1/*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Christos Zoulas of Cornell University. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos Exp $ 33 */ 34 35#if !defined(lint) && !defined(SCCSID) 36static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93"; 37#endif /* not lint && not SCCSID */ 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD$"); 40 41/* 42 * hist.c: History access functions 43 */ 44#include "sys.h" 45#include <stdlib.h> 46#include "el.h" 47 48/* hist_init(): 49 * Initialization function. 50 */ 51protected int 52hist_init(EditLine *el) 53{ 54 55 el->el_history.fun = NULL; 56 el->el_history.ref = NULL; 57 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); 58 el->el_history.sz = EL_BUFSIZ; 59 if (el->el_history.buf == NULL) 60 return (-1); 61 el->el_history.last = el->el_history.buf; 62 return (0); 63} 64 65 66/* hist_end(): 67 * clean up history; 68 */ 69protected void 70hist_end(EditLine *el) 71{ 72 73 el_free((ptr_t) el->el_history.buf); 74 el->el_history.buf = NULL; 75} 76 77 78/* hist_set(): 79 * Set new history interface 80 */ 81protected int 82hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr) 83{ 84 85 el->el_history.ref = ptr; 86 el->el_history.fun = fun; 87 return (0); 88} 89 90 91/* hist_get(): 92 * Get a history line and update it in the buffer. 93 * eventno tells us the event to get. 94 */ 95protected el_action_t 96hist_get(EditLine *el) 97{ 98 const char *hp; 99 int h; 100 101 if (el->el_history.eventno == 0) { /* if really the current line */ 102 (void) strncpy(el->el_line.buffer, el->el_history.buf, 103 el->el_history.sz); 104 el->el_line.lastchar = el->el_line.buffer + 105 (el->el_history.last - el->el_history.buf); 106 107#ifdef KSHVI 108 if (el->el_map.type == MAP_VI) 109 el->el_line.cursor = el->el_line.buffer; 110 else 111#endif /* KSHVI */ 112 el->el_line.cursor = el->el_line.lastchar; 113 114 return (CC_REFRESH); 115 } 116 if (el->el_history.ref == NULL) 117 return (CC_ERROR); 118 119 hp = HIST_FIRST(el); 120 121 if (hp == NULL) 122 return (CC_ERROR); 123 124 for (h = 1; h < el->el_history.eventno; h++) 125 if ((hp = HIST_NEXT(el)) == NULL) { 126 el->el_history.eventno = h; 127 return (CC_ERROR); 128 } 129 (void) strlcpy(el->el_line.buffer, hp, 130 (size_t)(el->el_line.limit - el->el_line.buffer)); 131 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); 132 133 if (el->el_line.lastchar > el->el_line.buffer 134 && el->el_line.lastchar[-1] == '\n') 135 el->el_line.lastchar--; 136 if (el->el_line.lastchar > el->el_line.buffer 137 && el->el_line.lastchar[-1] == ' ') 138 el->el_line.lastchar--; 139#ifdef KSHVI 140 if (el->el_map.type == MAP_VI) 141 el->el_line.cursor = el->el_line.buffer; 142 else 143#endif /* KSHVI */ 144 el->el_line.cursor = el->el_line.lastchar; 145 146 return (CC_REFRESH); 147} 148 149 150/* hist_command() 151 * process a history command 152 */ 153protected int 154hist_command(EditLine *el, int argc, const char **argv) 155{ 156 const char *str; 157 int num; 158 HistEvent ev; 159 160 if (el->el_history.ref == NULL) 161 return (-1); 162 163 if (argc == 1 || strcmp(argv[1], "list") == 0) { 164 /* List history entries */ 165 166 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 167 (void) fprintf(el->el_outfile, "%d %s", 168 el->el_history.ev.num, str); 169 return (0); 170 } 171 172 if (argc != 3) 173 return (-1); 174 175 num = (int)strtol(argv[2], NULL, 0); 176 177 if (strcmp(argv[1], "size") == 0) 178 return history(el->el_history.ref, &ev, H_SETSIZE, num); 179 180 if (strcmp(argv[1], "unique") == 0) 181 return history(el->el_history.ref, &ev, H_SETUNIQUE, num); 182 183 return -1; 184} 185 186/* hist_enlargebuf() 187 * Enlarge history buffer to specified value. Called from el_enlargebufs(). 188 * Return 0 for failure, 1 for success. 189 */ 190protected int 191/*ARGSUSED*/ 192hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) 193{ 194 char *newbuf; 195 196 newbuf = realloc(el->el_history.buf, newsz); 197 if (!newbuf) 198 return 0; 199 200 (void) memset(&newbuf[oldsz], '\0', newsz - oldsz); 201 202 el->el_history.last = newbuf + 203 (el->el_history.last - el->el_history.buf); 204 el->el_history.buf = newbuf; 205 el->el_history.sz = newsz; 206 207 return 1; 208} 209