_vcmd.action != (DELETE|INSERT))
+ while ((p > low) && isspace((unsigned char) *p))
+ p--;
+ test = (*wtest)((unsigned char) *p);
+ while ((p >= low) && (*wtest)((unsigned char) *p) == test)
+ p--;
+ p++;
+ while (isspace((unsigned char) *p))
+ p++;
+ }
+
+ /* p now points where we want it */
+ if (p < low)
+ return (low);
+ else
+ return (p);
+}
+
+
+#ifdef notdef
+/* c__number():
+ * Ignore character p points to, return number appearing after that.
+ * A '$' by itself means a big number; "$-" is for negative; '^' means 1.
+ * Return p pointing to last char used.
+ */
+protected char *
+c__number(
+ char *p, /* character position */
+ int *num, /* Return value */
+ int dval) /* dval is the number to subtract from like $-3 */
+{
+ int i;
+ int sign = 1;
+
+ if (*++p == '^') {
+ *num = 1;
+ return (p);
+ }
+ if (*p == '$') {
+ if (*++p != '-') {
+ *num = 0x7fffffff; /* Handle $ */
+ return (--p);
+ }
+ sign = -1; /* Handle $- */
+ ++p;
+ }
+ for (i = 0; isdigit((unsigned char) *p); i = 10 * i + *p++ - '0')
+ continue;
+ *num = (sign < 0 ? dval - i : i);
+ return (--p);
+}
+#endif
+
+/* cv_delfini():
+ * Finish vi delete action
+ */
+protected void
+cv_delfini(EditLine *el)
+{
+ int size;
+ int oaction;
+
+ if (el->el_chared.c_vcmd.action & INSERT)
+ el->el_map.current = el->el_map.key;
+
+ oaction = el->el_chared.c_vcmd.action;
+ el->el_chared.c_vcmd.action = NOP;
+
+ if (el->el_chared.c_vcmd.pos == 0)
+ return;
+
+
+ if (el->el_line.cursor > el->el_chared.c_vcmd.pos) {
+ size = (int) (el->el_line.cursor - el->el_chared.c_vcmd.pos);
+ c_delbefore(el, size);
+ el->el_line.cursor = el->el_chared.c_vcmd.pos;
+ re_refresh_cursor(el);
+ } else if (el->el_line.cursor < el->el_chared.c_vcmd.pos) {
+ size = (int)(el->el_chared.c_vcmd.pos - el->el_line.cursor);
+ c_delafter(el, size);
+ } else {
+ size = 1;
+ c_delafter(el, size);
+ }
+ switch (oaction) {
+ case DELETE|INSERT:
+ el->el_chared.c_undo.action = DELETE|INSERT;
+ break;
+ case DELETE:
+ el->el_chared.c_undo.action = INSERT;
+ break;
+ case NOP:
+ case INSERT:
+ default:
+ EL_ABORT((el->el_errfile, "Bad oaction %d\n", oaction));
+ break;
+ }
+
+
+ el->el_chared.c_undo.ptr = el->el_line.cursor;
+ el->el_chared.c_undo.dsize = size;
+}
+
+
+#ifdef notdef
+/* ce__endword():
+ * Go to the end of this word according to emacs
+ */
+protected char *
+ce__endword(char *p, char *high, int n)
+{
+ p++;
+
+ while (n--) {
+ while ((p < high) && isspace((unsigned char) *p))
+ p++;
+ while ((p < high) && !isspace((unsigned char) *p))
+ p++;
+ }
+
+ p--;
+ return (p);
+}
+#endif
+
+
+/* cv__endword():
+ * Go to the end of this word according to vi
+ */
+protected char *
+cv__endword(char *p, char *high, int n)
+{
+ p++;
+
+ while (n--) {
+ while ((p < high) && isspace((unsigned char) *p))
+ p++;
+
+ if (isalnum((unsigned char) *p))
+ while ((p < high) && isalnum((unsigned char) *p))
+ p++;
+ else
+ while ((p < high) && !(isspace((unsigned char) *p) ||
+ isalnum((unsigned char) *p)))
+ p++;
+ }
+ p--;
+ return (p);
+}
+
+/* ch_init():
+ * Initialize the character editor
+ */
+protected int
+ch_init(EditLine *el)
+{
+ el->el_line.buffer = (char *) el_malloc(EL_BUFSIZ);
+ if (el->el_line.buffer == NULL)
+ return (-1);
+
+ (void) memset(el->el_line.buffer, 0, EL_BUFSIZ);
+ el->el_line.cursor = el->el_line.buffer;
+ el->el_line.lastchar = el->el_line.buffer;
+ el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - 2];
+
+ el->el_chared.c_undo.buf = (char *) el_malloc(EL_BUFSIZ);
+ if (el->el_chared.c_undo.buf == NULL)
