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/* $OpenBSD: hist.c,v 1.18 2017/04/12 18:24:37 tb Exp $ */ |
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/* $NetBSD: hist.c,v 1.28 2016/04/11 00:50:13 christos Exp $ */ |
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/*- |
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* Copyright (c) 1992, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Christos Zoulas of Cornell University. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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/* |
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* hist.c: History access functions |
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*/ |
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#include <stdlib.h> |
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#include <string.h> |
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#include "el.h" |
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/* hist_init(): |
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* Initialization function. |
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*/ |
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protected int |
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hist_init(EditLine *el) |
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{ |
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el->el_history.fun = NULL; |
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el->el_history.ref = NULL; |
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el->el_history.buf = reallocarray(NULL, EL_BUFSIZ, |
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sizeof(*el->el_history.buf)); |
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el->el_history.sz = EL_BUFSIZ; |
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✗✓ |
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if (el->el_history.buf == NULL) |
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return -1; |
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el->el_history.last = el->el_history.buf; |
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return 0; |
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} |
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/* hist_end(): |
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* clean up history; |
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*/ |
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protected void |
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hist_end(EditLine *el) |
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{ |
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free(el->el_history.buf); |
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el->el_history.buf = NULL; |
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} |
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/* hist_set(): |
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* Set new history interface |
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*/ |
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protected int |
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hist_set(EditLine *el, hist_fun_t fun, void *ptr) |
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{ |
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el->el_history.ref = ptr; |
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el->el_history.fun = fun; |
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return 0; |
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} |
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/* hist_get(): |
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* Get a history line and update it in the buffer. |
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* eventno tells us the event to get. |
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*/ |
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protected el_action_t |
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hist_get(EditLine *el) |
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{ |
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const wchar_t *hp; |
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int h; |
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if (el->el_history.eventno == 0) { /* if really the current line */ |
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(void) wcsncpy(el->el_line.buffer, el->el_history.buf, |
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el->el_history.sz); |
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el->el_line.lastchar = el->el_line.buffer + |
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(el->el_history.last - el->el_history.buf); |
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#ifdef KSHVI |
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if (el->el_map.type == MAP_VI) |
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el->el_line.cursor = el->el_line.buffer; |
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else |
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#endif /* KSHVI */ |
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el->el_line.cursor = el->el_line.lastchar; |
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return CC_REFRESH; |
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} |
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if (el->el_history.ref == NULL) |
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return CC_ERROR; |
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hp = HIST_FIRST(el); |
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if (hp == NULL) |
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return CC_ERROR; |
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for (h = 1; h < el->el_history.eventno; h++) |
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if ((hp = HIST_NEXT(el)) == NULL) { |
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el->el_history.eventno = h; |
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return CC_ERROR; |
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} |
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(void) wcsncpy(el->el_line.buffer, hp, |
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(size_t)(el->el_line.limit - el->el_line.buffer)); |
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el->el_line.buffer[el->el_line.limit - el->el_line.buffer - 1] = '\0'; |
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el->el_line.lastchar = el->el_line.buffer + wcslen(el->el_line.buffer); |
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if (el->el_line.lastchar > el->el_line.buffer |
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&& el->el_line.lastchar[-1] == '\n') |
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el->el_line.lastchar--; |
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if (el->el_line.lastchar > el->el_line.buffer |
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&& el->el_line.lastchar[-1] == ' ') |
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el->el_line.lastchar--; |
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#ifdef KSHVI |
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if (el->el_map.type == MAP_VI) |
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el->el_line.cursor = el->el_line.buffer; |
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else |
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#endif /* KSHVI */ |
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el->el_line.cursor = el->el_line.lastchar; |
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return CC_REFRESH; |
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} |
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/* hist_command() |
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* process a history command |
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*/ |
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protected int |
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hist_command(EditLine *el, int argc, const wchar_t **argv) |
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{ |
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const wchar_t *str; |
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int num; |
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HistEvent ev; |
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if (el->el_history.ref == NULL) |
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return -1; |
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if (argc == 1 || wcscmp(argv[1], L"list") == 0) { |
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/* List history entries */ |
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for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) |
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(void) fprintf(el->el_outfile, "%d %s", |
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el->el_history.ev.num, ct_encode_string(str, &el->el_scratch)); |
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return 0; |
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} |
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if (argc != 3) |
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return -1; |
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num = (int)wcstol(argv[2], NULL, 0); |
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if (wcscmp(argv[1], L"size") == 0) |
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return history(el->el_history.ref, &ev, H_SETSIZE, num); |
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if (wcscmp(argv[1], L"unique") == 0) |
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return history(el->el_history.ref, &ev, H_SETUNIQUE, num); |
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return -1; |
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} |
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/* hist_enlargebuf() |
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* Enlarge history buffer to specified value. Called from el_enlargebufs(). |
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* Return 0 for failure, 1 for success. |
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*/ |
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protected int |
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/*ARGSUSED*/ |
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hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) |
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{ |
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wchar_t *newbuf; |
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newbuf = recallocarray(el->el_history.buf, oldsz, newsz, |
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sizeof(*newbuf)); |
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if (!newbuf) |
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return 0; |
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el->el_history.last = newbuf + |
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(el->el_history.last - el->el_history.buf); |
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el->el_history.buf = newbuf; |
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el->el_history.sz = newsz; |
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return 1; |
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} |
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protected wchar_t * |
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hist_convert(EditLine *el, int fn, void *arg) |
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{ |
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HistEventW ev; |
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if ((*(el)->el_history.fun)((el)->el_history.ref, &ev, fn, arg) == -1) |
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return NULL; |
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return ct_decode_string((const char *)(const void *)ev.str, |
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&el->el_scratch); |
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} |