1 /* $NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Christos Zoulas of Cornell University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "config.h" 36 #if !defined(lint) && !defined(SCCSID) 37 #if 0 38 static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 __RCSID("$NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos Exp $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 44 /* 45 * hist.c: History access functions 46 */ 47 #include <stdlib.h> 48 #include "el.h" 49 50 /* hist_init(): 51 * Initialization function. 52 */ 53 protected int 54 hist_init(EditLine *el) 55 { 56 57 el->el_history.fun = NULL; 58 el->el_history.ref = NULL; 59 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); 60 el->el_history.sz = EL_BUFSIZ; 61 if (el->el_history.buf == NULL) 62 return (-1); 63 el->el_history.last = el->el_history.buf; 64 return (0); 65 } 66 67 68 /* hist_end(): 69 * clean up history; 70 */ 71 protected void 72 hist_end(EditLine *el) 73 { 74 75 el_free((ptr_t) el->el_history.buf); 76 el->el_history.buf = NULL; 77 } 78 79 80 /* hist_set(): 81 * Set new history interface 82 */ 83 protected int 84 hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr) 85 { 86 87 el->el_history.ref = ptr; 88 el->el_history.fun = fun; 89 return (0); 90 } 91 92 93 /* hist_get(): 94 * Get a history line and update it in the buffer. 95 * eventno tells us the event to get. 96 */ 97 protected el_action_t 98 hist_get(EditLine *el) 99 { 100 const char *hp; 101 int h; 102 103 if (el->el_history.eventno == 0) { /* if really the current line */ 104 (void) strncpy(el->el_line.buffer, el->el_history.buf, 105 el->el_history.sz); 106 el->el_line.lastchar = el->el_line.buffer + 107 (el->el_history.last - el->el_history.buf); 108 109 #ifdef KSHVI 110 if (el->el_map.type == MAP_VI) 111 el->el_line.cursor = el->el_line.buffer; 112 else 113 #endif /* KSHVI */ 114 el->el_line.cursor = el->el_line.lastchar; 115 116 return (CC_REFRESH); 117 } 118 if (el->el_history.ref == NULL) 119 return (CC_ERROR); 120 121 hp = HIST_FIRST(el); 122 123 if (hp == NULL) 124 return (CC_ERROR); 125 126 for (h = 1; h < el->el_history.eventno; h++) 127 if ((hp = HIST_NEXT(el)) == NULL) { 128 el->el_history.eventno = h; 129 return (CC_ERROR); 130 } 131 (void) strlcpy(el->el_line.buffer, hp, 132 (size_t)(el->el_line.limit - el->el_line.buffer)); 133 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); 134 135 if (el->el_line.lastchar > el->el_line.buffer 136 && el->el_line.lastchar[-1] == '\n') 137 el->el_line.lastchar--; 138 if (el->el_line.lastchar > el->el_line.buffer 139 && el->el_line.lastchar[-1] == ' ') 140 el->el_line.lastchar--; 141 #ifdef KSHVI 142 if (el->el_map.type == MAP_VI) 143 el->el_line.cursor = el->el_line.buffer; 144 else 145 #endif /* KSHVI */ 146 el->el_line.cursor = el->el_line.lastchar; 147 148 return (CC_REFRESH); 149 } 150 151 152 /* hist_command() 153 * process a history command 154 */ 155 protected int 156 hist_command(EditLine *el, int argc, const char **argv) 157 { 158 const char *str; 159 int num; 160 HistEvent ev; 161 162 if (el->el_history.ref == NULL) 163 return (-1); 164 165 if (argc == 1 || strcmp(argv[1], "list") == 0) { 166 /* List history entries */ 167 168 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 169 (void) fprintf(el->el_outfile, "%d %s", 170 el->el_history.ev.num, str); 171 return (0); 172 } 173 174 if (argc != 3) 175 return (-1); 176 177 num = (int)strtol(argv[2], NULL, 0); 178 179 if (strcmp(argv[1], "size") == 0) 180 return history(el->el_history.ref, &ev, H_SETSIZE, num); 181 182 if (strcmp(argv[1], "unique") == 0) 183 return history(el->el_history.ref, &ev, H_SETUNIQUE, num); 184 185 return -1; 186 } 187 188 /* hist_enlargebuf() 189 * Enlarge history buffer to specified value. Called from el_enlargebufs(). 190 * Return 0 for failure, 1 for success. 191 */ 192 protected int 193 /*ARGSUSED*/ 194 hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) 195 { 196 char *newbuf; 197 198 newbuf = realloc(el->el_history.buf, newsz); 199 if (!newbuf) 200 return 0; 201 202 (void) memset(&newbuf[oldsz], '\0', newsz - oldsz); 203 204 el->el_history.last = newbuf + 205 (el->el_history.last - el->el_history.buf); 206 el->el_history.buf = newbuf; 207 el->el_history.sz = newsz; 208 209 return 1; 210 } 211