1/* $NetBSD: hist.c,v 1.5 2005/06/09 16:48:57 lukem Exp $ */ 2/* from NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos 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#include "tnftp.h" 37#include "sys.h" 38 39/* 40 * hist.c: History access functions 41 */ 42#include <stdlib.h> 43#include "el.h" 44 45/* hist_init(): 46 * Initialization function. 47 */ 48protected int 49hist_init(EditLine *el) 50{ 51 52 el->el_history.fun = NULL; 53 el->el_history.ref = NULL; 54 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); 55 el->el_history.sz = EL_BUFSIZ; 56 if (el->el_history.buf == NULL) 57 return (-1); 58 el->el_history.last = el->el_history.buf; 59 return (0); 60} 61 62 63/* hist_end(): 64 * clean up history; 65 */ 66protected void 67hist_end(EditLine *el) 68{ 69 70 el_free((ptr_t) el->el_history.buf); 71 el->el_history.buf = NULL; 72} 73 74 75/* hist_set(): 76 * Set new history interface 77 */ 78protected int 79hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr) 80{ 81 82 el->el_history.ref = ptr; 83 el->el_history.fun = fun; 84 return (0); 85} 86 87 88/* hist_get(): 89 * Get a history line and update it in the buffer. 90 * eventno tells us the event to get. 91 */ 92protected el_action_t 93hist_get(EditLine *el) 94{ 95 const char *hp; 96 int h; 97 98 if (el->el_history.eventno == 0) { /* if really the current line */ 99 (void) strncpy(el->el_line.buffer, el->el_history.buf, 100 el->el_history.sz); 101 el->el_line.lastchar = el->el_line.buffer + 102 (el->el_history.last - el->el_history.buf); 103 104#ifdef KSHVI 105 if (el->el_map.type == MAP_VI) 106 el->el_line.cursor = el->el_line.buffer; 107 else 108#endif /* KSHVI */ 109 el->el_line.cursor = el->el_line.lastchar; 110 111 return (CC_REFRESH); 112 } 113 if (el->el_history.ref == NULL) 114 return (CC_ERROR); 115 116 hp = HIST_FIRST(el); 117 118 if (hp == NULL) 119 return (CC_ERROR); 120 121 for (h = 1; h < el->el_history.eventno; h++) 122 if ((hp = HIST_NEXT(el)) == NULL) { 123 el->el_history.eventno = h; 124 return (CC_ERROR); 125 } 126 (void) strlcpy(el->el_line.buffer, hp, 127 (size_t)(el->el_line.limit - el->el_line.buffer)); 128 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); 129 130 if (el->el_line.lastchar > el->el_line.buffer 131 && el->el_line.lastchar[-1] == '\n') 132 el->el_line.lastchar--; 133 if (el->el_line.lastchar > el->el_line.buffer 134 && el->el_line.lastchar[-1] == ' ') 135 el->el_line.lastchar--; 136#ifdef KSHVI 137 if (el->el_map.type == MAP_VI) 138 el->el_line.cursor = el->el_line.buffer; 139 else 140#endif /* KSHVI */ 141 el->el_line.cursor = el->el_line.lastchar; 142 143 return (CC_REFRESH); 144} 145 146 147/* hist_command() 148 * process a history command 149 */ 150protected int 151hist_command(EditLine *el, int argc, const char **argv) 152{ 153 const char *str; 154 int num; 155 HistEvent ev; 156 157 if (el->el_history.ref == NULL) 158 return (-1); 159 160 if (argc == 1 || strcmp(argv[1], "list") == 0) { 161 /* List history entries */ 162 163 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 164 (void) fprintf(el->el_outfile, "%d %s", 165 el->el_history.ev.num, str); 166 return (0); 167 } 168 169 if (argc != 3) 170 return (-1); 171 172 num = (int)strtol(argv[2], NULL, 0); 173 174 if (strcmp(argv[1], "size") == 0) 175 return history(el->el_history.ref, &ev, H_SETSIZE, num); 176 177 if (strcmp(argv[1], "unique") == 0) 178 return history(el->el_history.ref, &ev, H_SETUNIQUE, num); 179 180 return -1; 181} 182 183/* hist_enlargebuf() 184 * Enlarge history buffer to specified value. Called from el_enlargebufs(). 185 * Return 0 for failure, 1 for success. 186 */ 187protected int 188/*ARGSUSED*/ 189hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) 190{ 191 char *newbuf; 192 193 newbuf = realloc(el->el_history.buf, newsz); 194 if (!newbuf) 195 return 0; 196 197 (void) memset(&newbuf[oldsz], '\0', newsz - oldsz); 198 199 el->el_history.last = newbuf + 200 (el->el_history.last - el->el_history.buf); 201 el->el_history.buf = newbuf; 202 el->el_history.sz = newsz; 203 204 return 1; 205} 206