1 /* $OpenBSD: hist.c,v 1.18 2017/04/12 18:24:37 tb Exp $ */ 2 /* $NetBSD: hist.c,v 1.28 2016/04/11 00:50:13 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 <string.h> 43 44 #include "el.h" 45 46 /* hist_init(): 47 * Initialization function. 48 */ 49 protected int 50 hist_init(EditLine *el) 51 { 52 53 el->el_history.fun = NULL; 54 el->el_history.ref = NULL; 55 el->el_history.buf = reallocarray(NULL, EL_BUFSIZ, 56 sizeof(*el->el_history.buf)); 57 el->el_history.sz = EL_BUFSIZ; 58 if (el->el_history.buf == NULL) 59 return -1; 60 el->el_history.last = el->el_history.buf; 61 return 0; 62 } 63 64 65 /* hist_end(): 66 * clean up history; 67 */ 68 protected void 69 hist_end(EditLine *el) 70 { 71 72 free(el->el_history.buf); 73 el->el_history.buf = NULL; 74 } 75 76 77 /* hist_set(): 78 * Set new history interface 79 */ 80 protected int 81 hist_set(EditLine *el, hist_fun_t fun, void *ptr) 82 { 83 84 el->el_history.ref = ptr; 85 el->el_history.fun = fun; 86 return 0; 87 } 88 89 90 /* hist_get(): 91 * Get a history line and update it in the buffer. 92 * eventno tells us the event to get. 93 */ 94 protected el_action_t 95 hist_get(EditLine *el) 96 { 97 const wchar_t *hp; 98 int h; 99 100 if (el->el_history.eventno == 0) { /* if really the current line */ 101 (void) wcsncpy(el->el_line.buffer, el->el_history.buf, 102 el->el_history.sz); 103 el->el_line.lastchar = el->el_line.buffer + 104 (el->el_history.last - el->el_history.buf); 105 106 #ifdef KSHVI 107 if (el->el_map.type == MAP_VI) 108 el->el_line.cursor = el->el_line.buffer; 109 else 110 #endif /* KSHVI */ 111 el->el_line.cursor = el->el_line.lastchar; 112 113 return CC_REFRESH; 114 } 115 if (el->el_history.ref == NULL) 116 return CC_ERROR; 117 118 hp = HIST_FIRST(el); 119 120 if (hp == NULL) 121 return CC_ERROR; 122 123 for (h = 1; h < el->el_history.eventno; h++) 124 if ((hp = HIST_NEXT(el)) == NULL) { 125 el->el_history.eventno = h; 126 return CC_ERROR; 127 } 128 (void) wcsncpy(el->el_line.buffer, hp, 129 (size_t)(el->el_line.limit - el->el_line.buffer)); 130 el->el_line.buffer[el->el_line.limit - el->el_line.buffer - 1] = '\0'; 131 el->el_line.lastchar = el->el_line.buffer + wcslen(el->el_line.buffer); 132 133 if (el->el_line.lastchar > el->el_line.buffer 134 && el->el_line.lastchar[-1] == '\n') 135 el->el_line.lastchar--; 136 if (el->el_line.lastchar > el->el_line.buffer 137 && el->el_line.lastchar[-1] == ' ') 138 el->el_line.lastchar--; 139 #ifdef KSHVI 140 if (el->el_map.type == MAP_VI) 141 el->el_line.cursor = el->el_line.buffer; 142 else 143 #endif /* KSHVI */ 144 el->el_line.cursor = el->el_line.lastchar; 145 146 return CC_REFRESH; 147 } 148 149 150 /* hist_command() 151 * process a history command 152 */ 153 protected int 154 hist_command(EditLine *el, int argc, const wchar_t **argv) 155 { 156 const wchar_t *str; 157 int num; 158 HistEvent ev; 159 160 if (el->el_history.ref == NULL) 161 return -1; 162 163 if (argc == 1 || wcscmp(argv[1], L"list") == 0) { 164 /* List history entries */ 165 166 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) 167 (void) fprintf(el->el_outfile, "%d %s", 168 el->el_history.ev.num, ct_encode_string(str, &el->el_scratch)); 169 return 0; 170 } 171 172 if (argc != 3) 173 return -1; 174 175 num = (int)wcstol(argv[2], NULL, 0); 176 177 if (wcscmp(argv[1], L"size") == 0) 178 return history(el->el_history.ref, &ev, H_SETSIZE, num); 179 180 if (wcscmp(argv[1], L"unique") == 0) 181 return history(el->el_history.ref, &ev, H_SETUNIQUE, num); 182 183 return -1; 184 } 185 186 /* hist_enlargebuf() 187 * Enlarge history buffer to specified value. Called from el_enlargebufs(). 188 * Return 0 for failure, 1 for success. 189 */ 190 protected int 191 /*ARGSUSED*/ 192 hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) 193 { 194 wchar_t *newbuf; 195 196 newbuf = recallocarray(el->el_history.buf, oldsz, newsz, 197 sizeof(*newbuf)); 198 if (!newbuf) 199 return 0; 200 201 el->el_history.last = newbuf + 202 (el->el_history.last - el->el_history.buf); 203 el->el_history.buf = newbuf; 204 el->el_history.sz = newsz; 205 206 return 1; 207 } 208 209 protected wchar_t * 210 hist_convert(EditLine *el, int fn, void *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