644 lines
14 KiB
C
644 lines
14 KiB
C
/*
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* tw.comp.c: File completion builtin
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sh.h"
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#include "tw.h"
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#include "ed.h"
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#include "tc.h"
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/* #define TDEBUG */
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struct varent completions;
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static int tw_result (const Char *, Char **);
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static Char **tw_find (Char *, struct varent *, int);
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static Char *tw_tok (Char *);
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static int tw_pos (Char *, int);
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static void tw_pr (Char **);
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static int tw_match (const Char *, const Char *, int);
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static void tw_prlist (struct varent *);
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static const Char *tw_dollar (const Char *,Char **, size_t, Char **,
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Char, const char *);
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/* docomplete():
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* Add or list completions in the completion list
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*/
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/*ARGSUSED*/
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void
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docomplete(Char **v, struct command *t)
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{
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struct varent *vp;
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Char *p;
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Char **pp;
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USE(t);
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v++;
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p = *v++;
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if (p == 0)
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tw_prlist(&completions);
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else if (*v == 0) {
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vp = adrof1(strip(p), &completions);
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if (vp && vp->vec)
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tw_pr(vp->vec), xputchar('\n');
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else
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{
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#ifdef TDEBUG
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xprintf("tw_find(%s) \n", short2str(strip(p)));
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#endif /* TDEBUG */
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pp = tw_find(strip(p), &completions, FALSE);
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if (pp)
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tw_pr(pp), xputchar('\n');
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}
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}
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else
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set1(strip(p), saveblk(v), &completions, VAR_READWRITE);
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} /* end docomplete */
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/* douncomplete():
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* Remove completions from the completion list
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*/
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/*ARGSUSED*/
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void
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douncomplete(Char **v, struct command *t)
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{
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USE(t);
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unset1(v, &completions);
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} /* end douncomplete */
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/* tw_prlist():
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* Pretty print a list of variables
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*/
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static void
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tw_prlist(struct varent *p)
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{
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struct varent *c;
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for (;;) {
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while (p->v_left)
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p = p->v_left;
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x:
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if (p->v_parent == 0) /* is it the header? */
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break;
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if (setintr) {
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int old_pintr_disabled;
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pintr_push_enable(&old_pintr_disabled);
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cleanup_until(&old_pintr_disabled);
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}
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xprintf("%s\t", short2str(p->v_name));
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if (p->vec)
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tw_pr(p->vec);
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xputchar('\n');
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if (p->v_right) {
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p = p->v_right;
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continue;
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}
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do {
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c = p;
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p = p->v_parent;
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} while (p->v_right == c);
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goto x;
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}
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} /* end tw_prlist */
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/* tw_pr():
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* Pretty print a completion, adding single quotes around
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* a completion argument and collapsing multiple spaces to one.
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*/
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static void
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tw_pr(Char **cmp)
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{
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int sp, osp;
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Char *ptr;
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for (; *cmp; cmp++) {
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xputchar('\'');
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for (osp = 0, ptr = *cmp; *ptr; ptr++) {
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sp = Isspace(*ptr);
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if (sp && osp)
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continue;
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xputwchar(*ptr);
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osp = sp;
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}
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xputchar('\'');
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if (cmp[1])
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xputchar(' ');
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}
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} /* end tw_pr */
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/* tw_find():
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* Find the first matching completion.
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* For commands we only look at names that start with -
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*/
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static Char **
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tw_find(Char *nam, struct varent *vp, int cmd)
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{
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Char **rv;
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for (vp = vp->v_left; vp; vp = vp->v_right) {
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if (vp->v_left && (rv = tw_find(nam, vp, cmd)) != NULL)
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return rv;
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if (cmd) {
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if (vp->v_name[0] != '-')
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continue;
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if (Gmatch(nam, &vp->v_name[1]) && vp->vec != NULL)
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return vp->vec;
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}
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else
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if (Gmatch(nam, vp->v_name) && vp->vec != NULL)
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return vp->vec;
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}
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return NULL;
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} /* end tw_find */
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/* tw_pos():
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* Return true if the position is within the specified range
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*/
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static int
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tw_pos(Char *ran, int wno)
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{
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Char *p;
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if (ran[0] == '*' && ran[1] == '\0')
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return 1;
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for (p = ran; *p && *p != '-'; p++)
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continue;
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if (*p == '\0') /* range == <number> */
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return wno == getn(ran);
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if (ran == p) /* range = - <number> */
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return wno <= getn(&ran[1]);
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*p++ = '\0';
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if (*p == '\0') /* range = <number> - */
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return getn(ran) <= wno;
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else /* range = <number> - <number> */
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return (getn(ran) <= wno) && (wno <= getn(p));
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} /* end tw_pos */
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/* tw_tok():
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* Return the next word from string, unquoteing it.
