1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 23*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 24*7c478bd9Sstevel@tonic-gate 25*7c478bd9Sstevel@tonic-gate 26*7c478bd9Sstevel@tonic-gate /* 27*7c478bd9Sstevel@tonic-gate * Copyright (c) 1999 by Sun Microsystems, Inc. 28*7c478bd9Sstevel@tonic-gate * All rights reserved. 29*7c478bd9Sstevel@tonic-gate */ 30*7c478bd9Sstevel@tonic-gate 31*7c478bd9Sstevel@tonic-gate /* 32*7c478bd9Sstevel@tonic-gate * cscope - interactive C symbol or text cross-reference 33*7c478bd9Sstevel@tonic-gate * 34*7c478bd9Sstevel@tonic-gate * command history 35*7c478bd9Sstevel@tonic-gate */ 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate #include <stdio.h> 38*7c478bd9Sstevel@tonic-gate #include "global.h" 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate HISTORY *head, *tail, *current; 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate /* add a cmd to the history list */ 43*7c478bd9Sstevel@tonic-gate void addcmd(int f,char * s)44*7c478bd9Sstevel@tonic-gateaddcmd(int f, char *s) 45*7c478bd9Sstevel@tonic-gate { 46*7c478bd9Sstevel@tonic-gate HISTORY *h; 47*7c478bd9Sstevel@tonic-gate 48*7c478bd9Sstevel@tonic-gate h = (HISTORY *)mymalloc(sizeof (HISTORY)); 49*7c478bd9Sstevel@tonic-gate if (tail) { 50*7c478bd9Sstevel@tonic-gate tail->next = h; 51*7c478bd9Sstevel@tonic-gate h->next = 0; 52*7c478bd9Sstevel@tonic-gate h->previous = tail; 53*7c478bd9Sstevel@tonic-gate tail = h; 54*7c478bd9Sstevel@tonic-gate } else { 55*7c478bd9Sstevel@tonic-gate head = tail = h; 56*7c478bd9Sstevel@tonic-gate h->next = h->previous = 0; 57*7c478bd9Sstevel@tonic-gate } 58*7c478bd9Sstevel@tonic-gate h->field = f; 59*7c478bd9Sstevel@tonic-gate h->text = stralloc(s); 60*7c478bd9Sstevel@tonic-gate current = 0; 61*7c478bd9Sstevel@tonic-gate } 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate /* return previous history item */ 64*7c478bd9Sstevel@tonic-gate 65*7c478bd9Sstevel@tonic-gate HISTORY * prevcmd(void)66*7c478bd9Sstevel@tonic-gateprevcmd(void) 67*7c478bd9Sstevel@tonic-gate { 68*7c478bd9Sstevel@tonic-gate if (current) { 69*7c478bd9Sstevel@tonic-gate if (current->previous) /* stay on first item */ 70*7c478bd9Sstevel@tonic-gate return (current = current->previous); 71*7c478bd9Sstevel@tonic-gate else 72*7c478bd9Sstevel@tonic-gate return (current); 73*7c478bd9Sstevel@tonic-gate } else if (tail) 74*7c478bd9Sstevel@tonic-gate return (current = tail); 75*7c478bd9Sstevel@tonic-gate else 76*7c478bd9Sstevel@tonic-gate return (NULL); 77*7c478bd9Sstevel@tonic-gate } 78*7c478bd9Sstevel@tonic-gate 79*7c478bd9Sstevel@tonic-gate /* return next history item */ 80*7c478bd9Sstevel@tonic-gate 81*7c478bd9Sstevel@tonic-gate HISTORY * nextcmd(void)82*7c478bd9Sstevel@tonic-gatenextcmd(void) 83*7c478bd9Sstevel@tonic-gate { 84*7c478bd9Sstevel@tonic-gate if (current) { 85*7c478bd9Sstevel@tonic-gate if (current->next) /* stay on first item */ 86*7c478bd9Sstevel@tonic-gate return (current = current->next); 87*7c478bd9Sstevel@tonic-gate else 88*7c478bd9Sstevel@tonic-gate return (current); 89*7c478bd9Sstevel@tonic-gate } else 90*7c478bd9Sstevel@tonic-gate return (NULL); 91*7c478bd9Sstevel@tonic-gate } 92*7c478bd9Sstevel@tonic-gate 93*7c478bd9Sstevel@tonic-gate /* reset current to tail */ 94*7c478bd9Sstevel@tonic-gate 95*7c478bd9Sstevel@tonic-gate void resetcmd(void)96*7c478bd9Sstevel@tonic-gateresetcmd(void) 97*7c478bd9Sstevel@tonic-gate { 98*7c478bd9Sstevel@tonic-gate current = 0; 99*7c478bd9Sstevel@tonic-gate } 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate HISTORY * currentcmd(void)102*7c478bd9Sstevel@tonic-gatecurrentcmd(void) 103*7c478bd9Sstevel@tonic-gate { 104*7c478bd9Sstevel@tonic-gate return (current); 105*7c478bd9Sstevel@tonic-gate } 106