GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libedit/hist.c Lines: 11 74 14.9 %
Date: 2017-11-13 Branches: 1 58 1.7 %

Line Branch Exec Source
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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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	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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}