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*/
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static Char *
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tw_tok(Char *str)
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{
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static Char *bf = NULL;
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if (str != NULL)
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bf = str;
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/* skip leading spaces */
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for (; *bf && Isspace(*bf); bf++)
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continue;
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for (str = bf; *bf && !Isspace(*bf); bf++) {
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if (ismetahash(*bf))
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return INVPTR;
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*bf = *bf & ~QUOTE;
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}
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if (*bf != '\0')
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*bf++ = '\0';
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return *str ? str : NULL;
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} /* end tw_tok */
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/* tw_match():
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* Match a string against the pattern given.
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* and return the number of matched characters
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* in a prefix of the string.
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*/
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static int
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tw_match(const Char *str, const Char *pat, int exact)
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{
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const Char *estr;
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int rv = exact ? Gmatch(estr = str, pat) : Gnmatch(str, pat, &estr);
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#ifdef TDEBUG
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xprintf("G%smatch(%s, ", exact ? "" : "n", short2str(str));
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xprintf("%s, ", short2str(pat));
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xprintf("%s) = %d [%" TCSH_PTRDIFF_T_FMT "d]\n", short2str(estr), rv,
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estr - str);
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#endif /* TDEBUG */
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return (int) (rv ? estr - str : -1);
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}
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/* tw_result():
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* Return what the completion action should be depending on the
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* string
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*/
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static int
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tw_result(const Char *act, Char **pat)
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{
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int looking;
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static Char* res = NULL;
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Char *p;
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if (res != NULL)
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xfree(res), res = NULL;
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switch (act[0] & ~QUOTE) {
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case 'X':
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looking = TW_COMPLETION;
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break;
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case 'S':
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looking = TW_SIGNAL;
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break;
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case 'a':
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looking = TW_ALIAS;
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break;
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case 'b':
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looking = TW_BINDING;
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break;
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case 'c':
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looking = TW_COMMAND;
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break;
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case 'C':
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looking = TW_PATH | TW_COMMAND;
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break;
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case 'd':
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looking = TW_DIRECTORY;
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break;
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case 'D':
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looking = TW_PATH | TW_DIRECTORY;
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break;
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case 'e':
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looking = TW_ENVVAR;
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break;
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case 'f':
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looking = TW_FILE;
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break;
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#ifdef COMPAT
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case 'p':
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#endif /* COMPAT */
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case 'F':
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looking = TW_PATH | TW_FILE;
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break;
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case 'g':
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looking = TW_GRPNAME;
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break;
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case 'j':
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looking = TW_JOB;
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break;
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case 'l':
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looking = TW_LIMIT;
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break;
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case 'n':
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looking = TW_NONE;
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break;
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case 's':
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looking = TW_SHELLVAR;
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break;
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case 't':
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looking = TW_TEXT;
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break;
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case 'T':
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looking = TW_PATH | TW_TEXT;
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break;
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case 'v':
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looking = TW_VARIABLE;
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break;
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case 'u':
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looking = TW_USER;
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break;
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case 'x':
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looking = TW_EXPLAIN;
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break;
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case '$':
