/*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rodney Ruddock of the University of Guelph. * * 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[] = "@(#)z.c 8.1 (Berkeley) 5/31/93"; #endif /* not lint */ #include <sys/types.h> #include <regex.h> #include <setjmp.h> #include <stdio.h> #include <string.h> #ifdef DBI #include <db.h> #endif #include "ed.h" #include "extern.h" /* * This prints out the next group of lines (as spec'd by the skicky * number; 22 by default). It's really useful for scrolling in chunks * through the buffer (better than l, n, or p). Shame on POSIX for * not including it; yaaa! BSD for keeping it! :-) */ void z(inputt, errnum) FILE *inputt; int *errnum; { register int l_cnt; if (current == NULL) { *errnum = -1; strcpy(help_msg, "buffer empty"); return; } /* Set zsnum if need be here. */ ss = getc(inputt); if ((ss > 48) && (ss < 57)) /* Default set in main. */ zsnum = dig_num_conv(inputt, errnum); else if ((ss != '\n') && (ss != EOF)) { ungetc(ss, inputt); if (rol(inputt, errnum)) return; } if (top == NULL) { strcpy(help_msg, "buffer empty"); *errnum = -1; ungetc('\n', inputt); return; } if (End_default) { if ((current->below) != NULL) Start = current->below; else { strcpy(help_msg, "at end of buffer"); *errnum = -1; ungetc('\n', inputt); return; } } else Start = End; if (Start == NULL) { strcpy(help_msg, "bad address"); *errnum = -1; ungetc('\n', inputt); return; } Start_default = End_default = 0; current = Start; l_cnt = 1; /* Yes, set to = 1. */ while (1) { /* Scroll-out the next 'zsnum' of lines or until bottom. */ if (current == NULL) break; if (sigint_flag && (!sigspecial)) SIGINT_ACTION; get_line(current->handle, current->len); printf("%s\n", text); if (current == bottom) break; l_cnt++; if (zsnum < l_cnt) break; current = current->below; } *errnum = 1; }