172 lines
3.5 KiB
C
172 lines
3.5 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "$Id: v_ulcase.c,v 10.12 2011/12/02 19:58:32 zy Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../common/common.h"
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#include "vi.h"
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static int ulcase(SCR *, recno_t, CHAR_T *, size_t, size_t, size_t);
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/*
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* v_ulcase -- [count]~
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* Toggle upper & lower case letters.
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*
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* !!!
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* Historic vi didn't permit ~ to cross newline boundaries. I can
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* think of no reason why it shouldn't, which at least lets the user
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* auto-repeat through a paragraph.
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*
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* !!!
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* In historic vi, the count was ignored. It would have been better
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* if there had been an associated motion, but it's too late to make
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* that the default now.
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*
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* PUBLIC: int v_ulcase(SCR *, VICMD *);
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*/
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int
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v_ulcase(SCR *sp, VICMD *vp)
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{
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recno_t lno;
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size_t cno, lcnt, len;
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u_long cnt;
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CHAR_T *p;
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lno = vp->m_start.lno;
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cno = vp->m_start.cno;
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for (cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt > 0; cno = 0) {
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/* SOF is an error, EOF is an infinite count sink. */
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if (db_get(sp, lno, 0, &p, &len)) {
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if (lno == 1) {
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v_emsg(sp, NULL, VIM_EMPTY);
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return (1);
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}
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--lno;
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break;
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}
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/* Empty lines decrement the count by one. */
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if (len == 0) {
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--cnt;
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vp->m_final.cno = 0;
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continue;
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}
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if (cno + cnt >= len) {
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lcnt = len - 1;
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cnt -= len - cno;
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vp->m_final.cno = len - 1;
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} else {
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lcnt = cno + cnt - 1;
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cnt = 0;
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vp->m_final.cno = lcnt + 1;
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}
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if (ulcase(sp, lno, p, len, cno, lcnt))
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return (1);
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if (cnt > 0)
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++lno;
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}
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vp->m_final.lno = lno;
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return (0);
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}
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/*
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* v_mulcase -- [count]~[count]motion
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* Toggle upper & lower case letters over a range.
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*
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* PUBLIC: int v_mulcase(SCR *, VICMD *);
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*/
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int
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v_mulcase(SCR *sp, VICMD *vp)
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{
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CHAR_T *p;
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size_t len;
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recno_t lno;
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for (lno = vp->m_start.lno;;) {
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if (db_get(sp, lno, DBG_FATAL, &p, &len))
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return (1);
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if (len != 0 && ulcase(sp, lno, p, len,
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lno == vp->m_start.lno ? vp->m_start.cno : 0,
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!F_ISSET(vp, VM_LMODE) &&
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lno == vp->m_stop.lno ? vp->m_stop.cno : len))
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return (1);
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if (++lno > vp->m_stop.lno)
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break;
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}
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/*
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* XXX
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* I didn't create a new motion command when I added motion semantics
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* for ~. While that's the correct way to do it, that choice would
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* have required changes all over the vi directory for little gain.
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* Instead, we pretend it's a yank command. Note, this means that we
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* follow the cursor motion rules for yank commands, but that seems
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* reasonable to me.
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*/
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return (0);
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}
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/*
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* ulcase --
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* Change part of a line's case.
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*/
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static int
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ulcase(SCR *sp, recno_t lno, CHAR_T *lp, size_t len, size_t scno, size_t ecno)
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{
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size_t blen;
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int change, rval;
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ARG_CHAR_T ch;
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CHAR_T *p, *t, *bp;
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GET_SPACE_RETW(sp, bp, blen, len);
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MEMMOVE(bp, lp, len);
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change = rval = 0;
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for (p = bp + scno, t = bp + ecno + 1; p < t; ++p) {
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ch = (UCHAR_T)*p;
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if (ISLOWER(ch)) {
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*p = TOUPPER(ch);
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change = 1;
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} else if (ISUPPER(ch)) {
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*p = TOLOWER(ch);
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change = 1;
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}
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}
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if (change && db_set(sp, lno, bp, len))
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rval = 1;
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FREE_SPACEW(sp, bp, blen);
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return (rval);
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}
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