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*pat = res = Strsave(&act[1]);
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(void) strip(res);
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return(TW_VARLIST);
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case '(':
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*pat = res = Strsave(&act[1]);
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if ((p = Strchr(res, ')')) != NULL)
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*p = '\0';
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(void) strip(res);
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return TW_WORDLIST;
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case '`':
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res = Strsave(act);
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if ((p = Strchr(&res[1], '`')) != NULL)
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*++p = '\0';
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if (didfds == 0) {
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/*
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* Make sure that we have some file descriptors to
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* play with, so that the processes have at least 0, 1, 2
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* open
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*/
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(void) dcopy(SHIN, 0);
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(void) dcopy(SHOUT, 1);
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(void) dcopy(SHDIAG, 2);
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}
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if ((p = globone(res, G_APPEND)) != NULL) {
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xfree(res), res = NULL;
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*pat = res = Strsave(p);
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xfree(p);
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return TW_WORDLIST;
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}
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return TW_ZERO;
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default:
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stderror(ERR_COMPCOM, short2str(act));
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return TW_ZERO;
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}
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switch (act[1] & ~QUOTE) {
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case '\0':
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return looking;
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case ':':
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*pat = res = Strsave(&act[2]);
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(void) strip(res);
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return looking;
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default:
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stderror(ERR_COMPCOM, short2str(act));
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return TW_ZERO;
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}
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} /* end tw_result */
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/* tw_dollar():
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* Expand $<n> args in buffer
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*/
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static const Char *
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tw_dollar(const Char *str, Char **wl, size_t nwl, Char **result, Char sep,
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const char *msg)
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{
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struct Strbuf buf = Strbuf_INIT;
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Char *res;
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const Char *sp;
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for (sp = str; *sp && *sp != sep;)
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if (sp[0] == '$' && sp[1] == ':' && Isdigit(sp[sp[2] == '-' ? 3 : 2])) {
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int num, neg = 0;
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sp += 2;
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if (*sp == '-') {
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neg = 1;
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sp++;
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}
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for (num = *sp++ - '0'; Isdigit(*sp); num += 10 * num + *sp++ - '0')
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continue;
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if (neg)
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num = nwl - num - 1;
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if (num >= 0 && (size_t)num < nwl)
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Strbuf_append(&buf, wl[num]);
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}
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else
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Strbuf_append1(&buf, *sp++);
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res = Strbuf_finish(&buf);
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if (*sp++ == sep) {
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*result = res;
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return sp;
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}
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xfree(res);
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/* Truncates data if WIDE_STRINGS */
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stderror(ERR_COMPMIS, (int)sep, msg, short2str(str));
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return --sp;
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} /* end tw_dollar */
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/* tw_complete():
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* Return the appropriate completion for the command
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*
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* valid completion strings are:
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* p/<range>/<completion>/[<suffix>/] positional
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* c/<pattern>/<completion>/[<suffix>/] current word ignore pattern
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* C/<pattern>/<completion>/[<suffix>/] current word with pattern
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* n/<pattern>/<completion>/[<suffix>/] next word
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* N/<pattern>/<completion>/[<suffix>/] next-next word
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*/
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int
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tw_complete(const Char *line, Char **word, Char **pat, int looking, eChar *suf)
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{
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Char *buf, **vec, **wl;
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static Char nomatch[2] = { (Char) ~0, 0x00 };
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const Char *ptr;
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size_t wordno;
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int n;
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buf = Strsave(line);
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cleanup_push(buf, xfree);
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/* Single-character words, empty current word, terminating NULL */
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wl = xmalloc(((Strlen(line) + 1) / 2 + 2) * sizeof (*wl));
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cleanup_push(wl, xfree);
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/* find the command */
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if ((wl[0] = tw_tok(buf)) == NULL || wl[0] == INVPTR) {