+ return (-1);
+ (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ);
+ el->el_chared.c_undo.action = NOP;
+ el->el_chared.c_undo.isize = 0;
+ el->el_chared.c_undo.dsize = 0;
+ el->el_chared.c_undo.ptr = el->el_line.buffer;
+
+ el->el_chared.c_vcmd.action = NOP;
+ el->el_chared.c_vcmd.pos = el->el_line.buffer;
+ el->el_chared.c_vcmd.ins = el->el_line.buffer;
+
+ el->el_chared.c_kill.buf = (char *) el_malloc(EL_BUFSIZ);
+ if (el->el_chared.c_kill.buf == NULL)
+ return (-1);
+ (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ);
+ el->el_chared.c_kill.mark = el->el_line.buffer;
+ el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
+
+ el->el_map.current = el->el_map.key;
+
+ el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
+ el->el_state.doingarg = 0;
+ el->el_state.metanext = 0;
+ el->el_state.argument = 1;
+ el->el_state.lastcmd = ED_UNASSIGNED;
+
+ el->el_chared.c_macro.nline = NULL;
+ el->el_chared.c_macro.level = -1;
+ el->el_chared.c_macro.macro = (char **) el_malloc(EL_MAXMACRO *
+ sizeof(char *));
+ if (el->el_chared.c_macro.macro == NULL)
+ return (-1);
+ return (0);
+}
+
+/* ch_reset():
+ * Reset the character editor
+ */
+protected void
+ch_reset(EditLine *el)
+{
+ el->el_line.cursor = el->el_line.buffer;
+ el->el_line.lastchar = el->el_line.buffer;
+
+ el->el_chared.c_undo.action = NOP;
+ el->el_chared.c_undo.isize = 0;
+ el->el_chared.c_undo.dsize = 0;
+ el->el_chared.c_undo.ptr = el->el_line.buffer;
+
+ el->el_chared.c_vcmd.action = NOP;
+ el->el_chared.c_vcmd.pos = el->el_line.buffer;
+ el->el_chared.c_vcmd.ins = el->el_line.buffer;
+
+ el->el_chared.c_kill.mark = el->el_line.buffer;
+
+ el->el_map.current = el->el_map.key;
+
+ el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
+ el->el_state.doingarg = 0;
+ el->el_state.metanext = 0;
+ el->el_state.argument = 1;
+ el->el_state.lastcmd = ED_UNASSIGNED;
+
+ el->el_chared.c_macro.level = -1;
+
+ el->el_history.eventno = 0;
+}
+
+/* ch_enlargebufs():
+ * Enlarge line buffer to be able to hold twice as much characters.
+ * Returns 1 if successful, 0 if not.
+ */
+protected int
+ch_enlargebufs(el, addlen)
+ EditLine *el;
+ size_t addlen;
+{
+ size_t sz, newsz;
+ char *newbuffer, *oldbuf, *oldkbuf;
+
+ sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE;
+ newsz = sz * 2;
+ /*
+ * If newly required length is longer than current buffer, we need
+ * to make the buffer big enough to hold both old and new stuff.
+ */
+ if (addlen > sz) {
+ while(newsz - sz < addlen)
+ newsz *= 2;
+ }
+
+ /*
+ * Reallocate line buffer.
+ */
+ newbuffer = el_realloc(el->el_line.buffer, newsz);
+ if (!newbuffer)
+ return 0;
+
+ /* zero the newly added memory, leave old data in */
+ (void) memset(&newbuffer[sz], 0, newsz - sz);
+
+ oldbuf = el->el_line.buffer;
+
+ el->el_line.buffer = newbuffer;
+ el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
+ el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
+ el->el_line.limit = &newbuffer[newsz - EL_LEAVE];
+
+ /*
+ * Reallocate kill buffer.
+ */
+ newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz);
+ if (!newbuffer)
+ return 0;
+
+ /* zero the newly added memory, leave old data in */
+ (void) memset(&newbuffer[sz], 0, newsz - sz);
+
+ oldkbuf = el->el_chared.c_kill.buf;
+
+ el->el_chared.c_kill.buf = newbuffer;
+ el->el_chared.c_kill.last = newbuffer +
+ (el->el_chared.c_kill.last - oldkbuf);
+ el->el_chared.c_kill.mark = el->el_line.buffer +
+ (el->el_chared.c_kill.mark - oldbuf);
+
+ /*
+ * Reallocate undo buffer.
