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/* 36 * hist.c: History access functions 37 */ 38#include "sys.h" 39#include <stdlib.h> 40#include "el.h" 41 42/* hist_init(): 43 * Initialization function. 44 */ 45int 46hist_init(EditLine *el) 47{ 48 49 el->el_history.fun = NULL; 50 el->el_history.ref = NULL; 51 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); 52 el->el_history.sz = EL_BUFSIZ; 53 if (el->el_history.buf == NULL) 54 return (-1); 55 el->el_history.last = el->el_history.buf; 56 return (0); 57} 58 59 60/* hist_end(): 61 * clean up history; 62 */ 63void 64hist_end(EditLine *el) 65{ 66 67 el_free((ptr_t) el->el_history.buf); 68 el->el_history.buf = NULL; 69} 70 71 72/* hist_set(): 73 * Set new history interface 74 */ 75int 76hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr) 77{ 78 79 el->el_history.ref = ptr; 80 el->el_history.fun = fun; 81 return (0); 82} 83 84 85/* hist_get(): 86 * Get a history line and update it in the buffer. 87 * eventno tells us the event to get. 88 */ 89el_action_t 90hist_get(EditLine *el) 91{ 92 const char *hp; 93 int h; 94 95 if (el->el_history.eventno == 0) { /* if really the current line */ 96 (void) strncpy(el->el_line.buffer, el->el_history.buf, 97 el->el_history.sz); 98 el->el_line.lastchar = el->el_line.buffer + 99 (el->el_history.last - el->el_history.buf); 100 101#ifdef KSHVI 102 if (el->el_map.type == MAP_VI) 103 el->el_line.cursor = el->el_line.buffer; 104 else 105#endif /* KSHVI */ 106 el->el_line.cursor = el->el_line.lastchar; 107 108 return (CC_REFRESH); 109 } 110 if (el->el_history.ref == NULL) 111 return (CC_ERROR); 112 113 hp = HIST_FIRST(el); 114 115 if (hp == NULL) 116 return (CC_ERROR); 117 118 for (h = 1; h < el->el_history.eventno; h++) 119 if ((hp = HIST_NEXT(el)) == NULL) { 120 el->el_history.eventno = h; 121 return (CC_ERROR); 122 } 123 (void) strlcpy(el->el_line.buffer, hp, 124 (size_t)(el->el_line.limit - el->el_line.buffer)); 125 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); 126 127 if (el->el_line.lastchar > el->el_line.buffer 128 && el->el_line.lastchar[-1] == '\n') 129 el->el_line.lastchar--; 130 if (el->el_line.lastchar > el->el_line.buffer 131 && el->el_line.lastchar[-1] == ' ') 132 el->el_line.lastchar--; 133#ifdef KSHVI 134 if (el->el_map.type == MAP_VI) 135 el->el_line.cursor = el->el_line.buffer; 136 else 137#endif /* KSHVI */ 138 el->el_line.cursor = el->el_line.lastchar; 139 140 return (CC_REFRESH); 141} 142 143 144/* hist_command() 145 * process a history command 146 */ 147int 148hist_command(EditLine *el, int argc, const char **argv) 149{ 150 const char *str; 151 int num; 152 HistEvent ev; 153 154 if (el->el_history.ref == NULL) 155 return (-1); 156 157 if (argc == 1 || strcmp(argv[1], "list") == 0) { 158 /* List history entries */ 159 160 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 161 (void) fprintf(el->el_outfile, "%d %s", 162 el->el_history.ev.num, str); 163 return (0); 164 } 165 166 if (argc != 3) 167 return (-1); 168 169 num = (int)strtol(argv[2], NULL, 0); 170 171 if (strcmp(argv[1], "size") == 0) 172 return history(el->el_history.ref, &ev, H_SETSIZE, num); 173 174 if (strcmp(argv[1], "unique") == 0) 175 return history(el->el_history.ref, &ev, H_SETUNIQUE, num); 176 177 return -1; 178} 179 180/* hist_enlargebuf() 181 * Enlarge history buffer to specified value. Called from el_enlargebufs(). 182 * Return 0 for failure, 1 for success. 183 */ 184int 185/*ARGSUSED*/ 186hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) 187{ 188 char *newbuf; 189 190 newbuf = realloc(el->el_history.buf, newsz); 191 if (!newbuf) 192 return 0; 193 194 (void) memset(&newbuf[oldsz], '\0', newsz - oldsz); 195 196 el->el_history.last = newbuf + 197 (el->el_history.last - el->el_history.buf); 198 el->el_history.buf = newbuf; 199 el->el_history.sz = newsz; 200 201 return 1; 202} 203