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cleanup_until(buf);
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return TW_ZERO;
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}
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/*
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* look for hardwired command completions using a globbing
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* search and for arguments using a normal search.
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*/
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if ((vec = tw_find(wl[0], &completions, (looking == TW_COMMAND)))
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== NULL) {
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cleanup_until(buf);
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return looking;
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}
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/* tokenize the line one more time :-( */
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for (wordno = 1; (wl[wordno] = tw_tok(NULL)) != NULL &&
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wl[wordno] != INVPTR; wordno++)
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continue;
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if (wl[wordno] == INVPTR) { /* Found a meta character */
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cleanup_until(buf);
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return TW_ZERO; /* de-activate completions */
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}
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#ifdef TDEBUG
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{
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size_t i;
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for (i = 0; i < wordno; i++)
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xprintf("'%s' ", short2str(wl[i]));
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xprintf("\n");
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}
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#endif /* TDEBUG */
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/* if the current word is empty move the last word to the next */
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if (**word == '\0') {
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wl[wordno] = *word;
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wordno++;
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}
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wl[wordno] = NULL;
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#ifdef TDEBUG
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xprintf("\r\n");
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xprintf(" w#: %lu\n", (unsigned long)wordno);
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xprintf("line: %s\n", short2str(line));
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xprintf(" cmd: %s\n", short2str(wl[0]));
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xprintf("word: %s\n", short2str(*word));
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xprintf("last: %s\n", wordno >= 2 ? short2str(wl[wordno-2]) : "n/a");
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xprintf("this: %s\n", wordno >= 1 ? short2str(wl[wordno-1]) : "n/a");
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#endif /* TDEBUG */
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for (;vec != NULL && (ptr = vec[0]) != NULL; vec++) {
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Char *ran, /* The pattern or range X/<range>/XXXX/ */
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*com, /* The completion X/XXXXX/<completion>/ */
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*pos = NULL; /* scratch pointer */
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int cmd, res;
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Char sep; /* the command and separator characters */
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int exact;
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if (ptr[0] == '\0')
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continue;
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#ifdef TDEBUG
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xprintf("match %s\n", short2str(ptr));
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#endif /* TDEBUG */
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switch (cmd = ptr[0]) {
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case 'N':
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pos = (wordno < 3) ? nomatch : wl[wordno - 3];
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break;
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case 'n':
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pos = (wordno < 2) ? nomatch : wl[wordno - 2];
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break;
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case 'c':
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case 'C':
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pos = (wordno < 1) ? nomatch : wl[wordno - 1];
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break;
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case 'p':
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break;
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default:
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stderror(ERR_COMPINV, CGETS(27, 1, "command"), cmd);
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return TW_ZERO;
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}
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sep = ptr[1];
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if (!Ispunct(sep)) {
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/* Truncates data if WIDE_STRINGS */
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stderror(ERR_COMPINV, CGETS(27, 2, "separator"), (int)sep);
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return TW_ZERO;
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}
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|
|
ptr = tw_dollar(&ptr[2], wl, wordno, &ran, sep,
|
|
CGETS(27, 3, "pattern"));
|
|
cleanup_push(ran, xfree);
|
|
if (ran[0] == '\0') /* check for empty pattern (disallowed) */
|
|
{
|
|
stderror(ERR_COMPINC, cmd == 'p' ? CGETS(27, 4, "range") :
|
|
CGETS(27, 3, "pattern"), "");
|
|
return TW_ZERO;
|
|
}
|
|
|
|
ptr = tw_dollar(ptr, wl, wordno, &com, sep,
|
|
CGETS(27, 5, "completion"));
|
|
cleanup_push(com, xfree);
|
|
|
|
if (*ptr != '\0') {
|
|
if (*ptr == sep)
|
|
*suf = CHAR_ERR;
|
|
else
|
|
*suf = *ptr;
|
|
}
|
|
else
|
|
*suf = '\0';
|
|
|
|
#ifdef TDEBUG
|
|
xprintf("command: %c\nseparator: %c\n", cmd, (int)sep);
|
|
xprintf("pattern: %s\n", short2str(ran));
|
|
xprintf("completion: %s\n", short2str(com));
|
|
xprintf("suffix: ");
|
|
switch (*suf) {
|
|
case 0:
|
|
xprintf("*auto suffix*\n");
|
|
break;
|
|
case CHAR_ERR:
|
|
xprintf("*no suffix*\n");
|
|
break;
|
|
default:
|
|
xprintf("%c\n", (int)*suf);
|
|
break;
|
|
}
|
|
#endif /* TDEBUG */
|
|
|
|
exact = 0;
|
|
switch (cmd) {
|
|
case 'p': /* positional completion */
|
|
#ifdef TDEBUG
|
|
xprintf("p: tw_pos(%s, %lu) = ", short2str(ran),
|
|
(unsigned long)wordno - 1);
|
|
xprintf("%d\n", tw_pos(ran, wordno - 1));
|
|
#endif /* TDEBUG */
|
|
if (!tw_pos(ran, wordno - 1)) {
|
|
cleanup_until(ran);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case 'N': /* match with the next-next word */
|
|
case 'n': /* match with the next word */
|
|
exact = 1;
|
|
/*FALLTHROUGH*/
|
|
case 'c': /* match with the current word */
|
|
case 'C':
|
|
#ifdef TDEBUG
|
|
xprintf("%c: ", cmd);
|
|
#endif /* TDEBUG */
|
|
if ((n = tw_match(pos, ran, exact)) < 0) {
|
|
cleanup_until(ran);
|
|
continue;
|
|
}
|
|
if (cmd == 'c')
|
|
*word += n;
|
|
break;
|
|
|
|
default:
|
|
abort(); /* Cannot happen */
|
|
}
|
|
tsetenv(STRCOMMAND_LINE, line);
|
|
res = tw_result(com, pat);
|
|
Unsetenv(STRCOMMAND_LINE);
|
|
cleanup_until(buf);
|
|
return res;
|
|
}
|
|
cleanup_until(buf);
|
|
*suf = '\0';
|
|
return TW_ZERO;
|
|
} /* end tw_complete */
|