/*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * 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. */ #ifndef lint static char sccsid[] = "@(#)v_ulcase.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include <ctype.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include "vi.h" #include "vcmd.h" /* * v_ulcase -- [count]~ * This function toggles upper & lower case letters. In historic * vi, the count was ignored. It would have been better if there * had been an associated motion, but it's too late to change it * now. */ int v_ulcase(sp, ep, vp, fm, tm, rp) SCR *sp; EXF *ep; VICMDARG *vp; MARK *fm, *tm, *rp; { recno_t lno; size_t blen, lcnt, len; u_long cnt; int ch, change, rval; char *bp, *p; /* Figure out what memory to use. */ GET_SPACE(sp, bp, blen, 256); /* * Historic vi didn't permit ~ to cross newline boundaries. * I can think of no reason why it shouldn't, which at least * lets you auto-repeat through a paragraph. */ rval = 0; for (change = -1, cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt;) { /* Get the line; EOF is an infinite sink. */ if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) { if (file_lline(sp, ep, &lno)) return (1); if (lno >= fm->lno) { GETLINE_ERR(sp, fm->lno); rval = 1; break; } if (change == -1) { v_eof(sp, ep, NULL); return (1); } break; } /* Set current line number. */ lno = fm->lno; /* Empty lines just decrement the count. */ if (len == 0) { --cnt; ++fm->lno; fm->cno = 0; change = 0; continue; } /* Get a copy of the line. */ ADD_SPACE(sp, bp, blen, len); memmove(bp, p, len); /* Set starting pointer. */ if (change == -1) p = bp + fm->cno; else p = bp; /* * Figure out how many characters get changed in this * line. Set the final cursor column. */ if (fm->cno + cnt >= len) { lcnt = len - fm->cno; ++fm->lno; fm->cno = 0; } else fm->cno += lcnt = cnt; cnt -= lcnt; /* Change the line. */ for (change = 0; lcnt--; ++p) { ch = *(u_char *)p; if (islower(ch)) { *p = toupper(ch); change = 1; } else if (isupper(ch)) { *p = tolower(ch); change = 1; } } /* Update the line if necessary. */ if (change && file_sline(sp, ep, lno, bp, len)) { rval = 1; break; } } /* If changed lines, could be on an illegal line. */ if (fm->lno != lno && file_gline(sp, ep, fm->lno, &len) == NULL) { --fm->lno; fm->cno = len ? len - 1 : 0; } *rp = *fm; FREE_SPACE(sp, bp, blen); return (rval); }