diff options
Diffstat (limited to 'hist.c')
| -rw-r--r-- | hist.c | 210 |
1 files changed, 210 insertions, 0 deletions
@@ -0,0 +1,210 @@ +/* $NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Christos Zoulas of Cornell University. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "config.h" +#if !defined(lint) && !defined(SCCSID) +#if 0 +static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93"; +#else +__RCSID("$NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos Exp $"); +#endif +#endif /* not lint && not SCCSID */ + +/* + * hist.c: History access functions + */ +#include <stdlib.h> +#include "el.h" + +/* hist_init(): + * Initialization function. + */ +protected int +hist_init(EditLine *el) +{ + + el->el_history.fun = NULL; + el->el_history.ref = NULL; + el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); + el->el_history.sz = EL_BUFSIZ; + if (el->el_history.buf == NULL) + return (-1); + el->el_history.last = el->el_history.buf; + return (0); +} + + +/* hist_end(): + * clean up history; + */ +protected void +hist_end(EditLine *el) +{ + + el_free((ptr_t) el->el_history.buf); + el->el_history.buf = NULL; +} + + +/* hist_set(): + * Set new history interface + */ +protected int +hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr) +{ + + el->el_history.ref = ptr; + el->el_history.fun = fun; + return (0); +} + + +/* hist_get(): + * Get a history line and update it in the buffer. + * eventno tells us the event to get. + */ +protected el_action_t +hist_get(EditLine *el) +{ + const char *hp; + int h; + + if (el->el_history.eventno == 0) { /* if really the current line */ + (void) strncpy(el->el_line.buffer, el->el_history.buf, + el->el_history.sz); + el->el_line.lastchar = el->el_line.buffer + + (el->el_history.last - el->el_history.buf); + +#ifdef KSHVI + if (el->el_map.type == MAP_VI) + el->el_line.cursor = el->el_line.buffer; + else +#endif /* KSHVI */ + el->el_line.cursor = el->el_line.lastchar; + + return (CC_REFRESH); + } + if (el->el_history.ref == NULL) + return (CC_ERROR); + + hp = HIST_FIRST(el); + + if (hp == NULL) + return (CC_ERROR); + + for (h = 1; h < el->el_history.eventno; h++) + if ((hp = HIST_NEXT(el)) == NULL) { + el->el_history.eventno = h; + return (CC_ERROR); + } + (void) strlcpy(el->el_line.buffer, hp, + (size_t)(el->el_line.limit - el->el_line.buffer)); + el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); + + if (el->el_line.lastchar > el->el_line.buffer + && el->el_line.lastchar[-1] == '\n') + el->el_line.lastchar--; + if (el->el_line.lastchar > el->el_line.buffer + && el->el_line.lastchar[-1] == ' ') + el->el_line.lastchar--; +#ifdef KSHVI + if (el->el_map.type == MAP_VI) + el->el_line.cursor = el->el_line.buffer; + else +#endif /* KSHVI */ + el->el_line.cursor = el->el_line.lastchar; + + return (CC_REFRESH); +} + + +/* hist_command() + * process a history command + */ +protected int +hist_command(EditLine *el, int argc, const char **argv) +{ + const char *str; + int num; + HistEvent ev; + + if (el->el_history.ref == NULL) + return (-1); + + if (argc == 1 || strcmp(argv[1], "list") == 0) { + /* List history entries */ + + for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) + (void) fprintf(el->el_outfile, "%d %s", + el->el_history.ev.num, str); + return (0); + } + + if (argc != 3) + return (-1); + + num = (int)strtol(argv[2], NULL, 0); + + if (strcmp(argv[1], "size") == 0) + return history(el->el_history.ref, &ev, H_SETSIZE, num); + + if (strcmp(argv[1], "unique") == 0) + return history(el->el_history.ref, &ev, H_SETUNIQUE, num); + + return -1; +} + +/* hist_enlargebuf() + * Enlarge history buffer to specified value. Called from el_enlargebufs(). + * Return 0 for failure, 1 for success. + */ +protected int +/*ARGSUSED*/ +hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz) +{ + char *newbuf; + + newbuf = realloc(el->el_history.buf, newsz); + if (!newbuf) + return 0; + + (void) memset(&newbuf[oldsz], '\0', newsz - oldsz); + + el->el_history.last = newbuf + + (el->el_history.last - el->el_history.buf); + el->el_history.buf = newbuf; + el->el_history.sz = newsz; + + return 1; +} |