freebsd-dev/contrib/nvi/vi/v_ch.c

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/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "$Id: v_ch.c,v 10.11 2011/12/02 19:49:50 zy Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include "../common/common.h"
#include "vi.h"
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static void notfound(SCR *, ARG_CHAR_T);
static void noprev(SCR *);
/*
* v_chrepeat -- [count];
* Repeat the last F, f, T or t search.
*
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* PUBLIC: int v_chrepeat(SCR *, VICMD *);
*/
int
v_chrepeat(SCR *sp, VICMD *vp)
{
vp->character = VIP(sp)->lastckey;
switch (VIP(sp)->csearchdir) {
case CNOTSET:
noprev(sp);
return (1);
case FSEARCH:
return (v_chF(sp, vp));
case fSEARCH:
return (v_chf(sp, vp));
case TSEARCH:
return (v_chT(sp, vp));
case tSEARCH:
return (v_cht(sp, vp));
default:
abort();
}
/* NOTREACHED */
}
/*
* v_chrrepeat -- [count],
* Repeat the last F, f, T or t search in the reverse direction.
*
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* PUBLIC: int v_chrrepeat(SCR *, VICMD *);
*/
int
v_chrrepeat(SCR *sp, VICMD *vp)
{
cdir_t savedir;
int rval;
vp->character = VIP(sp)->lastckey;
savedir = VIP(sp)->csearchdir;
switch (VIP(sp)->csearchdir) {
case CNOTSET:
noprev(sp);
return (1);
case FSEARCH:
rval = v_chf(sp, vp);
break;
case fSEARCH:
rval = v_chF(sp, vp);
break;
case TSEARCH:
rval = v_cht(sp, vp);
break;
case tSEARCH:
rval = v_chT(sp, vp);
break;
default:
abort();
}
VIP(sp)->csearchdir = savedir;
return (rval);
}
/*
* v_cht -- [count]tc
* Search forward in the line for the character before the next
* occurrence of the specified character.
*
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* PUBLIC: int v_cht(SCR *, VICMD *);
*/
int
v_cht(SCR *sp, VICMD *vp)
{
if (v_chf(sp, vp))
return (1);
/*
* v_chf places the cursor on the character, where the 't'
* command wants it to its left. We know this is safe since
* we had to move right for v_chf() to have succeeded.
*/
--vp->m_stop.cno;
/*
* Make any necessary correction to the motion decision made
* by the v_chf routine.
*/
if (!ISMOTION(vp))
vp->m_final = vp->m_stop;
VIP(sp)->csearchdir = tSEARCH;
return (0);
}
/*
* v_chf -- [count]fc
* Search forward in the line for the next occurrence of the
* specified character.
*
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* PUBLIC: int v_chf(SCR *, VICMD *);
*/
int
v_chf(SCR *sp, VICMD *vp)
{
size_t len;
u_long cnt;
int isempty;
ARG_CHAR_T key;
CHAR_T *endp, *p, *startp;
/*
* !!!
* If it's a dot command, it doesn't reset the key for which we're
* searching, e.g. in "df1|f2|.|;", the ';' searches for a '2'.
*/
key = vp->character;
if (!F_ISSET(vp, VC_ISDOT))
VIP(sp)->lastckey = key;
VIP(sp)->csearchdir = fSEARCH;
if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
if (isempty)
goto empty;
return (1);
}
if (len == 0) {
empty: notfound(sp, key);
return (1);
}
endp = (startp = p) + len;
p += vp->m_start.cno;
for (cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt--;) {
while (++p < endp && *p != key);
if (p == endp) {
notfound(sp, key);
return (1);
}
}
vp->m_stop.cno = p - startp;
/*
* Non-motion commands move to the end of the range.
* Delete and yank stay at the start, ignore others.
*/
vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
return (0);
}
/*
* v_chT -- [count]Tc
* Search backward in the line for the character after the next
* occurrence of the specified character.
*
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* PUBLIC: int v_chT(SCR *, VICMD *);
*/
int
v_chT(SCR *sp, VICMD *vp)
{
if (v_chF(sp, vp))
return (1);
/*
* v_chF places the cursor on the character, where the 'T'
* command wants it to its right. We know this is safe since
* we had to move left for v_chF() to have succeeded.
*/
++vp->m_stop.cno;
vp->m_final = vp->m_stop;
VIP(sp)->csearchdir = TSEARCH;
return (0);
}
/*
* v_chF -- [count]Fc
* Search backward in the line for the next occurrence of the
* specified character.
*
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* PUBLIC: int v_chF(SCR *, VICMD *);
*/
int
v_chF(SCR *sp, VICMD *vp)
{
size_t len;
u_long cnt;
int isempty;
ARG_CHAR_T key;
CHAR_T *endp, *p;
/*
* !!!
* If it's a dot command, it doesn't reset the key for which
* we're searching, e.g. in "df1|f2|.|;", the ';' searches
* for a '2'.
*/
key = vp->character;
if (!F_ISSET(vp, VC_ISDOT))
VIP(sp)->lastckey = key;
VIP(sp)->csearchdir = FSEARCH;
if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
if (isempty)
goto empty;
return (1);
}
if (len == 0) {
empty: notfound(sp, key);
return (1);
}
endp = p - 1;
p += vp->m_start.cno;
for (cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt--;) {
while (--p > endp && *p != key);
if (p == endp) {
notfound(sp, key);
return (1);
}
}
vp->m_stop.cno = (p - endp) - 1;
/*
* All commands move to the end of the range. Motion commands
* adjust the starting point to the character before the current
* one.
*/
vp->m_final = vp->m_stop;
if (ISMOTION(vp))
--vp->m_start.cno;
return (0);
}
static void
noprev(SCR *sp)
{
msgq(sp, M_BERR, "178|No previous F, f, T or t search");
}
static void
notfound(SCR *sp, ARG_CHAR_T ch)
{
msgq(sp, M_BERR, "179|%s not found", KEY_NAME(sp, ch));
}