+ */
+ newbuffer = el_realloc(el->el_chared.c_undo.buf, newsz);
+ if (!newbuffer)
+ return 0;
+
+ /* zero the newly added memory, leave old data in */
+ (void) memset(&newbuffer[sz], 0, newsz - sz);
+
+ el->el_chared.c_undo.ptr = el->el_line.buffer +
+ (el->el_chared.c_undo.ptr - oldbuf);
+ el->el_chared.c_undo.buf = newbuffer;
+
+ if (!hist_enlargebuf(el, sz, newsz))
+ return 0;
+
+ return 1;
+}
+
+/* ch_end():
+ * Free the data structures used by the editor
+ */
+protected void
+ch_end(EditLine *el)
+{
+ el_free((ptr_t) el->el_line.buffer);
+ el->el_line.buffer = NULL;
+ el->el_line.limit = NULL;
+ el_free((ptr_t) el->el_chared.c_undo.buf);
+ el->el_chared.c_undo.buf = NULL;
+ el_free((ptr_t) el->el_chared.c_kill.buf);
+ el->el_chared.c_kill.buf = NULL;
+ el_free((ptr_t) el->el_chared.c_macro.macro);
+ el->el_chared.c_macro.macro = NULL;
+ ch_reset(el);
+}
+
+
+/* el_insertstr():
+ * Insert string at cursorI
+ */
+public int
+el_insertstr(EditLine *el, const char *s)
+{
+ size_t len;
+
+ if ((len = strlen(s)) == 0)
+ return (-1);
+ if (el->el_line.lastchar + len >= el->el_line.limit) {
+ if (!ch_enlargebufs(el, len))
+ return (-1);
+ }
+
+ c_insert(el, (int)len);
+ while (*s)
+ *el->el_line.cursor++ = *s++;
+ return (0);
+}
+
+
+/* el_deletestr():
+ * Delete num characters before the cursor
+ */
+public void
+el_deletestr(EditLine *el, int n)
+{
+ if (n <= 0)
+ return;
+
+ if (el->el_line.cursor < &el->el_line.buffer[n])
+ return;
+
+ c_delbefore(el, n); /* delete before dot */
+ el->el_line.cursor -= n;
+ if (el->el_line.cursor < el->el_line.buffer)
+ el->el_line.cursor = el->el_line.buffer;
+}
+
+/* c_gets():
+ * Get a string
+ */
+protected int
+c_gets(EditLine *el, char *buf)
+{
+ char ch;
+ int len = 0;
+
+ for (ch = 0; ch == 0;) {
+ if (el_getc(el, &ch) != 1)
+ return (ed_end_of_file(el, 0));
+ switch (ch) {
+ case '\010': /* Delete and backspace */
+ case '\177':
+ if (len > 1) {
+ *el->el_line.cursor-- = '\0';
+ el->el_line.lastchar = el->el_line.cursor;
+ buf[len--] = '\0';
+ } else {
+ el->el_line.buffer[0] = '\0';
+ el->el_line.lastchar = el->el_line.buffer;
+ el->el_line.cursor = el->el_line.buffer;
+ return (CC_REFRESH);
+ }
+ re_refresh(el);
+ ch = 0;
+ break;
+
+ case '\033': /* ESC */
+ case '\r': /* Newline */
+ case '\n':
+ break;
+
+ default:
+ if (len >= EL_BUFSIZ)
+ term_beep(el);
+ else {
+ buf[len++] = ch;
+ *el->el_line.cursor++ = ch;
+ el->el_line.lastchar = el->el_line.cursor;
+ }
+ re_refresh(el);
+ ch = 0;
+ break;
+ }
+ }
+ buf[len] = ch;
+ return (len);
+}
+
+
+/* c_hpos():
+ * Return the current horizontal position of the cursor
+ */
+protected int
+c_hpos(EditLine *el)
+{
+ char *ptr;
+
+ /*
+ * Find how many characters till the beginning of this line.
+ */
+ if (el->el_line.cursor == el->el_line.buffer)
+ return (0);
+ else {
+ for (ptr = el->el_line.cursor - 1;
+ ptr >= el->el_line.buffer && *ptr != '\n';
+ ptr--)
+ continue;
+ return (el->el_line.cursor - ptr - 1);
+ }
+}
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