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literal.c revision 1.2 
      1 /*	$NetBSD: literal.c,v 1.2 2017/06/29 02:54:40 kre Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2017 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include "config.h"
     33 #if !defined(lint) && !defined(SCCSID)
     34 __RCSID("$NetBSD: literal.c,v 1.2 2017/06/29 02:54:40 kre Exp $");
     35 #endif /* not lint && not SCCSID */
     36 
     37 /*
     38  * literal.c: Literal sequences handling.
     39  */
     40 #include <assert.h>
     41 #include <stdio.h>
     42 #include <stdlib.h>
     43 #include <string.h>
     44 #include "el.h"
     45 
     46 libedit_private void
     47 literal_init(EditLine *el)
     48 {
     49 	el_literal_t *l = &el->el_literal;
     50 	memset(l, 0, sizeof(*l));
     51 }
     52 
     53 libedit_private void
     54 literal_end(EditLine *el)
     55 {
     56 	el_literal_t *l = &el->el_literal;
     57 	literal_clear(el);
     58 	el_free(l->l_buf);
     59 }
     60 
     61 libedit_private void
     62 literal_clear(EditLine *el)
     63 {
     64 	el_literal_t *l = &el->el_literal;
     65 	size_t i;
     66 	for (i = 0; i < l->l_idx; i++)
     67 		el_free(l->l_buf[i]);
     68 	l->l_len = 0;
     69 	l->l_idx = 0;
     70 }
     71 
     72 libedit_private wint_t
     73 literal_add(EditLine *el, const wchar_t *buf, const wchar_t *end)
     74 {
     75 	// XXX: Only for narrow chars now.
     76 	el_literal_t *l = &el->el_literal;
     77 	size_t i, len;
     78 	char *b;
     79 
     80 	len = (size_t)(end - buf);
     81 	b = el_malloc(len + 2);
     82 	if (b == NULL)
     83 		return 0;
     84 	for (i = 0; i < len; i++)
     85 		b[i] = (char)buf[i];
     86 	b[len] = (char)end[1];
     87 	b[len + 1] = '\0';
     88 	if (l->l_idx == l->l_len) {
     89 		l->l_len += 10;
     90 		char **bp = el_realloc(l->l_buf, sizeof(*l->l_buf) * l->l_len);
     91 		if (bp == NULL) {
     92 			free(b);
     93 			return 0;
     94 		}
     95 		l->l_buf = bp;
     96 	}
     97 	l->l_buf[l->l_idx++] = b;
     98 	return EL_LITERAL | (wint_t)(l->l_idx - 1);
     99 }
    100 
    101 libedit_private const char *
    102 literal_get(EditLine *el, wint_t idx)
    103 {
    104 	el_literal_t *l = &el->el_literal;
    105 	assert(idx & EL_LITERAL);
    106 	idx &= ~EL_LITERAL;
    107 	assert(l->l_idx > (size_t)idx);
    108 	return l->l_buf[idx];
    109 }
    110