1 /* $OpenBSD: hist.c,v 1.10 2014/10/17 06:07:50 deraadt Exp $ */ 2 /* $NetBSD: hist.c,v 1.17 2009/12/30 23:54:52 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 "config.h" 37 38 /* 39 * hist.c: History access functions 40 */ 41 #include <stdlib.h> 42 #include "el.h" 43 44 /* hist_init(): 45 * Initialization function. 46 */ 47 protected int 48 hist_init(EditLine *el) 49 { 50 51 el->el_history.fun = NULL; 52 el->el_history.ref = NULL; 53 el->el_history.buf = reallocarray(NULL, EL_BUFSIZ, 54 sizeof(*el->el_history.buf)); 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 */ 66 protected void 67 hist_end(EditLine *el) 68 { 69 70 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 */ 78 protected int 79 hist_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 */ 92 protected el_action_t 93 hist_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) Strncpy(el->el_line.buffer, hp, 127 (size_t)(el->el_line.limit - el->el_line.buffer)); 128 el->el_line.buffer[el->el_line.limit - el->el_line.buffer - 1] = '\0'; 129 el->el_line.lastchar = el->el_line.buffer + Strlen(el->el_line.buffer); 130 131 if (el->el_line.lastchar > el->el_line.buffer 132 && el->el_line.lastchar[-1] == '\n') 133 el->el_line.lastchar--; 134 if (el->el_line.lastchar > el->el_line.buffer 135 && el->el_line.lastchar[-1] == ' ') 136 el->el_line.lastchar--; 137 #ifdef KSHVI 138 if (el->el_map.type == MAP_VI) 139 el->el_line.cursor = el->el_line.buffer; 140 else 141 #endif /* KSHVI */ 142 el->el_line.cursor = el->el_line.lastchar; 143 144 return (CC_REFRESH); 145 } 146 147 148 /* hist_command() 149 * process a history command 150 */ 151 protected int 152 hist_command(EditLine *el, int argc, const Char **argv) 153 { 154 const Char *str; 155 int num; 156 HistEvent ev; 157 158 if (el->el_history.ref == NULL) 159 return (-1); 160 161 if (argc == 1 || Strcmp(argv[1], STR("list")) == 0) { 162 /* List history entries */ 163 164 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 165 (void) fprintf(el->el_outfile, "%d %s", 166 el->el_history.ev.num, ct_encode_string(str, &el->el_scratch)); 167 return (0); 168 } 169 170 if (argc != 3) 171 return (-1); 172 173 num = (int)Strtol(argv[2], NULL, 0); 174 175 if (Strcmp(argv[1], STR("size")) == 0) 176 return history(el->el_history.ref, &ev, H_SETSIZE, num); 177 178 if (Strcmp(argv[1], STR("unique")) == 0) 179 return history(el->el_history.ref, &ev, H_SETUNIQUE, num); 180 181 return -1; 182 } 183 184 /* hist_enlargebuf() 185 * Enlarge history buffer to specified value. Called from el_enlargebufs(). 186 * Return 0 for failure, 1 for success. 187 */ 188 protected int 189 /*ARGSUSED*/ 190 hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) 191 { 192 Char *newbuf; 193 194 newbuf = reallocarray(el->el_history.buf, newsz, sizeof(*newbuf)); 195 if (!newbuf) 196 return 0; 197 198 (void) memset(&newbuf[oldsz], '\0', (newsz - oldsz) * sizeof(*newbuf)); 199 200 el->el_history.last = newbuf + 201 (el->el_history.last - el->el_history.buf); 202 el->el_history.buf = newbuf; 203 el->el_history.sz = newsz; 204 205 return 1; 206 } 207 208 #ifdef WIDECHAR 209 protected wchar_t * 210 hist_convert(EditLine *el, int fn, ptr_t arg) 211 { 212 HistEventW ev; 213 if ((*(el)->el_history.fun)((el)->el_history.ref, &ev, fn, arg) == -1) 214 return NULL; 215 return ct_decode_string((const char *)(const void *)ev.str, 216 &el->el_scratch); 217 } 218 #endif 219