1 /* $OpenBSD: hist.c,v 1.5 2003/06/02 20:18:40 millert Exp $ */ 2 /* $NetBSD: hist.c,v 1.2 1997/01/11 06:47:55 lukem Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Christos Zoulas of Cornell University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #if !defined(lint) && !defined(SCCSID) 37 #if 0 38 static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 static const char rcsid[] = "$OpenBSD: hist.c,v 1.5 2003/06/02 20:18:40 millert Exp $"; 41 #endif 42 #endif /* not lint && not SCCSID */ 43 44 /* 45 * hist.c: History access functions 46 */ 47 #include "sys.h" 48 #include <stdlib.h> 49 #include "el.h" 50 51 /* hist_init(): 52 * Initialization function. 53 */ 54 protected int 55 hist_init(el) 56 EditLine *el; 57 { 58 el->el_history.fun = NULL; 59 el->el_history.ref = NULL; 60 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); 61 el->el_history.last = el->el_history.buf; 62 return 0; 63 } 64 65 66 /* hist_end(): 67 * clean up history; 68 */ 69 protected void 70 hist_end(el) 71 EditLine *el; 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 */ 81 protected int 82 hist_set(el, fun, ptr) 83 EditLine *el; 84 hist_fun_t fun; 85 ptr_t ptr; 86 87 { 88 el->el_history.ref = ptr; 89 el->el_history.fun = fun; 90 return 0; 91 } 92 93 94 /* hist_get(): 95 * Get a history line and update it in the buffer. 96 * eventno tells us the event to get. 97 */ 98 protected el_action_t 99 hist_get(el) 100 EditLine *el; 101 { 102 const char *hp; 103 int h; 104 105 if (el->el_history.eventno == 0) { /* if really the current line */ 106 (void)strncpy(el->el_line.buffer, el->el_history.buf, EL_BUFSIZ - 1); 107 el->el_line.buffer[EL_BUFSIZ - 1] = '\0'; 108 el->el_line.lastchar = el->el_line.buffer + 109 (el->el_history.last - el->el_history.buf); 110 111 #ifdef KSHVI 112 if (el->el_map.type == MAP_VI) 113 el->el_line.cursor = el->el_line.buffer; 114 else 115 #endif /* KSHVI */ 116 el->el_line.cursor = el->el_line.lastchar; 117 118 return CC_REFRESH; 119 } 120 121 if (el->el_history.ref == NULL) 122 return CC_ERROR; 123 124 hp = HIST_FIRST(el); 125 126 if (hp == NULL) 127 return CC_ERROR; 128 129 for (h = 1; h < el->el_history.eventno; h++) 130 if ((hp = HIST_NEXT(el)) == NULL) { 131 el->el_history.eventno = h; 132 return CC_ERROR; 133 } 134 135 (void)strncpy(el->el_line.buffer, hp, EL_BUFSIZ - 1); 136 el->el_line.buffer[EL_BUFSIZ - 1] = '\0'; 137 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); 138 139 if (el->el_line.lastchar > el->el_line.buffer) { 140 if (el->el_line.lastchar[-1] == '\n') 141 el->el_line.lastchar--; 142 if (el->el_line.lastchar[-1] == ' ') 143 el->el_line.lastchar--; 144 if (el->el_line.lastchar < el->el_line.buffer) 145 el->el_line.lastchar = el->el_line.buffer; 146 } 147 148 #ifdef KSHVI 149 if (el->el_map.type == MAP_VI) 150 el->el_line.cursor = el->el_line.buffer; 151 else 152 #endif /* KSHVI */ 153 el->el_line.cursor = el->el_line.lastchar; 154 155 return CC_REFRESH; 156 } 157 158 /* hist_list() 159 * List history entries 160 */ 161 protected int 162 /*ARGSUSED*/ 163 hist_list(el, argc, argv) 164 EditLine *el; 165 int argc; 166 char **argv; 167 { 168 const char *str; 169 170 if (el->el_history.ref == NULL) 171 return -1; 172 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 173 (void)fprintf(el->el_outfile, "%d %s", el->el_history.ev->num, str); 174 return 0; 175 } 176